CN218120257U

CN218120257U - Heat exchanger and air conditioner

Info

Publication number: CN218120257U
Application number: CN202221974940.7U
Authority: CN
Inventors: 丁爽; 王飞; 许文明; 李阳; 张心怡
Original assignee: Zhengzhou Haier Air Conditioner Co ltd; Qingdao Haier Air Conditioner Gen Corp Ltd; Qingdao Haier Air Conditioning Electric Co Ltd; Haier Smart Home Co Ltd
Current assignee: Zhengzhou Haier Air Conditioner Co ltd; Qingdao Haier Air Conditioner Gen Corp Ltd; Qingdao Haier Air Conditioning Electric Co Ltd; Haier Smart Home Co Ltd
Priority date: 2022-07-26
Filing date: 2022-07-26
Publication date: 2022-12-23
Anticipated expiration: 2032-07-26

Abstract

The application relates to the technical field of air conditioners, and discloses a heat exchanger, includes: the heat exchange pipeline comprises a first heat exchange branch and a second heat exchange branch which are communicated; the liquid storage tank is connected in series between the first heat exchange branch and the second heat exchange branch and is used for storing the refrigerant, and the refrigerant circularly flows between the liquid storage tank and the heat exchange pipeline; the first pipeline is communicated with the liquid storage tank and the first heat exchange branch and extends into the liquid storage tank from the bottom of the liquid storage tank; the second pipeline is communicated with the liquid storage tank and the second heat exchange branch and extends into the liquid storage tank from the bottom of the liquid storage tank; the plane of the pipe orifice of the first pipeline is lower than the plane of the pipe orifice of the second pipeline, and the plane of the pipe orifice of the second pipeline is higher than the liquid level of the refrigerant in the liquid storage tank. Therefore, the liquid refrigerant can be discharged from the first pipeline preferentially under the heating working condition, and the normal operation of the heat exchanger is ensured. The application also discloses an air conditioner.

Description

Heat exchanger and air conditioner

Technical Field

The application relates to the technical field of air conditioners, for example to a heat exchanger and an air conditioner.

Background

At present, an air conditioner, as a very common electric appliance, can operate in a cooling or heating mode to adjust the indoor temperature of a user, and is widely applied to various living or working environments such as homes, offices, markets and the like. The optimal refrigerant amount required by the air conditioner is different when the air conditioner operates under different working conditions or different loads. For example, when an air conditioner refrigerates, the heat exchange coefficient of the condenser is larger, and the content of liquid refrigerant in the condenser is increased. However, at this time, the refrigerant flow rate required by the evaporator is small, that is, the actual refrigerant flow rate is larger than the refrigerant flow rate required by the system, thereby causing energy efficiency loss of the system.

The related technology discloses a refrigerant circulation flow self-adaptive system, wherein a refrigerant liquid storage tank is additionally arranged on a condenser, the pipeline structure in the condenser is redesigned, the gas-liquid components in the liquid storage tank are different under different working conditions, the liquid quantity stored in the liquid storage tank is also different, and the liquid level position of an inlet and outlet pipeline is reasonably designed, so that the effective adjustment of the system circulation refrigerant quantity is realized through the liquid storage tank.

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 arrangement of the existing inlet pipeline and outlet pipeline is not beneficial to the gas-liquid separation of the refrigerant in the liquid storage tank, so that the gaseous refrigerant of the outlet pipeline of the liquid storage tank can not meet the flow demand of the evaporator.

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 nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.

The embodiment of the disclosure provides a heat exchanger and an air conditioner, so as to re-arrange an inlet pipeline and an outlet pipeline, thereby not only meeting the requirement of reducing the refrigerant flow of a refrigerant circulation loop under the refrigeration working condition, but also avoiding the normal use of the heat exchanger under the refrigeration working condition.

