JP2020169748A - refrigerator - Google Patents

Abstract

To provide a refrigerator that can efficiently evaporate defrosting water from a chiller.SOLUTION: A refrigerator includes: a refrigerator body 2 including storage rooms 6, 7 therein; a machine room 20 formed in the refrigerator body 2; a chiller 12 for generating cool air to be supplied to the storage rooms 6, 7; a refrigeration cycle 30 including a compressor 31 and a condenser 33 installed to the machine room 20; an evaporation pan 22 stored in the machine room 20 and storing defrosting water generated at the chiller 12; a machine room fan 23 for sending air to the compressor 31 to cool the compressor 31; and an evaporation pan fan 24 for sending air to the water that is stored in the evaporation pan 22.SELECTED DRAWING: Figure 4

Description

An embodiment of the present invention relates to a refrigerator.

In a refrigerator, water vapor in the refrigerator freezes and frost adheres to the outer peripheral surface of the cooler that constitutes the refrigeration cycle. However, if frost adheres to the cooler, the cooling capacity of the cooler decreases, so the cooler The frost adhering to the frost is appropriately melted and defrosted by a fan or a defrost heater.

Then, the defrosted water generated by the defrosting of the cooler is guided to the evaporating dish in the machine room where the compressor is located, and the heat generated during the compression operation of the compressor and the air from the machine room fan for cooling the compressor are used. The defrost water is evaporated.

However, in an atmosphere where the outside air temperature is low, the drive rate of the machine room fan also decreases as the operation rate of the refrigeration cycle decreases. Even in that case, it is necessary to evaporate the defrost water, but if the drive rate of the machine room fan becomes low, the defrost water cannot be sufficiently evaporated, and the evaporation capacity may decrease. On the other hand, it is conceivable to improve the evaporation capacity or increase the amount of water stored by enlarging the evaporating dish, but there is a problem that the volume of the machine room that cannot be used as a storage room increases.

JP-A-2015-117905

The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide a refrigerator capable of efficiently evaporating defrost water from a cooler.

The refrigerator of one embodiment includes a refrigerator main body having a storage chamber inside, a machine room formed in the refrigerator main body, a cooler for generating cold air to be supplied to the storage room, and a compressor provided in the machine room. A refrigerating cycle having a machine and a condenser, an evaporative tray that is stored in the machine room and stores defrosted water generated by the cooler, a machine room fan that blows air to the compressor to cool the compressor, and the like. It is provided with an evaporative plate fan that blows air to the water stored in the evaporative plate.

A vertical sectional view showing a schematic configuration of a refrigerator according to a first embodiment of the present invention. Schematic diagram showing a refrigeration cycle device in the refrigerator of FIG. Block diagram showing the electrical configuration of the refrigerator of FIG. A view of the machine room of the refrigerator shown in FIG. 1 with the rear grill removed from the rear. The figure which shows typically the AA cross section of FIG. Sectional drawing of the machine room of the refrigerator of 2nd Embodiment of this invention

(First Embodiment)
Hereinafter, the refrigerator 1 of the first embodiment of the present invention will be described with reference to the drawings.

(1) Structure of Refrigerator 1 The refrigerator main body 2 of the refrigerator 1 is composed of an outer box 2a, an inner box 2b, and a heat insulating space 2c formed between them and provided with a heat insulating material. The refrigerator body 2 is provided with a refrigerating room 3, a vegetable room 4, a first freezing room 6, and a second freezing room 7 from the top, and an ice making room (not shown) is arranged next to the first freezing room 6. .. A heat insulating partition wall 8 is provided in the horizontal direction between the refrigerating space composed of the refrigerating room 3 and the vegetable room 4, the ice making room, the first freezing room 6, and the second freezing room 7. There is.

A refrigerating cooler 10 for cooling the refrigerating space including the refrigerating chamber 3 and the vegetable compartment 4 is provided on the back surface of the refrigerating chamber 3 and the vegetable compartment 4. A refrigerating fan 11 is provided above the refrigerating cooler 10 to blow the cold air generated by the refrigerating cooler 10 into the refrigerating space.

A refrigerating cooler 12 for cooling a refrigerating space including an ice making chamber, a first freezing chamber 6, and a second freezing chamber 7 is provided on the upper back surface of the second freezing chamber 7. A freezing fan 13 for blowing the cold air generated by the freezing cooler 12 into the freezing space is provided above the freezing cooler 12, and a drain gutter 18 is provided below the freezing cooler 12.

