CN100494835C - refrigerator - Google Patents

Abstract

An electric refrigerator consists of refrigerating chamber, chilling room, temperature transition chamber, compressor, condenser, the first expansion unit, evaporator of refrigerating chamber, refrigerating circulation of chilling room evaporator and temperature transducer of temperature transition chamber. It is featured as using direct-cooling evaporator as evaporator of refrigerating chamber, setting air dust between chilling room and temperature transition chamber, using regulation unit to regulate cooling air rate flowing to air dust and using control unit to control said regulation unit according to signal from temperature transducer of temperature transition chamber.

Description

refrigerator

technical field

The invention relates to a direct air cooling refrigerator with a temperature-changing chamber.

Background technique

In the existing refrigerator with 3 temperature zones of refrigerator, freezer and variable room, the temperature of the variable room can be adjusted within a certain temperature range. For example, when storing meat and fish, etc., it can be set at about -7°C , and when there is not enough space in the refrigerator or freezer, the temperature in the refrigerator or freezer can be adjusted.

As far as the cooling method is concerned, the commonly used method is the direct cooling type in which the evaporator is arranged at the bottom or side of the storage room, or the wind cooling system in which the three storage rooms share a coil evaporator and circulates the cold air in the storage room through a fan. cold style.

Generally speaking, the refrigeration cycle in a refrigerator includes a compressor, a condenser, an expansion device, an evaporator in a refrigerator, and an evaporator in a freezer.

The refrigerating room generally adopts a direct-cooling evaporator, because the refrigerating room is a frequently used storage room and usually stores foods with a lot of water such as vegetables.

However, when the evaporator is directly configured in the variable greenhouse, it is not perfect in terms of cost and energy saving.

Contents of the invention

The purpose of the present invention is to solve the above-mentioned problems in the prior art. That is, the present invention provides a refrigerator, which has a refrigerator, a freezer, and a temperature-changing room adjacent to the freezer. The refrigeration cycle of the device, the first expansion device, the evaporator in the refrigerating room, and the evaporator in the freezing room, at least a temperature sensor for detecting the temperature in the changing room is provided in the changing room, and it is characterized in that the evaporator in the refrigerating room is a direct cooling type The evaporator is provided with an air duct between the freezing room and the temperature changing room, has a cooling air volume adjustment device for adjusting the inflow of cold air flowing into the air duct, and controls the cooling air volume adjustment based on the signal of the temperature sensor of the temperature changing room. device controls.

The refrigerator of the invention realizes the functions of the refrigerating chamber and the freezing chamber, and also realizes the function of the temperature-changing chamber well through the cold air volume regulating device.

According to the refrigerator of the present invention, its freezer evaporator is an air-cooled evaporator, and the freezer has a freezer air blower for making air flow in the freezer. Therefore, compared with the direct-cooling evaporator of the freezing chamber, the temperature uniformity in the freezing chamber can be improved, and the temperature regulation accuracy of the freezing chamber can be improved.

In the refrigerator of the present invention, the cold air volume regulating device may be a switch device for opening and closing the air duct, or a blower capable of making air flow from the freezing chamber to the temperature-changing chamber through the air duct. In this way, by adjusting the opening and closing state of the switch device or the operation amount of the blower, the amount of cold air flowing into the air duct can be well adjusted, and the temperature of the cooling room and the freezing room can be controlled accordingly.

In addition, when the evaporator of the freezer compartment of the refrigerator of the present invention is an air-cooled evaporator, the above blower can also be used as an air blower for the freezer compartment. In this way, while simplifying the structure of the refrigerator, the effects of the present invention can still be brought into play.

In the refrigerator of the present invention, a temperature sensor for the refrigerator compartment may be provided in the refrigerator compartment, and the control device compensates the operating amount of the cooling air volume adjusting device according to the temperature detected by the temperature sensor for the refrigerator compartment. Specifically, the control device compensates the operation amount of the air blower or compensates the open/close state of the switch device according to the detected temperature of the refrigerating room temperature sensor.

In addition, in the refrigerator of the present invention, a freezer temperature sensor may be provided in the freezer compartment, and the control device may compensate the operating amount of the cooling air volume adjustment device based on the temperature detected by the freezer compartment temperature sensor. Specifically, the control device compensates the operation amount of the air blower or compensates the open and close state of the switch device according to the detected temperature of the freezer compartment temperature sensor.

