JP4552800B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator that increases the volume of the lowermost storage chamber and improves the storage volume and storage performance of the uppermost storage chamber.

  In recent years, refrigerators are required to be further energy-saving from the viewpoint of protecting the global environment and to be improved in usability and storage.

  This type of conventional refrigerator has a condenser in the space formed by the top plate and the upper wall of the heat insulating wall for the purpose of increasing the volume in the cabinet that can be used effectively without increasing the external dimensions. A method has been adopted in which the compressor is disposed in a space formed by the top plate, the rear upper outer surface of the heat insulating wall, and the back plate in communication with the space (for example, see Patent Document 1).

  6 and 7 show the configuration of a conventional refrigerator described in Patent Document 1. FIG.

  As shown in FIGS. 6 and 7, the refrigerator main body 1 has a refrigerator compartment 2, a freezer compartment 3, and a vegetable compartment 4 in order from the top to the bottom, and the front opening of the refrigerator compartment 2 has a right end side or a left end side. An open / close door 6 is provided which is rotatably supported with respect to the vertically long box shape of the front opening shape of the refrigerator body 1. In consideration of usability and storage, the freezer compartment 3 has its front opening closed by a door 3a, and a container 7 having an upper opening is attached to the back side of the door 3a, and a rail (not shown) in the front-rear direction. It is supported so as to be movable in the front-rear direction. In consideration of usability and storability, the vegetable compartment 4 is closed at its front opening by a door 4a, and a container 9 having an upper surface opening shape is attached to the back side of the door 4a. (Not shown) so as to be movable in the front-rear direction. For this reason, when the doors 3a and 4a are pulled out to the front of the refrigerator main body 1, the containers 7 and 9 are pulled out to the front of the refrigerator main body 1, and a drawer chamber is formed in which the containers 7 and 9 can store and take out food and the like. is doing.

  Reference numeral 11 denotes one cooler constituting the cooling unit, and the air cooled here is circulated by the blower 13 through the duct (not shown) to the refrigerator compartment 2, the freezer compartment 3, and the vegetable compartment 4, respectively.

  Reference numeral 15 denotes a recess in which a rear corner of the upper wall extending over the upper wall 16 and the back wall 17 of the refrigerator main body 1 is recessed so that the upper rear portion of the refrigerator compartment 2 which is the uppermost storage chamber is lowered. The left and right sides of the recess 15 are closed by the left and right walls of the refrigerator body 1 and open upward and to the back. The open portion of the recess 15 is formed by an upper plate 18a and a back plate 18b substantially perpendicular to the upper plate 18a. The cover 18 is covered. The cover 18 is detachably fixed to the refrigerator main body 1 with screws or the like.

The compressor 19 and the condenser 20 are each one of the components of the refrigeration unit, and the condenser 20 is radiated by a blower 21. The compressor 19 and the condenser 20 are the high-pressure equipment 22 of the refrigeration unit, and are disposed in the recess 15 together with the blower 21 and covered with the cover 18. The upper end of the high-voltage device 22 is below the upper surface of the refrigerator body 1, that is, the upper surface of the upper wall 16 so as not to protrude from the recess 15. The upper plate 18 a and the back plate 18 b of the cover 18 are provided with a plurality of ventilation holes 23 for heat dissipation of the high-voltage device 22. Thus, since the high voltage | pressure apparatus 22 exists in the upper part of the main body 5, the temperature rise of the refrigerator main body 1 by the heat dissipation can be reduced.
JP 2001-99552 A

  However, in the above conventional configuration, the compressor 19 and the condenser 20 are disposed in the recess 15 in the top surface portion of the refrigerator body 1, so that the required volume of the recess 15 is increased and the upper end of the high-pressure device 22 is recessed. Since it is constituted so as not to protrude from the place 15, the protruding volume to the refrigerator compartment 2, which is the uppermost storage room, is further increased.

  As described above, in the conventional configuration, even if the compressor 20 is removed from the region of the lowermost storage chamber and the storage volume and storage performance are increased, the arrangement of the compressor 19 and the condenser 20 is still devised. Therefore, the recess 15 provided on the top surface of the refrigerator main body 1 requires a large volume for installing the compressor 19 and the condenser 20, and can be stored around the upper stage of the refrigerator compartment 2, which is the uppermost storage room. Becomes worse. Furthermore, if the protrusion to the refrigerating room 2 is increased, the user is given a feeling of pressure when the door 6 is opened and the design is also deteriorated.

