JP2020201006A - refrigerator - Google Patents

Abstract

To improve energy-saving effect by reducing heat flowing into a storage chamber through a dew-proofing pipe and thereby reducing power consumption required for cooling.SOLUTION: A refrigerator 10 switches between a refrigeration mode for cooling refrigeration storage chambers 30, 31 by flowing refrigerant to a refrigeration cooler 51, and a freezing mode for cooling freezing storage chambers 32, 33, 34 by flowing the refrigerant to a freezing cooler 53. In the refrigerator, dew-proofing pipes 601, 602 provided around a front surface opening part of at least one of the refrigeration storage chambers 30, 31 and the freezing storage chambers 32, 33, 34 include a first dew-proofing pipe 60 connected to at least one side of a first outlet 57a and a second outlet 57b of a three-way valve 57, so that the valve opening of the three-way valve 57 is controlled when supplying the refrigerant to the first dew-proofing pipe 60 from the three-way valve 57, and the temperature of the first dew-proofing pipe 60 is controlled.SELECTED DRAWING: Figure 3

Description

Embodiments of the present invention relate to refrigerators.

In the refrigerator, in order to prevent dew condensation due to the temperature difference between the outside air and the inside of the refrigerator, a dew-proof pipe is provided on the partition surface of the front opening of the refrigerator body to prevent the refrigerant that has become hot and compressed by the compressor during the refrigeration cycle. It may be introduced into the dew pipe.

In a refrigerator provided with such a dew-proof pipe, if the temperature of the refrigerant flowing in the dew-proof pipe, that is, the temperature of the dew-proof pipe is high, a large amount of the heat flows into the storage chamber, and the temperature in the storage chamber rises. Then, extra electric power is consumed to cool the raised storage chamber, which may hinder the energy saving effect.

Japanese Unexamined Patent Publication No. 2014-5943

Therefore, in a pipe that suppresses dew around the opening by using a pipe through which the refrigerant of the refrigeration cycle flows as a dew-proof pipe, the heat flowing from the dew-proof pipe into the storage chamber is reduced, thereby reducing the power consumption required for cooling. Provide a refrigerator that can be reduced and the energy saving effect can be improved.

The refrigerator of the present embodiment is provided on the outlet side of the refrigerator main body provided with a refrigerator storage chamber and a freezer storage chamber, a compressor, a condenser for receiving the refrigerant discharged from the compressor, and the outlet side of the condenser. A three-way valve having a flow rate throttle function, a refrigerating / depressurizing device and a refrigerating / cooling device connected to the first outlet side of the three-way valve, and a refrigerating / depressurizing device and the refrigerating / cooling device connected to the second outlet side of the three-way valve. A refrigerating decompressor and a refrigerating cooler provided in parallel with the cooler, and a part of a high-temperature side refrigerant flow path for flowing the refrigerant pumped from the compressor to the refrigerating cooler and the refrigerating cooler, and the refrigerating A refrigerating cycle having a storage chamber and a dew-proof pipe provided around at least one front opening of the refrigerating storage chamber and a control unit for controlling the refrigerating cycle are provided, and the control unit is refrigerated and cooled. In a refrigerator that is executed by switching between a refrigerating mode in which a refrigerant flows through a container to cool the refrigerating storage chamber and a refrigerating mode in which a refrigerant is passed through the refrigerating cooler to cool the refrigerating storage chamber, the dew-proof pipe is described as described above. It has a first dew-proof pipe connected to one side of the first outlet and the second outlet of the three-way valve, and the control unit supplies the refrigerant from the three-way valve to the first dew-proof pipe. The valve opening degree of the three-way valve is controlled to control the temperature of the first dew-proof pipe.

The vertical sectional view which shows the schematic structure of the refrigerator which concerns on 1st Embodiment. The perspective view which shows the schematic structure of the refrigerator main body of the refrigerator which concerns on 1st Embodiment. The figure which shows the schematic structure of the refrigerating cycle of the refrigerator which concerns on 1st Embodiment. The block diagram which shows the electric structure of the refrigerator which concerns on 1st Embodiment. The figure which shows the arrangement of the 1st dew-proof pipe in the state which the left-right side wall and the ceiling wall of the refrigerator body are expanded in the refrigerator which concerns on 1st Embodiment. The figure which shows the refrigerating cycle of the refrigerator which concerns on 2nd Embodiment. The figure which shows the arrangement of the 1st dew-proof pipe and the 2nd dew-proof pipe in the state which the left-right side wall and the ceiling wall of the refrigerator main body are expanded in the refrigerator which concerns on 2nd Embodiment. The figure which shows the refrigerating cycle of the refrigerator which concerns on the modification of 2nd Embodiment. The figure which shows the refrigerating cycle of the refrigerator which concerns on 3rd Embodiment. The figure which shows the arrangement of the 1st dew-proof pipe and the 3rd dew-proof pipe in the state which the left-right side wall and the ceiling wall of the refrigerator main body are expanded in the refrigerator which concerns on 3rd Embodiment.

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

(1) Configuration of Refrigerator 10 As shown in FIGS. 1 and 2, the refrigerator 10 of the present embodiment has a storage space formed inside a refrigerator main body 11 that opens to the front. The refrigerator body 11 is formed in a vertically long rectangular box shape having a left side wall 12, a right side wall 13, a ceiling wall 14, a bottom wall 15, and a rear wall 16. The refrigerator body 11 is formed with an opening 111 surrounded by a left side wall 12, a right side wall 13, a ceiling wall 14, and a bottom wall 15 on the front surface thereof.

As shown in FIG. 1, the refrigerator main body 11 is configured by providing a heat insulating member 19 between, for example, an outer box 17 and an inner box 18 made of synthetic resin. In this example, the outer box 17 is formed of a U-shaped bent steel plate that opens downward and constitutes the outer surfaces of the left side wall 12, the right side wall 13, and the ceiling wall 14 of the refrigerator body 11, and the bottom wall 15 and the rear wall 16. The steel plates that make up the outer surface are assembled and pre-configured in a box shape.

The refrigerator main body 11 may be formed in a box shape by combining a plurality of divided walls. For example, the left side wall 12, the right side wall 13, the ceiling wall 14, the bottom wall 15, and the rear wall 16 may be individually configured and then combined to form a box. As the heat insulating member 19, for example, a filling type such as urethane foam, a preformed member such as a vacuum heat insulating panel, or a combination thereof is used.

A plurality of frame members are provided in the opening 111 formed on the front surface of the refrigerator main body 11. In the present embodiment, as shown in FIG. 2, the upper horizontal frame member 20, the middle horizontal frame member 21, the lower horizontal frame member 22, and the vertical frame member 23 are provided in the opening 111 of the refrigerator main body 11. These frame members 20 to 23 are formed in a square tubular shape whose back surface is closed or opened by, for example, bending a steel plate or the like.

