CN217357638U - Heat exchanger and air conditioner - Google Patents

Abstract

The application relates to the technical field of air conditioners and discloses a heat exchanger which comprises a heat exchange tube set, a third heat exchange passage and a first shunt pipeline, wherein a flow regulating element is arranged on the first shunt pipeline and used for regulating the flow of a refrigerant flowing through the first shunt pipeline; the throttling element is arranged on the third heat exchange passage and used for adjusting the flow of the refrigerant flowing through the third heat exchange passage. By adjusting the setting position of the throttling device, the refrigerant passes through the flow dividing device and respectively enters the flow regulating element and the throttling element for throttling, so that the volume of gas entering the liquid separator can be effectively reduced, the refrigerant is uniformly distributed, and the heat exchange performance is improved; the flow regulating element has the throttling function and the one-way stopping function, so that the energy efficiency of the heat exchange system is improved, the complexity of a pipeline of the heat exchange system is reduced, and the investment cost of production, inspection and other links is reduced. 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, the existing heat exchanger generally adopts a shunt pipe or a shunt to shunt, but the existing heat exchanger passes through the same pipeline when refrigerating and heating are carried out, and meets the refrigerating operation requirement through a supercooling pipeline when the heat exchanger carries out refrigeration; when the heat exchanger heats, the heat exchanger still passes through the supercooling pipeline, so that the pressure loss of the system is increased, and the heat exchange efficiency of the system is reduced.

In order to reduce the pressure loss of a system and improve the heat exchange efficiency of the system, the prior art discloses a heat exchanger which comprises a gas collecting pipe; the first heat exchange passage comprises one or more first heat exchange branch pipes, the first ends of the first heat exchange branch pipes are connected with the first pipe openings of the gas collecting pipes, and the second ends of the first heat exchange branch pipes are connected with the first flow dividing elements; the first end of the second heat exchange branch is connected with a second pipe orifice of the gas collecting pipe, and the second end of the second heat exchange branch is connected with the first shunt element; a first end of the third heat exchange branch is connected with a third pipe orifice of the gas collecting pipe, and a second end of the third heat exchange branch is connected with the second shunt element; a first end of the fourth heat exchange branch is connected with a fourth pipe orifice of the gas collecting pipe, and a second end of the fourth heat exchange branch is connected with the first shunt element; a first end of the fifth heat exchange branch is connected with a fifth pipe orifice of the gas collecting pipe, and a second end of the fifth heat exchange branch is connected with the second shunt element; a bypass line connecting the first shunt element and the second shunt element; a first check valve disposed in the bypass line, and a direction of conduction is defined to flow from the second shunt element to the first shunt element; the second one-way valve is arranged between the first pipe orifice and the second pipe orifice of the gas collecting pipe, and the conduction direction is defined to flow from the second pipe orifice to the first pipe orifice; and the third one-way valve is arranged between the third pipe orifice and the fourth pipe orifice of the gas collecting pipe, and the conduction direction is defined to flow from the fourth pipe orifice to the third pipe orifice.

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:

in the prior art heat exchanger, the throttling device is arranged between the indoor heat exchanger and the indoor-outdoor heat exchanger. After the refrigerant is depressurized and throttled by the throttling device, part of flash steam can be generated, the refrigerant enters the liquid separator of the heat exchanger to be in a gas-liquid two-phase state, and the gas-liquid two-phase state influences the working performance of the liquid separator. When the inlet dryness entering the liquid distributor is higher, the gas components are higher, the occupied volume space in the liquid distributor is larger, and further the randomness of gas flow becomes stronger, which is not beneficial to uniform distribution of refrigerants. On the other hand, in order to realize variable reposition of redundant personnel, be provided with a plurality of check valves on the pipeline, lead to the heat transfer pipeline complicated, increased the input cost of links such as production, inspection.

