JP5402727B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator in which a condenser and a compressor are air-cooled by a fan and efficiently radiates heat while suppressing an increase in the temperature of air to be sucked.

  In a home refrigerator, a condenser that is air-cooled by a fan is used. However, in the refrigerator for home use, the size of the condenser main body and the air passage is restricted from the viewpoint of space saving, and there is a concern that the air passage is blocked due to dust adhering to the room.

  Therefore, a design of a machine room in consideration of sparseness and dust adhesion has been proposed.

  Hereinafter, a conventional refrigerator will be described with reference to the drawings.

  8 is a cross-sectional view of a machine room of a conventional refrigerator, FIG. 9 is a cross-sectional view taken along line AA in FIG. 8, and FIG. 10 is a cross-sectional view taken along line BB in FIG.

  8 to 10, 51 is a refrigerator, 52 is a machine room, 53 is a condenser, 54 is a fan, and 55 is a compressor. A fan 54 and a compressor 55 are disposed. Reference numeral 56 denotes an air suction port for taking air into the machine chamber 52, 57 denotes an air discharge port for discharging the air heat-exchanged in the machine chamber 52, and 58 denotes the vicinity of the air suction port 56 and the vicinity of the air discharge port 57. It is a communication port that communicates.

  About the conventional refrigerator comprised as mentioned above, the operation | movement is demonstrated below.

  By driving the fan 54, the outside air at the lower and front sides of the refrigerator 51 is sucked from the air inlet 56 to cool the condenser 53, and then the heat exchanged air is supplied to the compressor 55 via the fan 54. The air is cooled and discharged from the air discharge port 57 to the outside of the machine room 52. Further, even when the air suction port 56 is blocked due to dust adhesion, air circulation is generated from the condenser 53 to the fan 54 and the compressor 55 through the communication port 58, so that the air cooling operation can be maintained.

Japanese Patent Laid-Open No. 2002-295554

  However, in the conventional configuration, since the air suction port 56 and the air discharge port 57 are in the vicinity, the high temperature air discharged from the air discharge port 57 and the outside air are mixed and taken in from the air suction port 56. As a result, the temperature of the air sucked into the machine room 52 is high, and the condenser 53 and the compressor 55 cannot be efficiently air-cooled. Similarly, it is difficult to maintain a sufficient heat dissipation capability even if high-temperature air is circulated through the communication port 58. As described above, since it is difficult to secure the distance between the air suction port 56 and the air discharge port 57 in the household refrigerator from the viewpoint of space saving, there is a problem of suppressing an increase in the temperature of the sucked air. It was. In particular, when installing a refrigerator in a limited space such as a system kitchen, the casing outline other than the front face that opens and closes the door is in close proximity to the wall. The increase in air temperature becomes more remarkable.

  The present invention solves the above-described conventional problems, and an object of the present invention is to provide a refrigerator that efficiently radiates heat by suppressing an increase in the intake air temperature with a simple configuration.

In order to solve the above-described conventional problems, the refrigerator of the present invention is a top-mount type refrigerator in which an air-cooled condenser, a first fan, and a compressor are installed in the upper rear portion. A second fan provided, a communication air passage formed at the rear corner portion and communicating between the discharge side of the second fan and the suction side of the air-cooled condenser, and an evaporating dish for storing defrosted water in the refrigerator The second fan and the evaporating dish are installed on the windward side of the lower discharge side grill of the lower machine room cover that covers the lower machine room, and the second fan is attached to the evaporating dish. While facing each other, it is arranged to be inclined in the vertical direction toward the lower discharge grill . As a result, it is possible to efficiently dissipate heat while suppressing an increase in the intake air temperature.

  The refrigerator of the present invention can efficiently dissipate heat while suppressing an increase in the intake air temperature, and the fan and the condenser can be reduced in size and energy can be saved by reducing the condensation temperature.

