JP6675058B2 - refrigerator - Google Patents

Description

  The present invention relates to the structure of a refrigerator having a machine room at a rear end of an upper surface of a main body.

  2. Description of the Related Art Conventionally, this type of refrigerator has a ventilation port provided on a side surface of a machine room to radiate heat from a cooling unit in the machine room (for example, see Patent Document 1).

  FIG. 8 is a rear perspective view of a machine room of a conventional refrigerator.

  As shown in FIG. 8, a machine room 11 formed by recessing the rear end of the upper surface of the refrigerator body 10, a machine room side wall portion 11 a located on both side surfaces of the machine room 11, and a cover 12 covering the machine room 11 The compressor 13 and the fan motor 14 are provided in the machine room 11, and the machine room side wall portion 11 a has a first side wall 15 having a plurality of holes, and a second side wall facing the first side wall 15. Even if the refrigerator body 10 is installed in close contact with the wall on the back side where the refrigerator body 10 is installed, holes provided on the side of the refrigerator allow intake and exhaust of outside air, and the machine room 11 This enables efficient cooling of the internal cooling unit.

JP 2007-17044 A

  However, in the above-described conventional configuration, when the refrigerator is installed close to or against the side wall, heat radiation from the side surface is hindered, and there is a problem that it is difficult to obtain a reliable heat radiation effect. In particular, when installing a refrigerator in a limited space such as a system kitchen, the refrigerator may be installed close to all the left and right sides and the back wall, and even in such a case, a configuration that can reliably dissipate heat is required. .

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and provides a refrigerator that efficiently suppresses a rise in the temperature of inhaled air and radiates heat efficiently with a simple configuration even when the refrigerator is installed with the side and back surfaces attached to a wall. The purpose is to:

In order to solve the above-mentioned conventional problems, a refrigerator of the present invention has a machine room provided with a step at an upper rear portion of a heat insulating box, a compressor and a blowing unit provided in the machine room, A machine room cover that covers an upper surface of the machine room, and openings provided on the left and right sides of the upper surface of the machine room, and a louver having a plurality of forward-facing guide plates is provided in the opening ; The upper surface is inclined downward toward the front . Thus, a forward dynamic pressure can be given to the air discharged from the machine room by the guide plate directed forward, and similarly, the front air can be preferentially introduced into the machine room. By utilizing this space, outside air with a low temperature in front can be taken into the machine room, and the compressor can be efficiently radiated heat. Further, since the upper surface of the louver is inclined downward toward the front, the forward opening area is increased, so that the pressure loss when passing through the opening is minimized, and the air volume is increased. The compressor can efficiently dissipate heat.

The refrigerator of the present invention can efficiently take in outside air into the machine room using the upper space of the refrigerator and discharge air discharged from the machine room to the front of the refrigerator, so that the refrigerator can be mounted on the rear and side walls of the house. The refrigerator can be installed in a limited space in a house, and the space for installing the refrigerator can be reduced.

Longitudinal sectional view of the refrigerator upper part in Embodiment 1 of the present invention. Exploded perspective view of the upper machine room in the embodiment. Exploded perspective view of a machine room cover according to the embodiment. A-A 'sectional view in FIG. B-B 'sectional view in FIG. Longitudinal sectional view of the refrigerator upper part in Embodiment 2 of the present invention Perspective view of upper part of refrigerator in the embodiment Back perspective view of conventional refrigerator

According to a first aspect of the present invention, there is provided a machine room provided with a step on an upper rear surface of a heat insulating box, a compressor and a blower provided in the machine room, and a machine room cover for covering an upper surface of the machine room. An opening provided on the left and right sides of the upper surface of the machine room, a louver having a plurality of guide plates facing forward is provided in the opening, and the upper surface of the louver is inclined downward forward. By doing so, the guide plate heading forward can apply a forward dynamic pressure to the air discharged from the machine room, and similarly, the front air can be preferentially introduced into the machine room. By utilizing the space above the refrigerator, the compressor can be efficiently radiated heat by the low temperature outside air in front of the refrigerator. Therefore, the refrigerator can be placed against the back and side walls of the house, and the space for installing the refrigerator can be reduced in the limited space of the house. Further, since the upper surface of the louver is inclined downward toward the front, the forward opening area is increased, so that the pressure loss when passing through the opening is minimized, and the air volume is increased. The compressor can efficiently dissipate heat.

