CN218495512U - Refrigerating and freezing device - Google Patents

Abstract

The utility model relates to a cold-stored refrigeration device, it includes: a cabinet defining therein a temperature-variable compartment for storing articles, the temperature-variable compartment being selectively used as a refrigerating compartment or a freezing compartment; the variable-temperature dew-removing pipe is connected with the output end of the condenser in parallel with a bypass pipeline, and a control valve for switching on and off the first branch is connected in series on the first branch where the variable-temperature dew-removing pipe is located. The utility model discloses a cold-stored refrigerating plant sets up a bypass line that removes dew pipe parallel connection with the alternating temperature especially, and the alternating temperature removes still series connection and has the control valve that can switch on or block this first branch road on the first branch road at dew pipe place, from this, can be according to the switching state of the temperature adjustment control valve of settlement of alternating temperature room, thereby selectively allow the refrigerant to flow through alternating temperature dew pipe of removing, the different temperature requirements to the alternating temperature dew pipe of removing under the different settlement temperatures of alternating temperature room have been satisfied, cold volume loss has been avoided, the power consumption of cold-stored refrigerating plant has been reduced.

Description

Refrigerating and freezing device

Technical Field

The utility model relates to a cold-stored freezing storage technique especially relates to a cold-stored refrigeration device.

Background

Because the inside temperature of refrigerator is a lot of less than the temperature of refrigerator environment, the door body that leads to the storing compartment of refrigerator often can form the condensation water with door frame contact department, for avoiding the production of condensation, has generally arranged in the intermediate layer of door frame and has removed the dew pipe, removes dew pipe and condenser intercommunication, utilizes the waste heat of the refrigerant after the condenser cooling to heat the door frame, in order to prevent the dewfall.

In the existing refrigerator with a plurality of storage chambers, the dew removing pipe is generally a thin steel pipe, is bent according to the shape and the position of a door frame of each storage chamber, is distributed in the door frame of each storage chamber, only has one inlet end and one outlet end, and refrigerant at the output end of a condenser enters the dew removing pipe from the inlet end of the dew removing pipe and flows to a downstream capillary tube from the outlet end of the dew removing pipe.

The flow path of the refrigerant in the dew removing pipe is fixed, the heat of the refrigerant in the section of the dew removing pipe corresponding to the temperature changing chamber is constant, for example, when the temperature changing chamber is used as a refrigerating chamber, the temperature of the dew removing pipe is still high, so that the loss of refrigerating capacity of the refrigerator is more, and the power consumption is larger.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome at least one defect of prior art, provide a can reduce cold volume loss and power consumption's cold-stored refrigerating plant.

A further object of the present invention is to improve dew removal.

In order to achieve the above object, the present invention provides a refrigerating and freezing apparatus, which comprises:

a cabinet defining therein a temperature-variable compartment for storing goods, the temperature-variable compartment being selectively used as a refrigerating compartment or a freezing compartment; and

the temperature-changing dew-removing device comprises a condenser and a temperature-changing dew-removing pipe, wherein the temperature-changing dew-removing pipe and a bypass pipeline are connected in parallel to the output end of the condenser, and a control valve for switching on and off a first branch is connected in series on a first branch where the temperature-changing dew-removing pipe is located.

Optionally, when the set temperature of the temperature-changing chamber is in the temperature regulation interval of the freezing chamber, the control valve is in an open state to conduct the first branch, so as to allow the refrigerant flowing out of the condenser to flow through the temperature-changing dewing pipe.

Optionally, when the set temperature of the temperature-changing chamber is in the temperature regulation range of the refrigerating chamber, the control valve is in a closed state to block the first branch, so that the refrigerant flowing out of the condenser is prevented from flowing through the temperature-changing dew-removing pipe.

Optionally, the refrigeration and freezing apparatus further comprises a throttling device and an evaporator connected in series; the input end of the throttling device is connected with the bypass pipeline and the output end of the first branch, and the output end of the throttling device is connected with the input end of the evaporator.

Optionally, a refrigerating chamber and/or a freezing chamber for storing articles are/is further defined in the box body; and is provided with

When the freezing chamber is defined in the refrigerator body, the refrigerating and freezing device further comprises a freezing dew-removing pipe arranged in the bypass pipeline, so that the refrigerant flowing out of the condenser is allowed to flow through the freezing dew-removing pipe.