In some embodiments, the heat exchanger comprises:

the heat exchange pipeline comprises a first heat exchange branch and a second heat exchange branch which are communicated;

the liquid storage tank is connected in series between the first heat exchange branch and the second heat exchange branch and is used for storing a refrigerant, and the refrigerant circularly flows between the liquid storage tank and the heat exchange pipeline;

the first pipeline is communicated with the liquid storage tank and the first heat exchange branch and extends into the liquid storage tank from the bottom of the liquid storage tank;

the second pipeline is communicated with the liquid storage tank and the second heat exchange branch and extends into the liquid storage tank from the bottom of the liquid storage tank;

the plane of the pipe orifice of the first pipeline is lower than the plane of the pipe orifice of the second pipeline, and the plane of the pipe orifice of the second pipeline is higher than the liquid level of the refrigerant in the liquid storage tank.

In some embodiments, the orifice of the second tube is inclined to enlarge the air intake area of the second tube to accelerate the gaseous refrigerant to enter the second tube.

In some embodiments, the pipe orifice of the second pipeline is arranged obliquely downwards towards the side of the first pipeline, so as to shorten the distance from the pipe orifice of the second pipeline to the first pipeline and accelerate the gaseous refrigerant after gas-liquid separation of the two-phase refrigerant flowing into the liquid storage tank from the first pipeline to enter the second pipeline.

In some embodiments, the top of the liquid storage tank is configured with an inclined flow guide surface structure, and the flow guide surface structure is positioned above the first pipeline to accelerate the flow of the gaseous refrigerant into the second pipeline through the flow guide surface structure.

In some embodiments, further comprising:

and the flow guide piece is arranged in the liquid storage tank and used for guiding the gaseous refrigerant in the liquid storage tank to the second pipeline so as to accelerate the discharge of the gaseous refrigerant.

In some embodiments, the second conduit comprises:

a pipe body;

and the thread structure is formed on the outer side wall of the pipe body along the axial direction of the pipe body, so that the refrigerant flows along the thread structure to form a liquid film so as to enhance gas-liquid separation.

In some embodiments, the thread structure is convexly formed on the outer side wall of the tube body, or the thread structure is concavely formed from the outer side wall of the tube body.

In some embodiments, the second conduit comprises:

a pipe body;

and the groove structure is formed on the outer side wall of the pipe body, so that the refrigerant flows along the groove structure to form a liquid film, and the gas-liquid separation is enhanced.

In some embodiments, the second pipeline has a pipe diameter larger than that of the first pipeline to accelerate the gaseous refrigerant to flow out of the second pipeline.

In some embodiments, the air conditioner includes: the heat exchanger provided in the foregoing embodiment.

The heat exchanger and the air conditioner provided by the embodiment of the disclosure can realize the following technical effects:

when the heat exchanger provided by the embodiment of the disclosure is used as an outdoor heat exchanger, in a cooling mode, a compressor discharges high-temperature and high-pressure refrigerant to the outdoor heat exchanger, and the refrigerant exchanges heat in a heat exchange pipeline. When the refrigerant of the first heat exchange branch flows into the liquid storage tank through the first pipeline, part of liquid refrigerant is stored, and therefore the refrigerant flow of the refrigerant circulating loop is reduced. Therefore, the running frequency of the compressor is reduced, and the energy efficiency loss of the air conditioner is reduced. Stretch into and the mouth of pipe place plane of first pipeline is less than the mouth of pipe place plane of second pipeline from the bottom of liquid storage pot through first pipeline and second pipeline, and the mouth of pipe place plane of second pipeline is higher than the liquid level of refrigerant in the liquid storage pot, not only under the refrigeration operating mode, help accelerating the discharge of gaseous refrigerant, and under the condition of heating, help flowing into the gas-liquid separation effect of refrigerant in the liquid storage pot from the second pipeline moreover, and liquid refrigerant preferentially flows from first pipeline, thereby guarantee the normal operating of heat exchanger.

