WO2011074226A1

WO2011074226A1 - Refrigerator

Info

Publication number: WO2011074226A1
Application number: PCT/JP2010/007210
Authority: WO
Inventors: 剛樹平井; 亜有子中村; 理上野; 嘉浩伊藤
Original assignee: パナソニック株式会社
Priority date: 2009-12-16
Filing date: 2010-12-13
Publication date: 2011-06-23
Also published as: JP5671705B2; JPWO2011074226A1; BR112012014435B1; BR112012014435A2; CN102656413B; CN102656413A; BR112012014435B8

Abstract

A refrigerator is provided with a refrigerator body (20) which has a heat-insulated box (21) in which storage chambers including a cold-storage chamber (29) are formed. The heat-insulated box (21) is provided with an outer box (23), an inner box (22), and a heat-insulating material (24) disposed between the outer box (23) and the inner box (22). The refrigerator is also provided with a containing section (101) which contains, among refrigeration cycle-related devices including devices constituting the refrigeration cycle, external devices exposed to the outside air. The containing section (101) is disposed at the rear of the lower portion of the lowermost storage chamber of the heat-insulated box (21). The refrigerator is also provided with a heat-insulated wall which is formed by integrating together the bottom surface of the lowermost storage chamber and the bottom surface of the containing section. The configuration increases the rigidity of the lower part of the outer box (23), and as a result, the rigidity of the entire heat-insulated box (21) is high.

Description

refrigerator

This invention relates to the refrigerator provided with the heat insulation box.

The heat insulation box used for a refrigerator has a recessed part in the lower part on the back side, as disclosed in Patent Document 1, for example. FIG. 18 is a cross-sectional view of the refrigerator described in Patent Document 1. The heat insulating box 2 of the refrigerator 1 has an outer box 3 made of steel plate and an inner box 4 made of resin. Between the outer box 3 and the inner box 4, a heat insulating material 5 is filled by foaming. The heat insulation box 2 has a recess 2a at the bottom on the back side. The recessed part 2a is formed in the shape which notched the part of the back | inner side lower part of the heat insulation box 2 to the whole left-right direction. A machine room 8 is provided in the recess 2a. The machine room 8 is provided with a compressor 6 and a compressor support 7 that supports the compressor 6. The compressor 6 forms part of the refrigeration cycle.

The structure of the lower part of the heat insulation box 2 has a great influence on the rigidity of the heat insulation box 2. However, since the heat insulation box 2 having the above configuration has the recess 2a in the lower part on the back side, the rigidity is lowered. When the heat insulation box 2 rigidity is lowered, the heat insulation box 2 is distorted, so that the durability of the heat insulation box 2 is lowered. Further, due to this distortion, a gap is generated in the heat insulating box 2. Due to this gap, the heat insulating property of the heat insulating box 2 is lowered.

Japanese Patent No. 2846602

The present invention provides a refrigerator with high rigidity of a heat insulating box. The refrigerator according to the present invention includes a refrigerator main body having a heat insulating box with a storage chamber formed therein. Further, in the refrigerator according to the present invention, the heat insulating box includes an outer box, an inner box, and a heat insulating wall formed by a heat insulating material filled between the outer box and the inner box. Furthermore, the refrigerator which concerns on this invention has a storage part which accommodates the external apparatus exposed to external air in the refrigerating-cycle related apparatus containing the apparatus which comprises a refrigerating cycle. Furthermore, as for the refrigerator which concerns on this invention, a storage part is arrange | positioned at the back | inner side lower part of the lowermost store room of a heat insulation box. Furthermore, the refrigerator according to the present invention includes a heat insulating wall in which a bottom surface portion of the lowermost storage chamber and a bottom surface portion of the storage portion are integrally formed. With this configuration, the rigidity of the lower portion of the outer box is increased, so that the rigidity of the entire heat insulating box is increased.

Thus, according to the present invention, the rigidity of the heat insulating box is increased. Thereby, a highly reliable refrigerator with little distortion can be obtained.

FIG. 1 is a front view of the refrigerator according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view of the refrigerator in the present embodiment. FIG. 3 is an exploded perspective view of the heat insulation box in the same embodiment. FIG. 4 is a bottom view of the refrigerator in the present embodiment. FIG. 5 is a cross-sectional view taken along line 5-5 of FIG. FIG. 6 is a cross-sectional view of the refrigerator in the second embodiment of the present invention. FIG. 7 is an exploded perspective view of the heat insulation box in the same embodiment. FIG. 8 is a cross-sectional view of the refrigerator in the third embodiment of the present invention. FIG. 9 is a cross-sectional view showing another configuration of the refrigerator in the present embodiment. FIG. 10 is a cross-sectional view of the refrigerator in the fourth embodiment of the present invention. FIG. 11 is an exploded perspective view of the heat insulation box in the same embodiment. FIG. 12 is a cross-sectional view of the refrigerator in the fifth embodiment of the present invention. FIG. 13 is an exploded perspective view of the heat insulation box in the same embodiment. FIG. 14 is a cross-sectional view of the refrigerator in the sixth embodiment of the present invention. FIG. 15 is an exploded perspective view of the heat insulation box in the same embodiment. FIG. 16 is a cross-sectional view of the refrigerator in the seventh embodiment of the present invention. FIG. 17 is an exploded perspective view of the heat insulation box in the same embodiment. FIG. 18 is a cross-sectional view of a conventional refrigerator.

(Embodiment 1)
FIG. 1 is a front view of the refrigerator according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view of the refrigerator according to the present embodiment. FIG. 2 is a cross-sectional view of the refrigerator as viewed from the right side. FIG. 3 is an exploded perspective view of the heat insulating box of the refrigerator according to the present embodiment. FIG. 4 is a bottom view of the refrigerator according to the present embodiment. In FIG. 2, the left side is the front of the refrigerator. In FIG. 4, the lower side is the front of the refrigerator.

The heat insulating box 21 of the refrigerator main body 20 includes an inner box 22, an outer box 23, and a heat insulating material 24. The inner box 22 is made of resin. The outer box 23 is formed of a metal magnetic material such as a steel plate and a material having good thermal conductivity. The heat insulating material 24 is filled between the inner box 22 and the outer box 23. A heat insulating wall is formed by the inner box 22, the outer box 23, and the heat insulating material 24 filled therebetween. That is, the heat insulating material 24 sandwiched between the wall surfaces constituting the inner box 22 and the outer box 23 acts as a heat insulating wall. The heat insulation box 21 has a front opening 21a on the front surface. The inside of the heat insulation box 21 is partitioned by

partition walls

25, 26, 27, and 28. As a result, a plurality of storage chambers are formed in the heat insulating box 21. The plurality of storage rooms are a refrigerator room 29, an ice making room 30, a first freezer room 31, a second freezer room 32, and a vegetable room 33 from the top. As shown in FIG. 1, the ice making chamber 30 and the first freezing chamber 31 are formed side by side.

Each storage room has a door. Specifically, the doors are a refrigerator compartment door 29a, an ice making compartment door 30a, a first freezer compartment door 31a, a second freezer compartment door 32a, and a vegetable compartment door 33a. Each door has an insulating wall. The front opening 21a is closed by closing each door. That is, each storage chamber is opened and closed by each door. The refrigerator compartment door 29a includes an upper hinge 34 at the upper right end and a lower hinge 35 at the lower right end. Each of the upper hinge 34 and the lower hinge 35 has a rotation axis. Thereby, the refrigerator compartment door 29a rotates with respect to the heat insulation box 21, and opens and closes. The storage room corresponding to the other doors is a drawer type. That is, the doors are opened and closed in the front-rear direction with respect to the heat insulating box 21 by the rail members 36 provided in the respective storage chambers.

The rail member 36 is configured according to the drawer capacity and the drawer length of each storage room. For example, the ice making chamber 30 with a small capacity and the vegetable room 33 with a large capacity are configured with different members and at different positions.

When each door is closed, a space 37 of about 5 mm is formed between the surface of each door on the heat insulating box 21 side and the front opening 21a. A gasket 38 is provided around the surface of each door on the heat insulating box 21 side. In FIG. 1, the gasket 38 provided on the refrigerator compartment door 29 a is illustrated, but the gasket 38 is provided similarly on the doors of other storage compartments. The gasket 38 has a magnet. Due to the magnetic force of the magnet, the gasket 38 is in close contact with the steel plate constituting the outer box 23 around the front opening 21a. Thereby, each storage chamber is sealed.

The heat insulation box 21 is provided with a refrigeration cycle for cooling the refrigerator body 20. The refrigeration cycle includes a compressor 50, a condenser including a side refrigerant pipe 52 and a front refrigerant pipe 53, a decompressor (not shown), and an evaporator 51 in order. In this way, a series of refrigerant flow paths is configured.

Moreover, frost is generated in the evaporator 51 by the operation of the refrigeration cycle. Melting frost into water is called defrosting. Water generated by melting frost is called defrost water. Therefore, the refrigerator main body 20 has the defrost water process part 100 for evaporating defrost water as a refrigeration cycle related apparatus required for a refrigerating cycle.

Among the refrigeration cycle-related devices including these refrigeration cycle devices, the external devices exposed to the outside air are the compressor 50 and the defrost water treatment unit 100. A reciprocating compressor is used as the compressor 50 that is an external device exposed to the outside air. The reciprocating compressor compresses the refrigerant as the piston reciprocates inside the cylinder. For example, isobutane is used as the refrigerant. Isobutane is a hydrocarbon-based refrigerant. Isobutane is generally used as a refrigerant for household refrigerators as an alternative chlorofluorocarbon. Isobutane is flammable and has a higher specific gravity than air.