Inside the frame members 20 to 23, members having heat insulating properties such as styrofoam, sponge, and urethane foam are provided. The upper horizontal frame member 20 is provided at a substantially central portion in the vertical direction of the refrigerator main body 11, and connects the left side wall 12 and the right side wall 13. The middle horizontal frame member 21 is below the upper horizontal frame member 20 and connects the left side wall 12 and the right side wall 13. The lower horizontal frame member is below the middle horizontal frame member 21 and connects the left side wall 12 and the right side wall 13. The vertical frame member 23 is located substantially at the center of the middle horizontal frame member 21 and the lower horizontal frame member 22 in the left-right direction, and connects the middle horizontal frame member 21 and the lower horizontal frame member 22.

A heat insulating partition plate 25 having a heat insulating material is provided behind the middle horizontal frame member 21, and partitions the inside of the refrigerator main body 11 into storage chambers having different temperature zones. In this case, the upper part of the heat insulating partition plate 25 is set to the storage chamber in the refrigerating temperature zone, and the lower part of the heat insulating partition plate 25 is set to the storage chamber in the freezing temperature zone.

Specifically, inside the refrigerator main body 11 and above the heat insulating partition plate 25, as a refrigerating storage chamber in a refrigerating temperature zone (for example, 1 to 6 ° C.), a refrigerating chamber 30 and a vegetable compartment 31 are arranged in order from the top. It is provided. The refrigerating room 30 and the vegetable room 31 are separated by a resin partition plate 26 provided behind the upper horizontal frame member 20. As shown in FIG. 1, a vent 261 is formed at the rear of the partition plate 26, and the refrigerating chamber 30 and the vegetable compartment 31 communicate with each other through the vent 261.

A refrigerating room temperature sensor 48 for detecting the temperature inside the refrigerating room 30 is provided on the back surface of the refrigerating room 30, and the temperatures in the refrigerating room 30 and the vegetable room 31 are controlled based on the detected temperature of the sensor 48. Will be done. The refrigerating room 30 and the vegetable room 31 are usually set to temperatures in different refrigerating temperature zones. For example, the maintenance temperature of the refrigerator compartment 30 is set to 1 to 5 ° C., and the maintenance temperature of the vegetable compartment 31 is set to 2 to 6 ° C., which is slightly higher than that.

Below the heat insulating partition plate 25, an ice making chamber 32, an upper freezing chamber 33, and a lower freezing chamber 34 are provided as a freezing storage chamber in a freezing temperature range (for example, −10 to −20 ° C.). The ice making chamber 32 and the upper freezing chamber 33 are provided side by side below the heat insulating partition plate 25. The lower freezing chamber 34 is located below the ice making chamber 32 and the upper freezing chamber 33, that is, at the bottom of the refrigerator body 11.

A freezing room temperature sensor 49 for detecting the temperature inside the lower freezing room 34 is provided on the back surface of the lower freezing room 34, and the ice making room 32, the upper freezing room 33, and the lower stage are based on the detected temperature of the sensor 49. The temperature in the freezing chamber 34 is controlled. The ice making chamber 32, the upper freezing chamber 33, and the lower freezing chamber 34 are all set to a freezing temperature zone, for example, a negative temperature zone of −10 to −20 ° C.

In the present embodiment, a front end portion of the left side wall 12, a front end portion of the right side wall 13, a front end portion of the ceiling wall 14, and a front opening 301 surrounded by the upper horizontal frame member 20 are formed on the front surface of the refrigerator compartment 30. Has been done. The front surface of the vegetable compartment 31 is formed with a front opening 311 surrounded by a front end of the left side wall 12, a front end of the right side wall 13, an upper horizontal frame member 20, and a middle horizontal frame member 21.

The front opening 301 of the refrigerator compartment 30 is closed by a hinge opening / closing type refrigerator compartment door 35. The refrigerator compartment door 35 is provided with a humidity sensor 27 that detects the humidity of the installation atmosphere of the refrigerator 10 and an outside temperature sensor 28 that detects the temperature of the installation atmosphere of the refrigerator 10 (outside temperature).

The front opening 311 of the vegetable compartment 31 is closed by a drawer-type vegetable compartment door 36 so as to be openable and closable. A storage container 37 configured in two upper and lower stages is attached to the back surface of the vegetable compartment door 36. Vegetables, fruits and the like are stored in the storage container 37.

On the front surface of the ice making chamber 32, a front opening 321 surrounded by a front end portion of the left side wall 12, a middle horizontal frame member 21, a lower horizontal frame member 22, and a vertical frame member 23 is formed. On the front surface of the upper freezing chamber 33, a front opening 331 surrounded by a front end portion of the right side wall 13, a middle horizontal frame member 21, a lower horizontal frame member 22, and a vertical frame member 23 is formed. The front surface of the lower freezing chamber 34 is formed with a front end portion of the left side wall 12, a front end portion of the right side wall 13, a front end portion of the bottom wall 15, and a front opening 341 surrounded by the lower horizontal frame member 22. ..

The front opening 331 of the upper freezing chamber 33 is closed openably and closably by a drawer-type upper freezing chamber door 39 to which the storage container 38 is connected. The front opening 341 of the lower freezing chamber 34 is closed openably and closably by a drawer-type lower freezing chamber door 41 to which the upper and lower two-stage storage containers 40 are connected. Although not shown in detail, the front opening 321 of the ice making chamber 32 is also closed openable and closable by a drawer-type ice making chamber door to which a storage container is connected.

The refrigerator body 11 incorporates a refrigeration cycle 50 (see FIG. 3) that cools each storage chamber. The details will be described later, but in the freezing cycle 50, the refrigerating chamber 30 which is a storage chamber in the refrigerating temperature zone, the refrigerating cooler 51 for cooling the vegetable compartment 31, the ice making chamber 32 which is the storage chamber in the freezing temperature zone, and the upper stage. It is configured to include a freezing chamber 33 and a freezing cooler 53 for cooling the lower freezing chamber 34.

As shown in FIG. 1, a machine room 29 is provided outside the outer box 17 of the refrigerator main body 11, in this example, at the lower end of the back surface of the refrigerator main body 11. In the machine room 29, a compressor 55 and a condenser 58 (see FIG. 3) constituting the refrigeration cycle 50, a heat radiating fan 56 for cooling them (see FIG. 4), and the like are arranged.