According to a second aspect of the present invention, in the first aspect, a convex wall is provided on a part of an outer peripheral portion of the opening, so that even when the blower is mounted in a direction in which air flows in the left-right direction, the opening is formed. Since the air discharged from the refrigerator turns forward, the discharged air can be more smoothly sent to the front of the refrigerator. Further, the guide plate is difficult to see even when the upper part of the refrigerator is viewed from the side of the refrigerator, so that the appearance quality of the refrigerator can be improved.

In a third aspect based on the first or second aspect, the upper surface of the machine room cover is higher than the upper surface of the heat insulating box, and the opening is disposed at a position lower than the upper surface of the machine room cover. By this, it is possible to suppress the air discharged from the opening from passing above the machine room cover and being sucked into the machine room again from the other opening, so that the rise in the suction air temperature is reduced and the air is more efficiently compressed. The machine can dissipate heat.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited by the embodiment.

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of an upper portion of a refrigerator according to Embodiment 1 of the present invention, and FIG. 2 is an exploded perspective view of an upper machine room according to Embodiment 1.

In FIG. 1, a heat insulating box 31 of a refrigerator 30 is mainly composed of an outer box 32 made of a steel plate and an inner box 33 molded of a resin such as ABS. The inside and the surroundings are insulated by being filled with the foamed heat insulating material 34. Further, by attaching a vacuum heat insulating material 35 having higher heat insulating performance than the foam heat insulating material 34 to the inside of the outer box 32 so as to be embedded in the foam heat insulating material 34, the heat insulating performance of the heat insulating box 31 can be enhanced. The upper rear portion of the heat-insulating box 31 has an upper machine room 36 in a space formed by recessing the rear end of the top surface and the upper end of the rear surface inside the refrigerator 30.

  In FIG. 2, an air-cooled condenser 37, a blower 38, and a compressor 39 are installed in the upper machine room 36 in order from the windward side. By driving the blower 38, the air-cooled condenser 37 and the compressor 39 are air-cooled. You.

  The blower 38 is attached to a blower fixing member 40, and the blower fixing member 40 divides an air path in the upper machine room 36 into a windward side and a leeward side of the blower 38. In addition, a bypass air passage 41 is formed above the air-cooled condenser 37, through which outside air that is directly sucked into the blower 38 without passing through the air-cooled condenser 37 passes. When the air-cooled condenser 37 is closed due to dust adhesion or the like, the bypass air path 41 supplies the outside air directly to the blower 38, and corresponds to a height of about 10% to 15% of the air-cooled condenser 37. A space of 5 to 15 mm is desirable. When the height of the bypass air passage 41 is less than 5 mm (10%), the air flow is significantly reduced when the air-cooled condenser 37 is completely closed, and when the height of the bypass air passage 41 is higher than 15 mm (15%), the air-cooled condenser is not. The amount of air passing through 37 decreases, and a sufficient heat radiation capability cannot be obtained.

  As described above, by having a structure in which the case where the air-cooled condenser 37 is blocked due to dust adhesion or the like, 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.

<1-1. Configuration of Machine Room Cover>
FIG. 3 is an exploded perspective view of the machine room cover according to the embodiment.

  2 and 3, a machine room cover 42 that covers the upper machine room 36 includes a steel plate cover 43 that is made of a steel plate that covers a central portion, a windward cover 44 that is installed on the windward side of the blower 38, and a leeward side. The leeward cover 45 is provided.

  The windward cover 44 is made up of two parts, a windward resin cover 46 and a windward louver 47. The windward resin cover 46 has a shape including a grip portion 48 for transportation, a top surface portion 49, and a rear surface portion 50, and the windward louver 47 is attached to a position covering the top surface portion 49. Both the windward resin cover 46 and the windward louver 47 are injection-molded products, and the windward louver 47 is fitted into and fixed to the windward resin cover 46 by claws. Note that the windward louver 47 may be formed of another material such as a metal, and is fixed to the windward resin cover 46 with screws or the like as necessary.

  A top opening 49a is provided on a top 49 of the windward resin cover 46, and a rear opening 50a is provided on the back 50, so that outside air can be taken into the upper machine chamber 36. The back opening 50a has a plurality of slit shapes with a width of about 5 mm, and the top opening 49a increases in size while leaving a minimum area for securing the torsion and tensile strength of the top surface 49. It has a shape. For example, as shown in FIG. 3, quadrangular four holes are provided so that opposite sides of the outer periphery of the top surface portion 49 are joined by a band having a width of about 15 mm, or a triangular shape is formed so as to join diagonals. Four holes may be provided. When the size of one side of the opening is 5 mm or more, clogging of the opening due to dust can be suppressed, so that performance can be secured without frequently cleaning the opening. As a result, dust adheres to the machine room. However, as described above, there is no problem because the reliability can be secured by securing a proper dimension between components as described above.

