CN116412620A

CN116412620A - Refrigerator with a refrigerator body

Info

Publication number: CN116412620A
Application number: CN202111647622.XA
Authority: CN
Inventors: 王小倩; 杨明芳; 刘洋
Original assignee: Hisense Shandong Refrigerator Co Ltd
Current assignee: Hisense Shandong Refrigerator Co Ltd
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2023-07-11

Abstract

The invention provides a refrigerator which comprises a top air channel, an evaporator, a return pipeline and a throttling system. The evaporator comprises an evaporator main body positioned in the top air channel, an inlet pipeline and an outlet pipeline extending out of the rear end of the top air channel; one end of the return pipeline is connected with the outlet pipeline, and the other end of the return pipeline is connected with the condenser; the throttling system comprises a first capillary tube, a second capillary tube and a connecting tube for connecting the first capillary tube and the second capillary tube; the connecting pipe and the return pipeline are spaced, the first capillary is positioned outside the top air duct and is attached to the periphery of the return pipeline, the first capillary is communicated with the condenser to receive refrigerant liquid, and the second capillary is connected with the inlet of the inlet pipeline. Through the secondary throttling action of the first capillary tube and the second capillary tube of the throttling system, the refrigerant backflow during defrosting is effectively prevented, and the problem that the inlet position of the evaporator is frozen is solved.

Description

Refrigerator with a refrigerator body

Technical Field

The invention relates to the technical field of refrigeration, in particular to a refrigerator.

Background

Refrigerators are one of the most commonly used household appliances for food storage. In recent years, with the continuous improvement of living standard of people, the performance requirements of the refrigerator are also higher and higher.

Because the pipeline surface of the evaporator can frost in the working process of the refrigerator, the evaporator is generally heated by a heating device so as to defrost the evaporator. However, when defrosting and heating are performed, the refrigerant part is changed from a liquid state to a gaseous state, and liquid refrigerant can flow back to an inlet pipeline of the evaporator without a liquid storage device, so that frosting of the inlet pipeline is increased.

Disclosure of Invention

The invention aims to provide a refrigerator to solve the problem of serious frosting of an inlet pipeline in the prior art.

In order to solve the technical problems, the invention adopts the following technical scheme:

according to one aspect of the present invention, there is provided a refrigerator including:

a top air duct;

the evaporator comprises an evaporator main body positioned in the top air duct, an inlet pipeline and an outlet pipeline extending out of the rear end of the top air duct;

one end of the return pipeline is connected with the outlet pipeline, and the other end of the return pipeline is connected with the condenser;

a throttling system comprising a first capillary tube, a second capillary tube, and a connecting tube connecting the first capillary tube and the second capillary tube; the connecting pipe with have the interval between the return line, first capillary is located outside the top wind channel and laminate in the return line periphery, first capillary with the condenser intercommunication receives refrigerant liquid, the second capillary with the entry connection of import pipeline.

In some embodiments of the present application, the inner diameter of the connecting tube is equal to or greater than the outer diameters of the first capillary tube and the second capillary tube.

In some embodiments of the present application, the second capillary tube is in communication with the inlet line via a transition tube; the second capillary tube is partially positioned in the top air duct, partially positioned outside the top air duct, the transition tube is positioned in the top air duct, the tube diameter of the transition tube is gradually increased along the direction from the second capillary tube to the inlet pipeline, and the inner diameter of the end part of the transition tube, which is close to the second capillary tube, is larger than or equal to the outer diameter of the second capillary tube.

In some embodiments of the present application, the outlet line includes a body portion and an extension portion that are connected to each other, the body portion being located in the top duct and parallel to the evaporator body, the body portion being connected to the evaporator body, the extension portion extending out of the top duct and perpendicular to the evaporator body, the extension portion being connected to the return line.

In some embodiments of the present application, the rear end of the top duct has a rear cover plate; the rear cover plate is provided with a clamping groove with an upward opening, and the part of the outlet pipeline extending out of the top air duct is clamped in the clamping groove;

and the part of the second capillary tube extending out of the top air duct is clamped in the clamping groove.

In some embodiments of the present application, the evaporator is disposed obliquely downward from front to back.

