CN218764163U - Refrigerator with a door - Google Patents

Abstract

The utility model provides a refrigerator, which comprises a refrigerator body, a refrigerating chamber, a refrigerating assembly, a drawer and a temperature control assembly; the refrigerating chamber comprises a freezing chamber and a temperature changing chamber; a temperature-changing air duct for air flowing is formed between the freezing chamber and the temperature-changing chamber; the temperature control component comprises a circulating pipe and a circulating pump. The cold air in the freezing chamber passes through the temperature-changing air duct to refrigerate the food in the temperature-changing chamber. The circulating pump drives the refrigerant in the circulating pipe to flow, so that the refrigerant absorbs cold in the region with relatively low temperature in the variable temperature chamber and releases the cold to the region with relatively high temperature in the variable temperature chamber, and the circulating pipe is uniformly distributed in the variable temperature chamber and fully distributed in the variable temperature chamber, so that the temperature difference of each position in the variable temperature chamber can be reduced, the uniform temperature of each position in the variable temperature chamber is effectively ensured, and the storage of food in the variable temperature chamber is facilitated.

Description

Refrigerator with a door

Technical Field

The utility model relates to a household electrical appliances technical field, in particular to refrigerator.

Background

At the present stage, an independent sealed temperature-changing chamber is arranged in a refrigerating chamber of part of refrigerators, the temperature of the temperature-changing chamber is independently controlled, the temperature adjusting range is large, the volume is about 20 liters, and the temperature-changing chamber is used for storing various types of food, for example, when the temperature is adjusted to be low, meat can be stored for a short time, the meat is in a low-temperature non-freezing state, the freshness of the meat can be ensured, and the influence on the eating taste caused by the fact that the meat is frozen at too low temperature can be avoided. Others can adjust different temperatures for preserving various fruits. Because the temperature-changing chamber needs to be independently controlled in temperature and the humidity of stored food needs to be preserved, the temperature-changing chamber is in a sealed state and is refrigerated, and a hole with an air door is formed in one side of the drawer and used for allowing cold air to enter the temperature-changing chamber and refrigerating the temperature-changing chamber.

In the related art, in order to reduce the temperature difference inside the space inside the refrigerator, the method mainly includes that an air duct for promoting the air circulation inside the space is arranged inside the refrigerator space, and a fan is arranged inside the air duct to force the air inside the space to flow, so that the temperature difference inside the space is reduced. And for the temperature-changing chamber in the refrigerator, the space is very small, the volume is about 20 liters, and if an air duct, a fan and the like are arranged, more space is occupied, so that the temperature-changing drawer is not large, the volume is smaller, and the storage of food by a user is not facilitated.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a refrigerator, it is provided with temperature control assembly to can reduce the inside each position temperature difference in alternating temperature room, the temperature of each position in the effectual assurance alternating temperature room is even, so that the storage of food in the alternating temperature room.

In order to solve the technical problem, the utility model adopts the following technical scheme:

according to one aspect of the utility model, the utility model provides a refrigerator, which comprises a box body, a refrigeration chamber, a refrigeration component, a drawer and a temperature control component; the refrigerating chamber is formed in the box body; the refrigerating chamber comprises a freezing chamber and a temperature changing chamber; the front side of the temperature-changing chamber is opened; a temperature-changing air duct for air flowing is formed between the freezing chamber and the temperature-changing chamber, so that cold air in the freezing chamber flows into the temperature-changing chamber; the refrigerating assembly is used for providing cold air for the freezing chamber; the drawer is used for containing food; the drawer can detachably extend into the temperature changing chamber and can seal the temperature changing chamber; the temperature control component comprises a circulating pipe and a circulating pump; the circulating pipe is arranged in the temperature changing chamber and is wound on the inner peripheral wall of the temperature changing chamber; the circulating pipes are uniformly distributed in the temperature changing chamber and are fully distributed in the temperature changing chamber; a refrigerant capable of flowing is arranged in the circulating pipe, so that the gas on the peripheral side of the circulating pipe can exchange heat with the refrigerant; the circulating pump is arranged on the circulating pipe and used for driving the refrigerant to flow in the circulating pipe.