Reference numeral 19 is a defrost heater provided in the vicinity of the refrigerating cooler 12, which heats the refrigerating cooler 12 during the defrosting operation to melt the frost adhering to the refrigerating cooler 12. The water (defrosted water) generated by melting the frost is received by the drainage gutter 18 and discharged to the evaporating dish 22 provided in the machine room 20 via the pipe 21.

A refrigerating temperature sensor 14 for detecting the internal temperature of the refrigerating chamber 3 is provided on the back surface of the refrigerating chamber 3, and a freezing temperature for detecting the internal temperature of the second freezing chamber 7 is provided on the back surface of the second freezing chamber 7. A sensor 15 is provided.

The front openings of the refrigerating room 3, the vegetable room 4, the ice making room, the first freezing room 6 and the second freezing room 7 are closed by a door. The door 3a that closes the front opening of the refrigerator compartment 3 has an outside air temperature sensor 16 that detects the temperature of the installation atmosphere of the refrigerator 1 (outside temperature) and an outside humidity sensor 17 that detects the humidity of the installation atmosphere of the refrigerator 1. And are provided.

A machine room 20 is arranged at the rear of the bottom surface of the refrigerator body 2, that is, behind the second freezer room 7. In the machine room 20, the compressor 31 and the compressor 33, which form a part of the refrigeration cycle 30, and the evaporating dish 22 and the compressor 31 that receive the defrosted water generated from the refrigerating cooler 12 via the pipe 21 are blown. A machine room fan 23 for cooling the sushi and an evaporating dish fan 24 for blowing air to the water stored in the evaporating dish 22 are arranged. The machine room 20 will be described in detail later.

A control unit 25 on which a microcomputer or the like for controlling the refrigerator 1 is mounted is provided on the outside of the refrigerator body 2, for example, on the rear surface of the upper surface of the ceiling wall of the refrigerator body 2.

(2) Configuration of Refrigerator Cycle 30 Next, the configuration of the refrigerator 1 of the refrigerator 1 of this embodiment will be described with reference to FIG.

In the refrigeration cycle 30, the evaporation pipe 32, the condenser 33, the heat radiation pipe 34, the dew-proof pipe 35, the dryer 36, and the switching valve 37 are arranged in this order from the refrigerant outlet 31b of the compressor 31 that discharges the high-temperature and high-pressure gaseous refrigerant. The entrance side of is connected.

A refrigerating capillary tube 38 as a depressurizing means, a refrigerating cooler 10, and a refrigerating suction pipe 39 are sequentially connected to one outlet of the switching valve 37 by piping. A freezing capillary tube 40 as a depressurizing means, a freezing cooler 12, a freezing suction pipe 41, and a check valve 42 are connected in order to the other outlet of the switching valve 37 by piping. The outlet side of the check valve 42 and the outlet side of the refrigerating suction pipe 39 are connected to one connecting pipe 44 via a joint 43, and the outlet side of the connecting pipe 44 is connected to the refrigerant inlet 31a of the compressor 31. Has been done.

In such a refrigeration cycle 30, after the refrigerant sealed in the cycle is compressed by the compressor 31 and changed into a high-temperature and high-pressure gaseous refrigerant, the evaporation pipe 32, the condenser 33, the heat dissipation pipe 34, and dew-proofing are performed. Heat is dissipated while flowing through the pipe 35. The refrigerant flowing through the dew-proof pipe 35 is guided to the switching valve 37 after passing through the dryer 36 provided in the machine room 20, and is guided to the refrigerating capillary tube 38 and the refrigerating capillary tube 38 by the switching valve 37 based on the command of the control unit 25 of the refrigerator 1. It is switched to one of the frozen capillary tubes 40 and supplied, and the pressure is reduced so that it can be easily vaporized.

The refrigerant that has been decompressed and liquefied by passing through the refrigerating capillary tube 38 and the refrigerating capillary tube 40 is vaporized by the refrigerating cooler 10 and the refrigerating cooler 12, and by removing heat from the surroundings, the refrigerating cooler 10 and the refrigerating cooling The temperature of the vessel 12 is lowered to generate cold air to cool the refrigerating space and the storage space.

