WO2017195747A1

WO2017195747A1 - Refrigerator

Info

Publication number: WO2017195747A1
Application number: PCT/JP2017/017442
Authority: WO
Inventors: 亜有子宮坂; 愼一堀井; 境　寿和
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2016-05-13
Filing date: 2017-05-09
Publication date: 2017-11-16
Also published as: CN109073313B; CN109073313A

Abstract

Provided is a refrigerator in which the top surface of a mechanical chamber cover (42) covering an upper mechanical chamber (36) that is provided at the upper rear portion of a heat-insulating box (31) is higher than the top surface of the heat-insulating box (31), and top openings provided on the left and right portions of the top surface of the upper mechanical chamber (36) are disposed at a position lower than the top surface of the mechanical chamber cover (42).

Description

refrigerator

This disclosure relates to the structure of a refrigerator having a machine room at the top of the main body.

Conventionally, this type of refrigerator is provided with a vent on the side of the machine room, and heat is radiated from the cooling unit in the machine room (see, for example, Patent Document 1).

FIG. 8 is a perspective view as seen from the upper rear side of the machine room of the conventional refrigerator. As shown in FIG. 8, a conventional refrigerator 100 includes a machine room 11 formed by recessing the rear end of the upper surface of the refrigerator body 10, machine room side wall parts 11 a located on both side surfaces of the machine room 11, and a machine And a cover 12 covering the chamber 11. A compressor 13 and a fan motor 14 are installed in the machine room 11. Machine room side wall part 11a has the 1st side wall 15 and the 2nd side wall 16 which counters the 1st side wall 15, and the 1st side wall 15 and the 2nd side wall 16 have a plurality of holes. . With such a configuration, even when the refrigerator main body 10 is installed in close contact with the wall on the back side, the outside air can be taken in by the holes provided in the refrigerator side surfaces (the first side wall 15 and the second side wall 16). Exhaust is possible, and efficient heat dissipation of the cooling unit in the machine room 11 is possible.

However, in the above-described conventional configuration, when the refrigerator 100 is installed close to or against the side wall, heat radiation from the side surface is hindered, and it is difficult to obtain a reliable heat radiation effect. In particular, when the refrigerator 100 is installed in a limited space such as a system kitchen, the refrigerator 100 may be installed close to all the walls on the left and right side surfaces and the back surface, making it difficult to obtain a reliable heat dissipation effect.

JP 2007-17044 A

The present disclosure has been made in view of the above-described conventional problems. Even when the refrigerator side surface and the back surface are installed on a wall, the air temperature sucked into the machine room can be reduced with a simple configuration. A refrigerator that suppresses the rise and efficiently radiates heat is provided.

Specifically, a refrigerator according to an example of an embodiment of the present disclosure includes a heat insulating box, a machine room installed at a step provided at the upper back of the heat insulating box, a compressor installed in the machine room, and A blower, a machine room cover that covers the upper surface of the machine room, and openings provided on the left and right sides of the machine room. The upper surface of the machine room cover is higher than the upper surface of the heat insulation box, and the opening is disposed at a position lower than the upper surface of the machine room cover.

With such a configuration, since the upper surface of the machine room cover is close to the ceiling of the refrigerator installation space and the space between the upper surface of the heat insulation box and the ceiling is wide, the air path resistance above the machine room cover increases and increases. The exhaust of the warm machine room can be guided from the upper side of the heat insulation box to the front of the refrigerator. Further, the air in front of the refrigerator can be introduced into the machine room in preference to the air above the machine room cover. Thereby, using the space above the heat insulating box, outside air having a low temperature in front of the refrigerator can be taken into the machine room, and the compressor can be efficiently dissipated. Moreover, the back surface and side surface of the refrigerator can be placed against a wall of a house or the like, and the installation space for the refrigerator can be reduced in a limited space of the house or the like.

Furthermore, with this configuration, even when an object is placed on the refrigerator, the object is supported by the machine room cover so that the opening is not easily blocked. Therefore, the air volume which flows through a machine room is ensured, and the reliability of a refrigerator can be maintained. Further, with such a configuration, even if the height of the refrigerator is substantially equal to the height of the ceiling, the compressor can efficiently dissipate heat using the space above the heat insulating box. Therefore, the reliability of the refrigerator can be maintained.

Moreover, the refrigerator according to an example of the embodiment of the present disclosure may be provided with a convex portion in front of the machine room. With such a configuration, it is possible to suppress the exhaust gas guided to the front of the refrigerator from being directly introduced into the machine room through the front of the machine room. Thereby, since the low temperature air farther from the machine room can be introduced into the machine room, the heat dissipation efficiency of the compressor can be increased.

Further, in the refrigerator according to the example of the embodiment of the present disclosure, the control board storage unit may be disposed on the convex portion. With such a configuration, the space above the heat insulation box can be effectively used, and it is not necessary to house the control board storage portion in the heat insulation box. Thereby, the heat insulation efficiency of a refrigerator can be improved and the internal volume efficiency of a refrigerator can be improved. In addition, since the air taken into the machine room and the exhaust from the machine room are flowing in front of the machine room, the heat dissipation efficiency from the control board storage area can be improved, and the reliability of the control board can be improved. Can do.

In the refrigerator according to the example of the embodiment of the present disclosure, the convex portion may be disposed adjacent to the machine room. With such a configuration, it is possible to minimize the region configured at a position higher than the upper surface of the heat insulating box. Thereby, the visibility of the convex part from the front at the time of use of a refrigerator can be reduced, and the external appearance quality of a refrigerator can be improved.

Further, the refrigerator according to an example of the embodiment of the present disclosure may be configured such that the height of the upper surface of the convex portion and the upper surface of the machine room cover are substantially the same. With such a configuration, parts and the like can be arranged in the space above the heat insulating box to the maximum without increasing the overall height of the refrigerator. Thereby, in the same refrigerator dimension, the volumetric efficiency of the refrigerator can be maximized. Moreover, since the air path resistance above the machine room cover and the air path resistance above the convex part can be made substantially equal, air passing over the machine room cover and the convex part can be minimized. It is possible to minimize the rise of the machine room temperature.

Moreover, the refrigerator according to an example of the embodiment of the present disclosure may be provided with a louver in the opening. Moreover, the refrigerator according to an example of the embodiment of the present disclosure may include a plurality of guide plates that are inclined so that the louver directs the air in the machine room toward the front of the machine room. With such a configuration, a forward dynamic pressure can be applied to the air discharged from the machine room. In addition, the front air can be preferentially introduced into the machine room. Thereby, using the space above the refrigerator, outside air having a low front temperature can be taken into the machine room, and the compressor can be efficiently dissipated.