  Further, the back side of the top surface portion 49 and the upper side of the back surface portion 50 are recessed inside the refrigerator, and form a space in which a palm gripping the holding portion 48 for transportation can enter.

  The leeward cover 45 has a configuration substantially symmetrical to the leeward cover 44, and includes a leeward resin cover 51 and a leeward resin cover 51 having a shape composed of a carrying grip portion 48, a top surface portion 49, and a back surface portion 50. The leeward louver 52 covers the top surface 49.

<1-2. Louver shape>
FIG. 4 is a sectional view taken along line AA ′ in FIG. The leeward louvers 47 have a substantially symmetrical configuration with the leeward louvers 52.

  In FIG. 4, the leeward louvers 47 and the leeward louvers 52 have a plurality of guide plates 53 arranged in parallel. Each of the guide plates 53 has a shape inclined toward the front of the refrigerator, and is arranged at a constant interval d. The distance d between the guide plates 53 is preferably about 5 mm. In order to minimize the pressure loss in the air path, it is desirable that the distance is large. However, if the distance is 5 mm or more, a child's finger enters, and there is a risk of touching the hot air-cooled condenser 37 or the blades of the rotating blower 38. Is unsafe. As described above, an opening of 5 mm or more is also desirable for suppressing clogging due to dust adhesion. Therefore, by setting the distance to 5 mm, performance can be ensured while ensuring safety.

  In addition, since the guide plate 53 is inclined forward, the plane projection distance d 'between the guide plates 53 is set to 0 to 1 mm or less. If it is larger than 1 mm, the fire spreads from the inside of the upper machine room 36 to the heat insulating box 31 due to sparks flying from outside the refrigerator in the event of a house fire. The heat-insulating box 31 composed of the foam heat-insulating material 34 and the like is liable to burn, which may lead to an increase in damage from a house fire. If it is smaller than 0 mm (that is, if there is a portion that overlaps in the vertical direction), the molding die cannot be simply punched up and down, so that the molding cost increases.

  The inclination θ of the guide plate 53 in the forward direction is desirably 45 ° or less with respect to the horizontal plane. This is because when the exhaust of the upper machine room 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 made smaller, so that the direction of the refrigerator 30 can be more smoothly turned forward. This is because it can be converted.

  The adjacent guide plates 53 are arranged so that the rear side of the refrigerator is higher than the front side, so that the entire louver has a shape that is inclined forward and downward.

  Furthermore, as shown in FIG. 3, the windward louver 47 and the leeward louver 52 have a convex wall 54 on the side of the refrigerator. The convex wall 54 has a depth that extends from the frontmost portion to the rearmost portion of the guide plate 53, and the upper surface is formed substantially horizontally at substantially the same height as the uppermost portion of the guide plate 53. 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 a corner connecting the side surface and the upper surface. The width of the convex wall 54 may have an inside dimension that does not cause a problem in injection molding, and it is desirable that the width be as narrow as possible so that the width of the guide plate 53 can be secured large.

<1-3. Height relation of each part>
As shown by the broken line in FIG. 2, the machine room cover 42 has a steel plate cover 43, a leeward resin cover 46, an leeward louver 47, a leeward resin cover 51, and a leeward louver 52 that are integrated with each other. The screw 36 is fixed to the heat insulating box 31 so as to cover the same.

The upper surface of the steel plate cover 43 is the highest surface of the machine room cover 42 when attached to the heat insulating box 31, and is higher than the upper surface of the heat insulating box 31, and the upper surface of the steel plate cover 43 and the upper surface of 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, and the lowermost part of the guide plate 53, the top opening 49a and the upper surface of the heat insulating box 31 have substantially the same height. Since the upper surface of the steel plate cover 43 is configured to be substantially horizontal, the guide plate 53 is configured to sink from the rear side of the refrigerator toward the front side between the steel plate cover 43 and the convex wall. The width of the guide plate 53 is substantially the same as the width of the carrying grip 48.

  The top opening 49a may be lower than the upper surface of the heat-insulating box 31 as long as it can secure an appropriate dimension that does not correspond to the component arrangement in the upper machine chamber 36, and the pressure loss between the top plate 49a and the guide plate 53 increases. Unless a minute space is created, the guide plate 53 may be raised.