  In addition, when luggage is placed on the top of the refrigerator or when it is pressed against the wall when installed on the back, the exhaust port is blocked and the leaked flammable refrigerant does not diffuse and stays more dangerous. However, since the air flow in the machine room is hindered, the cooling of the compressor is impaired, and there is a problem that the power consumption is increased.

  The present invention solves the above-described conventional problems, and increases the internal volume of the lowermost storage chamber and makes good use of the ineffective space of the refrigerator without deteriorating the storage capacity and storage capacity of the uppermost storage chamber. To do.

  Moreover, it aims at providing the refrigerator which improved the safety | security at the time of using a combustible refrigerant | coolant, and reduced power consumption by the efficiency improvement of a compressor.

  In order to solve the above-described conventional problems, the refrigerator of the present invention has a refrigerator main body and a machine room provided on the upper part of the refrigerator main body, and the machine room is a first top surface portion of the refrigerator main body. And a step formed with the second top surface provided at a position lower than the first top surface as its bottom surface, a compressor is disposed on the second top surface of the refrigerator body, and the machine room The upper end of the compartment covering the top is located above the first top surface of the refrigerator body.

  As a result, it is possible to store the compressor in an invalid space where the user behind the top of the refrigerator cannot reach, so to speak, and arrange the installed compressor upward as much as possible, to the uppermost storage room The protrusion allowance can be reduced.

  The refrigerator of the present invention contains the compressor in an ineffective space that is not accessible to the user who is behind the top surface of the refrigerator main body, increases the storage capacity of the lowermost storage chamber, improves the storage capacity, and installs the compressor. The compressor can be arranged upwards together with the machine room cover, and the protrusion margin to the uppermost storage chamber can be reduced, so that the storage capacity and storage performance of the uppermost storage chamber are not deteriorated. In addition, the ineffective space of the refrigerator can be used well without feeling the appearance of pressure.

Invention of Claim 1 has a refrigerator main body, the machine room provided in the upper part of the said refrigerator main body, and the machine room cover which covers the division of the said machine room, The said machine room is the said refrigerator main body. The first top surface portion and the second top surface portion provided at a position lower than the first top surface portion are formed in a stepped shape with the bottom surface thereof, and a compressor is disposed on the second top surface portion of the refrigerator main body. Further, a flammable refrigerant is enclosed as a refrigerant in the refrigeration cycle including the compressor, and the upper end of the compartment covering the machine room is located above the first top surface portion of the refrigerator body, thereby An opening is provided in a step portion formed between one top surface portion and a section covering the machine room, and the step portion is inclined so as to become lower from the rear to the front of the refrigerator body, and the machine room The back part of the cover has inclined parts on both the left and right sides. Wherein is intended to provide an opening portion at a position below the electric part of the compressor of the inclined portion, the user that top rear of the refrigerator body is inaccessible, houses the compressor to speak invalid space, the bottom The storage capacity of the storage chamber can be increased to improve the storage capacity, and the installed compressor can be arranged upward together with the machine room cover, so that the projection margin to the uppermost storage chamber can be reduced. The ineffective space of the refrigerator can be used well without deteriorating the storage capacity and storage capacity of the uppermost storage room and without feeling the appearance of pressure. Moreover, since the volume of the machine room can be increased, it can also be used for storing control boards, which are other necessary functional components. In addition, since a step by the machine room can be provided toward the back side of the main body, it is possible to add a function as a stopper to stop the load at the step even if a luggage etc. is installed on the top surface of the main body and is slid to the back side. This reduces the possibility that the exhaust heat in the machine room will be hindered by external factors.
Moreover, it can utilize also as an opening part for carrying out the natural exhaust heat of the air thermally radiated by the compressor etc., the fall of the cooling efficiency of a compressor does not arise, and the increase in the power consumption of a refrigerator can be suppressed.
In addition, the refrigerant flowing into the lower part of the machine room due to the difference in specific gravity with the air can be quickly released and diffused into the atmosphere from the opening, thereby improving safety.
Moreover, even if it presses against the back wall which installed the refrigerator main body, it can maintain, without blocking up an opening part completely.
Moreover, since maintenance can be performed by removing only the machine room cover during maintenance such as compressor repair, workability is improved.

