JP2014059100A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator which improves the cooling capacity and the evaporation capacity of defrosting water.SOLUTION: A refrigerator includes: a heat insulation box 3 which forms storage rooms 4, 5; a machine room 6 which is disposed below the heat insulation box 3; a cooler 35 which is disposed in a low temperature part of a refrigeration cycle and generates cooling air; a condenser 39 which is disposed in a high temperature part of the refrigeration cycle and is installed in the machine room 6; and an evaporation dish 16 which is disposed in the machine room 6 and recovers defrosting water of the cooler 35. The defrosting water of the cooler 35 is guided onto the condenser 39, travels along the condenser 39, and is recovered into the evaporation dish 16.

Description

  The present invention relates to a refrigerator provided with an evaporating dish for collecting defrosted water in a machine room.

  A conventional refrigerator is disclosed in Patent Document 1. This refrigerator includes a main body part in which a plurality of storage chambers are formed by a heat insulating box filled with a heat insulating material. The front of each storage room is opened and closed by a heat insulating door.

  A cool air passage through which cool air flows is provided behind the storage chamber, and a cooler that forms a low temperature part of the refrigeration cycle is disposed in the cool air passage. The cool air generated by heat exchange with the cooler is sent to the storage room, and the storage room is cooled.

  A machine room disposed below the heat insulating box is provided in the lower rear portion of the main body. A compressor, a condenser, and an evaporating dish are provided in the machine room. The compressor is arranged on the left side when viewed from the back, and operates the refrigeration cycle by circulating the refrigerant.

  The condenser is installed on the right side when viewed from the back, and is disposed in the high temperature part of the refrigeration cycle. The evaporating dish is arranged below the condenser and collects defrost water from the cooler. The defrosted water in the evaporating dish is heated by the heat generated by the compressor and the condenser in the machine room and collected in the atmosphere.

JP 2009-79778 A

  In recent years, condensers have been miniaturized by changing from the front of a heat insulating box, including the reduction of heat penetration into the storage chamber, from the viewpoint of increasing the effective internal volume, which tends to increase the internal volume with respect to the outer shape, and saving energy.

  In addition, in the joint cooling type refrigerator that cools each storage chamber by distributing and circulating the cold air created by the cooler to each storage chamber by a blower, the frost is concentrated on the cooler as an advantage. Since the defrosting can be done automatically by melting, the joint cooling method is currently the mainstream. At this time, the frost melted from the cooler becomes defrosted water, and is guided to the evaporating dish through the defrosted water receiver and the drainage path provided at the lower part of the cooler.

  At this time, since the temperature of the cooler is increased by defrosting, the load increases after defrosting and requires a large cooling capacity. However, according to the above conventional refrigerator, there is a problem that the heat radiation amount of the condenser becomes insufficient when the load increases after defrosting, and the cooling capacity decreases. Moreover, since a condenser, a blower, etc. are arrange | positioned in the machine room of the limited space, the installation space of an evaporating dish will also be limited. For this reason, it is indispensable to improve the evaporation capacity of the defrosting water in the evaporating dish.

  An object of this invention is to provide the refrigerator which can improve a cooling capability and the evaporation capability of defrost water.

  To achieve the above object, the refrigerator of the present invention generates cold air by arranging it in a heat insulation box forming a storage room, a machine room arranged below the heat insulation box, and a low temperature part of a refrigeration cycle. A cooler, a condenser disposed in the high temperature part of the refrigeration cycle and installed in the machine room, and an evaporating dish disposed in the machine room and collecting defrost water of the cooler, The defrosted water of the cooler is guided onto the condenser and is collected in the evaporating dish through the condenser.

  In the refrigerator having the above-described configuration, the condenser is formed by fixing fins to a refrigerant pipe, and the fins are arranged horizontally.

  Moreover, the present invention is characterized in that in the refrigerator configured as described above, a blower fan is provided above the evaporating dish in the machine room.

  According to the present invention, the defrost water of the cooler is guided onto the condenser and is collected in the evaporating dish through the condenser, so that the condenser can be dissipated by the latent heat of the defrost water. Thereby, the thermal radiation amount of a condenser can be enlarged and the cooling capability of a refrigerator and the evaporation capability of defrost water can be improved.

Side surface sectional drawing which shows the refrigerator of embodiment of this invention The cycle figure which shows the refrigerating cycle of the refrigerator of embodiment of this invention The perspective view which shows the machine room of the refrigerator of embodiment of this invention

(First embodiment)
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side sectional view showing a refrigerator 1 according to an embodiment. The refrigerator 1 includes a main body 2 having a heat insulating box 3 filled with a heat insulating material. A refrigeration room 4 is provided at the upper part of the main body 2, and a freezing room 5 is provided below the refrigeration room 4.