In some embodiments of the present application, the refrigerator further includes a water tray disposed below the evaporator, the water tray being disposed obliquely together with the evaporator;

the front end of the water pan is provided with a buckle, the front end of the evaporator main body is provided with a flanging, and the flanging is clamped with the buckle.

In some embodiments of the present application, the refrigerator further includes a water pan disposed below the evaporator, and a heating pipe;

the outer surface of the evaporator main body is provided with a containing groove;

the heating pipe comprises a first heating part arranged in the accommodating groove and a second heating part which is positioned on the water receiving disc and positioned at the periphery of the water receiving disc.

In some embodiments of the present application, the first heating portion comprises a plurality of U-shaped tube segments connected end to end;

the periphery of the water receiving disc is provided with a plurality of turnover parts at intervals, and the turnover parts can be turned over relative to the second heating parts to fix the second heating parts.

In some embodiments of the present application, the refrigerator includes a drain pipe, the drain pipe is located at the rear end of the water receiving tray and is communicated with the water receiving tray, and a portion of the second heating portion extends into the drain pipe.

According to the technical scheme, the invention has at least the following advantages and positive effects:

according to the refrigerator disclosed by the invention, the outlet pipeline of the evaporator extends out of the top air channel, so that the reflux pipeline and the outlet pipeline of the evaporator are convenient to install, and the installation efficiency is improved. And a second capillary tube is further arranged at the inlet of the evaporator, and the refrigerant backflow during defrosting is effectively prevented by the secondary throttling action of the first capillary tube and the second capillary tube of the throttling system, so that the problem that the inlet of the evaporator is frozen is solved.

Drawings

Fig. 1 is a front view of a refrigerator according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of the structure of the air duct assembly, evaporator, water receiving device, heating pipe, return line and throttle system of the present invention.

Fig. 3, fig. 4 and fig. 5 are schematic views of the evaporator, the heating pipe and the water receiving device according to the present invention from different angles.

FIG. 6 is a schematic view of the evaporator of the present invention disposed obliquely in the top tunnel.

Fig. 7 is a schematic diagram of a throttle system in accordance with the present invention.

The reference numerals are explained as follows:

1. a tank liner; 11. a door; 12. a compressor; 13. a condenser; 14. drying the filter;

21. a bottom cover plate; 22. a blower;

3. an evaporator; 31. an evaporator body; 311. a side plate; 3111. a clamping groove; 32. an inlet line; 33. an outlet line;

41. a water receiving tray; 411. a buckle; 412. turning over the edge; 42. a drain pipe;

5. heating pipes; 51. a first heating section; 52. a second heating section;

6. a return line;

7. a throttle system; 71. a first capillary; 72. a connecting pipe; 73. a second capillary; 74. a transition pipe.

Detailed Description

Exemplary embodiments that embody features and advantages of the present invention will be described in detail in the following description. It will be understood that the invention is capable of various modifications in various embodiments, all without departing from the scope of the invention, and that the description and illustrations herein are intended to be by way of illustration only and not to be construed as limiting the invention.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

For convenience of description and understanding, a direction of the refrigerator facing a user is a front direction and a direction facing away from the user is a rear direction with reference to a state of the refrigerator when the refrigerator is placed vertically; the width direction of the refrigerator is the left-right direction, and the height direction of the refrigerator is the vertical direction.

In the related art, an inlet pipeline and an outlet pipeline of the evaporator are both positioned in the top air duct, so that the installation is troublesome and the efficiency is lower. However, if the inlet pipeline and the outlet pipeline are both arranged outside the top air duct, the part of the inlet pipeline outside the top air duct cannot receive heat during defrosting, and liquid refrigerant can flow back to the inlet pipeline without a liquid reservoir, so that frosting of the inlet pipeline is aggravated.

Therefore, the refrigerator is simple to install, and the inlet pipeline cannot be frosted.

The invention provides a refrigerator, which comprises a refrigerator liner 1, an air duct component, an evaporator 3, a return pipeline 6, a water receiving device and a throttling system 7.

