JP7209554B2 - refrigerator - Google Patents

Description

Embodiments of the present invention relate to refrigerators.

2. Description of the Related Art A refrigerator has a compressor and a condenser, which form part of a refrigerating cycle, and a heat radiation fan for cooling them in a machine room formed on the back of a refrigerator body. In such a refrigerator, the heat dissipation fan is rotated in correspondence with the driving of the compressor, thereby improving the efficiency of heat dissipation inside the machine chamber and saving the power of the refrigerator (for example, Patent Document 1 below).

However, due to the recent heightened awareness of the environment, there is a strong demand for power saving, and there is a demand for a further improvement in the heat radiation efficiency inside the machine chamber.

JP 2011-231948 A

SUMMARY OF THE INVENTION It is an object of the present invention to provide a refrigerator capable of saving electric power by enhancing the heat dissipation efficiency of a condenser disposed in a machine room.

A refrigerator according to one embodiment includes a refrigerator main body having a storage chamber therein, a compressor, a condenser that receives refrigerant discharged from the compressor, a switching valve provided on an outlet side of the condenser, and the A refrigeration cycle having a first cooler provided on one outlet side of a switching valve and a second cooler provided on the other outlet side of the switching valve and provided in parallel with the first cooler; a machine room provided in the rear part of the refrigerator main body and containing the compressor, the condenser and the switching valve; a heat radiating fan that blows the air taken in from the air supply port to the compressor; a reinforcing angle provided on the back side of the machine room; a mounting bracket that fixes the switching valve to the reinforcing angle; wherein the switching valve is disposed outside the periphery of the air supply port, wherein the mounting bracket includes a fixing portion fixed to the reinforcing angle, and the air supply port provided with the a holding portion having a facing surface facing a side surface of the machine chamber; and a connecting portion connecting the fixing portion and the holding portion . The upper end of the is positioned below the upper end of the fixed portion .

BRIEF DESCRIPTION OF THE DRAWINGS A vertical cross-sectional view showing a schematic configuration of a refrigerator according to a first embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS The schematic diagram which shows the refrigerating-cycle apparatus in the refrigerator of 1st Embodiment of this invention. Rear view of the machine room with the rear grill removed AA sectional view of FIG. Perspective view of mounting bracket Enlarged view of main part of Fig. 4 Machine room side view

Hereinafter, refrigerator 10 of one embodiment of the present invention is explained based on a drawing.

(1) Structure of Refrigerator 10 Refrigerator main body 12 of refrigerator 10 is composed of an outer box 12a, an inner box 12b, and a heat insulating space 12c formed between them and provided with a heat insulating material. The refrigerator body 12 is provided with a refrigerating compartment 14, a vegetable compartment 16, a first freezing compartment 18, and a second freezing compartment 20 from the top. . A heat-insulating partition wall 24 is provided horizontally between the refrigerating space composed of the refrigerating compartment 14 and the vegetable compartment 16 and the freezing space composed of the ice making compartment, the first freezing compartment 18 and the second freezing compartment 20. there is

A refrigerating cooler 26 for cooling the refrigerating space consisting of the refrigerating compartment 14 and the vegetable compartment 16 is provided behind the refrigerating compartment 14 and the vegetable compartment 16 . A refrigerating fan 28 is provided above the refrigerating cooler 26 to blow cool air generated by the refrigerating cooler 26 to the refrigerating space.

A freezer cooler 30 for cooling the freezer space consisting of the ice making chamber, the first freezer compartment 18 and the second freezer compartment 20 is provided on the upper rear surface of the second freezer compartment 20. A freezing fan 32 is provided for blowing cold air generated by the cooler 30 to the freezing space.

A machine room 22 is arranged behind the bottom of the refrigerator body 12 , that is, behind the freezer compartment 20 . The machine room 22 is provided with a compressor 36, a condenser 58, a radiation fan 56, which form a part of the refrigerating cycle 84, and an evaporating dish 60 for receiving defrosted water generated from the freezer cooler 30 via the pipe 34. are doing. This machine room 22 will be described later in detail.