In some embodiments of the present application, the temperature control assembly further comprises a heat exchanger; the heat exchanger is arranged in the variable temperature air channel and is connected with the inlet and the outlet of the circulating pipe so as to provide cold energy for the refrigerant.

In some embodiments of the present application, the heat exchanger includes a main body and heat exchange fins disposed outside the main body; a sealed chamber is formed in the main body; the inlet and outlet of the circulation tube are connected to the main body and communicate with the chamber.

In some embodiments of the present application, the heat exchanging fin is provided in plurality in parallel and spaced on the body.

In some embodiments of the present application, a foaming layer is formed between the refrigerating compartment and the box body, and the temperature-changing air duct and the heat exchanger are both located in the foaming layer.

In some embodiments of the present application, the circulation pipe is sequentially arranged between the upper side wall, the left and right side walls, and the lower side wall of the temperature changing chamber, and forms a surrounding structure.

In some embodiments of the application, be provided with the air door in the alternating temperature wind channel, the air door can be opened and closed to make the interior cold air of freezer chamber can be optional flows to in the alternating temperature chamber.

In some embodiments of this application, the air door is the electrodynamic type air door, still be provided with the controller in the box, the automatically controlled connection of controller the air door is in order to adjust the aperture of air door to the cold air flow in the control alternating temperature wind channel.

In some embodiments of the present application, the refrigerated compartment further comprises a refrigerated compartment; the refrigerating chamber and the freezing chamber are arranged at left and right intervals; the temperature change chamber is arranged at the bottom of the refrigerating chamber; the variable temperature air duct is arranged along the left and right direction and penetrates through the freezing chamber and the variable temperature chamber.

In some embodiments of the present application, a door is disposed on a front side of the cabinet, and the door can rotatably cover the front side of the cabinet to open and close the refrigeration compartment.

According to the above technical scheme, the utility model discloses following advantage and positive effect have at least:

the utility model discloses in, the refrigeration subassembly is used for providing air conditioning for the freezer to be used for the freezer refrigeration. The cold air in the freezing chamber passes through the temperature-changing air duct to refrigerate the food in the temperature-changing chamber. The circulating pump drives the refrigerant in the circulating pipe to flow, so that the refrigerant absorbs cold in a region with relatively low indoor temperature of the variable temperature chamber and releases the cold to a region with relatively high indoor temperature of the variable temperature chamber, and the circulating pipe is uniformly distributed in the variable temperature chamber and is fully distributed in the variable temperature chamber, so that the temperature difference of each position in the variable temperature chamber can be reduced, the uniform temperature of each position in the variable temperature chamber is effectively ensured, and the food can be stored in the variable temperature chamber conveniently.

Drawings

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

Fig. 2 is a schematic structural view of a temperature control assembly according to an embodiment of the refrigerator of the present invention.

FIG. 3 is a schematic view showing the layout of the circulation tube of the embodiment of the refrigerator of the present invention.

Fig. 4 is a schematic structural diagram of a heat exchanger according to an embodiment of the refrigerator of the present invention.

FIG. 5 is a schematic view showing the connection between a circulation pump and a circulation pipe according to an embodiment of the refrigerator of the present invention.

The reference numerals are explained below: 100. a box body; 110. a freezing chamber; 120. a refrigerating chamber; 130. a temperature-variable chamber; 140. a variable temperature air duct; 150. an air door; 210. a circulation pipe; 220. a circulation pump; 230. a heat exchanger; 231. a main body; 232. heat exchange fins; 300. an evaporator.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.

Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the application. One skilled in the relevant art will recognize, however, that the subject matter of the present application can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and so forth. In other instances, well-known methods, devices, implementations, or operations have not been shown or described in detail to avoid obscuring aspects of the application.

The present application will be described in further detail with reference to the following drawings and specific examples. It should be noted that the technical features mentioned in the embodiments of the present application described below may be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the accompanying drawings are illustrative and intended to explain the present application and should not be construed as limiting the present application.

In the related art, in order to reduce the temperature difference inside the space inside the refrigerator, a method is mainly adopted in which an air duct for promoting the air circulation inside the space is arranged in the refrigerator space, and a fan is arranged inside the air duct to force the air inside the space to flow, so as to reduce the temperature difference inside the space. And to the inside temperature-changing chamber of refrigerator, the space originally is very little, and the volume is about 20 liters, if set up wind channel and fan etc. can occupy more space for this not big temperature-changing drawer, the volume is littleer, is unfavorable for the user to store food. The utility model provides a refrigerator to solve the technical problem.