At the rear of the refrigerating chamber 30 and the vegetable compartment 31, there is a refrigerating cooler chamber 43 partitioned front and back by an EVA cover 42 and the back surface of the inner box 18, and a refrigerating duct 44 connecting the refrigerating cooler chamber 43 and the refrigerating chamber 30. It is provided. The refrigerating cooler room 43 houses the refrigerating cooler 51, the refrigerating fan 52, and the like. The refrigerating fan 52 cools these storage chambers by supplying the air in the refrigerating cooler chamber 43 cooled by the refrigerating cooler 51 to the refrigerating chamber 30 and the vegetable compartment 31 via the refrigerating duct 44.

At the rear of the ice making chamber 32, the upper freezing chamber 33 and the lower freezing chamber 34, there are a freezing cooler chamber 46 partitioned front and back by an EVA cover 45 and the back of the inner box 18, and an ice making chamber 32, an upper freezing chamber 33 and a lower A freezing duct 47 connecting the freezing chamber 34 and the freezing cooler chamber 46 is formed. The freezing cooler room 46 houses a freezing cooler 53, a freezing fan 54, and the like. The freezing fan 54 supplies the air in the freezing cooler chamber 46 cooled by the freezing cooler 53 to the ice making chamber 32, the upper freezing chamber 33, and the lower freezing chamber 34 via the freezing duct 47 to store them. Cool the room.

A control device 90 on which a microcomputer or the like for controlling the refrigerator 10 is mounted is provided on the outside of the refrigerator body 11, for example, on the rear surface of the upper surface of the ceiling wall 14 of the refrigerator body 11. The control device 90 includes a microcomputer, a memory, and the like, and constitutes a control unit that controls the overall operation of the refrigerator 10. As shown in FIG. 4, the control device 90 includes a humidity sensor 27, an outside temperature sensor 28, a refrigerating room temperature sensor 48, a refrigerating room temperature sensor 49, a refrigerating fan 52, a refrigerating fan 54, a compressor 55, a heat dissipation fan 56, and the like. The three-way valve 57 is connected, and the refrigerating fan 52, the refrigerating fan 54, and the heat radiating fan 56 rotate based on the detection signals input from the various sensors 27, 28, 48, and 49 and the control program stored in the memory in advance. It controls the speed, the operating frequency of the compressor 55, the three-way valve 57, and the like.

(2) Configuration of Refrigeration Cycle 50 Next, the configuration of the refrigeration cycle 50 will be described in detail. As shown in FIG. 3, the refrigeration cycle 50 includes a compressor 55 having a variable capacity capable of changing the amount of refrigerant discharged by changing the operating frequency. The inlets of the condenser 58, the heat radiating pipe 59, and the three-way valve 57 are sequentially connected to the discharge side 55a of the compressor 55.

At one outlet (first outlet) 57a of the three-way valve 57, a first dew-proof pipe (freezing and dew-proof pipe) 60, a refrigerating and depressurizing device 61 such as a capillary tube, a refrigerating cooler 53, and a check valve 62 are connected by piping. They are connected in order.

A refrigerating and depressurizing device 63 such as a capillary tube and a refrigerating cooler 51 are sequentially connected to the other outlet (second outlet) 57b of the three-way valve 57 by piping. The outlet side of the refrigerating cooler 51 is connected to the suction side 55b of the compressor 55 as a single outlet side of the check valve 62.

After the condenser 58, the heat radiating pipe 59, the three-way valve 57 and the first dew-proof pipe 60 provided from the discharge side 55a of the compressor 55 to the refrigerating / depressurizing device 61 and the refrigerating / depressurizing device 63 are discharged by the compressor 55. It constitutes a part of the high temperature side refrigerant flow path through which the high temperature liquid refrigerant before being decompressed by the refrigerating / depressurizing device 61 and the refrigerating / depressurizing device 63 flows.

The condenser 58 is composed of, for example, a fin tube having a large number of heat dissipation fins, and is provided on the back side of the refrigerator main body 11. The heat radiating pipe 59 is made of a metal pipe such as iron or copper, and is routed inside the rear wall 16 in a state where the upstream end portion enters the rear wall 16 from the machine room 29 and is in contact with the outer box 17. After that, the inside of the ceiling wall 14 is routed around in a state of entering the ceiling wall 14 and contacting the outer box 17. The heat radiating pipe 59 cools the high-temperature liquid refrigerant before being decompressed by the refrigerating / depressurizing device 61 and the refrigerating / depressurizing device 63 by exchanging heat with the air outside the refrigerator via the outer box 17. The heat radiating pipe 59 enters the machine room 29 after being routed inside the ceiling wall 14, and is connected to the three-way valve 57.

The three-way valve 57 is an electronic expansion valve that has both a switching function for switching the refrigerant flowing from the inlet to either the first outlet 57a or the second outlet 57b and flowing the refrigerant, and a flow rate throttle function for changing the opening degree (throttle degree). Become.

(3) First dew-proof pipe 60
The upstream end of the first dew-proof pipe 60 is connected to the first outlet 57a of the three-way valve 57 in the machine room 29. Then, as shown in FIG. 5, the first dew-proof pipe 60 enters the left side wall 12 from the machine room 29, and then the front surface of the freezing storage room (ice making room 32, upper freezing room 33, and lower freezing room 34). It is provided in contact with the inside of the outer box 17 along the periphery of the opening. As a result, the first dew-proof pipe 60 transfers the heat of the refrigerant flowing inside to the outer box 17 to suppress dew condensation around the front openings of the freezing storage chambers 32, 33, 34. Functions as.

Specifically, the first dew-proof pipe 60 includes an upper-stage freezing and dew-proof pipe 601 connected to the first outlet 57a of the three-way valve 57 and a lower-stage freezing and dew-proof pipe 60 connected to the downstream side of the upper-stage freezing and dew-proof pipe 601. It is composed of a pipe 602. The upper freezing and dew-proof pipe 601 and the lower freezing and dew-proof pipe 602 are connected by brazing or the like in the machine room 29, and the two dew-proof pipes 601 and 602 are separated inside the refrigerator main body 11.

After entering the inside of the lower end of the left side wall 12 from the machine room 29, the upper freezing and dew-proof pipe 601 bends upward and extends upward to the vicinity of the ceiling wall 14 while being in contact with the inside of the outer box 17. Then, when the upper freezing and dew-proof pipe 601 reaches the upper end of the left side wall 12, it bends forward and extends forward along the upper end edge of the left side wall 12, and faces downward near the opening 111 of the refrigerator body 11. It bends. Then, the upper freezing and dew-proof pipe 601 extends linearly downward inside the front end of the left side wall 12. At this time, the upper freezing and dew-proof pipe 601 is located slightly behind the front edge of the left side wall 12.

Then, when the upper freezing and dew-proof pipe 601 reaches the height position of the middle horizontal frame member 21, it bends forward and advances to the front edge of the left side wall 12. Then, the upper freezing and dew-proof pipe 601 extends vertically downward again while being in contact with the inside of the outer box 17, bends rearward when reaching the vicinity of the bottom wall 15, and extends rearward along the lower end portion of the left side wall 12. Then, it enters the machine room 29 from the lower rear end of the left side wall 12.