<1-4. Insulated box configuration>
FIG. 5 is a sectional view taken along the line BB 'in FIG. The vacuum heat insulator 35 provided between the outer box 32 and the inner box 33 is classified into a rear vacuum heat insulator 35a attached to the back side of the outer box 32 and a side vacuum heat insulator 35b attached to the side face. Is done. At the left and right corners on the back surface of the outer box 32, there are concave portions 55 formed with steps. The concave portion 55 is formed outside the rear vacuum heat insulating material 35 a, and both left and right sides of the rear vacuum heat insulating material 35 a are positioned outside the side surfaces of the inner box 33. Similarly, the concave portion 55 is formed behind the side heat insulating material, and the rear side of the side heat insulating material is located behind the rear surface of the inner box 33.

<1-5. Effect>
The operation and operation of the refrigerator configured as described above will be described below.

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

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

  Generally, warm air has a property of flowing upward, so that air discharged outside the upper machine room 36 easily flows upward. In particular, when the refrigerator 30 is installed in a limited space such as a system kitchen, the refrigerator 30 may be installed close to all of the left and right side surfaces and all the walls on the rear side. It is easy to stay above the chamber 36. At this time, since the windward side of the upper machine room 36 has a negative pressure due to the drive of the blower 38, the warm air retained above the upper machine room 36 is directly introduced from the windward cover 44 into the upper machine room 36. Will be. If the temperature of the introduced air is high, the amount of heat released from the air-cooled condenser 37 and the compressor 39 decreases, the temperature of the components increases, and there arises a problem that reliability cannot be ensured.

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

  In the present invention, a leeward louver 52 having a plurality of guide plates 53 is attached to a top opening 49 a provided in the leeward resin cover 51. Since the guide plate 53 is inclined in the forward direction, it can apply a forward dynamic pressure to the air discharged from the upper machine chamber 36, thereby suppressing the warm air from staying above the upper machine chamber 36. , Can be sent out of the refrigerator 30. Thereby, the warm air discharged from the upper machine room 36 can be prevented from being directly introduced into the upper machine room 36 from the windward cover, and the reliability of the refrigerator 30 can be improved.

  Similarly, a windward louver 47 having a plurality of guide plates 53 is attached to a top opening 49 a provided in the windward resin cover 46. Therefore, the air in front of the windward cover 44 can be preferentially introduced into the upper machine room 36. Thereby, the introduction of air above the upper machine chamber 36 can be suppressed, so that the warm air discharged from the upper machine chamber 36 and staying there, or the upper machine chamber 36 warmed through the steel plate cover 43 is heated. Can be suppressed, and the temperatures of the air-cooled condenser 37 and the compressor 39 can be reduced.

  Further, both the leeward louvers 47 and the leeward louvers 52 have a shape which is inclined downward toward the front as a whole. For this reason, since the opening area when viewed from the front of the refrigerator 30 can be increased, the pressure loss of the air flowing through the upper machine room 36 can be reduced, and the air volume can be increased. By increasing the amount of air flowing through the upper machine room 36, the heat radiation of the air-cooled condenser 37 and the compressor 39 is further promoted, and the temperature of the components can be reduced and the reliability can be further improved.

  As the air volume increases, the forward flow becomes dominant in front of the leeward cover 45 above the heat insulating box 31. As a result, the surrounding air also follows the flow, and the warm air discharged from the rear opening 50a provided in the leeward resin cover 51 is also lifted up to above the upper mechanical chamber 36 by gravity. It is easy to flow to the front of the refrigerator 30 together with air discharged from the refrigerator.

  Furthermore, since the lowermost part of the leeward louver 52 and the upper surface of the heat insulating box 31 are substantially at the same height, the air discharged from the leeward louver 52 easily flows along the upper surface of the heat insulating box 31 due to the Coanda effect. Accordingly, it is possible to suppress the flow from flowing upward and staying and returning from the windward cover 44 into the upper machine chamber 36 as it is.

  Next, the function and effect of the convex wall 54 provided on the windward louver 47 and the leeward louver 52 will be described.

  The blower fixing member 40 partitions the upper machine chamber 36 to the left and right, and the blower 38 is attached to flow the wind in the left and right direction. Therefore, since the air on the leeward side has a flow velocity in the left-right direction, when the air is discharged from the leeward louver 52 and hits the convex wall 54, the lateral flow can be smoothly changed to the forward direction. If there is no convex wall 54, the horizontal flow will be discharged to the side of the refrigerator 30 as it is. The laterally discharged flow hits the side wall of the refrigerator 30 installation space, flows toward the ceiling of the installation space, and stays above the refrigerator 30, and is again introduced from the windward cover 44 into the upper machine room 36. You.