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, which can effectively reduce the volume of gas entering a liquid separator by adjusting the setting position of a throttling device, and are beneficial to uniform distribution of refrigerants. Meanwhile, the one-way valve has the throttling function, the using number of throttling components is reduced, and the complexity of a heat exchange system pipeline is further reduced.

In some embodiments, a heat exchanger comprises: the heat exchange tube set comprises a first flow dividing element and a second flow dividing element which are connected to the same heat exchange passage; a first end of the third heat exchange passage is connected with the second flow dividing element, and a second end of the third heat exchange passage is connected with a third flow dividing element; a first shunt pipeline, the first end of which is connected with the first shunt element and the second end of which is connected with the third shunt element; the flow regulating element is arranged on the first shunt pipeline and used for regulating the flow of the refrigerant flowing through the first shunt pipeline, and the conduction direction of the flow regulating element is limited to flow from the second end of the first shunt pipeline to the first end of the first shunt pipeline; and the throttling element is arranged on the third heat exchange passage and used for adjusting the flow of the refrigerant flowing through the third heat exchange passage.

In some embodiments, an air conditioner includes a refrigerant circulation loop including at least an indoor heat exchanger, an outdoor heat exchanger, and a compressor, wherein the indoor heat exchanger and/or the outdoor heat exchanger is/are the heat exchanger according to the previous embodiment.

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

by adjusting the setting position of the throttling device, the refrigerant passes through the flow dividing device and respectively enters the flow regulating element and the throttling element for throttling, so that the volume of gas entering the liquid separator can be effectively reduced, the refrigerant is uniformly distributed, and the heat exchange performance is improved; the flow regulating element has the throttling function and the one-way stopping function, so that variable shunting of the heat exchanger can be realized, and the throttling function can be realized. Therefore, the energy efficiency of the heat exchange system is improved, the complexity of the pipeline of the heat exchange system is reduced, and the investment cost of production, inspection and other links is reduced.

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 first schematic structural diagram of a heat exchanger provided in an embodiment of the present disclosure;

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

fig. 3 is a schematic view illustrating a flow direction of a refrigerant under a heating condition according to an embodiment of the disclosure;

fig. 4 is a schematic diagram of a refrigerant flow direction under a refrigeration condition according to an embodiment of the disclosure;

fig. 5 is a schematic structural diagram of an air conditioner provided in the embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a check valve provided by embodiments of the present disclosure;

fig. 7 is a schematic structural diagram of another check valve provided by the embodiments of the present disclosure.

Reference numerals:

100: a gas collecting pipe; 101: a first nozzle; 102: a second orifice; 103: a first header port; 104: a second header port;

200: a first heat exchange path; 300: a second heat exchange path;

400: a third heat exchange path; 401: a throttling element;

500: a second shunt line; 501: a one-way valve;

600: a first shunt line; 601: a flow regulating element;

701: a first shunt element; 702: a second flow dividing element; 703: a third flow dividing element;

800: a housing;

10: a valve body;

20: a limiting structure; 21: a valve seat; 22: a valve plate;

30: a valve core; 31: a fluid channel; 32: a first orifice; 33: a second orifice;

40: an indoor heat exchanger; 50: an outdoor heat exchanger; 60: a compressor.

Detailed Description

So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. 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 in the claims, and the above-described drawings of embodiments of the present disclosure, 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 as appropriate for the embodiments of the disclosure described herein. 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, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the 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 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. E.g., 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 air conditioner comprises an indoor unit and an outdoor unit, wherein the indoor unit is provided with an indoor heat exchanger, an indoor fan and the like and can be used for realizing the functions of heat exchange and the like between a refrigerant and an indoor environment; the outdoor unit is provided with an outdoor heat exchanger, an outdoor fan, a throttling device, a compressor, a gas-liquid separator and the like, and can be used for realizing the functions of heat exchange, refrigerant compression, refrigerant throttling and the like by matching with a refrigerant and an outdoor environment.

