JP2017203602A - refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator which efficiently radiates heat by suppressing temperature rise in the air to be sucked with a simple structure, even when the refrigerator is installed with its back surface and side surfaces being in contact with walls.SOLUTION: In a refrigerator, an upper surface of a machine chamber cover 42 for covering an upper machine chamber 36 provided at an upper part on the back surface of a heat insulation box body 31 is higher than an upper surface of the heat insulation box body 31, and top surface opening parts 49a provided on left and right of the upper surface of the upper machine chamber 36 are arranged at a position lower than the upper surface of the machine chamber cover 42. Thus, exhaust air of the upper machine chamber 36 can be guided to the front of the refrigerator 30 which is above the heat insulation box body 31, and likewise, the air in front can be introduced to the upper machine chamber 36 preferentially to the air above the machine chamber cover 42. Thus, even when the refrigerator is installed with its back surface and side surfaces being in touch with the housing walls, it can allow a compressor 39 to radiate heat efficiently by utilizing the space above the heat insulation box body 31, so that an installation space can be reduced.SELECTED DRAWING: Figure 6

Description

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

  Conventionally, this type of refrigerator is provided with a vent on a side surface of a machine room to radiate heat from a cooling unit in the machine room (see, for example, 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, machine room side wall parts 11 a located on both side surfaces of the machine room 11, and a cover 12 covering the machine room 11 The machine room 11 is provided with a compressor 13 and a fan motor 14, and the machine room side wall 11 a has a first side wall 15 having a plurality of holes and a second side facing the first side wall 15. The side wall 16 is provided so that the outside air can be taken in and exhausted by the holes provided in the side surface of the refrigerator even if the side wall 16 is installed in close contact with the wall on the back side where the refrigerator body 10 is installed. Enables efficient heat dissipation of the internal cooling unit.

JP 2007-17044 A

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

  The present invention solves the above-described conventional problems, and provides a refrigerator that can efficiently dissipate heat by suppressing an increase in the temperature of the sucked air with a simple configuration even when the side and back of the refrigerator are attached to a wall. For the purpose.

  In order to solve the conventional problem, a refrigerator according to the present invention includes a machine room provided with a step on the back upper part of a heat insulating box, a compressor and a blower provided in the machine room, A machine room cover that covers the upper surface of the machine room, and openings provided on the left and right sides of the upper surface of the machine room, the upper surface of the machine room cover being higher than the upper surface of the heat insulating box, and the opening is the machine room It is arrange | positioned in the position lower than the upper surface of a cover, It is characterized by the above-mentioned. As a result, 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 exhaust of the machine room can be guided to the front of the refrigerator above the heat insulation box, and similarly, the front air can be introduced into the machine room in preference to the air above the machine room cover. By utilizing the upper space, outside air having a low front temperature can be taken into the machine room, and the compressor can be efficiently dissipated.

Since the refrigerator of the present invention can take outside air into the machine room using the upper space of the refrigerator and send the discharged air from the machine room to the front of the refrigerator, the refrigerator is installed against the back and side walls of the house. It is possible to reduce the installation space of the refrigerator in the limited space of the house.

The longitudinal cross-sectional view of the refrigerator upper part in Embodiment 1 of this invention The exploded perspective view of the upper machine room in the embodiment The exploded perspective view of the machine room cover in the embodiment A-A 'sectional view in FIG. B-B 'sectional view in FIG. Vertical sectional view of the upper part of the refrigerator in Embodiment 2 of the present invention Perspective view of the upper part of the refrigerator in the same embodiment Rear perspective view of a conventional refrigerator

  The first invention includes a machine room provided with a step on the back upper part of the heat insulation box, a compressor and a blower provided in the machine room, and a machine room cover that covers the upper surface of the machine room. An opening provided on the left and right of the upper surface of the machine room, the upper surface of the machine room cover being higher than the upper surface of the heat insulation box, and the opening being disposed at a position lower than the upper surface of the machine room cover. Because 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 tries to rise. Since the exhaust of the warm machine room can be guided to the front of the refrigerator above the heat insulation box, similarly, the front air can be introduced into the machine room in preference to the air above the machine room cover, Using the space above the heat insulation box, The low outside air can be radiated efficiency can be incorporated in the machine room may compressor. Therefore, the refrigerator can be installed against the back and side walls of the house, and the installation space for the refrigerator can be reduced in the limited space of the house.

