CN219913633U - Refrigerator with a refrigerator body - Google Patents

Abstract

The utility model provides a refrigerator which is provided with a refrigerator body, a refrigerating assembly, a water receiving disc and an anode piece. The refrigeration assembly comprises a compressor, a condenser and an evaporator, and a defrosting evaporation pipe is connected between the condenser and the compressor. The defrosting evaporation pipe is immersed in the defrosting water of the defrosting water pan. The first section on the anode part is connected to the part of the defrosting evaporating pipe, which is higher than the defrosting water, and the second section is immersed in the defrosting water of the water receiving disc. The defrosting evaporation pipe and the anode piece are both made of metal, and the metal activity of the anode piece is larger than that of the defrosting evaporation pipe. Therefore, a closed loop is formed among the defrosting evaporation tube, the anode piece and defrosting water in the water receiving disc, and the defrosting evaporation tube and the anode piece perform electrochemical reaction in the defrosting water, so that corrosion generated in the defrosting evaporation tube dipping process in the defrosting water is avoided by dissolving the anode piece, and the service life of the defrosting evaporation tube is prolonged.

Description

Refrigerator with a refrigerator body

Technical Field

The utility model relates to the technical field of refrigerators, in particular to a refrigerator.

Background

The air-cooled refrigerator can generate frost water when periodically defrosting. In order to timely discharge and evaporate the defrosting water, a water receiving tray is generally arranged in the press bin, and a part of the condenser (commonly called as defrosting evaporation pipe in the industry) is arranged in the water receiving tray so as to be immersed in the defrosting water. The mode can heat and evaporate the defrosting water by utilizing the heat of the condenser, so that the defrosting water does not overflow; meanwhile, the condensing temperature can be reduced, and the heat dissipation function of the condenser is enhanced, so that the power consumption of the whole machine is reduced.

At present, more than 90% of defrosting evaporating pipes used in the refrigerator are steel pipes, and the defrosting evaporating pipes are easy to corrode and abrade in the use process, so that the service life of the defrosting evaporating pipes is influenced. In order to cope with the problems of corrosion of the defrosting evaporation tube, the defrosting evaporation tube needs to be preserved. The existing technology is to carry out the surface treatment on the surface of the defrosting evaporating pipe by the technologies of galvanization copper plating, army green passivation, electrophoresis, paint spraying, thermal shrinkage sleeve coating, polymer coating (such as polyamide) bonding and the like.

However, the electroplated layer or the oxide layer on the surface of the defrosting evaporation tube is extremely thin, and the surface is easy to damage during production and assembly, so that the local corrosion prevention is invalid; the ductility of the paint film is poorer than that of the metal pipe, and the paint film is easy to crack in the bending process; the temperature is uneven when the heat shrinkage sleeve is sintered, the overburden part is easy to age, and the corrosion prevention efficiency of the defrosting evaporation tube is also easy to be affected; in addition, the polymer has certain water absorption, and the material loses tightness after aging in the repeated water absorption and loss processes. Therefore, the process can only delay the corrosion of the defrosting evaporation tube to a certain extent, and cannot avoid the corrosion of the defrosting evaporation tube.

Disclosure of Invention

The utility model aims to provide a refrigerator which provides a reliable corrosion prevention for a defrosting evaporation pipe so as to prolong the service life of the defrosting evaporation pipe.

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

a refrigerator includes: the refrigerator comprises a box body, a refrigerator body and a control device, wherein the box body comprises a refrigerating compartment with an opening at the front side, an evaporator compartment arranged at the rear side of the refrigerating compartment and a press bin arranged below the evaporator compartment; a refrigeration assembly including a compressor, a condenser, and an evaporator; the compressor and the condenser are arranged in the press bin; the evaporator is arranged in the evaporator chamber; one end of the condenser is provided with a defrosting evaporation pipe which is communicated with an outlet of the compressor and used for conveying a refrigerant into the condenser; the defrosting evaporating pipe is a metal pipe; a water pan for receiving defrosting water flowing out of the evaporator chamber; the defrosting evaporating pipe is used for being immersed in defrosting water in the water receiving disc, and the two ends of the defrosting evaporating pipe are higher than the liquid level of the defrosting water; and an anode member which is a metal member; the metal activity of the anode part is larger than that of the defrosting evaporation pipe; the anode piece comprises a first section used for being connected with the defrosting evaporating pipe and a second section used for being immersed in defrosting water in the water receiving disc; the first section is contacted and fixed at a part of the defrosting evaporation pipe, which is higher than defrosting water.

