JP2011208904A - Refrigerator - Google Patents

Abstract

[PROBLEMS] To achieve both space saving in a space around a condenser, which is a problem when installing a refrigerator in a limited space, and suppression of a decrease in air volume when dust adheres to the condenser.
In a refrigerator having a lower machine room 15, a fan 20 as a main driving source of a blower circuit, an evaporating dish 19 installed on the leeward side of the fan 20, and a cylindrical spiral fin above the evaporating dish 19 are provided. A tube-type condenser 18 is provided, and an intake port 23 is provided on one side of the lower machine chamber 15 in the left-right direction, and an exhaust port 24 is provided on the other side. As a result, it is possible to suppress a decrease in the air volume when dust adheres to the condenser 18 while preventing the influence of a shortcut in which the discharged air is sucked again. By reducing the energy, energy can be saved and the defrosted water staying in the evaporating dish 19 can be efficiently evaporated.
[Selection] Figure 2

Description

  The present invention relates to a refrigerator that has a condenser, an evaporating dish, and a fan in a machine room, and efficiently performs the heat radiation of the condenser and the evaporation of defrost water accumulated in the evaporating dish even when dust adheres. is there.

  From the standpoint of energy saving, in addition to the condenser that is attached to the inside of the outer casing of the household refrigerator and naturally air-cooled from the outer casing, a condenser that is installed outside the outer casing and that is air-cooled by a fan is used together. Is done. However, in the refrigerator for home use, the size of the condenser main body and the air path is restricted from the viewpoint of space saving, and there is a concern that the condenser main body and the air path may be blocked due to adhesion of indoor dust.

  Therefore, a condenser design that takes into account space saving and dust adhesion has been proposed. In particular, spiral fin tube type condensers, in which fins made of strips are spirally wound around the outer periphery of the refrigerant pipe, are less likely to adhere to dust and can be shaped relatively freely. It is used for installing in a room and obtaining a high heat dissipation capability (see, for example, Patent Document 1).

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

  FIG. 5 is a longitudinal sectional view of a lower machine room of a conventional refrigerator, and FIG. 6 is a transverse sectional view of a lower machine room of a conventional refrigerator.

  In FIG. 5, reference numeral 40 denotes a lower machine room of the refrigerator, 41 denotes a heat insulating wall of a storage room (not shown) that forms the upper surface of the lower machine room 40, 42 denotes a bottom plate of the lower machine room 40, and 43 denotes a lower machine room 40. A condenser installed inside, 44 is a fan for air-cooling the condenser 43, and 45 is a leg that supports the casing of the refrigerator.

  Here, the condenser 43 is formed of a spiral fin tube in which a strip-shaped fin 47 is wound around the refrigerant pipe 46, and the refrigerant pipe 46 is formed by bending in a meandering manner on the same plane. In general, when the refrigerant pipe 46 of the condenser 43 formed of a spiral fin tube is bent in a meandering manner on the same plane, the refrigerant pipe 46 is bent with a minimum bend R so that the interval between the refrigerant pipes 46 is minimized. And the distance between fins (henceforth fin pitch) at the time of winding the strip | belt-shaped fin 47 around the refrigerant | coolant piping 46 is changed so that it may become small toward a leeward side.

  The air cooling fan 44 is installed on the back side of the lower machine room 40 and sucks external air from a plurality of air inlets 48 provided in the bottom plate 42 and a second air inlet 49 provided on the front surface of the lower machine room 40. Then, the condenser 43 is air-cooled. The number of intake ports 48 provided in the bottom plate 42 is changed so as to decrease toward the leeward side.

  In FIG. 6, 50 is an evaporating dish for storing defrosted water in a storage chamber (not shown), 51 is an immersion pipe for heating water stored in the evaporating dish, 52 is a compressor, and 53 is an outlet. , 54 are partition walls that divide the lower machine chamber 40.

