CN220959098U - Auxiliary defrosting structure of refrigerator and refrigerator - Google Patents

Abstract

The application relates to the technical field of refrigeration, and discloses an auxiliary defrosting structure of a refrigerator and the refrigerator. The auxiliary defrosting structure of the refrigerator comprises a return air pipeline which is arranged outside the inner container of the refrigerator, one end of the return air pipeline is connected with an air outlet of a refrigerating chamber of the refrigerator, and the other end of the return air pipeline is connected with an air inlet of a freezing chamber of the refrigerator; the precooling evaporator is attached to the outer wall of the return air pipeline. The application sets up the return air duct between air outlet of the refrigerator refrigerating chamber and air inlet of the refrigerator freezing chamber, and set up the precooling evaporator in the outer wall of the return air duct, make the high humidity cold air flowing out from the refrigerator refrigerating chamber flow into the freezing chamber after refrigerating through the precooling evaporator to accelerate the refrigerating speed of the freezing chamber, because the precooling evaporator is set up in the outer wall of the return air duct, make the high humidity cold air in the refrigerator refrigerating chamber unable to contact the precooling evaporator directly, make while reducing the frosting quantity of the freezing evaporator, can reduce the frosting quantity of the precooling evaporator at the same time, in order to reduce the defrosting frequency of the refrigerator.

Description

Auxiliary defrosting structure of refrigerator and refrigerator

Technical Field

The application relates to the technical field of refrigeration, in particular to an auxiliary defrosting structure of a refrigerator and the refrigerator.

Background

The high humidity foods such as vegetables and fruits are placed in the refrigerating chamber, so that the humidity of the refrigerating chamber is high, high humidity air enters the freezing evaporator through the refrigerating return air duct, frost is formed on the freezing evaporator, automatic defrosting treatment is performed when the frosting amount of the evaporator reaches a certain degree, the refrigerator is not refrigerated during defrosting, and the temperature of the refrigerator chamber rises; the larger the frosting amount of the freezing evaporator is, the more frequent the defrosting is, the longer the defrosting time is, and the worse the refrigerating effect of the refrigerator is.

In the related art, a dehumidifying evaporator is connected in series in a return air pipeline between a refrigerating chamber and a freezing evaporator, so that high-humidity air in the refrigerating chamber flows into the freezing chamber evaporator for refrigeration after being dehumidified, and then flows into the freezing chamber, and the frosting quantity of the freezing evaporator is reduced.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

The high humidity air in the refrigerating chamber flows into the freezing evaporator after being precooled by the dehumidifying evaporator, the frosting quantity of the freezing evaporator is not increased, but the frosting quantity of the dehumidifying evaporator is increased, and the defrosting is still needed when the frosting of the dehumidifying evaporator is excessive, so that the problem of basic defrosting is not solved.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the application and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.

Disclosure of utility model

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.

The embodiment of the disclosure provides an auxiliary defrosting structure of a refrigerator and the refrigerator, which are used for solving the problems that excessive frosting of an evaporator of the refrigerator affects the refrigerating effect and the like.

According to a first aspect of the present utility model, there is provided an auxiliary defrosting structure for a refrigerator, comprising: the air return pipeline is arranged outside the refrigerator liner, one end of the air return pipeline is connected with an air outlet of the refrigerator refrigerating chamber, and the other end of the air return pipeline is connected with an air inlet of the refrigerator freezing chamber; the precooling evaporator is attached to the outer wall of the return air pipeline.

Optionally, the refrigerator auxiliary defrosting structure further includes: the boss protrudes outwards from the side wall of the return air pipeline, so that the inner wall of the return air pipeline is recessed outwards to form a precooling groove; a water outlet is arranged at the bottom of the side wall of the precooling tank and is communicated with the inside and the outside of the return air pipeline; the precooling evaporator is attached to the outer wall of the boss.

Optionally, the refrigerator auxiliary defrosting structure further includes: and the drain pipe is communicated with the water outlet and the evaporation pan in the refrigerator press cabin.