  Furthermore, even when the user places an object on the refrigerator, the object is supported by the machine room cover, and the opening is not easily blocked, so the air volume flowing through the machine room is secured and reliability is maintained. Can do. Therefore, even if the height of the refrigerator is substantially equal to the height of the ceiling, the reliability of the refrigerator can be maintained using the space above the heat insulating box.

  According to a second invention, in the first invention, by having a convex portion in front of the machine room, 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. Therefore, air having a lower temperature farther from the machine room can be introduced into the machine room, so that the heat dissipation efficiency of the compressor is increased.

  According to a third invention, in the second invention, since the convex part is a control board storage part, the space above the heat insulation box can be effectively used, and it is not necessary to house the control board storage part in the heat insulation box. Since the heat insulation efficiency of the refrigerator can be increased, the volumetric efficiency of the refrigerator can be increased. Further, 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 radiation efficiency from the periphery of the control board housing part can be increased, and the reliability of the control board can be improved.

  According to a fourth invention, in the second or third invention, the convex portion is disposed adjacent to the machine room, thereby minimizing a region formed at a position higher than the upper surface of the heat insulating box. Therefore, the visibility from the front when using the refrigerator can be reduced, and the appearance quality of the refrigerator can be improved.

5th invention raises the height of the whole refrigerator by the height of the upper surface of the said convex part and the upper surface of the said machine room cover in any one invention of 2nd-4 being substantially the same. Therefore, parts can be arranged in the space above the heat insulating box as much as possible, and the volumetric efficiency of the refrigerator can be maximized in the same refrigerator dimensions. Also, since the air path resistance above the machine room cover and the convex part can be made substantially equal, the air passing through the machine room cover and the convex part can be minimized, and the rise in the machine room temperature is also minimized. Can be suppressed.

  According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the opening is provided with a louver having a plurality of guide plates facing forward, so that the air discharged from the machine room is directed forward. Similarly, since the front air can be preferentially introduced into the machine room, the compressor can be efficiently dissipated by the outside air having a low temperature in front of the refrigerator.

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

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of an upper part of a refrigerator in Embodiment 1 of the present invention, and FIG. 2 is an exploded perspective view of an upper machine room in the same embodiment.

  In FIG. 1, a heat insulating box 31 of a refrigerator 30 is mainly composed of an outer box 32 using a steel plate and an inner box 33 formed of a resin such as ABS. The foam insulation material 34 is filled to insulate the inside and the surroundings. Furthermore, the heat insulation performance of the heat insulation box 31 can be improved by sticking the vacuum heat insulation material 35 having higher heat insulation performance than the foam heat insulation material 34 to the inside of the outer box 32 in a form embedded in the foam heat insulation material 34. The rear upper part of the heat insulation box 31 has an upper machine room 36 in a space formed by denting the rear end of the top surface and the upper end of the back to the inside of the refrigerator 30.

  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. By driving the blower 38, the air-cooled condenser 37 and the compressor 39 are air-cooled. The

  The blower 38 is attached to the blower fixing member 40, and the blower fixing member 40 divides the air path in the upper machine chamber 36 into the windward side and the leeward side of the blower 38. Further, a bypass air passage 41 through which the outside air that is directly sucked into the blower 38 without passing through the air-cooled condenser 37 passes is formed in the upper part of 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, 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. If the height of the bypass air passage 41 is less than 5 mm (10%), the air flow rate is significantly reduced when the air-cooled condenser 37 is completely closed. If the height of the bypass air passage 41 is higher than 15 mm (15%), the air-cooled condenser The amount of air passing through 37 is reduced, and sufficient heat dissipation capability cannot be obtained.

  Thus, by having a structure that assumes a case where the air-cooled condenser 37 is blocked by 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 in the same embodiment.

2 and 3, a machine room cover 42 covering the upper machine room 36 includes a steel plate cover 43 made of a steel plate covering the center, a windward cover 44 installed on the windward side with respect to the blower 38, and a windward side. The leeward cover 45 is installed.

  The windward cover 44 includes two parts, a windward resin cover 46 and a windward louver 47. The windward resin cover 46 has a shape including a carrying grip 48, a top surface portion 49, and a back surface portion 50, and the windward louver 47 is attached at 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 and fixed to the windward resin cover 46 with claws. 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.

