JP2008002733A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem wherein volume efficiency of a storage compartment can not be improved as it is necessary to increase an opening area of an evaporation pan since a velocity of wind passing through a surface of the evaporation pan of a refrigerator is low. <P>SOLUTION: A second machine chamber is disposed at a lowermost rear part of a refrigerator main body, a defrosted water evaporating device is disposed in the second machine chamber, and an evaporator, a drainage passage for collecting the defrosted water of the evaporator to part thereof, and a drainage pipe 15 for discharging the defrosted water to the outside, are disposed in a refrigerator main body at an upper position of the defrosted water evaporating device. The defrosted water evaporating device has an outer hull composed of an evaporation pan 16 and a sealing plate 17, the sealing plate 17 is positioned at a center of a top face of the evaporation pan 16 and provided with opening portions at both sides, and an air trunk of the defrosted water evaporating device is formed by two opening portions, the evaporation pan 16 and the sealing plate 17. An air blower means 18 is closely kept into contact with an outer periphery of the opening portion at one side of the opening portions to generate forced circulation of air in an air trunk, thus the evaporating performance is improved, and the opening area of the evaporation pan is reduced thereby. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a refrigerator provided with a defrosting water evaporation device.

  In recent years, refrigerators are required to be further energy-saving from the viewpoint of protecting the global environment and to be improved in usability and storage.

  A conventional refrigerator of this type has been installed on the top of the refrigerator main body, or on the upper back of the refrigerator main body using a compressor or the like forming a machine room (see, for example, Patent Document 1). ).

  The defrost water evaporation method employs a method that uses the heat obtained along with cooling or heat dissipation of the heat generating components to evaporate the defrost water stored in the evaporating dish (there are various methods for heat sources) For example, the defrost water may be directly heated).

  FIG. 5 shows a conventional refrigerator. As shown in FIG. 5, provided on the upper side of the refrigerator body 1, the refrigeration cycle storage unit 2 in which the refrigeration cycle is stored, the evaporating dish 3 provided at the lower part of the refrigerator body 1, and the refrigerator body 1. Next to the refrigeration cycle storage unit 2 are provided an evaporator 4 and heat source means 5 for removing frost on the surface of the evaporator 4. As the outside air is sucked into the water passage 6 for supplying the defrosting water dripped when the heat source means 5 is heated to the evaporating dish 3 and the refrigeration cycle storage part 2, the outside air is heated by the heat generating parts of the refrigeration cycle to warm the outside. A fan device 7 that is weathered and a duct 8 that is provided in the refrigerator main body 1 and that supplies hot air discharged from the fan device 7 to the evaporating dish 3 are provided.

Next, the outline of the configuration of the conventional refrigeration cycle will be described with reference to FIG. The high-temperature gas refrigerant discharged from the compressor 9 becomes a medium-temperature liquid refrigerant in the process of passing through the condenser 10, and becomes a low-temperature liquid refrigerant by the capillary tube 11. Evaporation occurs in the process of passing the low-temperature liquid refrigerant through the evaporator 4, and the closed-loop is returned to the compressor 9. Since the evaporator 4 has a low temperature, it forms as frost on the surface of the evaporator 4 when exchanging heat with the air in the storage compartment 12. Since the frost accumulates as the operating time of the compressor 9 elapses, the heat source means 5 is appropriately heated to remove the frost on the surface of the evaporator 4, the frost is defrosted, and the defrosted water passes through the water passage 6 to evaporate the dish. 3 is supplied. The compressor 9 and the condenser 10 which are heat generating components in the refrigeration cycle storage unit 2 are cooled and radiated by the air sucked from the outside air by the fan device 7, and the generated hot air is sent from the duct 8 to the opening of the evaporating dish 3. The water temperature in the evaporating dish 3 is increased to evaporate.
JP-A-8-247626

  In the case of this type of evaporation method, there are the following three items as factors for evaporating water. The first is the surface wind speed, the second is the water temperature, and the third is the area of the opening where water and outside air contact. However, in the above-described conventional configuration, the wind speed passing through the surface of the evaporating dish 3 is weak and water evaporation is inefficient, and since the heat source is not disposed at the bottom, the wind of the duct 8 from the heat source to the bottom is Since the heat loss in the road is large and it is inefficient to increase the water temperature, it is necessary to increase the opening area of the evaporating dish 3, and there is a problem that the volumetric efficiency of the storage chamber cannot be increased.