Optionally, a refrigerating compartment for storing articles is further defined in the box body; and is

The refrigeration and freezing device also comprises a switching valve, a variable-temperature throttling device, a variable-temperature evaporator, a refrigeration throttling device and a refrigeration evaporator;

the variable temperature throttling device is connected with the variable temperature evaporator in series to form a variable temperature refrigeration branch;

the refrigeration throttling device is connected with the refrigeration evaporator in series to form a refrigeration branch;

the input end of the switching valve is connected with the output end of the first branch and the output end of the bypass pipeline, and the switching valve is provided with a first output end connected with the input end of the variable temperature refrigeration branch and a second output end connected with the input end of the refrigeration branch; and is provided with

When the temperature-changing chamber needs to be refrigerated, the input end of the switching valve is communicated with the first output end of the switching valve so as to allow refrigerant to flow through the temperature-changing throttling device and the temperature-changing evaporator;

when the refrigerating chamber needs to be refrigerated, the input end of the switching valve is communicated with the second output end of the switching valve so as to allow refrigerant to flow through the refrigerating throttling device and the refrigerating evaporator.

Optionally, a freezing chamber for storing articles is further defined in the box body;

the refrigerating and freezing device also comprises a freezing throttling device and a freezing evaporator;

the freezing throttling device is connected with the cold storage refrigerating branch and the variable temperature refrigerating branch in parallel, and the switching valve is provided with a third output end connected with the input end of the freezing throttling device; the output ends of the refrigeration branch, the variable temperature refrigeration branch and the freezing throttling device are connected with the input end of the freezing evaporator; and is

When the freezing chamber needs to be refrigerated, the input end of the switching valve is communicated with the third output end of the switching valve so as to allow the refrigerant to flow through the freezing throttling device.

Optionally, the refrigeration and freezing device further comprises a freezing dew-removing pipe; and is

The freezing dew-removing pipe is disposed in the bypass line to allow the refrigerant flowing out of the condenser to flow therethrough.

Optionally, a freezing chamber for storing articles is further defined in the box body;

the refrigeration and freezing device also comprises a switching valve, a variable-temperature throttling device, a variable-temperature evaporator, a freezing throttling device and a freezing evaporator;

the variable temperature throttling device is connected with the variable temperature evaporator in series to form a variable temperature refrigeration branch;

the freezing throttling device is connected with the variable-temperature refrigerating branch in parallel;

the input end of the switching valve is connected with the output end of the first branch and the output end of the bypass pipeline, and the switching valve is provided with a first output end connected with the input end of the variable-temperature refrigeration branch and a third output end connected with the input end of the freezing throttling device; the output ends of the variable-temperature refrigeration branch and the freezing throttling device are connected with the input end of the freezing evaporator;

when the temperature-changing chamber needs to be refrigerated, the input end of the switching valve is communicated with the first output end of the switching valve so as to allow refrigerant to flow through the temperature-changing throttling device and the temperature-changing evaporator; and is

When the freezing chamber needs to be cooled, the input end of the switching valve is communicated with the third output end of the switching valve so as to allow the refrigerant to flow through the freezing throttling device.

Optionally, the refrigeration and freezing device further comprises a freezing dew-removing pipe; and is

The freeze dew-removing pipe is disposed in the bypass line to allow the refrigerant flowing out of the condenser to flow therethrough.

The utility model discloses a cold-stored refrigerating plant sets up a bypass line that removes dew pipe parallel connection with the alternating temperature especially, and the alternating temperature removes still series connection on the first branch at dew pipe place and has the control valve that can switch on or block this first branch road, from this, can be according to the switching state of the temperature adjustment control valve of settlement of alternating temperature room, thereby selectively allow the refrigerant to flow through alternating temperature dew pipe of removing, the different temperature requirements to the alternating temperature dew pipe of removing under the different settlement temperatures of alternating temperature room have been satisfied, cold volume loss has been avoided, the power consumption of cold-stored refrigerating plant has been reduced.