  Further, since a plurality of guide plates 53 are provided on the windward louver 47 and the leeward louver 52 at a position higher than the upper surface of the heat insulating box 31, when there is no convex wall 54, the guide plates are provided from the side of the refrigerator 30. 53 will be seen, which impairs the appearance. By providing the convex wall 54, only the horizontal surface can be seen from the side of the refrigerator 30, so that a neat design can be realized. In particular, 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 a corner connecting the side surface and the upper surface, so that when looking up from the side of the refrigerator 30, The visible area can be minimized, resulting in a cleaner design.

  The upwind louver 47 and the downwind louver 52 are characterized by a substantially symmetrical shape, and may be shared as long as they can be aligned with peripheral components. In that case, the number of components managed in the assembly process can be reduced, so that fixed costs can be reduced and inexpensive products can be provided accordingly.

  Next, the function and effect of the height relationship of the refrigerator top surface arrangement member 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 sinks from the refrigerator rear side to the front side between the steel plate cover 43 and the convex wall. It has a similar configuration. As described above, warm air has a property of flowing upward, and since the upper surface of the guide plate 53 is located at a position lower than the upper surface of the steel plate cover 43, 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, since the upper surface of the steel plate cover 43 is close to the ceiling of the installation space of the refrigerator 30 and the space between the upper surface of the heat-insulating box 31 and the ceiling is wide, the airflow resistance above the steel plate cover 43 increases and tends to rise. The warm exhaust air can be guided to the front of the refrigerator 30 above the heat insulating box 31. In addition, even in the windward direction, the front air can be introduced into the upper machine room 36 with priority over the air above the steel plate cover 43 by the same action, so that the compressor 39 is efficiently radiated by the low temperature outside air in front of the refrigerator 30. Can be done.

  Further, since the guide plate 53 is located between the steel plate cover 43 and the convex wall 54, and the guide plate 53 is configured below the steel plate cover 43 and the convex wall 54, the user places an object on the refrigerator 30. Even in this case, 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, the air volume flowing through the upper machine chamber 36 can be secured, and the reliability can be maintained. Therefore, 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 by utilizing the space above the heat insulating box 31.

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

  The left and right sides of the back vacuum heat insulator 35a are located outside the side surfaces of the inner box 33, and the rear side of the side heat insulator 34b is located behind the back surface of the inner box 33. It can be said that 33 is completely overturned. In general, the vacuum heat insulating material has a higher heat insulating performance than the foam heat insulating material, and therefore has a greater effect of suppressing the heat of the outside air from entering the inside of the refrigerator 30 than when the inner box 33 comes to the outside. At this time, since the concave portion 55 is formed outside the back vacuum heat insulating material 35a and formed rearward of the side heat insulating material 34b, the outer box is not bent or dented without bending the vacuum heat insulating material 35. 32. Accordingly, it is possible to prevent the vacuum heat insulating material 35 from being deteriorated due to the tearing or peeling of the vacuum heat insulating material 35, to simplify the attaching operation, and to reduce the number of assembling steps.

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

  However, in recent years, with the evolution of the distribution industry and the increase in co-working, the tendency of bulk buying is increasing, and the demand for the refrigerator internal volume is increasing year by year, and it is desired to increase the refrigerator internal volume without expanding the installation space of the refrigerator. Market needs are growing. By increasing the size of the inner box 33 without increasing the size of the outer box 32, the need can be met, but the cross-sectional area of the concave portion 55 is further reduced. At this time, in the present embodiment, as described above, the cool air for cooling the upper machine room 36 can be taken in from the front of the refrigerator 30 and discharged to the front using the space above the heat insulating box 31. Accordingly, since no intake or exhaust air is required on the back and side surfaces of the refrigerator 30, the concave portion 55 can be made small even if it is assumed that the refrigerator 30 is installed close to the wall of the room. Therefore, the refrigerator of the present invention can increase the internal volume of the refrigerator without increasing the installation space.