The outer appearance of the liner 1 is approximately rectangular parallelepiped. A plurality of refrigeration compartments, such as a freezing chamber, a refrigerating chamber, a temperature changing chamber and the like, are arranged in the box liner 1 so as to be used according to different use requirements. The front side of the container 1 is provided with an opening and a door 11 for opening and closing the opening, and each refrigerating compartment is further used by opening the door 11.

A compressor 12, a condenser 13 and a drier-filter 14 are arranged in the tank 1. When the compressor 12 is started, the refrigerant is compressed by the compressor 12, cooled by the condenser 13, dried and filtered by the drying filter 14, and finally enters the evaporator 3 to absorb the heat of the medium around the evaporator 3 through the throttling system 7, so as to provide cold for each refrigeration compartment for refrigeration.

The air duct component is arranged at the top of the box liner 1 and specifically comprises an upper foam structure, a lower foam structure, a bottom cover plate 21 arranged below the lower foam structure, a rear cover plate positioned at the rear end of the bottom cover plate 21 and a fan 22. The upper foam mechanism and the lower foam mechanism are separated to form a top air channel, and the rear cover plate and the fan 22 are arranged at the rear end of the box liner 1.

The back cover plate is provided with a clamping groove with an upward opening and a mounting hole, and the mounting hole and the clamping groove are arranged at intervals along the left-right direction. The fan 22 is mounted at the mounting hole and communicates with the top duct.

Fig. 2 shows a schematic structural diagram of the air duct assembly, the evaporator 3, the water receiving device, the heating pipe 5, the return line 6 and the throttling system 7, and fig. 3, 4 and 5 show schematic diagrams of the evaporator 3, the heating pipe 5 and the water receiving device from different view angles.

The evaporator 3 is used for absorbing heat of air and continuously generating cold air, and is sent into each refrigerating compartment through the fan 22 to perform refrigeration. Specifically, with reference to fig. 2, 3, 4 and 5, the evaporator 3 includes an evaporator body 31, an inlet line 32 and an outlet line 33.

The evaporator body 31 is disposed in the top air duct, and specifically includes at least one evaporation coil, a plurality of rows of fins inserted on each evaporation coil, and two side plates 311. The two side plates 311 are arranged on the left and right sides of the evaporation coil, and each side plate 311 extends along the front-rear direction.

An inlet line 32 is located in the top tunnel and is connected to the evaporator body 31, specifically to the inlet of the evaporation coil.

The outlet line 33 is connected to the evaporator body 31, in particular to the outlet of the evaporation coil. Wherein the outlet line 33 is partially located in the top tunnel and partially extends out of the top tunnel.

Specifically, the outlet line 33 includes a main body portion and an extension portion that are connected to each other. The main body part is positioned in the top air duct and parallel to the evaporator main body 31, and the main body part is connected with the evaporator main body 31. In this embodiment, the main body portion extends in the left-right direction.

The extension extends out of the top tunnel and perpendicular to the evaporator body 31. The extension part is provided with a bending structure, and comprises a part extending along the front-back direction and a part extending along the vertical direction, so that the extension part extends out of the top air duct.

The extension of the outlet line 33 is snapped into the catch groove of the back cover. Specifically, the bending part of the extension part is just positioned in the clamping groove.

Fig. 6 shows a schematic view of the evaporator 3 being arranged obliquely in the top tunnel.

Referring to fig. 6, the evaporator 3 is disposed obliquely downward from front to rear. Specifically, the included angle α between the evaporator 3 and the horizontal plane L is 27 ° or more.

In this embodiment, the evaporator 3 is an air-cooled frostless system, which can defrost regularly, so as to effectively ensure the refrigeration efficiency.

The water receiving device comprises a water receiving tray 41 and a drain pipe 42, wherein the water receiving tray 41 is used for receiving frost water and ice cubes generated by defrosting the evaporator 3, and the frost water and ice cubes are discharged from the drain pipe 42.

The water pan 41 is disposed below the evaporator 3 and is fixedly connected to the evaporator 3 such that the water pan 41 is disposed obliquely downward from front to back along with the evaporator 3. The inclined arrangement of the water pan 41 allows the frost water and ice cubes to flow in an inclined direction, which is more convenient for discharge.