(2) Configuration of Refrigerating Cycle 84 Next, the configuration of the refrigerating cycle 84 of the refrigerator 10 of this embodiment will be described with reference to FIG.

The refrigerating cycle 84 includes an evaporating pipe 70, a condenser 58, a heat radiation pipe 88, a condensation prevention pipe 90, a dryer 92, and a switching valve 94 in order from a refrigerant outlet 36b of the compressor 36 that discharges high-temperature, high-pressure gaseous refrigerant. is connected to the inlet side of the

To one outlet of the switching valve 94, a refrigerating capillary tube 96, a refrigerating cooler 26, and a refrigerating suction pipe 72 are connected in this order by piping. To the other outlet of the switching valve 94, a freezing capillary tube 98 as pressure reducing means, a freezing cooler 30, a freezing suction pipe 74 and a check valve 75 are connected in order by piping. The outlet side of the check valve 75 and the outlet side of the refrigerating suction pipe 80 are connected to one connecting pipe 78 via a joint 76, and the outlet side of the connecting pipe 78 is connected to the refrigerant inlet 36a of the compressor 36. It is

In such a refrigerating cycle 84, after the refrigerant enclosed in the cycle is compressed by the compressor 36 and changed into a high-temperature and high-pressure gaseous refrigerant, the evaporating pipe 70, the condenser 58, the heat radiation pipe 88, the anti-condensation Heat is dissipated while flowing through the pipe 90 . The refrigerant flowing through the anti-condensation pipe 90 passes through a dryer 92 provided in the machine room 22, is guided to a switching valve 94, and is directed to a refrigerating capillary tube by the switching valve 94 based on a command from a control device (not shown) of the refrigerator. 96 and the freezing capillary tube 98, and the pressure is reduced so as to facilitate vaporization.

The refrigerant depressurized and liquefied by passing through the refrigerating capillary tube 96 and the freezing capillary tube 98 evaporates in the refrigerating cooler 26 and the freezing cooler 30, and absorbs heat from the surroundings, thereby cooling the refrigerating cooler 26 and freezing cooling. The container 30 is cooled and cold air is generated to cool the refrigeration and storage spaces.
The gas refrigerant that has passed through the refrigerator cooler 26 is sucked into the compressor 36 again through the refrigerator suction pipe 72, the joint 76, and the connecting pipe 78. After passing through the stop valve 75 and merging with the refrigerant that has passed through the refrigerator cooler 26 at the joint 76, it passes through the connecting pipe 78 and is sucked into the compressor 36 again, repeating a series of cycles.

(3) Structure of Machine Room 22 As shown in FIGS. 1, 3 and 4, the machine room 22 is a space formed below the step portion 13 of the refrigerator body 12. The side surface and rear surface are closed by the bottom plate 44, the left and right lower rear portions 12aL and 12aR of the outer casing 12a, and the rear grille 52. As shown in FIG. The bottom plate 44, the lower end of the outer casing 12a, and the back grill 52 are connected to L-shaped reinforcing angles 42 fixed to the lower left and right sides of the refrigerator body 12, respectively.

Inside the machine room 22, a heat dissipation fan 56 is provided near one side in the width direction (for example, the right side when viewed from the back). The heat radiation fan 56 is arranged so as to divide the machine room 22 into right and left sides. A compressor 36 is provided in the second space S<b>2 facing the outlet 56 b of the fan 56 .

In the first space S1, external air taken in from an air supply port 46 provided in the lower rear portion 12aR of the outer casing 12a and an air supply port 47 provided in the rear grille 52 is supplied as indicated by arrows in FIG. A flow path (duct) for flowing toward the suction port 56 a of the heat dissipation fan 56 is formed in the . The air supply port 46 provided in the outer casing 12 a is provided at a position facing the condenser 58 and the rotating shaft of the heat radiation fan 56 .

The condenser 58 provided in the first space S1 is provided closer to the suction port 56a of the heat radiation fan 56 than the center in the width direction of the first space S1. The condenser 58 is a fin tube in which a plurality of plate-shaped radiation fins are attached in parallel to an aluminum refrigerant tube that is bent multiple times, and has a rectangular parallelepiped overall shape. The condenser 58 is arranged so that the radiation fins constituting the condenser 58 are parallel to the normal direction of the air supply port 46 provided in the outer casing 12a. In other words, the condenser 58 is arranged such that the arrangement direction of the radiation fins is parallel to the air supply port 46 .