The indoor heat exchanger, the outdoor heat exchanger, the throttling device, the compressor, the gas-liquid separator and other components are connected through refrigerant pipelines to form a refrigerant circulating system for circularly conveying the refrigerant between the indoor unit and the outdoor unit; optionally, the refrigerant circulation system is at least limited to two refrigerant flow directions respectively used for a heating mode or a cooling mode, specifically, when the air conditioner operates in the cooling mode, the refrigerant circulation system conveys the refrigerant in a first refrigerant flow direction, and after being discharged from the compressor, the refrigerant sequentially flows through the outdoor heat exchanger, the throttling device and the indoor heat exchanger, and then flows back to the compressor through the gas-liquid separator; and when the air conditioner operates in a heating mode, the refrigerant circulating system conveys the refrigerant in a second refrigerant flow direction, and the refrigerant flows through the indoor heat exchanger, the throttling device and the outdoor heat exchanger in sequence after being discharged from the compressor and then flows back to the compressor through the gas-liquid separator.

In the heat exchanger and the air conditioner related to the embodiment of the disclosure, through the arrangement of the flow regulating element and the throttling element, the heat exchanger can respectively convey refrigerants through different flow paths in different air conditioning modes, the complexity of a pipeline is reduced, the refrigerant distribution is more uniform, and the heat exchanger can simultaneously exert the optimal performance of cooling and heating. Most of the embodiments provided by the application are the embodiments when the heat exchanger is used as an outdoor heat exchanger.

Referring to fig. 5, an embodiment of the present disclosure provides an air conditioner, including a refrigerant circulation loop at least including an indoor heat exchanger 40, an outdoor heat exchanger 50, and a compressor 60, where the indoor heat exchanger 40 and/or the outdoor heat exchanger 50 are heat exchangers formed as follows. The heat exchanger includes: a heat exchange tube set, a third heat exchange path 400, a throttling element 401, a first shunt path 600 and a flow regulating element 601.

During heating operation, the refrigerant in the pipe is in a low-temperature low-pressure area, and the heat transfer performance is mainly constrained by the heat transfer coefficient and the pressure drop together, so that the refrigerant flows downwards, is throttled by the flow regulating element 601 and the throttling element 401 and then respectively enters the first heat exchange passage 200, the second heat exchange passage 300 and the third heat exchange passage 400 of the heat exchange pipe set, and the refrigerant respectively enters all different branches, so that the pressure drop can be greatly reduced while the heat transfer coefficient is ensured, the system pressure is increased, and the low-temperature heating capacity is improved.

When in refrigeration operation, the refrigerant in the pipe is in a high-temperature and high-pressure area, the heat transfer performance is mainly influenced by the heat transfer coefficient, the pressure drop does not influence the refrigeration heat transfer performance, and the refrigerant is suitable for relatively fewer branches. Therefore, when the refrigerant flows downwards, the refrigerant sequentially passes through the first heat exchange passage 200, the second heat exchange passage 300 and the third heat exchange passage 400 of the heat exchange tube set, so that the refrigerant passes through a flow path and flows through the heat exchanger, circulation can be accelerated, the heat transfer coefficient can be increased, and high-temperature refrigerating capacity can be improved. Therefore, the heat exchanger can meet the requirements of multiple branches of the evaporator and fewer branches of the condenser.

By adopting the heat exchanger and the air conditioner provided by the embodiment of the disclosure, the setting position of the throttling device is adjusted, so that the refrigerant passes through the flow dividing device and respectively enters the flow regulating element and the throttling element for throttling, the volume of gas entering the liquid divider can be effectively reduced, the refrigerant is uniformly distributed, and the heat exchange performance is improved; the flow regulating element has the throttling function and the one-way stopping function, so that variable shunting of the heat exchanger can be realized, and the throttling function can be realized. Therefore, the energy efficiency of the heat exchange system is improved, the complexity of the pipeline of the heat exchange system is reduced, and the investment cost of production, inspection and other links is reduced.