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 in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:

fig. 1 is a system schematic diagram of the air conditioner provided by the embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of the heat exchanger provided by the embodiment of the disclosure;

FIG. 3 is another schematic structural diagram of the heat exchanger provided by the embodiment of the disclosure;

FIG. 4 is another schematic structural diagram of the heat exchanger provided by the embodiment of the disclosure;

fig. 5 is a schematic structural diagram of the refrigerant flowing in the heat exchanger under the heating condition according to the embodiment of the present disclosure;

fig. 6 is another schematic structural diagram of the heat exchanger provided by the embodiment of the disclosure.

Reference numerals are as follows:

10: a heat exchange line; 101: a first heat exchange branch; 102: a second heat exchange branch; 103: a heat exchanger body; 20: a liquid storage tank; 201: a liquid storage cavity; 202: a flow guide surface structure; 30: a first pipeline; 40: a second pipeline; 401: a pipe body; 402: a thread structure; 100: an indoor heat exchanger; 200: an outdoor heat exchanger; 300: a throttling device; 400: 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 in other meanings besides orientation or positional relationship, for example, the term "upper" may also be used in some cases to indicate a certain attaching or connecting relationship. The specific meanings of these terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art as appropriate.

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.

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

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.

The embodiment of the present disclosure provides an air conditioner, which includes an indoor heat exchanger 100, an outdoor heat exchanger 200, a throttling device 300, and a compressor 400, wherein the indoor heat exchanger 100, the outdoor heat exchanger 200, the throttling device 300, and the compressor 400 are connected by a refrigerant pipeline to form a refrigerant circulation loop, and the refrigerant passes through the refrigerant circulation loop along the set flow direction of different operation modes to realize different operation modes such as a cooling mode and a heating mode. The refrigeration modes of the air conditioner include different refrigeration operation modes such as rated refrigeration, intermediate refrigeration, low-temperature intermediate refrigeration, and the like, and the loads of the different refrigeration operation modes are different, so that the optimal refrigerant amount in the required refrigerant circulation circuit is also different.

The embodiment of the disclosure simultaneously provides a heat exchanger. The heat exchanger may be the indoor heat exchanger 100 or the outdoor heat exchanger 200 of the aforementioned air conditioner.

The following description will be made in detail in a cooling mode and a heating mode of the air conditioner operation, taking a heat exchanger as the outdoor heat exchanger 200 as an example. As shown in connection with fig. 2 to 6. Fig. 2 to 4 show the flow direction of the refrigerant in the heat exchanger under the cooling condition, and fig. 5 and 6 show the flow direction of the refrigerant in the heat exchanger under the heating condition.

Referring to fig. 2 to 6, the heat exchanger provided in the present embodiment includes a heat exchange pipeline 10, a receiver tank 20, a first pipeline 30 and a second pipeline 40. The heat exchange pipeline 10 is arranged on the heat exchanger body 103, and the refrigerant flows through the heat exchange pipeline 10 to exchange heat with the heat exchanger body 103. The liquid storage tank 20 is located at the side part of the heat exchanger body 103, and the liquid storage tank 20 not only can store part of the refrigerant, but also can provide a certain space for the gas-liquid separation of the two-phase refrigerant after flowing into the liquid storage tank 20, thereby achieving the effects of flow regulation and energy saving. Under the refrigeration condition, the first pipeline 30 is a liquid inlet pipe, and the second pipeline 40 is a liquid outlet pipe. In the heating mode, the second pipe 40 is a liquid inlet pipe, and the first pipe 30 is a liquid outlet pipe.

The heat exchange pipeline 10 comprises a first heat exchange branch 101 and a second heat exchange branch 102 which are communicated with each other. The liquid storage tank 20 is connected in series between the first heat exchange branch 101 and the second heat exchange branch 102, and is used for storing the refrigerant, and the refrigerant circulates between the liquid storage tank 20 and the heat exchange pipeline 10. Refrigerant circulates between the first heat exchange branch 101, the receiver tank 20 and the second heat exchange branch 102. The first heat exchange branch 101 is a set of multiple flow paths or a set of multiple flow sections communicated with each other on one flow path. Similarly, second heat exchange branch 102 is a collection of multiple flow paths or a collection of multiple flow sections connected together in a flow path.

