WO2018025301A1

WO2018025301A1 - Refrigerator-freezer

Info

Publication number: WO2018025301A1
Application number: PCT/JP2016/072477
Authority: WO
Inventors: 大石　隆; 拓也児玉
Original assignee: 三菱電機株式会社
Priority date: 2016-08-01
Filing date: 2016-08-01
Publication date: 2018-02-08
Also published as: CN208541805U; JP6615354B2; JPWO2018025301A1

Abstract

In conventional refrigerator-freezers, as a means for heating the inside of the freezer such as a vegetable compartment, a heater is installed on the side wall, floor and the like in the compartment, or a condenstation attachment preventing pipe or the like on the high pressure side of the refrigerant circuit is disposed in the compartment. The present invention addresses the problem of the need of electric power for the heater, the inability of the high pressure-side pipe to provide heating when the compressor is stopped, and an increase in electric power consumption when the means for heating the inside of the freezer is utilized, and provides a refrigerator-freezer which is capable of heating the inside of a compartment without requiring power to be supplied to a heater, the compressor and the like, and thereby decreasing electric power consumption.

Description

Freezer refrigerator

This invention relates to the refrigerator-freezer which has the heating structure in the store | warehouse | chamber using external air.

Some freezer refrigerators have multiple rooms with different temperature zones, such as refrigerator rooms, vegetable rooms, and freezer rooms. In such a refrigerator, in order to prevent freezing of vegetables due to being too cold, a heating device such as a heater for heating the inside of the refrigerator is provided. It is preventing.

For example, in Patent Document 1, a vegetable room heating pipe is disposed in the vegetable room in order to prevent the vegetable room temperature from dropping below a set temperature. When the vegetable room temperature falls below a predetermined value, a high pressure is applied to the vegetable room heating pipe. A refrigerator in which a two-phase refrigerant is flowed and heated by condensation heat is disclosed.

Moreover, in patent document 2, a heating heater is installed in the bottom and part of the back of a vegetable room, and it heats by the temperature detected with the temperature sensor only for the vegetable room and the room temperature sensor with which the operation panel of the refrigerator door was equipped. A refrigerator that controls the energization rate to the heater is disclosed.

In a conventional refrigerator, as a means of heating the vegetable compartment, etc., a heater is provided on the indoor side wall and partition plate, etc., or a dew prevention pipe etc. of the high temperature part on the high pressure side of the refrigerant circuit is provided in the vegetable compartment etc. It corresponded with.

Japanese Patent Laid-Open No. 2015-218938 JP 2008-70041 A

However, since the heater requires electric power, the power consumption increases when a means for heating the inside of the cabinet is used. On the other hand, in the configuration in which heating is performed with the high-temperature side high-temperature pipe, heating cannot be performed when the compressor is stopped.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a refrigerator-freezer that can heat the interior without requiring input power.

A refrigerator-freezer according to the present invention includes a main body having a storage chamber, and a refrigerant circuit that cools the storage chamber. The refrigerant circuit is connected to a compressor that compresses the refrigerant, and to a discharge side of the compressor. A condenser, a decompressor connected to the condenser, an evaporator connected to the decompressor, and a pipe connecting the evaporator and the compressor. A suction pipe disposed on the wall of the chamber, a heat exchanger connected in parallel to the compressor side pipe of the suction pipe, and provided at a branch position between the suction pipe and the heat exchanger. A first switching device for switching between a first flow path to which the evaporator and the compressor side pipe are connected, and a second flow path to which the evaporator and the heat exchanger are connected; It is to be prepared.

According to the refrigerator-freezer of the present invention, when the compressor is stopped, the flow path is switched by the switching device, and the refrigerant in the heat exchanger is heated by the outside air and flows into the pipe, so that the two-phase refrigerant in the pipe is overheated. It becomes steam and raises the pipe temperature on the evaporator side of the suction pipe. Accordingly, the storage chamber is heated by the heat of the outside air transported by the refrigerant without using electric power such as a heater or a compressor.