The defrosting water treatment unit 100 that is an external device exposed to the outside air is provided at the lower back of the heat insulating box 21. Specifically, a hole 61 a is formed in the lower part of the back member 61. A resin storage part 101 is mounted in the hole 61a. The storage unit 101 is open on the back side, and is provided with a compressor 50 and a defrosted water treatment unit 102 therein. The storage unit 101, the compressor 50, and the defrost water treatment unit 102 constitute a defrost water treatment unit 100.

As shown in FIG. 4, the side refrigerant pipe 52 as a condenser is fixed to the inside of the left and right side surfaces of the outer box 23, that is, to the heat insulating material 24 side. The front refrigerant pipe 53 as a condenser is fixed to the vicinity of the front opening 21 a of the outer box 23 and to the heat insulating material 24 side. That is, the side refrigerant pipe 52 and the front refrigerant pipe 53 are located inside the heat insulating wall. The side refrigerant pipe 52 and the front refrigerant pipe 53 occupy 80% or more of the total length of the condenser.

Here, the position where the front refrigerant pipe 53 is disposed in the outer box 23 will be described. As shown in FIG. 3, the front refrigerant pipe 53 is formed by a single pipe with the upper side of the heat insulating box 21 as an open end. The front refrigerant pipe 53 is disposed in the same manner as the side refrigerant pipe 52 above the partition wall 25, that is, on the side of the refrigerator compartment 29, at a position of 90 mm from the front opening 21 a to the back side. That is, the front refrigerant pipe 53 is fixed to the heat insulating material 24 side of the outer box 23.

On the other hand, the front refrigerant pipe 53 is disposed more on the front side below the partition wall 25. FIG. 5 is a cross-sectional view taken along line 5-5 of FIG. That is, FIG. 5 is a cross-sectional view of the front left side below the partition wall 25 of the heat insulation box 21 cut horizontally. In FIG. 5, the lower side is the front side of the refrigerator body 20. The front refrigerant pipe 53 is disposed along the front flange 23 a of the outer box 23 below the partition wall 25. The front flange 23a of the outer box 23 includes an outer flange 23b that is the front surface of the storage chamber, and an inner flange 23c that is formed on the back side of the outer flange 23b. Accordingly, the lower part of the front refrigerant pipe 53 is a corner formed by the inner flange 23c and the front flange 23a, and is disposed on the side where the heat insulating material 24 is filled.

As described above, the side refrigerant pipe 52 and the front refrigerant pipe 53 constitute a part of the refrigeration cycle as a condenser. The side refrigerant pipe 52 and the front refrigerant pipe 53 radiate heat of condensation when the refrigerant is condensed. By this heat dissipation, dew condensation on the left and right side surfaces of the heat insulating box 21 and the vicinity of the front opening 21a and the gasket 38 is prevented. That is, the side refrigerant pipe 52 and the front refrigerant pipe 53 act as a heating element.

3 and 4, the outer box 23 includes a main member 60, an upper surface member 62, and a back member 61. The main member 60 is formed by integrating the bottom surface portion 60a and the left and right side surface portions 60b. The upper surface member 62 forms the upper surface of the outer box 23. The back member 61 forms the back of the outer box 23, that is, the back surface of the refrigerator body 20.

A vacuum heat insulating material 70 is provided in a portion of the side refrigerant pipe 52 facing at least the ice making chamber 30, the first freezing chamber 31, and the second freezing chamber 32. The vacuum heat insulating material 70 is fixed to the heat insulating material 24 side of the main member 60 with the side refrigerant pipe 52 interposed therebetween. The heat conductivity of the vacuum heat insulating material 70 is smaller than the heat conductivity of the heat insulating material 24.

The heat insulating box 21 includes two front support legs 80 and two back support legs 90 as support legs on the bottom surface. The front support legs 80 are provided at the left and right corners on the front side of the refrigerator body 20. The back side support legs 90 are provided at the left and right corners on the back side of the refrigerator main body 20.

Specifically, the front support leg 80 is a bottom surface of the main member 60 and is fixed to the inner side from both side surfaces. The front end portion 81 of the front support leg 80 is provided so as to protrude from the front opening 21a to the same position as the front surface of the vegetable compartment door 33a. The refrigerator main body 20 is supported by the front end portion 81.

The leg back side support leg 90 is provided on the bottom surface of the main member 60 and in the chamfering region 21 c of the left and right corners on the back side of the heat insulating box 21. The chamfered region 21 c is surrounded by the surface of the chamfered portion 21 b provided at the left and right corners on the back side of the heat insulating box 21, the extended surface of the side surface of the refrigerator body 20, and the extended surface of the back surface of the refrigerator body 20. Area. The back end 91 of the back support leg 90 is provided so as to protrude to the innermost part of the heat insulating box 21. The refrigerator main body 20 is supported by the rear end portion 91.

As the front support leg 80 and the back support leg 90, for example, an adjuster or a caster is used. The adjuster is a leg having a height adjusting function. The position of the refrigerator main body 20 with respect to the ground plane is adjusted by the adjuster. The caster is a leg provided with a roller or the like. The caster facilitates the movement of the refrigerator body 20.

A lower concave portion 22b is formed in the lower part of the rear side of the vegetable chamber 33, that is, the lower part of the inner side of the inner box 22. The lower concave portion 22b is formed corresponding to the shape of the storage unit 101 that stores the defrost water processing unit 100 that is an external device exposed to the outside air. Between the lower concave portion 22b and the storage portion 101, a heat insulating material 24 is filled. The heat insulating material 24 is also filled between the left and right side surfaces and the bottom surface of the storage unit 101 and the main member 60. In this way, a heat insulating wall around the storage portion 101 is formed. The heat insulating walls around the storage unit 101 have the same thickness as the heat insulating walls on the left and right side surfaces and the bottom surface of the vegetable room 33.

This same thickness includes the case of almost the same thickness. Specifically, the thickness of the heat insulating wall on the bottom surface on the foremost side of the storage unit 101 is ± 10% of the thickness of the heat insulating wall on the bottom surface on the farthest side of the vegetable room 33, that is, a thickness of 90% to 110%. That's it.

In addition to the heat insulating wall on the bottom surface, a heat insulating wall on the side surface is formed around the storage unit 101. The heat insulating walls on the side surfaces include left and right heat insulating walls constituting the left and right surfaces of the heat insulating box 21 and heat insulating walls formed between the storage unit 101 and the vegetable compartment 33. The thickness of the heat insulating wall on the side surface of the storage unit 101 is most desirably ± 10% of the thickness of the heat insulating wall on the bottom surface of the storage unit 101, that is, 90% to 110%. However, due to design restrictions, the thickness of the heat insulating wall on the side surface of the storage unit 101 is ± 15% of the thickness of the heat insulating wall on the bottom surface of the storage unit 101, that is, 85% to 115%. Also good. Even in this case, the rigidity in the vicinity of the bottom surface portion is not biased, and the heat insulating box 21 having high rigidity is formed. The heat insulating wall at the bottom of the storage unit 101 is substantially horizontal (including horizontal) with the heat insulating wall on the bottom surface of the vegetable compartment 33, and is formed integrally with the heat insulating wall of the heat insulating box 21.

The storage part 101 provided in the lower part of the back side of the vegetable compartment 33 which is the lowest storage room of the heat insulation box 21 is provided with an extending part 101 a extending from the heat insulating wall 60 a on the bottom surface of the vegetable compartment 33. The heat insulating wall 60a on the bottom surface of the vegetable chamber 33 and the extending portion 101a are integrally formed. The back side of the storage unit 101 is covered with a cover 101b. The cover 101b is formed with an opening that communicates with outside air that is the air around the refrigerator. With this opening, the storage unit 101 has air in and out of the outside air. That is, the inside of the storage unit 101 is exposed to the outside air.

When using a foam heat insulating material as the heat insulating material 24, the heat insulating material 24 is filled between the inner box 22 and the outer box 23. Simultaneously with this filling, the heat insulating material 24 is filled around the storage portion 101, whereby the rigidity of the heat insulating box 21 is further increased.

The operation and action of the refrigerator configured as described above will be described.

When the compressor 50 operates, the refrigerant is compressed. The compressed refrigerant becomes high temperature and high pressure and is discharged from the compressor 50. The discharged refrigerant dissipates heat by exchanging heat with air around the refrigerator body 20 in the condenser. Due to this heat dissipation, condensation of the left and right side surface portions 60b of the main member 60, the vicinity of the front surface opening 21a, and the gasket 38 is prevented. The refrigerant is condensed by heat radiation and becomes a condensate. The refrigerant that has become the condensate is decompressed in the decompressor. The decompressed refrigerant evaporates by exchanging heat with the air inside the storage chamber in the evaporator. Due to this evaporation, the air around the evaporator becomes cold. By circulating this low-temperature air inside the storage room, the storage room is cooled. The side refrigerant pipe 52 and the front refrigerant pipe 53 bear most of the heat radiation required for the condenser.

In this embodiment, isobutane is used as the refrigerant. Isobutane is a hydrocarbon-based refrigerant.

Table 1 shows physical property values of isobutane, R134a and CO ₂ in a saturated solution at −30 ° C. R134a is a conventional alternative chlorofluorocarbon. CO ₂ is a natural refrigerant.

As shown in Table 1, the refrigeration capacity per unit volume of isobutane is 520.8 kJ. On the other hand, the refrigerating capacity per unit volume of R134a is 971.6 kJ. That is, the refrigeration capacity per unit volume of isobutane is about ½ compared to R134a. Therefore, in order to make the refrigerating capacity by isobutane equivalent to R134a, the compressor 50 is configured to have a cylinder volume approximately twice as large.

The refrigeration capacity per unit volume of CO ₂ is 11258.5 kJ. In other words, refrigerating capacity per unit volume of isobutane, when compared to CO _2, it is about 1/20. Therefore, in order to make the refrigeration capacity by isobutane equal to CO ₂ , the compressor 50 is configured to have a cylinder volume about 20 times.