In the refrigerator of the present invention, the refrigerating cycle is branched from the outlet side of the condenser, has a double path with a second expansion device communicating with the refrigerating chamber evaporator and the freezing chamber evaporator, and has a second expansion device on the outlet side of the condenser through the first expansion device. A three-way valve for switching between the flow path of the device and the flow path passing through the second expansion device, and the control device controls the three-way valve according to the detection temperature of the variable room temperature sensor and the detection temperature of the refrigerating room temperature sensor.

In addition, in the refrigerator of the present invention, there is a refrigerating room temperature sensor in the refrigerating room, and the refrigerating cycle is branched from the outlet side of the condenser, and has a double path with a second expansion device communicating with the refrigerating room evaporator and the freezing room evaporator, On the outlet side of the condenser, there is a three-way valve for switching between the flow path passing through the first expansion device and the flow path passing through the second expansion device. Detect temperature control three-way valve.

In summary, the refrigerator of the present invention not only realizes the functions of the refrigerating room and the freezing room, but also realizes the function of the variable temperature room through various means, and avoids the cost of the existing direct cooling type variable temperature room. Insufficient shortcomings in technology and energy saving.

Description of drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of another embodiment of the present invention.

Fig. 3 is a structural schematic diagram of an embodiment of an example of the present invention provided with a blower.

Fig. 4 is a structural schematic diagram of another embodiment of the present invention provided with a blower.

Fig. 5 is a structural schematic diagram of an embodiment in which the air supply device for the freezing chamber of the present invention doubles as a blower.

Fig. 6 is a structural schematic diagram of an embodiment of the present invention in which a temperature sensor is installed in the refrigerator.

Fig. 7 is a structural schematic diagram of an embodiment of the present invention in which a temperature sensor is installed in the freezing chamber.

Fig. 8 is a schematic diagram of an embodiment of an example of the present invention provided with a three-way valve.

Fig. 9 is a schematic diagram of another embodiment of the present invention provided with a three-way valve.

Symbol Description:

1 cold room; 2 cold room evaporator; 3 variable temperature room; 4 air duct; 11a first expansion device; 11b second expansion device; 12 control device; 13a variable room temperature sensor; 13b refrigerator temperature sensor; 13c freezer temperature sensor; 14 three-way valve; 15 condenser; 16 Blower.

Detailed ways

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Of course, the present invention is not limited to these Examples. In the drawings, corresponding parts are marked with the same numerals, and repeated explanations are omitted.

Figure 1 or 2 is a schematic diagram of an embodiment of the present invention.

As shown in Figure 1 or 2, the refrigerator of the present invention is equipped with a refrigerating chamber 1, a freezing chamber 8, and a temperature-changing chamber 3 adjacent to the freezing chamber, and has a compressor 7, a condenser 15, a first expansion device 11a, and a refrigerating chamber connected in sequence. The cooling cycle of the room evaporator 2 and the freezing room evaporator 6, and at least the temperature changing room temperature sensor 13a for detecting the temperature in the temperature changing room 3 is provided in the temperature changing room 3 . Wherein, the refrigerating room evaporator 2 is a direct-cooling evaporator, and an air channel part 4 is arranged between the freezing room 8 and the variable temperature room 3. Freezer evaporator cover plate 10 is arranged. In addition, the refrigerator of the present invention further includes a cooling air volume adjusting device for adjusting the inflow of cold air flowing into the air duct 4, and a control device 12 for controlling the cooling air volume adjusting device based on the temperature detected by the variable room temperature sensor 13a.

In the refrigerator of the present invention, the temperature adjustment ranges of each storage room are respectively: 10°C to 0°C for the cold room, -18°C to 10°C for the variable temperature room, and -16°C to -26°C for the freezer room.

In addition, as shown in Figure 1 or 2, the freezer evaporator 6 is generally an air-cooled evaporator, and the freezer 8 is provided with a freezer air supply system that allows air to flow between the freezer 8 and the air-cooled evaporator 6. device 5. At this time, compared with the direct cooling evaporator, it can greatly improve the air flow in the freezing chamber 8, so that the inside of the freezing chamber 8 can quickly achieve temperature uniformity and improve the temperature adjustment accuracy of the freezing chamber 8.