The gas refrigerant that has passed through the refrigerating cooler 10 is sucked into the compressor 31 again through the refrigerating suction pipe 39 and the connecting pipe 44, and the gas refrigerant that has passed through the refrigerating cooler 12 is sucked into the refrigerating suction pipe 41 and the check valve 42. After merging with the refrigerant that has passed through the refrigerating cooler 10 at the joint 43, the refrigerant is sucked into the compressor 31 again through the connecting pipe 44, and a series of cycles is repeated.

(3) Electrical Configuration of Refrigerator 1 As shown in FIG. 3, the control unit 25 provided in the upper part of the refrigerator body 2 has a refrigerating fan 11, a refrigerating fan 13, a compressor 31, a switching valve 37, and a refrigerating temperature sensor. 14. Electrical components provided inside or outside the refrigerator body 2, such as the refrigerating temperature sensor 15, the outside temperature sensor 16, and the outside humidity sensor 17, are electrically connected. Then, when a signal input from various sensors, a signal input from the operation display unit by the operation of the user, or the like is input, the control unit 25 is a refrigerating fan based on a control program stored in the memory in advance. 11. By controlling the operation of the refrigerating fan 13, the compressor 31, and the switching valve 37, the compressor 31, the refrigerating fan 11, and the refrigerating fan 13 can be operated, and the refrigerating cooler 10 and the refrigerating cooler 12 can be operated by the switching valve 37. Controls the overall operation of the refrigerator 1 such as switching the refrigerant.

(4) Structure of Machine Room 20 As shown in FIGS. 1, 4 and 5, the machine room 20 is a space formed under the step portion 9 of the refrigerator main body 2, and the lower surface, left and right sides of the space. The side surfaces and the back surface are closed by the bottom plate 50, the left and right lower rear portions 12aL, 12aR, and the back surface grill 52 of the outer box 12a.

Inside the machine room 20, a machine room fan 23 is provided closer to one side in the width direction (for example, the right side when viewed from the back). The machine room fan 23 includes an axial-flow fan arranged so as to divide the machine room 20 to the left and right, and blows air in the machine room 20 in the width direction. In the first space S1 facing the suction port 23a of the machine room fan 23, a condenser 33, a dryer 36, a switching valve 37, and an evaporative dish fan 24 are provided, and a second space facing the air outlet 23b of the machine room fan 23 is provided. A compressor 31 is provided in the space S2.

In the first space S1, the outside air taken in from the air supply port 46 provided in the lower rear portion 12aR of the outer box 12a and the air supply port 47 provided in the rear grill 52 is indicated by an arrow in FIG. A flow path (duct) flowing toward the suction port 23a of the machine room fan 23 is formed in the machine room. The air supply port 46 provided in the outer box 12a is provided at a position facing the condenser 33 and facing the rotating shaft 23c of the machine room fan 23.

The condenser 33 provided in the first space S1 is provided closer to the suction port 23a of the machine room fan 23 from the center in the width direction of the first space S1. The condenser 33 is a fin tube in which a plurality of plate-shaped heat radiation fins are attached in parallel to each other on an aluminum refrigerant tube bent a plurality of times, and the overall shape is a rectangular parallelepiped.

In the first space S1, a refrigerating suction pipe 39 connected to the outlet side of the refrigerating cooler 10 and a freezing suction pipe 41 connected to the outlet side of the refrigerating cooler 12 project from the step 9 of the refrigerator body 2. ing. The refrigerated suction pipe 39 is connected to the joint 43, is connected to the joint 43 via the check valve 42, and joins the frozen suction pipe 41. A connecting pipe 44 is connected to the outlet of the joint 43, and the outlet is connected to the refrigerant inlet 31a of the compressor 31.

The bottom plate 50 of the machine room 20 is provided with an evaporating dish 22 so as to straddle the first space S1 and the second space S2. A lower opening of the pipe 21 is provided above the evaporating dish 22, and the evaporating dish 22 receives the defrost water of the refrigerating condenser 12 flowing out of the pipe 21.