Further, in the refrigerator according to an example of the embodiment of the present disclosure, the upper surface of the louver (the upper surface formed by a plurality of guide plates) may be inclined downward toward the front. With such a configuration, since the forward opening area is increased, the pressure loss when passing through the opening can be minimized, the air volume can be increased, and the compressor can be radiated more efficiently.

Further, in the refrigerator according to an example of the embodiment of the present disclosure, a convex wall may be provided on a part of the outer peripheral portion of the opening. With such a configuration, even if the blower is attached in a direction in which air flows in the left-right direction, the air discharged from the opening hits the convex wall and turns forward. Thereby, discharge air can be sent more smoothly ahead of a refrigerator. Furthermore, with such a configuration, even when the upper part of the refrigerator is viewed from the side of the refrigerator, it is difficult to see the guide plate, so that the appearance quality of the refrigerator can be improved.

FIG. 1 is a vertical cross-sectional view of the upper part of the refrigerator according to the first embodiment of the present disclosure. FIG. 2 is an exploded perspective view of the upper machine room of the refrigerator in the first embodiment of the present disclosure. FIG. 3 is an exploded perspective view of the machine room cover of the refrigerator in the first embodiment of the present disclosure. 4 is a cross-sectional view taken along line 4-4 of FIG. 3 of the refrigerator according to the first embodiment of the present disclosure. FIG. 5 is a cross-sectional view taken along line 5-5 of FIG. 1 of the refrigerator according to the first embodiment of the present disclosure. FIG. 6 is a vertical cross-sectional view of the upper part of the refrigerator according to the second embodiment of the present disclosure. FIG. 7 is a perspective view of the upper part of the refrigerator according to the second embodiment of the present disclosure. FIG. 8 is a perspective view of the conventional refrigerator as viewed from above.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Note that the present disclosure is not limited to the following embodiments.

(Embodiment 1)
FIG. 1 is a vertical cross-sectional view of the upper part of the refrigerator according to the first embodiment of the present disclosure. FIG. 2 is an exploded perspective view of the upper machine room of the refrigerator in the first embodiment of the present disclosure. In FIG. 1, the right side is the front side of the refrigerator 30, and the left side is the back side of the refrigerator 30.

As shown in FIG. 1, the refrigerator 30 according to the first embodiment of the present disclosure includes a heat insulating box 31. The heat insulation box 31 is composed of an outer box 32 mainly using a steel plate and an inner box 33 formed of a resin such as ABS resin. Between the outer box 32 and the inner box 33 of the heat insulating box 31, as a heat insulating material, for example, a foam heat insulating material 34 such as hard foamed urethane is filled. Insulated. Further, a vacuum heat insulating material 35 having a heat insulating performance higher than that of the foam heat insulating material 34 is attached to the inside of the outer box 32 of the heat insulating box 31 in a form of being embedded in the foam heat insulating material 34. With such a configuration, the heat insulating performance of the heat insulating box 31 can be further enhanced. The heat insulation box 31 has an upper machine room (machine room) 36 in the upper part of the back surface. The upper machine room 36 is disposed in a step formed by denting the rear end of the top surface of the refrigerator 30 and the upper end of the back surface inside the refrigerator 30.

As shown in FIG. 2, an air-cooled condenser 37, a blower 38, and a compressor 39 are installed in the upper machine chamber 36 in order from the windward side (front side in FIG. 2). When the blower 38 is driven, the air-cooled condenser 37 and the compressor 39 are air-cooled.

The blower 38 is attached to the blower fixing member 40. The blower fixing member 40 divides the air path in the upper machine chamber 36 into an upwind side and a downwind side of the blower 38. In addition, a bypass air passage 41 through which the outside air directly sucked into the blower 38 passes without passing through the air-cooled condenser 37 is formed above the air-cooled condenser 37. The bypass air passage 41 supplies the outside air directly to the blower 38 when the air-cooled condenser 37 is blocked due to dust adhesion or the like. The bypass air passage 41 desirably has a space of 5 to 15 mm corresponding to a height of about 10% to 15% of the air-cooled condenser 37. When the height of the bypass air passage 41 is less than 5 mm (10%), the air volume is significantly reduced when the air-cooled condenser 37 is completely blocked. On the other hand, when the height of the bypass air passage 41 is higher than 15 mm (15%), the amount of air passing through the air-cooled condenser 37 is reduced, and sufficient heat dissipation capability cannot be obtained.

Thus, the refrigerator 30 has a structure that assumes a case where the air-cooled condenser 37 is closed due to dust adhesion or the like. By having such a structure, the reliability of the refrigerator 30 can be ensured in the future even in a situation where maintenance is not performed in a general household or the like.

<1-1. Configuration of machine room cover>
FIG. 3 is an exploded perspective view of the machine room cover of the refrigerator in the first embodiment of the present disclosure.

As shown in FIGS. 2 and 3, the machine room cover 42 that covers the upper machine room 36 is located on the windward side of the steel plate cover 43 that is made of a steel plate and covers the central part of the upper machine room 36 and the blower 38. It consists of an installed leeward cover 44 and an leeward cover 45 installed on the leeward side.

The windward cover 44 includes a windward resin cover 46 and a windward louver (louver) 47. As shown in FIG. 3, the windward resin cover 46 includes a carrying grip 48, a top surface 49, and a back surface 50. The windward louver 47 is attached to a position where the top surface portion 49 of the windward resin cover 46 is covered. The windward resin cover 46 and the windward louver 47 are formed by, for example, injection molding. The windward louver 47 is fitted and fixed to the windward resin cover 46 by, for example, a claw. The windward louver 47 may be formed of other materials such as metal, and is fixed to the windward resin cover 46 by screw fixing or the like as necessary.