Further, if cold-stored refrigerating plant is except including the alternating temperature room, still including freezing room, the utility model discloses it removes the dew pipe and freezes and removes the dew pipe to have set up the alternating temperature for alternating temperature room and freezing room correspondence respectively to freezing except that the dew pipe sets up in the bypass line parallelly connected mutually with the alternating temperature except that the first branch at dew pipe place, that is to say, freezing dew pipe and alternating temperature are removed the dew pipe and are parallel connection. When the variable-temperature chamber is used as a freezing chamber, condensation of the variable-temperature chamber and the door bodies corresponding to the freezing chamber are required to be removed, at the moment, the refrigerant with higher temperature flowing out of the condenser can be divided into two branches to flow to the freezing condensation removal pipe and the variable-temperature condensation removal pipe respectively, and therefore condensation of the variable-temperature chamber and the door bodies corresponding to the freezing chamber is removed respectively. Because the temperature of the refrigerant flowing through the freezing dew-removing pipe and the temperature-changing dew-removing pipe is directly flowed out from the condenser, the temperature is relatively high, and therefore, the dew-removing effect is good.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the present invention will be described in detail hereinafter, by way of illustration and not by way of limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

fig. 1 is a schematic block diagram of a refrigeration and freezing apparatus according to an embodiment of the present invention;

fig. 2 is a schematic block diagram of a refrigerating and freezing apparatus according to another embodiment of the present invention;

fig. 3 is a schematic block diagram of a refrigerating and freezing apparatus according to a further embodiment of the present invention;

fig. 4 is a schematic block diagram of a refrigerating and freezing apparatus according to still another embodiment of the present invention;

fig. 5 is a schematic block diagram of a refrigerating and freezing apparatus according to still another embodiment of the present invention.

Detailed Description

The utility model provides a cold-stored refrigeration device, cold-stored refrigeration device include the box, inject at least in the box and have the alternating temperature room that is used for storing article, and the indoor settlement temperature of alternating temperature room is adjustable to make alternating temperature room selectively as cold-stored room or freezing room. The temperature control section in the refrigerating compartment may be, for example, 0 to 8 ℃, and the temperature control section in the freezing compartment may be, for example, -24 to-18 ℃.

Fig. 1 is a schematic block diagram of a refrigeration and freezing apparatus according to an embodiment of the present invention. Referring to fig. 1, the refrigerating and freezing device 1 further includes a condenser 10 and a temperature-varying dew condensation removing pipe 21, the temperature-varying dew condensation removing pipe 21 is connected in parallel with a bypass pipe 31 to an output end of the condenser 10, and a control valve 41 for opening and closing the first branch 32 is connected in series to the first branch 32 where the temperature-varying dew condensation removing pipe 21 is located.

The utility model discloses a cold-stored refrigerating plant sets up a bypass line 31 with alternating temperature dew removal pipe 21 parallel connection especially, and alternating temperature dew removal pipe 21 place still on the first branch 32 on series connection have can switch on or block this first branch 32 control valve 41, from this, can be according to the switching state of the temperature adjustment control valve 41 of settlement of alternating temperature room, thereby selectively allow the refrigerant to flow through alternating temperature dew removal pipe 21, the different temperature requirements to alternating temperature dew removal pipe 21 under the different settlement temperature of alternating temperature room have been satisfied, cold volume loss has been avoided, the power consumption of cold-stored refrigerating plant 1 has been reduced.

In some embodiments, when the set temperature of the temperature varying compartment is in the temperature regulation zone of the freezing compartment, that is, the temperature varying compartment serves as the freezing compartment, the control valve 41 is in an open state to communicate the first branch line 32, thereby allowing the refrigerant flowing out of the condenser 10 to flow through the temperature varying dew condensation removing pipe 21.

When the set temperature of the variable-temperature chamber is in the temperature regulation interval of the freezing chamber, the temperature in the variable-temperature chamber is low, and condensation is easily generated at the variable-temperature door body corresponding to the variable-temperature chamber. Therefore, the utility model discloses set up control valve 41 to the open mode, can allow the higher refrigerant of the temperature that flows out from condenser 10 to flow through the alternating temperature and remove dew pipe 21 to reduce the inside and outside difference in temperature of the alternating temperature door body department, reduced or avoided the production of condensation, improved the effect of removing the condensation.