The dryer 92 and the switching valve 94 are fixed to the reinforcing angle 42 via the mounting bracket 100, are arranged outside the periphery of the air supply ports 46, 47 so as to face the air supply ports 46, 47, and are arranged outside the first space S1. It is provided close to the box 12a side.

Specifically, as shown in FIGS. 5 and 6, the mounting bracket 100 is formed by bending a metal piece having a predetermined shape, and includes a holding portion 102, a fixing portion 104, and a connecting portion .

The holding portion 102 has a facing surface 102a facing substantially parallel to the lower rear portion 12aR of the outer casing 12a provided with the air supply port 46 . A switching valve 94 is fixed to the facing surface 102a with a sheet-like elastic body 110 such as a rubber sheet interposed therebetween. The holding portion 102 has a rectangular shape longer in the front-rear direction than in the up-down direction corresponding to the shape of the side surface of the switching valve 94. A switching valve 94 is held below the rotating shaft of 56 . Thereby, the switching valve 94 is arranged outside the peripheral edge of the air supply port 46 so as to face the air supply port 46 in a side view of the refrigerator body 12 as shown in FIG. 7 .

The fixed portion 104 is provided along the back surface of the L-shaped reinforcing angle 42 and is fixed by tightening the reinforcing angle 42 together with the rear grille 52 by fastening means 53 such as screws.

The connecting portion 106 has an L-shaped planar shape that connects the fixing portion 104 and the holding portion 102. The dryer holding portion 106b extends forward from the inner end in the width direction of the fixing portion 104, and the front end of the dryer holding portion 106b. and a guide portion 106a that is bent inward in the width direction, that is, in a direction away from the lower rear portion 12aR of the outer casing 12a that constitutes the side surface of the machine chamber 22. As shown in FIG. A holding portion 102 is formed by further bending forward at the tip (inner end in the width direction) of the guide portion 106a.

The guide portion 106a is provided with a lead wire 120 along the surface facing the switching valve 94 (that is, the front surface of the guide portion 106a) along which a driving power source and a control signal for the switching valve 94 are supplied from the control device. A connector (not shown) provided at the tip of the lead wire 120 provided along the guide portion 106a is connected to a connection portion 94d of the switching valve 94 directed toward the guide portion 106a (see FIG. 6). ).

The dryer holding portion 106b holds, between the clips 108, the dryer 92 provided along the surface facing inward in the width direction. The dryer 92 held by the dryer holding portion 106 b is positioned laterally (outside in the width direction) of the air supply port 47 provided in the inclined portion of the rear grill 52 .
Thereby, the dryer 92 is arranged outside the periphery of the air supply port 47 so as to face the air supply port 47 .

In this embodiment, the length of the switching valve 94 in the vertical direction is shorter than the length of the fixing portion 104 and the connecting portion 106 in the vertical direction, and the switching valve 94 is located below the central portion of the fixing portion 104 and the connecting portion 106 in the vertical direction. 94 is provided.

In the first space S1, a refrigerator suction pipe 72 connected to the outlet side of the refrigerator cooler 26 and a freezer suction pipe 74 connected to the outlet side of the freezer cooler 30 are connected to the stepped portion 13 of the refrigerator main body 12. protruding from Refrigerated suction pipe 72 is connected to joint 76 and is connected to joint 76 via check valve 75 to merge with frozen suction pipe 74 . The outlet of the joint 76 is connected to a connecting pipe 78 and connected to the refrigerant inlet 36 a of the compressor 36 .

An evaporating dish 60 is provided on the bottom plate 44 of the machine room 22 so as to straddle the first space S1 and the second space S2. A lower opening of the pipe 34 is provided above the evaporating plate 60 , and the evaporating plate 60 receives the defrosted water of the freezer cooler 30 flowing out of the pipe 34 .