  Here, the air that has passed while cooling the condenser 43 is collected on the upper part of the evaporating dish 50 by the partition wall 54, then passes through the fan 44, cools the compressor 52, and is discharged from the discharge port 53 to the outside. . At this time, the periphery of the evaporating dish 50 is dried by air heated by exchanging heat with the condenser 43, thereby promoting the evaporation of water stored in the evaporating dish 50.

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

  By increasing the fin pitch on the windward side of the condenser 43 and increasing the number of the windward side of the intake port 48, the windward resistance on the windward side of the condenser 43 is reduced, and the windward resistance on the leeward side. Is relatively increased, it is possible to prevent the air exhausted from the exhaust port 53 from being short-circuited to the leeward intake port 48. As a result, the heat exchange capacity on the windward side of the condenser 43 far from the fan 44 can be used effectively.

  Moreover, by installing the condenser 43 and the compressor 52 in the same air path, the compressor 52 can be simultaneously cooled using the air that has passed while cooling the condenser 43.

  Thus, when cooling the condenser 43 formed in a plane in a place where the height is strictly regulated like the lower machine room 40 of the refrigerator, the relatively high temperature air discharged from the outlet 53 is the condenser. It is important to suppress a shortcut to be taken in again from the leeward side air inlet 48 of 43. When the shortcut occurs, problems such as a significant decrease in the heat dissipation capability of the condenser 43 and an increase in power consumption occur.

Japanese Patent Laid-Open No. 9-292188

  However, in the configuration of the conventional refrigerator, in order to reduce the fin pitch on the leeward side of the condenser 43 and reduce the number of the air inlets 48, dust adheres to the vicinity of the air inlets 48 on the leeward side of the condenser 43. There was a problem that the intake port 48 was blocked in a short time. When the leeward intake port 48 of the condenser 43 is closed, the air flowing in from the leeward side rises in temperature while exchanging heat with the condenser 43, so that the condensation temperature of the condenser 43 rises and the power consumption increases. Cause.

  Further, in the conventional refrigerator configuration, since the compressor 52 is housed in the lower machine room 40, the shape of the air path in the lower machine room 40 is distorted, the air path resistance is increased, and the exhaust heat of the compressor 52 is exhausted. As the temperature of the air discharged from the outlet 53 rises, there has been a problem that the temperature rise of the intake air when a shortcut for taking in again from the intake port 48 occurs increases.

  Therefore, while suppressing the air path resistance in the lower machine room 40, the influence of the shortcut in which the discharged air is re-intaken from the intake port 48 is prevented, and clogging due to dust adhesion on the leeward side of the condenser 43 is prevented. It was a problem to suppress.

  SUMMARY OF THE INVENTION The present invention solves the conventional problems, and provides a refrigerator that has a simple configuration that can prevent the influence of a shortcut to re-exhale the discharged air and suppress the reduction in the air volume when dust adheres to the condenser. The purpose is to provide.

  In order to solve the conventional problems, a refrigerator according to the present invention is a refrigerator having a lower machine room, a fan serving as a main driving source of a blower circuit, an evaporating dish installed on the leeward side of the fan, and the evaporating dish A cylindrical spiral fin-tube condenser is provided above, and an intake port is provided on one side in the left-right direction of the lower machine chamber, and an exhaust port is provided on the other side. As a result, the distance between the air inlet and the air outlet can be reduced to reduce the shortcut, and even if dust adheres to the condenser, the reduction in the amount of air flowing to the evaporating dish can be suppressed, and the heat dissipation capacity of the condenser can be reduced. By suppressing, the heat radiation of the condenser and the defrost water staying in the evaporating dish can be efficiently evaporated.

  The refrigerator according to the present invention can suppress the effect of a shortcut in which the discharged air is re-intaken, and can suppress a decrease in the air volume when dust adheres to the condenser. It is possible to save energy by reducing the amount of water and to efficiently evaporate the defrosted water staying in the evaporating dish.