As shown in fig. 1 to 2, in the present embodiment, the heat exchanger includes a heat exchange tube group including a gas collecting tube 100; a first heat exchange path 200, a first end of which is connected to the first pipe orifice 101 of the gas collecting pipe 100, and a second end of which is connected to the first flow dividing element 701; a second heat exchange path 300 having a first end connected to the first flow dividing element 701 and a second end connected to the second flow dividing element 702; a second shunt pipeline 500, a first end of which is connected to the second pipe port 102 of the gas collecting pipe 100, and a second end of which is connected to the second shunt element 702; the check valve 501 is disposed on the second shunt pipe 500, and a conduction direction of the check valve 501 is defined as flowing from the second end of the second shunt pipe 500 to the first end of the second shunt pipe 500.

The heat exchanger further comprises a third heat exchange path 400, the first end of which is connected to the second flow dividing element 702 and the second end of which is connected to a third flow dividing element 703; a first shunt line 600 having a first end connected to the first shunt element 701 and a second end connected to the third shunt element 703; a flow rate adjusting element 601, disposed on the first shunt pipeline 600, for adjusting a flow rate of the refrigerant flowing through the first shunt pipeline 600, and a conduction direction of the flow rate adjusting element 601 is defined as flowing from the second end of the first shunt pipeline 600 to the first end of the first shunt pipeline 600; and a throttling element 401 disposed in the third heat exchange path 400 for adjusting the flow rate of the refrigerant flowing through the third heat exchange path 400.

Referring to fig. 3, when the heating flow is downward, the low-temperature and low-pressure refrigerant enters the third flow dividing element 703 from the second header 104, after being divided, the refrigerant enters the third heat exchange passage 400 and the second end of the first flow dividing passage 600, and after being throttled by the throttling element 401, the refrigerant entering the third heat exchange passage 400 enters the heat exchanger body to exchange heat and flows into the second flow dividing element 702; the refrigerant introduced into the first branch line 600 passes through the flow rate adjusting member 601. At this time, the conduction direction of the flow rate adjusting element 601 is from the second end of the first shunt pipeline 600 to the first end of the first shunt pipeline 600, and the refrigerant throttles by the flow rate adjusting element 601, enters the first shunt element 701, shunts, enters the first heat exchange passage 200 and the second heat exchange passage 300 respectively, and exchanges heat by the heat exchange body respectively. The second heat exchange path 300 and the third heat exchange path 400 converge to enter the second shunt element 702, then enter the second shunt line 500, and enter the gas collecting pipe 100 through the flow check valve 501, the conduction direction of the check valve 501 is defined as flowing from the second end of the second shunt line 500 to the first end of the second shunt line 500, and the refrigerants of the first heat exchange path 200, the second heat exchange path 300 and the third heat exchange path 400 are mixed by the gas collecting pipe 100 and then flow out from the first main port 103. It can be seen that, the heat exchanger provided by the embodiment of the present disclosure can effectively reduce the volume of gas entering the liquid separator due to the arrangement of the throttling element 401 and the flow regulating element 601 in the heating flow direction, so as to uniformly distribute the refrigerant, further improve the system pressure, enable the refrigerant to fully exchange heat with the surrounding environment, and improve the heating efficiency of the air conditioner. Meanwhile, the existing one-way valve has a throttling function, and the complexity of a heat exchange system pipeline is reduced.

Referring to fig. 4, when the refrigerant flows downward, the high-temperature and high-pressure refrigerant enters the gas collecting pipe 100 from the first main port 103, enters the first heat exchanging passage 200 after being split, enters the heat exchanging body for heat exchanging, and enters the first splitting element 701. Since the conduction direction of the check valve 501 is defined as flowing from the second end of the second shunt pipe 500 to the first end of the second shunt pipe 500, and does not flow through the second shunt pipe 500; the heat is split by the first splitting element 701 and then enters the second heat exchange passage 300, enters the heat exchange body for heat exchange, enters the second splitting element 702, enters the third heat exchange passage 400, is throttled by the throttling element 401, then enters the third splitting element 703, and flows out of the second header port 104. Therefore, the heat exchanger provided by the embodiment of the disclosure has the advantages that the number of downward heat exchange branches of the refrigeration flow is reduced when the refrigeration flow is downward, the refrigerant circulation is accelerated, the heat transfer coefficient is increased, the refrigerant can fully exchange heat with the surrounding environment, and the refrigeration efficiency of the air conditioner is improved.