In some embodiments, when the set temperature of the temperature varying compartment is in the temperature regulation zone of the refrigerating compartment, that is, the temperature varying compartment serves as the refrigerating compartment, the control valve 41 is in a closed state to block the first branch line 32, thereby preventing the refrigerant flowing out of the condenser 10 from flowing through the temperature varying dew condensation removing pipe 21.

When the set temperature of the variable-temperature chamber is in the temperature adjusting range of the refrigerating chamber, the temperature in the variable-temperature chamber is relatively high, and condensation is not easy to generate at the variable-temperature door body corresponding to the variable-temperature chamber. Therefore, the utility model discloses set up control valve 41 to the closed condition, can prevent to flow through the alternating temperature dew removing pipe 21 from the higher refrigerant of the temperature that condenser 10 flowed out to reduce cold volume loss of cold-stored refrigeration device 1, and then reduced cold-stored refrigeration device 1's power consumption.

The refrigeration and freezing apparatus 1 further includes a throttling device 50 and an evaporator 60 connected in series; the input of the throttle device 50 is connected to the bypass line 31 and the output of the first branch 32, and the output of the throttle device 50 is connected to the input of the evaporator 60.

Further, the refrigerating and freezing device 1 further comprises a compressor 70, an output end of the evaporator 60 is connected with an input end of the compressor 70, and an output end of the compressor 70 is connected with an input end of the condenser 10, thereby forming a complete compression refrigeration cycle system.

Fig. 2 is a schematic block diagram of a refrigeration and freezing apparatus according to another embodiment of the present invention. Referring to fig. 2, in other embodiments, a refrigerating compartment and/or a freezing compartment for storing articles are further defined in the cabinet. That is, the refrigerating and freezing apparatus 1 includes a refrigerating compartment and/or a freezing compartment in addition to the variable temperature compartment. The variable temperature chamber, the refrigerating chamber and the freezing chamber can be refrigerated by the cold energy generated by the same evaporator 60. In other words, the refrigerating and freezing apparatus 1 may be a single system refrigerator.

In some embodiments, for a single-system refrigeration freezer, referring to fig. 2, when a freezing compartment is defined in the cabinet, the refrigeration freezer 1 further includes a freeze dew-removal pipe 22 disposed in the bypass line 31 to allow the refrigerant flowing out of the condenser 10 to flow through the freeze dew-removal pipe 22.

Since the set temperature in the freezing compartment is much lower than the ambient space temperature in which the refrigerating and freezing device 1 is located, it is necessary to remove condensation at the freezing door corresponding to the freezing compartment. Therefore, the utility model discloses to freeze and remove the dew pipe and establish in bypass pipeline 31, bypass pipeline 31's input and output are lug connection respectively in condenser 10's output and throttling arrangement 50's input, consequently, the freezing dew pipe 22 that removes must flow through from the relatively higher refrigerant of the temperature that condenser 10 flowed out to the freezing door body department can not produce the condensation, has improved and has removed the condensation effect.

Fig. 3 is a schematic block diagram of a refrigerating and freezing apparatus according to still another embodiment of the present invention. Referring to fig. 3, in still other embodiments, a refrigerating compartment for storing articles is defined in the cabinet in addition to the temperature-changing compartment.

In these embodiments, the refrigerating and freezing apparatus 1 further includes a switching valve 42, a temperature-changing throttle device 51, a temperature-changing evaporator 61, a refrigerating throttle device 52, and a refrigerating evaporator 62. The temperature-varying throttling device 51 and the temperature-varying evaporator 61 are connected in series to form a temperature-varying refrigeration branch 33. The refrigeration throttle 52 and the refrigeration evaporator 62 are connected in series to form the refrigeration branch 34. An input end of the switching valve 42 is connected to an output end of the first branch line 32 and an output end of the bypass line 31, and the switching valve 42 has a first output end connected to an input end of the temperature-changing refrigeration branch line 33 and a second output end connected to an input end of the refrigerating refrigeration branch line 34.