Generally, a compressor with a large cylinder volume has a large amount of unbalance inside the compressor. For this reason, the compressor 50 having a large cylinder volume tends to increase vibration. In the present embodiment, since the rigidity of the lower portion of the heat insulation box 21 is improved and the rigidity of the heat insulation box 21 is improved, the compression is performed even when the compressor 50 having a large cylinder volume is mounted. The refrigerator vibration due to the vibration of the machine 50 is suppressed.

Furthermore, a machine room 104 is formed by the lower concave portion 22b, the storage portion 101, and the heat insulating material 24 filled therebetween. The compressor 50 is disposed in the machine room 104. By filling the heat insulating material 24, the rigidity of the machine room 104 is high. Therefore, even when the compressor 50 having a large cylinder volume is mounted, the vibration of the compressor 50 transmitted to the refrigerator is reduced. That is, it is possible to mount the compressor 50 having a large cylinder volume.

As described above, the vacuum heat insulating material 70 is provided closer to the storage chamber than the side refrigerant pipe 52. Thereby, the heat radiated from the side refrigerant pipe 52 is reduced from entering the storage chamber.

In this embodiment, the vacuum heat insulating material 70 is provided at a location facing at least the ice making chamber 30, the first freezing chamber 31, and the second freezing chamber 32. In general, the vacuum heat insulating material 70 has a higher specific gravity than the heat insulating material 24. Therefore, the weight of the refrigerator main body 20 is reduced by reducing the amount of the vacuum heat insulating material 70 used.

On the other hand, when the weight of the refrigerator main body 20 may be increased, the vacuum heat insulating material 70 is provided in many places. Specifically, the vacuum heat insulating material 70 is provided on both side surfaces, the bottom surface, and the back surface of the heat insulating box 21. This further reduces heat penetration into the storage chamber. By reducing the heat intrusion, the power consumption of the refrigerator body 20 is reduced. In addition, the vacuum heat insulating material 70 has higher rigidity than a heat insulating material made of urethane. For this reason, the vacuum heat insulating material 70 has an effect of improving the rigidity of the heat insulating box 21.

The outer box 23 includes a main member 60, a back member 61, and a top member 62. By dividing and manufacturing in this way, each molding process is simplified. On the other hand, there is a concern that the rigidity of the heat insulating box 21 is lowered by dividing it. However, the inventors confirmed that the refrigerator main body 20 is distorted from the vicinity of the bottom surface of the heat insulating box 21 when food is stored in the storage room.

It is presumed that the cause of distortion of the heat insulation box 21 is that the largest force is applied to the upper front side of the heat insulation box 21 by opening and closing the refrigerating compartment door 29a. Since the refrigerator compartment 29 is a storage compartment provided at the uppermost part of the heat insulating box 21, the influence of this force is great.

The refrigerator compartment door 29a is the heaviest among the refrigerator doors. Since the refrigerator compartment door 29a has a door pocket, a heavy object such as a beverage bottle is stored therein. For this reason, when the refrigerator compartment door 29a opens, a large load is applied to the upper hinge 34 and the lower hinge 35 that support the refrigerator compartment door 29a.

In the heat insulation box 21, the lower recessed part 22b which forms the machine room 104 is located on the diagonal line of the refrigerator compartment door 29a where the above big load is applied. As in the present embodiment, by improving the rigidity in the vicinity of the lower recess 22b, bending of the entire refrigerator when the refrigerator compartment door 29a is opened is suppressed.

In this Embodiment, the accommodating part 101 which accommodates the external apparatus exposed to external air among refrigeration cycle related apparatuses is arrange | positioned in the back | inner side lower part of the vegetable compartment 33 which is the lowest storage room of the heat insulation box 21. Is done. Moreover, the heat insulation box 21 has a heat insulation wall in which the bottom part of the vegetable compartment 33 and the bottom part of the storage part 101 are integrally formed. With this configuration, the rigidity in the vicinity of the bottom surface of the heat insulating box 21 is increased.

Moreover, the rigidity of the side wall of the heat insulation box 21 becomes high because the main member 60 is formed by integrating the bottom surface portion 60a and the left and right side surface portions 60b. For this reason, the deformation of the heat insulation box 21 is suppressed for a long time even with a large load of the refrigerator compartment door 29a. Furthermore, since the rigidity in the vicinity of the bottom surface of the heat insulation box 21 is increased, distortion of the heat insulation box 21 is prevented.

In the present embodiment, the main member 60 does not have a notch in the bottom surface portion 60a. However, when a cutout is necessary, it is desirable to provide a cutout in the narrowest possible range and as far as possible in the heat insulation box 21. The front side of the main member 60 supports the refrigerator compartment door 29 a via the upper hinge 34 and the lower hinge 35. By opening and closing the refrigerator compartment door 29a, a forward stress is applied to the refrigerator main body 20. Thereby, the refrigerator main body 20 becomes slightly forward-slip. That is, stress concentrates on the lower part of the front surface of the heat insulating box 21, particularly in the vicinity of the fixing portion of the front support leg 80. Therefore, when providing a cutout in the main member 60, the cutout is provided in the back side of the heat insulation box 21 as much as possible.

In recent years, the refrigerator compartment door 29a is often provided with a food storage unit for storing a beverage bottle or the like called a door pocket. That is, in use, the total weight of the refrigerator compartment door 29a often increases. For this reason, it is necessary to pay more attention to stress concentration due to opening and closing of the refrigerator compartment door 29a.

Here, when the heat insulation box 21 around the refrigerator compartment 29 is deformed, for example, a gap is generated around the engaging portion between the outer box 23 and the refrigerator compartment door 29a. Specifically, a gap is generated between the outer box 23 and the heat insulating material 24 or between the outer box 23 and the inner box 22. In this case, cold air enters the gap, and there is a possibility that dew condensation occurs around the engaging portion between the outer box 23 and the refrigerator compartment door 29a. However, in this Embodiment, since the rigidity of the heat insulation box 21 is high, a deformation | transformation is suppressed. For this reason, generation | occurrence | production of the above dew condensation is suppressed.

The reliability for preventing the refrigerator body 20 from falling to the front side is determined by the position of the front end portion 81 of the front support leg 80 in the front-rear direction. The reliability with respect to the fall prevention is improved as the front end portion 81 protrudes from the front opening 21a. Here, when the front end portion 81 is disposed so as to protrude from the front opening 21a, stress concentrates on the fixing portion of the front support leg 80 due to the lever principle. Therefore, when the front opening 21a is used as a reference surface, the amount of protrusion of the fixed portion of the front support leg 80 toward the back side is equal to or greater than the amount of protrusion of the front end portion 81 forward. It is desirable. On the other hand, as shown in the present embodiment, it is desirable in terms of beauty that the front end portion 81 does not protrude forward from the front surface of the vegetable compartment door 33a.

Similarly, it is desirable that the back side support leg 90 be disposed as far back as possible with respect to the heat insulating box 21. Thereby, the fall to the back side of the refrigerator main body 20 is prevented. On the other hand, when the back side support leg 90 is disposed so as to protrude rearward from the back surface of the heat insulating box body 21, the depth dimension required for installing the refrigerator main body 20 becomes large.

The defrost water treatment of the evaporator 51 will be described. When the operation of the refrigeration cycle is stopped, the frost attached to the evaporator 51 is melted. The defrost water in which the frost has melted flows into the defrost water treatment unit 102. The defrost water treatment unit 102 evaporates the defrost water by using heat from the heat source and wind from the blower. The evaporated defrost water is exhausted from the back side of the defrost water treatment unit 100. Thereby, defrost water does not overflow from the defrost water processing unit 102. The defrost water treatment unit 102 is provided beside the compressor 50. Therefore, the heat radiation from the compressor 50 is used as a heat source for evaporating the defrost water.

¡Defrost water treatment timing is set periodically according to conditions such as continuous operation time of the refrigeration cycle, outside air temperature and humidity. When the interval between the previous defrost water treatment and the next defrost water treatment is short, the amount of frost adhering to the evaporator 51 is small. For this reason, the processing time for evaporating defrost water is set short. Conversely, when this interval is long, the amount of frost that adheres to the evaporator 51 is large. For this reason, the processing time for evaporating defrost water is set long. By setting in this way, the defrost water does not overflow from the defrost water treatment unit 102.

Conventional refrigerators are equipped with a compressor support that supports the compressor. The compressor support base supports the compressor for a long period of time. In order to obtain sufficient rigidity, the compressor support base is formed using a steel plate thicker than the outer box. For this reason, the conventional refrigerator is heavy.

The defrost water treatment unit 100 of the present embodiment is entirely covered with the heat insulating material 24 except for the open surface of the storage unit 101. With this configuration, even if the storage unit 101 is made of resin, sufficient rigidity can be obtained. Therefore, sufficient rigidity can be obtained even when a compressor support such as a conventional refrigerator is not used. That is, since the resin storage unit 101 replaces the conventional compressor support, the weight of the refrigerator main body 20 is reduced.

As described above, the rigidity of the bottom surface of the heat insulating box 21 is greatly improved. In addition, since the bottom surface of the heat insulation box 21 and the side wall are integrally formed, the rigidity of the side wall is greatly improved.

The heat insulating walls around the storage unit 101 that is the outline of the defrost water treatment unit 100 are substantially the same as the heat insulating walls on both the left and right side surfaces and the bottom surface of the vegetable room 33 that are part of the heat insulating wall of the heat insulating box 21. Has a thickness. The heat insulating wall at the bottom of the storage unit 101 is substantially horizontal (including horizontal) with the heat insulating wall on the bottom of the vegetable compartment 33. Further, the heat insulating wall around the storage portion 101 is formed integrally and continuously with the heat insulating wall of the heat insulating box 21. Thereby, even if it is a case where the stress by the load of the foodstuff accommodated in each storage chamber is applied to the heat insulation box 21 on the bottom face part 60a, it is suppressed that a bending point generate | occur | produces in the bottom face part 60a. Therefore, the heat insulation box 21 is not easily distorted, and durability against long-term use is improved.