It is a block diagram which shows the external appearance of the refrigerator-freezer which concerns on Embodiment 1 of this invention. It is a schematic block diagram which shows the inside of the refrigerator-freezer which concerns on Embodiment 1 of this invention. It is a refrigerant circuit diagram of the conventional refrigerator-freezer. It is a refrigerant circuit diagram of the refrigerator-freezer according to Embodiment 1 of the present invention. It is a schematic diagram which shows an example of the machine room of the refrigerator-freezer which concerns on Embodiment 1 of this invention. It is a refrigerant circuit diagram of the refrigerator-freezer according to Embodiment 2 of the present invention. It is a refrigerant circuit figure of the refrigerator-freezer which concerns on Embodiment 3 of this invention.

Embodiment 1 FIG.
Based on FIG.1 and FIG.2, the structure of a refrigerator-freezer is demonstrated. FIG. 1 is a configuration diagram showing the appearance of the refrigerator-freezer according to Embodiment 1 of the present invention. FIG. 2 is a schematic configuration diagram showing the inside of the refrigerator-freezer according to Embodiment 1 of the present invention.

FIG. 2 shows the inside of the main body when the door of the refrigerator 100 is removed. In the main body 99 of the refrigerator 100, a plurality of storage rooms for storing food such as a refrigerator room 51, an ice making room 52, a switching room 53, a vegetable room 54, and a freezing room 55 are provided from above. Each storage room has a different temperature zone, and as shown in FIG. 2, adjacent storage rooms are partitioned by a heat insulating partition wall 56. Each storage room is provided with a temperature sensor such as a thermistor, and each device of the refrigerator 100 is controlled so that the temperature detected by the temperature sensor in each storage room becomes the target temperature.

Hereinafter, the case where the storage room to be heated is, for example, the vegetable room 54 having a lower temperature range than the other storage rooms will be described. As shown in FIG. 2, a part of the refrigerant pipe (the pipe 9 a on the evaporator side of the suction pipe) is disposed on the bottom surface of the vegetable compartment 54 to heat the vegetable compartment 54.

The refrigerator-freezer 100 includes a refrigerant circuit 30 that cools a plurality of storage rooms. The refrigerant circuit 30 of the refrigerator / freezer 100 will be described with reference to FIGS. FIG. 3 is a refrigerant circuit diagram of a conventional refrigerator-freezer. FIG. 4 is a refrigerant circuit diagram of the refrigerator-freezer according to Embodiment 1 of the present invention. FIG. 5 is a schematic diagram showing an example of a machine room of the refrigerator-freezer according to Embodiment 1 of the present invention.

Generally, a refrigerator-freezer has a basic configuration of a refrigerant circuit shown in FIG. Specifically, the compressor 1, the condenser 2, the decompression device 3, and the evaporator 4 are connected to the refrigerant circuit via a pipe.

As shown in FIG. 4, the refrigerant circuit 30 in the refrigerator / freezer 100 includes a compressor 1, a condenser 2 connected to the discharge side of the compressor 1, a decompression device 3 connected to the condenser 2, and a decompression An evaporator 4 connected to the device 3 and a suction pipe 9 connecting the evaporator 4 and the compressor 1 are provided. The refrigerant circuit 30 includes a heat exchanger 8 connected in parallel to the compressor side pipe 9b of the suction pipe 9, and a first switching device 5 provided at a branch position between the suction pipe 9 and the heat exchanger 8. And a second switching device 6 provided at a joining position of the heat exchanger 8 and the suction pipe 9. The heat exchanger 8 is connected to the first switching device 5 and the second switching device 6 via pipes 11 respectively.

The compressor 1 compresses, discharges and circulates the refrigerant. The condenser 2 is composed of, for example, a heat radiating pipe, and condenses and liquefies the refrigerant compressed by the compressor 1. Further, as shown in FIG. 5, a machine room 60 is provided on the lower back side of the main body 99 of the refrigerator refrigerator 100 in addition to the plurality of storage rooms. The compressor 1 and the condenser 2 are disposed in the machine room 60. In addition, a machine room fan 61 is installed in the machine room 60, and is controlled so that the temperature of the machine room 60 does not become too high due to heat released from the compressor 1 or the like. When the refrigerator 100 is used, a machine room cover is usually attached to the machine room 60 so that the machine room 60 cannot be seen from the outside. The machine room cover is provided with a number of air holes, and the machine room fan 61 takes outside air into the machine room through the air holes, passes the inside of the machine room 60, and discharges it to the outside.