  The invention according to claim 2 is the invention according to claim 1, wherein the step portion formed in the upper storage chamber in which the compressor is installed is the highest among the plurality of storage shelves installed in the storage chamber. The height of the storage shelf installed in the upper tier is approximately the same as or higher than that of the upper storage shelf. It can be finished in a neat design with no apparent pressure. Also, by positioning the uppermost storage shelf below the step and extending it to the back of the interior, the depth dimension of the storage shelf below the uppermost storage shelf can be made the same. There is also a possibility of cost merit by sharing parts.

According to a third aspect of the present invention, in the first aspect of the present invention, the rear portion of the machine room cover is a separate part that can be attached and detached, and the machine room cover has a two-part configuration. Since maintenance can be performed by removing only the back portion of the machine room cover, which is a relatively small part during maintenance such as repair, workability is improved. In addition, by dividing the machine room cover into two small parts, when the machine room cover is supplied to the manufacturing line of the refrigerator main body, it is possible to increase the storage efficiency in a container or the like that conveys the machine room cover.

According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects of the present invention, a heat dissipating fan for cooling the compressor is provided in the machine room. The safety of the combustible refrigerant leaked when the combustible refrigerant leaks can be improved more quickly into the atmosphere from the opening. Further, by cooling the compressor, the coefficient of performance (COP) of the compressor is improved by improving the cooling efficiency of the compressor, and the power consumption of the refrigerator can be reduced. It is also possible to further reduce the capacity of the machine room by reducing the capacity improvement of the compressor housed on the top surface.

  Hereinafter, embodiments of a refrigerator according to the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments.

(Embodiment 1)
1 is a cross-sectional view of a refrigerator according to Embodiment 1 of the present invention, FIG. 2 is a cross-sectional view of essential parts of the refrigerator according to the same embodiment, FIG. 3 is a rear perspective view of essential parts of the refrigerator according to the same embodiment, and FIG. FIG. 5 is a front perspective view of a main part of the refrigerator in the same embodiment, and FIG. 5 is an exploded perspective view of a machine room cover of the refrigerator in the same embodiment. In addition, the same code | symbol is attached | subjected about the same structure as background art.

  As shown in FIGS. 1 to 5, the refrigerator body 1 is provided with a refrigerating chamber 30 which is a relatively high temperature compartment in the upper portion and a freezer compartment 31 which is a relatively low temperature compartment in the lower portion. The refrigerator compartment 30 and the freezer compartment 31 are partitioned and arranged by a partition wall 28 configured to be thermally insulated from the surroundings by a heat insulating material such as urethane. Moreover, taking in and out of stored items such as food is performed through the refrigerator door 30a and the freezer door 31a, which are the respective heat insulating doors.

  The refrigerator compartment 30 is usually set at 1 to 5 ° C. for refrigerated storage, but may be set at a slightly lower temperature, for example, −3 to 0 ° C. for improving the freshness, and may be used depending on the stored items. In some cases, a person can freely switch the temperature setting as described above. In addition, in order to preserve wine, root vegetables, etc., the temperature may be set slightly higher, for example, around 10 ° C.

  The freezer compartment 31 is usually set at −22 to −18 ° C. for frozen storage, but may be set at a lower temperature, for example, about −30 ° C., for improving freshness.

  On the top surface of the refrigerator main body 1, a concavely recessed machine room 32 having an open upper side and a back side is configured. The machine room 32 includes a first top surface portion 33 and a first on the refrigerator outer box back plate 17 side. The second top surface portion 34 provided at a position lower than the top surface portion 33 is stepped. The compressor 19 and the heat radiating fan 29 are disposed in an upper space portion of the second top surface portion 34, and cover the compressor 19 and the heat radiating fan 29 by closing the upper and back sides of the machine room 32 formed in a step shape. A machine room cover 35, which is a resin cover, is fixed to the refrigerator main body 1 with screws or the like (not shown). The machine room cover 35 may be made of metal.

  The compartment covering the machine room 32 is configured by being covered with a first top surface part 33, a second top surface part 34, and a machine room cover 35.

  The machine room cover 35 is generally composed of an upper cover 36 that covers the upper opening with two parts and a lower cover 37 that covers the back opening. The upper cover 36 includes an upper cover front surface portion 36 a and an upper cover side surface portion 36 b, and a lower cover 37 covers an opening between the upper cover 36 and the back plate 17. For example, the opening 38 is provided at a position located below the first top surface portion 33 of the lower cover 37. In some cases, an opening 39 is provided in the upper cover front surface portion 36 a, which is a step portion between the first top surface portion 33 and the upper cover 36. Further, an opening may be provided on the side surface of the upper cover. In that case, it is preferable to provide an inclination so as to be lowered toward the outside of the refrigerator body 1 in order to make it difficult to see from the side.

