CN218821883U - Copper-aluminum connecting device, evaporator and refrigeration equipment - Google Patents

Abstract

The application relates to the technical field of refrigeration equipment, and discloses a copper-aluminum connecting device and an evaporator. The copper aluminum pipe connecting device comprises: a copper tube; the aluminum pipe is fixedly connected with and contacts with the copper pipe; and the magnesium rod is arranged on the outer sides of the copper pipe and the aluminum pipe and is in contact with the copper pipe and the aluminum pipe. The copper pipe and the aluminum pipe are fixedly connected and contacted, so that the connection strength of the copper pipe and the aluminum pipe can be ensured. The magnesium rod is arranged outside the copper pipe and the aluminum pipe, the magnesium rod is used as an anode, the copper and the aluminum are used as cathodes, water in the air is used as a dielectric medium, and an original battery structure is integrally formed. Thus greatly prolonging the service life of the copper-aluminum pipe.

Description

Copper-aluminum connecting device, evaporator and refrigeration equipment

Technical Field

The application relates to the technical field of refrigeration equipment, for example to a copper-aluminum connecting device, an evaporator and refrigeration equipment.

Background

The light tubes of the existing finned tube evaporators of refrigerators and freezers are usually made of aluminum tubes, and the inlets and outlets of the evaporators are conveniently connected with refrigeration components such as capillary tubes, air return tube sets and the like, and are usually connected with a section of copper tube respectively. Because the copper pipe and the aluminum pipe are difficult to be directly welded, the copper pipe and the aluminum pipe are connected by a common heat-shrinkable sleeve (PE) at present, and the aluminum pipe is in contact with the copper pipe, so that electrochemical corrosion occurs, and the use of the evaporator is not facilitated.

It is noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the application and therefore may include information that does not form the prior art that is already known to a person of ordinary skill in the art.

SUMMERY OF THE 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 to be a prelude to the more detailed description that is presented later.

The embodiment of the disclosure provides a copper-aluminum connecting device, an evaporator and refrigeration equipment, which are used for avoiding electrochemical corrosion of a copper pipe and an aluminum pipe.

The embodiment of the present disclosure provides a copper-aluminum pipe connecting device, which includes: a copper pipe; the aluminum pipe is fixedly connected with and contacted with the copper pipe; and the magnesium rod is arranged on the outer sides of the copper pipe and the aluminum pipe and is in contact with the copper pipe and the aluminum pipe.

Optionally, the magnesium rod is at least partially sleeved outside the joint of the copper pipe and the aluminum pipe.

Optionally, the magnesium rod includes a plurality of first connection segments, and the plurality of first connection segments are sequentially connected along the circumferential direction, so that the magnesium rod is sleeved outside the copper pipe and the aluminum pipe.

Optionally, the copper-aluminum pipe connecting device further includes: and the plastic pipe is at least partially sleeved outside the magnesium rod so as to realize the connection of the magnesium rod, the copper pipe and the aluminum pipe.

Optionally, the aluminum pipe is provided with a first limiting part, the plastic pipe is provided with a first limiting matching part, and when the first limiting part is matched with the first limiting matching part, the plastic pipe limits movement towards a first direction; the copper pipe is provided with a second limiting part, the plastic pipe is provided with a second limiting matching part, the second limiting part is matched with the second limiting matching part, the plastic pipe is limited to move towards a second direction, the second direction is opposite to the first direction, and the first direction and the second direction are consistent with the extending direction of the copper pipe and the extending direction of the aluminum pipe.

Optionally, the copper-aluminum pipe connecting device further includes: and the fastening sealing ring is sleeved on the outer side of the plastic pipe and is used for fixing the plastic pipe and the copper pipe or the aluminum pipe.

Optionally, sealing oil is provided between the fastening sealing ring and the plastic pipe.

Optionally, the plastic tube is a transparent tube; and/or the presence of a gas in the gas,

optionally, the plastic tubing includes a plurality of second linkage segments, and is a plurality of the second linkage segment sets gradually along circumference to make the plastic tubing cover locate the outside of magnesium stick.

The embodiment of the disclosure also provides an evaporator, which includes the copper-aluminum pipe connecting device as described in any one of the above embodiments.

The embodiment of the disclosure also provides a refrigeration device, which comprises the evaporator of the embodiment.

The copper-aluminum connecting device, the evaporator and the refrigeration equipment provided by the embodiment of the disclosure can realize the following technical effects:

the copper pipe and the aluminum pipe are fixedly connected and contacted, so that the connection strength of the copper pipe and the aluminum pipe can be ensured. The magnesium rod is arranged outside the copper pipe and the aluminum pipe, the magnesium rod is used as an anode, the copper and the aluminum are used as cathodes, water (or water generated in other modes) in the air is used as a dielectric medium, and an original battery structure is integrally formed. Thus greatly prolonging the service life of the copper aluminum pipe.

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 in the accompanying drawings, which correspond to the accompanying drawings and not in a limiting sense, in which elements having the same reference numeral designations represent like elements, and in which:

fig. 1 is a schematic structural diagram of a copper-aluminum connecting device according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of another copper-aluminum connection device provided in the embodiment of the present disclosure;

fig. 3 is a schematic structural view of a refrigerator provided by the embodiment of the present disclosure;

FIG. 4 is a schematic structural view of a liner and a return air cover plate according to an embodiment of the present disclosure;

fig. 5 is a schematic view of an exploded view of a return air cover according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of an inner container provided by an embodiment of the present disclosure;

FIG. 7 is a schematic diagram of an evaporator according to an embodiment of the present disclosure;

fig. 8 is a schematic cross-sectional view of an inner container and an evaporator provided in the embodiment of the present disclosure;

FIG. 9 is a schematic view of a sidewall construction provided by an embodiment of the present disclosure;

fig. 10 is a schematic structural view of another sidewall provided in the embodiments of the present disclosure.

Reference numerals:

10. a copper pipe; 20. an aluminum tube; 30. a plastic tube; 303. a first limiting part; 304. a second limiting part; 305. a second connection section; 40. a fastening ring; 401. a first fastening sealing ring; 402. a second fastening sealing ring; 50. a magnesium rod; 501. a first connection section; 1. an inner container; 11. a side wall; 111. a first side wall; 112. a second side wall; 115. a step; 116. an air supply duct; 1161. a first air supply duct; 1162. a second air supply duct; 117. an air supply outlet; 1171. a first air supply outlet; 1172. a second air supply outlet; 12. a bottom wall; 13. an interior space; 131. a storage chamber; 132. an evaporator chamber; 2. a return air cover plate; 21. a first air return opening; 22. a second air return inlet; 23. a third air return inlet; 24. a first sub-cover plate; 25. a second sub-cover plate; 26. a third sub-cover plate; 27. a side plate; 271. a top plate; 3. an evaporator; 301. a first evaporator coil; 302. a second evaporator coil; 31. a first evaporator; 32. a second evaporator; 34. a fin; 341. an evaporation tube; 37. a water outlet; 4. a capillary tube; 44. a first sub-capillary; 45. a second sub-capillary; 8. a fan; 84. a first fan; 85. a second fan; 94. a cabinet housing; 95. a door body; 96. a compressor.