Specifically, the water pan 41 includes a bottom plate, and a front side wall provided at the front end of the bottom plate, a rear side wall provided at the rear end of the bottom plate, a left side wall provided at the left side of the bottom plate, and a right side wall provided at the right side of the bottom plate. And the front side wall, the rear side wall, the left side wall and the right side wall all protrude upwards from the bottom plate.

In this embodiment, the left and right ends of the front sidewall are provided with the buckles 411. The front ends of the two side plates 311 of the evaporator 3 are respectively provided with a clamping groove 3111, and the clamping buckles 411 are clamped with the clamping grooves 3111 to realize the connection between the evaporator 3 and the water pan 41, so that the evaporator 3 and the water pan 41 are kept stable along the front-back direction.

In other embodiments, the left and right ends of the front side wall are provided with insertion holes, the front end of the side plate 311 is provided with insertion tongues, and the insertion tongues are inserted into the insertion holes to realize the clamping connection between the evaporator 3 and the water receiving disc 41. The drain pipe 42 is provided at the rear end of the water pan 41 and communicates with the water pan 41, so that water in the water pan 41 is discharged outside through the drain pipe 42. Specifically, the drain pipe 42 includes an upper pipe section and a lower pipe section that are vertically distributed, and the upper pipe section and the lower pipe section may be integrally formed by using an injection mold, or may be in a split splicing structure. The top of the upper pipe section is connected to the water pan 41 so that the frost water and ice cubes in the water pan 41 can enter. The lower pipe section is positioned at the bottom of the upper pipe section and extends downward to drain the frost water and ice cubes or collect the frost water and ice cubes in a water receiving box (not shown) at the bottom pipe opening of the lower pipe section.

In this embodiment, the water receiving tray 41 is inclined to the side of the drain pipe 42, and the side of the water receiving tray 41 near the drain pipe 42 has a guiding portion extending into the drain pipe 42, so that frost water and ice cubes can be smoothly guided into the drain pipe 42 through the guiding portion.

The refrigerator further includes a heating pipe 5. The heating pipe 5 includes a first heating portion 51 and a second heating portion 52.

The first heating portion 51 is disposed on the surface of the evaporator 3 to heat the evaporator 3, so that the evaporator 3 is defrosted, and the refrigeration efficiency is effectively ensured. Wherein, the outer surface of the evaporator main body 31 is provided with a containing groove. Specifically, the upper and lower surfaces of the evaporator body 31 are provided with receiving grooves, and are formed on the fins. The first heating part 51 is clamped in the accommodating groove. In this embodiment, the accommodating groove includes a plurality of U-shaped grooves connected end to end, and the first heating portion 51 includes a plurality of U-shaped pipe sections connected end to end.

The second heater is located on the water receiving tray 41 for heating the water receiving tray 41. The frost water falling in the water receiving tray 41 may be re-frozen into ice if not timely discharged into the drain pipe 42, so the ice can be further melted by heating the water receiving tray 41 through the second heating portion 52, the frost water is prevented from being frozen, and the defrosting effect is effectively ensured. Specifically, the second heating portion 52 is located at the periphery of the water receiving tray 41.

The periphery of the water pan 41 is provided with a plurality of turnover parts at intervals, and the turnover parts can be turned over relative to the heating pipe 5 to fix the second heating part 52. In this embodiment, the rear side wall of the water pan 41, the rear end of the left side wall and the rear end of the right side wall are provided with turnover parts, and the turnover parts extend upward beyond the rear side wall, the left side wall and the right side wall. When the second heating portion 52 is fixed, the turnover portion is turned down to press the second heating portion 52 for fixation.

Further, the second heating portion 52 further extends into the upper pipe section of the drain pipe 42, so that the ice cubes accumulated at the drain pipe 42 and the water receiving tray 41 can be melted smoothly and discharged smoothly.

The return line 6 is located at the rear of the tank 1 and outside the top air duct. Specifically, the return line 6 has two ends, a first end and a second end, respectively, wherein the first end is connected to the outlet line 33 and the second end is connected to the compressor 12 and thus to the condenser 13. Since the outlet line 33 extends outside the top tunnel, the return line 6 and the outlet line 33 can be mounted outside the top tunnel.