  The top surface portion 49 of the windward resin cover 46 is provided with a top surface opening portion 49 a and the back surface portion 50 is provided with a back surface opening portion 50 a, and external air can be taken into the upper machine chamber 36. The back surface opening 50a has a plurality of slit shapes with a width of about 5 mm, and the top surface opening 49a leaves a minimum area for securing the torsional and tensile strength of the top surface portion 49 and increases one by one. Has a shape. For example, as shown in FIG. 3, a quadrangular hole is provided so that the opposite sides of the outer periphery of the top surface portion 49 are connected by a belt-like portion having a width of about 15 mm, or a triangular shape is used so that the diagonals are connected. Four holes may be provided. By setting the size of one side of the opening to 5 mm or more, clogging of the opening due to dust can be suppressed, so that performance can be ensured without frequently cleaning the opening. Accordingly, dust adheres to the machine room, but this is not a problem because reliability can be secured by securing an appropriate amount of dimension between the parts 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 to form a space for a palm to grip the carrying grip portion 48.

  The leeward cover 45 has a substantially symmetric configuration with the leeward cover 44, and includes a leeward resin cover 51 having a shape including a transport grip 48, a top surface portion 49, and a back surface portion 50, and the leeward resin cover 51. It consists of a leeward louver 52 that covers the top surface portion 49.

<1-2. Louver shape>
4 is a cross-sectional view taken along line AA ′ in FIG. The leeward louver 47 has a configuration that is substantially symmetrical to the leeward louver 52.

  In FIG. 4, the leeward louver 47 and the leeward louver 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 aligned with a constant interval d. The distance d between the guide plates 53 is preferably about 5 mm. In order to minimize the pressure loss of the air passage, it is desirable that the interval is large, but if it is 5 mm or more, the child's finger enters, so there is a risk of touching the high-temperature 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 desirable for suppressing clogging due to dust adhesion. Therefore, by setting the thickness to 5 mm, it is possible to ensure performance while ensuring safety.

  Further, when the guide plate 53 is inclined forward, the planar projection distance d ′ between the guide plates 53 is set to 0 to 1 mm or less. When 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 the sparks flying from the outside of the refrigerator during a house fire. Since the heat insulation box 31 composed of the foam heat insulating material 34 and the like is flammable, there is a risk of increasing the damage of a house fire. If it is smaller than 0 mm (that is, there are overlapping portions in the vertical direction), the molding cost cannot be made simple and the molding cost becomes high.

Note that the forward inclination θ of the guide plate 53 is desirably 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 to make the direction toward the front of the refrigerator 30 more smoothly. This is because it can be converted.

  Adjacent guide plates 53 have a shape that is inclined downward toward the front as a whole of the louver by being arranged so that the back side of the refrigerator is higher than the front side.

  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 length extending from the foremost part to the rearmost part of the guide plate 53, and the upper surface is configured to be substantially horizontal at the same height as the uppermost part 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 the corner connecting the side surface and the upper 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 as to ensure a large width of the guide plate 53.

<1-3. Height relationship of each part>
As shown by a broken line in FIG. 2, the machine room cover 42 is composed of a steel plate cover 43, an upwind resin cover 46, an upwind louver 47, an upwind resin cover 51, and an upwind machine louver 52. 36 is screwed to the heat insulating box 31 so as to cover 36.

  In the state attached to the heat insulation box 31, the upper surface of the steel plate cover 43 is the highest surface of the machine room cover 42, and is higher than the upper surface of the heat insulation box 31, and the upper surface of the steel plate cover 43 and the upper surface of the transport grip 48 The uppermost portion of the guide plate 53 and the upper surface of the convex wall 54 have substantially the same height, and the lowermost portion of the guide plate 53, the top surface 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 refrigerator back side to the front side between the steel plate cover 43 and the convex wall. Further, the width dimension of the guide plate 53 is substantially the same as the width dimension of the transport grip 48.

  The top surface opening 49a may be lowered from the upper surface of the heat insulating box 31 as long as an appropriate dimension that does not hit the component arrangement in the upper machine room 36 can be secured, and the pressure loss between the top surface opening 49a and the guide plate 53 increases. As long as a minute space is not created, the guide plate 53 may be raised.