When the temperature-varying chamber needs to be refrigerated, the input end of the switching valve 42 is communicated with the first output end thereof to allow the refrigerant to flow through the temperature-varying throttling device 51 and the temperature-varying evaporator 61, so that the temperature-varying evaporator 61 provides cold energy for the temperature-varying chamber. When the refrigeration compartment requires refrigeration, the input of the switching valve 42 communicates with its second output to allow refrigerant to flow through the refrigeration restriction 52 and the refrigeration evaporator 62 to provide refrigeration to the refrigeration compartment through the refrigeration evaporator 62.

That is, the refrigerating and freezing device 1 may be a dual-system refrigerating and freezing device including two storage compartments, i.e., a variable-temperature compartment and a refrigerating compartment.

Because the temperature difference between the refrigerating chamber and the environment space where the refrigerating and freezing device 1 is located is not too large, condensation is rarely generated on the refrigerating door body corresponding to the refrigerating chamber. Therefore, the utility model discloses a cold-stored refrigeration device 1 does not set up cold-stored dew tube that removes, can reduce cold volume loss of cold-stored refrigeration device 1 to a certain extent, and then reduces its power consumption.

Fig. 4 is a schematic block diagram of a refrigerating and freezing apparatus according to still another embodiment of the present invention. Referring to fig. 4, in still other embodiments, a freezing compartment for storing articles is defined in the cabinet in addition to the temperature changing compartment and the refrigerating compartment.

In these embodiments, the refrigeration freezer 1 includes a freezing throttle device 53 and a freezing evaporator 63 in addition to the components included in the embodiment shown in fig. 3. The freezing throttling device 53 is connected with the refrigerating and refrigerating branch 34 and the temperature-changing refrigerating branch 33 in parallel, and the switching valve 42 is provided with a third output end connected with the input end of the freezing throttling device 53; the output ends of the refrigeration and refrigeration branch 34, the temperature-changing refrigeration branch 33 and the freezing throttling device 53 are all connected with the input end of the freezing evaporator 63.

When the freezer compartment requires refrigeration, the input of the switching valve 42 communicates with its third output to allow refrigerant to flow through the freezer throttle 53.

That is, the refrigerating and freezing apparatus 1 may be a multi-system refrigerating and freezing apparatus including three storage compartments, i.e., a variable temperature compartment, a refrigerating compartment, and a freezing compartment.

In some embodiments, for a multi-system refrigeration and freezing apparatus, referring to fig. 4, when a freezing compartment is defined in the cabinet, the refrigeration and freezing apparatus 1 further includes a freeze dew-removal pipe 22 disposed in the bypass line 31 to allow the refrigerant flowing out of the condenser 10 to flow through the freeze dew-removal pipe 22.

Since the set temperature in the freezing compartment is much lower than the temperature of the ambient space where the refrigerating and freezing device 1 is located, it is necessary to remove condensation at the freezing door body corresponding to the freezing compartment. Therefore, the utility model discloses to freeze and remove the dew pipe and establish in bypass pipeline 31, bypass pipeline 31's input and output difference lug connection in condenser 10's output and throttling arrangement 50's input, consequently, the relatively higher refrigerant of the temperature that flows out from condenser 10 must flow through freezing dew pipe 22 that removes to ensure that the freezing door body department can not produce the condensation, improved and removed the condensation effect.

Fig. 5 is a schematic block diagram of a refrigerating and freezing apparatus according to still another embodiment of the present invention. Referring to fig. 5, in still further embodiments, a freezer compartment for storing items is defined within the cabinet in addition to the temperature-changing compartment.

In these embodiments, the refrigerating and freezing apparatus 1 further includes a switching valve 42, a variable temperature throttling device 51, a variable temperature evaporator 61, a freezing throttling device 53, and a freezing evaporator 63. The temperature-varying throttling device 51 and the temperature-varying evaporator 61 are connected in series to form a temperature-varying refrigeration branch 33. The freezing throttling device 53 is connected in parallel with the temperature-changing refrigeration branch 33. The input end of the switching valve 42 is connected with the output end of the first branch line 32 and the output end of the bypass line 31, the switching valve 42 is provided with a first output end connected with the input end of the variable temperature refrigeration branch line 33 and a third output end connected with the input end of the freezing throttling device 53; the output ends of the temperature-changing refrigeration branch 33 and the freezing throttling device 53 are connected with the input end of the freezing evaporator 63.