  The front surfaces of the refrigerator compartment 4 and the freezer compartment 5 are opened and closed by heat insulating doors 4a and 5a, respectively. A machine room 6 disposed below the heat insulating box 3 is provided in the lower rear portion of the main body 2. A compressor 31 for operating the refrigeration cycle is disposed in the machine room 6.

  A cool air passage 7 through which cool air flows is provided behind the freezer compartment 5. The cool air passage 7 has a discharge port 7 a and a return port 7 b that face the freezer compartment 5. The cool air passage 7 is provided with a cooler 35 serving as a low temperature part of the refrigeration cycle.

  A cool air blower fan 9 is disposed above the cooler 35, and a defrost heater 37 that defrosts the cooler 35 is disposed below the cooler 35. A drain pipe 38 is provided below the defrost heater 37. The drain pipe 38 communicates with the machine room 6, and the drain pipe 38 guides defrost water to the evaporating dish 16 (see FIG. 3) disposed in the machine room 6.

  A cold air passage 8 communicating with the cold air passage 7 via a damper (not shown) is provided behind the refrigerator compartment 4. A discharge port 8 a facing the inside of the refrigerator compartment 4 is opened in the cold air passage 8. In addition, a communication path (not shown) is provided that allows the refrigerator compartment 4 to communicate with the upstream side of the cooler 35 of the cool air path 7.

  FIG. 2 is a cycle diagram showing the refrigeration cycle of the refrigerator 1. The refrigeration cycle is operated by circulating the refrigerant in the direction of arrow A in the refrigerant pipe 36 by driving the compressor 31. A first condenser 39 and a second condenser 40 are sequentially connected to the refrigerant outflow side of the compressor 31. As will be described later, the first condenser 39 is disposed in the machine room 6, and the second condenser 40 is disposed on the side surface and the back surface of the heat insulating box 3.

  A dryer 33 is disposed on the refrigerant outflow side of the second condenser 40, and the refrigerant outflow side of the dryer 33 branches into a first path 44 and a second path 45 via a valve 34. A heat pipe 41 and a capillary tube 42 are arranged in order on the first path 44, and a capillary tube 43 is arranged on the second path 45.

  The heat pipe 41 is provided on the peripheral surface of the opening 4 b of the refrigerator compartment 4 and the peripheral surface of the opening 5 b of the freezer compartment 5, and prevents the occurrence of condensation that occurs on the peripheral surface by the heat pipe 41. A cooler 35 is connected to the subsequent stage of the confluence of the first and second paths 44 and 45, and the refrigerant outflow side of the cooler 35 is connected to the compressor 31.

  The high-temperature and high-pressure refrigerant compressed by the compressor 31 is condensed while dissipating heat in the first condenser 39 by forced convection by a blower fan 32 (see FIG. 3) described later. The refrigerant flowing out of the first condenser 39 is condensed while radiating heat in the second condenser 40 by natural convection.

  Moisture is removed from the high-temperature refrigerant flowing out of the second condenser 40 by the dryer 33. Thereafter, the refrigerant flows through the first path 44 or the second path 45 by switching the valve 34. The refrigerant flowing through the first path 44 passes through the heat pipe 41 and prevents condensation around the openings 4b and 5b. The refrigerant flowing out of the heat pipe 41 expands in the capillary tube 42 and becomes a low pressure. Further, the refrigerant flowing through the second path 45 expands in the capillary tube 43 and becomes a low pressure.

  The low-pressure refrigerant that has flowed out of the capillary tube 42 or the capillary tube 43 flows into the cooler 35 and evaporates while absorbing heat from the air flowing through the cold air passage 7 to become a low-temperature gas refrigerant. Then, the low-temperature gas refrigerant returns to the compressor 31, and the refrigerant circulates to operate the refrigeration cycle.

  Cold air generated by heat exchange between the air flowing through the cold air passage 7 and the cooler 35 by driving the compressor 31 and the cold air blowing fan 9 is discharged from the discharge port 7 a to the freezer compartment 5. The cold air discharged from the discharge port 7a flows through the freezer compartment 5 and returns to the cooler 35 via the return port 7b. Thereby, cooling in the freezer compartment 5 is performed.

  When a damper (not shown) is opened, cold air flows from the cold air passage 7 into the cold air passage 8, and is discharged from the discharge port 8a to the refrigerator compartment 4. The cold air discharged from the discharge port 8a flows through the refrigerator compartment 4 and returns to the cooler 35 through a communication path (not shown). Thereby, the inside of the refrigerator compartment 4 is cooled.

  FIG. 3 shows a perspective view of the machine room 6 as seen from the back. A grill 10 having a plurality of ventilation holes (not shown) is provided on both side walls 6 a of the machine room 6. In the machine room 6, a compressor 31, a first condenser 39, a blower fan 32, a valve 34 and a dryer 33 are arranged in order from the left when viewed from the back.