Optionally, the drain pipe is connected with the water outlet in a plugging manner; one end of the drain pipe is inserted into the water outlet and is connected with the water outlet in a sealing way.

Optionally, the refrigerator auxiliary defrosting structure further includes: the water baffle is arranged on the lower wall of the pre-cooling tank and extends upwards to shield the notch at the lower part of the pre-cooling tank.

Optionally, the auxiliary defrosting structure of the refrigerator further comprises: and the heating structure is attached to the precooling evaporator.

Optionally, the heating structure comprises: the heat conducting disc is stuck to the precooling evaporator and is a sealing disc box; the heating wire is arranged in the sealing disc box; the connecting wire is connected with the heating wire and extends out from one end of the heat conducting disc to be connected with the refrigerator control part.

Optionally, the return air duct is disposed in the refrigerator foam layer.

Optionally, the auxiliary defrosting structure of the refrigerator further comprises: and the PE cotton is arranged at the joint of the return air pipeline and the refrigerator liner and used for sealing the joint of the return air pipeline and the refrigerator liner.

According to a second aspect of the present utility model there is provided a refrigerator comprising: a refrigerating chamber; the freezing chamber is arranged below the refrigerating chamber; the auxiliary defrosting structure for a refrigerator according to any one of the above embodiments, which is disposed in the foaming layer between the refrigerating chamber and the freezing chamber, wherein the upper end of the return air duct is connected to the refrigerating chamber, and the lower end is connected to the freezing chamber.

Optionally, the refrigerator includes a defrosting step of controlling the compressor to stop first, controlling the heating wire to start heating when the compressor stop time meets a preset time, and controlling the heating wire to stop heating when the temperature in the pre-cooling tank is detected to meet a defrosting stop temperature.

The refrigerator auxiliary defrosting structure and the refrigerator provided by the embodiment of the disclosure can realize the following technical effects:

Through setting up the return air duct between refrigerator fridge air outlet and refrigerator freezer air intake to set up precooling evaporator in the return air duct outer wall, make by the high humidity cold wind that refrigerator fridge indoor flows in the freezing room after precooling evaporator refrigeration and quickens freezing room refrigerating rate, simultaneously because precooling evaporator sets up in the return air duct outer wall, make the indoor high humidity cold wind of refrigerator fridge can not direct contact to precooling evaporator, make can reduce the frosting volume of precooling evaporator when reducing the frosting volume of freezing evaporator, in order to reduce refrigerator defrosting frequency.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:

Fig. 1 is a schematic view illustrating a structure of an auxiliary defrosting structure of a refrigerator according to an embodiment of the present disclosure;

Fig. 2 is a schematic view illustrating a structure of another view of an auxiliary defrosting structure of a refrigerator according to an embodiment of the present disclosure;

fig. 3 is a schematic diagram of a connection structure between a precooling evaporator and a heat-conducting plate according to an embodiment of the present disclosure;

Fig. 4 is a schematic structural view of a return air duct according to an embodiment of the present disclosure;

fig. 5 is a schematic view illustrating a structure in which an auxiliary defrosting structure of a refrigerator according to an embodiment of the present disclosure is installed in the refrigerator.

Reference numerals:

10: an auxiliary defrosting structure of the refrigerator; 11: a return air duct; 111: a first sidewall; 112: a second sidewall; 12: a pre-cooling evaporator; 13: a boss; 131: a pre-cooling tank; 1311: a water outlet; 14: a drain pipe; 15: a water baffle; 16: a heat conduction plate; 17: a heating wire; 18: a connecting wire; 19: PE cotton;

20: a refrigerator; 21: a refrigerating chamber; 211: an air outlet; 22: a freezing chamber; 221: an air inlet; 23: pressing a cabin; 24: an evaporation dish; 25: and (3) a foaming layer.

Detailed Description

So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.

The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are used primarily to better describe embodiments of the present disclosure and embodiments thereof and are not intended to limit the indicated device, element, or component to a particular orientation or to be constructed and operated in a particular orientation. Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the embodiments of the present disclosure will be understood by those of ordinary skill in the art in view of the specific circumstances.