  The refrigerating room 30 is provided with a first ceiling surface 40 in front of the interior ceiling and a second ceiling surface 41 lowered by placing the compressor 19 on the back side of the interior, and between the two. A step 45 is formed. Further, a plurality of storage shelves 42 for storing food are provided, and the storage shelf 42 that is positioned at the uppermost stage in the inner cabinet is disposed at substantially the same height as the second ceiling surface 41. Basically, the height interval between the storage shelves 42 is adjusted to a height at which 350 mL of canned beer can enter, but is configured to be partially movable up and down.

  Normally, the uppermost storage shelf 42 has only a depth up to the stepped portion of the second ceiling surface 41, but may extend directly below the second ceiling surface 41 to the interior of the cabinet. In that case, it can also be used as the uppermost storage shelf.

  Further, a refrigerator compartment duct 43 is provided below the second ceiling surface 41 at the back of the refrigerator compartment 30, and discharge holes (not shown) for supplying cold air to the respective storage shelves 42 are arranged. In addition, the refrigerator compartment duct 43 may be configured up to a stepped portion 45 that can be formed on the first ceiling surface 40 and the second ceiling surface 41 in order to supply cold air to the uppermost space in the cabinet.

  In the freezer compartment 31, an evaporator 50 for cooling the inside of the refrigerator and a cooling fan 51 for circulating cool air in the upper space are arranged on the back side. The inside of the refrigerator is provided with a drawer-type freezer compartment door 31a so that when it is pulled out forward, a plurality of storage containers 52 whose upper sides are opened can be pulled out together to store food.

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

  By providing a recessed machine room 35 between the first top surface portion 33 and the second top surface portion 34 of the refrigerator main body 1 and storing the refrigeration cycle components such as the compressor 19, Since the compressor 19 does not exist behind the freezing chamber 31 that is the lowest storage chamber, the storage capacity of the freezing chamber 31 can be dramatically increased. Furthermore, since the freezer compartment 31 is configured as a drawer storage chamber, the depth of the drawer can be increased, and the storage amount of the storage container 52 is increased. In addition, by accommodating the compressor 19 or the like in a place that is a so-called invalid space that is not reachable by the user, it is possible to realize a layout configuration that improves overall storage performance and storage efficiency.

  However, even if the upper rear of the refrigerator compartment 31 which is the uppermost storage room is an invalid space, it is necessary to suppress the protruding dimension as much as possible.

  Here, the machine room 35 is arranged behind the top surface of the refrigerator main body 1 and the upper end of the machine room cover 35 is protruded from the first top surface part 33, whereby the second top surface part 34 constituting the machine room 35 and The compressor 19 to be mounted can be configured at a high position. By doing so, it becomes possible to reduce the dimension which protrudes to the refrigerator compartment 31, can increase the storage capacity of the refrigerator compartment 31, and can also reduce the appearance of the oppressive feeling with respect to a user. Moreover, since the protrusion from the 1st top surface part 33 of the machine room cover 35 is located in the back of the refrigerator main body 1, it also has the advantage that it is hard to notice even if a user sees from the front. In addition, it is hard to understand that the upper cover front surface portion 36a is protruded from the rear side of the refrigerator main body 1 toward the front side, and it is difficult to understand and the design is improved.

  On the other hand, in the refrigerator compartment 30, the uppermost storage shelves 42 are arranged and configured at substantially the same height as the stepped portion 45 formed by the machine room 32, so that the uppermost storage depth that is unreachable is small, and the storage immediately below it is stored. A depth from the shelf 42 to the refrigerator compartment duct 43 can be secured. Furthermore, since the apex of the stepped portion 45 is hidden by the storage shelf 42, it is possible to improve the storage performance without a sense of incongruity.

  In addition, by suppressing the height from the first ceiling surface 40 to the uppermost storage shelf 42 to about the height of a 350 ml can, the lower storage height can be secured without impairing the uppermost storage capacity. There is no deterioration in storage.

  The uppermost storage shelf 42 is arranged directly below the second ceiling surface 41 and extends to the refrigerator compartment duct 43, so that the second ceiling surface 41 when viewed from below the refrigerator compartment 30 is stored in the storage shelf. The cover 42 can provide a hidden and refreshing feeling, and the storage shelf 42 below it can also be used as a component, leading to cost merit.