In addition, as shown in Figure 2, a switch device for opening and closing the air duct part 4 may also be provided in the air duct part 4, the switch device is associated with the control device 12, and the control device 12 controls its open and closed states , to play a role in controlling the amount of cold air supplied from the freezer compartment 8 to the temperature-changing compartment 3 . That is to say, the cooling air volume regulating device in the refrigerator of the present invention may be a switch device for opening and closing the above-mentioned air duct portion 4 . Specifically, when the temperature of the variable room 3 reaches the set temperature, the control device 12 closes the switch device or reduces the degree of opening (hereinafter referred to as "opening degree"); and when the temperature of the variable room 3 does not reach the set temperature , the control device 12 opens the switch device or increases the temperature or/and time, so that more cold air in the freezing chamber 8 flows into the variable temperature chamber 3 through the air duct part 4, so as to adjust the temperature of the variable temperature chamber 3 as soon as possible. .

In addition, the cooling air volume adjusting device of the present invention may also be a blower 16 that makes air flow from the freezer compartment 8 into the variable temperature compartment 3 through the air duct portion 4 . At this moment, the air blower 16 can be arranged in the air channel part 4, as shown in Figure 3; the air blower 16 can also be arranged on the outlet side of the air channel part 4, as shown in Figure 4, by the air on the outlet side It flows out into the temperature-changing room 3 to cause air flow from the freezing room 8 to the temperature-changing room 3; Room 8 flows to the air in variable room 3. Regardless of the form of the air blower described above, it is associated with the control device 12 and its operation is regulated by the control device 12 to regulate the amount of cold air supplied to the temperature-changing room 3 . Specifically, when the temperature of the variable room 3 reaches the set temperature, the control device 12 reduces the air supply volume of the blower and/or the running time of the blower, or closes the blower; and when the temperature of the variable room 3 does not reach the set temperature At this time, the control device 12 turns on the blower, and increases the air supply volume of the blower and/or increases the running time of the blower, so that more cold air flows from the freezing chamber 8 into the temperature-changing chamber 3, so as to quickly adjust the temperature of the temperature-changing chamber 3 The role of temperature.

Certainly, when the evaporator of the freezing compartment is an air-cooled evaporator, the blower mentioned above can also be used as the air blowing device 5 for the freezing compartment. For example, as shown in FIG. 5 , it is arranged obliquely with respect to the opening of the air duct 4 and the evaporator cover 10 of the freezing chamber, which not only can circulate the air inside the freezing chamber 8, but also flow to the air duct 4 for freezing. Cool air is supplied from the inlet on the chamber side. In this way, the air blower can simultaneously function as the air blower and as the air blower 5 for the freezer compartment, and there is no need to configure another air blower 5. While the effects of the present invention can be obtained, it is also beneficial to reduce costs.

In addition, the refrigerator of the present invention can also be provided with a temperature sensor (refrigerating compartment temperature sensor 13b) in the refrigerating compartment 1, and the control device 12 compensates the operation amount of the above-mentioned cooling air volume regulating device based on the detected temperature of the refrigerating compartment temperature sensor 13b.

Specifically, when the refrigerating room temperature sensor 13b is provided in the refrigerating room 1 and the cooling air volume regulating device is a blower, take the case where the freezing room air supplying device 5 doubles as the cooling air volume regulating blower as an example, and its composition can refer to FIG. 6 . At this time, the control device 12 compensates the operation amount of the blower based on the temperature detected by the refrigerating room temperature sensor 13b while controlling the operation amount of the air blower based on the temperature detected by the variable room temperature sensor 13a. That is to say, when the load of the refrigerating room 1 is high, since the distribution of the refrigerating capacity to the refrigerating room 1 is high, the distribution of the refrigerating capacity to the freezing room 8 is relatively low, and thus the cooling capacity from the freezing room 8 to the freezing room is relatively low. The inflow of cold air into the cooling room 3 is low. At this time, the inflow of cold air from the freezing room 8 to the cooling room 3 is increased by increasing the operation amount of the blower based on the temperature detected by the refrigerating room temperature sensor 13b. On the other hand, when the load of the refrigerating room 1 is low, since the distribution of the refrigerating capacity to the refrigerating room 1 is relatively low, the distribution of the refrigerating capacity to the freezing room 8 is relatively high, and thus the cooling capacity from the freezing room 8 is relatively high. The inflow of cold air into the variable room 3 is too large. At this time, the inflow of cold air from the freezer compartment 8 to the variable room 3 is reduced by reducing the operation amount of the blower based on the temperature detected by the refrigerating room temperature sensor 13b. As a result, when the difference between the actual temperature of the refrigerating room 1 and the set temperature is "high load", by adjusting the operation amount of the blower, it is possible to compensate for the large amount of cooling distributed to the refrigerating room 1, which will affect the cooling effect of the freezer. The temperature of the cooling chamber 3 can be maintained by reducing the cooling amount supplied to the temperature changing chamber 3 due to the small amount of cooling supplied from the chamber 8 . In this way, the temperature adjustment accuracy of the variable room 3 can be improved.