A refrigerant outlet 36b of the compressor 36 provided in the second space S2 is connected to an evaporation pipe 70 provided on the heat radiation fan 56 side. The evaporating pipe 70 is bent into a planar shape along the bottom surface of the evaporating dish 60 , and this planar portion is arranged inside the evaporating dish 60 . Such an evaporation pipe 70 is immersed in the defrosted water accumulated in the evaporating dish 60 and exchanges heat therewith, thereby cooling the refrigerant flowing through the evaporating pipe 70 and removing the defrosted water accumulated in the evaporating dish 60. Heat to facilitate evaporation. The outlet side of the evaporating pipe 70 is connected to the refrigerant inlet 58 a of the condenser 58 provided above the evaporating dish 60 . The refrigerant pipe connected to the refrigerant outlet 58b of the condenser 58 enters from the stepped portion 13 of the refrigerator body 12 into the heat insulating space 12c between the outer box 12a and the inner box 12b of the refrigerator body, and is provided in the heat insulating space 12c. It is connected to the radiating pipe 88 and the anti-condensation pipe 90 which are provided.

The outlet side of the anti-condensation pipe 90 protrudes from the stepped portion 13 of the refrigerator body 12 into the first space S1 of the machine room 22 and is connected to the refrigerant inlet 92a of the dryer 92 fixed to the reinforcing angle 42 via the mounting bracket 100. A refrigerant inlet 94a of a switching valve 94 is connected to a refrigerant outlet 92b of the dryer 92 . A refrigerant outlet 94b on one side of the switching valve 94 is connected to a refrigerating capillary tube 96 to a refrigerant outlet 94c on the other side, and a freezing capillary tube 98 on the other side of the switching valve 94 is connected.

The compressor 36 provided in the second space S2 has a substantially elliptical planar shape and is fixed to the bottom plate 44 of the machine chamber 22 via a rubber cushion (not shown). The second space S2 is provided in the lower rear portion 12aL of the outer casing 12a while the air in the first space S1 blown out from the outlet 56b of the heat dissipation fan 56 cools the compressor 36 as indicated by the arrow in FIG. It forms a flow path that flows toward an exhaust port 48 provided on the rear grille 52 and an exhaust port 49 provided on the back grill 52 .

(4) Effect In the refrigerator 10 of the present embodiment, when the compressor 36 arranged in the machine room 22 is activated to start the cooling operation of the refrigerating space and the freezing space, the evaporation pipe 70, the condenser 58, the heat radiation pipe 88 and A high-temperature refrigerant flows through the anti-condensation pipe 90 . As a result, the temperature in the machine room 22 rises due to heat generated by the operation of the compressor 36 and heat dissipation from the evaporation pipe 70 and the condenser 58 arranged in the machine room 22. It is started and the inside of the machine room 22 is cooled.

In other words, outside air is taken into the first space S1 through the air supply ports 46 and 47 by the blowing action of the heat dissipation fan 56, cools the condenser 58, and then is sucked into the suction port 56a of the heat dissipation fan 56, and the air blows out. It is discharged from 56b into the second space S2. The air discharged into the second space S2 flows through the second space S2 while cooling the compressor 36, and passes through the exhaust port 48 provided in the outer casing 12a and the exhaust port 49 provided in the back grill 52. exhausted to the outside.

In this embodiment, the switching valve 94 is arranged outside the periphery of the air supply port 46 provided on the side surface of the machine room 22 . Therefore, the switching valve 94 does not block the air introduced from the air supply port 46, and outside air is easily taken into the first space S1, and the cooling efficiency in the machine room 22 can be improved.

In addition, in the present embodiment, the switching valve 94 is arranged outside the periphery of the air supply port 46 , and the external air introduced from the air supply port 46 passes through the vicinity of the switching valve 94 . Surrounding air does not stagnate. Therefore, the refrigerant flowing through the switching valve 94 can be cooled, and further power saving of the refrigerator can be achieved.

Moreover, in the present embodiment, the switching valve 94 is arranged in the first space S1 forming a flow path connecting the suction port 56a of the heat radiation fan 56 and the air supply port 46 provided in the outer casing 12a. , the refrigerant flowing through the switching valve 94 can be efficiently cooled, and power saving of the refrigerator can be achieved.