As described above, the heat insulating box 21 is configured by forming the main member 60 by integrating the bottom surface portion 60a and the left and right side surface portions 60b. Accordingly, the rigidity of the lower portion of the outer box 23 is increased, so that the rigidity of the heat insulating box 21 is increased.

The defrost water treatment unit 100 has a heat insulating wall continuous with the bottom surface 60a of the heat insulating box 21 at the lower part. That is, the heat insulation box 21 does not have a notch in the bottom surface portion 60a. Thereby, the rigidity of the heat insulation box 21 further increases.

The left and right side portions of the defrost water treatment unit 100 have heat insulating walls that are continuous with the left and right side surface portions 60 b of the heat insulating box body 21. That is, the defrost water processing unit 100 and the heat insulating box 21 are connected via the heat insulating material 24. Thereby, the rigidity of the heat insulation box 21 further increases.

The heat insulation wall of the bottom surface portion 60a of the heat insulation box 21 and the heat insulation wall below the defrost water treatment unit 100 are substantially horizontal (including horizontal) and have substantially the same thickness. Thereby, a bending point is hard to generate | occur | produce in the bottom face part 60a of the heat insulation box 21. FIG. For this reason, the rigidity and durability of the heat insulation box 21 are increased. Further, in this configuration, the heat insulating material 24 is uniformly filled. That is, when filling is performed by injecting and foaming the heat insulating material 24 from the back surface of the heat insulating box 21 with the front opening 21a facing downward, the flow of foaming is not hindered. Thereby, the heat insulating material 24 foams uniformly and heat insulation performance improves.

Chamfering areas are provided at the left and right corners on the back side of the heat insulation box 21. The back side support leg 90 of the refrigerator body 20 is provided at a position that does not protrude from the chamfered area. Thereby, the back side support leg 90 can be provided in the back side of the heat insulation box 21 without increasing the depth dimension of the refrigerator main body 20. With this configuration, the refrigerator main body 20 is prevented from falling backward while ensuring the installation of the refrigerator main body 20.

Since the upper side of the front refrigerant pipe 53 is opened, there is no need to arrange a refrigerant pipe passing through the upper surface of the refrigerator main body 20. For this reason, invasion of heat into the storage chamber is reduced. Generally, cold air flows downward in the upper part of the front opening 21a. For this reason, condensation is unlikely to occur in the upper part of the front opening 21a. In particular, in the present embodiment, the storage room located at the top is the refrigerator compartment 29. That is, the difference between the temperature inside the storage room and the temperature of the outside air is small. For this reason, the tendency that condensation does not occur easily is remarkable. Therefore, since it is difficult for dew condensation to occur, it is not necessary to increase the thickness of the heat insulating wall of the heat insulating box 21 in a portion where there is no refrigerant pipe. That is, the capacity of the storage room can be increased.

On the other hand, the lower part of the front opening 21a is close to the installation surface. For this reason, air convection hardly occurs. As a result, condensation is likely to occur in the lower portion of the front opening 21a. In the present embodiment, the side refrigerant pipe 52 and the front refrigerant pipe 53 pass through the bottom surface of the heat insulating box 21. For this reason, generation | occurrence | production of dew condensation in the lower part of the front surface opening part 21a is prevented.

In the case of an electronically controlled refrigerator, the heat generated from the control board can be used by disposing the control board on the upper surface member 62. This more reliably prevents condensation.

Moreover, the occurrence of condensation is not significant on both sides of the refrigerator compartment 29 of the front opening 21a. Accordingly, the front refrigerant pipe 53 is disposed away from the front flange 23a on both sides of the refrigerator compartment 29. Specifically, the front refrigerant pipe 53 is disposed on the heat insulating material 24 side of the main member 60 and at a position of 90 mm from the front surface to the back side. The front refrigerant pipe 53 has an upper part farther from the front surface of the heat insulating box 21 than a lower part. For this reason, the penetration | invasion of the heat | fever to a storage chamber is suppressed, and the dew condensation of the front surface opening part 21a is prevented. When the outer box 23 is made of a steel plate having a thickness of 0.5 mm, the front refrigerant pipe 53 installed at a position of 100 mm from the front opening 21a to the back side has sufficient heat to prevent condensation on the front opening 21a. The inventors confirmed that it was transmitted. Therefore, in this Embodiment, refrigerant | coolant piping is installed in the 90-mm position which is a position within 100 mm from the front opening part 21a to the back | inner side.

In addition, when the side part refrigerant | coolant piping 52 is arrange | positioned in the position of 100 mm in the back | inner side from the front opening part 21a, the upper part of the front refrigerant | coolant piping 53 can be abolished. That is, the total length of the refrigerant pipe is further shortened.

When it is difficult for condensation on both sides of the refrigerator compartment 29 to occur, the upper part of the front refrigerant pipe 53 can be eliminated. The upper surface of the refrigerator compartment 29 faces the bottom surface portion 60a. Energy consumption can be reduced by providing an integrally formed heating element at a location other than the top surface. In this case, energy consumption is further reduced by forming the front refrigerant | coolant piping 53 folded in the partition wall 25 with the side refrigerant | coolant piping 52 in one.

In the above case, since the side refrigerant pipe 52 and the front refrigerant pipe 53 are shortened, the heat radiation amount is reduced. By disposing the condenser outside the heat insulating box 21, the reduced heat dissipation can be compensated. By disposing the condenser outside the heat insulating box 21, a necessary heat radiation amount can be ensured without increasing the heat intrusion into the storage chamber.

In addition, as a structure which abolishes the upper part of the front refrigerant | coolant piping 53, there exists a structure which equips the peripheral edge of the front opening part 21a of the inner box 22 with the front refrigerant | coolant piping 53. However, in this configuration, the distance between the storage chamber and the refrigerant pipe is very close. That is, heat penetration into the storage chamber increases.

The front refrigerant pipe 53 is disposed on the heat insulating material 24 side of the inner flange 23c of the front flange 23a. Thereby, since the front refrigerant | coolant piping 53 contacts the front flange 23a, dew condensation is prevented. In this configuration, since the distance from the refrigerant pipe to the storage chamber is long, intrusion of heat into the storage chamber is reduced.

The front refrigerant pipe 53 is disposed while being in contact with the front flange 23a, and is then disposed away from the front opening 21a. That is, the front refrigerant pipe 53 is separated from the front flange 23a in the middle of the path. In the above configuration, when the front refrigerant pipe 53 is separated from the front flange 23a, it is not necessary to provide a notch in the inner flange 23c. Since there is no notch, when the heat insulating material 24 is foamed and filled, the possibility that the heat insulating material 24 leaks is reduced. Further, the front refrigerant pipe 53 is prevented from being damaged by the front refrigerant pipe 53 coming into contact with the notch.

The upper part of the front refrigerant pipe 53 is formed with an open end. The main member 60 is formed integrally with a bottom surface portion 60a and left and right side surface portions 60b with the upper side of the heat insulating box 21 being an open end. Since the front refrigerant pipe 53 and the main member 60 are both formed with the open ends on the upper side, the refrigerator main body 20 can be easily assembled.

As described above, in the present embodiment, the front refrigerant pipe 53 is formed integrally with at least a part of the side surface portion 60b of the outer box 23 and the bottom surface portion 60a. This eliminates the need to provide a heating element above the front opening 21a. Furthermore, since heat intrusion into the storage room is reduced, the amount of power consumption is reduced. Moreover, it is not necessary to provide a heating element such as a heater by using the refrigerant pipe as the heating element. That is, it is not necessary to supply power to the heater, and the power consumption is further reduced.

In the heat insulation box 21, the storage room located at the top is a refrigerator room 29. The cooling temperature of the refrigerator compartment 29 is a refrigerator temperature zone. Therefore, even if the heating element is not provided on the upper surface of the heat insulating box 21, condensation is prevented. That is, power consumption is reduced.

The front refrigerant pipe 53 is disposed on the heat insulating material 24 side of the inner flange 23c of the front flange 23a. By contacting the front refrigerant pipe 53 with the front flange 23a, condensation is prevented and the distance from the refrigerant pipe to the storage chamber is increased. Thereby, the penetration | invasion of the heat to a store room is reduced. That is, dew condensation is prevented and power consumption is reduced.

The upper part of the front refrigerant pipe 53 is disposed on the back side from the front opening 21a at a position of 90 mm, which is a position within 100 mm. Thereby, the length of the front refrigerant | coolant piping 53 which contacts the front flange 23a becomes short. On the other hand, a large amount of heat enters the storage chamber from the front refrigerant pipe 53 that contacts the front flange 23a. Therefore, the heat intrusion into the storage room is reduced, and the power consumption is reduced.

(Embodiment 2)
FIG. 6 is a cross-sectional view of the refrigerator in the second embodiment of the present invention. FIG. 6 is a cross-sectional view of the refrigerator as viewed from the right side. FIG. 7 is an exploded perspective view of the heat insulating box of the refrigerator according to the present embodiment. In the present embodiment, the same reference numerals are used for the same configurations as those in the first embodiment.

As shown in FIGS. 6 and 7, the heat insulating box 201 of the refrigerator main body 200 includes a resin inner box 202, a metal magnetic outer box 203, and a heat insulating material 24 filled therebetween. Composed. A heat insulating wall is formed by the inner box 202, the outer box 203, and the heat insulating material 24. The heat insulation box 201 has a front opening 201a on the front surface. The heat insulation box 201 has a top surface storage portion 201b which is a heat insulation box recess in the upper part on the back side.