In addition, the terms "disposed," "connected," "secured" and "affixed" are to be construed broadly. For example, "connected" may be in a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the embodiments of the present disclosure may be understood by those of ordinary skill in the art according to specific circumstances.

The term "plurality" means two or more, unless otherwise indicated.

In the embodiment of the present disclosure, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.

The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.

It should be noted that, without conflict, the embodiments of the present disclosure and features of the embodiments may be combined with each other.

The high humidity foods such as vegetables and fruits are placed in the refrigerating chamber, so that the humidity of the refrigerating chamber is high, high humidity air enters the freezing evaporator through the refrigerating return air duct, frost is formed on the freezing evaporator, automatic defrosting treatment is performed when the frosting amount of the evaporator reaches a certain degree, the refrigerator is not refrigerated during defrosting, and the temperature of the refrigerator chamber rises; the larger the frosting amount of the freezing evaporator is, the more frequent the defrosting is, the longer the defrosting time is, and the worse the refrigerating effect of the refrigerator is.

In the related art, a dehumidifying evaporator is connected in series in a return air pipeline between a refrigerating chamber and a freezing evaporator, so that high-humidity air in the refrigerating chamber flows into the freezing chamber evaporator for refrigeration after being dehumidified, and then flows into the freezing chamber, and the frosting quantity of the freezing evaporator is reduced. Because the high-humidity air in the refrigerating chamber flows into the freezing evaporator after being precooled by the dehumidifying evaporator, the frosting quantity of the freezing evaporator is not increased, but the frosting quantity of the dehumidifying evaporator is increased, and the defrosting is still needed when the frosting quantity of the dehumidifying evaporator is excessive, so that the problem of basic defrosting is not solved.

According to the embodiment of the disclosure, the air return pipeline is arranged between the air outlet of the refrigerator refrigerating chamber and the air inlet of the refrigerator freezing chamber, the precooling evaporator is arranged on the outer wall of the air return pipeline, so that high-humidity cold air flowing out of the refrigerator refrigerating chamber flows into the freezing chamber after being refrigerated by the precooling evaporator to accelerate the refrigerating speed of the freezing chamber, and meanwhile, the precooling evaporator is arranged on the outer wall of the air return pipeline, so that the high-humidity cold air in the refrigerator refrigerating chamber cannot be directly contacted with the precooling evaporator, the frosting quantity of the precooling evaporator can be reduced while the frosting quantity of the freezing evaporator is reduced, and the defrosting frequency of the refrigerator is reduced.

Referring to fig. 1 to 5, an embodiment of the present disclosure provides an auxiliary defrosting structure 10 for a refrigerator and a refrigerator 20.

According to a first aspect of the present utility model, there is provided an auxiliary defrost structure 10 for a refrigerator, comprising a return air duct 11 and a pre-cooling evaporator 12. The air return pipeline 11 is arranged outside the liner of the refrigerator 20, one end of the air return pipeline 11 is connected with an air outlet 211 of the refrigerating chamber 21 of the refrigerator 20, and the other end of the air return pipeline 11 is connected with an air inlet 221 of the freezing chamber 22 of the refrigerator 20; the precooling evaporator 12 is attached to the outer wall of the return air pipeline 11.