In one embodiment of the utility model, the defrosting evaporation pipe comprises a water immersion section for being immersed in defrosting water and a connecting section higher than the defrosting water; the first section of the anode element is connected to the connecting section; at least the immersed section is provided with an anti-corrosion coating, and the anti-corrosion coating covers the outer peripheral side of the immersed section.

In one embodiment of the present utility model, the first section of the anode member is provided with a clamping portion for clamping and sleeving the connecting section.

In one embodiment of the present utility model, the clamping portion is a ring provided with an opening in a radial direction, so that the ring can be clamped on the connecting section through the opening.

In one embodiment of the utility model, the second section is provided with a bend such that the second section is circuitously arranged.

In one embodiment of the utility model, the defrosting evaporation pipe is a steel pipe.

In one embodiment of the present utility model, the anode member is an aluminum member or a zinc member.

In one embodiment of the utility model, the refrigerator further comprises a drain pipe; the upper end of the drain pipe is communicated with the bottom of the evaporator chamber, and the lower end of the drain pipe stretches into the water receiving disc so as to be used for guiding defrosting water into the water receiving disc.

In one embodiment of the utility model, a clamping piece is further arranged in the water receiving disc; the soaking section and the second section are fixed in the water receiving disc through the clamping piece.

In one embodiment of the utility model, the number of the snap-in members is set to be plural.

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

in the utility model, the refrigerator is provided with a refrigerator body, a refrigerating assembly, a water receiving disc and an anode piece. The box body comprises a refrigerating compartment with an opening at the front side, an evaporator chamber arranged at the rear side of the refrigerating compartment and a press bin arranged below the evaporator chamber. The refrigeration assembly comprises a compressor, a condenser and an evaporator, wherein one end of the condenser is provided with a defrosting evaporation pipe, and the other end of the defrosting evaporation pipe is communicated with an outlet of the compressor so as to convey a refrigerant. The defrosting evaporation pipe is immersed in the defrosting water of the defrosting water pan, and the two ends of the defrosting evaporation pipe are higher than the liquid level of the defrosting water. The first section on the anode part is connected to the part of the defrosting evaporating pipe, which is higher than the defrosting water, and the second section is immersed in the defrosting water of the water receiving disc. The defrosting evaporation pipe and the anode piece are both made of metal, and the metal activity of the anode piece is larger than that of the defrosting evaporation pipe. Therefore, a closed loop is formed among the defrosting evaporation pipe, the anode piece and defrosting water in the water receiving disc, the defrosting evaporation pipe and the anode piece are subjected to electrochemical reaction in the defrosting water, so that the anode piece is dissolved into metal ions and is expanded into the defrosting water, hydrogen ions in the defrosting water are obtained on the defrosting evaporation pipe contacted with the defrosting water to generate electrons, and hydrogen is produced and diffused into air, so that corrosion of the defrosting evaporation pipe in the defrosting water immersing process is avoided by dissolving the anode piece, and the service life of the defrosting evaporation pipe is prolonged.

Drawings

Fig. 1 is a schematic view of a refrigerator according to an embodiment of the present utility model.

Fig. 2 is a sectional view of a water immersion section in a defrosting evaporating pipe of the refrigerator of fig. 1.

Fig. 3 is a schematic view of a principle of corrosion prevention of a primary battery of the refrigerator of fig. 1.

Fig. 4 is a schematic view of an anode member of the refrigerator of fig. 1.

Fig. 5 is a schematic connection diagram of an anode member and a connection section of the refrigerator of fig. 1.

Fig. 6 is a schematic view of a water tray of the refrigerator of fig. 1.

The reference numerals are explained as follows:

10-a press bin; 11-a compressor; 20-defrosting evaporating pipes; 21-soaking section; 22-connecting segments; 23-an anti-corrosion coating; 30-a water receiving disc; 31-a clip; 32-a water receiving end; 40-anode member; 41-a first section; 42-a second section; 43-a clamping part; 44-opening; 45-circular ring; 46-bending parts; 50-drain pipe.