In this embodiment, since the switching valve 94 is fixed to the reinforcing angle 42 via the mounting bracket 100, the refrigerant pipe connected to the switching valve 94 is not damaged unexpectedly.

Further, in this embodiment, since the switching valve 94 is fixed to the facing surface 102a facing the outer casing 12a constituting the side surface of the machine room 22, the condenser accommodated in the first space S1 together with the switching valve 94 It becomes less susceptible to the heat emitted from 58 and evaporation pipe 70 .

In particular, by providing the sheet-like elastic body 110 between the holding portion 102 of the mounting bracket 100 and the switching valve 94 as in the present embodiment, vibration of the switching valve 94 can be suppressed while Thermal effects can be suppressed.

Further, in this embodiment, the lead wire 120 connected to the switching valve 94 is provided along the connecting portion 106 that connects the fixing portion 104 fixed to the reinforcing angle 42 and the holding portion 102 to which the switching valve 94 is attached. Since the portion 106a is provided, the wiring workability of the lead wire 120 is improved, and the lead wire 120 is arranged in an unintended position, and the lead wire 120 may block the air supply port 46, or the lead wire 120 may be damaged when vibration occurs. There is no risk of collision with other members and generation of abnormal noise.

(Change example)
In the embodiment described above, the switching valve 94 may be fixed to the holding portion 102 so that the upper portion of the switching valve 94 protrudes upward from the holding portion 102 of the mounting bracket 100 .

In addition, in the above-described embodiment, the case where the machine room 22 is positioned at the lower back surface of the refrigerator main body 12 has been described, but the present invention is not limited to this, and may be provided at the upper rear surface of the refrigerator main body 12, for example. .

Although embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, as well as the scope of the invention described in the claims and equivalents thereof.

DESCRIPTION OF SYMBOLS 10... Refrigerator, 12... Refrigerator body, 12a... Outer case, 13... Multi-layered portion, 14... Refrigerating compartment, 16... Vegetable compartment, 22... Machine room, 26... Refrigerating cooler, 28... Refrigerating fan, 30... Refrigerating cooler , 32... Freezing fan, 36... Compressor, 42... Reinforcing angle, 44... Bottom plate, 46... Air supply port, 47... Air supply port, 48... Exhaust port, 49... Exhaust port, 52... Rear grille, 56... Heat dissipation Fan 56a Suction port of radiation fan 56b Blow-out port of radiation fan 58 Condenser 84 Refrigeration cycle 94 Switching valve 100 Mounting bracket 102 Holding part 104 Fixing part 106 Connection part 106a... Guide part 106b... Dryer holding part 108... Clip 110... Sheet-like elastic body 120... Lead wire S1... First space S2... Second space

Claims (2)

a refrigerator body having a storage chamber inside;
a compressor, a condenser that receives refrigerant discharged from the compressor, a switching valve provided on an outlet side of the condenser, a first cooler provided on one outlet side of the switching valve, a refrigeration cycle having a second cooler provided on the other outlet side of the switching valve and provided in parallel with the first cooler;
a machine room provided in the rear part of the refrigerator main body and housing the compressor, the condenser, and the switching valve;
an air supply port provided on a side surface of the machine room for introducing outside air into the machine room;
a heat radiation fan that blows the air taken in from the air supply port to the compressor;
a reinforcing angle provided on the rear side of the machine room;
a mounting bracket for fixing the switching valve to the reinforcing angle;
with
A refrigerator in which the switching valve is arranged outside the peripheral edge of the air supply port,
The mounting bracket connects a fixing portion fixed to the reinforcing angle, a holding portion having a facing surface facing a side surface of the machine room provided with the air supply port, and the fixing portion and the holding portion. a connector;
The switching valve is fixed to the facing surface of the holding portion,
A refrigerator in which the upper end of the holding portion is positioned below the upper end of the fixing portion. 2. The refrigerator according to claim 1 , wherein the switching valve is arranged in a flow path connecting the suction port of the heat radiating fan and the air supply port.

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