As shown in fig. 1 and 5, the refrigerating chamber 21 at the upper part of the refrigerator 20 is placed with high humidity foods such as vegetables and fruits, which causes the humidity of the refrigerating chamber to be high, and high humidity air enters the lower freezing evaporator through the return air duct 11, so that frost is formed on the freezing evaporator, when the frost formation of the freezing evaporator reaches a certain degree, automatic defrosting treatment is performed, the refrigerator 20 does not refrigerate during defrosting, and the temperature of the refrigerating chamber 20 rises; the greater the frosting amount of the freezing evaporator, the more frequent the defrosting and the longer the defrosting time, the worse the refrigerating effect of the refrigerator 20. While the frosting quantity of the freezing evaporator mainly comes from the refrigerating chamber 21. An air return pipeline 11 is arranged between an air outlet 211 of the refrigerating chamber 21 and an air inlet 221 of the freezing chamber 22, a precooling evaporator 12 is arranged on the outer wall of the air return pipeline 11, the precooling evaporator 12 refrigerates high-humidity air flowing out of the refrigerating chamber 21 to enable water in the high-humidity air to be condensed into frost, the temperature is reduced, the air with low-humidity temperature flows into the freezing chamber 22, and the freezing evaporator cannot be frosted in a large amount due to small temperature difference of the freezing chamber 22. Wherein the precooling evaporator 12 is arranged at the upper position in the return air duct 11 between the refrigerating space and the freezing space, i.e. the distance from the precooling evaporator 12 to the air outlet 211 of the refrigerating chamber 21 is smaller than the distance from the precooling evaporator 12 to the air inlet 221 of the freezing chamber 22. In this way, the high-humidity air flowing out of the refrigerating chamber 21 can be enabled to contact the precooling evaporator 12 soon after flowing out of the refrigerating chamber 21, so that the precooling is not thorough due to the fact that too much high-temperature high-humidity air contacts the precooling evaporator 12 at the same time, and the auxiliary defrosting effect is not affected.

Optionally, the refrigerator auxiliary defrosting structure 10 further includes a boss 13. The boss 13 protrudes outwards from the side wall of the return air pipeline 11, so that the inner wall of the return air pipeline 11 is recessed outwards to form a pre-cooling groove 131; a water outlet 1311 is formed in the bottom of the side wall of the pre-cooling tank 131, and the water outlet 1311 is communicated with the inside and the outside of the return air pipeline 11; the precooling evaporator 12 is attached to the outer wall of the boss 13.

As shown in fig. 1 and 5, the air return duct 11 has a rectangular outline and includes a first side wall 111 and a second side wall 112 which are disposed opposite to each other, the first side wall 111 is opposite to the inner container of the refrigerator 20, and the upper and lower parts of the first side wall 111 are connected to the refrigerating chamber 21 and the freezing chamber 22, respectively. The second side wall 112 is outwards protruded from the inside of the return air pipeline 11 to form a boss 13 on the second side wall 112, a pre-cooling groove 131 which is outwards recessed is formed in the second side wall 112, the pre-cooling groove 131 is a rectangular groove, and a water outlet 1311 is formed in the lower wall of the rectangular groove. The precooling evaporator 12 is attached to the outer wall of the boss 13, the precooling evaporator 12 reduces the temperature in the precooling groove 131, water in the air condenses into frost in the low-temperature precooling groove 131 in the process that the high-humidity air in the refrigerating chamber 21 flows through the precooling groove 131, the high-humidity air flowing out of the refrigerating chamber 21 becomes dry, the temperature is reduced, and the low-temperature low-humidity air flows back into the freezing chamber 22 through the return air pipeline 11. In the case where the pre-cooling evaporator 12 is not operated, the frosted water in the pre-cooling tank 131 accumulates in the pre-cooling tank 131 and flows out into the evaporation pan 24 in the press cabin 23 through the lower water outlet 1311.

During refrigeration of the refrigerating chamber 21, wet air in the refrigerating chamber 21 enters the air duct through the air outlet 211 of the refrigerating chamber 21, when the wet air passes through the boss 13, the temperature of the precooling evaporator 12 is low, the wet air is condensed into frost on the inner side of the boss 13, namely the inner wall of the precooling groove 131, so that the return air temperature is reduced, and the cooled and dehumidified air enters the freezing chamber 22 through the air inlet 221 of the freezing chamber 22; during the period when the refrigerating chamber 21 is not refrigerating, that is, during the shutdown period of the press, the heating wire 17 starts to generate heat, the frost layer on the boss 13 is melted, the water baffle 15 prevents the melted frost from flowing into the interior of the return air pipeline 11, and the melted frost water enters the drain pipe 14 through the water outlet 1311 and flows into the evaporation pan 24 of the press cabin 23.