As shown in FIG. 3, the top surface portion 49 of the windward resin cover 46 is provided with a top surface opening (opening) 49a, and the back surface portion 50a of the windward resin cover 46 is provided with a back surface opening 50a. It has been. External air can be taken into the upper machine chamber 36 from the top opening 49a and the back opening 50a. The back surface opening 50a has, for example, a plurality of slit shapes having a width of about 5 mm. The top surface opening 49a has a shape in which each of the openings is as large as possible, leaving a minimum area of the top surface portion 49 that ensures the twist and tensile strength of the top surface 49. For example, as shown in FIG. 3, the top surface opening 49 a is provided with four quadrangular holes in the top surface portion 49 so that opposite sides of the outer periphery of the top surface portion 49 are joined by a belt-shaped portion having a width of about 15 mm. Alternatively, it may be formed by providing four triangular holes in the top surface portion 49 so that the diagonals of the top surface portion 49 are coupled to each other. By setting the size of one side of the opening of the top surface opening 49a to 5 mm or more, clogging of the opening due to dust can be suppressed. With such a configuration, performance can be ensured without frequently cleaning the opening. Accordingly, dust adheres to the inside of the upper machine chamber 36. However, as described above, there is no problem because reliability can be ensured by securing an appropriate amount of dimension between components.

Further, the back side (rear side) of the top surface portion 49 and the upper side of the back surface portion 50 are recessed to the inside of the refrigerator 30 to form a space in which a palm for gripping the transport grip portion 48 enters.

The leeward cover 45 is substantially symmetrical with the leeward cover 44. The leeward cover 45 includes a leeward resin cover 51 and a leeward louver (louver) 52. As shown in FIG. 3, the leeward resin cover 51 includes a transport grip 48, a top surface 49, and a back surface 50. The top surface portion 49 of the leeward resin cover 51 is also provided with a top surface opening portion (opening portion) 49 a, and the back surface portion 50 a of the leeward resin cover 51 is also provided with a back surface opening portion 50 a. In the refrigerator 30 according to the present embodiment, the top surface openings 49 a are provided on the top surface 49 of the windward resin cover 46 and the top surface 49 of the leeward resin cover 51, that is, on the left and right surfaces of the upper machine chamber 36. Yes. The leeward louver 52 is attached to a position of the leeward resin cover 51 that covers the top surface portion 49.

<1-2. Louver shape>
4 is a cross-sectional view of the refrigerator according to the first embodiment of the present disclosure, taken along line 4-4 of FIG. In the refrigerator 30 according to the present embodiment, the windward louver 47 has a configuration that is substantially symmetrical with the leeward louver 52, and hence the leeward louver 52 is taken as an example in the following description. The shape will be described.

As shown in FIG. 4, the leeward louver 52 has a plurality of guide plates 53 arranged in parallel to each other. Each of the plurality of guide plates 53 has a shape inclined toward the front of the refrigerator 30 (that is, each of the plurality of guide plates 53 extends from the state where each of the plurality of guide plates 53 stands perpendicular to the horizontal plane to the front side of the refrigerator 30. In an inclined state, they are arranged on the leeward louver 52) and are aligned with a constant distance d. The distance d between the guide plates 53 is preferably about 5 mm. In order to minimize the pressure loss of the wind path of the leeward louver 52, it is desirable that the distance d between the guide plates 53 is large. However, if the distance d is 5 mm or more, a child's finger enters, so high-temperature air cooling. There is a risk of touching the condenser 37 or the blades of the rotating blower 38. As described above, the distance d (opening) is desirably 5 mm or more from the viewpoint of suppressing clogging due to dust adhesion. Therefore, by setting the distance d between the guide plates 53 to about 5 mm, it is possible to ensure performance while ensuring safety.

Further, since the guide plates 53 are arranged to be inclined forward, the planar projection distance d ′ between the guide plates 53 is configured to be 0 to 1 mm or less. If the planar projection distance d ′ between the guide plates 53 is greater than 1 mm, the fire may spread from the upper machine room 36 to the heat insulating box 31 due to the sparks flying from the outside of the refrigerator 30 during a house fire. Since the heat insulation box 31 composed of the foam heat insulating material 34 and the like is easily burnt, there is a risk of increasing the damage of a house fire. On the other hand, when the planar projection distance d ′ between the guide plates 53 is smaller than 0 mm (that is, there is a portion where the planar projections between the guide plates 53 overlap in the vertical direction), the molding die cannot be simply removed from the top and bottom. Therefore, the molding cost is increased.

It should be noted that the forward inclination θ (see FIG. 4) of the guide plate 53 is preferably 45 ° or less with respect to the horizontal plane. This is because when the exhaust of the upper machine chamber 36 discharged from the gap of the guide plate 53 hits the ceiling where the refrigerator 30 is installed, the angle formed with the horizontal is reduced, so that the front of the refrigerator 30 can be made smoother. This is because the direction can be changed.

Further, as shown in FIG. 4, the adjacent guide plates 53 are arranged such that the back side guide plate 53 of the refrigerator 30 is positioned higher than the front side guide plate 53. With such a configuration of the guide plate 53, the upper surface of the leeward louver 52 has a shape that is inclined downward toward the front as a whole.

Furthermore, as shown in FIG. 3, the windward louver 47 and the leeward louver 52 have a convex wall 54 on a part of the outer peripheral portion of the top surface opening 49a, in the present embodiment, on the side surface side of the refrigerator 30. The convex wall 54 has a depth length extending from the frontmost part to the rearmost part of the guide plate 53. The convex wall 54 is configured such that the upper surface is located at substantially the same height as the uppermost portion of the guide plate 53 and is substantially horizontal. The left and right side surfaces of the convex wall 54 are inclined from the inside to the outside of the refrigerator 30, and a moderate R is provided at the corner connecting the side surface and the top surface. The width of the convex wall 54 only needs to have an inner dimension that does not cause a problem in injection molding, and is preferably as narrow as possible so that the width of the guide plate 53 can be secured large.

<1-3. Height relationship of each part>
As shown by a broken line in FIG. 2, the machine room cover 42 is formed by integrating a steel plate cover 43, an upwind resin cover 46, an upwind louver 47, an upwind resin cover 51, and an upwind louver 52, It fixes to the heat insulation box 31 with a screw etc. so that the upper machine room 36 may be covered.

The upper surface of the steel plate cover 43 is the highest surface in the machine room cover 42 in a state where the machine room cover 42 is attached to the heat insulation box body 31 and is higher than the upper surface of the heat insulation box body 31. Further, the upper surface of the steel plate cover 43, the upper surface of the carrying grip portion 48, the uppermost portion of the guide plate 53, and the upper surface of the convex wall 54 are substantially the same height. Further, the lowermost part of the guide plate 53, the top surface opening 49a, and the upper surface of the heat insulating box 31 are substantially the same height. The upper surface of the steel plate cover 43 is configured to be substantially horizontal. Thereby, the guide plate 53 becomes a structure which sinks toward the front side from the refrigerator 30 back side between the steel plate cover 43 and a convex wall. Further, the width dimension of the guide plate 53 (the width dimension in the left-right direction of the refrigerator 30) is substantially the same as the width dimension of the transport grip 48.