The longitudinal cross-sectional view of the refrigerator in Embodiment 1 of this invention The rear top view of the refrigerator in Embodiment 1 of this invention The perspective view of the evaporating dish and fan unit of the refrigerator in Embodiment 1 of this invention The perspective view of the refrigerator condenser in Embodiment 1 of this invention Vertical section of the lower machine room of a conventional refrigerator Cross-sectional view of the lower machine room of a conventional refrigerator

  The invention according to claim 1 is a refrigerator having a lower machine room, a fan which is a main driving source of the blower circuit, an evaporating dish installed on the leeward side of the fan, and a cylindrical shape above the evaporating dish Since the refrigerator has a spiral fin tube condenser and is provided with an intake port on one side in the left-right direction of the lower machine room and an exhaust port on the other side, the distance between the intake port and the exhaust port is increased. In addition to suppressing shortcuts, even when dust adheres to the condenser, it is possible to suppress a decrease in the amount of air flowing to the evaporating dish and to suppress a decrease in the heat dissipating capacity of the condenser. Evaporation of defrost water can be performed efficiently.

  The invention according to claim 2 is the refrigerator according to claim 1, wherein at least a part of the condenser is provided inside the evaporating dish. When the amount of defrost water stays, the defrost water comes into contact with the condenser, the temperature of the defrost water rises, and the defrost water can be evaporated more efficiently. By contacting the water, the condensation temperature can be reduced, the heat radiation capacity can be increased, and the energy can be saved.

  The invention according to claim 3 is the refrigerator according to the invention according to claim 1 or 2, wherein the compressor is installed on the upper back of the refrigerator, so that the space of the lower machine room can be increased, Since a larger area evaporating dish and a higher volume condenser can be installed, energy can be further saved by increasing the capacity of the condenser, and defrosted water can be evaporated more efficiently.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, detailed description of the same configurations as those of the conventional example will be omitted. The present invention is not limited to the embodiments.

(Embodiment 1)
1 is a longitudinal sectional view of a refrigerator according to Embodiment 1 of the present invention, FIG. 2 is a rear plan view of the refrigerator according to Embodiment 1 of the present invention, and FIG. 3 is an evaporating dish of the refrigerator according to Embodiment 1 of the present invention. FIG. 4 is a perspective view of the fan unit, and FIG. 4 is a perspective view of the refrigerator condenser according to Embodiment 1 of the present invention.

  1 to 4, 11 is a refrigerator, 12 is a housing of the refrigerator 11, 13 is a bottom of the housing 12, 14 is a door of the refrigerator 11, and 15 is a lower machine room provided at the lower back of the housing 12, Reference numeral 16 denotes an upper machine room provided at the upper back of the housing 12, and 17 denotes a compressor housed in the upper machine room 16.

  Further, 18 is a condenser housed in the lower machine chamber 15, 18 a is a front edge of the condenser 18, 19 is an evaporating dish housed in the lower machine room 15, and 20 is an air-cooling condenser 18, evaporating dish 19 is a fan that promotes evaporation of the defrosted water staying in 19, and the condenser 18 and the evaporating dish 19 are arranged on the leeward side of the fan 20, and the condenser 18 is arranged above the evaporating dish 19. At least a portion is provided inside the evaporating dish 19. 21 is a drain port for discharging defrost water to the evaporating dish 19 when defrosting a cooler (not shown), 22 is a lower machine room cover provided on the back of the lower machine room 15, and 23 is a lower machine room cover 22. The air inlet 24 provided in the lower machine room cover 22 is provided in the lower machine room cover 22, and the air outlet 25 provided at a position opposite to the air inlet 23. 25 is the evaporating dish 19 in which the fan 20 is installed in the evaporating dish 19 and the fan 20. Unit.

  As shown in FIG. 4, the condenser 18 is a cylindrical spiral fin tube condenser configured by spirally laminating a spiral fin tube in which a strip-shaped fin 27 is wound around a pipe 26. A hollow portion 28 is provided at the center portion.