Optionally, the refrigerator auxiliary defrost structure 10 further includes a drain pipe 14. The drain pipe 14 communicates with the water outlet 1311 and the refrigerator 20 to press the evaporation pan 24 in the cabin 23.

As shown in fig. 1, 2 and 5, one end of the drain pipe 14 is connected with a water outlet 1311 at the bottom of the pre-cooling tank 131, the other end of the drain pipe 14 extends downwards in the foaming layer 25 of the refrigerator 20 to the press cabin 23 of the refrigerator 20, the top wall of the press cabin 23 is provided with a drain pipe 14 opening, the lower part of the drain pipe 14 opening corresponds to the evaporation pan 24 in the press cabin 23, and the other end of the drain pipe 14 is inserted into the drain pipe 14 opening so that water in the pre-cooling tank 131 flows into the evaporation pan 24 to be discharged.

Optionally, the drain pipe 14 is in plug connection with the water outlet 1311; one end of the drain pipe 14 is inserted into the water outlet 1311 and is hermetically connected to the water outlet 1311.

As shown in fig. 1 and 4, the water outlet 1311 is formed at the lower part of the convex side wall of the boss 13 and adjacent to the bottom wall, the water outlet 1311 is a circular insertion hole, the aperture of the water outlet 1311 is matched with the outer diameter of the water drain pipe 14, and the water drain pipe 14 can be inserted into the water outlet 1311 and is tightly matched with the water outlet 1311. So as to prevent water in the pre-cooling tank 131 from flowing out into the foaming layer 25 from a gap between the drain pipe 14 and the water outlet 1311, and influence the heat preservation effect of the refrigerator 20.

In some embodiments, the sealed connection between the drain pipe 14 and the water outlet 1311 includes a sealant that fills between the drain pipe 14 and the water outlet 1311 to seal the mouth wall connecting the drain pipe 14 and the water outlet.

Optionally, the refrigerator auxiliary defrost structure 10 further includes a water deflector 15. The water baffle 15 is disposed on the lower wall of the pre-cooling tank 131 and extends upwards to cover the notch of the lower portion of the pre-cooling tank 131.

As shown in fig. 1 and 5, the lower end of the water baffle 15 is connected to the lower portion of the first side wall 111 of the return air duct 11, and extends upward. The precooling tank 131 is opened towards the side of the inner container of the refrigerator 20, the water baffle 15 shields the side opening of part of the precooling tank 131 from bottom to top, an upward opening water receiving tank is formed by the water baffle 15, the side wall and the bottom wall of the precooling tank 131, and the frosted water in the precooling tank 131 flows into the water receiving tank downwards after being frosted into water, and flows to the drain pipe 14 from the water outlet 1311.

Optionally, the evaporator is a coil evaporator; the refrigerator auxiliary defrosting structure 10 further includes: and the heating structure is attached to the coil evaporator.

As shown in fig. 2 and 3, the coil evaporator serpentine linger is disposed on the outer wall of the boss 13, and the heating structure is disposed outside the coil evaporator. The cooling capacity of the coil evaporator contacts the outer wall of the boss 13 to reduce the temperature of the boss 13. The heating structure is arranged outside the coil evaporator, and in the working process of the heating structure, the heating structure is only in contact with the coil evaporator, so that the temperature of the coil evaporator rises, and the frosting water on the side wall of the boss 13 flows downwards into the drain pipe 14.

Optionally, the heating structure comprises a heat conducting plate 16, a heating wire 17 and a connecting wire 18. Wherein, the heat conducting disc 16 is attached to the coil evaporator, and the heat conducting disc 16 is a sealing disc box; the heating wire 17 is arranged in the sealing disc box; the connecting wire 18 is connected with the heating wire 17, and extends out from one end of the heat conducting disc 16 to be connected with a control part of the refrigerator 20.