The decompression device 3 is composed of, for example, a throttle pipe and decompresses the refrigerant liquefied by the condenser 2. The evaporator 4 evaporates the refrigerant decompressed by the decompression device 3. The evaporator 4 cools the air in the refrigerator-freezer 100 by the endothermic effect when evaporated. In addition, a cooling chamber is formed inside the refrigerator refrigerator 100, and the evaporator 4 is disposed in the cooling chamber. The air cooled by the evaporator 4 is sent to each storage room through an air passage formed in the refrigerator 100 by a blower fan and a damper device.

The pipe 9 a on the evaporator side of the suction pipe 9 is arranged on the wall surface of the vegetable compartment 54. The wall surface of the vegetable compartment 54 provided with the evaporator-side piping 9 a is, for example, the side surface of the vegetable compartment 54 constituted by the main body wall surface of the refrigerator-freezer 100, the top surface or the bottom surface of the vegetable compartment 54 constituted by the heat insulating partition wall 56. It is. The evaporator-side piping 9a may be arranged over a plurality of wall surfaces, or may be arranged on one wall surface as shown in FIG.

The heat exchanger 8 exchanges heat with the outside air. In FIG. 5, the heat exchanger 8 is installed in the machine room 60, and performs heat exchange between the refrigerant and the ambient air.

The first switching device 5 and the second switching device 6 are each composed of a three-way valve or a plurality of two-way valves. One port of the three-way valve of the first switching device 5 is connected to the evaporator side pipe 9a of the suction pipe 9, and one of the remaining two ports is connected to the compressor side pipe 9b of the suction pipe 9, The other of the remaining two ports is connected to the pipe 11. One of the three-way valves of the second switching device 6 is connected to the compressor 1, one of the remaining two ports is connected to the compressor-side pipe 9 b of the suction pipe 9, and the other of the remaining two ports is the other It is connected to the pipe 11. The first switching device 5 switches the connection state, whereby the first flow path F1 to which the evaporator 4 and the compressor side pipe 9b are connected, and the evaporator 4 and the heat exchanger 8 are connected to each other. Switch between two flow paths F2. In addition, the second switching device 6 switches the connection state, whereby a flow path to which the compressor side piping 9b and the compressor 1 are connected, and a flow path to which the heat exchanger 8 and the compressor 1 are connected, Switch.

Moreover, the refrigerator-freezer 100 is provided with the control apparatus 50 as FIG. 4 shows. The control device 50 is composed of, for example, a control board and acquires a signal including operation information indicating whether the compressor 1 is operating or stopped. The control device 50 controls the first switching device 5 and the second switching device 6 based on the obtained operation information of the compressor 1.

Next, the operation of the refrigerator 100 and the refrigerant flow will be described with reference to FIG. When the compressor 1 is in operation, the control device 50 places the first switching device 5 in the state of the first flow path F1, and places the second switching device 6 in a state where the compressor side pipe 9b and the compressor 1 are connected. ing. That is, the refrigerant discharged from the compressor 1 sequentially passes through the condenser 2, the decompression device 3, and the evaporator 4, is sucked into the compressor 1 through the suction pipe 9, and circulates through the refrigerant circuit 30. In the figure, the flow direction 7 of the refrigerant during operation of the compressor 1 is indicated by an arrow.

When the compressor 1 stops, the control device 50 switches the first switching device 5 to the second flow path F2 and switches the second switching device 6 to a state in which the heat exchanger 8 and the compressor 1 are connected. That is, the flow path is in a state where the evaporator 4, the heat exchanger 8, and the compressor 1 are connected. When the second flow path F2 is opened by the control device 50, the refrigerant accumulated in the heat exchanger 8 is heated by the outside air, and becomes superheated steam from the gas-liquid two-phase state. The superheated steam transports heat in the direction of the evaporator 4 that is cooler than the outside air. Specifically, an evaporator-side pipe 9a provided between the evaporator 4 and the first switching device 5 and disposed in the vegetable compartment 54 is heated by heat taken from outside air, and the heated evaporator The vegetable compartment 54 is warmed by the side pipe 9a. Further, the refrigerant that has become superheated steam changes from the two-phase region to the liquid-phase region in the vegetable compartment 54 and returns to the heat exchanger 8. Such a process is repeated, and the refrigerant efficiently transfers the heat of the outside air to the vegetable compartment 54. The heat exchanger 8 and the compressor 1 are connected when the compressor 1 is stopped, but the refrigerant does not flow from the compressor 1 to the condenser side.