The top surface opening 49a may be provided lower than the upper surface of the heat insulating box 31 as long as an appropriate dimension that does not hit the parts arranged in the upper machine chamber 36 can be secured. As long as a minute space that increases the pressure loss between them is not formed, the guide plate 53 may be provided up to the position.

<1-4. Thermal insulation box configuration>
FIG. 5 is a cross-sectional view taken along line 5-5 of FIG. 1 of the refrigerator according to the first embodiment of the present disclosure.

The vacuum heat insulating material 35 provided between the outer box 32 and the inner box 33 includes a rear vacuum heat insulating material 35 a attached to the rear side of the outer box 32 and a side surface attached to the side surface of the outer box 32. And a vacuum heat insulating material 35b. On the left and right corners of the back surface of the outer box 32, a step is provided and a recess 55 is formed. The recess 55 is formed outside the back vacuum heat insulating material 35 a on the back surface of the outer box 32, and the left and right ends of the back vacuum heat insulating material 35 a are positioned outside the side surface of the inner box 33. The recess 55 is formed on the rear side of the side surface vacuum heat insulating material 35 b on the side surface side of the outer box 32, and the rear end of the side surface vacuum heat insulating material 35 b is located on the rear side of the back surface of the inner box 33.

<1-5. Effect>
About the refrigerator 30 comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

First, the operation of the refrigerator 30 and the heat generation and exhaust heat of the upper machine room 36 will be described.

When the compressor 39 starts to be driven to cool the refrigerator 30, the refrigerant of the refrigeration cycle is compressed, and the refrigerant passes through a discharge refrigerant pipe (not shown) connected to the discharge port of the compressor 39, and is an air-cooled condenser. 37. As a result, the compressor 39 and the air-cooled condenser 37 generate heat. When the blower 38 is driven, the windward side of the upper machine chamber 36 has a negative pressure, and the outside air flows from the windward louver 47 and the windward resin cover 46 to the top opening 49a or the back opening 50a. And is taken into the upper machine room 36. The air-cooled condenser 37 and the compressor 39 are cooled by the taken-in air. On the contrary, the warmed air is supplied from the rear opening 50a or the top opening 49a provided in the leeward resin cover 51, and the leeward louver 52. And is discharged again out of the upper machine room 36. In this way, excessive temperature rise of the air-cooled condenser 37 and the compressor 39 is suppressed, and the reliability of the refrigerator 30 is ensured.

Generally, since warm air has the property of flowing upward, the air discharged to the outside of the upper machine room 36 tends to flow upward. In particular, when the refrigerator 30 is installed in a limited space such as a system kitchen, the left and right side surfaces and the back surface of the refrigerator 30 may be installed close to the wall, and the warm exhausted from the upper machine room 36 may occur. Air tends to stay above the upper machine chamber 36. At this time, since the windward side of the upper machine chamber 36 has a negative pressure due to the drive of the blower 38, the warm air staying above the upper machine chamber 36 is directly introduced from the windward cover 44 into the upper machine chamber 36. Will be. When the temperature of the introduced air is high, the heat radiation amount of the air-cooled condenser 37 and the compressor 39 is reduced, the temperature of the components is increased, and there is a possibility that a problem that reliability cannot be ensured may occur.

Next, the exhaust heat in the upper machine room 36 will be described.

In the present disclosure, a leeward louver 52 having a plurality of guide plates 53 is attached to a top surface opening 49 a provided in the leeward resin cover 51. As shown in FIG. 4, each of the plurality of guide plates 53 is provided on the leeward louver 52 so as to incline forward (a state in which the guide plate 53 inclines forward from a state in which it stands in the vertical direction). With such a configuration, a forward dynamic pressure can be applied to the air discharged from the upper machine chamber 36. Thereby, it is suppressed that warm air retains above the upper machine room 36, and warm air can be sent ahead of the refrigerator 30. Moreover, it can suppress that the warm air discharged | emitted from the upper machine room 36 is introduced into the upper machine room 36 from an upwind cover as it is, and can improve the reliability of the refrigerator 30.

Similarly, an upwind louver 47 having a plurality of guide plates 53 is attached above the top surface opening 49 a provided in the upwind resin cover 46. With such a configuration, the air in front of the windward cover 44 can be preferentially introduced into the upper machine chamber 36. Thereby, the air above the upper machine room 36 can be prevented from being introduced into the upper machine room 36. That is, it is possible to suppress the warm air exhausted from the upper machine chamber 36 and staying therein, and the warm air above the upper machine chamber 36 heated through the steel plate cover 43 from being introduced into the upper machine chamber 36, and air cooling. The temperature of the condenser 37 and the compressor 39 can be lowered.

Further, the windward louver 47 and the leeward louver 52 have a shape that is inclined downward toward the front as a whole (in other words, the windward louver 47 and the leeward louver 52 are respectively arranged from the rear side to the front side. With a gradually decreasing slope). With such a configuration, the opening areas of the windward louver 47 and the leeward louver 52 when viewed from the front of the refrigerator 30 can be increased. Therefore, with such a configuration, the pressure loss of the air flowing through the upper machine chamber 36 can be reduced, and the amount of air flowing through the upper machine chamber 36 can be increased. By increasing the amount of air flowing through the upper machine chamber 36, the heat radiation of the air-cooled condenser 37 and the compressor 39 is further promoted, the temperature of the components can be lowered, and the reliability can be further improved.

Further, since the amount of air flowing through the upper machine chamber 36 is increased, a forward flow is dominant in the air flow in front of the leeward cover 45 above the heat insulating box 31. As a result, the ambient air follows the flow, and the warm air discharged from the rear opening 50a provided in the leeward resin cover 51 is also lifted up above the upper machine chamber 36 by gravity. It becomes easy to flow to the front of the refrigerator 30 together with the air discharged from 52.

Furthermore, the lowermost part of the leeward louver 52 and the upper surface of the heat insulation box 31 have substantially the same height, so that the air discharged from the leeward louver 52 extends along the upper surface of the heat insulation box 31 by the Coanda effect. Easy to flow. Thereby, it can suppress that warm air flows upward and stays, and returns to the upper machine room 36 from the wind-up cover 44 as it is.