<1-4. Thermal insulation box configuration>
5 is a cross-sectional view taken along the line BB ′ in FIG. The vacuum heat insulating material 35 provided between the outer box 32 and the inner box 33 is classified into a back surface vacuum heat insulating material 35a attached to the back side of the outer box 32 and a side surface vacuum heat insulating material 35b attached to the side surface side. Is done. The left and right corners of the back surface of the outer box 32 have a recess 55 formed with a step. The recess 55 is formed outside the back vacuum heat insulating material 35 a, and the left and right sides of the back vacuum heat insulating material 35 a are positioned outside the side surface of the inner box 33. Similarly, the recess 55 is formed on the rear side of the side surface heat insulating material, and the rear side of the side surface heat insulating material is positioned on the rear side of the back surface of the inner box 33.

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

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

When the compressor 39 starts driving to cool the refrigerator 30, the refrigerant in the refrigeration cycle is compressed and passes through a discharge refrigerant pipe (not shown) connected to the discharge port of the compressor 39 to the air-cooled condenser 37. Since it is introduced, the compressor 39 and the air-cooled condenser 37 generate heat. By driving the blower 38, the windward side of the upper machine chamber 36 becomes negative pressure, and passes through the top opening 49a or the back 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 taken-in air, and on the contrary, the warmed air passes through the rear opening 50a or the top opening 49a provided in the leeward resin cover 51 and the leeward louver 52, and then returns to the upper part. It is discharged out of the machine room 36. Thus, an excessive temperature rise of the air-cooled condenser 37 and the compressor 39 is suppressed, and the reliability of the refrigerator 30 is ensured.

  In general, 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 refrigerator 30 may be installed close to all the walls on the left and right sides and the back, and the warm air exhausted from the upper machine room 36 is It tends to stay above the 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 into the upper machine chamber 36 from the windward cover 44. It 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 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 surface 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, so that warm air is prevented from staying above the upper machine chamber 36. , Can be sent 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 an upwind cover as it is, and can improve the reliability of the refrigerator 30. FIG.

  Similarly, an upwind louver 47 having a plurality of guide plates 53 is attached to a top surface opening 49 a provided in the upwind resin cover 46. Therefore, the air in front of the windward cover 44 can be preferentially introduced into the upper machine chamber 36. Thereby, since it is possible to suppress the introduction of the air above the upper machine chamber 36, the warm air exhausted from the upper machine chamber 36 and staying in the upper machine chamber 36 or the upper machine chamber 36 heated through the steel plate cover 43 can be suppressed. The warm air can be suppressed from being introduced, and the temperatures of the air-cooled condenser 37 and the compressor 39 can be reduced.

  Further, both the windward louver 47 and the leeward louver 52 have a shape that 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 chamber 36 can be reduced and the air volume can be increased. By increasing the amount of air flowing in the upper machine chamber 36, heat radiation of the air-cooled condenser 37 and the compressor 39 is further promoted, and the temperature of the components can be lowered and the reliability can be further improved.

  By increasing the air volume, the forward flow becomes dominant 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, and then the leeward louver 52. It becomes easy to flow to the front of the refrigerator 30 together with the air discharged from.

  Furthermore, since the lowermost part of the leeward louver 52 and the upper surface of the heat insulation box 31 are substantially the same height, the air discharged from the leeward louver 52 easily flows along the upper surface of the heat insulation box 31 due to the Coanda effect. As a result, it can be prevented that the gas flows upward and stays and returns from the windward cover 44 to the upper machine chamber 36 as it is.

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

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

  In addition, 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 visible and the appearance will be impaired. By providing the convex wall 54, only a horizontal plane can be seen from the side of the refrigerator 30, so a clean design can be realized. In particular, the left and right 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, so when looking up from the side of the refrigerator 30, The visible area can be minimized, resulting in a cleaner design.

  Since the windward louver 47 and the leeward louver 52 are characterized by substantially symmetrical shapes, they may be shared as long as they can be aligned with peripheral parts. In that case, since the number of parts managed in the assembly process can be reduced, the fixed cost can be reduced, and an inexpensive product can be provided.

  Next, the effect by the height relationship of a refrigerator top surface arrangement | positioning member is demonstrated.