Detailed Description

So that the manner in which the features and advantages of the embodiments of the present disclosure can be understood in detail, a more particular description of the embodiments of the disclosure, briefly summarized above, may be had by reference to the appended drawings, which are included to illustrate, but are not intended to limit 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 be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.

The terms "first," "second," and the like in the description and claims of the embodiments of the disclosure and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

In the embodiments of the present disclosure, terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the disclosed embodiments and their examples and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation. Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the embodiments of the present disclosure may be understood as specific cases by those of ordinary skill in the art.

In addition, the terms "disposed," "connected," and "secured" are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can 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. Specific meanings of the above terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art according to specific situations.

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

The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

Referring to fig. 1 to 2, the present disclosure provides a copper-aluminum pipe connecting device, which includes a copper pipe 10 and an aluminum pipe 20, wherein the aluminum pipe 20 is fixedly connected to and contacts the copper pipe 10.

In this embodiment, the aluminum pipe 20 and the copper pipe 10 are fixedly connected and contacted, so that the connection stability of the aluminum pipe 20 and the copper pipe 10 can be increased, and the phenomenon that the aluminum pipe 20 and the copper pipe 10 fall off to influence the operation of the evaporator is avoided.

Specifically, the copper pipe 10 and the aluminum pipe 20 are connected by welding.

In this embodiment, the welding mode has high connection strength, and the copper pipe 10 and the aluminum pipe 20 can be ensured to be in contact with each other, so that the copper pipe 10 and the aluminum pipe 20 can conduct electricity, and electrons can be moved away conveniently.

Optionally, the copper aluminum pipe connecting device further comprises a magnesium rod 50, and the magnesium rod 50 is disposed outside the copper pipe 10 and the aluminum pipe 20 and contacts both the copper pipe 10 and the aluminum pipe 20.

In this embodiment, the magnesium rod 50 is used as an anode, the copper and aluminum are used as a cathode, water (or water generated by other methods) in the air is used as a dielectric medium, and a galvanic cell structure is integrally formed, and the copper pipe 10 and the aluminum pipe 20 are protected from electrochemical corrosion by sacrificing the anode magnesium rod 50, so that the connection strength of the copper pipe 10 and the aluminum pipe 20 can be ensured by the copper pipe 10, the aluminum pipe 20 and the magnesium rod 50, and the electrochemical corrosion of the copper pipe 10 and the aluminum pipe 20 can be avoided.

Alternatively, as shown in FIG. 2, the magnesium rod 50 is at least partially sleeved outside the joint of the copper tube 10 and the aluminum tube 20.

In this embodiment, the magnesium rod 50 is at least partially sleeved outside the joint of the copper pipe 10 and the aluminum pipe 20, that is, the magnesium rod 50 extends along the circumferential direction of the joint of the copper pipe 10 and the aluminum pipe 20, so that the magnesium rod 50 is matched with both the copper pipe 10 and the aluminum pipe 20, and the electrochemical corrosion of the copper pipe 10 and the aluminum pipe 20 can be prevented in the circumferential direction.

Optionally, the magnesium rod 50 includes a plurality of first connecting sections 501, and the plurality of first connecting sections 501 are sequentially connected along the circumferential direction, so that the magnesium rod 50 is sleeved outside the copper pipe 10 and the aluminum pipe 20.

In this embodiment, the magnesium rod 50 is divided into a plurality of first connecting sections 501, which facilitates the removal and installation of the magnesium rod 50. Since the magnesium rod 50 is a consumable, after the magnesium rod 50 is consumed, the plurality of first connecting sections 501 can be separated, thereby realizing detachment of the magnesium rod 50.

As shown in fig. 2, the first connecting section 501 includes a first sub-connecting section and a second sub-connecting section, the cross sections of the first sub-connecting section and the second sub-connecting section are both semicircular, and the first sub-connecting section and the second sub-connecting section can be spliced to form the magnesium rod 50 with a circular cross section, so that the first sub-connecting section and the second sub-connecting section can be fitted and sleeved on the outer sides of the copper pipe 10 and the aluminum pipe 20.

Optionally, sealing oil is provided between the first connection sections 501, so that air, water or other impurities can be prevented from contacting the magnesium rod 50, and consumption of the magnesium rod 50 can be reduced.

Optionally, the copper-aluminum connecting device further comprises a plastic tube 30, and the plastic tube 30 is at least partially sleeved outside the magnesium rod 50 to connect the magnesium rod 50 with the copper tube 10 and the aluminum tube 20.

In this embodiment, the plastic tube 30 can fixedly connect the magnesium rod 50 with the copper tube 10 and the aluminum tube 20, so as to prevent the magnesium rod 50 from deviating or falling off. In addition, the plastic pipe 30 has higher strength and durability, which enables better connection of the magnesium rod 50, the copper pipe 10 and the aluminum pipe 20. And the plastic pipe 30 has weak heat conductivity, so that the problem of serious frosting at the inlet and the outlet of the evaporator can be avoided.

Optionally, the plastic pipe 30 includes a plurality of second connection segments 305, and the plurality of second connection segments 305 are sequentially arranged along the circumferential direction, so that the plastic pipe 30 is sleeved outside the magnesium rod 50.

In this embodiment, the plurality of second connection sections 305 make the connection and the detachment of the plastic tube 30 more convenient, and when the magnesium rod 50 needs to be replaced, the plurality of second connection sections 305 are detached.

Optionally, the joints of the second connecting segments 305 are also provided with sealing oil, so that the sealing performance of the joints can be increased, and outside air and water are prevented from entering the plastic pipe 30.

Optionally, the aluminum pipe 20 is provided with a first limiting part 303, the plastic pipe 30 is provided with a first limiting matching part, and when the first limiting part 303 is matched with the first limiting matching part, the plastic pipe 30 is limited to move towards the first direction.

The copper pipe 10 is provided with a second limiting part 304, the plastic pipe 30 is provided with a second limiting matching part, when the second limiting part 304 is matched with the second limiting matching part, the plastic pipe 30 is limited to move towards a second direction, the second direction is opposite to the first direction, and the first direction and the second direction are consistent with the extending directions of the copper pipe 10 and the aluminum pipe 20.

In this embodiment, the first limiting part 303 and the second limiting part 304 are arranged to facilitate the positioning and limiting of the plastic tube 30, so as to prevent the plastic tube 30 from moving and further influence the fixation of the magnesium rod 50. The movement of the plastic pipe 30 in the first direction or the second direction is restricted by the first and second restricting portions 303 and 304, which can restrict the movement of the plastic pipe 30 along the copper pipe 10 or the aluminum pipe 20.