Next, the effect of the convex wall 54 provided in each of the leeward louver 47 and the leeward louver 52 will be described.

As shown in FIG. 2, the blower fixing member 40 partitions the upper machine room 36 in the left and right directions, and the blower 38 is mounted in the upper machine room 36 so that air flows in the left and right direction of the refrigerator 30. Therefore, since the leeward air has a flow velocity in the left-right direction, when it is discharged from the leeward louver 52, it strikes the convex wall 54, so that the lateral flow is smoothly converted to the forward direction. If there is no convex wall 54, the horizontal flow is discharged to the side of the refrigerator 30 as it is. The flow discharged to the side of the refrigerator 30 hits the side wall of the installation space of the refrigerator 30, flows toward the ceiling of the installation space, stays above the refrigerator 30, and again stays in the upper machine room from the upwind cover 44. 36 may be introduced.

Further, since the windward louver 47 and the leeward louver 52 are provided with a plurality of guide plates 53 at a position higher than the upper surface of the heat insulating box 31, when there is no convex wall 54, the guide plates from the side of the refrigerator 30. 53 will be seen and the external appearance of the refrigerator 30 will be impaired. By providing the convex wall 54, the wall surface of the convex wall 54 can be seen from the side of the refrigerator 30, and the guide plate 53 cannot be seen. Therefore, a clean design can be realized.

In particular, when the left and right outer side surfaces of the convex wall 54 are inclined toward the inside of the refrigerator and a gentle R is provided at the corner connecting the side surface and the upper surface, when looking up from the side of the refrigerator 30, Since the visible area of the convex wall 54 can be minimized, a cleaner design can be realized.

In addition, since the leeward louver 47 and the leeward louver 52 have substantially left-right symmetric shapes, common parts may be used as long as they can be aligned with peripheral parts. When common parts are used for the leeward louver 47 and the leeward louver 52, the number of parts managed in the assembly process can be reduced, so that the fixed cost can be reduced, and a cheaper product can be provided accordingly. it can.

Next, the function and effect of the height relationship of the top surface arrangement member of the refrigerator 30 will be described.

The upper surface of the steel plate cover 43 is substantially horizontal and is the highest surface in the machine room cover 42. The guide plate 53 is configured to sink from the rear surface side of the refrigerator 30 to the front surface side between the steel plate cover 43 and the convex wall (a plurality of guide plates 53 are positioned forward). By providing the guide plate 53 below the guide plate 53 positioned at the rear, the plurality of guide plates 53 as a whole are configured to have an inclination in which the front side gradually becomes lower than the rear side). As described above, the warm air has a property of flowing upward, and the upper surface of the guide plate 53 is at a position lower than the upper surface of the steel plate cover 43. Therefore, an upward force acts on the exhaust discharged from the leeward louver 52, and the steel plate cover It also tries to flow above 43. However, the upper surface of the steel plate cover 43 (that is, the upper surface of the machine room cover 42) is close to the ceiling of the installation space of the refrigerator 30, and the space between the upper surface and the ceiling of the heat insulating box 31 is the upper surface and the ceiling of the steel plate cover 43. It is wider than the space (see FIG. 1). With such a configuration, the air path resistance above the steel plate cover 43 is increased, and warm exhaust gas that is about to rise can be guided to the front of the refrigerator 30 above the heat insulating box 31. Further, even in the windward direction of the upper machine room 36, the air in front of the upper machine room 36 can be introduced into the upper machine room 36 with priority over the air above the steel plate cover 43 by the same action. Therefore, the compressor 39 can be efficiently radiated by the outside air having a low temperature in front of the refrigerator 30.

Furthermore, the guide plate 53 is provided between the steel plate cover 43 and the convex wall 54, and the guide plate 53 is provided below the steel plate cover 43 and the convex wall 54. With such a configuration, even when an object is placed on the refrigerator 30, the object is supported by the steel plate cover 43 and the convex wall 54, and the upper surface of the guide plate 53 is not easily blocked by the object. Therefore, with such a configuration, the amount of air flowing through the upper machine room 36 can be secured, and the reliability of the refrigerator 30 can be maintained. Further, with such a configuration, even if the height of the refrigerator 30 is substantially equal to the height of the ceiling, the reliability of the refrigerator 30 is maintained using the space above the heat insulating box 31. Can do.

Next, the arrangement effect of the vacuum heat insulating material 35 will be described.

As shown in FIG. 5, the left and right ends of the back vacuum heat insulating material 35 a are located outside the side surface of the inner box 33, and the rear end of the side heat insulating material 34 b is located behind the back surface of the inner box 33. . Thus, the vacuum heat insulating material 35 covers substantially the entire side surface and back surface of the inner box 33.

Generally, since the heat insulation performance of the vacuum heat insulating material is higher than that of the foam heat insulating material, the heat of the outside air enters the inside of the refrigerator 30 as compared with the case where the foam heat insulating material is disposed outside the vacuum heat insulating material. The effect of suppressing this is great.

In the refrigerator 30 according to the present embodiment, the recess 55 is formed outside the back vacuum heat insulating material 35a on the back surface of the outer box 32, and is formed behind the side heat insulating material 34b on the side surface of the outer box 32. ing. With such a configuration, the vacuum heat insulating material 35 can be attached to the outer box 32 without being bent or recessed. Thereby, it can suppress that quality falls by the vacuum heat insulating material 35 being torn or peeling. Also, with such a configuration, the work of attaching the vacuum heat insulating material 35 to the outer box 32 can be simplified, the number of assembling steps can be reduced, and the productivity can be improved.

On the other hand, in the refrigerator 30 having the heat generating components such as the compressor 39 and the air-cooled condenser 37 in the upper machine room 36, the recess 55 serves to send air having a relatively low temperature below the refrigerator 30 to the upper machine room 36. Fulfill. The low-temperature air that has passed through the recess 55 and has been delivered to the upper side of the refrigerator 30 passes through the rear opening 50 a and is sent into the upper machine room 36, and can be used for heat dissipation of the compressor 39 and the air-cooled condenser 37.