And when the refrigerating room 1 is provided with a refrigerating room temperature sensor 13b, and the cold air volume regulating device is a switch device for opening and closing the air duct portion 4, the control device 12 controls the opening and closing of the switch device according to the temperature detected by the variable room temperature sensor 13a. At the same time as the closed state, the open and closed state of the switch device is compensated based on the detected temperature of the refrigerating compartment temperature sensor 13b. Specifically, when the load of the refrigerating room 1 is high, the distribution of the refrigerating capacity to the freezing room 8 is relatively low due to the high distribution of the cooling capacity to the refrigerating room 1, and thus the transfer from the freezing room 8 to the freezing room 8 is relatively low. The inflow of cold air into variable temperature room 3 is relatively small. At this time, the inflow of cold air from freezer compartment 8 to variable temperature room 3 is increased by increasing the opening degree of the switch device based on the temperature detected by refrigerating room temperature sensor 13b. On the other hand, when the load of the refrigerating room 1 is low, since the distribution of the refrigerating capacity to the refrigerating room 1 is relatively low, the distribution of the refrigerating capacity to the freezing room 8 is relatively high, and thus the cooling capacity from the freezing room 8 is relatively high. The inflow of cold air into the variable temperature room 3 is relatively large. At this time, the inflow of cold air from the freezer compartment 8 to the variable temperature room 3 is reduced by reducing the opening degree of the switch device based on the temperature detected by the refrigerating room temperature sensor 13b. . The effect it achieves is the same as the above-mentioned situation in which the refrigerator compartment temperature sensor 13b is arranged in the refrigerator compartment 1 and the cooling air volume adjustment device is a blower.

In addition, the refrigerator of the present invention may also be provided with a temperature sensor (freezing compartment temperature sensor 13c) in the freezing compartment 8, and the control device 12 compensates the operating amount of the above-mentioned cooling air volume adjustment device based on the detected temperature of the freezing compartment temperature sensor 13c. .

Specifically, when the freezer compartment 8 is provided with a freezer compartment temperature sensor 13c and the cooling air volume adjustment device is a blower, take the freezer compartment air supply device 5 also serving as the blower as an example, its composition can refer to FIG. 7 . The control device 12 controls the operation amount of the air blower based on the temperature detected by the variable room temperature sensor 13a, and compensates the operation amount of the air blower based on the temperature detected by the freezer compartment temperature sensor 13c. That is to say, when the load of the freezer compartment 8 was high, the distribution of the refrigerating capacity to the freezer compartment 8 was high, causing the inflow of cold air from the freezer compartment 8 to the temperature-changing compartment 3 to be high. The detection temperature of the temperature sensor 13c reduces the operation amount of the air blower, and reduces the inflow amount of cold air from the freezer compartment 8 to the cooling room 3 . On the other hand, when the load of the freezer compartment 8 is low, the distribution of the refrigerating capacity to the freezer compartment 8 is relatively low, causing the inflow of cold air from the freezer compartment 8 to the temperature-changing compartment 3 to be relatively small. The temperature detected by the room temperature sensor 13c increases the operation amount of the air blower to increase the inflow of cool air from the freezer compartment 8 to the cooling room 3 . As a result, when the difference between the actual temperature of the freezer compartment 8 and the set temperature is "high load", by adjusting the operation amount of the blower, it is possible to compensate for the large cooling capacity distributed to the freezer compartment 8 and the direction change. The increase of the cooling capacity supplied by the greenhouse 3 can maintain the temperature of the variable chamber 3 . In this way, the temperature adjustment accuracy of the variable room 3 can be improved.