<Summary of Embodiment 1>
As described above, in the present embodiment, the upper machine chamber 36 provided with a step on the upper rear surface of the heat insulating box 31, the compressor 39 and the blower 38 provided in the upper machine chamber 36, The upper machine room 36 includes a machine room cover 42 that covers the upper machine room 36, and a top surface opening 49a provided on the left and right sides of the upper surface of the upper machine room 36. The top surface opening 49a is provided with a plurality of guide plates 53 facing forward. By providing the windward louvers 47 and the leeward louvers 52, it is possible to apply a forward dynamic pressure to the air discharged from the upper machine chamber 36, and similarly, preferentially give the front air to the upper machine chamber 36. Since it can be introduced, the compressor 39 can be efficiently radiated by the low temperature outside air in front of the refrigerator 30 by utilizing the space above the heat insulating box 31. Therefore, the refrigerator 30 can be placed against the back and side walls of the house, and the installation space of the refrigerator 30 can be reduced in the limited space of the house.

  Further, since the upper surface of the guide plate 53 is inclined downward toward the front, the opening area when viewed from the front of the refrigerator 30 can be increased, so that the pressure loss of the air flowing through the upper machine chamber 36 can be reduced. , And the air volume can be increased to more efficiently radiate heat from the compressor 39.

  Further, since the convex wall 54 is provided on the side of the refrigerator of the leeward louvers 47 and the leeward louvers 52, even when the blower 38 is mounted in a direction in which air flows in the left and right directions, when the air is discharged from the leeward louvers 52. By hitting the convex wall 54, the lateral flow can be smoothly changed to the forward direction, so that the discharged air can be more smoothly sent to the front of the refrigerator 30. Furthermore, even when the upper part of the refrigerator 30 is viewed from the side of the refrigerator 30, the guide plate 53 is difficult to see, so that the appearance quality of the refrigerator 30 can be improved.

  Further, since the upper surface of the leeward louver 52 is located at a position lower than the upper surface of the steel plate cover 43, 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 is from the heat insulating box 31 to the ceiling. , The wind resistance above the steel plate cover 43 becomes relatively large, and the warm exhaust gas that is going to rise can be guided to the front of the refrigerator 30, and is discharged from the upper machine room 36. It is possible to suppress the warm air from being directly introduced into the upper machine room 36 from the windward cover, and to improve the reliability of the refrigerator 30.

  Further, in the present embodiment, an upper machine room 36 provided with a step on the upper rear surface of the heat insulating box 31, a compressor 39 and a blower 38 provided in the upper machine room 36, and an upper machine room The upper part of the machine room cover 42 is provided with upper and lower openings 49a provided on the left and right of the upper surface of the upper machine room 36. Since the portion 49a is disposed at a position lower than the upper surface of the machine room cover 42, 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 of the heat insulating box 31 and the ceiling is wide. Therefore, the air path resistance above the machine room cover 42 becomes large, and the exhaust air of the warm upper machine room 36 that is going to rise can be guided to the front of the refrigerator 30 above the heat insulating box 31. Machine room cover forward air Since the air can be introduced into the upper machine chamber 36 in preference to the air above the upper 42, the outside air having a low temperature in front can be taken into the upper machine chamber 36 by utilizing the space above the heat insulating box 31 so that the compressor can be efficiently produced. 39 can dissipate heat. Therefore, the refrigerator 30 can be placed against the back and side walls of the house, and the installation space of the refrigerator 30 can be reduced in the limited space of the house.

  Furthermore, even when the user places an object on the refrigerator 30, the object is supported by the machine room cover 42, so that the top surface opening 49a is not easily blocked, so that the air volume flowing through the upper machine room 36 is secured. And maintain reliability. Therefore, 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 by utilizing the space above the heat insulating box 31.

  Further, the top opening 49a has a windward louver 47 and a leeward louver 52 provided with a plurality of forward guide plates 53, so that a forward dynamic pressure is applied to the air discharged from the upper machine chamber 36. Similarly, since the front air can be preferentially introduced into the upper machine room 36, the compressor 39 can be efficiently radiated by the low-temperature outside air in front of the refrigerator 30.

(Embodiment 2)
FIG. 6 is a longitudinal sectional view of the upper part of the refrigerator according to the second embodiment of the present invention, and FIG. 7 is a perspective view of the upper part of the refrigerator according to the second embodiment.

  The description of the same configuration and the same technical idea as that of the first embodiment is omitted, but the present embodiment can be combined with the configuration of the first embodiment as long as there is no problem. It is possible.