Optionally, as shown in fig. 1, the first limiting portion 303 includes a first protrusion, the first limiting portion 303 includes one end of the plastic pipe 30, the first protrusion protrudes from the outer wall surface of the copper pipe 10, and when the plastic pipe 30 is sleeved outside the copper pipe 10, one end of the plastic pipe 30 can abut against the first protrusion, so that the plastic pipe 30 can be prevented from moving toward the first direction.

Alternatively, the first protrusion extends in the circumferential direction of the copper pipe 10, so that the plastic pipe 30 can be restricted from moving in the circumferential direction.

Optionally, the second limiting portion 304 includes a second protrusion, the second limiting portion 304 includes the other end of the plastic tube 30, the second protrusion protrudes from the outer wall surface of the aluminum tube 20, and when the plastic tube 30 is sleeved on the outer side of the aluminum tube 20, the other end of the plastic tube 30 can abut against the second protrusion, so that the plastic tube 30 can be prevented from moving towards the second direction.

Alternatively, the second protrusion extends along the circumference of the aluminum pipe 20, so that the plastic pipe 30 can be restricted from moving from the circumference.

Optionally, the copper-aluminum pipe connecting device further includes a fastening sealing ring 40, and the fastening sealing ring 40 is sleeved outside the plastic pipe 30 and used for fixing the plastic pipe 30 and the copper pipe 10 or the aluminum pipe 20.

Alternatively, the number of the fastening sealing rings 40 is one or more, and when the number of the fastening sealing rings 40 is plural, the plural fastening sealing rings are sequentially provided at intervals outside the plastic pipe 30.

Optionally, the plurality of fastening sealing rings 40 includes a first fastening sealing ring 401, and the first fastening sealing ring 401 is sleeved outside the plastic pipe 30, corresponding to the copper pipe 10, for fastening the plastic pipe 30 and the copper pipe 10.

In this embodiment, the first fastening sealing ring 401 is sleeved outside the plastic pipe 30, so as to further fasten the copper pipe 10 and the plastic pipe 30, and improve the connection strength between the plastic pipe 30 and the copper pipe 10.

Optionally, the plurality of fastening sealing rings 40 further includes a second fastening ring 40, and the second fastening ring 40 is sleeved outside the plastic tube 30, corresponding to the aluminum tube 20, for fastening the plastic tube 30 and the aluminum tube 20.

In this embodiment, the second fastening sealing ring 402 is sleeved outside the plastic pipe 30, so as to further fasten the aluminum pipe 20 and the plastic pipe 30, and improve the connection strength between the plastic pipe 30 and the aluminum pipe 20.

Optionally, sealing oil is provided between the fastening sealing ring and the plastic pipe 30, so that the sealing performance of the fastening sealing ring can be further improved, and the sealing performance of the pipeline can be ensured.

Optionally, when the copper-aluminum connecting device includes the first fastening sealing ring 401, sealing oil is provided between the first fastening sealing ring 401 and the plastic pipe 30.

In this embodiment, the sealing oil can further seal plastic tubing 30 and first fastening sealing ring 401, improves sealing performance, avoids first fastening sealing ring 401 to drop.

Optionally, when the copper-aluminum connection device includes the second fastening sealing ring 402, there is sealing oil between the second fastening sealing ring 402 and the plastic pipe 30.

In this embodiment, the sealing oil can further seal the plastic pipe 30 and the second fastening sealing ring 402, so as to improve the sealing performance and prevent the second fastening sealing ring 402 from falling off.

The sealing oil is high-temperature-resistant sealing oil, so that the sealing performance can be ensured even if the sealing oil is influenced by high temperature.

Optionally, the plastic tube 30 is a transparent tube.

In this embodiment, the plastic tube 30 is a transparent tube, so that the consumption of the magnesium rod 50 can be observed from the outside of the plastic tube 30, which is convenient for replacing the magnesium rod 50 in time, and avoids electrochemical corrosion of the copper tube 10 and the aluminum tube 20 after the magnesium rod 50 is consumed.

The copper aluminum pipe connecting device provided by the embodiment of the disclosure judges the consumption condition of the magnesium rod 50 through the transparent plastic pipe 30, and the magnesium rod 50 is replaced regularly. Compared with other anti-corrosion means, the copper-aluminum pipe has the advantages of simple and reliable structure, no need of welding, no need of cold or heat treatment, convenient replacement and disassembly, no electrochemical corrosion between the copper pipes and long service life.

Optionally, the working temperature of the plastic pipe 30 is-50 ℃ to 80 ℃ (the brittle temperature is less than or equal to-50 ℃, and the heat distortion temperature is greater than or equal to 80 ℃); the shrinkage temperature of the plastic tube 30 is 79-150 ℃; shrinkage ratio of plastic tube 30 1.5:1. this ensures that the copper pipe 10 and the aluminum pipe 20 are not easily deformed during normal operation, and ensures the connection strength. And the plastic pipe 30 is deformed at a high temperature to facilitate the installation of the copper pipe 10 and the aluminum pipe 20.

Optionally, the first fastening seal ring 401 and the second fastening seal ring 402 are made of metal material, so that the two fastening seal rings have high strength and good ductility.

The embodiment of the disclosure also provides an evaporator, which comprises the copper-aluminum pipe connecting device in any one of the above embodiments.

The evaporator provided by the embodiment of the present disclosure includes the copper aluminum pipe connecting device in any one of the above embodiments, and therefore has the beneficial effects of the copper aluminum pipe connecting device in any one of the above embodiments, which are not described herein again.

The inlet end of the evaporator and/or the outlet end of the evaporator are/is provided with the copper-aluminum pipe connecting device, so that the evaporator can be conveniently connected with a capillary tube and a return air pipe, and the copper tube 10 and the aluminum tube 20 can be prevented from being subjected to electrochemical corrosion.

The embodiment of the disclosure also provides an evaporator 3, and the evaporator 3 comprises the copper-aluminum pipe connecting device in any one of the above embodiments.

The evaporator 3 provided in the embodiment of the present disclosure includes the copper-aluminum pipe connecting device in any one of the above embodiments, and therefore has the beneficial effects of the copper-aluminum pipe connecting device in any one of the above embodiments, which are not described herein again.

The inlet end of the evaporator 3 and/or the outlet end of the evaporator 3 are/is provided with the copper-aluminum pipe connecting device, so that the evaporator 3 can be conveniently connected with the capillary tube 4 and the air return pipe, and the copper pipe 10 and the aluminum pipe 20 can be prevented from electrochemical corrosion.

Alternatively, the evaporator 3 includes a plurality of fins 34 and an evaporation tube 341, the plurality of fins 34 are arranged side by side, and the evaporation tube 341 sequentially passes through the plurality of fins 34 in a reciprocating manner.

As shown in fig. 3 to 10, an embodiment of the present disclosure further provides a refrigeration apparatus including the evaporator 3 of any one of the above embodiments.

The embodiment of the present disclosure further provides a refrigeration apparatus, which includes the evaporator 3 according to any one of the embodiments, and therefore has the beneficial effects of the evaporator 3 according to any one of the embodiments, which are not described herein again.