Under the cooling condition, the refrigerant flows into the liquid storage tank 20 from the first heat exchange branch 101, and then the gaseous refrigerant flows out to the second heat exchange branch 102. In the heating condition, the refrigerant flows into the receiver 20 from the second heat exchange branch 102, and then the liquid refrigerant flows out to the first heat exchange branch 101.

The first pipeline 30 communicates the liquid storage tank 20 with the first heat exchange branch 101, and extends into the liquid storage tank 20 from the bottom of the liquid storage tank 20. Under the refrigeration condition, the two-phase refrigerant of the first heat exchange branch 101 flows into the liquid storage tank 20 through the first pipeline 30, the liquid refrigerant is deposited at the bottom of the liquid storage tank 20, and the gaseous refrigerant rises and is stored in the upper space of the liquid storage tank 20. Under the heating condition, the refrigerant in the receiver 20 flows out from the first pipe 30 to the first heat exchange branch 101.

The first pipeline 30 extends into the liquid storage tank 20 from the bottom of the liquid storage tank 20, so that on one hand, the influence of the two-phase refrigerant flowing out of the first pipeline 30 on the gaseous refrigerant in the upper space of the liquid storage tank 20 is avoided, on the other hand, the liquid refrigerant in the two-phase refrigerant is convenient to be directly stored at the bottom of the liquid storage tank 20, and the splashing of the liquid refrigerant when the liquid refrigerant flows downwards to the liquid level of the liquid storage tank 20 is avoided, and further the gas-liquid separation effect of the two-phase refrigerant in the liquid storage tank 20 is influenced. In addition, it is also convenient for refrigerant to flow out of the first line 30 during heating conditions.

The second pipeline 40 connects the storage tank 20 and the second heat exchange branch 102, and extends into the storage tank 20 from the bottom of the storage tank 20. In the cooling operation, the gaseous refrigerant stored in the upper space of the receiver tank 20 flows out from the second pipe 40 to the second heat exchange branch 102. In the heating condition, the refrigerant in the second heat exchange branch 102 flows into the receiver 20 from the second pipeline 40, and flows downward along the second pipeline 40, and the refrigerant undergoes gas-liquid separation during the downward flow. The liquid refrigerant flows into the bottom of the receiver 20, and the gaseous refrigerant rises and is stored in the upper space of the receiver 20.

Wherein, the plane of the pipe orifice of the first pipeline 30 is lower than the plane of the pipe orifice of the second pipeline 40, and the plane of the pipe orifice of the second pipeline 40 is higher than the liquid level of the refrigerant in the liquid storage tank 20. In this manner, the flow of gaseous refrigerant from the upper space of the receiver tank 20 is facilitated, i.e., the discharge of gaseous refrigerant is accelerated. On the other hand, the gas-liquid separation effect of the refrigerant flowing out of the second pipeline 40 in the downward flowing process is facilitated, that is, the refrigerant flows along the outer wall of the second pipeline 40, so that the refrigerant forms a liquid film on the outer wall of the second pipeline 40, the flow area is expanded, and the gas-liquid separation effect is enhanced.