And when the freezer compartment 8 is provided with a freezer compartment temperature sensor 13c, and when the cold air volume regulating device is a switch device, the control device 12 controls the switching state of the switch device according to the temperature detected by the temperature change room temperature sensor 13a, and based on the freezer compartment temperature The detected temperature of the sensor 13c compensates for the switching state of the switching device. That is to say, when the load of the freezer compartment 8 was high, the distribution of the refrigerating capacity to the freezer compartment 8 was high, causing the inflow of cold air from the freezer compartment 8 to the temperature-changing compartment 3 to be high. The detection temperature of the temperature sensor 13c reduces the opening degree of a switchgear, and reduces the inflow amount of cold air from the freezer compartment 8 to the cooling room 3. On the other hand, when the load of the freezer compartment 8 is low, the distribution of the refrigerating capacity to the freezer compartment 8 is relatively low, causing the inflow of cold air from the freezer compartment 8 to the temperature-changing compartment 3 to be relatively small. The opening degree of the switchgear is increased according to the detected temperature of the room temperature sensor 13c, and the inflow of cold air from the freezing room 8 to the cooling room 3 is increased. As a result, when the difference between the actual temperature of the freezer compartment 8 and the set temperature is relatively large under the "high load" situation, by adjusting the switch state of the switch device, it is possible to compensate for the large cooling capacity distributed to the freezer compartment 8. The increase of the cooling capacity supplied by the variable room 3 can maintain the temperature of the variable room 3 . In this way, the temperature adjustment accuracy of the variable room 3 can be improved.

The refrigerator of the present invention can also adopt the embodiment shown in Fig. 8 or 9 . That is to say, on the basis of the above-mentioned structure, the refrigeration cycle can be further branched from the outlet side of the condenser 15, and has a second expansion device 11b communicating with the refrigerating chamber evaporator 2 and the freezing chamber evaporator 6. has a three-way valve 14 for switching between the flow path passing through the first expansion device 11 a and the flow path passing through the second expansion device 11 b on the outlet side of the condenser 15 . At this time, the control device 12 controls the three-way valve 14 based on the temperature detected by the variable room temperature sensor 13a. Specifically, when the temperature difference between the actual temperature of the variable room 3 and the set temperature is small (the variable temperature room is in a low-load state), the cooling requirement of the refrigerating room 1 is given priority, and the refrigeration cycle is shown in Figure 8; When the temperature difference between the actual temperature of the greenhouse 3 and the set temperature is large (the temperature-changing room is in a high-load state), the refrigeration requirement of the temperature-changing room 3 is satisfied first, and the refrigeration cycle is shown in FIG. 9 . The dotted arrow direction in Fig. 8 and Fig. 9 indicates the circulation direction of the refrigerant.

Of course, in the embodiment shown in FIG. 8 or 9 , the refrigerator compartment 1 may also have a refrigerator compartment temperature sensor 13b. And the control apparatus 12 controls a three-way valve based on the detection temperature of the variable room temperature sensor 13a, and the detection temperature of the refrigerating room temperature sensor 13b. Specifically, the control device 12 first confirms the load state of the refrigerating room 1, and when the temperature difference between the actual temperature of the refrigerating room 1 and the set temperature is large (the refrigerating room 1 is in a high-load state), it will give priority to satisfying the load status of the refrigerating room 1. Refrigeration requirements, ignoring the cooling requirements of the temperature-changing room 3, the refrigeration cycle is shown in Figure 8; and when the temperature difference between the actual temperature of the refrigerating room 1 and the set temperature is small (the refrigerating room 1 is not in a high-load state), and the temperature-changing room When the temperature difference between the actual temperature of 3 and the set temperature is large (the temperature-changing room 3 is in a high-load state), the control device 12 will ignore the cooling requirement of the refrigerating room 1, and give priority to satisfying the cooling requirement of the temperature-changing room 3. The refrigeration cycle is shown in Figure 9 shown.

In this way, the refrigerator of the present invention can rationally distribute the cooling capacity among the various storage chambers according to the purpose of the user, and can precisely control the temperature of each storage chamber at the same time.

As mentioned above, the present invention provides a kind of air direct cooling refrigerator, which not only realizes the function of good refrigerating room and freezing room, but also realizes the function of variable temperature room well, avoids the existing direct cooling type at the same time The shortcomings of variable greenhouses are not perfect in terms of cost and energy conservation.