For convenience of description and understanding, a state of the refrigerator when the refrigerator is vertically used is taken as a reference, a direction of the refrigerator toward a user is a front direction, a direction of the refrigerator away from the user is a rear direction, a vertical direction is a vertical direction, and a width direction of the refrigerator is a left-right direction.

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

Referring to fig. 1, the present embodiment provides a refrigerator for storing articles at a low temperature, which may also be a refrigerated showcase or a refrigerated wine cabinet. The refrigerator includes a cabinet 100, a door (not shown) rotatably covering the cabinet 100, a refrigeration assembly disposed in the cabinet 100, and an air duct assembly disposed in the cabinet 100.

The cabinet 100 is constructed to form a refrigerating compartment having an open front side, and foods are placed in the refrigerating compartment to be stored at a low temperature. The refrigerating assembly transmits cold energy to air in the air channel assembly, and provides cold air for the refrigerating chamber so as to obtain the cold air in the air channel assembly. The air duct assembly can be selectively communicated with the refrigerating chamber to guide air in the air duct assembly into the refrigerating chamber, so that the refrigerating chamber can be refrigerated.

The refrigerating compartments include a refrigerating compartment 120 and a freezing compartment 110, and the duct assembly can deliver cooling energy to the refrigerating compartment 120 and the freezing compartment 110, respectively, so that air in the duct assembly can transfer cooling energy to the refrigerating compartment 120 and the freezing compartment 110, respectively, to maintain a refrigerating environment in the refrigerating compartment 120 and the freezing compartment 110.

In the present embodiment, the refrigerating compartments include a refrigerating compartment 120, a freezing compartment 110, and a warming compartment 130. The variable temperature chamber 130 communicates with the freezing chamber 110 so that cool air in the freezing chamber 110 can enter the variable temperature chamber 130 to refrigerate the variable temperature chamber 130.

It should be noted that a temperature-changing air duct 140 for air flowing is formed between the temperature-changing chamber 130 and the freezing chamber 110, so that the cold air in the freezing chamber 110 flows into the temperature-changing chamber 130.

In this embodiment, the refrigerating compartment 120 and the freezing compartment 110 are provided at left and right intervals; the temperature-changing chamber 130 is disposed at the bottom of the refrigerating chamber 120; the variable temperature air duct 140 is disposed in the left-right direction and penetrates the freezing chamber 110 and the variable temperature chamber 130.

A drawer for receiving food is provided in the variable temperature chamber 130, so that the food is stored in the drawer. The drawer is detachably inserted into the variable temperature chamber 130 and can close the variable temperature chamber 130. In this embodiment, a drawer is slidably disposed in the temperature varying chamber 130 in a front-rear direction to be able to draw out or extend in the drawer from the temperature varying chamber 130 to the outside from the front side of the temperature varying chamber 130, so that food can be taken in or out of the drawer to be placed in or taken out of the temperature varying chamber 130. After the drawer is extended into the variable temperature chamber 130, the front side of the drawer seals the front side of the variable temperature chamber 130, thereby forming a relatively sealed environment within the variable temperature chamber 130.

A foaming layer is formed between the refrigerating compartment and the box body 100, and is filled with foaming materials which surround the upper, lower, left, right and rear side walls of the refrigerating compartment, so that the temperature of the refrigerating compartment is maintained. The variable temperature air duct 140 is located in the foaming layer.

The door is rotatably covered on the cabinet 100 to open or close the refrigerating compartment of the cabinet 100, and articles are taken and placed in the refrigerating compartment.

In the present embodiment, the door includes a freezing door for covering the freezing chamber 110 and a refrigerating door for covering the refrigerating chamber 120. A refrigerating door is openably and closably covered on the front sides of the refrigerating compartment 120 and the warming compartment 130 for opening and closing the refrigerating compartment 120 and the warming compartment 130. The freezing door is openably and closably covered on a front side of the freezing chamber 110 to open and close the freezing chamber 110. The freezing door and the refrigerating door are arranged at intervals along the left and right direction.