Optionally, the first shunt element 701 comprises one or more flow diverters, similarly, the second shunt element 702 comprises one or more flow diverters, and the third shunt element 703 comprises one or more flow diverters. Wherein the flow divider is a flow dividing element having one or more inflow inlets and one or more outflow outlets, optionally the flow divider is cylindrical and the interior is a brass type flow divider of hollow construction.

Optionally, for further simplification of the heat exchange pipeline, in some embodiments, the first heat exchange passage 200, the second heat exchange passage 300, and the third heat exchange passage 400 are arranged in sequence from top to bottom. When the air conditioner operates in a cooling mode, the refrigerant can sequentially pass through the first heat exchange passage 200, the second heat exchange passage 300 and the third heat exchange passage 400; when the air conditioner is operated for heating, the refrigerant may pass through the first heat exchange path 200, the second heat exchange path 300, and the third heat exchange path 400, respectively.

In some embodiments, as shown in connection with fig. 6 and 7, the flow regulating element 601 includes a valve body 10 and a valve spool 30; wherein, the valve core 30 is arranged in the valve body 10; a fluid channel 31 is arranged in the valve core 30, a plurality of first throttling ports 32 communicated with the valve core 30 are formed in the plug of the valve core 30, and a second throttling port 33 communicated with the valve core 30 is formed on the side of the valve core 30 away from the plug; when the one-way valve is closed, the plug of the valve core 30 can plug the fluid inlet of the valve body 10, and the fluid inlet plugs the plurality of first throttling ports 32; when the check valve is opened, fluid flows in through the plurality of first restrictions 32 and flows out through the second restrictions 33.

When the refrigerant flows in the forward direction, the flow rate adjusting element 601 is conducted, and the fluid can flow in from the plurality of first throttling ports 32, flow into the fluid channel 31 formed in the valve core, and flow out from the second throttling port 33 to play a throttling role; when the refrigerant flows in the reverse direction, the valve element 30 may block the inlet of the fluid and simultaneously block the first orifices 32 of the fluid passage, thereby performing a shutoff function. Therefore, the energy efficiency of the heat exchange system can be improved, the complexity of the pipeline of the heat exchange system can be reduced, and the investment cost of production, inspection and other links can be reduced.

In this embodiment, the flow rate adjusting element 601 includes a tubular valve body 10, a cylindrical cavity is formed inside the valve body 10, a valve core 30 is disposed in the cavity of the valve body 10, and the valve core 30 has a first end and a second end, the first end is a plug with a conical structure, and the second end is a sliding portion.

A fluid inlet is formed in one side of the valve body 10, a fluid outlet is formed in the other side of the valve body 10, and a plug of a conical structure faces the fluid inlet; the sliding portion is slidably connected to an inner sidewall of the valve body 10, thereby moving the valve body 30.

When the refrigerant flows in the forward direction from one side of the fluid inlet, the refrigerant pushes the plug of the valve element 30, so that the refrigerant can flow in from the fluid inlet, and then the channel of the one-way valve is opened; when the refrigerant flows in from the fluid outlet, the refrigerant pushes the valve core 30, so that the plug of the valve core 30 can be inserted into the fluid inlet, and the channel of the check valve is closed.