Detailed Description

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

In the description of the present utility model, it should be understood that in the embodiments shown in the drawings, indications of directions or positional relationships (such as up, down, left, right, front, rear, etc.) are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the description of the position of these elements changes, the indication of these directions changes accordingly.

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 utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

When the refrigerator operates, the working environment of the defrosting evaporating pipe has the following characteristics: (1) The temperature of the refrigerant flowing in the defrosting evaporation pipe is higher and is usually 50-80 ℃; (2) The injection temperature of defrosting water is close to 0 ℃, and the temperature difference between the inside and the outside of the defrosting evaporation tube is larger; (3) The defrosting evaporation tube is in a dry state before defrosting and is immersed by defrosting water after defrosting; (4) The defrosting evaporation tube is fixed by using a buckle and other modes when being installed, so that damage is easy to occur; (5) When the compressor works, vibration drives the defrosting evaporation pipe and the fixing structure of the water receiving disc to generate friction, so that abrasion is generated between the defrosting evaporation pipe and the fixing structure. Therefore, the above-mentioned cold and hot, dry and wet alternating bad working environment, and the installation mode of defrosting evaporating pipe and the influence such as vibrations when compressing work, make defrosting evaporating pipe appear corroding and wearing and tearing easily, finally lead to refrigerator refrigerant to reveal, can't refrigerate. Market maintenance data shows that defrosting evaporating pipe corrosion is the third largest cause of refrigerator refrigerant leakage except for welding spot leakage and aluminum evaporator corrosion. In addition, microscopic damage which occurs in the processing and mounting processes cannot be distinguished by naked eyes, and a scientific test means is not used for piece-by-piece inspection. The simple pipeline treatment process cannot ensure that the evaporating pipe is not corroded in the long-term use process of the refrigerator. Therefore, a refrigerator has been proposed to solve the above problems.

The scheme is further illustrated by the following examples:

referring to fig. 1, the refrigerator of the present embodiment includes a cabinet, a refrigeration assembly, a water tray 30, and an anode member 40. The case includes a refrigerating compartment, an evaporator compartment, and a press bin 10, and an opening is provided at a front side of the refrigerating compartment to facilitate storage or taking of articles. An evaporator chamber is provided at the rear side of the refrigeration compartment, and a press house 10 is provided below the evaporator chamber. The refrigeration assembly includes a compressor 11, a condenser, and an evaporator, with the compressor 11 and condenser being disposed within the compressor compartment 10 and the evaporator being disposed within the evaporator compartment. I.e. the refrigeration assembly performs refrigeration by means of the interaction of the compressor 11, the condenser and the evaporator.

In the present embodiment, one end of the condenser is provided with a defrosting evaporation pipe 20, and the other end of the defrosting evaporation pipe 20 communicates with the outlet of the compressor 11 for delivering refrigerant into the condenser. It should be noted that, the defrosting evaporation tube 20 is a metal tube to ensure the structural strength of the defrosting evaporation tube 20. Meanwhile, the water receiving tray 30 is used for receiving the defrosting water flowing out of the evaporator chamber, so as to prevent the defrosting water from wetting other electronic components of the refrigerator and causing short circuit. In addition, a part of the defrosting evaporation tube 20 is installed in the defrosting water tray 30 and immersed in defrosting water in the defrosting water tray 30, so that evaporation of the defrosting water in the defrosting water tray 30 is accelerated and the temperature of the cooling medium in the defrosting evaporation tube 20 is reduced by heat in the cooling medium conveyed in the defrosting evaporation tube 20, thereby saving cooling work of the compressor 11 and achieving the purposes of saving energy and reducing power consumption.

It should be noted that, both ends of the defrosting evaporation tube 20 are higher than the liquid level of the defrosting water, so as to avoid the two ends of the defrosting evaporation tube 20 from being corroded by the defrosting water. Of course, in other embodiments, both ends of the defrosting evaporator tube 20 may be lower than the liquid level of the defrosting water, for example, both ends of the defrosting evaporator tube 20 protrude from the side wall of the defrosting tray 30 to the defrosting tray 30. However, it is required that both ends of the defrosting evaporator pipe 20 are not immersed in the defrosting water, so that both ends of the defrosting evaporator pipe 20 are not corroded by the defrosting water of the defrosting evaporator pipe 20. In the present embodiment, the defrosting evaporating pipe 20 is a steel pipe to reduce the manufacturing cost of the defrosting evaporating pipe 20.