In this embodiment, a hinge is provided between the door and the cabinet 100 to connect the door to the cabinet 100 through the hinge, so that the door can rotate around an axis of a vertical direction. The hinge is arranged on one side of the box door in the left and right directions.

The refrigeration assembly is used for releasing heat in the refrigerator to the external environment and supplying cold energy to the refrigeration chamber so as to maintain the low-temperature environment in the refrigeration chamber. The refrigeration components include a compressor, a condenser, an evaporator 300, and a capillary tube. The compressor, the condenser, the capillary tube, and the evaporator 300 are sequentially connected, and an outlet of the evaporator 300 is connected to an inlet of the compressor, thereby forming a passage through which a refrigerant circulates in the compressor, the condenser, the capillary tube, and the evaporator 300. In this embodiment, the evaporator 300 is disposed in the freezing chamber 110.

The air duct component is communicated with the refrigerating chamber so that air circulates between the air duct component and the refrigerating chamber, cold in the air duct component is conveyed into the refrigerating chamber, and heat in the refrigerating chamber is conveyed into the air duct component. The low-temperature and low-pressure liquid refrigerant in the evaporator 300 is converted into a low-temperature and low-pressure gaseous refrigerant after exchanging heat with the air duct assembly. The low-temperature low-pressure gaseous refrigerant in the evaporator 300 is sent to the compressor, where it is compressed into a high-temperature high-pressure gaseous refrigerant.

The high-temperature high-pressure gaseous refrigerant in the compressor is delivered to the condenser, and the high-temperature high-pressure gaseous refrigerant releases heat to the external environment in the condenser, so that the high-temperature high-pressure gaseous refrigerant is converted into the low-temperature high-pressure liquid refrigerant. The low-temperature high-pressure liquid refrigerant is converted into a low-temperature low-pressure liquid refrigerant through the throttling and pressure reducing effects of the capillary. The low temperature and low pressure liquid refrigerant is delivered to the evaporator 300 to exchange heat with the air in the air duct assembly.

The specific structure and connection relationship of the refrigeration assembly refer to the refrigeration assembly in the related art, and are not described herein in detail.

The air duct assembly is arranged in the box body 100 and can provide cooling capacity for the refrigerating chamber. The specific structure and positional relationship of the air duct assembly are referred to in the related art, and are not described herein again.

Fig. 2 is a schematic structural diagram of a temperature control assembly according to an embodiment of the refrigerator of the present invention. FIG. 3 is a schematic view showing the layout of the circulation tube of the embodiment of the refrigerator of the present invention. Fig. 4 is a schematic structural diagram of a heat exchanger according to an embodiment of the refrigerator of the present invention. FIG. 5 is a schematic view showing the connection between a circulation pump and a circulation pipe according to an embodiment of the refrigerator of the present invention.

Referring to fig. 1 to 5, a temperature control assembly is further disposed in the case 100 for maintaining a uniform temperature in the variable temperature chamber 130. The temperature control assembly comprises a circulating pipe 210 and a circulating pump 220; the circulation pipe 210 is disposed in the variable temperature chamber 130 and wound around the inner circumferential wall of the variable temperature chamber 130; the circulating pipes 210 are uniformly distributed in the temperature-changing chamber 130 and are fully distributed in the temperature-changing chamber 130; a refrigerant capable of flowing is arranged in the circulating pipe 210, so that the gas on the peripheral side of the circulating pipe 210 can exchange heat with the refrigerant; the circulation pump 220 is disposed on the circulation pipe 210 to drive the refrigerant to flow in the circulation pipe 210.

The circulation pump 220 drives the refrigerant in the circulation pipe 210 to flow, so that the refrigerant absorbs cold in the relatively low temperature region of the temperature varying chamber 130 and releases the cold to the relatively high temperature region of the temperature varying chamber 130, and the circulation pipe 210 is uniformly distributed in the temperature varying chamber 130 and is fully distributed in the temperature varying chamber 130, so that the temperature difference of each position in the temperature varying chamber 130 can be reduced, the temperature uniformity of each position in the temperature varying chamber 130 can be effectively ensured, and the storage of food in the temperature varying chamber 130 can be facilitated.