  The upper surface of the steel plate cover 43 is substantially horizontal and is the highest surface in the machine room cover 42, and the guide plate 53 sinks from the refrigerator back side to the front side between the steel plate cover 43 and the convex wall. It is a composition that goes. As described above, warm air has a property of flowing upward, and the upper surface of the guide plate 53 is located 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, 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 air path resistance above the steel plate cover 43 increases and tends to rise. Warm exhaust can be guided to the front of the refrigerator 30 above the heat insulating box 31. Further, because of the same action on the windward side, the front air can be introduced into the upper machine chamber 36 with priority over the air above the steel plate cover 43, so that the compressor 39 can efficiently dissipate heat by the low-temperature outside air in front of the refrigerator 30. Can be made.

  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, so that the amount of air 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 using the space above the heat insulating box 31.

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

Since the left and right sides of the back vacuum heat insulating material 35a are located outside the side surface of the inner box 33 and the rear side of the side heat insulating material 34b is located behind the back surface of the inner box 33, the vacuum heat insulating material 35 It can be said that 33 is completely covered. In general, the heat insulating performance of the vacuum heat insulating material is higher than that of the foam heat insulating material, and therefore, the effect of suppressing the heat of the outside air from entering the inside of the refrigerator 30 is greater than when the inner box 33 comes to the outside. At this time, since the recessed part 55 is formed outside the back surface heat insulating material 35a and is formed behind the side surface heat insulating material 34b, the outer box is not bent or recessed. 32 can be pasted. As a result, it is possible to prevent the quality from being deteriorated due to the vacuum heat insulating material 35 being torn or peeled off, the pasting operation can be simplified, and the number of assembly steps can be reduced.

  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 delivered to the upper part of the refrigerator 30 through the recess 55 is sent into the upper machine chamber 36 through the back opening 50 a and can be used for heat dissipation of the compressor 39 and the air-cooled condenser 37.

  However, in recent years, with the advancement of the distribution industry and the increase in dual working, the tendency to bulk purchase has progressed, and the demand for the refrigerator's internal volume has been increasing year by year, and it is said that it is desired to expand the refrigerator's internal volume without increasing the refrigerator installation space Market needs are increasing. Enlarging the inner box 33 without increasing the outer box 32 can meet the needs, but the sectional area of the recess 55 is further reduced. At this time, in the present embodiment, the cold air that cools the upper machine room 36 can be taken in from the front surface of the refrigerator 30 and discharged to the front surface using the space above the heat insulating box 31 as described above. Therefore, since intake and exhaust on the back surface and side surface of the refrigerator 30 are not required, the concave portion 55 can be made small even if it is assumed that the side surface and back surface of the refrigerator 30 are installed close to the wall of the room. Therefore, the refrigerator of the present invention can increase the refrigerator internal volume 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 back upper surface of the heat insulation box 31, the compressor 39 and the blower 38 provided in the upper machine chamber 36, A machine room cover 42 covering the upper machine room 36 and a top surface opening 49a provided on the left and right sides of the upper machine room 36 are provided, and a plurality of guide plates 53 directed forward are provided in the top surface opening 49a. By having the leeward louver 47 and the leeward louver 52, forward air pressure can be applied to the air discharged from the upper machine room 36, and similarly, the front air is preferentially given to the upper machine room 36. Since it can introduce | transduce, the compressor 39 can be thermally radiated efficiently with the external temperature with the low temperature ahead of the refrigerator 30 using the space above the heat insulation box 31. FIG. Therefore, the refrigerator 30 can be installed against the back and side walls of the house, and the installation space for 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 increased. , The air volume can be increased, and the compressor 39 can dissipate heat more efficiently.

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

Further, since the upper surface of the leeward louver 52 is positioned 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 extends from the heat insulating box 31 to the ceiling. Therefore, the air path resistance above the steel plate cover 43 is relatively large, and warm exhaust gas that is about to rise can be guided to the front of the refrigerator 30 and is discharged from the upper machine chamber 36. The warm air can be prevented from being introduced into the upper machine room 36 from the windward cover as it is, and the reliability of the refrigerator 30 can be improved.

  Further, in the present embodiment, the upper machine room 36 provided with a step on the back upper part of the heat insulation box 31, the compressor 39 and the blower 38 provided in the upper machine room 36, and the upper machine room. A machine room cover 42 covering the upper surface of the upper machine room 36, and a top surface opening 49a provided on the left and right surfaces of the upper machine room 36. The upper surface of the machine room cover 42 is higher than the upper surface of the heat insulating box 31, and Since the portion 49a is arranged 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 is increased, and the exhaust of the warm upper machine room 36 that is about to rise can be guided to the front of the refrigerator 30 above the heat insulation box 31. Front of machine room cover 42, since it can be introduced into the upper machine chamber 36 in preference to the air above the upper air, the space above the heat insulating box 31 can be used to take in the outside air at a low temperature in the front to the upper machine chamber 36. 39 can be dissipated. Therefore, the refrigerator 30 can be installed against the back and side walls of the house, and the installation space for 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 49 a is not easily blocked, so the amount of air 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 using the space above the heat insulating box 31.