As shown in fig. 1, the anode member 40 includes a first section 41 for connecting the defrosting evaporation pipe 20, and a second section 42 for being immersed in the defrosting water in the defrosting pan 30, and the first section 41 is contacted and fixed at a position higher than the defrosting water in the defrosting evaporation pipe 20.

In addition, the anode member 40 is a metal member, and the metal activity of the anode member 40 is greater than that of the defrosting evaporator tube 20. Therefore, when the defrosting water exists in the defrosting pan 30, a primary cell is constituted between the defrosting evaporation pipe 20, the anode part 40 and the defrosting water, as shown in fig. 3. And because the metal activity of the anode member 40 is greater than that of the defrosting and evaporating tube 20, the anode member 40 forms the anode of the primary cell, and the defrosting and evaporating tube 20 forms the cathode, so that the anode member 40 can ionize into metal ions to be dissolved in the defrosting water of the water receiving tray 30, and the hydrogen ions of the defrosting water can receive electrons on the defrosting and evaporating tube 20, so that hydrogen is generated and emitted into the air, and further, the defrosting and evaporating tube 20 is prevented from being dissolved in the defrosting and evaporating tube 20, namely, corrosion and damage of the defrosting and evaporating tube 20 are avoided, and the service time of the defrosting and evaporating tube 20 is prolonged.

Referring to fig. 1 and 2, in the present embodiment, the defrosting evaporation pipe 20 includes a submerged section 21 for being immersed in defrosting water, and a connecting section 22 higher than the defrosting water. Wherein, the soaking section 21 and the connecting section 22 are integrally arranged to ensure the structural strength and the sealing performance of the defrosting evaporator pipe 20. The first section 41 of the anode member 40 is connected to the connecting section 22. Since the connecting section 22 is higher than the water surface of the defrosting water, the connection part between the first section 41 and the connecting section 22 is also higher than the liquid surface of the defrosting water, so that at least a part of the space between the defrosting evaporation tube 20 and the anode part 40 is not immersed in the defrosting water, and the space among the defrosting evaporation tube 20, the anode part 40 and the defrosting water is ensured, and a primary cell can be formed.

In the present embodiment, at least the immersed section 21 is provided with the anticorrosive coating 23, and the anticorrosive coating 23 covers the outer peripheral side of the immersed section 21. The anti-corrosion coating 23 is used to protect the defrosting evaporator pipe 20 from corrosion of the defrosting evaporator pipe 20. In this embodiment, the anti-corrosion coating 23 may be provided as an electrophoretic paint or a thermal shrink wrap to form an anti-corrosion layer for the immersed section 21.

Since the defrosting water flows out of the evaporator chamber, i.e., is condensed during the operation of the evaporator, when the evaporator fails to condense the defrosting water, the defrosting water does not exist in the defrosting water receiving tray 30. At this time, the immersed section 21 of the defrosting evaporator tube 20 and the second section 42 of the anode member 40 located in the water tray 30 are not immersed in the defrosting water, and no primary cell is formed between the defrosting evaporator tube 20 and the anode member 40, so that the immersed section 21 of the defrosting evaporator tube 20 cannot be protected from corrosion by the principle of the primary cell. The anti-corrosion coating 23 can protect the immersed section 21 from corrosion caused by exposure of the immersed section 21 to air.

Of course, when the anti-corrosion coating 23 is in an intact state, even if the immersed section 21 is immersed in the defrosting water, the contact between the immersed section 21 and the defrosting water is isolated due to the existence of the anti-corrosion coating 23, so that a primary cell cannot be formed among the defrosting evaporation tube 20, the anode piece 40 and the defrosting water at the moment, and therefore, the immersed section 21 cannot be preserved by the principle of the primary cell. However, since the corrosion-resistant coating 23 is now in good condition, corrosion of the immersion section 21 by the defrost water can be avoided.

And when the corrosion protection coating 23 fails for some reason, such as: the corrosion-resistant coating 23 is worn or aged as the service time increases; or cracking and falling off are generated in the process of processing or installing the defrosting evaporation tube 20, a primary battery can be formed among the defrosting evaporation tube 20, the anode piece 40 and defrosting water at the moment, and the soaking section 21 is preserved by a primary battery principle, so that the preservation efficiency of the soaking section 21 is prolonged, the service life of the defrosting evaporation tube 20 is prolonged, the maintenance and replacement frequency of the defrosting evaporation tube 20 is reduced, and the safe operation of a refrigerator is ensured.