The refrigerant outlet 31b of the compressor 31 provided in the second space S2 is connected to the evaporation pipe 32 provided on the machine room fan 23 side. The evaporation pipe 32 is bent in a plurality of planes along the bottom surface of the evaporating dish 22, and the flat portion is arranged inside the evaporating dish 22. Such an evaporation pipe 32 is immersed in the defrosting water accumulated in the evaporating dish 22 and exchanges heat with the evaporating dish 32 to cool the refrigerant flowing through the evaporation pipe 32 and to remove the defrosting water accumulated in the evaporating dish 22. Heat to promote evaporation. The outlet side of the evaporation pipe 32 is connected to the refrigerant inlet 33a of the condenser 33 provided above the evaporating dish 22. The refrigerant pipe connected to the refrigerant outlet 33b of the condenser 33 enters the heat insulating space 12c between the outer box 12a and the inner box 12b of the refrigerator body from the step 9 of the refrigerator body 2 and is provided in the heat insulating space 12c. It is connected to the heat radiation pipe 34 and the dew-proof pipe 35.

The outlet side of the dew-proof pipe 35 projects from the step 9 of the refrigerator body 2 to the machine room 20, and is sequentially connected to the dryer 36 and the switching valve 37. A refrigerated capillary tube 38 is connected to one refrigerant outlet of the switching valve 37, and a freezing capillary tube 40 is connected to the other refrigerant outlet of the switching valve 37.

Further, in the first space S1, as shown in FIGS. 4 and 5, an evaporating dish fan 24 is provided between the evaporating dish 22 and the lower rear portion 12aR of the outer box 12a. The evaporating dish fan 24 is composed of an axial flow fan having the same diameter as the machine room fan 23 or a smaller diameter than the machine room fan 23, and the control unit 25 can start / stop and control the rotation speed separately from the machine room fan 23. It has become.

The rotating shaft 24c of the evaporating dish fan 24 is located above the upper surface opening of the evaporating dish 22 and below the rotating shaft 23c of the machine room fan 23. The evaporating dish fan 24 is provided with the rotating shaft 24c of the evaporating dish fan 24 tilted downward on the outlet 24b side so that the evaporating dish fan 24b faces the upper surface opening of the evaporating dish 22.

In the evaporating dish fan 24, the air taken into the first space S1 from the air supply ports 46 and 47 is blown to the defrost water stored in the evaporating dish 22 by the blowing action, and the evaporation of the defrosted water is promoted. Let me.

The compressor 31 provided in the second space S2 has a substantially elliptical planar shape, and is fixed to the bottom plate 50 of the machine room 20 via a rubber cushion (not shown). The air in the first space S1 blown out from the air outlet 23b of the machine room fan 23 cools the compressor 31 as shown by an arrow in FIG. 5, and the exhaust port 48 provided in the lower rear portion 12aL of the outer box 12a and the like. , Flows toward the exhaust port 49 provided on the rear grill 52. The second space S2 forms a flow path through which air flows from the outlet 23b of the machine room fan 23 toward the exhaust ports 48 and 49.

(5) Operation of Refrigerator 1 In the refrigerator 1 having such a configuration, the control unit 25 compresses the refrigerating fan 11, the refrigerating fan 13, and the refrigerating fan 13 based on the internal temperature detected by the refrigerating temperature sensor 14 and the refrigerating temperature sensor 15. By controlling the machine 31 and the switching valve 37, the refrigerating cooling operation and the refrigerating cooling operation are switched and executed alternately, and when a predetermined defrosting start condition is satisfied, the defrosting operation is performed and the refrigerating cooler 12 is attached. Melt and remove the frost.

(5-1) Refrigerating / Cooling Operation When the refrigerating / cooling start condition is satisfied, the control unit 25 opens the outlet of the switching valve 37 on the refrigerating refrigerant flow path side while driving the compressor 31 at a predetermined frequency to provide the refrigerating / cooling device 10. The refrigerant is allowed to flow, and the refrigerating fan 11 is further rotated to start the refrigerating / cooling operation. To give an example of the refrigerating / cooling start condition, for example, the detection temperature of the refrigerating temperature sensor 14 may be equal to or higher than the ON temperature (for example, 5 ° C.) set for the refrigerating space.

In the refrigerating cooling operation, cold air is generated by vaporizing the low-pressure and low-temperature refrigerants that have flowed into the refrigerating cooler 10. The generated cold air circulates in the refrigerating room 3 and the vegetable room 4 by the blowing action of the refrigerating fan 11, and cools the refrigerating room 3 and the vegetable room 4 so as to reach a predetermined refrigerating temperature range.