In the present embodiment, in order to enable the flow rate adjusting element 601 to have a throttling function when conducting, a fluid channel 31 is opened inside the valve core 30, and a plurality of first throttling ports 32 communicated with the valve core 30 are formed at the plug of the valve core 30, and a second throttling port 33 communicated with the valve core 30 is formed at the side of the valve core 30 away from the plug; when the check valve is turned on, the fluid flows in and converges from the plurality of first orifices 32 and flows out from the second orifices 33; when the check valve is closed, the plug of the valve core 30 can block the fluid inlet of the valve body 10, and the fluid inlet blocks the plurality of first throttling ports 32.

In the above embodiment, since the plurality of first chokes 32 are provided on the fluid inlet side, the first chokes 32 have a plurality of setting positions.

Optionally, in some embodiments, a first plurality of orifices 32 is provided in the plug side of the valve cartridge 30. In this way, the check valve is closed so as to prevent fluid from flowing out of the plurality of first restrictions 32. The side of the fluid inlet outlet needs to be able to block off the plurality of first restrictions 32, thereby ensuring the function of the one-way valve.

Optionally, in some embodiments, a plurality of first orifices 32 are provided in the plug end face of the valve cartridge 30. In this way, the check valve is closed so as to prevent fluid from flowing out of the plurality of first restrictions 32. The edge of the fluid inlet outlet needs to be capable of plugging the plurality of first chokes 32, thereby ensuring the function of stopping the check valve.

Optionally, in some embodiments, a portion of the first restriction 32 is disposed on a plug side surface of the valve plug 30, and a portion of the first restriction 32 is disposed on a plug end surface of the valve plug 30. In this way, the check valve is closed so as to prevent fluid from flowing out of the plurality of first restrictions 32. The edge and the side of the fluid inlet outlet are required to be capable of plugging the plurality of first chokes 32, so that the function of stopping the one-way valve is ensured.

In some embodiments, the valve body 10 has a limiting structure 20 inside, and when the flow regulating element 601 is closed, the plug of the valve core 30 blocks the fluid inlet of the limiting structure 20.

Optionally, the limiting structure 20 comprises: a valve seat 21 and a valve plate 22, wherein the valve seat 21 has a fluid inlet on the side of the first orifice 32; the valve plate 22 has a fluid outlet on the side of the second orifice 33; the spool 30 is located between the valve seat 21 and the valve plate 22.

In the present embodiment, the valve seat 21 is disposed in the cavity of the valve body 10, and the valve seat 21 has a fluid inlet for the refrigerant to flow into. The valve plate 22 is disposed in the valve seat 21. Thus, the valve seat 21 and the valve plate 22 form a space for restriction. The valve core 30 is arranged in the limit space.

When the fluid is flowing in the forward direction from the one side of the valve seat 21, the fluid pushes the tapered plug of the valve element 30 to allow the fluid to flow in from the fluid inlet of the valve seat 21, so that the valve element 30 abuts against the valve plate 22, and at this time, the fluid flows in from the first orifices 32 into the fluid passage 31 and flows out from the second orifices 33; when the fluid flows in the opposite direction from the valve plate 22, the fluid pushes the valve element 30, so that the tapered plug of the valve element 30 can be inserted into the fluid inlet of the valve seat 21, thereby closing the passage of the check valve, and the side surface of the fluid inlet of the valve seat 21 also plugs the first throttling ports 32 on the side surface of the plug.

Similarly, optionally, a plurality of first orifices 32 are provided on the plug end surface of the valve core 30, and the fluid flows into the fluid channel 31 from the plurality of first orifices 32 and flows out from the second orifice 33; when the fluid flows in the opposite direction from the valve plate 22, the fluid pushes the valve element 30, so that the tapered plug of the valve element 30 can be inserted into the fluid inlet of the valve seat 21, thereby closing the passage of the check valve, and simultaneously the end surface of the fluid inlet of the valve seat 21 also plugs the first throttling ports 32 on the end surface of the plug.

In some embodiments, the valve seat 21 and the valve plate 22 enclose a fluid chamber, and the valve element 30 is disposed in the fluid chamber. The valve seat 21 and the valve plate 22 are enclosed by circular side walls to form a frame structure, and a fluid chamber is formed inside the frame structure.