When the temperature-varying chamber needs to be refrigerated, the input end of the switching valve 42 is communicated with the first output end thereof to allow the refrigerant to flow through the temperature-varying throttling device 51 and the temperature-varying evaporator 61, so that the temperature-varying evaporator 61 provides cold energy for the temperature-varying chamber. When the freezing compartment requires cooling, the input of the switching valve 42 communicates with the third output thereof to allow the refrigerant to flow through the freezing throttle device 53.

That is, the refrigerating and freezing apparatus 1 may be a dual-system refrigerating and freezing apparatus including two storage compartments, i.e., a variable-temperature compartment and a freezing compartment.

In some embodiments, for a multi-system refrigeration freezer, referring to fig. 5, when a freezing compartment is defined in the cabinet, the refrigeration freezer 1 further includes a freeze dewing pipe 22 disposed in the bypass line 31 to allow refrigerant flowing out of the condenser 10 to flow through the freeze dewing pipe 22.

Since the set temperature in the freezing compartment is much lower than the ambient space temperature in which the refrigerating and freezing device 1 is located, it is necessary to remove condensation at the freezing door corresponding to the freezing compartment. Therefore, the utility model discloses to freeze and remove the dew pipe and establish in bypass pipeline 31, bypass pipeline 31's input and output are lug connection respectively in condenser 10's output and throttling arrangement 50's input, consequently, the freezing dew pipe 22 that removes must flow through from the relatively higher refrigerant of the temperature that condenser 10 flowed out to the freezing door body department can not produce the condensation, has improved and has removed the condensation effect.

For the multi-system refrigeration and freezing apparatus 1 shown in fig. 3 to 5, the refrigeration and freezing apparatus 1 further comprises a compressor 70, an output of the freezing evaporator 63 is connected to an input of the compressor 70, and an output of the compressor 70 is connected to an input of the condenser 10, thereby forming a complete compression refrigeration cycle system.

In some embodiments, the refrigerating and freezing device 1 may be a single system refrigerator, a dual system refrigerator, a multi system refrigerator, or other storage device having at least variable temperature compartments.

In some embodiments, the throttling device 60, the temperature changing throttling device 61, the refrigerating throttling device 62 and the freezing throttling device 63 can be suitable throttling devices such as capillary tubes, electromagnetic throttling valves and the like.

It is to be understood by those skilled in the art that the above-described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments of the present invention, which are intended to explain the technical principles of the present invention and not to limit the scope of the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by a person skilled in the art without any inventive work should still fall within the scope of the present invention.

It should be noted that, unless otherwise explicitly stated or limited in the description of the present invention, the terms "mounted," "connected" and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described in detail herein, many other variations and modifications can be made, consistent with the principles of the invention, which are directly determined or derived from the disclosure herein, without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and interpreted to cover all such other variations or modifications.

Claims (10)

1. A refrigeration freezer apparatus, comprising:

a cabinet defining therein a temperature-variable compartment for storing goods, the temperature-variable compartment being selectively used as a refrigerating compartment or a freezing compartment; and

the temperature-changing dew-removing device comprises a condenser and a temperature-changing dew-removing pipe, wherein the temperature-changing dew-removing pipe and a bypass pipeline are connected in parallel to the output end of the condenser, and a control valve for switching on and off a first branch is connected in series on a first branch where the temperature-changing dew-removing pipe is located.

2. A refrigerator-freezer according to claim 1,

when the set temperature of the variable temperature chamber is in the temperature regulation interval of the freezing chamber, the control valve is in an opening state to conduct the first branch circuit, so that the refrigerant flowing out of the condenser is allowed to flow through the variable temperature dew removing pipe.

3. A refrigerator-freezer according to claim 1,

when the set temperature of the variable temperature chamber is in the temperature regulation range of the refrigerating chamber, the control valve is in a closed state to block the first branch, so that the refrigerant flowing out of the condenser is prevented from flowing through the variable temperature dew removing pipe.