That is, after the evaporator 3 and the air duct assembly are mounted, the return line 6 and the outlet line 33 are welded outside the top air duct. Compared with the prior art that the connection between the return pipe 6 and the outlet pipe 33 is positioned in the top air channel, the return pipe 6 and the outlet pipe 33 are required to be welded firstly and then installed in the top air channel, and finally the air channel component is installed, the refrigerator is higher in assembly efficiency, and the welding quality outside the top air channel is higher, so that the quality of the refrigerator is improved.

The throttling system 7 is used for reducing pressure and throttling, so that the backflow of the refrigerant during defrosting of the evaporator 3 is effectively prevented, and icing at the inlet and outlet positions of the evaporator 3 is avoided. Wherein the throttle system 7 is located between the evaporator 3 and the drier-filter 14 in the direction of the air flow.

Specifically, the throttle system 7 includes a first capillary tube 71, a connection tube 72, a second capillary tube 73, and a transition tube 74.

The first capillary 71 is located outside the top air channel and attached to the periphery of the return pipeline 6, so as to realize contact heat exchange, and heat the return pipeline 6 to avoid icing.

Specifically, the first capillary tube 71 has an inlet and an outlet at both ends, respectively, and the inlet is connected to the dry filter 14, i.e., to the condenser 13, to receive the refrigerant.

The connection pipe 72 is connected to the outlet of the first capillary 71, i.e., the connection pipe 72 is disposed downstream of the first capillary 71.

The second capillary 73 is disposed downstream of the connection pipe 72, i.e., the connection pipe 72 connects the first capillary 71 and the second capillary 73. The inner diameter of the connection pipe 72 is greater than or equal to the outer diameter of the first capillary 71, and the inner diameter of the connection pipe 72 is greater than or equal to the outer diameter of the second capillary 73.

The connection pipe 72 is spaced from the return line 6.

In this embodiment, the outer diameters of the first capillary 71 and the second capillary 73 are the same, and the pipe diameters of the connection pipes 72 are the same. Illustratively, the outer diameters of the first and

second capillaries

71, 73 are each 1.8mm, and the inner diameter of the connecting tube 72 is 1.9mm, with an outer diameter of 3.2mm.

The second capillary 73 is located partially outside the top tunnel and partially inside the top tunnel, i.e. the second capillary 73 extends from inside the top tunnel to outside the top tunnel. Specifically, the second capillary 73 includes an inner tube segment, an outer tube segment, and an intermediate tube segment connecting the inner tube segment and the outer tube segment. Wherein, form the kink between middle tube segment and the outside tube segment, the kink card is put in the draw-in groove department of back shroud, namely second capillary 73 and export pipeline 33 all card are put in this draw-in groove department to stretch out the top wind channel from this draw-in groove department.

In this embodiment, the outer tube section extends vertically, the intermediate tube section extends in the front-rear direction, and the inner tube section extends in the left-rear direction.

The transition pipe 74 is disposed downstream of the second capillary 73, connects the second capillary 73 and the inlet pipe 32 of the evaporator 3, and the pipe diameter of the transition pipe 74 gradually increases in the direction from the second capillary 73 to the inlet pipe 32. Specifically, the transition tube 74 is connected to the inner tube section.

Typically, the pipe diameter of the inlet pipe 32 differs greatly from the pipe diameter of the second capillary 73, and the pipe diameter of the inlet pipe 32 is 8mm by way of example, so that the inlet pipe 32 and the second capillary 73 cannot be directly welded and are connected by way of the transition pipe 74.

The inner diameter of the end part of the transition tube 74, which is close to the second capillary tube 73, is larger than or equal to the outer diameter of the second capillary tube 73, namely, the transition tube 74 is sleeved on the periphery of the second capillary tube 73, so that welding is realized. The transition tube 74 is sleeved with the inlet pipeline 32 so as to realize connection.

In this embodiment, the transition pipe 74 is formed by mutually splicing a plurality of pipe sections with sequentially increased pipe diameters. In other embodiments, the transition tube 74 may be integrally formed.

The depressurization throttling principle of the throttling system 7 is as follows: the flow direction of the refrigerant fed by the drier-filter 14 in the throttle system 7 is as follows: the first capillary 71→the connection pipe 72→the second capillary 73→the transition pipe 74→the inlet pipe 32→the evaporator main body 31→the outlet pipe 33.