As described above, the upper freezing and dew-proof pipe 601 is provided at the left edge of the front opening of the ice making chamber 32 and the lower freezing chamber 34, and is also provided around the left wall 12. Then, the upper freezing and dew-proof pipe 601 returns to the machine room 29 again and is connected to the upstream end of the lower freezing and dew-proof pipe 602 by brazing or the like.

After entering the inside of the lower end of the right side wall 13 from the machine room 29, the lower freezing and dew-proof pipe 602 bends upward and extends upward to the vicinity of the ceiling wall 14 while being in contact with the inside of the outer box 17. Then, when the lower freezing and dew-proof pipe 602 reaches the upper end of the right side wall 13, it bends forward and extends forward along the upper end edge of the right side wall 13, and faces downward near the opening 111 of the refrigerator body 11. It bends. Then, the lower freezing and dew-proof pipe 602 extends linearly downward inside the front end of the right side wall 13. At this time, the lower freezing and dew-proof pipe 602 is located slightly behind the front edge of the right side wall 13.

Then, when the lower freezing and dew-proof pipe 602 reaches the height position of the middle-stage horizontal frame member 21, it bends forward and advances to the front edge portion of the right side wall 13. Then, the lower freezing and dew-proof pipe 602 bends to the left and enters the inside of the middle horizontal frame member 21. After that, the lower freezing and dew-proof pipe 602 extends to the left inside the middle horizontal frame member 21, is folded back in front of the left side wall 12, is routed inside the vertical frame member 23 on the way, and then is again on the right side. Enter the front end of the wall 13. After that, the lower freezing and dew-proof pipe 602 bends downward, extends downward in the front end portion of the right side wall 13, and when it reaches the height position of the lower horizontal frame member 22, it bends downward and laterally. Enter the inside of the frame member 22. After that, the lower freezing and dew-proof pipe 602 extends to the left inside the lower horizontal frame member 22, is folded back in front of the left side wall 12, and then extends to the right inside the lower horizontal frame member 22. Enter the front end of the right wall 13 again.

After that, the lower freezing and dew-proof pipe 602 bends downward and extends downward along the front end edge of the right side wall 13. Then, when the lower freezing and dew-proof pipe 602 reaches the vicinity of the bottom wall 15, it bends to the left, enters the front end of the bottom wall 15, extends to the left in the front end of the bottom wall 15, and extends to the left. After folding back in front of 12, it extends rightward in the front end of the bottom wall 15 and enters the front end of the right wall 13 again. Then, the lower freezing and dew-proof pipe 602 extends rearward in the lower end of the right side wall 13 and enters the lower rear end of the right side wall 13 or the machine room 29. The downstream end of the lower freezing and dew-proof pipe 602 that has entered the machine room 29 is connected to the freezing and depressurizing device 61.

As described above, the lower freezing and dew-proof pipe 602 is provided in the outer box 17 along the periphery of the front opening of the ice making chamber 32 and the lower freezing chamber 34 except for the left edge of the front opening of the ice making chamber 32 and the lower freezing chamber 34. It is provided on the inside in a contact state, and is also provided around the right side wall 13. The lower freezing and dew-proof pipe 602 is connected to the upper freezing and dew-proof pipe 601 provided at the left edge of the front opening of the ice-making chamber 32 and the lower freezing chamber 34 in the machine room 29, and is connected to the ice-making chamber 32 and the upper freezing. It is separated from the upper freezing and dew-proof pipe 601 around the front opening of the chamber 33 and the lower freezing chamber 34.

The refrigerant flowing through the upper refrigerating and dew-proof pipe 601 and the lower refrigerating and dew-proof pipe 602 is depressurized by the refrigerating and depressurizing device 61 composed of a capillary tube, and then vaporized by the refrigerating condenser 53 to lower the temperature of the refrigerating condenser 53. Let me. The refrigerant flowing out of the freezing cooler 53 is taken into the compressor 55.

(4) Control of Refrigerator 10 Next, control of the refrigerator 10 will be described.

(4-1) Refrigerating mode and refrigerating mode The control device 90 controls the compressor 55, the refrigerating fan 52, the refrigerating fan 54, and the three sides based on the internal temperature detected by the refrigerating room temperature sensor 48 and the freezing room temperature sensor 49. By controlling the valve 57, the refrigerating mode for cooling the refrigerating storage chambers 32, 33, 34 and the refrigerating mode for cooling the refrigerating storage chambers 30, 31 are alternately switched and executed.

Specifically, when executing the refrigeration mode, the control device 90 switches the three-way valve 57 so as to communicate the inlet of the three-way valve 57 and the first outlet 57a while driving the compressor 55 and the refrigeration fan 54. .. As a result, the refrigerant liquefied by the condenser 58 is depressurized so as to be easily vaporized while being cooled through the first dew-proof pipe 60 and the refrigerating / depressurizing device 61, and then supplied to the refrigerating / cooling device 53. The air of 46 is cooled to generate cold air of about -20 to -30 ° C. That is, in the present embodiment, the freezing mode is a mode in which the refrigerant flows through the first dew-proof pipe 60.

Then, the generated cold air is supplied to the ice making chamber 32, the upper freezing chamber 33 and the lower freezing chamber 34 via the freezing duct 47 by the rotation of the freezing fan 54, whereby the temperature sensor 49 provided in the lower freezing chamber 34 is provided. The ice making chamber 32, the upper freezing chamber 33, and the lower freezing chamber 34 are cooled so that the detected temperature of the above becomes a predetermined temperature.

Further, when the refrigerating mode is executed, the control device 90 switches the three-way valve 57 so as to communicate the inlet of the three-way valve 57 and the second outlet 57b while driving the compressor 55 and the refrigerating fan 52. As a result, the refrigerant liquefied by the condenser 58 is decompressed through the refrigerating depressurizer 63 so as to be easily vaporized, and then supplied to the refrigerating cooler 51 to cool the air in the refrigerating condenser chamber 43 to −10 to 10. Generates cold air of about -20 ° C. The generated cold air is supplied to the refrigerating chamber 30 and the vegetable compartment 31 via the refrigerating duct 47 by the rotation of the refrigerating fan 52, so that the detection temperature of the temperature sensor 48 provided in the refrigerating chamber 30 becomes a predetermined temperature. In addition, the refrigerator compartment 30 and the vegetable compartment 31 are cooled.

(4-2) Control of the three-way valve 57 The three-way valve 57 receives a control command from the control device 90 during execution of the refrigeration mode, and controls the flow rate of the refrigerant supplied to the first outlet 57a to control the first outlet. The temperature of the refrigerant flowing out of 57a is changed.