In the first embodiment, the refrigerator-freezer 100 includes a main body 99 having a storage room (vegetable room 54), and a refrigerant circuit 30 that cools the storage room. The refrigerant circuit 30 includes the compressor 1 that compresses the refrigerant, and The condenser 2 connected to the discharge side of the compressor 1, the decompression device 3 connected to the condenser 2, the evaporator 4 connected to the decompression device 3, and the evaporator 4 and the compressor 1 are connected. A heat exchanger 8 that is connected in parallel to a suction pipe 9 having an evaporator-side pipe 9a disposed on the wall surface of the storage chamber and a compressor-side pipe 9b of the suction pipe 9, and exchanges heat with outside air. A first flow path F1 provided at a branch position between the suction pipe 9 and the heat exchanger 8 and connected to the evaporator 4 and the pipe 9b on the compressor side, and the evaporator 4 and the heat exchanger 8 And a first switching device 5 that switches the second flow path F2 to be connected.

Thus, in a state where the second flow path F2 is opened, the refrigerant on the low pressure side of the refrigerant circuit 30 is heated by the outside air, and is transported to the vegetable compartment 54 as superheated steam. Therefore, unlike the conventional configuration in which the high pressure side of the heater or refrigerant circuit is used to heat the storage room such as the vegetable room, it is not necessary to start the compressor 1 or to energize the heater. Therefore, the power consumption of the refrigerator-freezer 100 can be reduced.

The refrigerator-freezer 100 further includes a control device 50 that controls the first switching device 5 so that the second flow path F2 is reached when the compressor 1 is stopped. Thereby, when the compressor 1 stops, the flow path of a refrigerant | coolant is automatically switched by the control apparatus 50, and the storage chamber of heating object is heated. Therefore, the refrigerator-freezer 100 can perform heat transport from the outside air to the vegetable compartment 54 using the refrigerant when the compressor 1 is not in operation.

The main body 99 of the refrigerator / freezer 100 is provided with a plurality of storage rooms (refrigeration room 51, ice making room 52, switching room 53, vegetable room 54, freezing room 55, etc.) having different temperature zones, and a plurality of refrigerant circuits 30 are provided. The evaporator-side pipe 9a of the suction pipe 9 is disposed on the wall surface of the storage room (vegetable room 54) having a high temperature zone among the plurality of storage rooms.

As a result, the refrigerator-freezer 100 can cool the inside of the cabinet by the evaporator 4 when the compressor 1 is operating, and can heat the vegetable compartment 54 via the evaporator-side piping 9a when the compressor 1 is stopped. Can be adjusted to a temperature suitable for the setting.

The main body 99 further has a machine room 60, and the heat exchanger 8 is installed in the machine room 60. Thereby, the heat exchanger 8 can exchange heat with the ambient air of the machine room 60. Therefore, when the heat radiation from the compressor 1 or the like during the operation of the compressor 1 remains in the machine room 60, the vegetable room 54 can be used for heating.

Embodiment 2. FIG.
FIG. 6 is a refrigerant circuit diagram of the refrigerator-freezer according to Embodiment 2 of the present invention. In the second embodiment, the refrigerant circuit 130 further includes a reservoir 12 upstream of the heat exchanger 8. Note that the basic configuration of the refrigerator-freezer 100 is the same as that of the first embodiment, and portions having the same configuration are denoted by the same reference numerals and description thereof is omitted.

The reservoir 12 is a tank that temporarily stores the refrigerant. The reservoir 12 is provided in the refrigerant circuit 130 between the branch position where the first switching device 5 is provided and the heat exchanger 8.