In this embodiment, a damper 150 is disposed in the variable temperature air duct 140, and the damper 150 can be opened and closed, so that the cold air in the freezing chamber 110 can selectively flow into the variable temperature chamber 130, thereby controlling the refrigeration of the variable temperature chamber 130.

The air door 150 is an electric air door, and a controller is further disposed in the box 100, and the controller is electrically connected to the air door 150 to adjust the opening of the air door 150, so as to control the flow rate of the cold air in the variable temperature air duct 140 and control the refrigeration temperature in the variable temperature chamber 130.

In this embodiment, the circulation pipes 210 are sequentially arranged between the upper side wall, the left and right side walls, and the lower side wall of the variable temperature chamber 130 to form a surrounding structure, and the circulation pipes 210 are sequentially arranged so that the circulation pipes 210 can be uniformly arranged in the variable temperature chamber 130.

In some embodiments, the circulation pipe 210 is disposed in a winding shape and sequentially arranged on each inner sidewall inside the variable temperature chamber 130, so that the circulation pipe 210 is uniformly arranged inside the variable temperature chamber 130.

In this embodiment, the temperature control assembly further includes a heat exchanger 230; the heat exchanger 230 is disposed in the variable temperature air duct 140, and the heat exchanger 230 is connected to the inlet and the outlet of the circulation pipe 210 to provide cooling energy to the refrigerant. Through the arrangement of the heat exchanger 230 and the circulating pipe 210, the cold in the variable temperature air duct 140 can be more rapidly and uniformly released to various positions in the variable temperature chamber 130, and the response time of refrigeration and the uniformity of refrigeration are ensured. The cold energy entering the temperature-varying air duct 140 from the freezing chamber 110 partly enters the temperature-varying chamber 130 directly from the temperature-varying air duct 140, and partly is transmitted to the circulation pipe 210 through the heat exchanger 230 and released into the temperature-varying chamber 130 through the circulation pipe 210.

The heat exchanger 230 includes a main body 231 and heat exchange fins 232 disposed outside the main body 231; a sealed chamber is formed in the body 231; the inlet and outlet of the circulation tube 210 are connected to the main body 231 and communicate with the chamber. Through the arrangement of the heat exchange fins 232, the heat exchange area of the heat exchanger 230 is increased, so that better cold energy is transmitted into the circulating pipe 210 through the heat exchanger 230, and the temperature of the temperature changing chamber 130 is more uniform through the uniform arrangement of the circulating pipe 210 in the temperature changing chamber 130.

In this embodiment, the heat exchanging fins 232 are disposed in parallel on the main body 231 at intervals to increase the heat exchanging area of the heat exchanger 230.

Based on the above description, when the damper 150 is opened to start cooling the temperature-varying chamber 130, part of the cooling capacity is directly delivered into the temperature-varying chamber 130 through the temperature-varying air duct 140, and the other part of the cooling capacity is transmitted to the circulation pipe 210 through the heat exchanger 230. The circulation pump 220 starts to work at the same time, at this time, the refrigerant in the circulation pipe 210 absorbs the cold energy at the position of the heat exchanger 230, and when the refrigerant circularly flows to other positions with relatively high temperature, the carried cold energy is emitted out to refrigerate different space positions. The circulation pipe 210 is thin, occupies a small space, and is uniformly and densely distributed on the inner side wall of the temperature changing chamber 130, so that the temperature inside the temperature changing chamber 130 can be uniform in the process of continuous circulation operation of the refrigerant in the circulation pipe 210.

The utility model discloses in, the refrigeration subassembly is used for providing cold air for freezer 110 to be used for freezer 110 refrigeration. The cold air in the freezing chamber 110 passes through the temperature-varying air duct 140 to cool the food in the temperature-varying chamber 130. The circulation pump 220 drives the refrigerant in the circulation pipe 210 to flow, so that the refrigerant absorbs cold in the relatively low temperature region of the temperature-varying chamber 130 and releases the cold to the relatively high temperature region of the temperature-varying chamber 130, and the circulation pipe 210 is uniformly distributed in the temperature-varying chamber 130 and is fully distributed in the temperature-varying chamber 130, thereby reducing the temperature difference of each position in the temperature-varying chamber 130, effectively ensuring the uniform temperature of each position in the temperature-varying chamber 130, and facilitating the storage of food in the temperature-varying chamber 130.