The cold air circulating in the refrigerating room 3 and the vegetable room 4 returns to the refrigerating cooler 10 from the suction port provided on the back surface of the vegetable room 4 through the return duct and is cooled, and then is cooled again in the refrigerating room 3 and the vegetable room 4. It is blown to 4.

Then, when the refrigerating / cooling end condition is satisfied during the execution of the refrigerating / cooling operation, the control unit 25 ends the refrigerating / cooling operation. To give an example of the refrigerating / cooling end condition, for example, the detection temperature of the refrigerating temperature sensor 14 may reach the OFF temperature (for example, 2 ° C.) set for the refrigerating space.

Then, when the refrigerating / cooling operation is completed, the control unit 25 drives the compressor 31 at a predetermined frequency, opens the outlet of the switching valve 37 on the freezing refrigerant flow path side, allows the refrigerant to flow through the freezing / cooling device 12, and further freezes the refrigerating fan. 13 is rotated to start the freezing and cooling operation.

(5-2) Freezing-cooling operation In the freezing-cooling operation, cold air is generated by vaporizing the low-pressure and low-temperature refrigerant that has flowed into the freezing cooler 12. The generated cold air circulates in the ice making chamber, the first freezing chamber 6 and the second freezing chamber 7 by the blowing action of the freezing fan 13, and the ice making chamber, the first freezing chamber 6 and The second freezing chamber 7 is cooled.

The cold air circulating in the ice making chamber, the first freezing chamber 6 and the second freezing chamber 7 was cooled by returning to the freezing cooler 12 through the return duct from the suction port provided on the back surface of the second freezing chamber 7. After that, the air is blown to the ice making chamber, the first freezing chamber 6 and the second freezing chamber 7 again.

Then, when the freezing / cooling end condition is satisfied during the execution of the freezing / cooling operation, the control unit 25 ends the freezing / cooling operation. To give an example of the freezing / cooling end condition, for example, the detection temperature of the freezing temperature sensor 15 may reach the OFF temperature (for example, -21 ° C.) set for the freezing space.

Then, when the refrigerating / cooling operation is completed, the control unit 25 starts the refrigerating / cooling operation.

(5-3) Defrosting operation In the refrigerator 1, the refrigerating cooling operation and the freezing cooling operation are switched and executed, and when a predetermined defrosting start condition is satisfied, the first defrosting operation and the second defrosting operation are executed. To do.

The first defrosting operation is an operation of humidifying the refrigerating space by removing the frost adhering to the refrigerating cooler 10 by melting and supplying the moisture of the melted frost to the refrigerating space. Specifically, the control unit 25 closes the outlet of the switching valve 37 on the refrigerating refrigerant flow path side or stops the compressor 31 to stop the supply of the refrigerant to the refrigerating cooler 10 while refrigerating. Drives the fan 11.

As a result of these controls, the air in the refrigerating space exchanges heat with the refrigerating cooler 10 to which frost is attached, and then is returned to the refrigerating chamber 3 and the vegetable compartment 4 again. As a result, the temperature of the refrigerating cooler 10 is raised to melt the frost adhering to the refrigerating cooler 10, and the moisture of the melted frost is vaporized and blown to the refrigerating chamber 3 and the vegetable compartment 4 to blow the refrigerating chamber 3. Humidify 3 and the vegetable compartment 4.

The second defrosting operation is an operation of removing the frost adhering to the refrigerating cooler 12 by melting. Specifically, the control unit 25 closes the outlet of the switching valve 37 on the refrigerating refrigerant flow path side or stops the compressor 31 to stop the supply of the refrigerant to the refrigerating cooler 12 while refrigerating. The fan 13 is stopped and the defrost heater 19 is energized. Under these controls, the refrigerating condenser 12 is heated by the heat generated by the defrosting heater 19, and the frost adhering to the refrigerating condenser 12 is melted. The defrosted water generated by melting the frost is received by the drainage gutter 18 and discharged to the evaporating dish 22 provided in the machine room 20 via the pipe 21.

(5-4) Control of Machine Room Fan 23 In the refrigerator 1, when the refrigerating cooling operation or the refrigerating cooling operation is started, the compressor 31 arranged in the machine room 20 is activated to activate the evaporation pipe 32, the condenser 33, and the heat radiation pipe. High temperature refrigerant flows through 34 and the dew-proof pipe 35.