  The present invention solves the above-described conventional problems, and the evaporation performance can be improved by greatly improving the wind speed of the water surface, which is the first factor as a factor for evaporating water. The purpose of the present invention is to provide a refrigerator that can greatly improve the storage efficiency of food for consumers because the volumetric efficiency of the storage room can be greatly increased by reducing the area and making it compact.

  In order to solve the above-described conventional problems, a defrosting water evaporation device is disposed at the lower part of the refrigerator body, a drainage path for leading the evaporator and the defrosting water of the evaporator to a position above the defrosting water evaporation device, and defrosting The defrosting water evaporation device is provided with an evaporating dish for receiving defrosting water and a sealing plate for sealing the upper surface of the evaporating dish, with openings on both sides of the sealing plate. The air passage is formed in the internal space, the air blowing means for forcing the air to the air passage is arranged in one of the openings, and the upper side from the end face of the sealing plate of the discharge port which is the opening opposite to the air blowing means Provided with a partition plate for partitioning the space above the defrosting water evaporation device, and provided with a drain outlet which is an opening at the center of the sealing plate, and the drain pipe is disposed above the drain outlet. .

  As a result, the evaporation performance can be improved by greatly improving the wind speed of the water surface, so the opening area of the evaporating dish can be made smaller and compact, and humid air does not flow near the drain pipe. Condensation near the drain pipe can be prevented.

  The present invention solves the above-described conventional problems, and can improve the evaporation performance by greatly improving the wind speed of the water surface. Therefore, the opening area of the evaporation dish can be reduced and the storage area can be reduced. The volumetric efficiency of the room can be greatly increased, and the food storage efficiency of consumers can be greatly improved.

  Moreover, there is no worry about dew condensation or freezing in the defrost water evaporator or drainage path, and a defrost water evaporator with high evaporation efficiency can be realized.

  Invention of Claim 1 arrange | positions a defrost water evaporator in the refrigerator main body lower part, The drainage path which guides the defrost water of the evaporator and the evaporator to the upper position of the said defrost water evaporator, A drain pipe that guides the defrost water to the outside of the cabinet, wherein the defrost water evaporator includes an evaporating dish that receives the defrost water and a sealing plate that seals the upper surface of the evaporating dish, and the sealing plate An air passage is formed in the inner space with openings on both sides of the air passage, a blower means for forcibly convection of air through the air passage is disposed on one of the openings, and the discharge is an opening opposite to the blower means. A partition plate for partitioning the space above the defrosting water evaporator above the end surface of the sealing plate at the outlet is provided, and a drain port that is an opening is provided at the central portion of the sealing plate, above the drain port By disposing the drainage pipe on the surface, the wind speed on the water surface is greatly improved, the evaporation performance is improved, and the opening area of the evaporation dish Since it is possible to compact is reduced, can be increased greatly volumetric efficiency of the storage compartment, it can greatly improve the storage efficiency of the consumer of the food. Further, since humid air does not flow near the drain pipe, condensation near the drain pipe can be prevented.

  The invention according to claim 2 is the invention according to claim 1, wherein the drain port has a shape having an inclined portion toward a lower part of the sealing plate. Since the opening area of the drainage port can be reduced, it is possible to suppress a short circuit of air from the drainage port to the blowing means, and it is possible to prevent a decrease in evaporation efficiency of the defrosting water evaporation device.

  The invention according to claim 3 is the invention according to claim 1, wherein the drain port is dropped while inclining a part of the sealing plate to the discharge port side, and the flat portion of the sealing plate By comprising in a level | step-difference part, the air resistance by the sealing board of a defrost water evaporator internal air path can be suppressed, and the fall of the evaporation capability by the fall of the wind speed inside a defrost water evaporator can be prevented.

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

(Embodiment 1)
FIG. 1 is a central cross-sectional view of the refrigerator according to Embodiment 1 of the present invention.

  In FIG. 1, a first machine room 2 is disposed behind the uppermost part of the refrigerator body 1. A compressor 9 is disposed in the first machine chamber 2. A second machine room 21 is disposed at the lowermost rear of the refrigerator body 1, and a defrost water evaporation device 13 is provided in the second machine room 21. In the refrigerator main body 1 above the defrosting water evaporation device 13 in the second machine chamber 21, the evaporator 4, the drainage passage 14 for collecting the defrosting water of the evaporator 4 in part and the defrosting water are supplied to the refrigerator main body. A drain pipe 15 for discharging from the inside to the outside of the warehouse is configured.