The outer box 203 includes a main member 260, a top front member 262, a top back member 213, and a back member 261. The main member 260 is formed by integrating the bottom surface portion 260a and the left and right side surface portions 260b. The upper surface front side member 262 forms the front side of the upper surface of the outer box 203. The upper surface back side member 213 is made of resin and forms a top surface storage portion 201b which is a heat insulating box recess. The back member 261 forms the back of the outer box 203, that is, the back surface of the refrigerator main body 200.

The compressor 220 constituting the refrigeration cycle is supported by the upper surface back side member 213. That is, the compressor 220 is accommodated in the top surface accommodating part 201b which is a heat insulation box recessed part.

The upper surface back side member 213 has a box shape with the upper surface and the back surface opened. The upper surface rear side member 213 is formed so as to face the upper concave portion 202 a provided at the upper side of the inner box 202. A space between the front surface and the bottom surface of the upper surface back side member 213 and the inner box 202 is filled with a heat insulating material 24. Furthermore, the heat insulating material 24 is filled between the left and right side surfaces of the upper surface back side member 213 and the left and right side surface portions 260 b of the main member 260.

The defrost water treatment unit 230 is provided in the lower part on the back side of the heat insulation box 201. Specifically, a resin storage portion 231 is mounted in a hole formed in the lower portion of the back member 261. The storage unit 231 is open on the back side and stores external devices that are exposed to the outside air among the refrigeration cycle-related devices. A defrost water treatment unit 232 that is an external device is provided inside. The storage unit 231 and the defrost water treatment unit 232 constitute a defrost water treatment unit 230.

A lower recess 202b is formed in the lower part of the back side of the vegetable chamber 33, that is, the lower part of the inner side of the inner box 202. The lower recessed part 202b is formed corresponding to the shape of the storage part 231 that is an outline of the defrosting water treatment part 230. A space between the lower recess 202b and the storage portion 231 is filled with the heat insulating material 24. The heat insulating material 24 is also filled between the left and right side surfaces and the bottom surface of the storage portion 231 and the main member 260. In this way, a heat insulating wall around the storage portion 231 is formed. The heat insulation walls around the storage portion 231 have substantially the same thickness as the heat insulation walls on the left and right side surfaces and the bottom surface of the vegetable room 33. The heat insulation wall at the bottom of the storage portion 231 is substantially horizontal (including horizontal) with the heat insulation wall on the bottom surface of the vegetable compartment 33. The heat insulation wall around the storage portion 231 is formed continuously and integrally with the heat insulation wall of the heat insulation box 201.

When a foam heat insulating material is used as the heat insulating material 24, the heat insulating material 24 is filled between the inner box 202 and the outer box 203, and at the same time, the heat insulating material 24 is filled around the storage portion 231. By doing so, the rigidity of the heat insulating box 201 is increased.

The operation and action of the refrigerator configured as described above will be described. As described in Embodiment 1, the rigidity of the heat insulating box 201 is affected by the rigidity of the bottom surface portion 260a. The heat insulation box 201 has a top surface storage portion 201b which is a heat insulation box recess for disposing the compressor 220, not on the bottom surface portion 260a but on the upper back side of the uppermost storage chamber of the heat insulation box 201. Therefore, as compared with the case where the compressor 220 is stored in the storage unit 231 at the bottom on the back side, the space volume of the storage unit 231 at the bottom on the back side is small. Furthermore, since the compressor 220 that is a vibration source is not housed, the rigidity of the heat insulating box 201 is hardly lowered.

The compressor 220 and the open ends of the side refrigerant pipe 52 and the front refrigerant pipe 53 are both positioned above the heat insulating box 201. With this configuration, waste of a route for reciprocating the refrigerant pipe is reduced as compared with the case where the compressor is disposed below. That is, the side refrigerant pipe 52 and the front refrigerant pipe 53 can be shortened. For this reason, invasion of heat into the storage chamber is reduced.

The compressor 220 and the defrost water treatment unit 230 are separately disposed above and below the heat insulation box 201. In Embodiment 1, the compressor 50 and the defrost water treatment unit 100 are both disposed in the storage unit 101. Accordingly, the lower recess 202b and the storage portion 231 in the present embodiment can be made smaller than the lower recess 22b and the storage portion 101 in the first embodiment.

As described above, the compressor 220 is disposed in the top surface storage portion 201b at the upper rear side of the refrigerator body 200. Thereby, the lower recessed part 202b and the accommodating part 231 of the back | inner side lower part of the heat insulation box 201 can be made small. As a result, the rigidity of the heat insulating box 201 is increased.

Since the compressor 220 is disposed on the upper back side of the refrigerator main body 200, the waste heat of the compressor 220 can be circulated to the upper surface of the refrigerator main body 200. Thereby, dew condensation on the upper surface of the refrigerator body 200 is prevented. There is no need to separately provide a heating element for preventing condensation on the upper surface. Therefore, the heat insulation wall on the upper surface of the heat insulation box 201 can be thinned, and the volume of the storage chamber can be increased.

The side refrigerant pipe 52 and the front refrigerant pipe 53 have an open end on the upper side of the heat insulation box 201. Therefore, it is possible to consolidate the welded portions of the piping into the top surface storage portion 201b which is a heat insulating box recess without extending the piping. For this reason, workability at the time of manufacture improves.

(Embodiment 3)
FIG. 8 is a cross-sectional view of the refrigerator in the third embodiment of the present invention. FIG. 9 is a cross-sectional view showing another configuration of the refrigerator according to the present embodiment. 8 and 9 are cross-sectional views of the refrigerator as viewed from the right side. In the present embodiment, the same reference numerals are used for the same configurations as those in the first embodiment. In addition, configurations and technical ideas that do not hinder the application of the first and second embodiments in combination can be applied in combination.

As shown in FIGS. 8 and 9, the heat insulating box body 301 of the refrigerator main body 300 includes a resin inner box 302, a metal magnetic outer box 303, and a heat insulating material 24 filled therebetween. Composed. A heat insulating wall is formed by the inner box 302, the outer box 303, and the heat insulating material 24. The heat insulation box 301 has a front opening 301a on the front surface.

The outer box 303 includes a main member 360, a top front member 362, and a back member 361. The main member 360 is formed by integrating the bottom surface portion 360a and the left and right side surface portions.

The heat insulation box 301 has a top surface storage portion 301b that is a heat insulation box recess for disposing the compressor 220. The top surface storage portion 301b is disposed not on the bottom surface portion 360a of the heat insulating box body 301 but on the upper back side of the uppermost storage chamber of the heat insulating box body 301.

The heat insulation box 301 includes a back member 361 that forms the back surface of the heat insulation box 301, a top front member 362 that forms the top surface of the heat insulation box 301, and a top surface that forms the back and bottom surfaces of the top surface storage portion 301b. A rear member 313.

The control board 358 is disposed at a position lower than the compressor 220. The storage portion of the control board 358 is formed by the upper surface back side member 313. The upper surface back side member 313 is formed of a metal plate.

The upper surface back side member 313 has a box shape with an upper surface and a back surface opened. The upper surface rear side member 313 is formed to face the top surface storage portion 301 b provided at the upper side of the inner box 302. The upper surface back side member 313 is formed by integrating a back surface member 361 and an upper surface front side member 362. The heat insulating box 301 is configured by filling the heat insulating material 24 between the inner box 302 and the outer box 303.

As shown in FIG. 8, in addition to the compressor 220 supported by the compressor support portion 313a, a control board 358, which is an external device exposed to the outside air among the refrigeration cycle related devices, is provided on the upper surface rear side member 313. Stored. Even in such a case, the heat insulating box 301 has higher rigidity on the upper side in addition to the bottom surface.

Further, since the upper surface back side member 313 is formed of a metal plate, the rigidity of the heat insulating box 301 is further increased. Thereby, durability of the refrigerator main body 300 improves.

In the configuration of FIG. 8, the compressor 220 having a large weight is disposed above. Thereby, the center of gravity of the refrigerator main body 300 is on the back side. The upper surface back side member 313 is formed of a metal plate having a specific gravity greater than that of the resin. Thereby, even if the center of gravity of the refrigerator main body 300 is on the back side, the refrigerator main body 300 is prevented from falling to the front side. That is, the safety of the refrigerator is improved.

By filling the lower surface of the compressor support part 313a with the heat insulating material 24 continuous with the heat insulation box body 301, the rigidity of the heat insulation box body 301 is increased together with the rigidity of the lower surface of the compressor support part 313a. Thereby, durability of the refrigerator main body 300 improves. In the present embodiment, a step is provided in the top surface storage portion 301b. In addition to the compressor 220, a control board 358 is accommodated in this step. Even with such a configuration, the rigidity of the top surface storage portion 301b is increased.

On the other hand, FIG. 9 shows a configuration in which a compressor 220 and a control board 358 are arranged below as another configuration of the refrigerator of the present embodiment. In this configuration, the storage portion 331 is provided with a step.

Inside the storage unit 331, a defrost water treatment unit 330 and a compressor 220 are disposed. Further, a step is provided above the defrosting water treatment unit 330 and the compressor 220, and a control board 358 is disposed. The heat insulation box 301 includes a back member 361 that forms the back surface of the heat insulation box 301, a top front member 362 that forms the top surface of the heat insulation box 301, and a bottom surface that forms a machine room at the bottom on the back side of the storage unit 331. Side member 323.

The control board 358 is disposed at a position higher than the compressor 220. The storage portion of the control board 358 is formed by the lower surface back side member 323. The lower surface back side member 323 is formed in a step shape by a metal plate.

The lower back member 323 has a box shape with an open rear surface. The lower surface back side member 323 is formed by integrating the back surface member 361 and the upper surface front side member 362. The heat insulating box 301 is configured by filling the heat insulating material 24 between the inner box 302 and the outer box 303. As described above, even when the storage portion 331 is provided with a step and the control board 358 is stored in addition to the compressor 220, the rigidity of the storage portion 331 is increased.