In some embodiments, the heat exchanger further comprises: the heat exchanger comprises a case 800, wherein a tube plate is arranged in the case 800, and the first heat exchange path 200, the second heat exchange path 300 and the third heat exchange path 400 comprise a plurality of heat exchange tubes which are fixed in the case 800 through the tube plate.

In some embodiments, the heat exchanger further includes a confluence pipeline connected to the third shunting element 703, and when the indoor heat exchanger 40 is a heat exchanger, the gas collecting pipe 100 of the heat exchanger is communicated with the compressor 60, and the confluence pipeline is communicated with the outdoor heat exchanger 50.

In the cooling mode, when the heat exchanger is used as the indoor heat exchanger 40, the first header port 103 is a port through which the refrigerant flows out, and the second header port 104 is a port through which the refrigerant flows in; in the heating mode, when the heat exchanger is used as the interior heat exchanger 40, the first header port 103 serves as a port through which the refrigerant flows in, and the second header port 104 serves as a port through which the refrigerant flows out.

In this embodiment, the gas collecting pipe 100 of the heat exchanger is communicated with the compressor 60, and the confluence pipeline is communicated with the outdoor heat exchanger 50. Therefore, in the heating flow direction, the high-temperature refrigerant discharged from the compressor 60 enters the heat exchanger through the first main port 103 of the header 100, flows through the first heat exchange path 200, the second heat exchange path 300 of the heat exchange tube set, and the third heat exchange path 400 in this order, throttles the refrigerant, flows out of the heat exchanger, and flows into the outdoor heat exchanger 50. Thus, the circulation is accelerated by a small number of branches, the heat transfer coefficient is increased, and the heat of the high-temperature refrigerant can be greatly transferred to the indoor environment, so that the heating performance is improved

In some embodiments, the heat exchanger further includes a confluence pipeline connected to the third shunting element 703, and when the outdoor heat exchanger 50 is a heat exchanger, the gas collecting pipe 100 of the heat exchanger is communicated with the compressor 60, and the confluence pipeline is communicated with the indoor heat exchanger 40.

In the cooling mode, when the heat exchanger is used as the outdoor heat exchanger 50, the first header port 103 serves as a port through which the refrigerant flows in, and the second header port 104 serves as a port through which the refrigerant flows out; in the heating mode, when the heat exchanger is used as the exterior heat exchanger 50, the first header port 103 serves as a refrigerant outflow port, and the second header port 104 serves as a refrigerant inflow port.

In this embodiment, the header 100 of the heat exchanger is in communication with the compressor 60, and the conflux line is in communication with the indoor heat exchanger 40. Therefore, when the refrigerant flows downward, the high-temperature refrigerant discharged from the compressor 60 enters the heat exchanger from the first main port 103 of the header 100, flows through the first heat exchange path 200, the second heat exchange path 300 of the heat exchange tube set, and the third heat exchange path 400 in this order, throttles, flows out of the heat exchanger, and flows into the outdoor heat exchanger 50. Thus, the circulation is accelerated by a small number of branches, and the heat transfer coefficient is increased, so that the high-temperature refrigerant can reach a lower temperature after flowing through the outdoor heat exchanger 50, and the refrigeration performance is improved.

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 (10)

1. A heat exchanger, comprising:

a heat exchange tube set comprising a first flow dividing element (701) and a second flow dividing element (702) connected to the same heat exchange path;

a third heat exchange channel (400) having a first end connected to the second flow dividing element (702) and a second end connected to a third flow dividing element (703);

a first shunt canalisation (600) connected at a first end to the first shunt element (701) and at a second end to the third shunt element (703);

the flow rate adjusting element (601) is arranged on the first shunt pipeline (600) and is used for adjusting the flow rate of the refrigerant flowing through the first shunt pipeline (600), and the conduction direction of the flow rate adjusting element (601) is defined to flow from the second end of the first shunt pipeline (600) to the first end of the first shunt pipeline (600);

and the throttling element (401) is arranged on the third heat exchange passage (400) and is used for adjusting the flow rate of the refrigerant flowing through the third heat exchange passage (400).