Specifically, when the humidity of the installation atmosphere of the refrigerator 10 detected by the humidity sensor 27 is equal to or less than a predetermined value during execution of the freezing mode, the control device 90 exceeds the predetermined value of the humidity of the installation atmosphere of the refrigerator 10. The valve opening degree of the three-way valve 57 is made smaller than in the case. For example, when the humidity detected by the humidity sensor 27 exceeds a predetermined value while the freezing mode is being executed, the control device 90 opens the valve opening of the three-way valve 57 fully and determines the humidity detected by the humidity sensor 27. If it is less than or equal to the value, the valve opening degree of the three-way valve 57 is changed small.

As a result, the pressure drop of the refrigerant in the three-way valve 57 becomes large, and the refrigerant supplied to the upper freezing and dew-proof pipe 601 from the first outlet 57a of the three-way valve 57 is compared with the case where the humidity of the installation atmosphere exceeds a predetermined value. The temperature drops. As a result, the temperatures of the upper-stage freezing and dew-proof pipe 601 and the lower-stage freezing and dew-proof pipe 602 are lower than before the valve opening degree of the three-way valve 57 is reduced.

The timing for changing the valve opening degree of the three-way valve 57 is, for example, when the humidity detected by the humidity sensor 27 changes from a high humidity exceeding a predetermined value to a low humidity below a predetermined value during execution of the freezing mode. The opening degree can be reduced and the valve opening degree can be increased when the humidity changes from low humidity below a predetermined value to high humidity exceeding a predetermined value during execution of the freezing mode.

Further, when the humidity of the installation atmosphere of the refrigerator 10 detected by the humidity sensor 27 is equal to or less than a predetermined value immediately before the execution of the freezing mode (for example, the refrigerating mode is being executed or the compressor 55 is stopped), the inlet of the three-way valve 57 When the three-way valve 57 is switched so as to communicate with the first outlet 57a, that is, the valve opening degree can be reduced at the same time as the start of the freezing mode.

Further, when starting the refrigerating mode after the end of the freezing mode (when switching from the freezing mode to the refrigerating mode), the control device 90 maintains or increases the valve opening degree of the three-way valve 57. That is, if the valve opening is not set small in the immediately preceding refrigeration mode, the same valve opening is maintained even after the refrigeration mode is started, and if the valve opening is set small in the immediately preceding refrigeration mode, the refrigeration mode is used. The valve opening is increased at the same time as the start of.

(5) Effect In the refrigerator 10 of the present embodiment as described above, the amount of refrigerant flowing through the first dew-proof pipe 60 can be changed by the three-way valve 57, so that the humidity detected by the humidity sensor 27 has a predetermined value. In a situation where dew condensation is likely to occur, a high-temperature refrigerant can be circulated through the first dew-proof pipe 60 to heat the area around the front openings of the freezing storage chambers 32, 33, and 34, thereby preventing dew condensation. it can. Further, in a situation where the humidity detected by the humidity sensor 27 is equal to or less than a predetermined value and dew condensation is unlikely to occur, by reducing the valve opening degree of the three-way valve 57, the first dew-proof pipe is compared with the situation where dew condensation is likely to occur. It is possible to lower the temperature of 60 and prevent the peripheral edge of the front opening of the freezing storage chambers 32, 33, 34 from being unnecessarily heated. As a result, in the refrigerator 10, the temperature rise of the freezing storage chambers 32, 33, 34 due to the heat inflow from the first dew-proof pipe 60 can be suppressed, and a high energy saving effect can be obtained.

Further, when switching from the freezing mode to the refrigerating mode, the control device 90 maintains or increases the valve opening degree of the three-way valve 57, so that the amount of refrigerant flowing to the refrigerating cooler 51 in the refrigerating mode can be secured. The refrigerated storage chambers 30 and 31 can be cooled to a desired temperature.

(Modification 1 of the first embodiment)
In the first embodiment described above, when the humidity of the installation atmosphere of the refrigerator 10 detected by the humidity sensor 27 is equal to or less than a predetermined value during the execution of the freezing mode in which the refrigerant flows through the first dew-proof pipe 60, the three-way valve 57 The control for reducing the valve opening degree (hereinafter, this control may be referred to as the first control) has been described, but the opening degree of the three-way valve 57 is controlled based on the operating frequency of the compressor 55 (hereinafter, this control is performed). The opening degree of the three-way valve 57 is controlled based on the detection value of the freezing room temperature sensor 49 that detects the temperature inside the storage room 34 that is cooled by executing the refrigerating mode (sometimes referred to as the second control) (hereinafter referred to as the second control). , This control may be referred to as a third control).

That is, in the second control, when the operating frequency of the compressor 55 is equal to or less than the predetermined value during the execution of the freezing mode, the valve opening degree of the three-way valve 57 is smaller than that when the operating frequency of the compressor 55 exceeds the predetermined value. To do. For example, when the operating frequency of the compressor 55 exceeds a predetermined value while the refrigeration mode is being executed, the control device 90 opens the valve opening of the three-way valve 57 fully and the operating frequency of the compressor 55 is equal to or less than the predetermined value. , The valve opening degree of the three-way valve 57 is changed to be small.

If the valve opening degree of the three-way valve 57 is reduced when the operating frequency of the compressor 55 is high and the refrigerant flow rate is large, the pressure loss in the three-way valve 57 becomes large, and the temperature of the first dew-proof pipe 60 may drop too much. In the second control, when the operating frequency of the compressor 55 is equal to or less than a predetermined value, the valve opening degree of the three-way valve 57 is changed to a small value, so that the temperature of the first dew-proof pipe 60 does not drop too much and refrigeration is performed. Condensation around the front openings of the storage chambers 32, 33, 34 can be suppressed.

Further, in the third control, when the internal temperature of the lower freezing chamber 34 detected by the freezing chamber temperature sensor 49 during the execution of the freezing mode is equal to or lower than the predetermined temperature, the internal temperature is higher than the predetermined temperature. Reduce the operating frequency of the three-way valve. For example, when the temperature inside the refrigerator detected by the freezing chamber temperature sensor 49 exceeds a predetermined temperature while the refrigerating mode is being executed, the control device 90 fully opens the valve opening degree of the three-way valve 57, and the temperature inside the refrigerator becomes the predetermined temperature. In the following cases, the valve opening degree of the three-way valve 57 is changed small.

When the temperature inside the lower freezing chamber 34 is high during the execution of the freezing mode, the operating frequency of the compressor 55 is usually high and the refrigerant flow rate is large. Therefore, if the valve opening degree of the three-way valve 57 is reduced when the temperature inside the lower freezer chamber 34 is high, the pressure loss in the three-way valve 57 becomes large, and the temperature of the first dew-proof pipe 60 may drop too much. In the third control, when the temperature inside the lower freezing chamber 34 is equal to or lower than the predetermined temperature, the valve opening degree of the three-way valve 57 is changed to a small value, so that the temperature of the first dew-proof pipe 60 does not drop too much. , Condensation around the front openings of the freezing storage chambers 32, 33, 34 can be suppressed.