Alternatively, the refrigeration device may be an apparatus requiring the evaporator 3, including but not limited to a refrigerator, a freezer, an air conditioner, and the like, and the present application is not limited thereto.

The refrigerator also comprises a condenser, a compressor 96, a capillary tube 4 and a gas return pipe, wherein the capillary tube 4 is communicated between the outlet of the condenser and the inlet of the evaporator 3, and the gas return pipe is connected between the evaporator 3 and the outlet and the inlet of the compressor 96.

Alternatively, as shown in fig. 7, the capillary tube 4 is partially attached to the evaporation tube 341 and extends over the surface of the evaporation tube 341.

In this embodiment, capillary 4 and evaporating pipe 341 are laminated mutually, that is to say, capillary 4 and the equipment of evaporimeter 3 are in the same place, can reduce the outside space of evaporimeter 3 that capillary 4 occupy like this, need not to reserve great space and place capillary 4, especially to current freezer, in order to guarantee capillary 4's effective length, and realize the heat transfer of capillary 4 and muffler, capillary 4 and backheat pipe form the return air nest of tubes, the return air nest of tubes is most to be set up between case shell 94 and inner bag 1, and the little part of cold volume and the capillary 4 heat transfer that the refrigerant carried in the return air pipe, most cold volume dissipation is outside, cause the cold volume loss. Through the setting of capillary 4 and evaporating pipe 341 of this embodiment, can set up most capillary 4 laminating evaporating pipe 341, can enough guarantee capillary 4's effective length, capillary 4 can also with the heat transfer of evaporating pipe 341, reduced the space between shell and the inner bag 1 that capillary 4 occupy, also need not to set up the return air pipe group like this, can reduce the cold volume loss of return air pipe group.

Alternatively, the capillary 4 may be extended in the same direction as the evaporation tube 341. Here, the evaporating pipe 341 extends in an S-shaped bent manner, and the capillary tube 4 also extends in an S-shaped bent manner, so that the contact area between the capillary tube 4 and the evaporating pipe 341 is increased, the heat exchange between the capillary tube 4 and the air return pipe is improved, the capillary tube 4 can take away the cooling capacity of the evaporating pipe 341, and the frosting rate of the evaporator 3 and the fan 8 is reduced.

Alternatively, the evaporation tubes 341 are arranged in a plurality of rows along the thickness direction of the evaporator 3, the plurality of rows of evaporation tubes 341 includes a first evaporation coil 301 and a second evaporation coil 302, and the second evaporation coil 302 is located below the first evaporation coil 301. The inlet of the first evaporation coil 301 is communicated with the outlet of the second evaporation coil 302, the inlet of the second evaporation coil 302 is communicated with the outlet of the capillary tube 4, and the outlet of the first evaporation coil 301 is communicated with the air return pipe. Here, the refrigerant in the evaporator 3 flows in and out from the bottom, and the liquid refrigerant can be prevented from flowing into the compressor 96.

In this embodiment, the evaporation tubes 341 are arranged in multiple rows, so that the refrigerating capacity of the evaporator 3 can be increased, and the heat exchange area can be increased.

Optionally, the capillary 4 comprises a first sub-capillary 44 and a second sub-capillary 45. The first sub-capillary 44 is attached to the side of the first evaporator coil 301 facing the second evaporator coil 302; the second sub-capillary 45 is connected to the first sub-capillary 44 and attached to the side of the second evaporating coil 302 facing the first evaporating coil 301. Here, the capillary tube 4 is located below the first evaporating coil 301 and above the second evaporating coil 302, so that the installation length of the capillary tube 4 can be ensured, and the heat exchange between the capillary tube 4 and the evaporating coil can be improved.

Alternatively, the outlet of the first sub-capillary 44 communicates with the inlet of the second sub-capillary 45, and the outlet of the second sub-capillary 45 communicates with the inlet of the evaporation tube 341.

In this embodiment, the refrigerant in the capillary tube 4 flows from the first sub-capillary tube 44 to the second sub-capillary tube 45, and the first sub-capillary tube 44 is attached to the coil of the first evaporator 31, so that the height of the first sub-capillary tube 44 is greater than the length of the second sub-capillary tube 45, which facilitates the refrigerant in the capillary tube 4 to flow into the evaporation tube 341.

Alternatively, the sum of the length of the first sub-capillary 44 and the length of the second sub-capillary 45 is greater than or equal to a preset length, which is an effective length of the capillary 4 required for the evaporator 3 to operate normally.

In this embodiment, the sum of the lengths of the first sub-capillary 44 and the second sub-capillary 45 is greater than or equal to the predetermined length, so that the normal operation of the evaporator 3 can be ensured.

Optionally, the capillary tube 4 is fixedly connected with the outlet end of the evaporation tube 341; and/or, the capillary tube 4 is fixedly connected with the inlet end of the evaporation tube 341. Thus, the capillary 4 can be fixed, so that the capillary 4 is attached and fixed to the evaporation tube 341, and the movement of the capillary 4 is avoided. Specifically, the first sub-capillary 44 is fixedly connected to the outlet end of the evaporation tube 341, and the second sub-capillary 45 is fixedly connected to the inlet end of the evaporation tube 341. Therefore, the capillary tube 4 can exchange heat with the outlet end of the evaporation tube 341, and the fan 8 is prevented from frosting. Optionally, the outlet ends of the capillary tube 4 and the evaporation tube 341 are welded, and the inlet ends of the capillary tube 4 and the evaporation tube 341 are also welded.

Optionally, the length of the first evaporator coil 301 is greater than the length of the first sub-capillary tube 44, and/or the length of the second evaporator coil 302 is greater than the length of the second sub-capillary tube 45, so as to ensure that the evaporator coil has enough length to exchange heat with the capillary tube 4. In practical application, the length of the evaporation coil can be increased, and the number of rows of the evaporation coil in the thickness direction is reduced, so that the utilization rate of the internal space 13 can be reduced, and the volume rate of the internal space 13 is improved.

As shown in fig. 3 to 6 and 8 to 10, an embodiment of the present disclosure provides a refrigerator, in particular, an air-cooled freezer, and more particularly, an air-cooled horizontal freezer. The freezer includes box and door body 95, and door body 95 activity is located the top of box. The box includes case shell 94, inner bag 1 and foaming layer, and inner bag 1 is located inside case shell 94, and the foaming layer is located between case shell 94 and inner bag 1. Optionally, the foamed layer is a thermal insulation material. The refrigerator also comprises a condenser, a compressor 96, a capillary tube 4 and a gas return pipe, wherein the capillary tube 4 is communicated between the outlet of the condenser and the inlet of the evaporator 3, and the gas return pipe is connected between the evaporator 3 and the outlet and the inlet of the compressor 96.

The inner container 1 includes a bottom wall 12 and a side wall 11, and the side wall 11 includes a front side wall, a rear side wall, a left side wall and a right side wall. The front side wall and the rear side wall are arranged oppositely and respectively located at the front end and the rear end of the bottom wall 12, and the front side wall and the rear side wall both extend upwards. The left and right side walls are disposed opposite to each other, and the left and right side walls are located at left and right ends of the bottom wall 12, respectively, and extend upward. The bottom wall 12, the front side wall, the rear side wall, the left side wall and the right side wall together enclose an interior space 13. The inner space 13 has an opening facing upward, and a door 95 is movably provided above the opening.