  About the refrigerator in Embodiment 1 of this invention comprised as mentioned above, the operation | movement is demonstrated below.

  The fan 20 is driven in conjunction with the operation of the compressor 17. The air taken into the lower machine chamber 15 from the air inlet 23 by the drive of the fan 20 is sucked into the fan 20, and the air discharged from the fan 20 is defrosted water staying in the condenser 18 or the evaporating dish 19. It passes through the surface and is discharged from the exhaust port 24 to the outside of the lower machine chamber 15. By driving the fan 20, air passes through the surface of the defrost water staying in the condenser 18 and the evaporating dish 19, so that the heat radiation of the condenser 18 and the evaporation of the defrost water staying in the evaporating dish 19 are promoted. .

  At this time, since the intake port 23 and the exhaust port 24 are provided at opposite ends in the left-right direction of the lower machine room 15, there is a sufficient distance, and the air exhausted from the exhaust port 24 is again supplied from the intake port 23. Shortcuts such as inhalation can be suppressed.

  Further, even when the front edge portion 18a of the condenser 18 is blocked by dust or the like, air passes through the cavity portion 28 provided in the condenser 18, and the fin 27 facing the cavity portion 28 and the air exchange heat. Therefore, it is possible to suppress the deterioration of the heat dissipation capability of the condenser 18.

  In addition, by providing a part of the condenser 18 in the evaporating dish 19, if a certain amount of defrosted water stays in the evaporating dish 19, the defrosted water comes into contact with the condenser 18, thereby removing the defrosted water. As the temperature of the defrosting water rises, the defrosting water can be evaporated more efficiently, and the condenser 18 comes into contact with the defrosting water, so that the condensation temperature can be reduced, the heat dissipating capacity is increased, and the energy is saved. I can plan.

  Further, since the compressor 17 is installed in the upper machine room 16 at the upper back of the refrigerator, the space of the lower machine room 15 can be increased, and a larger area evaporating dish 19 and a higher volume condenser 18 are installed. Therefore, energy can be further saved by increasing the capacity of the condenser 18, and the defrost water can be evaporated more efficiently.

  As described above, the refrigerator of the present invention is a refrigerator having the lower machine room 15. The fan 20 as a main driving source of the blower circuit, the evaporating dish 19 installed on the leeward side of the fan 20, and the evaporating dish 19 A cylindrical spiral fin tube type condenser 18 is provided above, and an intake port 23 is provided on one side of the lower machine chamber 15 in the left-right direction, and an exhaust port 24 is provided on the other side. As a result, it is possible to suppress a decrease in the air volume when dust adheres to the condenser 18 while preventing the influence of a shortcut in which the discharged air is sucked again. By reducing the energy, energy can be saved and the defrosted water staying in the evaporating dish 19 can be efficiently evaporated.

  As described above, in the refrigerator according to the present invention, in the refrigerator in which the condenser is air-cooled by a fan, the air flow at the time of dust adhering to the condenser is reduced while preventing the effect of the shortcut that the discharged air is sucked again. Energy saving can be achieved by reducing the condensation temperature by improving the heat dissipating ability of the condenser, and the defrosted water staying in the evaporating dish can be efficiently evaporated.

DESCRIPTION OF SYMBOLS 12 Housing | casing 15 Lower machine room 18 Condenser 18a Front edge part 19 Evaporating dish 20 Fan 21 Drain port 22 Lower machine room cover 23 Intake port 24 Exhaust port

Claims (3)

In a refrigerator having a lower machine room, a fan serving as a main driving source of a blower circuit, an evaporating dish installed on the leeward side of the fan, and a cylindrical spiral fin tube condenser above the evaporating dish The refrigerator is characterized in that an intake port is provided on one side in the left-right direction of the lower machine room and an exhaust port is provided on the other side. The refrigerator according to claim 1, wherein at least a part of the condenser is provided inside the evaporating dish. The refrigerator according to claim 1 or 2, wherein the compressor is installed on the upper back of the refrigerator.

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