During the operation of the compressor 1, the control device 50 sets the first switching device 5 to the first flow path F1, and the second switching device 6 is in a state where the compressor-side pipe 9b and the compressor 1 are connected. . When the compressor 1 stops, the control device 50 switches the first switching device 5 to the second flow path F2, and puts the second switching device 6 in a state where the heat exchanger 8 and the compressor 1 are connected. That is, the flow path is in a state where the evaporator 4, the reservoir 12, the heat exchanger 8, and the compressor 1 are connected. When the second flow path F2 is opened by the control device 50, the refrigerant accumulated in the heat exchanger 8 is heated by the outside air, and becomes superheated steam from the gas-liquid two-phase state. The superheated steam transports heat in the direction of the evaporator 4 that is cooler than the outside air. Specifically, the pipe 9a on the evaporator side of the suction pipe 9 is heated by the heat taken in from the outside air, and the vegetable compartment 54 is warmed by the pipe 9a on the evaporator side that is heated. At this time, the superheated steam also heats the refrigerant stored in the reservoir 12. Therefore, the amount of superheated steam is increased and the heat capacity to be transported is increased. The refrigerant that has become superheated steam changes from the two-phase region to the liquid-phase region in the vegetable compartment 54 and returns to the heat exchanger 8. By repeating such steps, the refrigerant efficiently transports the heat of the outside air to the vegetable compartment 54.

In Embodiment 2, the refrigerator-freezer 100 includes a main body 99 having a storage room (vegetable room 54) and a refrigerant circuit 130 that cools the storage room, and the refrigerant circuit 130 includes the compressor 1 that compresses refrigerant. The condenser 2 connected to the discharge side of the compressor 1, the decompression device 3 connected to the condenser 2, the evaporator 4 connected to the decompression device 3, and the evaporator 4 and the compressor 1 are connected. A heat exchanger 8 that is connected in parallel to a suction pipe 9 having an evaporator-side pipe 9a disposed on the wall surface of the storage chamber and a compressor-side pipe 9b of the suction pipe 9, and exchanges heat with outside air. A first flow path F1 provided at a branch position between the suction pipe 9 and the heat exchanger 8 and connected to the evaporator 4 and the pipe 9a on the compressor side, and the evaporator 4 and the heat exchanger 8 And a first switching device 5 that switches the second flow path F2 to be connected.

Thus, in the second embodiment, as in the first embodiment, in the state where the second flow path F2 is open, the refrigerant on the low pressure side of the refrigerant circuit 130 is heated by the outside air, and the superheated steam Become heat transport. Thus, since the electric power for heating a storage room is unnecessary, the power consumption of the refrigerator-freezer 100 can be reduced.

The refrigerant circuit 130 further includes a reservoir 12 that is provided between the first switching device 5 and the heat exchanger 8 and stores the refrigerant. Thereby, the capacity | capacitance of heat transport increases by using the refrigerant | coolant stored in the reservoir | reserver 12, and the refrigerator-freezer 100 can heat the vegetable compartment 54 efficiently.

Embodiment 3 FIG.
FIG. 7 is a refrigerant circuit diagram of the refrigerator-freezer according to Embodiment 3 of the present invention. In the third embodiment, the refrigerant circuit 230 further includes a bypass switching device 13 and a bypass pipe 14. Note that the basic configuration of the refrigerator-freezer 100 is the same as that of the first embodiment, and portions having the same configuration are denoted by the same reference numerals and description thereof is omitted.

One end of the bypass pipe 14 is connected to a pipe between the decompression device 3 and the evaporator 4. The other side of the bypass pipe 14 is connected to a pipe 11 between the branch position where the first switching device 5 is provided and the heat exchanger 8.

The bypass switching device 13 is composed of, for example, a three-way valve or a plurality of two-way valves, and one of the three-way valves is connected to one of the bypass pipes 14 and one of the remaining two ports is the decompression device 3. The other of the remaining two ports is connected to the evaporator 4. The bypass switching device 13 includes a third flow path F3 to which the decompression device 3 and the evaporator 4 are connected, and a fourth flow path F4 to which the decompression device 3 and the heat exchanger 8 are connected via a bypass pipe. Switch.

The control device 250 acquires a signal including operation information indicating whether the compressor 1 is operating or stopped, and based on the acquired operation information of the compressor 1, the first switching device 5 and the second switching device. The device 6 and the bypass switching device 13 are controlled.

When the compressor 1 is in operation, the control device 250 sets the bypass switching device 13 to the third flow path F3, the first switching device 5 to the first flow path F1, and the second switching device 6 to the compressor-side piping 9b. The compressor 1 is connected. That is, in the refrigerant circuit 230, the refrigerant returns to the compressor 1 through the compressor 1, the condenser 2, the decompression device 3, the evaporator 4, and the suction pipe 9 in order.