As shown in fig. 2 and 3, the heating structure includes a thermally conductive plate 16, and the thermally conductive plate 16 is attached to the coil evaporator. The heat conducting disc 16 is a sealed disc box, a heating wire 17 is arranged in the heat conducting disc 16, and the heating wire 17 heats and transfers heat to the coil evaporator through the heat conducting disc 16 so as to defrost the coil evaporator and the boss 13. The heating wire 17 is connected with the control part of the refrigerator 20 through a connecting wire 18, the connecting wire 18 extends out of the heat conducting disc 16 from the upper end of the heat conducting disc 16, and the joint of the connecting wire 18 and the heat conducting disc 16 is sealed through waiting to prevent electric leakage.

Optionally, the return air duct 11 is provided in the foam layer 25 of the refrigerator 20.

As shown in fig. 5, a foaming layer 25 is filled between the return air duct 11 and the inner container of the refrigerator 20, so that the temperature in the return air duct 11 is not transferred to the inner container of the refrigerator 20. The foaming layer 25 is filled between the return air pipeline 11 and the refrigerator 20 shell, so that the cold in the refrigerator 20 pipeline can not leak. The upper end of the return air pipeline 11 passes through the foaming layer 25 to be connected with an air outlet 211 of the refrigerating chamber 21 of the refrigerator 20, and the lower end of the return air pipeline 11 passes through the foaming layer 25 to be connected with an air inlet 221 of the freezing chamber 22 of the refrigerator 20, so that the high-humidity and high-temperature air in the refrigerating chamber 21 flows into the freezing chamber 22 from the return air pipeline 11 after being refrigerated by the precooling evaporator 12.

Optionally, the refrigerator auxiliary defrost structure 10 further comprises PE cotton (cross-linked polyethylene) 19. The PE cotton (crosslinked polyethylene) 19 is arranged at the joint of the return air pipeline 11 and the inner container of the refrigerator 20 and is used for sealing the joint of the return air pipeline 11 and the inner container of the refrigerator 20.

As shown in fig. 5, PE cotton (cross-linked polyethylene) 19 is respectively disposed at the connection parts of the return air duct 11, the refrigerating chamber 21 and the freezing chamber 22, so that high-temperature and high-humidity air in the refrigerating chamber 21 cannot leak through the connection parts of the refrigerating chamber 21 and the return air duct 11; while preventing air in the freezing chamber 22 from leaking at the junction of the freezing chamber 22 and the return air duct 11. The PE cotton (cross-linked polyethylene) 19 connects the return air duct 11 with the air outlet 211 of the refrigerating chamber 21 and the return air duct 11 with the air inlet 221 of the freezing chamber 22 by means of glue joint.

As shown in fig. 1 to 5, there is provided a refrigerator 20 according to a second aspect of the present utility model, including a refrigerating chamber 21, a freezing chamber 22, and a refrigerator auxiliary defrost structure 10 according to any one of the above embodiments. The freezing chamber 22 is arranged below the refrigerating chamber 21; the auxiliary defrosting structure 10 of the refrigerator is arranged in the foaming layer 25 between the refrigerating chamber 21 and the freezing chamber 22, wherein the upper end of the return air pipeline 11 is communicated with the refrigerating chamber 21, and the lower end is communicated with the freezing chamber 22.

The refrigerator 20 provided in the embodiments of the present disclosure includes the refrigerator auxiliary defrosting structure 10 of any one of the above embodiments, and thus has all the advantages of the refrigerator auxiliary defrosting structure 10 of any one of the above embodiments, which are not described herein.

As shown in fig. 5, the refrigerator 20 is refrigerated up and frozen down, a press cabin 23 is arranged below the freezing chamber 22, and an evaporation pan 24 is arranged at the bottom of the press cabin 23. A foaming layer 25 is arranged between the refrigerating chamber 21 and the freezing chamber 22, the refrigerator auxiliary defrosting structure 10 is arranged on the side surfaces of the refrigerating chamber 21 and the freezing chamber 22, the upper end of the return air pipeline 11 penetrates through the foaming layer 25 and is in sealing connection with the air outlet 211 of the refrigerating chamber 21, and the lower end of the return air pipeline 11 penetrates through the foaming layer 25 and is in sealing connection with the air inlet 221 of the freezing chamber 22. One end of the drain pipe 14 is connected with the water outlet 1311, and the other end passes through the foaming layer 25 to the inside of the press cabin 23 and corresponds to the evaporation pan 24 below, so that water in the pre-cooling tank 131 can flow into the evaporation pan 24 in the press cabin 23 along with the drain pipe 14.