(Embodiment 4)
FIG. 10 is a cross-sectional view of the refrigerator in the fourth embodiment of the present invention. FIG. 10 is a cross-sectional view of the refrigerator as viewed from the right side. FIG. 11 is an exploded perspective view of the heat insulating box of the refrigerator according to the present embodiment. In the present embodiment, the same reference numerals are used for the same configurations as in the first to third embodiments. Further, regarding the same configuration as in the first to third embodiments, the same operational effects are obtained, and thus the description thereof is omitted. The present embodiment is different from the second embodiment in that the control board 458 is disposed at a position lower than the compressor 220.

As shown in FIGS. 10 and 11, the heat insulating box 401 of the refrigerator main body 400 includes an inner box 202, an outer box 403, and a heat insulating material 24 filled between them, as in the second embodiment. Composed. The heat insulation box 401 has a top surface storage portion 401b which is a heat insulation box recess in the upper part on the back side. That is, the heat insulation box 401 has high rigidity.

The outer box 403 includes a main member 260, an upper surface front side member 262, an upper surface back side member 413, and a back surface member 461. The upper surface back side member 413 is made of resin and has a shape in which the upper surface and the back surface are open. The upper surface rear side member 413 is formed so as to face the upper concave portion 202 a formed in the upper portion on the inner side of the inner box 202. The heat insulating material 24 is filled between the upper surface back side member 413, the inner box 202, and the main member 260. In this way, the top surface storage portion 401b is formed.

The upper surface back side member 413 has a compressor support part 413a and a flange part 413b extending downward from the compressor support part 413a. A control board housing portion 413c is formed at the center in the left-right direction of the flange portion 413b. The compressor 220 is supported by the compressor support portion 413a. A control board 458 for controlling the operation of the refrigerator main body 400 is housed in the control board housing portion 413c.

A vacuum heat insulating material 70 is provided in a portion of the side refrigerant pipe 52 facing at least the ice making chamber 30, the first freezing chamber 31, and the second freezing chamber 32. The vacuum heat insulating material 70 is fixed to the heat insulating material 24 side of the main member 260 with the side refrigerant pipe 52 interposed therebetween. The vacuum heat insulating material 70 in the present embodiment has a specific gravity larger than that of the heat insulating material 24 and has a low thermal conductivity.

The vacuum heat insulating material 70 has a lower area or thickness greater than the upper area or thickness from the center of the heat insulating box 401 in the vertical direction. The center in the vertical direction of the heat insulating box 401 is the vertical center of the partition wall 25 as indicated by the lower end surface 29b of the refrigerator compartment 29 or the one-dot chain line 25a in FIG.

The compressor cover 423 covers the upper surface and the back surface of the upper surface back side member 413. The compressor cover 423 has an exhaust port 423a at a position corresponding to the outer side in the left-right direction of the control board housing portion 413c of the upper surface back side member 413.

The compressor support in the conventional refrigerator supports the compressor for a long time. Therefore, the conventional compressor support base is formed using a steel plate thicker than the outer box in order to obtain sufficient rigidity. For this reason, the conventional refrigerator is heavy. In the present embodiment, the upper surface back side of the refrigerator main body 400 is configured by filling the heat insulating material 24 between the upper surface back side member 413 and the inner box 202. With this configuration, sufficient rigidity can be obtained, and a heavy steel plate compressor support is unnecessary. Moreover, since the control board accommodating part 413c is integrally molded, a separate configuration for accommodating the control board is not necessary. Furthermore, the upper surface back side member 413 is made of resin. Therefore, the number of parts and the weight of the refrigerator are reduced. Thereby, workability | operativity at the time of assembling a refrigerator improves. In particular, since the weight in the upper part of the refrigerator is reduced, it is difficult to overturn.

The compressor 220 is supported by the compressor support portion 413a. The control board 458 is accommodated in a control board accommodation part 413c located below the compressor support part 413a. That is, the control board 458 is disposed at a position lower than the compressor 220. Since warm air rises, the control board 458 is not warmed by exhaust heat from the compressor 220. That is, the temperature rise of the control board 458 is suppressed.

In this embodiment, isobutane is used as the refrigerant. Isobutane is flammable and has a higher specific gravity than air. The compressor cover 423 has an exhaust port 423 a outside the control board 458 in the left-right direction. That is, there is no exhaust port 423a immediately above the control board 458. For this reason, even if the flammable refrigerant leaks, the refrigerant flows down through the side of the control board 458. For this reason, the contact of the refrigerant with the control board 458 is suppressed.

In the present embodiment, the control board 458 is disposed at the center in the left-right direction of the heat insulation box 401, and the exhaust ports 423a are formed on both sides of the control board 458. On the other hand, the control board 458 can be disposed close to one side of the heat insulating box 401. In this case, the exhaust port 423a can be formed on one side with respect to the control board 458. Further, by providing a ventilation mechanism such as a fan next to the compressor 220, it is possible to flow air from the control board 458 side to the exhaust port 423a side. With this configuration, the contact of the refrigerant with the control board 458 is further suppressed, and the temperature rise of the compressor 220 is suppressed.

The vacuum heat insulating material 70 is disposed between the side refrigerant pipe 52 and the storage chamber. This greatly reduces the heat radiated from the side refrigerant pipe 52 from entering the storage chamber.

The top surface storage unit 401 b is located at the top of the heat insulation box 401. By arranging the compressor 220, the condenser, the piping, and the like in the top surface storage unit 401b, the position of the center of gravity of the refrigerator main body 400 is increased. In particular, the compressor 220 has a large weight among the components constituting the refrigerator main body 400. For this reason, the refrigerator main body 400 easily falls. In the present embodiment, the vacuum heat insulating material 70 has a lower area or thickness than the upper area or thickness from the center of the heat insulating box 401 in the vertical direction. Therefore, since the center of gravity of the refrigerator body 400 moves downward, the refrigerator body 400 is prevented from falling.

The vacuum heat insulating material 70 is made of an inorganic material. The density of the vacuum heat insulating material 70 is 200 to 250 kg / m ³ . The heat insulating material 24 is configured by a foam heat insulating material such as urethane. The density of the heat insulating material 24 is 20 to 50 kg / m ³ . Therefore, the vacuum heat insulating material 70 has a density four times or more that of the heat insulating material 24.

It has been described that the refrigerator compartment door 29a is a rotary door type, and the ice making room door 30a, the first freezer compartment door 31a, the second freezer compartment door 32a, and the vegetable compartment door 33a are a drawer type. On the other hand, when the ice making door 30a, the first freezer compartment door 31a, the second freezer compartment door 32a, and the vegetable compartment door 33a are of the revolving door type, they are accompanied by opening and closing of the door as compared with the case of the drawer type. The change in the center of gravity position of the refrigerator main body 400 is small. That is, the refrigerator body 400 is further prevented from falling by making the door a revolving door type.

The compressor 220 is disposed on the back side of the heat insulating box 401. That is, the weight on the back side is increased as compared with the front side of the refrigerator main body 400. Thereby, possibility that the refrigerator main body 400 will fall to the front side, ie, a user's direction, is reduced.

The compressor 220 is disposed in a top surface storage portion 401 b formed at the upper back of the heat insulating box 401. Thereby, the opening height of the refrigerator compartment 29 equivalent to the past is ensured without increasing the height of the refrigerator main body 400. In other words, usability is not impaired. The upper part on the back side of the refrigerator compartment 29 is a place that is difficult for the user to reach. Therefore, even if the upper recessed portion 202a of the inner box 202 protrudes to the inside of the refrigerator compartment 29, the usability is not impaired.

As described above, in the present embodiment, the compressor support portion 413a and the control board housing portion 413c are integrally formed to constitute the upper surface back side member 413. Thereby, the number of parts of the refrigerator main body 400 is reduced. Moreover, the refrigerator main body 400 can be easily assembled.

The control board 458 is disposed at a position lower than the compressor 220. Thereby, the temperature rise of the control board 458 due to the exhaust heat of the compressor 220 is prevented. That is, the reliability of the refrigerator main body 400 is improved.

The heat insulation box 401 includes an upper surface back side member 413, an outer box 403, an inner box 202, and a heat insulating material 24 filled therebetween. With this configuration, the compressor 220 is supported. Moreover, the upper surface back side member 413 is comprised with the resin material. That is, the strength for supporting the compressor 220 is ensured, and the upper portion of the refrigerator main body 400 is reduced in weight. Thereby, the fall of the refrigerator main body 400 is prevented, and safety is improved.

The vacuum heat insulating material 70 whose specific gravity is larger than that of the heat insulating material 24 is arranged more below the center of the heat insulating box 401 in the vertical direction. Thereby, since the center of gravity of the refrigerator main body 400 moves downward, the refrigerator main body 400 is prevented from falling.

The exhaust port 423a of the compressor cover 423 is formed on the outer side in the left-right direction of the control board housing portion 413c. As a result, even if isobutane, which is a flammable refrigerant, leaks, isobutane has a greater specific gravity than air, so that isobutane is prevented from flowing into the control board housing portion 413c. That is, the safety of the refrigerator main body 400 is ensured.

The compressor 220 is disposed in a top surface storage portion 401 b formed at the upper back of the heat insulating box 401. Thereby, the area of the front opening 201a equivalent to the conventional one is ensured without increasing the height of the refrigerator main body 400. That is, usability is not impaired.

(Embodiment 5)
FIG. 12 is a cross-sectional view of the refrigerator in the fifth embodiment of the present invention. FIG. 12 is a cross-sectional view of the refrigerator as viewed from the right side. FIG. 13 is an exploded perspective view of the heat insulating box of the refrigerator according to the present embodiment. In the present embodiment, the same reference numerals are used for the same configurations as in the first to fourth embodiments. Further, regarding the same configuration as in the first to fourth embodiments, since the same function and effect are obtained, the description thereof is omitted. The present embodiment is different from the fourth embodiment in that the control board 458 is disposed at a position higher than the compressor 220.