Vertical sectional view of the machine room of the refrigerator in the first embodiment of the present invention. The perspective view of the evaporating dish and fan of the refrigerator in Embodiment 1 of this invention Sectional drawing of the lower machine room of the refrigerator in Embodiment 1 of this invention The perspective view of the back lower part of the refrigerator in Embodiment 1 of this invention The perspective view which removed the upper machine room cover of the refrigerator in Embodiment 1 of this invention The perspective view which mounted | wore with the ventilation duct of the refrigerator in Embodiment 1 of this invention AA line sectional view of FIG. Cross-sectional view of a conventional refrigerator machine room AA line sectional view of FIG. BB sectional view of FIG.

The invention according to claim 1 is a top-mount type refrigerator in which an air-cooled condenser, a first fan, and a compressor are installed on the upper back, and a second fan provided in the lower machine room on the back is formed on the rear corner portion has a communication air passage communicating, and evaporating dish for storing the defrosted water in the refrigerator the suction side of the discharge side to the air-cooled condenser of the second fan, the lower The second fan and the evaporating dish are installed on the windward side of a lower discharge side grill of a lower machine room cover that covers the machine room. The second fan faces the evaporating dish and the lower discharge It is arranged so as to be inclined in the vertical direction toward the side grille, can keep the ventilation resistance on the discharge side of the second fan low, and further the temperature is lower than the outside air due to evaporation of defrost water. Supply air volume to air-cooled condenser Since it can be efficiently dissipated.

The invention according to claim 2 is the refrigerator according to claim 1 , wherein the lower air passage cut off structure of the left and right rear corners is different, so that the lower part of the refrigerator sucked from the lower suction grill Therefore, it is possible to efficiently dissipate heat since the outside air having a relatively low temperature can be supplied to the air-cooled condenser.

A third aspect of the present invention is the refrigerator according to the first or second aspect , further comprising a ventilation duct that communicates the discharge side grill of the lower machine room cover and the suction side grill of the upper machine room cover. Therefore, since relatively low temperature air in the lower part of the refrigerator sucked from the lower suction grille can be supplied to the air-cooled condenser through the air duct, heat can be efficiently radiated.

Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the same reference numerals are given to the same components as those of the conventional example, and detailed description thereof will be omitted. The present invention is not limited to the embodiments.

(Embodiment 1)
1 is a longitudinal sectional view of a machine room of a refrigerator according to Embodiment 1 of the present invention, FIG. 2 is a perspective view of an evaporating dish and a fan of the refrigerator according to Embodiment 1, and FIG. 3 is a perspective view of the refrigerator according to Embodiment 1. 4 is a partial cross-sectional view of the lower machine room, FIG. 4 is a perspective view of the lower back of the refrigerator according to the first embodiment, FIG. 5 is a perspective view with the upper machine room cover of the refrigerator according to the first embodiment removed, and FIG. FIG. 7 is a cross-sectional view taken along line AA in FIG. 6, and FIG. 7 is a perspective view in which the ventilation duct of the refrigerator in the first embodiment is mounted.

  In FIG. 1, 11 is a refrigerator, 12 is a housing of the refrigerator 11, 13 is an upper machine room installed at the upper back of the housing 12, 14 is an air-cooled condenser, 15 is a first fan, and 16 is a compressor. is there. In the upper machine room 13, an air-cooled condenser 14, a first fan 15, and a compressor 16 are installed in order from the windward side, and the air-cooled condenser 14 and the compressor 16 are driven by driving the first fan 15. Air cooled.

  Here, the first fan 15 is attached to the fan ring 17, and the fan ring 17 divides the air path in the upper machine chamber 13 into the windward side and the leeward side of the first fan 15. In addition, a bypass air passage 18 through which the outside air that is directly sucked into the first fan 15 without passing through the air-cooled condenser 14 passes is formed above the air-cooled condenser 14. The bypass air passage 18 supplies outside air directly to the first fan 15 when the air-cooled condenser 14 is blocked due to dust adhesion or the like, and has a height of about 10% to 15% of the air-cooled condenser 14. A space of 5 to 15 mm corresponding to is desirable. If the height of the bypass air passage 18 is less than 5 mm (10%), the air flow rate is significantly reduced when the air-cooled condenser 14 is completely blocked. If the height of the bypass air passage 18 is higher than 15 mm (15%), the air-cooled condenser The air volume which passes 14 falls and sufficient heat dissipation capability is not obtained.