  Further, by providing a heat dissipating fan 29 for circulating the air in the machine room 35 and promoting the heat dissipating of the compressor 19, the efficiency and capacity can be increased. However, there is a possibility that the internal volume of the refrigerator compartment 31 can be further increased by reducing the capacity of the compressor 19 by reducing the capacity of the compressor room 19 and reducing the volume of the machine room 35.

  Next, the refrigeration cycle operation will be described. The refrigeration cycle is operated by a signal from a control board (not shown) according to the set temperature in the cabinet, and the cooling operation is performed. The high-temperature and high-pressure refrigerant discharged by the operation of the compressor 19 releases heat in the condenser 60 to be condensed and liquefied, and is reduced in pressure while exchanging heat with a capillary tube (not shown) to become a low-temperature and low-pressure liquid refrigerant. It reaches the evaporator 50.

  By the operation of the cooling fan 51, heat is exchanged with the air in each storage chamber, the refrigerant in the evaporator 50 is evaporated, and low-temperature cold air is supplied and controlled by a damper device or the like. Cooling is performed so that the temperature can be maintained. The refrigerant exiting the evaporator 50 is sucked into the compressor 19 through the suction pipe.

  Due to the action of the cooling fan 51, the cool air having a relatively low temperature due to the evaporating action of the refrigerant in the evaporator 50 flows into the refrigerating room 30 and the freezing room 31 through the refrigerating room duct 43. Done. In the evaporator 50, the refrigerant that exchanges heat with the air in the cabinet is then sucked into the compressor 19 through a suction line (not shown).

  As the refrigerant of the refrigeration cycle described above, isobutane, which is a flammable refrigerant with a low global warming potential, is used from the viewpoint of global environmental conservation. This isobutane, which is a hydrocarbon, has a specific gravity approximately twice that of air at room temperature and atmospheric pressure.

  If the flammable refrigerant leaks from the compressor 19 or the surrounding piping (not shown) that is at a high pressure during the operation of the compressor 19, it is directly above the second top surface 34, that is, below the lower cover 37. Since the plurality of openings 38 are provided, the refrigerant flowing into the lower part of the machine chamber 32 due to the difference in specific gravity with air can be quickly released and diffused into the atmosphere without stagnating, and safety can be improved. .

  In addition, by placing the compressor 19 as a high-pressure device in the upper part of the refrigerator, even if the flammable refrigerant leaks from the compressor 19 or the surrounding piping, the refrigerant flows toward the floor surface of the kitchen or the like due to the difference in specific gravity with air. Since it diffuses in the process of moving, safety can be improved compared to a refrigerator in which the compressor 19 is disposed on the bottom of the refrigerator.

  Further, if the opening 38 is provided below the electrical unit 61 that houses a connector unit (not shown) that supplies driving power to the compressor 19 that can be an ignition source of the flammable refrigerant, the inside of the machine chamber 35 is caused by a difference in specific gravity with air. Without stagnation of the refrigerant flowing in the vicinity of the electrical equipment 61, the refrigerant can be quickly released and diffused into the atmosphere, and safety can be further improved.

  When refrigeration cycle components such as a three-way valve and a switching valve are disposed in the machine room 35, openings are provided at locations below the connector portion that connects each component and the wiring connected to the control board. If 38 is provided, safety can be further improved.

  Further, if appropriate openings are provided in the upper cover front surface portion 36a and the upper cover side surface portion 36b, the air path resistance in the machine chamber 35 is reduced and the amount of cooling air from the heat radiation fan 29 to the compressor 19 is increased. As the coefficient of performance (COP) of the compressor 19 is improved by the improvement of the cooling efficiency of 19, the power consumption of the refrigerator can be reduced.

  Further, a heat radiating fan 29 for cooling the compressor 19 is provided in the machine room 35, and the compressor 19 is forcibly air-cooled, so that the flammable refrigerant leaked when the flammable refrigerant leaks by sucking outside air from the opening 39 is instantly provided. It can be released and diffused into the atmosphere from the opening 38, and the safety can be greatly improved. Further, by tilting the upper cover front portion 36a so as to become lower toward the front of the refrigerator body 1, even if a load is placed on the first top surface portion 33 and pressed to the back, the opening 39 is not blocked. it can.