When the compressor 1 stops, the control device 250 switches the bypass switching device 13 to the fourth flow path F4. The refrigerant moves to the heat exchanger 8 via the bypass pipe 14 due to the high / low pressure difference in the refrigerant pipe. Further, the control device 250 switches the first switching device 5 to the second flow path F2 and puts the second switching device 6 in a state where the heat exchanger 8 and the compressor 1 are connected.

When the second flow path F2 is opened by the control device 250, the refrigerant accumulated in the heat exchanger 8 is heated by the outside air, and becomes superheated steam from the gas-liquid two-phase state. The superheated steam transports heat in the direction of the evaporator 4 that is cooler than the outside air. Specifically, the pipe 9a on the evaporator side of the suction pipe 9 is heated by the heat taken in from the outside air, and the vegetable compartment 54 is warmed by the pipe 9a on the evaporator side that is heated. At this time, the refrigerant upstream of the evaporator 4 moves to the heat exchanger 8 through the bypass pipe 14. Therefore, the amount of superheated steam is increased and the heat capacity to be transported is increased. The refrigerant that has become superheated steam changes from the two-phase region to the liquid-phase region in the vegetable compartment 54 and returns to the heat exchanger 8. Such a process is repeated, and the refrigerant efficiently transports the heat of the outside air to the vegetable compartment 54.

In Embodiment 3, the refrigerator-freezer 100 includes a main body 99 having a storage room (vegetable room 54) and a refrigerant circuit 230 that cools the storage room, and the refrigerant circuit 230 includes the compressor 1 that compresses the refrigerant, and The condenser 2 connected to the discharge side of the compressor 1, the decompression device 3 connected to the condenser 2, the evaporator 4 connected to the decompression device 3, and the evaporator 4 and the compressor 1 are connected. A heat exchanger 8 that is connected in parallel to a suction pipe 9 having an evaporator-side pipe 9a disposed on the wall surface of the storage chamber and a compressor-side pipe 9b of the suction pipe 9, and exchanges heat with outside air. A first flow path F1 provided at a branch position between the suction pipe 9 and the heat exchanger 8 and connected to the evaporator 4 and the pipe 9a on the compressor side, and the evaporator 4 and the heat exchanger 8 And a first switching device 5 that switches the second flow path F2 to be connected.

Thus, in the third embodiment, as in the first embodiment, in the state where the second flow path F2 is open, the refrigerant on the low pressure side of the refrigerant circuit 230 is heated by the outside air, and the superheated steam Become heat transport. Thus, since the electric power for heating a storage room is unnecessary, the power consumption of the refrigerator-freezer 100 can be reduced.

Further, the refrigerant circuit 230 is further connected to a pipe between the decompression device 3 and the evaporator 4, and the other is a bypass pipe connected to the pipe 11 between the first switching device 5 and the heat exchanger 8. 14 and a third flow path F3 provided on one side of the bypass pipe 14 to which the decompression device 3 and the evaporator 4 are connected, and the decompression device 3 and the heat exchanger 8 are connected via the bypass pipe 14. And a bypass switching device 13 for switching the fourth flow path F4.

Thereby, when the fourth flow path F4 is opened, the refrigerant upstream of the evaporator 4 moves to the heat exchanger 8 due to the high-low pressure difference in the pipe. Therefore, since the refrigerator-freezer 100 can use the refrigerant | coolant which moved to the heat exchanger 8 for heat transport in addition to the refrigerant | coolant of the heat exchanger 8, storage rooms, such as the vegetable compartment 54, can be heated efficiently.

In addition, when the compressor 1 is stopped, the bypass switching device 13 is controlled so as to become the fourth flow path F4, and the control device 250 that controls the first switching device 5 so as to become the second flow path F2 is further provided. . Thereby, when the compressor 1 stops, the flow path of a refrigerant | coolant is automatically switched by the control apparatus 250, and the vegetable compartment 54 is heated. Therefore, when the compressor 1 is not in operation, heat transfer from the outside air to the vegetable compartment 54 can be performed using the low-pressure side refrigerant.