In recent years, along with the evolution of the distribution industry and the increase in working together, the tendency to bulk purchase has progressed, and the demand for the refrigerator's internal volume has been increasing year by year. In addition, there is a growing market need to expand the refrigerator internal volume without increasing the refrigerator installation space. The needs can be met by enlarging the inner box 33 without enlarging the outer box 32. However, when the inner box 33 is enlarged, the cross-sectional area of the recess 55 is further reduced.

In this respect, in the refrigerator 30 of the present embodiment, as described above, the cold air that cools the upper machine room 36 is used from the front side of the refrigerator 30 to the inside of the upper machine room 36 using the space above the heat insulating box 31. Can be taken out and discharged to the front side. Therefore, in the refrigerator 30 according to the present embodiment, since intake and exhaust on the back surface or side surface of the refrigerator 30 are not required, the refrigerator 30 is installed with the side surface and back surface of the refrigerator 30 close to a wall of a house room or the like. Even if it assumes that it is carried out, the recessed part 55 can be made small. Therefore, the refrigerator 30 of the present disclosure can increase the internal volume of the refrigerator 30 without increasing the installation space.

<Summary of Embodiment 1>
As described above, the refrigerator 30 according to the first embodiment of the present disclosure is arranged in the upper machine room (machine room) 36 installed in the step provided in the upper back of the heat insulating box 31 and the upper machine room 36. The compressor 39 and the air blower 38 provided, the machine room cover 42 which covers the upper machine room 36, and the top | upper surface opening part (opening part) 49a provided in the upper surface left and right of the upper machine room 36 are provided. A windward louver (louver) 47 and a leeward louver (louver) 52 are provided in the top surface openings 49a provided on the left and right sides of the upper surface of the upper machine room 36, respectively. The windward louver 47 and the leeward louver 52 each have a plurality of guide plates 53 that are inclined so as to send air in front of the upper machine chamber 36. Specifically, the plurality of guide plates 53 are respectively provided on the leeward louver 47 and the leeward louver 52 in a state where the plurality of guide plates 53 are tilted forward from a state in which they are erected in the vertical direction.

With such a configuration, it is possible to apply dynamic pressure toward the front of the refrigerator 30 to the air discharged from the upper machine room 36, and the air in the front of the refrigerator 30 is more than the air above the upper machine room 36. It can be preferentially introduced into the upper machine room 36. Therefore, the compressor 39 can be efficiently radiated by the outside air in front of the refrigerator 30 using the space above the heat insulating box 31. In addition, with such a configuration, the refrigerator 30 can be installed by placing the back and side surfaces of the refrigerator 30 against the wall, so the installation space for the refrigerator 30 can be reduced in a limited space such as a house. Can do.

Further, the refrigerator 30 of the present embodiment is configured such that the upper surfaces of the windward louver 47 and the leeward louver 52 configured by the plurality of guide plates 53 are inclined downward toward the front. With such a configuration, the opening areas of the windward louver 47 and the leeward louver 52 when the refrigerator 30 is viewed from the front can be increased. Thereby, the pressure loss of the air flowing through the upper machine chamber 36 can be reduced, the air volume flowing through the upper machine chamber 36 can be increased, and the compressor 39 can be radiated more efficiently.

Further, the refrigerator 30 of the present embodiment is provided with a convex wall 54 on the side surface side of the refrigerator 30 of the windward louver 47 and the leeward louver 52. With such a configuration, even when the blower 38 is mounted in a direction in which air flows in the left-right direction of the refrigerator 30, when the air is discharged from the leeward louver 52, it strikes the convex wall 54, so that the horizontal flow is smooth. Will be converted to forward. Thereby, discharge air can be sent more smoothly to the refrigerator 30 front. Furthermore, since the guide plate 53 is difficult to see when the upper part of the refrigerator 30 is viewed from the side of the refrigerator 30, the appearance quality of the refrigerator 30 can be improved.

In the refrigerator 30 of the present embodiment, the upper surface of the leeward louver 52 is located at a position lower than the upper surface of the steel plate cover 43. With such a configuration, the upper surface of the steel plate cover 43 is close to the ceiling of the installation space of the refrigerator 30, and the front of the leeward louver 52 has a wide space from the heat insulating box 31 to the ceiling. With such a configuration, the air path resistance above the steel plate cover 43 is relatively large (compared to the upper side of the heat insulating box 31), and warm exhaust gas that is about to rise can be guided to the front of the refrigerator 30. . Thereby, it can suppress that the warm air discharged | emitted from the upper machine room 36 is introduced into the upper machine room 36 from the windward cover 44 as it is, and can improve the reliability of the refrigerator 30. FIG.

In the refrigerator 30 of the present embodiment, the upper surface of the machine room cover 42 is higher than the upper surface of the heat insulating box 31, and the top surface opening 49 a is arranged at a position lower than the upper surface of the machine room cover 42. With such a configuration, the upper surface of the machine room cover 42 is close to the ceiling of the space where the refrigerator 30 is installed, and the space between the upper surface of the heat insulating box 31 and the ceiling is widened. Therefore, with such a configuration, the air path resistance above the machine room cover 42 increases, and the exhaust of the warm upper machine room 36 that is going to rise is guided to the front of the refrigerator 30 above the heat insulating box 31. be able to. Further, with such a configuration, the air in front of the refrigerator 30 can be introduced into the upper machine room 36 in preference to the air above the machine room cover 42. Therefore, by using the space above the heat insulating box 31, outside air having a low temperature in front can be taken into the upper machine chamber 36, and the compressor 39 can be radiated efficiently. Thereby, the back surface and side surface of the refrigerator 30 can be installed against the wall, and the installation space of the refrigerator 30 can be reduced in a limited space such as a house.

Furthermore, with such a configuration, even when an object is placed on the refrigerator 30, the object is supported by the machine room cover 42 so that the top surface opening 49 a is not easily blocked. The amount of air flowing through can be secured, and the reliability of the refrigerator 30 can be maintained. Therefore, with such a configuration, even if the height of the refrigerator 30 is substantially equal to the height of the ceiling, the reliability of the refrigerator 30 can be maintained using the space above the heat insulating box 31. it can.

Further, an upwind louver 47 and a downwind louver 52 are provided above the top surface opening 49a. The windward louver 47 and the leeward louver 52 each have a plurality of guide plates 53 that send air to the front of the upper machine chamber 36. With such a configuration, it is possible to apply a forward dynamic pressure (toward the front of the refrigerator 30) to the air discharged from the upper machine chamber 36. Further, with such a configuration, the air in front of the refrigerator 30 can be preferentially introduced into the upper machine room 36 over the air above the upper machine room 36. Therefore, the compressor 39 can be efficiently radiated by the outside air having a low temperature in front of the refrigerator 30.