For convenience of description, the front-back direction is defined as a width direction, and the left-right direction is defined as a length direction.

The embodiment of the present disclosure provides a refrigerator, the inner container 1 includes a first side wall 111 and a second side wall 112, the first side wall 111 and the second side wall 112 are arranged along a width direction of the inner container 1, and both the first side wall 111 and the second side wall 112 define an air supply duct 116 having an air supply opening 117. Here, the first sidewall 111 and the second sidewall 112 are disposed along the width direction of the inner container 1, that is, the first sidewall 111 may be a rear sidewall or a front sidewall, and correspondingly, the second sidewall 112 may be a front sidewall or a rear sidewall. It can be understood that: each of the front and rear side walls defines a supply air duct 116 having a supply air outlet 117. Thus, air can be discharged from the inner space 13, and air cooling can be performed.

The freezer also comprises a return air cover plate 2, the return air cover plate 2 is positioned in the inner space 13 and divides the inner space 13 into a storage cavity 131 and an evaporator cavity 132, an outlet of the evaporator cavity 132 is communicated with an inlet of the air supply duct 116, the return air cover plate 2 is provided with a return air inlet, and air flow in the storage cavity 131 can flow into the evaporator cavity 132 through the return air inlet. Here, the storage chamber 131 is used to store items to be frozen, such as meat, seafood, or tea leaves. The evaporator cavity 132 is used for generating a cooling airflow, the cooling airflow can flow from the evaporator cavity 132 to the air supply duct 116, flow into the storage cavity 131 from the air supply opening 117, exchange heat with objects in the storage cavity 131, then flow back into the evaporator cavity 132 to be cooled again, and flow back to the air supply duct 116 to circulate. Thus, the air path circulation of the refrigerator is realized, and the air cooling refrigeration of the refrigerator is realized.

It should be noted that the return air cover 2 may have various shapes such as an L-shape, an inclined shape, etc. The evaporator chamber 132 can also be a variety of shapes and located in different locations within the interior space 13. For example, the evaporator cavity 132 can be located at the left, middle or right end of the interior space 13, and in practical applications, the evaporator cavity 132 and the storage cavity 131 can be arranged according to the structure of the refrigerator interior space 13.

The cooler also includes an evaporator 3 and a fan 8, the evaporator 3 being located within the evaporator cavity 132. Optionally, the fan 8 and the air supply duct 116 are located on the same side wall 11, and the fan 8 is communicated with the air supply duct 116. The fan 8 can drive the airflow to flow through the evaporator cavity 132, the air supply duct 116 and the storage cavity 131, and then the airflow flows back to the evaporator cavity 132 through the air return opening, so that a circulation air path is formed. Here, the evaporator 3 is used to exchange heat with the airflow within the evaporator chamber 132 to form a refrigerant airflow. The fan 8 powers the airflow flow. Fan 8 all is located same lateral wall 11 with air supply duct 116, and the air current flow direction air supply duct 116 that can fan 8 flow out need not to pass through the right angle turning like this, can reduce the loss of air current, improves the refrigeration effect of freezer, reduces the energy consumption.

Optionally, fans 8 are disposed in the first side wall 111 and the second side wall 112, the number of the fans 8 is multiple, the multiple fans 8 include a first fan 84 and a second fan 85, the first fan 84 is located in the first side wall 111, the first fan 84 is communicated with the first air supply duct 1161, and the first side wall 111 defines the first air supply duct 1161. The second fan 85 is located in the second side wall 112, the second fan 85 is communicated with the second air supply duct 1162, the second side wall 112 defines a second air supply duct 1162, and the air supply duct 116 includes a first air supply duct 1161 and a second air supply duct 1162. In fig. 4, thick arrows indicate the air outlet direction of the air outlet, and thin arrows indicate the flow direction of the air flow in the internal space.

In this embodiment, the air current of freezer flows out from first lateral wall 111 and second lateral wall 112 and returns from the return air inlet return air of return air apron 2, can shorten the flow distance of outflow air current, reduces the air current and flows the in-process and receive the blockking of centre sill, improves the forced air cooling refrigeration effect of freezer. Especially, the refrigerating effect of the large horizontal refrigerator can be obviously improved, and the frosting effect of the inner container 1 can be reduced due to the adoption of air cooling, so that the frostless effect of the refrigerator is realized, and the defrosting effect is solved.

Alternatively, when the number of the air supply ducts 116 is one or more, and the number of the air supply ducts 116 is plural, the plural air supply ducts 116 are sequentially arranged at intervals in the height direction of the side wall 11.

Optionally, when there are one or more first air supply ducts 1161 and there are multiple first air supply ducts 1161, multiple first air supply ducts 1161 are sequentially arranged at intervals in the height direction of the first side wall 111; and/or, when the number of the second air supply ducts 1162 is one or more, and the number of the second air supply ducts 1162 is more, the plurality of second air supply ducts 1162 are sequentially arranged at intervals along the height direction of the second side wall 112. In this embodiment, the arrangement of the first air supply ducts 1161 and/or the second air supply ducts 1162 enables the air output of the refrigerator to be blown to all corners of the inner container 1, so as to improve the refrigeration effect of the refrigerator.

Optionally, the air duct 116 of one sidewall 11 may be disposed at least one of the upper portion, the middle portion, and the lower portion of the sidewall 11, so as to realize air outlet to different positions of the liner 1.

As shown in fig. 9 and 10, two air supply ducts 116 are provided for one side wall 11, and one air supply duct 116 is provided for each of the upper and lower portions of the side wall 11, where the upper air supply duct 116 is used for cooling the middle upper portion of the freezer and the lower air supply duct 116 is used for cooling the middle lower portion of the freezer, so that the freezer can be cooled quickly.

In an example, two air supply ducts 116 are provided for one side wall 11, and one air supply duct 116 is provided at each of the upper portion and the middle portion of the side wall 11, so that the middle upper portion of the inner container 1 can be cooled.

For example, as shown in fig. 9 and 10, two air supply ducts 116 are respectively disposed on the first side wall 111 and the second side wall 112, specifically, the number of the first air supply ducts 1161 is two, one first air supply duct 1161 is located at the upper portion of the first side wall 111 and is used for realizing air outlet at the middle upper portion of the inner container 1, and one first air supply duct 1161 is located at the lower portion of the first side wall 111 and is used for realizing air outlet at the middle lower portion of the inner container 1. Similarly, the number of the second air supply ducts 1162 is two, one second air supply duct 1162 is located at the upper portion of the second side wall 112 and is used for realizing air outlet at the upper middle portion of the inner container 1, and the other second air supply duct 1162 is located at the lower portion of the second side wall 112 and is used for realizing air outlet at the lower middle portion of the inner container 1.