  Further, the top surface opening 49a has a windward louver 47 and a leeward louver 52 provided with a plurality of guide plates 53 directed forward, thereby imparting a forward dynamic pressure 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 dissipated 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 in the second embodiment of the present invention, and FIG. 7 is a perspective view of the upper part of the refrigerator in the same embodiment.

  In addition, although description is abbreviate | omitted about the part which can apply the structure similar to Embodiment 1, and the same technical idea, as long as there is no malfunction, it can apply combining this Embodiment with the structure of Embodiment 1. Is possible.

<2-1. Control board storage unit configuration>
6 and 7, the refrigerator 60 has a control board storage 61 on the upper surface of the heat insulating box 31 and in front of the machine room cover 42. The control board storage 61 is covered with an outer shell member 62 and a board cover 63 mainly using a steel plate, and has a built-in board 65 fixed to a board fixing member 64 molded with 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 the protrusions of the substrate fixing member 64 into the notches formed in the outer box 32 to constitute 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 fire from spreading to the heat insulation box 31 and the house when the substrate 65 is ignited. The same effect can be obtained by using a fuel resin.

In the case where the outer shell member 62 is molded from a flame retardant resin, the outer shell member 62 can be integrated with the substrate fixing member 64, and the number of parts 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, it is also possible to cut out the outer box 32 where the outer shell member 62 is located and form the outer shell member 62 as a part of the outer box 32. In that case, it is also possible to fix the control board storage part 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 part 61 is located above the heat insulation box 31 without increasing the product size. The control board storage part 61 can be attached.

  In a state where the control board storage 61 is attached to the heat insulation box 31, the upper surface of the board cover 63 is higher than the upper surface of the heat insulation box 31, the upper surface of the steel plate cover 43, the upper surface of the transport grip 48, and the guide plate 53. It is substantially the same height as the top and the top surface of the convex wall 54. Similarly to the first embodiment, since the lowermost part of the guide plate 53 and the upper surface of the heat insulating box 31 are substantially the same height, the upper surface of the guide plate 53 extends from the upper surface of the heat insulating box 31 to the machine room cover 42. It is formed between the upper surfaces.

  A top vacuum heat insulating material 66 is affixed to the lower surface of the outer box 32 below the control board storage unit 61. When the control board storage 61 is fixed so as to be partially embedded in the heat insulation box 31, the top vacuum insulation material 66 is not directly damaged by the outer box 32, the outer shell member 62, the board fixing member 64, or the like. It is necessary to smooth the surface of the parts to be touched or to insert a spacer to prevent direct contact.

  The rearmost part of the control board housing part 61 is adjacent to the machine room cover 42, and the foremost part is provided behind 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 the portion where the guide plate 53 is present.

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

  Similarly to the first embodiment, the upper surface of the steel plate cover 43 is substantially horizontal and is 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 refrigerator rear side. Since the top 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 top surface of the heat insulating box 31 and the ceiling is large. The air path resistance above the steel plate cover 43 is increased, so that warm exhaust gas that is about to rise can be guided to the front of the refrigerator 30 above the heat insulating box 31. Since the air can be introduced into the upper machine chamber 36 in preference to the air above, the compressor 39 can be efficiently dissipated by the low-temperature outside air in front of the refrigerator 30.

  Furthermore, in the present embodiment, the control board storage unit 61 that protrudes upward from the upper surface of the heat insulation box 31 is provided in front of the machine room cover 42, so that the upper surface of the heat insulation box 31 in front of the guide plate 53. It is possible to prevent the induced exhaust gas from passing through the front of the machine room cover 42 and directly from the windward louver 47 to the upper machine room 36. Therefore, the exhaust gas can be delivered to the front and the front air can be introduced into the upper machine chamber 36, so that the heat dissipation efficiency of the compressor 39 can be further increased.