The outer box 503 includes a main member 260, an upper surface front side member 262, an upper surface back side member 513, and a back surface member 561. The upper surface back side member 513 is made of resin and has a shape in which the upper surface and the back surface are open. The upper surface back side member 513 is formed so as to face the upper concave portion 202 a formed in the upper part on the back side of the inner box 202. The heat insulating material 24 is filled between the upper surface back side member 513, the inner box 202, and the main member 260. In this way, the top surface storage portion 501b which is a heat insulating box recess is formed.

The upper back member 513 has a double bottom structure. The upper surface back side member 513 has a compressor support portion 513a on the lower bottom surface. The upper surface back side member 513 has a control board housing portion 513c on the upper bottom surface. The compressor 220 is supported by the compressor support portion 513a. The control board 458 is disposed in the control board housing part 513c. Thus, the compressor 220 and the control board 458 are arrange | positioned at the top | upper surface accommodating part 501b.

The compressor cover 523 covers the upper surface and the back surface of the upper surface back side member 513. The compressor cover 523 has an exhaust port 523 a at a position on the back side of the refrigerator main body 500.

As the refrigerant, isobutane is used. Isobutane is a flammable gas. Isobutane has an explosion limit in the air of 1.8 to 8.4 vol%. Isobutane has an ignition temperature of 460 ° C. For this reason, when isobutane leaks and flows into the control board 458, the isobutane may come into contact with the spark generated on the control board 458.

On the other hand, isobutane has a higher specific gravity than air. The control board housing portion 513c is located on the upper bottom surface of the upper surface back side member 513. That is, the control board 458 is located above the compressor 220. Therefore, even if isobutane leaks, it is difficult for isobutane to flow into the control board 458. That is, the safety of the refrigerator main body 500 is ensured.

The compressor 220 is located under the control board housing part 513c. Here, by providing the control board housing part 513c with a sheet-like heat insulating material, it is reduced that the exhaust heat of the compressor 220 is transmitted to the control board housing part 513c. That is, the temperature rise of the control board 458 is suppressed. Further, by filling the heat insulating material 24 inside the upper bottom surface of the upper surface back side member 513, a heat insulating effect can be further obtained without increasing the number of parts.

When the control board 458 is disposed at a position deviated in the left-right direction instead of directly above the compressor 220, the distance between the control board 458 and the compressor 220 is increased. As a result, heat conduction from the compressor 220 to the control board 458 is reduced. Furthermore, since the space in the vertical direction of the top surface storage unit 501b is effectively used, the volume of the storage chamber can be increased by reducing the upper recess 202a.

The cover of the control board 458 is formed integrally with the compressor cover 523. For this reason, the number of parts of the refrigerator main body 500 is reduced. Further, the refrigerator main body 500 can be easily assembled.

The compressor cover 523 can be configured to be a plug-in type from above with respect to the back surface of the refrigerator main body 500. In this case, the compressor cover 523 is fixed by screws from above after being inserted into the heat insulating box 501. That is, the compressor cover 523 is attached and detached only from the top. The refrigerator main body 500 is often installed close to the rear wall. With this configuration, when the control board 458 fails, maintenance can be performed without moving the refrigerator main body 500 forward.

Isobutane used as a refrigerant is flammable and has a higher specific gravity than air. When the refrigerant leaks from the compressor 220 or the welded portion around the compressor 220, the refrigerant is discharged from the exhaust port 523a to the rear of the refrigerator main body 500. For this reason, it is suppressed that a refrigerant | coolant flows into the control board accommodating part 513c. That is, the safety of the refrigerator main body 500 is improved.

(Embodiment 6)
FIG. 14 is a cross-sectional view of the refrigerator in the sixth embodiment of the present invention. FIG. 14 is a cross-sectional view of the refrigerator as viewed from the right side. FIG. 15 is an exploded perspective view of the heat insulating box of the refrigerator according to the present embodiment. In the present embodiment, the same reference numerals are used for the same configurations as in the first to fifth embodiments. Further, regarding the same configuration as in the first to fifth embodiments, since the same function and effect are obtained, the description thereof is omitted. In the present embodiment, the configuration of the upper portion of the heat insulating box 601 is different from those of the second to fifth embodiments.

The outer box 603 includes a main member 260, an upper surface member 662, and a back member 661. The configuration of the upper surface member 662 will be described in detail later. The heat insulating material 24 is filled between the outer box 603 and the inner box 602. Thus, the heat insulation box 601 is comprised.

As shown in FIG. 15, the upper surface member 662 is made of resin and has a shape in which the upper and left and right sides are opened. As shown by the alternate long and short dash line in FIG. 15, the upper surface member 662 is arranged so that the position in the height direction of the upper end of the upper surface member 662 matches the position in the height direction of the upper end of the main member 260. It is disposed between the left and right side portions 260b.

The upper surface member 662 has a compressor support portion 613a on the bottom surface on the back side. The compressor 220 is supported by the compressor support portion 613a. The upper surface member 662 has a control board housing portion 613c on the front side. A control board 458 is disposed in the control board housing portion 613c. The upper surface member 662 includes a partition plate 662c between the compressor support portion 613a and the control board housing portion 613c. The height of the partition plate 662c is at least higher than the welding position of the compressor 220. A condenser 669 is disposed on the upper surface member 662 closer to the compressor 220 than the partition plate 662c. In this way, the inside of the upper surface member 662 constitutes the machine room 604.

A fan 611 is disposed on the partition plate 662c. The fan 611 flows the air inside the upper surface member 662, that is, the air in the machine room 604 from the front to the rear.

The refrigerator main body 600 has an operation unit (not shown) for the user to perform temperature setting and the like. The operation portion is disposed in a front recess 662d provided on the front surface of the upper surface member 662. The operation unit is connected to the control board 458.

The air inlet 662e is formed on the front surface of the upper surface member 662 on the left and right outer sides of the front recess 662d. An exhaust port 662 f is formed on the back surface of the upper surface member 662.

The upper surface member 662 is joined to the inner box 602 through the front member 612. The front member 612 is made of a metal magnetic material such as a steel plate. With this configuration, the gasket 38 is in close contact with the front opening 201a over the entire circumference. Therefore, each storage chamber is sealed.

In the present embodiment, the upper surface member 662 is made of resin. On the other hand, the upper surface member 662 can be integrally formed of a metal magnetic body such as a steel plate together with the front surface member 612. In this case, the number of parts of the refrigerator main body 600 is reduced and the assembly is facilitated.

The refrigerator main body 600 has a plate-shaped machine room cover 623. The machine room cover 623 covers the upper surface of the machine room 604. A vent 623a is formed in the machine room cover 623 as necessary.

The control board 458 is disposed above the front side of the refrigerator main body 600. Thereby, when exchanging control board 458 etc., work can be performed from the front side of refrigerator body 600. That is, maintenance becomes easy. The control board 458 is directly connected to the operation unit. For this reason, the number of parts of the refrigerator main body 600 is reduced and the assembly is facilitated.

In the present embodiment, the operation unit is disposed inside the front recess 662d of the upper surface member 662. On the other hand, the operation unit can be disposed on the front surface of the refrigerator compartment door 29 a or on the wall surface inside the refrigerator compartment 29. In this case, the operation unit is disposed at a position considering user's usability. Specifically, the operation unit is disposed at a position higher than the center line 25a of the partition wall 25 and at a position close to the front surface of the refrigerator main body 600 or the front opening 201a. In any of the above positions, the distance from the control board 458 disposed on the upper front side of the heat insulating box 601 is small. That is, the wiring and configuration can be simplified.

The compressor 220 is disposed at the back of the refrigerator main body 600. The control board 458 is disposed in front of the refrigerator main body 600. With this configuration, the distance between the compressor 220 and the control board 458 is large. Therefore, the influence of the exhaust heat from the compressor 220 received by the control board 458 is small. That is, the temperature rise of the control board 458 is suppressed. For this reason, the reliability of the control board 458 is improved.

Since the inside of the upper surface member 662 becomes the machine room 604, the entire upper surface of the heat insulating box 601 becomes the machine room 604. Therefore, regardless of the position of the heat insulating box 601 where the side refrigerant pipe 52 and the front refrigerant pipe 53 are arranged, the pipe is extended straight up and introduced into the machine room 604. Can do. That is, the shape of the piping or the like can be simplified. Furthermore, assembly such as pipe connection is facilitated.

In the present embodiment, the upper surface member 662 has a shape in which the upper and left and right sides are open. That is, in the machine room 604, the bottom surface, the front surface, and the back surface are integrally formed. On the other hand, a box-shaped machine room 604 can be mounted on the planar upper surface member 662. With this configuration, interior components such as the compressor 220, the control board 458, the condenser 669, and the fan 611 can be disposed in the machine chamber 604 in advance. By using the machine room 604 in which the interior parts are arranged in advance, the refrigerator main body 600 can be easily assembled. In this configuration, when a dew condensation prevention device different from the side refrigerant pipe 52 and the front refrigerant pipe 53 is provided in the heat insulation box body 601, and the condenser constituting the refrigeration cycle is only the condenser 669, the heat insulation box body The welding work between 601 and the machine room 604 becomes unnecessary. This further facilitates assembly of the refrigerator main body 600.

The upper surface member 662 forms the entire upper surface of the heat insulating box 601. The front member 612 is configured as a member different from the top member 662. For this reason, the front member 612 can be made smaller than the configuration using the upper surface front member 262 in the fourth embodiment. In general, the appearance of the front member 612 is important. For this reason, the front member 612 is subjected to processing such as painting. That is, the front member 612 has a higher material cost than a member such as the back member 661 that is not visible to the user. Accordingly, the manufacturing cost is reduced because the area of the front member 612 is small.