When the compressor 31 is activated, the temperature inside the machine room 20 rises due to heat generated by the operation of the compressor 31 and heat dissipation from the evaporation pipe 32 and the condenser 33 arranged in the machine room 20. Therefore, when the compressor 31 is activated, the control unit 25 activates the machine room fan 23 to cool the inside of the machine room 20.

That is, as shown in FIG. 5, external air is taken into the first space S1 from the air supply ports 46 and 47 by the blowing action of the machine room fan 23 to cool the condenser 33, and then the machine room fan 23 It is sucked into the suction port 23a and discharged from the air outlet 23b to the second space S2. The air discharged to the second space S2 flows through the second space S2 while cooling the compressor 31, and passes through the exhaust port 48 provided in the outer box 12a and the exhaust port 49 provided in the rear grill 52. Is exhausted to the outside.

Further, the control unit 25 reduces or stops the rotation speed of the machine room fan 23 when the detection temperature of the outside air temperature sensor 16 is a predetermined temperature or less (for example, 20 ° C. or less) while the compressor 31 is being driven. That is, when the detection temperature of the outside air temperature sensor 16 is higher than the predetermined temperature while the compressor 31 is being driven, the control unit 25 rotates the machine room fan 23 at the fifth rotation speed N5 to be equal to or lower than the predetermined temperature of the outside air temperature sensor 16. In the case of, the machine room fan 23 is rotated at a sixth rotation speed N6 smaller than the fifth rotation speed N5, or the machine room fan 23 is stopped. By such control, it is possible to prevent a cooling failure of the refrigerator 1 due to excessive cooling of the compressor 31, the evaporation pipe 32 and the condenser 33.

(5-5) Control of Evaporating Dish Fan 24 The control unit 25 activates the machine room fan 23 and the evaporating dish fan 24 when the compressor 31 operates in order to promote the evaporation of the defrosted water accumulated in the evaporating dish 22. To start. As a result, a part of the outside air taken into the first space S1 of the machine room 20 from the air supply ports 46 and 47 is sucked into the suction port 24a of the evaporating dish fan 24, and from the outlet 24b to the evaporating dish 22. It is sprayed toward the stored defrost water to promote the evaporation of the defrost water stored in the evaporating dish 22.

The air blown from the evaporative plate fan 24 toward the defrost water of the evaporative plate 22 is sucked into the machine room fan 23 provided on the outlet 24b side of the evaporative plate fan 24 and then discharged to the second space S2. The compressor 31 is cooled.

(6) Effect In the refrigerator 1 of the present embodiment, the machine room fan 23 for cooling the compressor 31 and the evaporating dish fan 24 for blowing air to the water stored in the evaporating dish 22 are provided in the machine room 20. , The evaporating capacity of defrosted water can be improved. As a result, the volume of the evaporating dish 22 which requires a relatively large space in the machine room 20 can be suppressed, the volume of the machine room 20 which cannot be utilized as a storage space can be suppressed, and the storage space inside the refrigerator main body 2 can be expanded. ..

Further, the evaporating dish fan 24 that blows air to the defrosted water of the evaporating dish fan 24 is provided separately from the machine room fan 23 that cools the compressor 31, and the rotation speed is controlled separately from the machine room fan 23. Therefore, the evaporation capacity of the defrosted water of the evaporating dish 22 can be controlled according to the installation environment of the refrigerator 1.

Further, since the machine room fan 23 and the evaporating dish fan 24 are provided in the same machine room 20, the amount of air flowing inside the machine room 20 increases, and the compressor 31 and the condenser stored in the machine room 20 are condensed. The cooling capacity of the vessel 33 and the like can be improved.

In the present embodiment, since the rotating shaft 24c of the evaporating dish fan 24 is arranged below the rotating shaft 23c of the machine room fan 23, the evaporating dish fan 24 provided in the machine room 20 sucks and exhausts the machine room fan 23. It does not hinder the cooling capacity of the compressor 31 and the condenser 33.

Further, in the present embodiment, since the evaporating dish fan 24 is arranged in the first space S1 on the suction port 23a side of the machine room fan 23, it is located on the outlet 23b side of the machine room fan 23 where turbulence is likely to occur. The evaporating dish fan 24 is arranged so as not to interfere with the blowing of air to the compressor 31.