4. A refrigerator-freezer according to claim 1,

the refrigerating and freezing device also comprises a throttling device and an evaporator which are connected in series; the input end of the throttling device is connected with the bypass pipeline and the output end of the first branch, and the output end of the throttling device is connected with the input end of the evaporator.

5. A refrigerator-freezer according to claim 4,

a refrigerating chamber and/or a freezing chamber for storing articles are/is further defined in the box body; and is

When the freezing chamber is defined in the refrigerator body, the refrigerating and freezing device further comprises a freezing dew-removing pipe arranged in the bypass pipeline, so that the refrigerant flowing out of the condenser is allowed to flow through the freezing dew-removing pipe.

6. A refrigerator-freezer according to claim 1,

a refrigerating compartment for storing articles is further defined in the box body; and is provided with

The refrigeration and freezing device also comprises a switching valve, a variable-temperature throttling device, a variable-temperature evaporator, a refrigeration throttling device and a refrigeration evaporator;

the variable temperature throttling device is connected with the variable temperature evaporator in series to form a variable temperature refrigeration branch;

the refrigeration throttling device is connected with the refrigeration evaporator in series to form a refrigeration branch;

the input end of the switching valve is connected with the output end of the first branch and the output end of the bypass pipeline, and the switching valve is provided with a first output end connected with the input end of the variable-temperature refrigeration branch and a second output end connected with the input end of the refrigeration branch; and is

When the temperature-changing chamber needs to be refrigerated, the input end of the switching valve is communicated with the first output end of the switching valve so as to allow refrigerant to flow through the temperature-changing throttling device and the temperature-changing evaporator;

when the refrigerating chamber needs to be refrigerated, the input end of the switching valve is communicated with the second output end of the switching valve so as to allow refrigerant to flow through the refrigerating throttling device and the refrigerating evaporator.

7. A refrigerator-freezer according to claim 6,

a freezing chamber for storing articles is further defined in the box body;

the refrigerating and freezing device also comprises a freezing throttling device and a freezing evaporator;

the freezing throttling device is connected with the cold storage refrigeration branch and the variable temperature refrigeration branch in parallel, and the switching valve is provided with a third output end connected with the input end of the freezing throttling device; the output ends of the refrigeration branch, the temperature-changing refrigeration branch and the freezing throttling device are connected with the input end of the freezing evaporator; and is provided with

When the freezing chamber needs to be refrigerated, the input end of the switching valve is communicated with the third output end of the switching valve so as to allow the refrigerant to flow through the freezing throttling device.

8. A refrigerator-freezer according to claim 7,

the refrigerating and freezing device also comprises a freezing dew-removing pipe; and is

The freeze dew-removing pipe is disposed in the bypass line to allow the refrigerant flowing out of the condenser to flow therethrough.

9. A refrigerator-freezer according to claim 1,

a freezing chamber for storing articles is further defined in the box body;

the refrigeration and freezing device also comprises a switching valve, a variable-temperature throttling device, a variable-temperature evaporator, a freezing throttling device and a freezing evaporator;

the variable temperature throttling device is connected with the variable temperature evaporator in series to form a variable temperature refrigeration branch;

the freezing throttling device is connected with the variable-temperature refrigerating branch in parallel;

the input end of the switching valve is connected with the output end of the first branch and the output end of the bypass pipeline, and the switching valve is provided with a first output end connected with the input end of the variable temperature refrigeration branch and a third output end connected with the input end of the freezing throttling device; the output ends of the variable temperature refrigeration branch and the freezing throttling device are connected with the input end of the freezing evaporator;

when the temperature-changing chamber needs to be refrigerated, the input end of the switching valve is communicated with the first output end of the switching valve so as to allow refrigerant to flow through the temperature-changing throttling device and the temperature-changing evaporator; and is

When the freezing chamber needs to be cooled, the input end of the switching valve is communicated with the third output end of the switching valve so as to allow the refrigerant to flow through the freezing throttling device.

10. A refrigerator-freezer according to claim 9,

the refrigerating and freezing device also comprises a freezing dew-removing pipe; and is

The freezing dew-removing pipe is disposed in the bypass line to allow the refrigerant flowing out of the condenser to flow therethrough.

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