The second control and the third control may be executed in place of the first control described above, or may be executed together with the first control described above. When the second control or the third control is executed together with the first control, a condition for reducing the valve opening degree of the three-way valve 57 in any one of the first control, the second control, and the third control. The valve opening degree of the three-way valve 57 may be reduced when the above conditions are satisfied, and the valve opening degree of the three-way valve 57 may be reduced in any two of the first control, the second control, and the third control. The valve opening of the three-way valve 57 may be reduced when the conditions are satisfied, or the valve of the three-way valve 57 may be reduced when the conditions for reducing the valve opening of the three-way valve 57 are satisfied in all controls. The opening degree may be reduced.

Further, in the second control, the control device 90 may control the valve opening degree of the three-way valve 57 according to the operating frequency of the compressor 55.

For example, in the second control, when the operating frequency of the compressor 55 exceeds the first predetermined value C1, the valve opening of the three-way valve 57 is fully opened, and the operating frequency of the compressor 55 is the first predetermined value. When C1 or less, the valve opening of the three-way valve 57 is reduced, and when the operating frequency of the compressor 55 is less than the first predetermined value C1 and the second predetermined value C2 (C2 <C1) or less, the valve of the three-way valve 57 is opened. The degree may be further reduced as compared with the case of the first predetermined value C1. Alternatively, in the second control, the control device 90 may gradually reduce the valve opening degree of the three-way valve 57 as the operating frequency of the compressor 55 decreases.

Further, in the third control, the control device 90 may control the valve opening degree of the three-way valve 57 according to the temperature inside the lower freezing chamber 34 detected by the freezing chamber temperature sensor 49 being the first temperature T1.

For example, in the third control, when the temperature inside the lower freezer chamber 34 detected by the freezer temperature sensor 49 exceeds the first temperature T1, the control device 90 fully opens the valve opening degree of the three-way valve 57 and sets the inside of the refrigerator. When the temperature is the first temperature T1 or less, the valve opening of the three-way valve 57 is reduced, and when the internal temperature is smaller than the first temperature T1 and the second temperature T2 (T2 <T1) or less, the valve of the three-way valve 57 is opened. The degree may be further reduced as compared with the case of the first temperature T1. Alternatively, in the third control, the control device 90 may gradually reduce the valve opening degree of the three-way valve 57 as the temperature inside the lower freezing chamber 34 decreases.

(Modification 2 of the first embodiment)
In the first embodiment described above, the case where the first dew-proof pipe 60 is a free-frozen dew-proof pipe provided around the front openings of the freezing storage chambers 32, 33, 34 has been described, but the refrigerating storage chamber 30 , 31 may be a refrigerated dew-proof pipe provided around the front opening.

(Second Embodiment)
The second embodiment will be described mainly based on FIGS. 6 and 7, focusing on parts different from the first embodiment. The same components as those of the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

In the first embodiment described above, a case where the dew-proof pipe for heating the periphery of the front opening of the storage chamber to suppress dew condensation is arranged only on the downstream side of the first outlet 57a of the three-way valve 57 has been described. However, in the present embodiment, the first dew-proof pipe 160 is provided on the downstream side of the first outlet 57a of the three-way valve 57, and the second dew-proof pipe 64 is provided on the upstream side of the inlet of the three-way valve 57.

Specifically, the second dew-proof pipe 64 provided on the upstream side of the inlet of the three-way valve 57 is from the same free-frozen dew-proof pipe as the upper-stage free-frozen dew-proof pipe 601 and the lower-stage refrigerated dew-proof pipe 602 shown in FIG. It is configured.

That is, as shown in FIG. 7, the upper freezing and dew-proof pipe 601 is provided at the left edge of the front opening of the ice making room 32 and the lower freezing room 34 after entering the inside of the lower end of the left side wall 12 from the machine room 29. At the same time, it is also routed to the left side wall 12, returns to the machine room 29, and is connected to the upstream end of the lower freezing and dew-proof pipe 602 by brazing or the like. The lower freezing and dew-proof pipe 602 is provided at the upper and lower edges and the right edge of the front opening of the ice making room 32, the upper freezing room 33 and the lower freezing room 34 after entering the inside of the lower end of the right side wall 13 from the machine room 29. At the same time, it is also routed around the right side wall 13 and enters the lower rear end of the right side wall 13 or the machine room 29. The downstream end of the lower freezing and dew-proof pipe 602 that has entered the machine room 29 is connected to the inlet of the three-way valve 57.

As shown in FIG. 7, the first dew-proof pipe 160 enters the left side wall 12 from the machine room 29, and then opens the front of the refrigerating storage room (refrigerating room 30 and vegetable room 31) excluding the middle horizontal frame member 21. It is provided in contact with the inside of the outer box 17 along the periphery of the portion. As a result, the first dew-proof pipe 160 serves as a refrigerated dew-proof pipe 603 that suppresses dew condensation around the front openings of the refrigerated storage chambers 30 and 31 by transferring the heat of the refrigerant flowing inside to the outer box 17. Function.

Specifically, the refrigerated dew-proof pipe 603 enters the inside of the lower end of the left side wall 12 from the machine room 29 and extends forward along the lower end edge of the left side wall 12. After that, the refrigerated dew-proof pipe 603 bends upward at the front end of the left side wall 12, that is, near the opening 111 of the refrigerator body 11. Then, the refrigerated dew-proof pipe 603 extends linearly upward along the front end edge of the left side wall 12 inside the front end of the left side wall 12. At this time, the refrigerated dew-proof pipe 603 is located slightly behind the front edge of the left side wall 12 and is in contact with the inside of the outer box 17.

After that, when the refrigerated dew-proof pipe 603 reaches the height position of the middle horizontal frame member 21, it bends forward and advances to the front edge of the left side wall 12, and then moves vertically upward again while being in contact with the inside of the outer box 17. Extend towards.

Then, when the refrigerated dew-proof pipe 603 reaches the height position of the upper horizontal frame member 20, it bends to the right, enters the inside of the upper horizontal frame member 20, and then passes through the front end portion of the upper horizontal frame member 20. It extends to the right, folds back in front of the right wall 13, extends to the left in the front end of the upper horizontal frame member 20, and reenters the front end of the left wall 12.