When the heat exchanger provided by the embodiment of the present disclosure is used as the outdoor heat exchanger 200, in the cooling mode, the compressor 400 discharges a high-temperature and high-pressure refrigerant to the outdoor heat exchanger 200, and the refrigerant exchanges heat in the heat exchange pipeline 10. When the refrigerant of the first heat exchanging branch 101 flows into the receiver 20 through the first pipe 30, a part of the liquid refrigerant is stored, thereby reducing the refrigerant flow rate of the refrigerant circulation circuit. Thus, the operating frequency of the compressor 400 is reduced, and the energy efficiency loss of the air conditioner is reduced. The first pipeline 30 and the second pipeline 40 extend from the bottom of the liquid storage tank 20, the plane of the pipe orifice of the first pipeline 30 is lower than the plane of the pipe orifice of the second pipeline 40, and the plane of the pipe orifice of the second pipeline 40 is higher than the liquid level of the refrigerant in the liquid storage tank 20, so that the gas-liquid separation effect of the refrigerant flowing into the liquid storage tank 20 from the second pipeline 40 is facilitated, the liquid refrigerant preferentially flows out from the first pipeline 30 under the refrigeration working condition, and the normal operation of the heat exchanger is ensured.

Alternatively, the refrigerant may be a refrigerant.

Alternatively, the receiver 20 is a tank structure having a receiver chamber 201, and may store a part of the liquid refrigerant flowing in the outdoor heat exchanger 200.

In this embodiment, it can be understood that the liquid refrigerant flowing out of the first heat exchange branch 101 is partially stored. For example, in a cooling condition, the refrigerant in the first heat exchange branch 101 of the outdoor heat exchanger 200 flows into the receiver chamber 201 of the receiver 20 through the first pipeline 30, at this time, the liquid refrigerant is stored at the bottom of the receiver chamber 201, the gaseous refrigerant rises to the upper space of the receiver chamber 201, and a part of the gaseous refrigerant flows out of the second pipeline 40 to the second heat exchange branch 102. When the liquid refrigerant in the liquid storage cavity 201 reaches above the liquid full line or the liquid level of the liquid refrigerant is higher than the plane where the pipe orifice of the second pipeline 40 is located, the liquid refrigerant also flows into the second heat exchange branch 102 through the second pipeline 40, and the refrigerant lower than the liquid full line or the refrigerant lower than the pipe orifice of the second pipeline 40 is stored in the liquid storage cavity 201 and does not enter the second heat exchange branch 102 of the outdoor heat exchanger 200, that is, does not participate in the refrigerant circulation loop of the air conditioner.

Illustratively, when the outdoor ambient temperature is relatively low, the air conditioner can meet the temperature requirement of the user without exerting the maximum cooling capacity of the air conditioner, such as an intermediate cooling mode or a low-temperature intermediate cooling mode of the air conditioner. The outdoor heat exchanger 200 provided in the embodiment of the present disclosure can adjust the amount of refrigerant flowing through the outdoor heat exchanger 200 itself, and adjust the amount of refrigerant flowing into the refrigerant circulation circuit, so that the refrigerant entering the evaporator through the throttling device 300 can exchange heat in the evaporator sufficiently, thereby improving the operation energy efficiency ratio of the air conditioner.

Optionally, the first and

second conduits

30, 40 may be partially or entirely straight, particularly where the conduits within the tank 20 are straight.

In this embodiment, the pipeline of linear type has not only reduced the pipeline and has accounted for the volume in stock solution cavity 201, and then has increased the effective stock solution volume of stock solution cavity 201, but also be convenient for the refrigerant flow in or flow out fast. The volume of the reservoir 20 is reduced under the requirement of the same effective reservoir volume.

Optionally, the orifice of the second tube 40 is inclined to enlarge the air intake area of the second tube 40 to accelerate the gaseous refrigerant into the second tube 40.

The nozzle of the second pipeline 40 is arranged obliquely, i.e. the nozzle is an oblique nozzle. Thus, the orifice area of the second pipe 40 is enlarged, thereby enlarging the air intake area of the second pipe 40 and further enlarging the flow area of the gaseous refrigerant flowing into the second pipe 40.

Optionally, the pipe orifice of the second pipe 40 is arranged obliquely downward toward the side of the first pipe 30, so as to shorten the distance from the pipe orifice of the second pipe 40 to the first pipe 30, and accelerate the gaseous refrigerant after gas-liquid separation of the two-phase refrigerant flowing into the liquid storage tank 20 from the first pipe 30 to enter the second pipe 40.