<2-1. Control board storage section configuration>
6 and 7, the refrigerator 60 has a control board storage section 61 on the upper surface of the heat insulating box 31 and in front of the machine room cover 42. The control board housing section 61 is mainly covered with an outer shell member 62 made of a steel plate and a board cover 63, and has a built-in board 65 fixed to a board fixing member 64 molded of a resin such as PP. .

  The outer shell member 62 and the substrate fixing member 64 are fitted and fixed by claws, and are attached by inserting projections of the substrate fixing member 64 into cutouts formed in the outer box 32 to form the upper machine chamber 36. Screws are fixed to the parts. The outer shell member 62 and the substrate cover 63 are means for preventing the spread of fire on the heat insulating box 31 and the house in the event that the substrate 65 is ignited. The same effect can be obtained by using a fuel resin.

  When the outer shell member 62 is formed of a flame-retardant resin, the outer shell member 62 can be formed integrally with the substrate fixing member 64, and the number of components can be reduced. Further, 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. Conversely, the outer shell member 62 can be formed as a part of the outer box 32 by penetrating the outer box 32 where the outer shell member 62 is located. In that case, it is also possible to fix the control board storage portion 61 so as to be partially embedded in the heat insulation box 31. Even when the height of the board 65 is high, the control board storage section 61 can be placed above the heat insulation box 31 without increasing the product dimensions. The control board storage section 61 can be attached.

  With the control board storage section 61 attached to the heat insulating box 31, the upper surface of the board cover 63 is higher than the upper surface of the heat insulating box 31, and the upper surface of the steel plate cover 43, the upper surface of the carrying grip 48, and the guide plate 53. The uppermost portion and the upper surface of the convex wall 54 have substantially the same height. As in the first embodiment, since the lowermost part of the guide plate 53 and the upper surface of the heat insulating box 31 are substantially at the same height, the upper surface of the guide plate 53 is It is formed between the upper surfaces.

  A top surface vacuum heat insulating material 66 is attached to a lower surface of the outer box 32 below the control board storage part 61. When the control board storage section 61 is fixed so as to be partially embedded in the heat insulating box 31, the outer vacuum box 66, the outer shell member 62, the board fixing member 64 and the like are directly used so as not to damage the top surface vacuum heat insulating material 66. It is necessary to smooth the surface of the parts to be touched, and to insert spacers to prevent direct contact.

  The rearmost part of the control board storage part 61 is adjacent to the machine room cover 42, and the foremost part is provided more deeply than the front surface of the heat insulating box 31. Further, the width is substantially the same as the width of the steel plate cover 43, and is formed at least inside a portion where the guide plate 53 is present.

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

  As in the first embodiment, the upper surface of the steel plate cover 43 is substantially horizontal and the highest surface of the machine room cover 42, and the guide plate 53 is located between the steel plate cover 43 and the convex wall on the rear side of the refrigerator. , The upper surface of the steel plate cover 43 is close to the ceiling of the installation space of the refrigerator 30 and the space between the upper surface of the heat insulating box 31 and the ceiling is large. Therefore, the airflow resistance above the steel plate cover 43 increases, and the warm exhaust gas that is going to rise can be guided to the front of the refrigerator 30 above the heat insulating box 31. Similarly, the air in front of the steel plate cover 43 Since the air can be introduced into the upper machine room 36 with priority over the air above, the compressor 39 can efficiently radiate heat from the low-temperature outside air in front of the refrigerator 30.

  Furthermore, in the present embodiment, the control board storage portion 61 that protrudes upward from the upper surface of the heat insulating box 31 is provided in front of the machine room cover 42, so that the upper surface of the heat insulating box 31 in front of the guide plate 53 is provided. The induced exhaust gas can be prevented from passing through the front of the machine room cover 42 and being directly introduced from the windward louver 47 into the upper machine room 36. Therefore, the exhaust gas can be sent further forward and the air forward can be introduced into the upper machine chamber 36, so that the heat radiation efficiency of the compressor 39 can be further increased.

  Further, since the upper surface of the board cover 63 is substantially the same height as the upper surface of the steel plate cover 43, the control board housing portion 61 that has protruded above the heat insulating box 31 without increasing the height of the refrigerator 30. Since the maximum volume can be secured, it can be said that the shape has the highest volumetric efficiency by maximally utilizing the space above the heat insulating box 31. At the same time, since the gap size between the upper part of the board cover 63 and the ceiling above the steel plate cover 43 becomes equal, the air path resistance becomes substantially equal, so that the distance from the ceiling can be minimized. And the air flowing above the steel plate cover 43 can be minimized, so that the temperature rise in the machine room can be minimized.