The embodiment of the present invention is not limited to the above embodiment, and various changes can be made. For example, although the case where the second switching device 6 connects the heat exchanger 8 and the compressor 1 after the compressor 1 is stopped has been described, the present invention is not particularly limited thereto. It is only necessary to secure a flow path through which heat is efficiently transferred to the evaporator-side pipe 9a while the compressor 1 is stopped. For example, the second switching device 6 connects the compressor side pipe 9b and the compressor 1 during the operation of the compressor 1, and when the compressor 1 is stopped, either the compressor side pipe 9b or the heat exchanger 8 is connected. Also, the configuration may be such that it is closed so as not to be connected to the compressor 1.

Moreover, although the case where the refrigerator-freezer 100 has a plurality of storage rooms has been described, it may include a single storage room. In such a refrigerator-freezer 100, the temperature in the storage chamber is adjusted to the target temperature by cooling by the evaporator 4 and heating when the compressor 1 is stopped.

Further, the

control devices

50 and 250 may end the heating of the storage chamber based on the detected temperature of the temperature sensor provided in the storage chamber to be heated, for example. Specifically, when the temperature of the storage chamber reaches the target temperature, the

control devices

50 and 250 return the first switching device 5, the second switching device 6, and the bypass switching device 13 to the connection state during the operation of the compressor 1, Prepare for the next operation.

1 compressor, 2 condenser, 3 decompressor, 4 evaporator, 5 first switching device, 6 second switching device, 7 refrigerant flow direction, 8 heat exchanger, 9 suction piping, 9a piping on the evaporator side, 9b Compressor side piping, 11 piping, 12 reservoir, 13 bypass switching device, 14 bypass piping, 30, 130, 230 refrigerant circuit, 50, 250 control device, 51 refrigeration room, 52 ice making room, 53 switching room, 54 vegetables Room, 55 freezer room, 56 heat insulation partition wall, 60 machine room, 61 machine room fan, 99 body, 100 freezer refrigerator, F1 first flow path, F2 second flow path, F3 third flow path, F4 fourth flow path .

Claims

A body having a storage chamber;
A refrigerant circuit for cooling the storage chamber,
The refrigerant circuit is
A compressor for compressing the refrigerant;
A condenser connected to the discharge side of the compressor;
A pressure reducing device connected to the condenser;
An evaporator connected to the decompression device;
A pipe connecting the evaporator and the compressor, a pipe on the evaporator side is disposed on the wall surface of the storage chamber;
A heat exchanger connected in parallel to the compressor side pipe of the suction pipe, and for exchanging heat with the outside air;
A first flow path provided at a branch position between the suction pipe and the heat exchanger, to which the evaporator and the pipe on the compressor side are connected, and the evaporator and the heat exchanger are connected. A freezing refrigerator comprising: a first switching device that switches between the second flow path.
The refrigerator-freezer according to claim 1, further comprising a control device that controls the first switching device so as to be the second flow path when the compressor is stopped.
The refrigerant circuit further includes:
The refrigerator-freezer of Claim 1 or 2 provided with the reservoir | reserver which is provided between the said 1st switching device and the said heat exchanger, and stores the said refrigerant | coolant.
The refrigerant circuit further includes:
One bypass pipe connected to the pipe between the decompression device and the evaporator, the other connected to the pipe between the first switching device and the heat exchanger;
A fourth flow path provided on the one side of the bypass pipe and connected to the decompressor and the evaporator, and a fourth flow path connected to the decompressor and the heat exchanger via the bypass pipe. The refrigerator-freezer of Claim 1 provided with the bypass switching apparatus which switches a path | route.
5. The control device further controls the bypass switching device so as to be the fourth flow path when the compressor is stopped, and controls the first switching device so as to be the second flow path. The refrigerator-freezer as described.
The main body is provided with a plurality of storage rooms with different temperature zones,
The refrigerant circuit cools the plurality of storage chambers,
The refrigerator-freezer according to any one of claims 1 to 5, wherein a pipe on the evaporator side of the suction pipe is disposed on a wall surface of a storage room having a high temperature zone among the plurality of storage rooms.
The main body further has a machine room,
The refrigerator-freezer according to any one of claims 1 to 6, wherein the heat exchanger is installed in the machine room.