As the refrigerant, isobutane is used. Isobutane is flammable and has a higher specific gravity than air. The height of the partition plate 662 c is higher than the welding position of the compressor 220. Therefore, even if the refrigerant leaks, the refrigerant is prevented from flowing into the control board housing portion 613c. That is, the safety of the refrigerator main body 600 is ensured.

The fan 611 disposed on the partition plate 662c causes air to flow from the control board housing portion 613c to the compressor support portion 613a. Thereby, it is further prevented that the refrigerant flows into the control board housing portion 613c. Moreover, the temperature rise of the compressor 220 is suppressed by this wind. That is, the reliability of the compressor 220 is improved.

As described above, since the control board 458 is disposed in front of the compressor 220, the maintainability of the refrigerator main body 600 is improved and the assembly is facilitated. The machine room 604 is disposed on the entire upper surface of the heat insulating box 601. Thereby, the shape of the component which goes in and out of the machine room 604 can be simplified. Therefore, the refrigerator main body 600 can be easily assembled.

(Embodiment 7)
FIG. 16 is a cross-sectional view of the refrigerator in the seventh embodiment of the present invention. FIG. 16 is a cross-sectional view of the refrigerator as viewed from the right side. FIG. 17 is an exploded perspective view of the heat insulating box of the refrigerator according to the present embodiment. In the present embodiment, the same reference numerals are used for the same configurations as in the first to sixth embodiments. Further, regarding the same configuration as in the first to sixth embodiments, since the same function and effect are obtained, the description thereof is omitted. The present embodiment is different from the sixth embodiment in that the bottom surface on the back side of the upper surface member 762 is configured to be lower than the bottom surface on the front side.

The outer box 703 includes a main member 260, an upper surface member 762, and a back member 661. The configuration of the upper surface member 762 will be described in detail later. The heat insulating material 24 is filled between the outer box 703 and the inner box 702. Thus, the heat insulation box 701 is comprised.

As shown in FIG. 17, the upper surface member 762 is made of resin and has a shape in which the upper and left and right sides are opened. As shown by the alternate long and short dash line in FIG. 17, the upper surface member 762 is placed in the outer box 703 so that the position in the height direction of the upper end of the upper surface member 762 matches the position in the height direction of the upper end of the main member 260. Arranged.

The upper surface member 762 has a compressor support portion 713a on the bottom surface on the back side. The compressor 220 is supported by the compressor support portion 713a. The upper surface member 762 includes a control board housing portion 713c on the front side. A control board 458 is disposed in the control board housing portion 713c. Further, when the upper surface member 762 compares the bottom surface on the back side with the bottom surface on the front side, the bottom surface on the back side is configured to be low. That is, the compressor 220 is disposed at a position lower than the control board 458. In this way, the inside of the upper surface member 762 constitutes the machine room 704.

The air inlet 762e is formed on the front surface of the upper surface member 762 on the left and right outer sides of the front surface recess 762d. An exhaust port 762 f is formed on the back surface of the upper surface member 762. The refrigerator main body 700 has a plate-like machine room cover 623 as in the sixth embodiment. The machine room cover 623 covers the upper surface of the machine room 704. A vent 623a is formed in the machine room cover 623 as necessary. Isobutane is used as the refrigerant. Isobutane is flammable and has a higher specific gravity than air.

With the above configuration, the compressor 220 is disposed at a position lower than the control board 458. Therefore, even if the refrigerant leaks, the refrigerant is prevented from flowing into the control board 458. That is, the safety of the refrigerator main body 700 is ensured.

Furthermore, when a ventilation mechanism such as a fan is provided between the control board 458 and the compressor 220, the air can flow from the control board housing part 713c to the compressor support part 713a. This further prevents the leaked refrigerant from flowing into the control board housing portion 713c. Moreover, the temperature rise of the compressor 220 is suppressed by this wind. That is, the reliability of the compressor 220 is improved.

As described above, the present invention can provide a refrigerator having high heat insulation box rigidity without increasing the weight. Therefore, this invention can be utilized for the other store | warehouse | chamber which uses a heat insulation box, for example, a heat retention box.

20, 200, 300, 400, 500, 600, 700 Refrigerator

main body

21, 201, 301, 401, 501, 601, 701

Heat insulation box

21a, 201a, 301a Front

opening 21b Chamfer

22, 202, 302, 602 702

Inner box

22b, 202b

Lower recess

23, 203, 303, 403, 503, 603, 703 Outer box 23a Front flange

23b Outer flange

23c Inner flange 24 Insulating material (insulating wall)
25, 26, 27, 28 Partition wall 29 Refrigerated room (storage room)
29a Refrigeration room door 30 Ice making room (storage room)
30a Ice making room door 31 First freezer room (storage room)
31a First freezer compartment door 32 Second freezer compartment (storage room)
32a Second freezer compartment door 33 Vegetable room (storage room)
33a Vegetable room door 34 Upper hinge 35 Lower hinge 36 Rail member 37 Space 38

Gasket

50, 220 Compressor (refrigeration cycle)
51 Evaporator (refrigeration cycle)
52 Side refrigerant piping (heating element, condenser)
53 Front refrigerant piping (heating element, condenser)
60, 260, 360

Main member

60a, 260a, 360a

Bottom surface portion

60b, 260b

Side surface portion

61, 261, 361, 461, 561, 661 Back surface

member 61a Hole

62, 662, 762 Top surface member 70 Vacuum heat insulating material 80 Front support leg ( Support legs)
81 Front tip 90 Back support leg (support leg)
91 Back

side tip portion

100, 230, 330 Defrost

water treatment unit

101, 231, 331

Storage unit

102, 232 Defrost

water treatment unit

104, 604, 704

Machine room

201b, 401b, 501b Top surface storage unit 202a

Upper recess

213 , 313, 413, 513 Upper surface

rear side member

262, 362 Upper surface front side member 301b Top

surface storage part

313a, 413a, 513a, 613a, 713a

Compressor support part

358, 458 Control board

413b Flange part

413c, 513c, 613c, 713c Control

Substrate accommodating portion

423, 523

Compressor cover

423a, 523a, 662f,

762f Exhaust port

604, 704 Machine room 611 Fan 612 Front member 623 Machine room cover 623a Vent

662c Partition plate

662d,

762d Front recess

662 , 762e intake port

Claims

A refrigerator including a refrigerator body having a heat insulation box with a storage chamber formed therein,
The heat insulating box has an outer box, an inner box, and a heat insulating wall formed by a heat insulating material filled between the outer box and the inner box,
Among the refrigeration cycle-related devices including the devices constituting the refrigeration cycle, a storage unit that stores external devices exposed to the outside air is disposed at the lower back of the storage chamber at the bottom of the heat insulation box,
The refrigerator provided with the heat insulation wall by which the bottom face part of the said lowermost store room and the bottom face part of the said storage part were formed integrally.
The external device is a defrost water treatment unit for evaporating water generated by melting frost generated by operation of the refrigeration cycle,
The refrigerator according to claim 1, wherein a heat insulating wall continuous with a bottom surface of the heat insulating box is formed at a lower portion of the defrost water treatment unit.
The external device is a compressor;
The refrigerator according to claim 1, wherein a heat insulating wall continuous with a bottom surface of the heat insulating box is formed at a lower portion of the defrost water treatment unit.
The outer box is provided with a main member having a side part that constitutes both left and right side surfaces of the heat insulation box, and a bottom part that constitutes at least a part of the lower surface of the heat insulation box,
The refrigerator according to claim 1, wherein the main member is formed integrally with the side surface portion and the bottom surface portion.
The refrigerator according to claim 1, wherein left and right side portions of the storage portion have heat insulating walls continuous with left and right side portions of the heat insulating box.
2. The refrigerator according to claim 1, wherein the heat insulating wall on the bottom surface of the heat insulating box and the heat insulating wall at the lower part of the storage portion are horizontal and have the same thickness.
The heat insulation box has a chamfered portion at the left and right corners on the back side,
The refrigerator according to claim 1, further comprising a support leg of the refrigerator main body in a chamfered region surrounded by a surface of the chamfered portion, an extended surface of the side surface of the refrigerator main body, and an extended surface of the rear surface of the refrigerator main body. .
The refrigerator according to claim 1, further comprising a heating element formed by integration at a location other than the top surface of the heat insulating box that faces the bottom surface.
The refrigerator according to claim 8, wherein a cooling temperature of the storage room including the upper surface is a refrigeration temperature zone.
The refrigerator according to claim 8, wherein the heating element is disposed on the heat insulating material side of the outer box.
The refrigerator according to claim 8, wherein the heating element is disposed closer to the front opening than a position of 100 mm from the front opening of the heat insulating box to the back side.
The refrigerator according to claim 8, wherein the heating element is a part of a condenser forming a refrigeration cycle.
In addition to the storage part provided at the lower back side of the storage chamber at the bottom of the heat insulation box, further comprising a top surface storage part provided at the upper part of the storage chamber at the top of the heat insulation box,
A back member that forms the back surface of the heat insulation box, an upper surface member that forms an upper surface of the heat insulation box, and a top surface back side member that forms a back side and a bottom surface of the top surface storage unit,
The refrigerator according to claim 1, wherein the upper surface member, the top surface rear side member, and the back surface member are integrally formed.
The refrigerator according to claim 13, wherein the heat insulating material is filled between a lower surface of the compressor support portion of the upper surface member and the inner box.
A control board for controlling the refrigeration cycle;
The compressor is stored in the top surface storage part of the heat insulation box,
The refrigerator according to claim 13, wherein a compressor support portion that supports the compressor and a control board housing portion that houses the control board are integrally formed.
The refrigerator according to claim 1, wherein a compressor forming the refrigeration cycle is disposed at an upper part on the back side of the refrigerator body.