The two-phase refrigerant flowing into the receiver 20 from the first pipeline 30 is separated into gas and liquid phases, and the gaseous refrigerant moves upward, and the pipe orifice of the second pipeline 40 is inclined downward toward the side of the first pipeline 30, that is, the pipe orifice of the second pipeline 40 is inclined downward toward the first pipeline 30, so that the distance from the pipe orifice of the second pipeline 40 to the pipe orifice of the first pipeline 30 is shortened, and the time for the gaseous refrigerant flowing into the second pipeline 40 after gas-liquid separation from the first pipeline 30 to flow into the second pipeline 40 is shortened, and the discharge of the gaseous refrigerant from the second pipeline 40 is accelerated.

Optionally, the top of the receiver tank 20 is configured with an angled baffle structure 202, and the baffle structure 202 is positioned above the first tube 30 to facilitate the flow of gaseous refrigerant through the baffle structure 202 and into the second tube 40.

The upper space of the first pipeline 30 in the liquid storage cavity 201 is reduced through the flow guide surface structure 202 of the liquid storage tank 20, so that the storage capacity of the gaseous refrigerant in the upper space of the first pipeline 30 is reduced, the redundant gaseous refrigerant moves towards the second pipeline 40, and further most of the gaseous refrigerant is stored in the area where the second pipeline 40 is located. Thus, under the cooling condition, the gaseous refrigerant in the liquid storage cavity 201 is accelerated to enter the second pipeline 40 and be discharged.

In addition, under the refrigeration condition, after the two-phase refrigerant flowing into the liquid storage cavity 201 from the first pipeline 30 is subjected to gas-liquid separation, when the gaseous refrigerant moves upwards to the flow guide surface structure 202, the gaseous refrigerant can be guided to the second pipeline 40 side through the flow guide surface structure 202, so that the speed of the gaseous refrigerant flowing into the second pipeline 40 is increased.

Illustratively, the baffle structure 202 may be an inclined plate disposed in the reservoir 201 and detachably connected to the top of the reservoir 20.

Illustratively, the top of the fluid reservoir tank 20 is directly beveled in production to form a beveled deflector surface structure 202.

Optionally, the heat exchanger further comprises: and the flow guide piece is arranged in the liquid storage tank 20 and is used for guiding the gaseous refrigerant in the liquid storage tank 20 to the second pipeline 40 so as to accelerate the discharge of the gaseous refrigerant.

Under the cooling condition, after the two-phase refrigerant flowing into the receiver 201 from the first pipeline 30 is subjected to gas-liquid separation, the gaseous refrigerant moves upward to the upper space of the receiver 201. The gaseous refrigerant in the liquid storage tank 20 is guided to the pipe orifice of the second pipeline 40 by the guiding element, so that the gaseous refrigerant flows out to the second heat exchange branch 102 through the second pipeline 40, thereby accelerating the discharge of the gaseous refrigerant.

Alternatively, the flow guide member may be a flow guide pipe, a flow guide surface, a flow guide groove or the like. It is not limited to this, as long as the gaseous refrigerant can be guided to the second line 40, and the discharge of the gaseous refrigerant is accelerated.

Optionally, the second conduit 40 comprises: a tube body 401; and a screw structure 402 formed on an outer side wall of the pipe body 401 in an axial direction of the pipe body 401 to allow the refrigerant to flow along the screw structure 402 to form a liquid film to enhance gas-liquid separation.

The tube 401 is a carrier through which the refrigerant flows, that is, the refrigerant flows in the tube 401.