  Further, 19 is a lower machine room installed at the lower back of the housing 12, 20 is a second fan, 21 is an evaporating dish for storing defrosted water in the cabinet (not shown), and 22 is the housing 12 This is a communication air passage provided in the back corner. In the lower machine room 19, an evaporating dish 21 and a second fan 20 are installed in order from the windward side. By driving the second fan 20, the outside air near the lower part of the housing 12 is sucked and evaporated. While evaporating the defrost water stored in the tray 21, the outside air cooled by the evaporation of the defrost water is supplied to the air-cooled condenser 14 via the evaporation tray 21 and the communication air passage 22. By installing the evaporating dish 21 on the windward side of the second fan 20, the ventilation resistance on the discharge side of the second fan 20 can be kept low, and the temperature is lower than the outside air due to evaporation of defrost water. Since a sufficient amount of air can be supplied to the air-cooled condenser 14, heat can be radiated efficiently. Further, when the amount of defrosted water in the evaporating dish 21 is insufficient, as shown in FIG. 2, a lid 23 can be installed on the upper part of the evaporating dish 21 to form an air passage, thereby increasing the amount of evaporation. . Also, as shown in FIG. 3, by installing the second fan 20 and the evaporating dish 21 on the windward side of the lower discharge side grille 26 of the lower machine room cover 24, the air that has exited the lower discharge side grille 26 becomes the second again. Since the shortcut is suppressed without being sucked into the fan 20, a sufficient amount of air can be supplied to the air-cooled condenser 14, so that heat can be radiated efficiently.

The second fan is arranged to be inclined toward the lower discharge side grille 26 with respect to the evaporating dish 21. By inclining and attaching, the air whose temperature has decreased while efficiently evaporating the defrost water in the evaporating dish 21 can be efficiently supplied to the lower discharge side grille 26. The inclination angle is preferably up to 15 degrees. This is because if the inclination angle exceeds 15 degrees, the efficiency of evaporation deteriorates. In the case where the second fan is disposed, the lower end portion of the second fan is preferably located above the lower end portion of the ventilation path provided at the rear corner portion of the lower discharge side grill 26. By setting it as such a structure, the wind of a 2nd fan will be transmitted to upper part appropriately. In addition, since the compressor 16 and the air-cooled condenser 14 which are main heat sources are arranged in the upper machine chamber 13, the outside air near the lower portion of the casing 12 sucked by the second fan 20 is the outside air above the casing 12. However, it is desirable not to provide a main heat source in the lower machine chamber 19, but the defrost water in the evaporating dish 21 is sufficiently evaporated by only the evaporation promoting effect of the second fan 20. If this is not possible, a radiator (not shown) having a sufficiently smaller capacity than the air-cooled condenser 14 may be disposed in the evaporating dish 21.

  Here, the communication air passage 22 is formed by cutting out the vertical side of the back surface of the housing 12, and the refrigerator 11 is installed in a limited space such as a system kitchen, and the back surface and the side surface of the refrigerator 11 are close to the wall. In this case, the air flow path that communicates the lower machine room 19 and the upper machine room 13 is formed.

  Here, the air passage cross-sectional area of the communication air passage 22 is provided with substantially the same size as the sum of the cross-sectional areas of the portions that become the air passage of the suction side rear grille 33. As a result, air is appropriately sucked through the communication air passage 22 into the upper machine chamber.