2. The heat exchanger as recited in claim 1 wherein said heat exchange tube set further comprises:

a gas header (100);

a first heat exchange passage (200) having a first end connected to a first nozzle (101) of the header (100) and a second end connected to the first flow-splitting element (701);

a second heat exchange channel (300) having a first end connected to the first flow dividing element (701) and a second end connected to the second flow dividing element (702);

a second shunt pipeline (500), a first end of which is connected with the second pipe orifice (102) of the gas collecting pipe (100), and a second end of which is connected with the second shunt element (702);

and the check valve (501) is arranged on the second shunt pipeline (500), and the conduction direction of the check valve (501) is limited to be from the second end of the second shunt pipeline (500) to the first end of the second shunt pipeline (500).

3. The heat exchanger according to claim 2, wherein the first heat exchange path (200), the second heat exchange path (300) and the third heat exchange path (400) are arranged in sequence from top to bottom.

4. The heat exchanger according to claim 2 or 3, characterized in that the flow regulating element (601) comprises:

a valve body (10);

a valve element (30) arranged in the valve body (10);

a fluid channel (31) is formed in the valve core (30), a plurality of first throttling ports (32) communicated with the cut-off part of the valve core (30) are formed in the cut-off part of the valve core (30), and a second throttling port (33) communicated with the valve core (30) is formed on one side of the valve core (30) departing from the cut-off part;

when the check valve is closed, the closing part of the valve core (30) can block the fluid inlet of the valve body (10), and the fluid inlet blocks the plurality of first throttling ports (32); when the check valve is opened, fluid flows in from the first plurality of orifices (32) and flows out from the second plurality of orifices (33).

5. The heat exchanger according to claim 4, wherein the plurality of first chokes (32) are provided in a shut-off portion end surface of the valve spool (30); alternatively, the plurality of first orifices (32) are provided on a cut portion side surface of the valve body (30); or, part of the first throttling port (32) is arranged on the side surface of the stopping part of the valve core (30), and part of the first throttling port (32) is arranged on the end surface of the stopping part of the valve core (30).

6. The heat exchanger, as set forth in claim 4, characterized in that the valve body (10) has a limit structure (20) inside, the limit structure (20) comprising:

a valve seat (21) having a fluid inlet on the side of the first restriction (32);

a valve plate (22) having a fluid outlet on the side of the second orifice (33);

the valve core (30) is positioned between the valve seat (21) and the valve plate (22).

7. The heat exchanger of claim 4, further comprising:

the heat exchanger comprises a shell (800), wherein a tube plate is arranged in the shell (800), the first heat exchange passage (200), the second heat exchange passage (300) and the third heat exchange passage (400) comprise a plurality of heat exchange tubes, and the plurality of heat exchange tubes are fixed in the shell (800) through the tube plate.

8. Air conditioner comprising a refrigerant circulation circuit consisting of at least an indoor heat exchanger (40), an outdoor heat exchanger (50) and a compressor (60), characterized in that said indoor heat exchanger (40) and/or said outdoor heat exchanger (50) are/is a heat exchanger according to any one of claims 1 to 7.

9. The air conditioner according to claim 8, wherein the heat exchanger further comprises a confluence line connected to the third dividing element (703), wherein when the indoor heat exchanger (40) is the heat exchanger, a header (100) of the heat exchanger is communicated with the compressor (60), and the confluence line is communicated with the outdoor heat exchanger (50).

10. The air conditioner according to claim 8, wherein the heat exchanger further comprises a conflux line connected to the third dividing element (703), the header (100) of the heat exchanger being in communication with the compressor (60) when the outdoor heat exchanger (50) is the heat exchanger, and the conflux line being in communication with the indoor heat exchanger (40).

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