The refrigerant flowing to the outlet line 33 flows back into the condenser 13 via the return line 6, thereby forming a circulation of the refrigerant.

The first capillary tube 71 and the second capillary tube 73 are used for decompressing the high-pressure refrigerant liquid to the low-temperature low-pressure liquid, and play a role of decompression and throttling.

The first capillary tube 71 is positioned outside the return pipeline 6 and is in contact heat exchange with the return pipeline 6, so that the freezing in the return pipeline 6 is avoided. The return line 6 and the first capillary tube 71 together form a return line.

The refrigerant is throttled by the first capillary tube 71 and then enters the evaporator 3 by the throttle effect of the second capillary tube 73. That is, the second capillary tube 73, the transition tube 74, and the inlet line 32 can be understood to collectively constitute the inlet end of the evaporator body 31.

The second capillary tube 73 has a small inner diameter and is connected to the inlet line 32 of the evaporator 3, so that the refrigerant can be effectively prevented from flowing back during defrosting. Because the inlet pipeline 32 of the evaporator 3 and the transition pipe 74 have relatively large pipe diameters, the refrigerator has low temperature during normal operation and is easy to freeze. When the refrigerator is defrosted, partial refrigerant is not completely gasified in the evaporator 3, and the phenomenon of frosting near the inlet of the evaporator 3 is caused by the refrigerant backflow when the refrigerant flows back downwards under the action of gravity of a pipeline of the evaporator 3. The refrigerant back flow at the time of defrosting can be effectively prevented by the second capillary tube 73 having a smaller inner diameter, and thus, the inlet position is not frozen.

Based on the above description, the outlet pipe 33 extends out of the top air duct in this embodiment, so that the installation of the return pipe 6 and the outlet pipe 33 of the evaporator 3 is convenient, and the installation efficiency is improved. Further, the second capillary tube 73 is arranged at the inlet of the evaporator 3, and the refrigerant is effectively prevented from flowing back during defrosting through the secondary throttling action of the first capillary tube 71 and the second capillary tube 73 of the throttling system 7, so that the problem that the inlet of the evaporator 3 is frozen is solved.

While the invention has been described with reference to several exemplary embodiments, it is to be understood that the terminology used is intended to be in the nature of words of description and of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims

1. A refrigerator, comprising:

a top air duct;

2. The refrigerator of claim 1, wherein an inner diameter of the connection pipe is equal to or larger than outer diameters of the first capillary and the second capillary.

3. The refrigerator of claim 1, wherein the second capillary tube is in communication with the inlet line through a transition tube; the second capillary tube is partially positioned in the top air duct, partially positioned outside the top air duct, the transition tube is positioned in the top air duct, the tube diameter of the transition tube is gradually increased along the direction from the second capillary tube to the inlet pipeline, and the inner diameter of the end part of the transition tube, which is close to the second capillary tube, is larger than or equal to the outer diameter of the second capillary tube.

4. The refrigerator of claim 1, wherein the outlet line includes a body portion and an extension portion connected to each other, the body portion being located in the top duct and parallel to the evaporator body, the body portion being connected to the evaporator body, the extension portion extending out of the top duct and perpendicular to the evaporator body, the extension portion being connected to the return line.

5. The refrigerator of claim 4, wherein a rear end of the top duct has a rear cover plate; the rear cover plate is provided with a clamping groove with an upward opening, and the part of the outlet pipeline extending out of the top air duct is clamped in the clamping groove;

6. The refrigerator of claim 1, wherein the evaporator is disposed obliquely downward from front to rear.

7. The refrigerator of claim 6, further comprising a water pan disposed below the evaporator, the water pan being disposed obliquely with the evaporator;

8. The refrigerator of claim 6, further comprising a water pan disposed below the evaporator, and a heating tube;

9. The refrigerator of claim 8, wherein the first heating portion comprises a plurality of U-shaped tube segments connected end to end;

10. The refrigerator of claim 8, wherein the refrigerator includes a drain pipe at a rear end of the water tray and communicating with the water tray, and a portion of the second heating portion extends into the drain pipe.