In some alternative embodiments, the number of the first air supply ducts 1161 is the same as that of the second air supply ducts 1162, and there is a one-to-one correspondence. Therefore, air is uniformly discharged from the front side and the rear side in the refrigerator, and the air discharging uniformity of the refrigerator is improved. In other alternative embodiments, the number of the first air supply ducts 1161 is different from the number of the second air supply ducts 1162, so that the air output positions and the air output amount of two opposite sides of the refrigerator may be different, and the air output positions of the two sides may be complementary to each other, so as to increase the air output area of the refrigerator. Or different numbers of air supply ducts 116 can be arranged according to the requirements of different side walls 11, so that the use flexibility of the refrigerator is improved.

Optionally, the first side wall 111 is provided with two first air supply ducts 1161, the second side wall 112 is provided with one second air supply duct 1162, the two first air supply ducts 1161 are respectively located at the middle portion and the upper portion of the first side wall 111, and the second air supply duct 1162 is located at the upper portion of the second side wall 112. The first sidewall 111 is a rear sidewall, and the second sidewall 112 is a front sidewall. Therefore, the rear side wall is provided with more air supply ducts 116 to realize refrigeration, and the front side wall is provided with smaller air supply ducts 116 to reduce heat loss of the air supply ducts 116.

It should be noted that: the number and the positions of the first air supply duct 1161 and the second air supply duct 1162 may be set according to the use requirement, which is not specifically limited herein.

Optionally, the first air supply duct 1161 extends along a length direction of the inner tub 1, and/or the second air supply duct 1162 extends along a length direction of the inner tub 1. Because the length of freezer inner bag 1 is longer, consequently, air supply duct 116 extends along the length direction of inner bag 1, can increase air supply area and refrigerating output, improves the refrigeration effect and the refrigeration homogeneity of freezer.

Optionally, a first air supply duct 1161 has a plurality of first air supply openings 1171, and the plurality of first air supply openings 1171 are sequentially arranged at intervals along the extending direction of the first air supply duct 1161. The plurality of first air supply outlets 1171 can realize air supply of the first air supply duct 1161 along the length direction, so that the uniformity of air supply is improved. Optionally, a second air supply duct 1162 has a plurality of second air supply openings 1172, and the plurality of second air supply openings 1172 are sequentially arranged at intervals along the extending direction of the second air supply duct 1162. The plurality of second air supply outlets 1172 can realize air outlet of the second air supply duct 1162 along the length direction, so that air outlet uniformity is improved.

Optionally, the first fan 84 is in communication with one or more first supply air ducts 1161. The second fan 85 is in communication with one or more second supply air ducts 1162. Here, one first fan 84 can simultaneously drive the flow of air flow in the plurality of first air supply paths 1161, and similarly, one second fan 85 can simultaneously drive the flow of air flow in the plurality of second air supply paths 1162. Finally, the air path circulation of the refrigerator can be realized.

Optionally, the fan 8 is located at one end of the side wall 11. For example, the first fan 84 is disposed at one end of the first side wall 111, and the second fan 85 is disposed at one end of the second side wall 112. Thus, the airflow from the fan 8 flows in one direction, and the split flow of the fan 8 is reduced.

Optionally, the evaporator 3 is located in the evaporator cavity 132, the number of the evaporators 3 may be one or more, and when the evaporators 3 are multiple, the heat exchange effect of the air flows in the evaporators 3 and the evaporator cavity 132 can be increased, so as to improve the refrigeration effect of the refrigerator. It should be noted that: the number of evaporators 3 is not limited to the air outlet type used in the present application, and for other refrigerators in which the evaporators 3 are required, a plurality of evaporators 3 may be provided in the evaporator chamber 132. For example, the air supply opening 117 is provided in one of the front side wall and the rear side wall, the return air cover 2 is provided with an air path type return air opening, and a plurality of evaporators 3 may be provided in the evaporator chamber 132. For example, the return air cover 2 may be provided with the supply port 117, the evaporator chamber 132 may have a bottom return air passage form, and the evaporator chamber 132 may be provided with a plurality of evaporators 3. This is not described in detail in the present application.

Optionally, the number of the evaporators 3 is the same as that of the fans 8, and the evaporators 3 correspond to one another, the plurality of evaporators 3 include a first evaporator 31 and a second evaporator 32, the first evaporator 31 is located in the evaporator cavity 132, the first evaporator 31 corresponds to the first fan 84 and is communicated with the first air supply duct 1161, and the first fan 84 drives the airflow flowing in from the air return opening to flow into the first air supply duct 1161 after flowing through the first evaporator 31. The second evaporator 32 is located in the evaporator cavity 132, the second evaporator 32 corresponds to the second fan 85 and is communicated with the second air supply duct 1162, and the second fan 85 drives the airflow flowing in from the air return opening to flow into the second air supply duct 1162 after flowing through the second evaporator 32. Here, the first evaporator 31 cooperates with the first fan 84 to drive the airflow in the first blowing air path 1161. The second evaporator 32 cooperates with the second fan 85 to drive airflow in the second supply air path 1162. In this way, the temperatures of the airflows in the first and second air supply ducts 1161 and 1162 are both adjustable, and the cooling capacities of the first and second air supply ducts 1161 and 1162 can be ensured.

It should be noted that: the number of the evaporators 3 may also be one, and the two fans 8 drive the airflow to flow through one evaporator 3 and then respectively flow to the first air supply duct 1161 and the second air supply duct 1162. Thus, the cost can be reduced, and the installation is convenient. The number of the evaporators 3 may be larger than two, and the user can reasonably arrange the number and the position relationship of the evaporators 3 according to the space of the evaporator cavity 132.

Alternatively, the first evaporator 31 and the second evaporator 32 are sequentially disposed along the width direction of the liner 1. Here, since the first and second sidewalls 111 and 112 are disposed in the width direction of the inner tub 1, the first and second fans 84 and 85 are also disposed in the width direction of the inner tub 1, and thus the first and second evaporators 31 and 32 are also disposed in the width direction of the inner tub 1. Therefore, the air flows flowing into the air return opening respectively flow to the first evaporator 31 and the second evaporator 32, and the air flows in two directions are prevented from being interfered.

It should be noted that: the first evaporator 31 and the second evaporator 32 may be arranged in other manners, and the manner of communicating the first evaporator 31 with the first air supply duct 1161 and the manner of communicating the second evaporator 32 with the second air supply duct 1162 are all optional embodiments of the present application.

Optionally, the first evaporator 31 and the second evaporator 32 are arranged at intervals, and a return air cavity is defined between the first evaporator 31 and the second evaporator 32, and the return air inlet corresponds to and is communicated with the return air cavity. Here, the first evaporator 31 and the second evaporator 32 are disposed at an interval to form a return air chamber, and the return air inlet corresponds to the return air chamber, so that the air flows into the return air chamber through the return air inlet and then flows to the first evaporator 31 and the second evaporator 32 on both sides, respectively, thereby preventing the air flows flowing to the two evaporators 3 from interfering with each other.