  FIG. 2 is a schematic diagram of the defrosting water evaporator of the refrigerator according to the present embodiment. The defrosting water evaporation device 13 is configured by an evaporating dish 16 that receives defrosting water and a sealing plate 17 that seals the upper surface of the evaporating dish 16, and the sealing plate 17 is located at the center of the upper surface of the evaporating dish 16. It arrange | positions and forms an opening part in both sides, and the air path of the defrost water evaporator 13 is comprised by two opening parts, the evaporating dish 16, and the sealing board 17. FIG. On one side of the opening, the air blowing means 18 is disposed in close contact with the outer periphery of the opening to generate forced convection of air in the air passage.

  An immersion pipe 20 through which the high-pressure refrigerant of the refrigeration cycle flows is inserted into the evaporating dish 16 from a discharge port 19 which is an opening on the side opposite to the air blowing means 18. In addition, a partition plate 23 is provided above the end face of the sealing plate 17 of the discharge port 19 to partition the upper space of the defrosted water evaporator 13 into the blower means 18 side and the discharge port 19 side.

  A drain port 22 that is an opening is also provided in the central portion of the sealing plate 17, and a drain pipe 15 is disposed above the drain port 22.

  Next, the evaporating action of the defrost water evaporator 13 will be described with reference to FIGS. 1 and 2. The refrigeration cycle has the same configuration as the conventional one and will not be described in detail.

  Since the evaporator 4 has a low temperature, frost is formed on the surface of the evaporator 4 when exchanging heat with the air in the storage compartment 12. Since the frost accumulates as the operating time of the compressor 9 elapses, the heat source means 5 is heated to appropriately remove the frost on the surface of the evaporator 4, and the frost is melted to become defrosted water and dripped at the lower part of the evaporator 4. . The defrost water is collected in one place by the drainage path 14, guided to the drainage pipe 15, and directly dropped into the drainage port 22 opened at the lower part of the drainage pipe 15 and supplied into the evaporating dish 16.

  The defrost water introduced into the evaporating dish 16 is heated by the immersion pipe 20 and heated to a temperature higher than the outside air temperature, and starts to evaporate. When the defrost water starts to evaporate, the air inside the evaporating dish 16 immediately becomes saturated vapor, and the evaporation speed is slowed down. However, the saturated vapor is discharged from the discharge port 19 to the outside of the second machine chamber 21 by the operation of the blower 18. At the same time, dry air is supplied into the evaporating dish 16 from the opening on the air blowing means 18 side, and the evaporation speed of the defrost water is maintained. Moreover, since the ventilation means 18 is directly arrange | positioned at the evaporating dish 16, since the surface wind speed of the defrost water in the evaporating dish 16 is very high compared with the past, an evaporation speed is also quick. Further, since the wind generated by the air blowing means 18 is directly blown to the surface of the defrost water, the surface of the defrost water is waved by the kinetic energy of the wind, and water molecules on the surface are likely to jump out to the air side to become steam, and the evaporation rate Is further accelerated.

  It is known that the evaporation performance and the surface area of the defrost water in the evaporation dish 16 are generally in a proportional relationship. Evaporation performance and wind speed on the surface of the defrost water are also proportional to each other, and the required evaporative performance can be secured even if the surface area of the defrost water is small due to the significant improvement in the wind speed. Can be designed.

  The upper space of the evaporating dish evaporator 13 in the second machine chamber 21 is partitioned by a partition plate 23, and since the evaporated steam flows on the discharge port 19 side by the operation of the blowing means 18, the atmosphere is It becomes very high humidity. On the other hand, the air blowing means 18 side sucks outside air by the operation of the air blowing means 18, so the atmosphere has a lower humidity than the discharge port 19 side.

  Since the drain pipe 15 is disposed below the low-temperature evaporator 4, the temperature becomes lower than the outside air due to heat conduction or natural convection of low-temperature air, and the temperature of the lower part of the refrigerator main body 1 in which the drain pipe 15 is disposed is also low. Lower. By disposing the drain pipe 15 on the air blowing means 18 side of the partition plate 23, it becomes possible to prevent condensation and freezing on the drain pipe 15 and its surrounding structure.

  As described above, since the evaporation performance can be improved by greatly improving the wind speed on the water surface, the opening area of the evaporating dish 16 can be reduced and the size can be reduced, and the side of the partition plate 23 on the air blowing means 18 side. By disposing the drain pipe 15 on the surface, it is possible to prevent dew condensation and freezing on the drain pipe 15 and the surrounding structure.

(Embodiment 2)
FIG. 3 is a schematic diagram of a defrosting water evaporation device for a refrigerator according to Embodiment 2 of the present invention.