Alternatively, the refrigerator 20 includes a defrosting step of first controlling the compressor to stop, controlling the heating wire 17 to start heating in case the compressor stop time satisfies a preset time, and controlling the heating wire 17 to stop heating in case it is detected that the temperature in the pre-cooling tank 131 satisfies the defrosting stop temperature.

The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may include structural and other modifications. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others.

Moreover, the terminology used in the present application is for the purpose of describing embodiments only and is not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a," "an," and "the" (the) are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this disclosure is meant to encompass any and all possible combinations of one or more of the associated listed.

Furthermore, when used in the present disclosure, the terms "comprises," "comprising," and/or variations thereof, mean that the recited features, integers, steps, operations, elements, and/or components are present, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising one …" does not exclude the presence of other like elements in a process, method or apparatus that includes the element.

In this context, each embodiment may be described with emphasis on the differences from the other embodiments, and the same similar parts between the various embodiments may be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method sections disclosed in the embodiments, the description of the method sections may be referred to for relevance.

The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. An auxiliary defrosting structure of a refrigerator, comprising:

The air return pipeline is arranged outside the refrigerator liner, one end of the air return pipeline is connected with an air outlet of the refrigerator refrigerating chamber, and the other end of the air return pipeline is connected with an air inlet of the refrigerator freezing chamber;

The precooling evaporator is attached to the outer wall of the return air pipeline.

2. The auxiliary defrosting structure of a refrigerator as claimed in claim 1, further comprising:

The boss protrudes outwards from the side wall of the return air pipeline, so that the inner wall of the return air pipeline is recessed outwards to form a precooling groove;

A water outlet is arranged at the bottom of the side wall of the precooling tank and is communicated with the inside and the outside of the return air pipeline;

the precooling evaporator is attached to the outer wall of the boss.

3. The auxiliary defrosting structure of a refrigerator as claimed in claim 2, further comprising:

and the drain pipe is communicated with the water outlet and the evaporation pan in the press cabin of the refrigerator.

4. The auxiliary defrosting structure for a refrigerator according to claim 3, wherein,

The drain pipe is connected with the water outlet in a plugging manner;

one end of the drain pipe is inserted into the water outlet and is connected with the water outlet in a sealing way.

5. The auxiliary defrosting structure of a refrigerator as claimed in claim 2, further comprising:

The water baffle is arranged on the lower wall of the pre-cooling tank and extends upwards to shield the notch at the lower part of the pre-cooling tank.

6. The refrigerator auxiliary defrost structure according to any one of claims 1 to 4, further comprising:

and the heating structure is attached to the precooling evaporator.

7. The auxiliary defrosting structure of a refrigerator as claimed in claim 6, wherein the heating structure comprises:

the heat conducting disc is stuck to the precooling evaporator and is a sealing disc box;

the heating wire is arranged in the sealing disc box;

the connecting wire is connected with the heating wire and extends out from one end of the heat conducting disc to be connected with the refrigerator control part.

8. The refrigerator auxiliary defrost structure according to any one of claims 1 to 4, wherein,

The return air pipeline is arranged in the refrigerator foaming layer.

9. The refrigerator auxiliary defrost structure according to any one of claims 1 to 4, further comprising:

And the PE cotton is arranged at the joint of the return air pipeline and the refrigerator liner and used for sealing the joint of the return air pipeline and the refrigerator liner.

10. A refrigerator, comprising:

A refrigerating chamber;

The freezing chamber is arranged below the refrigerating chamber;

the auxiliary defrosting structure of a refrigerator as claimed in any one of claims 1 to 9, provided in the foaming layer between the refrigerating chamber and the freezing chamber, wherein the return air duct has an upper end connected to the refrigerating chamber and a lower end connected to the freezing chamber.