(Second Embodiment)
Next, the second embodiment of the present invention will be described mainly based on FIG. 6 with a focus on parts different from the first embodiment. Those having the same configuration as that of the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

In the first embodiment described above, the case where the evaporating dish 22 is provided on the bottom plate 50 of the machine room 20 has been described. In this embodiment, an evaporating dish 122 is provided above the compressor 31 in the machine room 20. The evaporating dish 122 is arranged so that the upper surface opening is spaced downward from the ceiling surface of the machine room 20. On the ceiling surface of the machine room 20, a wind direction plate 126 that guides the air blown from the evaporating dish fan 124 into the evaporating dish 122 is provided at a position facing the upper surface opening of the evaporating dish 122.

In the second space S2 facing the air outlet 23b of the machine room fan 23, an evaporating dish fan 124 is provided between the evaporating dish 22 and the machine room fan 23. The evaporating dish fan 124 is composed of an axial flow fan having the same diameter as the machine room fan 23 or a smaller diameter than the machine room fan 23, and the control unit 25 can start / stop and control the rotation speed separately from the machine room fan 23. It has become.

The rotating shaft 124c of the evaporating dish fan 124 is located above the rotating shaft 23c of the machine room fan 23. The evaporating dish fan 124 tilts the rotation shaft 124c of the evaporating dish fan 124 upward on the outlet 124b side so that the outlet 124b faces the wind direction plate 126 provided on the ceiling surface of the machine room 20. It is provided in.

The evaporating dish fan 124 blows the air in the machine room 20 from the upper surface opening of the evaporating dish 122 to the defrost water by its blowing action to promote the evaporation of the defrost water.

In the present embodiment as well, as in the first embodiment described above, the volume of the evaporation pan 22 can be suppressed, the volume of the machine room 20 that cannot be used as the storage space can be suppressed, and the storage space inside the refrigerator body 2 can be expanded. Further, in the present embodiment, since the rotating shaft 124c of the evaporating plate fan 124 is arranged above the rotating shaft 23c of the machine chamber fan 23, the evaporating plate fan 124 is arranged in the machine chamber 20. However, the evaporative tray fan 124 does not hinder the intake and exhaust of the machine room fan 23 and reduce the cooling capacity of the compressor 31, the condenser 33, and the like.

(Change example)
In the first and second embodiments described above, the case where the evaporating dish fan 24 is rotated together with the machine room fan 23 during the refrigerating cooling operation or the refrigerating cooling operation has been described, but the evaporating dish fan 24 is rotated at an arbitrary timing. Therefore, the evaporation of the defrosted water in the evaporating dish 22 can be promoted.

For example, when the detection temperature of the outside air temperature sensor 16 is a predetermined temperature or less (for example, 20 ° C. or less), the control unit 25 drives the evaporating dish fan 24 even when the machine room fan 23 is stopped, and the evaporating dish 22 You may blow air toward the defrosted water stored in the water.

By such control, even if the temperature outside the refrigerator is low and the defrosted water is difficult to vaporize, the driving time of the evaporating dish fan 24 can be lengthened to vaporize the defrosted water of the evaporating dish 22. ..

Further, when the detection temperature of the outside air temperature sensor 16 is equal to or lower than a predetermined temperature (for example, 20 ° C. or lower) and the humidity detected by the external humidity sensor 17 is equal to or higher than a predetermined value (for example, 70% or higher). , The control unit 25 may increase the rotation speed of the evaporating dish fan 24.

That is, when the detection temperature of the outside air temperature sensor 16 is equal to or lower than the predetermined temperature and the humidity detected by the outside humidity sensor 17 is less than the predetermined value, the control unit 25 rotates the evaporating dish fan 24 at the first rotation speed N1. When the humidity detected by the outside humidity sensor 17 is equal to or higher than a predetermined value, the evaporating dish fan 24 may be rotated at a second rotation speed N2 higher than the first rotation speed N1.

By such control, the evaporation capacity of the defrosted water by the evaporating dish fan 24 can be improved, the temperature outside the refrigerator is low, the humidity outside the refrigerator is high, and the defrosted water is hard to vaporize. However, the defrosted water in the evaporating dish 22 can be vaporized.

Further, the control unit 25 may control the evaporating dish fan 24 based on the execution time of the second defrosting operation (the energizing time of the defrosting heater 19).