  At this time, since a part or all of the control board housing part 61 is formed outside the heat insulating box 31, it is not necessary to house the control board housing part 61 in the heat insulating box 31, thereby increasing the heat insulating efficiency of the refrigerator 60. Therefore, the internal volume efficiency of the refrigerator 60 can be increased. Further, by eliminating the step in the outer box 32 below the control board storage section 61, it is possible to attach the top surface vacuum heat insulating material 66 to the top surface of the outer box 32 as shown in FIG. When the refrigerator 30 is operated, electricity flows to the substrate 65 to generate heat, and the heat load in the refrigerator 30 increases. Therefore, generally, a vacuum heat insulating material having a higher heat insulating performance than the foamed heat insulating material is used. Being able to be installed between the 30 compartments leads to a significant improvement in the heat insulation efficiency. In addition, when the control board housing section 61 is put out of the heat insulating box 31, the wall thickness under the control board housing section 61 is increased, and even if the top surface vacuum heat insulating material 66 is arranged, the top surface vacuum heat insulating material is not affected. A space in which the foam heat insulating material 34 flows can be secured between the inner case 66 and the inner case 33. As a result, the heat insulation performance can be further improved, and the inner box 33 can be supported, and the deformation and color change of the inner box 33 can be suppressed, and the strength can be increased. It is possible to easily attach components such as an air path and a shelf, and to suppress deformation of the heat insulating box 31.

  In addition, since air taken into the machine room by the action of the blower 38 and exhaust air from the machine room flow in front of the upper machine room 36, heat transfer on the surface of the control board housing portion 61 is promoted, and heat dissipation efficiency is improved. The reliability of the substrate 65 can be improved.

In addition, the rearmost portion of the control board storage section 61 is installed adjacent to the machine room cover 42, so that the position of the foremost part can be provided at the maximum inside the refrigerator 30. Also in the present embodiment, the frontmost part of the control board storage part 61 is provided behind the front face of the heat insulating box 31, and the control board storage part when the user of the refrigerator 30 stands at the front of the refrigerator 30 and opens the door is opened. The visibility of the portion 61 can be reduced, and the appearance and quality of the refrigerator can be improved.

  Similarly, the width is substantially the same as the width of the steel plate cover 43, and by forming the width at least inside a portion of the guide plate 53, the visibility of the refrigerator 30 from the side can be reduced. Further, since the space for cooling air in the upper machine chamber 36 flows in front of the guide plate 53, if the control board storage unit 61 is installed here, the air path is obstructed, and the amount of air flowing in the upper machine chamber 36 decreases. This leads to a reduction in heat radiation performance. By arranging the control board storage portion 61 inside the portion where the guide plate 53 is located, it is possible to suppress the decrease in the air volume and contribute to securing the heat radiation performance.

  As described above, the configuration of the refrigerator according to the present invention preferentially takes air into the machine room from a low-temperature space in front of the refrigerator and sends warm exhaust air to the front of the refrigerator, thereby reducing the temperature rise in the machine room. Since the reliability can be suppressed and the reliability can be improved, the present invention can be applied to industrial equipment in which a heating element is cooled by forced air cooling, such as a home or commercial refrigerator.

30, 60 Refrigerator 31 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 37 Air-cooled condenser 38 Blower 39 Compressor 40 Blower fixing member 41 Bypass air path 42 Machine room cover 43 Steel plate cover 44 Upwind cover 45 Downwind cover 46 Upwind resin cover 47 Upwind louver 48 Carrying handle 49 Top panel 49a Top opening 50 Back section 51 Downwind resin cover 52 Downwind louver 53 Guide plate 54 Convex wall 55 Recess 61 Control board storage part (convex part)
62 outer shell member 63 substrate cover 64 substrate fixing member 65 substrate 66 top surface vacuum insulation material

Claims (3)

A machine room provided with a step in the upper rear part of the heat insulating box, a compressor and a blower provided in the machine room, a machine room cover covering an upper surface of the machine room, and an upper surface of the machine room and an opening provided on the left and right, the louvers provided we are having a plurality of guide plates towards the front in the opening, an upper surface of the louvers, a refrigerator that is inclined downward toward the front . The refrigerator according to claim 1, wherein a convex wall is provided on a part of an outer peripheral portion of the opening. An upper surface of the machine room cover is higher than the upper surface of the insulating box body, the opening refrigerator according to claim 1 or 2 is disposed at a position lower than the upper surface of the machine room cover.

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