In the heating condition, the refrigerant flows into the liquid storage tank 20 from the second pipeline 40, and the bottom of the liquid storage tank 20 is conveyed upwards. That is, the refrigerant flows out from the nozzle of the tube 401 of the second pipe 40 and flows back downward by gravity. The refrigerant flowing back along the outer side wall of the pipe body 401 flows through the thread structure 402 and flows along the thread structure 402 to form a liquid film, so that the liquid level is extended, the residence time of the refrigerant can be prolonged, the gas-liquid two-phase refrigerant is subjected to sufficient gas-liquid separation, and the gas-liquid separation effect is further enhanced.

In addition, the refrigerant flows in a laminar flow along the thread structure 402 outside the pipe body 401, and is guided by the thread structure 402, so that splashing and noise caused by liquid impact due to turbulent flow can be reduced.

Alternatively, the thread structure 402 is formed to protrude from the outer side wall of the pipe body 401, or the thread structure 402 is formed to be recessed from the outer side wall of the pipe body 401.

Through the screw thread structure 402 that outwards bulges or inwards caves in from body 401 lateral wall, when the refrigerant flows through screw thread structure 402, can form the liquid film on the lateral wall surface of body 401, in addition, the refrigerant flows along screw thread structure 402, not only prolongs the flow path of refrigerant, and can also prolong the dwell time of refrigerant for gas-liquid two-phase refrigerant carries out abundant gas-liquid separation, further strengthens gas-liquid separation effect.

Optionally, the second conduit 40 comprises: a tube body 401; and a groove structure formed on the outer side wall of the pipe body 401 so that the refrigerant flows along the groove structure to form a liquid film to enhance gas-liquid separation.

In the heating condition, the refrigerant flows into the liquid storage tank 20 from the second pipeline 40, and the bottom of the liquid storage tank 20 is conveyed upwards. That is, the refrigerant flows out from the nozzle of the tube 401 of the second pipe 40 and flows back downward by gravity. The refrigerant flowing back along the outer side wall of the pipe body 401 flows through the groove structure and flows along the groove structure to form a liquid film, so that the liquid level is extended, the retention time of the refrigerant can be prolonged, the gas-liquid two-phase refrigerant is subjected to sufficient gas-liquid separation, and the gas-liquid separation effect is further enhanced.

In addition, the refrigerant flows along the groove structure laminar flow outside the pipe body 401, and is guided by the groove structure, so that splashing and noise caused by liquid impact due to turbulent flow can be reduced.

Optionally, the groove structure is obliquely arranged to prolong the flow path of the refrigerant and delay the time for the refrigerant to flow to the bottom of the liquid storage chamber 201.

Optionally, the groove structures are multiple, and the multiple groove structures may be regularly arranged on the outer side wall of the tube body 401, or irregularly arranged on the outer side wall of the tube body 401.

Alternatively, the groove structure may be a continuous structure or a discontinuous structure.

Alternatively, the groove structure may be used in conjunction with the thread structure 402, or alternatively. In the case that the groove structure is used in combination with the thread structure 402, the groove structure is preferably disposed between two adjacent threads of the thread structure 402 at an interval. In addition, the thread structure 402 protruding outward is preferably used to further extend the liquid level and enhance the gas-liquid separation effect.

Optionally, the diameter of the second pipeline 40 is larger than that of the first pipeline 30 to accelerate the flow of the gaseous refrigerant out of the second pipeline 40.

The pipe diameter through second pipeline 40 is greater than the pipe diameter of first pipeline 30, and under the refrigeration operating mode, gaseous state refrigerant increases from the flow area that second pipeline 40 flowed out, flows through more gaseous state refrigerant in the while to accelerate gaseous state refrigerant to flow into second heat transfer branch 102 from second pipeline 40, in order to guarantee the normal operating of heat exchanger, and improve the result of use.