Then, the refrigerated dew-proof pipe 603 bends upward, extends upward along the front end edge of the left side wall 12 while being in contact with the inside of the outer box 17, and when it reaches the ceiling wall 14, bends upward to the right. It becomes horizontal and extends to the right side wall 13 along the front end edge of the ceiling wall 14 while touching the inside of the outer box 17, and then bends downward, touching the inside of the outer box 17 and extending to the front end edge of the right side wall 13. It extends vertically downward to the height position of the middle horizontal frame member 21 along the portion.

Then, when the refrigerating dew-proof pipe 603 reaches the middle horizontal frame member 21, it bends backward, and then extends vertically downward again while being in contact with the inside of the outer box 17, and after reaching the vicinity of the bottom wall 15. , Extends in the lower end of the right side wall 13 and enters the machine room 29 from the lower rear end of the right side wall 13.

Then, the downstream end of the refrigerated dew-proof pipe 603 that has entered the machine room 29 is connected to the refrigerated decompression device 63.

In the present embodiment, the second dew-proof pipe 64 connected to the upstream side of the three-way valve 57 constitutes a refrigerating and dew-proof pipe that suppresses dew condensation around the front openings of the refrigerating storage chambers 32, 33, and 34. The first dew-proof pipe 160 connected to the downstream side of the three-way valve 57 functions as a refrigerated dew-proof pipe 603 that suppresses dew condensation around the front openings of the refrigerated storage chambers 30 and 31.

As a result, the second dew-proof pipe through which a relatively high-temperature refrigerant flows around the front openings of the freezing storage chambers 32, 33, 34, which are more likely to cause dew condensation around the front openings than the refrigerated storage chambers 30 and 31. 64 is provided, and dew condensation around the front openings of the freezing storage chambers 32, 33, 34 can be effectively suppressed. Further, the refrigerated storage chambers 30 and 31 are less likely to cause dew condensation around the front openings than the freezing storage chambers 32, 33 and 34, and are connected to the downstream side of the three-way valve 57 around the front openings. Since 1 dew-proof pipe 160 is provided, the temperature of the first dew-proof pipe 160 can be changed by controlling the valve opening degree of the three-way valve 57, and the front openings of the refrigerating storage chambers 30 and 31 can be changed. It is possible to prevent the surroundings from being unnecessarily heated.

(Modification 1 of the second embodiment)
In the second embodiment described above, the first dew-proof pipe 160 that functions as the refrigerated dew-proof pipe 603 that suppresses dew condensation around the front openings of the refrigerated storage chambers 30 and 31 is attached to the first outlet 57a of the three-way valve 57. Although the case where the pipe is provided on the downstream side has been described, the first dew-proof pipe 260 may be provided on the downstream side of the second outlet 57b of the three-way valve 57 as shown in FIG.

In this modified example, the first dew-proof pipe 260 is provided on the downstream side of the second outlet 57b of the three-way valve 57, and the refrigerant is supplied to the first dew-proof pipe 260 (that is, the refrigerated dew-proof pipe) while the refrigerating mode is being executed. Since it flows through 603), it is possible to heat the periphery of the front openings of the refrigerated storage chambers 30 and 31 when dew condensation is likely to occur.

When the first dew-proof pipe 260 connected to the second outlet 57b of the three-way valve 57 is provided around the front openings of the refrigerating storage chambers 30 and 31, as in this modified example, the control device 90 is as follows. Control can be performed.

That is, when the humidity detected by the humidity sensor 27 during the execution of the refrigeration mode is equal to or less than a predetermined value, the control device 90 is concerned with the humidity detected by the humidity sensor 27 in the refrigeration mode executed after the end of the refrigeration mode. Instead, the temperature of the first dew-proof pipe 260 is lowered by reducing the valve opening degree of the three-way valve 57.

If the humidity detected by the humidity sensor 27 or less during the execution of the refrigerating mode executed immediately before the refrigerating mode is equal to or less than a predetermined value, it occurs around the front openings of the refrigerating storage chambers 30 and 31 by the time the refrigerating mode is started. The amount of dew condensation is small.

Therefore, if the humidity detected by the humidity sensor 27 during the execution of the refrigeration mode is equal to or less than a predetermined value, the humidity detected by the humidity sensor 27 in the refrigeration mode executed after the end of the refrigeration mode exceeds the predetermined value. Also, the control device 90 reduces the valve opening degree of the three-way valve 57 to lower the temperature of the first dew-proof pipe 260. As a result, it is possible to prevent the periphery of the front openings of the refrigerated storage chambers 30 and 31 from being unnecessarily heated.

(Third Embodiment)
The third embodiment will be described mainly based on FIGS. 9 and 10, focusing on parts different from the first embodiment. The same components as those of the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

In the first embodiment described above, a case where the dew-proof pipe for heating the periphery of the front opening of the storage chamber to suppress dew condensation is arranged only on the downstream side of the first outlet 57a of the three-way valve 57 has been described. However, in the present embodiment, as shown in FIG. 9, the first dew-proof pipe 360 is provided on the downstream side of the first outlet 57a of the three-way valve 57, and the third is provided on the downstream side of the second outlet 57b of the three-way valve 57. A dew-proof pipe 66 is provided.

Specifically, the first dew protection pipe 360 provided on the downstream side of the first outlet 57a of the three-way valve 57 has the same anti-freezing protection as the upper refrigeration and dew protection pipe 601 and the lower refrigeration and dew protection pipe 602 shown in FIG. It consists of a dew pipe. Further, the third dew-proof pipe 66 provided on the downstream side of the second outlet 57b of the three-way valve 57 is composed of a refrigerated dew-proof pipe 603 similar to the refrigerated dew-proof pipe 603 shown in FIG.

That is, as shown in FIG. 10, the upper freezing and dew-proof pipe 601 is provided at the left edge of the front opening of the ice making room 32 and the lower freezing room 34 after entering the inside of the lower end of the left side wall 12 from the machine room 29. At the same time, it is also routed to the left side wall 12, returns to the machine room 29, and is connected to the upstream end of the lower freezing and dew-proof pipe 602 by brazing or the like.

The lower freezing and dew-proof pipe 602 is provided at the upper and lower edges and the right edge of the front opening of the ice making room 32, the upper freezing room 33 and the lower freezing room 34 after entering the inside of the lower end of the right side wall 13 from the machine room 29. At the same time, it is also routed around the right side wall 13 and enters the lower rear end of the right side wall 13 or the machine room 29. The downstream end of the lower freezing and dew-proof pipe 602 that has entered the machine room 29 is connected to the freezing and depressurizing device 61.

Further, after the refrigerated dew-proof pipe 603 enters the inside of the lower end of the left side wall 12 from the machine room 29, the outer box 17 is formed along the periphery of the front openings of the refrigerated storage chambers 30 and 31 excluding the middle horizontal frame member 21. It is provided in contact with the inside and enters the lower rear end of the right side wall 13 or the machine room 29. The downstream end of the refrigerated dew-proof pipe 603 that has entered the machine room 29 is connected to the refrigerated decompression device 63.