  The drain pipe 15 is disposed above the drain port 22 of the sealing plate 17, and the drain port 22 narrows a part of the sealing plate 17 down on the mortar toward the lower side of the sealing plate 17 and opens at the tip. The part is made smaller and an inclined part is formed.

  The defrost water discharged from the evaporator 4 flows along the inner wall surface of the drain pipe 15, falls on the narrowed slope of the drain port 22, and is guided into the evaporation dish 16 through the opening at the tip.

  As described above, since the opening at the tip of the drain port 22 can be made small, a short circuit of air from the drain port 22 to the blowing means 18 can be suppressed, and a decrease in the evaporation efficiency of the defrost water evaporator 13 can be prevented.

(Embodiment 3)
4 (a) and 4 (b) are schematic diagrams of a defrosting water evaporation device for a refrigerator according to Embodiment 3 of the present invention.

  The drain port 22 is a part in which the sealing plate 17 is dropped while being inclined toward the discharge port 19, and is provided with a laterally long opening at a step portion from the flat portion of the sealing plate 17. 15 is disposed above the inclined portion of the sealing plate 17.

  The defrost water discharged from the evaporator 4 flows along the inner wall surface of the drain pipe 15, falls on the inclined portion of the sealing plate 17, flows along the inclination, and is introduced into the evaporation dish 16 from the opening at the front end. It is burned.

  The drain port 22 is less likely to become air path resistance in the defrost water evaporator 13 by inclining a part of the sealing plate 17 to be thin and long. Moreover, since the opening part of the front-end | tip of the drainage port 22 turns into the opposite direction with respect to the flow direction of a wind by making it incline toward the discharge port 19 side from the ventilation means 18 side, it is from the drainage port 22 to the ventilation means 18. Air short circuit is suppressed.

  As described above, the drain port 22 is dropped while a part of the sealing plate 17 is inclined toward the discharge port 19, and an opening is provided at a step portion with respect to the flat portion of the sealing plate 17. Air resistance by the sealing plate 17 in the internal air passage of the evaporator 13 can be suppressed, and a reduction in evaporation capability due to a decrease in the wind speed inside the defrost water evaporator 13 can be prevented.

  As described above, the defrosted water evaporation apparatus for a refrigerator according to the present invention can improve the evaporation performance by greatly improving the wind speed on the water surface, and can reduce the opening area of the evaporation dish and make it compact. Therefore, it can be applied not only to refrigerators but also to various fields such as dehumidifiers, air conditioners, and vending machines where evaporation of defrost water is necessary.

Central sectional view of the refrigerator according to Embodiment 1 of the present invention. Schematic of the defrost water evaporator of the refrigerator in Embodiment 1 of the present invention Schematic of the defrost water evaporator of the refrigerator in Embodiment 2 of this invention (A) Schematic diagram of the defrosting water evaporator of the refrigerator in Embodiment 3 of the present invention (b) Schematic diagram of the defrosting water evaporator of the refrigerator in Embodiment 3 of the present invention Cross-sectional view of a conventional refrigerator Explanatory drawing of refrigeration cycle of conventional refrigerator

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Refrigerator main body 2 1st machine room 4 Evaporator 5 Heat source means 9 Compressor 12 Inside of storage chamber 13 Defrost water evaporation apparatus 14 Drainage path 15 Drain pipe 16 Evaporating dish 17 Sealing plate 18 Blower means 19 Discharge port 20 Immersion pipe 21 Second machine room 22 Drain port 23 Partition plate

Claims (3)

  A defrosting water evaporation device is arranged at the lower part of the refrigerator body, a drainage path for leading the evaporator and the defrosting water of the evaporator to a position above the defrosting water evaporation device, and a drainage for guiding the defrosting water to the outside of the refrigerator The defrosting water evaporator is provided with an evaporating dish for receiving the defrosting water and a sealing plate for sealing the upper surface of the evaporating dish, and provided with openings on both sides of the sealing plate. An air passage is formed in the air passage, and a blowing means for forcing convection of air through the air passage is disposed in one of the openings, and the sealing plate is disposed between the air outlet and a discharge port that is an opening on the opposite side. A partition plate for partitioning the space above the defrosting water evaporation device from above is provided, and a drain port as an opening is provided at the center of the sealing plate, and the drain pipe is disposed above the drain port. A refrigerator characterized by that.   2. The refrigerator according to claim 1, wherein the drainage port has a shape having an inclined portion toward a lower part of the sealing plate.   2. The refrigerator according to claim 1, wherein the drain port is configured by dropping a part of the sealing plate toward the discharge port side and configured in a stepped portion with a flat portion of the sealing plate. .