(Embodiment 2)
FIG. 6 is a vertical cross-sectional view of the upper part of the refrigerator according to the second embodiment of the present disclosure. FIG. 7 is a perspective view of the upper part of the refrigerator according to the second embodiment of the present disclosure.

In the second embodiment of the present disclosure, the same reference numerals or the same names are used for portions to which the same configuration and the same technical idea as in the first embodiment can be applied, and the detailed description thereof is omitted. Moreover, as long as there is no malfunction, it is possible to apply each structure or function of Embodiment 2 in combination with each structure or function of Embodiment 1.

<2-1. Control board storage unit configuration>
As illustrated in FIGS. 6 and 7, the refrigerator 60 according to the second embodiment of the present disclosure includes a control board storage unit (convex portion) 61 on the upper surface of the heat insulating box 31 and in front of the machine room cover 42. Have. The control board storage unit 61 is covered with an outer shell member 62 and a board cover 63 mainly using a steel plate. The control board storage unit 61 contains a board 65 fixed to a board fixing member 64 molded from a resin such as PP (polypropylene).

The substrate fixing member 64 is fitted and fixed to the outer shell member 62 with, for example, a claw. The outer shell member 62 and the substrate fixing member 64 are components that are attached to the outer box 32 by inserting the protrusions of the substrate fixing member 64 into the notches formed in the outer box 32 and constitute the upper machine chamber 36. The screw is fixed to the screw. The outer shell member 62 and the substrate cover 63 are provided in order to prevent the fire from spreading to the heat insulating box 31 or the house when the substrate 65 is ignited. Even if a flame retardant resin or the like is used, the same effect can be obtained.

In the case where the outer shell member 62 is molded from a flame retardant resin, it is possible to have a structure integrated with the substrate fixing member 64. In this case, the number of parts can be reduced.

Also, since the bottom surface of the outer shell member 62 is in contact with the top surface of the outer box 32, the bottom surface can be reduced as long as the gap with the outer box 32 can be adjusted to prevent the spread of fire.

On the contrary, it is also possible to cut out the outer box 32 where the outer shell member 62 is disposed and form the outer shell member 62 as a part of the outer box 32. In this case, it is also possible to fix the control board storage unit 61 so as to be partially embedded in the heat insulating box 31.

According to such a configuration, even when the substrate 65 is high, the control substrate storage unit 61 can be attached above the heat insulating box 31 without increasing the product dimensions.

In a state where the control board storage unit 61 is attached to the heat insulation box 31, the upper surface of the substrate cover 63 is higher than the upper surface of the heat insulation box 31, the upper surface of the steel plate cover 43 of the machine room cover 42, and the carrying grip 48. , The uppermost part of the guide plate 53, and the upper surface of the convex wall 54 have substantially the same height. As in the first embodiment, the lowermost part of the guide plate 53 and the upper surface of the heat insulating box 31 are substantially the same height. The windward louver 47 and the leeward louver 52 constituted by a plurality of guide plates 53 are formed such that their upper surfaces are located at a height between the upper surface of the heat insulating box 31 and the upper surface of the machine room cover 42. ing.

The top surface vacuum heat insulating material 66 is affixed to the lower surface of the outer box 32 under the control board storage unit 61. When the control board storage unit 61 is fixed so as to be partially embedded in the heat insulation box 31, the top vacuum insulation material 66 is not damaged by the outer box 32, the outer shell member 62, or the board fixing member 64. It is necessary to smooth the surface of the component that directly touches the top surface vacuum heat insulating material 66 or to insert a spacer that does not directly touch the top surface vacuum heat insulating material 66.

The rearmost part of the control board storage unit 61 is adjacent to the machine room cover 42, and the foremost part is provided behind the front surface of the heat insulation box 31. Further, the width of the control board storage unit 61 (the width in the left-right direction of the refrigerator 60) is configured to be substantially the same as the width of the steel plate cover 43. Further, the control board storage 61 is formed on the upper surface of the heat insulating box 31 at least inside the portion where the guide plate 53 is disposed.

About the refrigerator 60 comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

As in the first embodiment, the upper surface of the steel plate cover 43 is substantially horizontal and is the highest surface in the machine room cover 42. The guide plate 53 is configured to sink from the back side of the refrigerator 60 to the front side between the steel plate cover 43 and the convex wall (the plurality of guide plates 53 are positioned forward). By providing the guide plate 53 below the guide plate 53 positioned rearward, the plurality of guide plates 53 as a whole are configured to have an inclination in which the front side gradually becomes lower than the rear side). With such a configuration, the upper surface of the steel plate cover 43 is close to the ceiling of the installation space of the refrigerator 60, and the space between the upper surface of the heat insulating box 31 and the ceiling is widened. Thereby, the air path resistance above the steel plate cover 43 increases, and warm exhaust gas that is about to rise can be guided to the front of the refrigerator 60 above the heat insulating box 31. Further, the air in front of the refrigerator 60 can be introduced into the upper machine chamber 36 in preference to the air above the steel plate cover 43 of the machine room cover 42. Therefore, with such a configuration, the compressor 39 can be efficiently dissipated by the outside air having a low temperature in front of the refrigerator 60.

Furthermore, the refrigerator 60 of the present embodiment has a control board storage portion 61 that protrudes upward from the upper surface of the heat insulating box 31 in front of the machine room cover 42. With this configuration, the exhaust gas guided to the upper surface of the heat insulating box 31 in front of the guide plate 53 passes through the front of the machine room cover 42 and is directly introduced from the windward louver 47 into the upper machine room 36. This can be suppressed. Thereby, since exhaust_gas | exhaustion can be delivered to the front of the refrigerator 60 and the air ahead of the refrigerator 60 can be introduce | transduced into the upper machine room 36, the thermal radiation efficiency of the compressor 39 can further be improved.