  The evaporating dish 16 is disposed below the first condenser 39 and the blower fan 32. The evaporating dish 16 has a capacity of about 3 L and is fixed to the bottom surface of the machine room 6. The first condenser 39 includes a water cooling unit 39a and an air cooling unit 39b. The water cooling part 39 a is a part where a refrigerant pipe 36 extending meandering from the compressor 31 is disposed in contact with the inner bottom surface 16 a of the evaporating dish 16.

  The air cooling part 39b is arranged downstream of the water cooling part 39a and facing the blower fan 32. The air cooling part 39 b is formed by fixing a large number of fins 39 c to the refrigerant pipe 36. The fins 39c each having a substantially rectangular shape are horizontally arranged. The lower end 39d of the air cooling unit 39b is disposed in contact with the inner bottom surface 16a of the evaporating dish 16. The fin 39c at the lower end is close to the inner bottom surface 16a, and the fin 39c at the upper end is close to the lower end of the drain pipe 38 (see FIG. 1).

  The defrosting operation of the cooler 35 is performed by driving the defrost heater 37, and the cooler 35 is heated. The defrost water generated by the defrosting operation is guided onto the fins 39c of the air cooling unit 39b through the drain pipe 38, and is collected in the evaporating dish 16 through the fins 39c. Since the lower end 39d of the air cooling unit 39b and the water cooling unit 39a are in contact with the inner bottom surface 16a of the evaporating dish 16, they are immersed in defrosted water collected in the evaporating dish 16. Moreover, the fin 39c may also be immersed with defrost water.

  When the blower fan 32 is driven, outside air is sucked into the machine room 6 through the vent hole of the grille 26 disposed on one side of the machine room 6. The air flowing into the machine room 6 cools the air cooling unit 39b and the compressor 31 of the first condenser 39 to dissipate heat. The air that has cooled the first condenser 39 and the compressor 31 is exhausted through the vent hole of the other grille 26.

  The defrosted water in the evaporating dish 16 is evaporated by the heat in the machine chamber 6 by the heat source of the compressor 31 and the first condenser 39 and collected in the atmosphere. At this time, the water cooling unit 39a and the air cooling unit 39b of the first condenser 39 dissipate heat by latent heat due to evaporation of the defrost water. Thereby, the heat radiation amount of the first condenser 39 can be increased.

  Further, since the blower fan 32 is in the vicinity of the upper portion of the evaporating dish 16, evaporation of defrost water is promoted by the flow of air generated by driving the blower fan 32.

  According to the present embodiment, the defrost water from the cooler 35 is guided onto the first condenser 39 (condenser) and is collected from the upper portion of the first condenser 39 to the evaporating dish 16. The first condenser 39 can be dissipated by the latent heat. Thereby, the refrigerator 1 which can improve a cooling capability and the evaporation capability of defrost water can be provided. In addition, as long as defrost water exists other than the high load state after defrosting, the heat radiation efficiency can be improved.

  Further, since the first condenser 39 is formed by fixing the fins 39c to the refrigerant pipe, and the fins 39c are horizontally arranged, the area where the defrost water is guided is increased and the defrost water is reliably guided to the fins 39c. Can do.

  Further, since the blower fan 32 is provided on the upper mold of the evaporating dish 16 in the machine room 6, the first condenser 39 (condenser) and the compressor 31 can be cooled, and the flow of air generated by driving the blower fan 32. This promotes evaporation of defrost water. Thereby, the evaporating dish 16 can be reduced in size.

  According to this invention, it can utilize for the refrigerator provided with the evaporating dish which collects defrost water in a machine room.

DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Main body part 3 Heat insulation box 4 Refrigeration room 5 Freezing room 6 Machine room 6a Side wall 6b Vent hole 7, 8 Cold air passage 9 Cold air ventilation fan 16 Evaporating dish 16a Inner bottom surface 26 Grill 31 Compressor 32 Blower fan 33 Dryer 34 Valve 35 cooler 36 refrigerant pipe 37 defrost heater 38 drain pipe 39 first condenser 39a water cooling part 39b air cooling part 39c fin 39d lower end 40 second condenser 41 heat pipes 42, 43 capillary tube 44 first path 45 second path

Claims (3)

A heat insulating box forming a storage room;
A machine room arranged below the heat insulation box,
A cooler that generates cold air in the low temperature part of the refrigeration cycle;
A condenser placed in the high temperature part of the refrigeration cycle and installed in the machine room;
An evaporating dish arranged in the machine room and collecting defrost water of the cooler;
The defrost water of the said cooler is led on the said condenser, goes through the said condenser, and is collect | recovered by the said evaporating dish, The refrigerator characterized by the above-mentioned.   The refrigerator according to claim 1, wherein the condenser is formed by fixing fins to a refrigerant pipe, and the fins are arranged horizontally.   The refrigerator according to claim 1 or 2, wherein a blower fan is provided above the evaporating dish in the machine room.

Images