Optionally, the number of the return air inlets is one or more, and the plurality of return air inlets can increase the return air quantity of the refrigerator. At least one of the top of the evaporator cavity 132, the bottom of the evaporator cavity 132, and the sidewall 11 of the evaporator cavity 132 facing the storage cavity 131 is provided with a return air opening. Here, the air return opening is provided in the evaporator cavity 132, and the air return opening is not provided in the side wall 11 of the inner container 1, and the positions of the air return opening and the air supply opening 117 are relatively moderate no matter where the air is discharged from the internal space 13, so that the uniformity of the airflow flowing in the internal space 13 can be improved, and the uniformity of the temperature can be further improved. The air in each area of the inner space 13 can be returned to the refrigerating cavity nearby and then recycled, vortex can be avoided, waste of air volume is avoided, air return volume in the refrigerator is improved, and the refrigerating effect is finally improved.

Optionally, at least one of the top of the return air chamber, the side of the return air chamber facing the storage chamber 131, and the bottom of the return air chamber is provided with a return air inlet. The return air inlet is arranged in the return air cavity, so that the loss of air flow flowing into the return air cavity can be reduced, and the smoothness of return air is improved.

Optionally, when the number of the air returns is plural, the air return defining the top of the evaporator cavity 132 is the first air return 21, the air return at the bottom of the evaporator cavity 132 is the third air return 23, and the air return of the evaporator cavity 132 facing the sidewall 11 of the storage cavity 131 is the second air return 22. The first air return opening 21, the second air return opening 22 and the third air return opening 23 correspond to each other, so that the inlet air of the first air return opening 21, the second air return opening 22 and the third air return opening 23 can be mixed in the air return cavity more quickly and flow into the evaporator 3 quickly.

Optionally, the flow area of the return air inlet is matched with the return air cavity, namely, the flow area of the return air inlet is close to or the same as the sectional area of the return air cavity, so that the return air quantity of the return air inlet can be increased, the smoothness of the return air is improved, and the energy consumption is saved.

Optionally, the bottom wall 12 of the inner container 1 partially protrudes upward to form a step 115, the compressor 96 is placed below the step 115, the return air cover plate 2 covers the step 115, the return air cover plate 2 and the step 115 enclose the evaporator cavity 132, and the evaporator 3 is located above the step 115. The freezer needs to be provided with a compressor 96, a condenser and other components, so the bottom wall 12 of the inner container 1 protrudes upwards to form a step 115, and the lower part of the step 115 is used for avoiding the compressor 96. This application locates the top of step 115 with return air apron 2, and the lateral wall 11 of return air apron 2, step 115 and inner bag 1 can enclose out the evaporimeter chamber 132 like this. The evaporator 3 is positioned above the step 115, so that the evaporator 3 does not occupy too much space in the horizontal direction of the inner space 13, the storage volume of the storage cavity 131 is ensured, the evaporator cavity 132 is more compact, and the heavy feeling in the refrigerator is reduced.

Alternatively, as shown in fig. 6, the bottom wall 12 of the evaporator chamber 132 is provided with a drain opening 37, and the drain opening 37 is used for discharging the defrosting water of the evaporator 3. When there is one evaporator 3, the evaporator 3 is inclined toward the drain port 37 so as to drain the defrosted water of the evaporator 3.

Alternatively, when the number of evaporators 3 is plural, the number of the drain ports 37 may be one or plural, and when the number of the drain ports 37 is one, the plurality of evaporators 3 share one drain port 37. When the number of the water discharge ports 37 is plural, at least one water discharge port 37 is provided for each evaporator 3. When the evaporator 3 includes the first evaporator 31 and the second evaporator 32, the defrosting water of both the first evaporator 31 and the second evaporator 32 can be discharged through the drain.

In one embodiment, the drain 37 is located between the first evaporator 31 and the second evaporator 32. Here, the evaporator 3 can be defrosted by heating, and the defrosted water generated by the evaporator 3 can flow to the drain port 37 and then be discharged out of the refrigerator.

Alternatively, as shown in fig. 8, the evaporator 3 is disposed obliquely toward the drain port 37 to facilitate the flow of the defrost water. Alternatively, the first evaporator 31 is inclined downward in a direction from the first sidewall 111 to the second sidewall 112 so that the defrosted water of the first evaporator 31 flows to the drain opening 37; and/or, the second evaporator 32 is inclined downward in a direction from the second sidewall 112 to the first sidewall 111, so that the defrosting water of the second evaporator 32 flows to the drain opening 37. In this embodiment, the evaporator 3 is disposed obliquely to facilitate the discharge of the defrosting water.

Alternatively, when the evaporator 3 is plural, plural evaporators 3 are arranged in series. This can reduce the piping arrangement of the muffler and the capillary 4. Specifically, the first evaporator 31 and the second evaporator 32 are disposed in series. In this way, the temperatures of the first evaporator 31 and the second evaporator 32 can be uniformly controlled, so that the temperatures of the airflows flowing out from the two air supply ducts 116 are similar or consistent.

Optionally, the refrigerator further comprises a first air return pipe, a communicating pipe and a first capillary pipe, the first air return pipe communicating with the outlet of the first evaporator 31 at the inlet of the compressor 96. The communication pipe communicates between the outlet of the first evaporator 31 and the inlet of the second evaporator 32. The first capillary tube communicates between the outlet of the condenser and the inlet of the second evaporator 32. Here, the refrigerant flowing out of the condenser flows into the evaporator 3 through the first capillary tube, is evaporated in the evaporator 3, and then flows into the compressor 96 through the first regenerative flow tube, and the compressor 96 compresses the refrigerant to a high-temperature and high-pressure gas, and then flows into the condenser. The first capillary tube and the first heat return tube realize a flow circuit of the refrigerant in the two evaporators 3.

Optionally, the communicating tube abuts the bottom wall 12, and in particular, the communicating tube abuts or is close to the bottom wall 12. Here, a communicating pipe is connected between the first evaporator 31 and the second evaporator 32, the communicating pipe is located in the return air chamber, and the airflow flowing in from the return air port passes through the communicating pipe. Therefore, the uncertainty that the communicating pipe is hung in the air can be reduced, and the refrigerating cabinet can be close to a heating defrosting device of the refrigerating cabinet, such as a heating pipe or a first heating wire, so that the communicating pipe and the evaporator 3 can be defrosted better.

Alternatively, a plurality of evaporators 3 are arranged in parallel. For example, the first evaporator 31 and the second evaporator 32 are arranged in parallel. Make every evaporimeter 3 can independent control like this, and then can independent control two air supply duct 116's air-out temperature, avoid two evaporimeters 3 mutual interferences.