Referring to fig. 1 and 4, the first section 41 of the anode member 40 is provided with a clamping portion 43 for clamping and sleeving on the connecting section 22. Since the anode member 40 is a consumable, the defrosting evaporator tube 20 and the anode member 40 are subjected to primary corrosion protection, and consumed as an anode, so that the anode member 40 is in a worn state during operation. Therefore, the clamping part 43 is arranged on the first section 41, and the anode element 40 is clamped on the connecting section 22 of the defrosting and evaporating pipe 20 through the clamping part 43, so that the lost anode element 40 can be conveniently replaced, and the corrosion protection of the primary battery can be continuously carried out.

Referring to fig. 4 and 5, the clamping portion 43 is a ring 45 with an opening 44 in a radial direction, so that the ring 45 can be clamped on the connecting section 22 through the opening 44. In this embodiment, the ring 45 is a hollow ring-shaped member, and the inner wall of the ring is adapted to the shape of the connecting section 22, so that the clamping portion 43 can be clamped on the outer periphery of the connecting section 22, ensuring the stability of the connection between the anode member 40 and the defrosting and evaporating tube 20, and enabling electrical conduction between the defrosting and evaporating tube 20 and the anode member 40, so as to conduct electrons from the anode member 40 to the defrosting and evaporating tube 20.

In addition, it should be noted that the distance between the two side walls of the opening 44 should be smaller than the diameter of the inner ring of the ring 45, so that after the clamping portion 43 is clamped on the connecting section 22, the clamping portion 43 can be firmly clamped on the connecting section 22, so as to prevent the anode member 40 from falling from the defrosting evaporation tube 20 due to the influence of the gravity of the anode member 40.

It should be noted that, in other embodiments, the clamping portion 43 may be provided as a conductive clip or the like to clamp on the peripheral side of the connection section 22. Or by wrapping around, etc. the connection section 22.

In the present embodiment, the second section 42 is provided with a bent portion 46 such that the second section 42 is detoured. The second section 42 is provided with the bending portion 46, which can increase the length of the second section 42 in the limited space, thereby increasing the volume and the surface area of the second section 42, and further increasing the contact area between the second section 42 and the defrosting water.

In addition, in the present embodiment, the anode member 40 is an aluminum member or a zinc member. Of course, in other embodiments, the anode member 40 may be formed of other metal alloys having higher metal activity than iron to ensure that the galvanic cell between the defrosting evaporator tube 20, the anode member 40 and the defrosting water can react, and the anode member 40 acts as the anode of the galvanic cell.

Referring to fig. 1 and 6, the refrigerator further includes a drain pipe 50. The upper end of the drain pipe 50 communicates with the bottom of the evaporator chamber, and the lower end of the drain pipe 50 extends into the drip tray 30 for guiding the defrost water into the drip tray 30. In the present embodiment, the drain pipe 50 is a clinker hose to prevent the compressor 11 from vibrating to affect the connection of the drain pipe 50 to the evaporator chamber. The water receiving end 32 for connecting the drain pipe 50 is disposed in the water receiving tray 30, so that the drain pipe 50 can be fixed in the water receiving tray 30 to prevent the drain pipe 50 from shaking.

Referring to fig. 1 and 6, a snap fastener 31 is further disposed in the water pan 30, the soaking section 21 and the second section 42 are both fixed in the water pan 30 by the snap fastener 31, and the number of the snap fasteners 31 is plural. The soaking section 21 of the defrosting evaporator pipe 20 can be connected to the bottom of the water receiving tray 30 through the plurality of fastening pieces 31, and the soaking section 21 can be fastened to the bottom of the water receiving tray 30, so that the soaking section 21 is prevented from being separated from the water receiving tray 30 due to vibration of the compressor 11. Likewise, the second section 42 of the anode member 40 is also fastened to the bottom of the water tray 30 by a plurality of fastening members 31, so as to ensure that the second section 42 can keep fit to the bottom of the water tray 30, and the second section 42 can timely contact with the defrosting water in the water tray 30.