With reference to fig. 1 to 6, an air conditioner provided in this embodiment includes the heat exchanger provided in the above embodiment. The heat exchanger comprises a heat exchange pipeline 10, a liquid storage tank 20, a first pipeline 30 and a second pipeline 40, wherein the heat exchange pipeline 10 comprises a first heat exchange branch 101 and a second heat exchange branch 102 which are communicated, the liquid storage tank 20 is connected in series between the first heat exchange branch 101 and the second heat exchange branch 102 and used for storing a refrigerant, the refrigerant circularly flows between the liquid storage tank 20 and the heat exchange pipeline 10, the first pipeline 30 is communicated with the liquid storage tank 20 and the first heat exchange branch 101 and extends into the liquid storage tank 20 from the bottom of the liquid storage tank 20, the second pipeline 40 is communicated with the liquid storage tank 20 and the second heat exchange branch 102 and extends into the liquid storage tank 20 from the bottom of the liquid storage tank 20, the plane where a pipe orifice of the first pipeline 30 is located is lower than the plane where a pipe orifice of the second pipeline 40 is located, and the plane where a pipe orifice of the second pipeline 40 is located is higher than the liquid level of the refrigerant in the liquid storage tank 20.

With the air conditioner provided by the embodiment of the present disclosure, in the cooling mode, the compressor 400 discharges a high-temperature and high-pressure refrigerant to the outdoor heat exchanger 200, and the refrigerant exchanges heat in the heat exchange pipeline 10. When the refrigerant of the first heat exchange branch line 101 flows into the receiver tank 20 through the first pipe line 30, a part of the liquid refrigerant is stored, thereby reducing the refrigerant flow rate of the refrigerant circulation circuit. Thus, the operating frequency of the compressor 400 is reduced, and the energy efficiency loss of the air conditioner is reduced. The first pipeline 30 and the second pipeline 40 extend into the bottom of the liquid storage tank 20, the plane of the pipe orifice of the first pipeline 30 is lower than the plane of the pipe orifice of the second pipeline 40, and the plane of the pipe orifice of the second pipeline 40 is higher than the liquid level of the refrigerant in the liquid storage tank 20, so that the gas-liquid separation effect of the refrigerant flowing into the liquid storage tank 20 from the second pipeline 40 and the liquid refrigerant flowing out from the first pipeline 30 preferentially are facilitated under the refrigerating working condition, and the normal operation of the heat exchanger is ensured.

The above description and 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

1. A heat exchanger, comprising:

2. The heat exchanger of claim 1,

the pipe orifice of the second pipeline is obliquely arranged so as to enlarge the air inlet area of the second pipeline and accelerate the gaseous refrigerant to enter the second pipeline.

3. The heat exchanger of claim 2,

the pipe orifice of the second pipeline is obliquely and downwards arranged towards the side where the first pipeline is located, so that the distance from the pipe orifice of the second pipeline to the first pipeline is shortened, and the gaseous refrigerant after gas-liquid separation of the two-phase refrigerant flowing into the liquid storage tank from the first pipeline enters the second pipeline.

4. The heat exchanger of claim 1,

the top of the liquid storage tank is provided with an inclined flow guide surface structure, and the flow guide surface structure is positioned above the first pipeline so as to accelerate the gaseous refrigerant to flow into the second pipeline through the flow guide surface structure.

5. The heat exchanger of claim 1, further comprising:

6. The heat exchanger of claim 1, wherein the second conduit comprises:

a pipe body;

and the thread structure is arranged on the outer side wall of the pipe body along the axial direction of the pipe body, so that the refrigerant flows along the thread structure to form a liquid film so as to enhance gas-liquid separation.

7. The heat exchanger of claim 6,

the thread structure is convexly formed on the outer side wall of the tube body, or the thread structure is formed by inwards recessing from the outer side wall of the tube body.

8. The heat exchanger of claim 1, wherein the second conduit comprises:

a tube body;

9. The heat exchanger according to any one of claims 1 to 8,

the pipe diameter of the second pipeline is larger than that of the first pipeline so as to accelerate the gaseous refrigerant to flow out of the second pipeline.

10. An air conditioner characterized by comprising the heat exchanger according to any one of claims 1 to 9.