Further, the refrigerator 60 of the present embodiment is configured such that the upper surface of the substrate cover 63 is substantially the same height as the upper surface of the steel plate cover 43. With such a configuration, it is possible to secure the maximum volume of the control board storage unit 61 protruding above the heat insulating box 31 without increasing the height dimension of the refrigerator 60. Therefore, it can be said that the refrigerator 60 of the present embodiment has a shape with the highest volumetric efficiency utilizing the space above the heat insulating box 31 to the maximum extent. At the same time, in the refrigerator 60 of the present embodiment, the gap dimension from the upper surface of the substrate cover 63 to the ceiling and the gap dimension from the upper surface of the steel plate cover 43 to the ceiling are equal. The resistance and the air path resistance above the steel plate cover 43 are substantially equal. As a result, the distance between the refrigerator 60 and the ceiling can be minimized, the air flowing above the substrate cover 63 and the steel plate cover 43 can be minimized, and the temperature rise of the upper machine chamber 36 can be minimized. Can do.

At this time, in the refrigerator 60 of the present embodiment, a part or the whole of the control board storage unit 61 is configured outside the heat insulation box 31, so that the control board storage unit 61 needs to be stored in the heat insulation box 31. The heat insulation efficiency of the refrigerator 60 can be increased. Thereby, the internal volume efficiency of the refrigerator 60 can be improved. Further, by removing the step of the outer box 32 below the control board storage unit 61, the top vacuum heat insulating material 66 can be attached to the top surface of the outer box 32 as shown in FIG. During operation of the refrigerator 60, electricity flows through the substrate 65, the substrate 65 generates heat, and the heat load on the refrigerator 60 is increased. For this reason, generally, installing a vacuum heat insulating material having a heat insulating performance higher than that of the foam heat insulating material between the substrate 65 and the inside of the refrigerator 60 leads to a significant improvement in heat insulating efficiency. Further, by disposing the control board storage unit 61 outside the heat insulating box 31, the wall thickness under the control board storage unit 61 can be increased. Further, even if the top surface vacuum heat insulating material 66 is disposed on the inner surface of the outer box 32, a space through which the foam heat insulating material 34 flows can be secured between the top surface vacuum heat insulating material 66 and the inner box 33. With such a configuration, the heat insulating performance of the refrigerator 60 can be further enhanced, the inner box 33 can be supported by the foam heat insulating material 34, the deformation of the inner box 33 and the color change are suppressed, and the strength is increased. Can do. Therefore, while improving the quality in a store | warehouse | chamber, attachment of components, such as an air path and a shelf in a store | chamber, is made easy, and the deformation | transformation of the heat insulation box 31 can also be suppressed.

In addition, since the air taken into the upper machine chamber 36 and the exhaust from the upper machine chamber 36 are flowing in front of the upper machine chamber 36 by the action of the blower 38, the heat transfer on the surface of the control board storage unit 61 is performed. Is promoted, the heat dissipation efficiency can be increased, and the reliability of the substrate 65 can be improved.

Further, the control board storage unit 61 is installed so that its rearmost part is adjacent to the machine room cover 42, so that the position of the foremost part of the control board storage unit 61 is located as far as the rear side of the refrigerator 60. Thus, the control board storage 61 can be arranged. Also in the refrigerator 60 of the present embodiment, the foremost part of the control board storage unit 61 is provided behind the front surface of the heat insulation box 31, and the user of the refrigerator 60 stands in front of the refrigerator 60 and opens the door. The visibility of the control board storage 61 can be reduced. Thereby, the external appearance quality of the refrigerator 60 can be improved.

Further, in the refrigerator 60 of the present embodiment, the control board storage unit 61 is configured such that the width thereof is substantially the same as the width of the steel plate cover 43. Further, the control board storage 61 is formed on the upper surface of the heat insulating box 31 at least inside the portion where the guide plate 53 is disposed. With such a configuration, the visibility of the control board storage unit 61 from the side of the refrigerator 60 can also be reduced.

Further, in front of the guide plate 53 is a space through which cooling air of the upper machine chamber 36 flows. For this reason, if the control board accommodating part 61 is installed in front of the guide plate 53, the air path is obstructed, the amount of air flowing in the upper machine chamber 36 is reduced, and the heat dissipation performance is reduced. Therefore, by disposing the control board storage portion 61 on the inner surface of the top surface of the outer box 32 of the heat insulating box 31 from the portion where the guide plate 53 is disposed, it is possible to suppress a decrease in the air volume. Heat dissipation performance can be ensured.

As described above, the present disclosure provides a refrigerator capable of efficiently taking outside air into a machine room using the upper space of the refrigerator and discharging discharged air from the machine room to the front of the refrigerator. Therefore, it can be widely applied to industrial equipment that cools a heating element by forced air cooling, as well as refrigerators for home use and business use.

30, 60 Refrigerator 31 Heat insulation box 32 Outer box 33 Inner box 34 Foam insulation 35 Vacuum insulation 35a Back vacuum insulation 35b Side vacuum insulation 36 Upper machine room (machine room)
37 Air-cooled condenser 38 Blower 39 Compressor 40 Blower fixing member 41 Bypass air passage 42 Machine room cover 43 Steel plate cover 44 Windward cover 45 Windward cover 46 Windward resin cover 47 Windward louver 48 Carrying grip part 49 Top face part 49a Ceiling Surface opening (opening)
50 Back side 51 Downward resin cover 52 Downward louver 53 Guide plate 54 Convex wall 55 Concave 61 Control board storage part (convex part)
62 Outer shell member 63 Substrate cover 64 Substrate fixing member 65 Substrate 66 Top vacuum insulation

Claims

A machine room installed in a step provided at the upper back of the heat insulation box,
A compressor and a blower arranged in the machine room;
A machine room cover covering the upper surface of the machine room;
An opening provided on each of the upper left and right sides of the machine room,
The upper surface of the machine room cover is higher than the upper surface of the heat insulating box,
The refrigerator is arranged at a position lower than the upper surface of the machine room cover.
The refrigerator according to claim 1, wherein a convex portion is provided in front of the machine room.
The refrigerator according to claim 2, wherein a control board storage portion is disposed on the convex portion.
The refrigerator according to claim 2 or 3, wherein the convex portion is disposed adjacent to the machine room.
The refrigerator according to any one of claims 2 to 4, wherein a height of an upper surface of the convex portion and a height of the upper surface of the machine room cover are substantially the same.
The opening is provided with a louver,
The refrigerator according to any one of claims 1 to 5, wherein the louver includes a plurality of guide plates that are inclined so as to direct air in the machine room toward the front of the machine room.
The refrigerator according to claim 6, wherein an upper surface of the louver is inclined downward toward the front.
The refrigerator as described in any one of Claim 1 to 7 with which the convex wall is provided in a part of outer peripheral part of the said opening part.