  In order to efficiently flow outside air through the communicating air passage, the roller cover a <b> 27 is provided at the lower portion of the communicating air passage 22 as shown in FIG. 4. The roller cover a <b> 27 is a separate member from the lower machine room cover 24 and is screwed to the housing 12. The height of the roller cover a27 is arranged such that the upper end of the roller cover a27 is higher than the lower end of the lower machine chamber cover 24 and lower than the lower end of the lower discharge side grill 25 provided in the lower machine chamber cover 24. Is done. As a result, the lower machine room cover 24 can be held from the side surface, and an air passage for urging the air flowing from the lower discharge side grill 25 to the communication air passage 22 can be configured. The roller cover b28 is provided at the lower portion of the communication air passage 22 and is configured as a separate member from the lower machine room cover 24 and screwed to the housing 12 in the same manner as the roller cover a27. A vent 29 is provided in the cover b28. Thereby, outside air can be efficiently flowed to the connected air path. In particular, when the refrigerator 11 is installed in a limited space such as a system kitchen, outside air having a relatively low temperature at the lower part of the refrigerator 11 is sucked from the ventilation port 29 of the roller cover b28 and supplied to the inside of the lower machine room 19. The The outside air discharged from the lower discharge side grill 26 through the lower machine chamber 19 is supplied to the air-cooled condenser 14 as it rises in the communicating air path because the roller cover a27 serves as ventilation resistance. As described above, since the lower structures of the left and right rear corner portions are different, the lower air can be appropriately supplied to the upper portion, so that heat can be efficiently radiated.

  In FIG. 5, 31 is an upper machine room cover, 32 is an upper machine room cover 31 that is provided in the upper machine room cover 31 and sucks outside air from above the refrigerator 11, and 33 is provided in the upper machine room cover 31 and is a communication air passage. An upper suction side rear grille for sucking outside air from 22, and an upper discharge side grille for exhausting upward of the refrigerator 11. Here, the upper suction side rear grille 33 has a shape recessed from the wall surface of the housing 12, so that the communication air passage 22 can be communicated even when the rear surface or side surface of the refrigerator 11 is close to the wall. As a result, as described above, when the refrigerator 11 is installed in a limited space such as a system kitchen, the outside air is sucked from the communication air passage 22 through the suction side rear grille 33, so that the upper machine room 13 is moved upward. It is possible to remarkably suppress the influence of the high-temperature exhaust discharged. Further, as shown in FIGS. 6 and 7, a ventilation duct 30 having an air passage communicating the lower discharge side grill 26 and the upper suction side rear grill 33 may be provided. Thereby, since the air of the comparatively low temperature of the lower part of the refrigerator 11 sucked from the lower suction side grill 25 can be supplied to the air-cooled condenser 14 via the air duct 30, heat can be efficiently radiated.

With such a configuration, both the outside air sucked from above the refrigerator 11 and the outside air sucked from the communication air passage 22 pass through the upper machine chamber 13, and the compressor 16 serving as a main heat source and the air-cooled condensing. The vessel 14 is air cooled. As a result, outside air can be supplied to the compressor 16 and the air-cooled condenser 14 while maintaining a situation in which dust is hardly clogged, so that the reliability is high.

  It is also possible to increase the cooling efficiency by considering the relative value of the air volume of the first fan and the second fan. The relative value of the air volume of the second fan 20 with respect to the first fan 15 is preferably set to 25 to 100%.

  By setting the relative value of the air volume of the second fan 20 to 25 to 100%, air from below can be efficiently supplied upward, and a greater heat dissipation effect can be obtained. When the relative value of the air flow rate of the second fan 20 with respect to the first fan 15 is set to 25% or less, the cooling effect by the second fan 20 is hardly obtained, and the second value with respect to the first fan 15 is not obtained. When the relative value of the air volume of the fan 20 is 100% or more, even if a larger air volume than that of the first fan 15 is supplied from the second fan 20, the upper machine room 13 has a certain amount of outside air. Is not inhaled, so a cooling effect equal to or greater than 100% cannot be obtained. As a result, the amount of power of the second fan 20 only increases.

  Further, if the relative value of the air volume of the second fan 20 is set to 80 to 100%, a larger cooling effect can be obtained. By setting the relative value of the air volume of the second fan 20 to 80 to 100%, the amount of high-temperature exhaust discharged upward from the upper machine chamber 13 is reduced by reducing the amount of suction from the suction side top grill 32. The upper machine room 13 is not inhaled. Therefore, the influence of the high-temperature exhaust discharged upward from the upper machine room 13 can be almost eliminated, and the temperature of the air sucked into the upper machine room 13 can be lowered.