In summary, at least the water soaking section 21 of the defrosting and evaporating tube 20 is sprayed with the anti-corrosion coating 23, so that the defrosting and evaporating tube 20 can prevent the tube wall from corrosion and aging according to the anti-corrosion coating 23 when defrosting water is not formed or is absent. In addition, the soaking section 21 of the defrosting evaporator pipe 20 is installed in the water receiving tray 30, and the connection section 22 is connected to the first section 41 of the anode member 40, and the second section 42 of the anode member 40 is installed in the water receiving tray 30, so that the defrosting evaporator pipe 20, the anode member 40 and the defrosting water can form a primary cell when the defrosting water exists in the water receiving tray 30. Meanwhile, the metal activity of the anode part 40 is higher than that of the defrosting and evaporating pipe 20, so that the anode part 40 of the anode is corroded according to the principle of a primary battery, the defrosting and evaporating pipe 20 of the cathode is protected, and corrosion of the pipe wall of the defrosting and evaporating pipe 20 is reduced. Therefore, by providing the corrosion-preventing coating 23 and the anode member 40, supplementary corrosion prevention can be formed, thereby reducing the corrosion speed of the defrosting evaporator tube 20 and prolonging the service life of the defrosting evaporator tube 20. In addition, it should be noted that, the galvanic cell is formed between the anode member 40 and the defrosting and evaporating tube 20, so that the anode member 40 can form anti-corrosion protection for the defrosting and evaporating tube 20 by the principle of the galvanic cell formed with the defrosting and evaporating tube 20 under the condition that the anti-corrosion coating 23 is damaged by human beings and cannot be perceived, such as micro-cracking of the anti-corrosion coating 23 in the installation process of the defrosting and evaporating tube 20, so as to ensure the anti-corrosion efficiency of the defrosting and evaporating tube 20.

While the utility model 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 utility model 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 (10)

1. A refrigerator, comprising:

the refrigerator comprises a box body, a refrigerator body and a control device, wherein the box body comprises a refrigerating compartment with an opening at the front side, an evaporator compartment arranged at the rear side of the refrigerating compartment and a press bin arranged below the evaporator compartment;

a refrigeration assembly including a compressor, a condenser, and an evaporator; the compressor and the condenser are arranged in the press bin; the evaporator is arranged in the evaporator chamber; one end of the condenser is provided with a defrosting evaporation pipe which is communicated with an outlet of the compressor and used for conveying a refrigerant into the condenser; the defrosting evaporating pipe is a metal pipe;

a water pan for receiving defrosting water flowing out of the evaporator chamber; the defrosting evaporating pipe is used for being immersed in defrosting water in the water receiving disc, and the two ends of the defrosting evaporating pipe are higher than the liquid level of the defrosting water; and

an anode member which is a metal member; the metal activity of the anode part is larger than that of the defrosting evaporation pipe; the anode piece comprises a first section used for being connected with the defrosting evaporating pipe and a second section used for being immersed in defrosting water in the water receiving disc; the first section is contacted and fixed at a part of the defrosting evaporation pipe, which is higher than defrosting water.

2. The refrigerator of claim 1, wherein the defrosting evaporation pipe includes a submerged section for being immersed in defrosting water, and a connection section higher than the defrosting water; the first section of the anode element is connected to the connecting section; at least the immersed section is provided with an anti-corrosion coating, and the anti-corrosion coating covers the outer peripheral side of the immersed section.

3. The refrigerator of claim 2, wherein the first section of the anode member is provided with a clamping portion for clamping and fitting over the connection section.

4. The refrigerator of claim 3, wherein the clamping portion is a ring provided with an opening in a radial direction so that the ring can be clamped on the connection section through the opening.

5. The refrigerator of claim 1, wherein the second section is provided with a bent portion such that the second section is detoured.

6. The refrigerator of claim 1, wherein the defrosting evaporator pipe is a steel pipe.

7. The refrigerator of claim 1, wherein the anode member is an aluminum member or a zinc member.

8. The refrigerator of claim 1, further comprising a drain pipe; the upper end of the drain pipe is communicated with the bottom of the evaporator chamber, and the lower end of the drain pipe stretches into the water receiving disc so as to be used for guiding defrosting water into the water receiving disc.

9. The refrigerator of claim 2, wherein a snap fastener is further provided in the water tray; the soaking section and the second section are fixed in the water receiving disc through the clamping piece.

10. The refrigerator of claim 9, wherein the number of the snap pieces is set to be plural.