By arranging the circulation pipe 210 and the circulation pump 220 on the inner circumferential wall of the temperature changing chamber 130, the temperature in the temperature changing chamber 130 can be effectively ensured to be uniform, and the arrangement of the circulation pipe 210 and the circulation pump 220 does not affect the arrangement of the drawer in the temperature changing chamber 130.

The arrangement of the heat exchanger 230 in the variable temperature air duct 140 does not affect the space in the variable temperature chamber 130. The heat exchanger 230 is arranged at the air outlet of the variable temperature air duct 140 facing the variable temperature chamber 130.

The circulation pipe 210, the circulation pump 220 and the heat exchanger 230 can be installed on the existing refrigerator structure without making a great change to the refrigerator structure.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In the description herein, references to the description of the terms "some embodiments," "exemplary," etc. mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or exemplary is included in at least one embodiment or exemplary of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present application have been shown and described, it is understood that the above embodiments are illustrative and should not be construed as limiting the present application and that various changes, modifications, substitutions and alterations can be made therein by those skilled in the art within the scope of the present application, and therefore all changes and modifications that come within the meaning of the claims and the description of the invention are to be embraced therein.

Claims (10)

1. A refrigerator, characterized by comprising:

a box body;

a refrigerating compartment formed in the cabinet; the refrigerating chamber comprises a freezing chamber and a temperature changing chamber; the front side of the temperature-changing chamber is opened; a temperature-changing air channel for air flowing is formed between the freezing chamber and the temperature-changing chamber and is used for enabling cold air in the freezing chamber to flow into the temperature-changing chamber;

a refrigerating assembly for providing cold air to the freezing chamber;

a drawer for receiving food; the drawer can detachably extend into the temperature changing chamber and can seal the temperature changing chamber;

the temperature control assembly comprises a circulating pipe and a circulating pump; the circulating pipe is arranged in the temperature changing chamber and is wound on the inner peripheral wall of the temperature changing chamber; the circulating pipes are uniformly distributed in the temperature changing chamber and are fully distributed in the temperature changing chamber; a refrigerant capable of flowing is arranged in the circulating pipe, so that the gas on the peripheral side of the circulating pipe can exchange heat with the refrigerant; the circulating pump is arranged on the circulating pipe and used for driving the refrigerant to flow in the circulating pipe.

2. The refrigerator of claim 1, wherein the temperature control assembly further comprises a heat exchanger; the heat exchanger is arranged in the variable temperature air channel and is connected with the inlet and the outlet of the circulating pipe so as to provide cold energy for the refrigerant.

3. The refrigerator according to claim 2, wherein the heat exchanger includes a main body and heat exchange fins disposed outside the main body; a sealed chamber is formed in the main body; the inlet and outlet of the circulation tube are connected to the main body and communicate with the chamber.

4. The refrigerator of claim 3, wherein the heat exchanging fin is provided in plurality in parallel and spaced on the main body.

5. The refrigerator as claimed in claim 2, wherein a foaming layer is formed between the refrigerating compartment and the cabinet, and the temperature varying duct and the heat exchanger are both located in the foaming layer.

6. The refrigerator as claimed in claim 1, wherein the circulation duct is arranged in sequence between the upper, left and right side walls and the lower side wall of the temperature varying chamber and forms a surrounding structure.

7. The refrigerator as claimed in claim 1, wherein a damper is provided in the temperature varying duct, the damper being capable of being opened and closed so that the cool air in the freezing chamber can selectively flow into the temperature varying chamber.

8. The refrigerator as claimed in claim 7, wherein the damper is an electric damper, a controller is further disposed in the box, and the controller is electrically connected to the damper to adjust the opening of the damper, so as to control the flow of cold air in the variable temperature air duct.

9. The refrigerator of claim 1 wherein the refrigerated compartment further comprises a fresh food compartment; the refrigerating chamber and the freezing chamber are arranged at left and right intervals; the temperature change chamber is arranged at the bottom of the refrigerating chamber; the variable temperature air duct is arranged along the left and right direction and penetrates through the freezing chamber and the variable temperature chamber.

10. The refrigerator as claimed in claim 1, wherein a door is provided at a front side of the cabinet, and the door rotatably covers the front side of the cabinet to open and close the cooling compartment.

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