Obviously, besides the above-mentioned embodiments, the present invention can also have other embodiments. All technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims (10)

1. A refrigerator, Equipped with a refrigerator room, a freezer room, and a temperature-changing room adjacent to the freezer room, It has a refrigeration cycle that sequentially connects a compressor, a condenser, a first expansion device, a refrigerating chamber evaporator, and a freezing chamber evaporator, at least a variable temperature room temperature sensor for detecting the temperature inside the variable temperature room is provided in the variable temperature room, It is characterized in that, The evaporator in the cold room is a direct cooling evaporator, An air duct is provided between the freezer compartment and the variable temperature compartment, having a cooling air volume adjusting device that adjusts the inflow of the cooling air flowing into the air duct portion, It also has a control device for controlling the cooling air volume adjustment device based on the signal of the variable room temperature sensor, The refrigerating chamber has a refrigerating chamber temperature sensor, The control device compensates the operation amount of the cooling air volume adjustment device based on the detected temperature of the refrigerating compartment temperature sensor. 2. The refrigerator according to claim 1, characterized in that, The freezer evaporator is an air-cooled evaporator, The freezer compartment is provided with a freezer compartment air supply device for flowing air in the freezer compartment. 3. The refrigerator according to claim 1 or 2, characterized in that, The cold air volume adjustment device is a switch device that opens and closes the air duct portion, and the control device compensates for an open and closed state of the switch device based on a temperature detected by the refrigerating room temperature sensor. 4. The refrigerator according to claim 1 or 2, characterized in that, The cold air volume adjustment device is a blower that sends air from the freezer to the temperature-changing room through the air duct, and the control device compensates the operation amount of the blower based on the temperature detected by the temperature sensor of the refrigerating room. . 5. The refrigerator according to claim 4, characterized in that, The freezer evaporator is an air-cooled evaporator, The blower also serves as a freezer compartment air blower for moving air in the freezer compartment. 6. A refrigerator, Equipped with a refrigerator room, a freezer room, and a temperature-changing room adjacent to the freezer room, It has a refrigeration cycle that sequentially connects a compressor, a condenser, a first expansion device, a refrigerating chamber evaporator, and a freezing chamber evaporator, at least a variable temperature room temperature sensor for detecting the temperature inside the variable temperature room is provided in the variable temperature room, It is characterized in that, The evaporator in the cold room is a direct cooling evaporator, An air duct is provided between the freezer compartment and the variable temperature compartment, having a cooling air volume adjusting device that adjusts the inflow of the cooling air flowing into the air duct portion, It also has a control device for controlling the cooling air volume adjustment device based on the signal of the variable room temperature sensor, There is a freezer temperature sensor in the freezer, The control device compensates the operating amount of the cooling air volume adjustment device based on the detected temperature of the freezing compartment temperature sensor. 7. The refrigerator according to claim 6, characterized in that, The cooling air volume adjustment device is a blower that sends air from the freezer compartment to the variable temperature room through the air duct, and the control device compensates the operation amount of the blower based on the detected temperature of the freezer compartment temperature sensor. . 8. The refrigerator according to claim 6, characterized in that, The cold air volume adjustment device is a switch device that opens and closes the air duct portion, and the control device compensates for an open and closed state of the switch device based on a temperature detected by the freezer compartment temperature sensor. 9. The refrigerator according to claim 1 or 6, characterized in that, the refrigeration cycle is branched from the condenser outlet side, having a dual passage with a second expansion device in communication with the refrigerating compartment evaporator and the freezing compartment evaporator, having a three-way valve switching between a flow path through the first expansion device and a flow path through the second expansion device on the outlet side of the condenser, The control device controls the three-way valve according to the temperature detected by the variable room temperature sensor. 10. The refrigerator according to claim 1 or 6, characterized in that, The refrigerating chamber has a refrigerating chamber temperature sensor, the refrigeration cycle is branched from the outlet side of the condenser, having a dual passage with a second expansion device in communication with the refrigerating compartment evaporator and the freezing compartment evaporator, having a three-way valve switching between a flow path through the first expansion device and a flow path through the second expansion device on the outlet side of the condenser, The control device controls the three-way valve according to the detection temperature of the variable room temperature sensor and the detection temperature of the refrigerating room temperature sensor.

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