  Further, the upper surface of the substrate cover 63 is substantially the same height as the upper surface of the steel plate cover 43, so that the height of the refrigerator 30 is not increased, and the control substrate storage portion 61 that protrudes above the heat insulating box 31 can be obtained. Since the volume can be secured to the maximum, it can be said that it is the most volume-efficient shape utilizing the space above the heat insulating box 31 to the maximum. At the same time, since the gap dimension to the ceiling above the substrate cover 63 and the ceiling above the steel plate cover 43 is equal, the air path resistance is substantially equal. Therefore, the distance from the ceiling can be minimized, and the substrate cover 63 can be minimized. Since the air flowing above the steel plate cover 43 can be minimized, the temperature rise in the machine room can be minimized.

  At this time, since part or all of the control board storage unit 61 is configured outside the heat insulation box 31, there is no need to store the control board storage unit 61 in the heat insulation box 31, and the heat insulation efficiency of the refrigerator 60 is improved. Therefore, the volumetric efficiency of the refrigerator 60 can be increased. Further, by removing the step in the outer box 32 below the control board storage unit 61, it is possible to attach the top vacuum heat insulating material 66 to the top surface of the outer box 32 as shown in FIG. During operation of the refrigerator 30, electricity flows through the substrate 65 and generates heat, increasing the heat load in the refrigerator 30. Therefore, a vacuum heat insulating material having higher heat insulating performance than the foam heat insulating material is generally used as the substrate 65 and the refrigerator. Being able to be installed between the 30 chambers leads to a significant improvement in heat insulation efficiency. Moreover, even if the top surface vacuum heat insulating material 66 is arranged, the top surface vacuum heat insulating material is increased by bringing the control board storage portion 61 out of the heat insulation box 31 so that the wall thickness under the control board storage portion 61 is increased. A space through which the foamed heat insulating material 34 flows can be ensured between 66 and the inner box 33. As a result, the heat insulation performance can be further enhanced, the inner box 33 can be supported, the deformation of the inner box 33 and the color change can be suppressed, and the strength can be increased. Attachment of components such as an air passage and a shelf can be facilitated, and deformation of the heat insulating box 31 can be suppressed.

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

  Further, the rearmost part of the control board storage unit 61 is installed adjacent to the machine room cover 42, so that the position of the foremost part can be provided at the back of the refrigerator 30 to the maximum extent. Also in the present embodiment, the foremost part of the control board storage 61 is provided behind the front surface of the heat insulating box 31 and the control board storage when the user of the refrigerator 30 opens the standing door on the front of the refrigerator 30. The visibility of the part 61 can be reduced, and the appearance quality of the refrigerator can be improved.

  Similarly, the width is substantially the same as the width of the steel plate cover 43, and visibility from the side of the refrigerator 30 can also be reduced by forming it at least inside the portion where the guide plate 53 is present. Further, since the cooling air for 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 flow is obstructed and the amount of air flowing through the upper machine chamber 36 is reduced. , Leading to a reduction in heat dissipation performance. By disposing the control board storage 61 from the portion where the guide plate 53 is located, this reduction in the air volume can be suppressed and the heat radiation performance can be ensured.

  As described above, the refrigerator configuration according to the present invention preferentially takes in air from a low temperature space in front of the refrigerator to the machine room and sends warm exhaust to the front of the refrigerator, thereby increasing the temperature in the machine room. Since it can be suppressed and the reliability can be improved, it can also be applied to household or commercial refrigerators and other industrial equipment in which a heating element is cooled by forced air cooling.

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 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 portion 49 Top surface portion 49a Top surface opening portion 50 Back surface portion 51 Windward resin cover 52 Windward louver 53 Guide plate 54 Convex wall 55 Concave part 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 (6)

A machine room provided with a step at the upper back of the heat insulation box, a compressor and a blower provided in the machine room, a machine room cover covering the upper surface of the machine room, and an upper surface of the machine room And an opening provided on the left and right, wherein 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. The refrigerator of Claim 1 which has a convex part ahead of the said machine room. The refrigerator according to claim 2, wherein the convex part is a control board storage part. The refrigerator according to claim 2, wherein the convex portion is disposed adjacent to the machine room. The refrigerator according to any one of claims 2 to 4, wherein the upper surface of the convex portion and the upper surface of the machine room cover have substantially the same height. The refrigerator according to any one of claims 1 to 5, wherein a louver having a plurality of guide plates facing forward is provided in the opening.

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