  Further, by forming another part having a filter-like suction port that can be attached to and detached from the upper cover front part 36a, dust or the like can be attached to the upper cover front part 36a and removed from the side surface of the refrigerator body 1 for cleaning. As a result, it is possible to prevent an increase in air path resistance in the machine room 35 due to adhesion of dust or the like, so that when the flammable refrigerant leaks, it is possible to secure a sufficient air volume for the release and diffusion. Furthermore, even when the refrigerator is used in an environment where there is a lot of dust and the like, it is possible to minimize a decrease in the heat dissipation capability of the compressor 19, and thus an increase in power consumption can be suppressed. Moreover, if the inclined part 65 is formed in the both right and left sides of the lower cover 37 and the some opening part 38 is provided, even if it presses against the back wall which installed the refrigerator main body 1, it can maintain without blocking the opening part 38 completely. Further, the opening 38 is positioned on the discharge side of the heat radiating fan 29 and on the opposite side of the heat radiating fan 29 with respect to the compressor 19, so that the flammable refrigerant that has leaked from the compressor 19 can be quickly discharged by the heat radiating fan 29. It can be discharged and diffused outside the machine room 32.

  In addition, the lower cover 37 is a separate part that can be attached and detached, and the machine room cover 35 has a two-part configuration, so that the maintenance of the compressor 19 and its surrounding piping (not shown) can be relatively small. Since maintenance can be performed by removing only the lower cover 37, workability is improved. Moreover, by dividing into two parts, when supplying the machine room cover 35 to the production line of the refrigerator main body 1, the storage efficiency in the container etc. which convey the machine room cover 35 can be raised.

  In the present embodiment, the entire surface of the machine room cover 35 is shown to be higher than the first top surface portion 33. However, the same effect can be obtained by inflating the upper cover 36 only at the installation portion of the compressor 19. can get.

  In addition, although the lowermost storage chamber is shown as the freezer compartment 31 in which the inside of the cabinet is a two-stage storage container 52, the freezer compartment door 31a is divided and the respective storage containers 52 are arranged, A part may be set as a storage room in another temperature zone such as a vegetable room.

  As described above, the refrigerator according to the present invention can increase the storage capacity in the refrigerator by minimizing the stepped portion in the refrigerator compartment by placing the compressor on the upper rear side, and compresses the user. It is possible to improve the safety when using a flammable refrigerant because it can be released and diffused quickly into the atmosphere without stagnation when the flammable refrigerant leaks into the machine room. It is useful as a machine room configuration of a storage room equipped with not only a home refrigerator but also a commercial refrigerator and other cooling devices.

Sectional drawing of the refrigerator in Embodiment 1 of this invention Sectional drawing of the principal part of the refrigerator in Embodiment 1 of this invention The principal part back perspective view of the refrigerator in Embodiment 1 of this invention The principal part front perspective view of the refrigerator in Embodiment 1 of this invention. The exploded perspective view of the machine room cover of the refrigerator in Embodiment 1 of this invention Cross-sectional view of a conventional refrigerator Main part perspective view of a conventional refrigerator

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Refrigerator main body 19 Compressor 29 Radiation fan 30 Refrigeration room 32 Machine room 33 1st top surface part 34 2nd top surface part 35 Machine room cover 36 Upper cover 37 Lower cover 38 Opening part 39 Opening part 42 Storage shelf 45 Step part 61 Electrical component

Claims (4)

A refrigerator body, a machine room provided in an upper part of the refrigerator body, and a machine room cover that covers a section of the machine room, wherein the machine room includes a first top surface portion of the refrigerator body and the first A refrigeration unit that is formed in a stepped shape with the second top surface portion provided at a position lower than the top surface portion of the refrigerator as a bottom surface, a compressor is disposed on the second top surface portion of the refrigerator body, and further includes the compressor A flammable refrigerant is enclosed in the cycle as a refrigerant, and the upper end of the compartment covering the machine room is located above the first top surface part of the refrigerator body, so that the first top surface part and the machine room are An opening is provided in a step formed between the cover section and the step is inclined so as to be lowered from the rear to the front of the refrigerator main body, and the back portion of the machine room cover is inclined on both the left and right sides. The compressor of the inclined part by forming a part Refrigerator, characterized in that an opening portion at a position below the electric part.   The step portion formed in the upper storage chamber in which the compressor is installed is substantially the same as or higher than the height position of the upper storage shelf among the plurality of storage shelves installed in the storage chamber. The refrigerator according to claim 1, wherein the refrigerator is in a position.   The refrigerator according to claim 1, wherein a rear part of the machine room cover is a separate part that can be attached and detached, and the machine room cover has a two-part configuration.   The refrigerator as described in any one of Claim 1 to 3 provided with the thermal radiation fan which cools the said compressor in the said machine room.

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