In the present embodiment, the first dew-proof pipe 360 constituting the upper refrigerating and dew-proof pipe 601 and the lower refrigerating and dew-proof pipe 602 is connected to the first outlet 57a of the three-way valve 57, and is connected to the second outlet 57b of the three-way valve 57. A third dew-proof pipe 66 constituting the refrigerated dew-proof pipe 603 is connected.

As a result, the refrigerant flows through the upper refrigerating and dew-proof pipe 601 and the lower refrigerating and dew-proof pipe 602 during the execution of the refrigerating mode, and the refrigerant flows through the refrigerating and dew-proof pipe 603 during the execution of the refrigerating mode. The surroundings of the front openings of the freezing storage chambers 32, 33, 34 and the refrigerating storage chambers 30, 31 can be heated. Further, since the upper refrigerating and dew-proof pipe 601 and the lower refrigerating and dew-proof pipe 602 and the refrigerating and dew-proof pipe 603 are connected to the outlet side of the three-way valve 57, each dew-proof pipe 601 can be adjusted by adjusting the valve opening degree. , 602, 603 can change the temperature of the refrigerant flowing. As a result, it is possible to prevent the periphery of the front openings of the freezing storage chambers 32, 33, 34 and the refrigerating storage chambers 30, 31 from being unnecessarily heated.

(Other embodiments)
Although the embodiments of the present invention have been described above, these 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.

10 ... Refrigerator, 11 ... Refrigerator body, 27 ... Humidity sensor, 28 ... Outside temperature sensor, 29 ... Machine room, 30 ... Refrigerator room, 31 ... Vegetable room, 32 ... Ice making room, 33 ... Upper freezer room, 34 ... Lower stage Freezer room, 50 ... Refrigerator cycle, 51 ... Refrigerator cooler, 53 ... Refrigerator cooler, 55 ... Compressor, 57 ... Three-way valve, 57a ... First outlet, 57b ... Second outlet, 58 ... Condenser, 59 ... Heat dissipation Pipe, 60 ... 1st dew-proof pipe, 601 ... Upper-stage refrigerating and dew-proof pipe, 602 ... Lower-stage refrigerating and dew-proof pipe, 603 ... Refrigerating and dew-proof pipe, 61 ... Dew pipe, 66 ... 3rd dew-proof pipe

Claims (11)

A refrigerator body with a refrigerated storage room and a freezing storage room inside,
A compressor, a condenser that receives the refrigerant discharged from the compressor, a three-way valve provided on the outlet side of the condenser and having a flow throttle function, and refrigerating and depressurizing connected to the first outlet side of the three-way valve. The device and the refrigerating / cooling device, the refrigerating / depressurizing device and the refrigerating / cooling device connected to the second outlet side of the three-way valve and provided in parallel with the refrigerating / depressurizing device and the refrigerating / cooling device, and pumped from the compressor. With a dew-proof pipe provided around at least one front opening of the refrigerating storage chamber and the refrigerating storage chamber, which constitutes a part of a high-temperature side refrigerant flow path for flowing the refrigerant to the refrigerating cooler and the refrigerating cooler. With a refrigeration cycle,
A control unit that controls the refrigeration cycle is provided.
In a refrigerator, the control unit switches between a refrigerating mode in which a refrigerant flows through the refrigerating cooler to cool the refrigerating storage chamber and a refrigerating mode in which a refrigerant flows through the refrigerating cooler to cool the refrigerating storage chamber. ,
The dew-proof pipe has a first dew-proof pipe connected to one side of the first outlet and the second outlet of the three-way valve.
The control unit is a refrigerator that controls the valve opening degree of the three-way valve to control the temperature of the first dew-proof pipe when the refrigerant is supplied from the three-way valve to the first dew-proof pipe. Equipped with a humidity sensor that detects the humidity of the installation atmosphere of the refrigerator
When the humidity detected by the humidity sensor is equal to or lower than the predetermined humidity during the execution of the mode in which the refrigerant flows through the first dew-proof pipe, the control unit reduces the valve opening degree of the three-way valve to reduce the valve opening degree. 1 The refrigerator according to claim 1, which lowers the temperature of the dew-proof pipe. When the operating frequency of the compressor is equal to or lower than a predetermined value during the execution of the mode in which the refrigerant flows through the first dew-proof pipe, the control unit reduces the valve opening degree of the three-way valve to prevent the first prevention. The refrigerator according to claim 1, which lowers the temperature of the dew pipe. A temperature sensor for detecting the temperature inside the storage chamber cooled by executing the mode in which the refrigerant flows through the first dew-proof pipe is provided.
When the temperature inside the refrigerator detected by the temperature sensor is equal to or lower than the predetermined temperature during the execution of the mode in which the refrigerant flows through the first dew-proof pipe, the control unit reduces the valve opening degree of the three-way valve. The refrigerator according to claim 1, which lowers the temperature of the first dew-proof pipe. The refrigerator according to any one of claims 1 to 4, wherein the dew-proof pipe includes a second dew-proof pipe connected to the upstream side of the three-way valve. 5. The first dew-proof pipe is provided around one front opening of the refrigerating storage chamber and the freezing storage chamber, and the second dew-proof pipe is provided around the other front opening. The refrigerator described in. The refrigerator according to claim 6, wherein the first dew-proof pipe is provided around the front opening of the refrigerating storage chamber, and the second dew-proof pipe is provided around the front opening of the freezing storage chamber. .. The refrigerator according to any one of claims 1 to 5, wherein the dew-proof pipe has a third dew-proof pipe connected to the other side of the first outlet and the second outlet of the three-way valve. Any of claims 1 to 4, wherein the control unit lowers the temperature of the first dew-proof pipe by reducing the valve opening degree of the three-way valve when switching to the mode in which the refrigerant flows through the first dew-proof pipe. The refrigerator according to item 1. Any of claims 1 to 4, wherein the control unit maintains or increases the valve opening degree of the three-way valve when switching to a mode in which the refrigerant flows to the other side of the first outlet and the second outlet of the three-way valve. The refrigerator according to item 1. The first dew-proof pipe is connected to the second outlet of the three-way valve and is provided around the front opening of the refrigerating storage chamber.
Equipped with a humidity sensor that detects the humidity of the installation atmosphere of the refrigerator
When the humidity detected by the humidity sensor is equal to or lower than the predetermined humidity during the execution of the refrigeration mode, the control unit determines the humidity detected by the humidity sensor in the refrigeration mode executed after the end of the refrigeration mode. The refrigerator according to any one of claims 1 to 7, wherein the temperature of the first dew-proof pipe is lowered by reducing the valve opening degree of the three-way valve.

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