  The first fan 15 is controlled to be driven in conjunction with the driving of the compressor 16 regardless of the outside air temperature, and the second fan 20 is linked to the driving of the compressor 16 at an outside air temperature higher than the reference temperature. And may be controlled to stop at an outside air temperature lower than the reference temperature.

  In the outside temperature above the reference temperature at which the work amount of the compressor 16 increases, especially when the refrigerator 11 is installed in a limited space such as a system kitchen and the wall is close to the top of the refrigerator 11, The high-temperature air discharged upward from the upper machine room 13 is likely to flow around the upper portion of the housing 12, and the rise in the temperature of the air sucked from above the refrigerator 11 via the suction-side top grill 32 is further increased. Become prominent. On the other hand, by driving the second fan 20 in conjunction with the drive of the compressor 16, outside air having a relatively low temperature is sucked from the communication air passage 22 through the suction side rear grille 33, and the housing 12 The influence of the high-temperature air staying in the vicinity of can be remarkably suppressed. As a result, it is possible to efficiently dissipate heat while suppressing an increase in the intake air temperature, and it is possible to reduce the size of the first fan 15 and the air-cooled condenser 14 and to save energy by reducing the condensation temperature. it can. The reference temperature is preferably set to 20 to 30 ° C. according to the indoor temperature in summer when the work of the compressor 16 increases.

  When the compressor 16 is a variable speed compressor, the speeds of the first fan 15 and the second fan 20 may be varied in accordance with the capacity of the compressor 16. When the compressor 16 has the maximum capacity, the heat dissipating capacity can be ensured by controlling the air volume of the first fan 15 and the second fan 20 to the maximum. On the other hand, when the compressor 16 is not at its maximum capacity, the drive power can be suppressed and energy saving can be achieved by controlling the air volume of the first fan 15 and the second fan 20 to be controlled. .

At an outside air temperature that is less than the reference temperature where the work of the compressor 16 is small, the second fan 20 can be stopped to reduce drive power. If the defrost water in the evaporating dish 21 cannot be sufficiently evaporated if the second fan 20 is always stopped, the second fan 20 may be driven for a predetermined time while the compressor 16 is stopped.

  As described above, the temperature rise of the air-cooled condenser and the compressor is particularly problematic, and at the time of high outside air temperature, the second fan is driven to efficiently cool, and the temperature rise of the air-cooled condenser and the compressor is not particularly problematic. When the outside temperature is low, the second fan can be stopped to save energy.

  As described above, the refrigerator according to the present invention has the second fan that supplies the outside air to the condenser separately from the first fan that is the main drive source of the blower circuit. As a result, it is possible to efficiently dissipate heat while suppressing an increase in the intake air temperature.

  As described above, the refrigerator according to the present invention can efficiently dissipate heat by suppressing an increase in the temperature of the air sucked in the refrigerator in which the condenser and the compressor are air-cooled by a fan. It can also be applied to frozen and refrigerated products.

DESCRIPTION OF SYMBOLS 11 Refrigerator 13 Upper machine room 14 Air-cooled condenser 15 1st fan 16 Compressor 19 Lower machine room 20 2nd fan 21 Evaporating dish 22 Ventilation passage 24 Lower machine room cover 26 Lower discharge side grill 30 Ventilation duct 31 Upper machine Room cover 33 Upper suction side grill

Claims (3)

In a top mount type refrigerator in which an air-cooled condenser, a first fan, and a compressor are installed on the upper back, the second fan provided in the lower machine room on the back is formed at the rear corner, A lower machine chamber cover having a communication air passage communicating the discharge side of the second fan and the suction side of the air-cooled condenser, and an evaporating dish for storing defrosted water in the cabinet , and covering the lower machine chamber The second fan and the evaporating dish are installed on the windward side of the lower discharge side grill. The second fan faces the evaporating dish and is inclined in the vertical direction toward the lower discharge side grill. A refrigerator characterized by being arranged . The refrigerator according to claim 1 , wherein the lower air passage configurations of the left and right rear corner portions are different. The refrigerator according to claim 1 or 2 , further comprising a ventilation duct that communicates the lower discharge side grill of the lower machine room cover and the upper suction side grill of the upper machine room cover.