Optionally, when the first evaporator 31 and the second evaporator 32 are disposed in parallel, the refrigerator further includes a second air return pipe and a second capillary pipe, and the second air return pipe is communicated with both the inlet of the first evaporator 31 and the inlet of the second evaporator 32. The second capillary tube communicates with both the outlet of the first evaporator 31 and the outlet of the second evaporator 32. Here, the refrigerant flowing out of the condenser flows through the second capillary tube to the first evaporator 31 and the second evaporator 32, respectively, and the refrigerant flowing through the first evaporator 31 and the second evaporator 32 again flows into the second heat recovery tube, respectively, and then flows into the compressor 96.

Optionally, the freezer further includes switches, the switches are the same in number and correspond to the evaporators 3 one by one, and the switches are disposed on the second capillary tubes. The switch is used for controlling the second capillary and the intercommunication of the evaporator 3 that the switch corresponds, and the user can adjust the switch according to the demand when using like this, and then adjusts the switching of every evaporator 3 to satisfy different air-out forms.

Optionally, the distance between the fan 8 and the bottom of the evaporator cavity 132 is smaller than the distance between the fan 8 and the upper end face of the inner container 1. In this embodiment, the height of the fan 8 is reduced, so that the height of the evaporator cavity 132 corresponding to the fan 8 can be reduced, and further more upper space can be avoided, and the volume of the inner container 1 is increased.

Alternatively, as shown in fig. 5, the return air cover plate 2 is of a one-piece structure. So as to facilitate the production and installation of the return air cover plate 2.

Optionally, the return air cover plate 2 includes a plurality of sub cover plates, and the sub cover plates are detachably connected or spliced with each other. Here. The multiple sub-cover plates can be disassembled or spliced, so that the evaporator cavity 132 can be opened for maintenance and replacement. And the freezer is convenient for accomodate and place return air apron 2 in processing, transportation, dismouting in-process.

Optionally, at least two of the plurality of sub-cover plates are detachably connected with the liner 1. In this embodiment, the plurality of sub-cover plates are detachably connected with the inner container 1, so that the sub-cover plates can be conveniently detached, and the connection stability of the sub-cover plates is also convenient. The plurality of sub-cover plates can be detachably connected with the inner container 1, and part of the sub-cover plates can be connected with the inner container 1.

Alternatively, as shown in fig. 5, the plurality of sub-cover plates includes a first sub-cover plate 24, a second sub-cover plate 25, and a third sub-cover plate 26, and one end of the first sub-cover plate 24 is connected to the first sidewall 111. One end of the second sub-cover plate 25 is connected to the second sidewall 112 of the liner 1, and the second sidewall 112 and the first sidewall 111 are disposed opposite to each other along the width direction of the liner 1. The third sub-cover 26 is connected between the other end of the first sub-cover 24 and the other end of the second sub-cover 25. Here, the first sub-cover 24 is connected to the first sidewall 111, and the second sub-cover 25 is connected to the second sidewall 112, so that the first sub-cover 24 and the second sub-cover 25 can be relatively fixed. The third sub-cover 26 is connected between the first sub-cover 24 and the second sub-cover 25, thereby realizing the connection of the three-segment sub-cover.

Optionally, the third sub-cover 26 is provided with an air return opening, and since the third sub-cover 26 is connected between the first sub-cover 24 and the second sub-cover 25, the air return opening is provided in the third sub-cover 26, which facilitates the return of air from the middle of the return cover 2.

Optionally, a third sub-cover plate 26 corresponds to the return air chamber. It can be understood that: the third sub-cover plate 26 encloses a return air chamber with the top wall of the step 115. Thus, when the return air cavity or the return air inlet needs to be cleaned or the evaporator 3 needs to be overhauled, only the third sub-cover plate 26 needs to be opened. Moreover, since the third sub-cover 26 of the present application overlaps the first sub-cover 24 and the second sub-cover 25, the detachment of the first sub-cover 24 does not affect the first sub-cover 24 and the second sub-cover 25.

Optionally, the storage chamber 131 and the evaporator chamber 132 are disposed along a length direction of the inner bladder. Each sub-cover plate comprises a top plate 271 and side plates 27, and the top plate 271 is positioned above the step 115. The side plate 27 is connected to one end of the top plate 271 and extends downwards, and the side plate 27 is positioned outside the side wall of the step 115 facing the storage cavity; wherein, roof 271 is connected with the third lateral wall, and the lateral plate is connected with the lateral wall that the step was towards the storing chamber. Optionally, the air return cover plate is an L-shaped cover plate, so that the space of the air return cover plate in the horizontal direction occupying the inner space can be reduced,

in this embodiment, the top plate 271 is used to enclose the step to form an evaporator chamber. The curb plate is used for enclosing the side in evaporimeter chamber on the one hand, and on the other hand curb plate downwardly extending is connected with the step, can increase the connection stability of return air apron like this.

The above description and the drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The examples merely typify 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. 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. A copper aluminum pipe connecting device is characterized by comprising:

a copper tube;

the aluminum pipe is fixedly connected with and contacted with the copper pipe;

and the magnesium rod is arranged on the outer sides of the copper pipe and the aluminum pipe and is in contact with the copper pipe and the aluminum pipe.

2. The copper aluminum pipe connection according to claim 1,

the magnesium rod is at least partially sleeved on the outer side of the joint of the copper pipe and the aluminum pipe.

3. The copper aluminum pipe connecting device according to claim 1,

the magnesium rod comprises a plurality of first connecting sections, and the first connecting sections are sequentially connected along the circumferential direction, so that the magnesium rod is sleeved on the outer sides of the copper pipe and the aluminum pipe.

4. The copper aluminum pipe connection apparatus of claim 1, further comprising:

and the plastic pipe is at least partially sleeved outside the magnesium rod so as to realize the connection of the magnesium rod, the copper pipe and the aluminum pipe.

5. The copper aluminum pipe connection according to claim 4,

the aluminum pipe is provided with a first limiting part, the plastic pipe is provided with a first limiting matching part, and when the first limiting part is matched with the first limiting matching part, the plastic pipe limits movement towards a first direction;

the copper pipe is provided with a second limiting part, the plastic pipe is provided with a second limiting matching part, the second limiting part is matched with the second limiting matching part, the plastic pipe is limited to move towards a second direction, the second direction is opposite to the first direction, and the first direction and the second direction are consistent with the extending direction of the copper pipe and the extending direction of the aluminum pipe.

6. The copper-aluminum pipe connection according to claim 4, further comprising:

and the fastening sealing ring is sleeved on the outer side of the plastic pipe and is used for fixing the plastic pipe and the copper pipe or the aluminum pipe.

7. The copper aluminum pipe connecting device according to claim 6, wherein a sealing oil is provided between the fastening sealing ring and the plastic pipe.

8. The copper-aluminum pipe connection according to any one of claims 4 to 7,

the plastic tube is a transparent tube; and/or the presence of a gas in the gas,

the plastic tubing includes a plurality of second linkage segments, and is a plurality of the second linkage segment sets gradually along circumference to make the plastic tubing cover is located the outside of magnesium stick.

9. An evaporator comprising the copper aluminum pipe connecting device as recited in any one of claims 1 to 8.

10. A refrigeration apparatus comprising the evaporator of claim 9.

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