Specifically, when the execution time of the second defrosting operation is a predetermined time or more (for example, one hour or more), the control unit 25 waits from the end of the second defrosting operation until the predetermined time T elapses. , At least one of the rotation speed of the evaporating dish fan 24 and the drive rate of the evaporating dish fan 24 (that is, the ratio of the time t during which the evaporating dish fan 24 is rotating within the predetermined time T (= t / T)). May be set longer than when the execution time of the second defrosting operation is less than a predetermined time.

By such control, when the execution time of the second defrosting operation is long and the amount of defrosted water accumulated in the evaporating dish 22 is large, the number of revolutions and the driving rate of the evaporating dish fan 24 are set large to improve the evaporation capacity. When the execution time of the second defrosting operation is short and the amount of defrosted water accumulated in the evaporating dish 22 is small, the rotation speed and drive rate of the evaporating dish fan 24 can be set small to reduce power consumption. .. That is, the evaporation capacity of the defrost water by the evaporating dish fan 24 can be changed according to the amount of the defrost water accumulated in the evaporating dish 22, and the defrost water overflows from the evaporating dish 22 due to the lack of the evaporation capacity. It is possible to suppress unnecessary operation of the evaporating dish fan 24 such that the evaporating dish fan 24 rotates in a state where the evaporating dish 22 does not have defrost water.

(Other changes)
Although the embodiments of the present invention have been described above, the above embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, as well as in the scope of the invention described in the claims and the equivalent scope thereof.

1 ... Refrigerator, 2 ... Refrigerator body, 3 ... Refrigerator room, 4 ... Vegetable room, 6 ... 1st freezer room, 7 ... 2nd vegetable room, 8 ... Insulation partition wall, 9 ... Steps, 10 ... Refrigerator cooler, 11 ... Refrigerator fan, 12 ... Refrigerator cooler, 13 ... Refrigerator fan, 16 ... Outside temperature sensor, 17 ... Outside humidity sensor, 18 ... Drainage gutter, 19 ... Defrost heater, 20 ... Machine room, 21 ... Pipe, 22 ... Evaporator, 23 ... Machine room fan, 24 ... Evaporator fan, 25 ... Control unit, 30 ... Refrigerator cycle, 31 ... Compressor, 33 ... Condenser

Claims (8)

The refrigerator body with a storage room inside and
The machine room formed in the refrigerator body and
A refrigeration cycle having a cooler for generating cold air supplied to the storage room and a compressor and a condenser provided in the machine room.
An evaporating dish that is stored in the machine room and stores the defrosted water generated by the cooler.
A machine room fan that blows air to the compressor to cool the compressor,
A refrigerator provided with an evaporating dish fan that blows air to the water stored in the evaporating dish. The evaporating dish is provided on the bottom surface of the machine room,
The refrigerator according to claim 1, wherein the rotating shaft of the evaporating dish fan is arranged below the rotating shaft of the machine room fan. The refrigerator according to claim 1 or 2, wherein the evaporating dish fan is arranged on the suction port side of the machine room fan. The evaporating dish is provided above the compressor
The refrigerator according to claim 1, wherein the rotating shaft of the evaporating dish fan is arranged above the rotating shaft of the machine room fan. The evaporating dish is provided above the compressor
The refrigerator according to claim 4, further comprising a wind direction plate that guides the air blown from the evaporating dish fan into the inside of the evaporating dish. Equipped with an outside air temperature sensor that detects the temperature of the installation atmosphere
The refrigerator according to any one of claims 1 to 5, wherein when the detection temperature of the outside air temperature sensor is equal to or lower than a predetermined temperature, the evaporating dish fan is rotated while the machine room fan is stopped. Equipped with an external humidity sensor that detects the humidity of the installation atmosphere
When the detected humidity of the external humidity sensor is less than a predetermined humidity, the evaporating dish fan is rotated at the first rotation speed while the machine room fan is stopped.
The refrigerator according to claim 6, wherein when the detected humidity of the external humidity sensor is equal to or higher than a predetermined humidity, the evaporating dish fan is rotated at a second rotation speed higher than the first rotation speed while the machine room fan is stopped. A defrosting operation is performed in which the cooler is heated by the heating means to melt the frost adhering to the cooler.
The refrigerator according to any one of claims 1 to 7, wherein the evaporating dish fan is controlled based on the execution time of the defrosting operation.

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