CN217357659U - Heat exchanger and air conditioner - Google Patents

Heat exchanger and air conditioner Download PDF

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Publication number
CN217357659U
CN217357659U CN202220252246.8U CN202220252246U CN217357659U CN 217357659 U CN217357659 U CN 217357659U CN 202220252246 U CN202220252246 U CN 202220252246U CN 217357659 U CN217357659 U CN 217357659U
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China
Prior art keywords
heat exchange
flow dividing
dividing element
heat exchanger
exchange passage
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CN202220252246.8U
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Chinese (zh)
Inventor
张心怡
王飞
李阳
许文明
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Qingdao Haier Air Conditioner Gen Corp Ltd
Qingdao Haier Air Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
Original Assignee
Qingdao Haier Air Conditioner Gen Corp Ltd
Qingdao Haier Air Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/89Arrangement or mounting of control or safety devices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63Electronic processing
    • F24F11/65Electronic processing for selecting an operating mode
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00Compression machines, plants or systems, with reversible cycle
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The application relates to the technical field of air conditioners and discloses a heat exchanger which comprises a first heat exchange passage, a second heat exchange passage, a third heat exchange passage, a fourth heat exchange passage, a fifth heat exchange passage, a sixth heat exchange passage, a seventh heat exchange passage, a first bypass pipeline, a second bypass pipeline and a third bypass pipeline. Therefore, when the heat exchanger is used as an evaporator, the heat exchanger flows through more branches, so that the pressure drop of a refrigerant circulating system is reduced; when the heat exchanger is used as a condenser, the heat exchanger flows through fewer branches, so that the circulation of a refrigerant is accelerated. Thereby realizing the variable shunting function of the heat exchanger and improving the heat exchange efficiency of the heat exchanger. The application also discloses an air conditioner.

Description

Heat exchanger and air conditioner
The priority of chinese patent application entitled "dispenser, check valve, heat exchanger, refrigeration cycle system, air conditioner," filed on 9/19/2021, application No. 202122281454.9, is hereby incorporated by reference in its entirety.
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 generally comprises a refrigerant circulation loop consisting of a compressor, an outdoor heat exchanger, a throttling device, a four-way valve and an indoor heat exchanger, and the flow direction of a refrigerant in the refrigerant circulation loop is changed by the four-way valve, so that the refrigeration function and the heating function of the air conditioner are respectively realized. When the air conditioner operates in a refrigeration mode, the outdoor heat exchanger serves as a condenser; when the air conditioner runs in a heating mode, the outdoor heat exchanger is used as an evaporator; the flow directions of the refrigerant in the outdoor heat exchanger are opposite in different modes, and the circulation paths of the refrigerant in different modes influence the refrigeration and heating performance of the outdoor heat exchanger and the air conditioner.
The prior art discloses a heat exchanger, and the heat exchanger adopts a shunt tube or a shunt to carry out shunt design, so that when the heat exchanger is used as an evaporator, a refrigerant flows through more branches, the pressure drop of a refrigerant circulating system is reduced, and the performance of the heat exchanger when the heat exchanger is used as the evaporator is improved.
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:
when the heat exchanger is used as a condenser, the flow direction of the refrigerant is changed and the refrigerant reversely flows along the flow path when the heat exchanger is used as an evaporator, namely the flow direction is opposite but the flow path is unchanged, and the refrigerant still flows through more branches, so that the requirement of quick circulation when the heat exchanger is used as a condenser is not facilitated, and the heat exchange efficiency is reduced.
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, and solves the problem how to change a circulation path when the heat exchanger is respectively used as an evaporator and a condenser so as to improve the heat exchange efficiency.
In some embodiments, the heat exchanger comprises:
a first heat exchange passage, a first end of which is communicated with the first main pipeline, and a second end of which is communicated with the first flow dividing element;
a first end of the second heat exchange passage is communicated with the second flow dividing element, and a second end of the second heat exchange passage is communicated with the third flow dividing element;
a third heat exchange path having a first end connected to the second flow dividing element and a second end connected to the third flow dividing element;
a fourth heat exchange path, a first end of which is communicated with the second flow dividing element, and a second end of which is communicated with the fourth flow dividing element; and the fourth shunt element is communicated with the second main pipeline;
a fifth heat exchange passage having a first end connected to the second flow dividing element and a second end connected to the fourth flow dividing element;
a sixth heat exchange passage having a first end connected to the second flow dividing element and a second end connected to the fourth flow dividing element;
a seventh heat exchange passage having a first end connected to the second flow dividing element and a second end connected to the fourth flow dividing element;
a first bypass line, a first end of which is communicated with the first flow dividing element, and a second end of which is communicated with the second flow dividing element; the first bypass line is provided with a first check valve, and a communication direction of the first check valve is defined to flow from the first shunt element to the second shunt element;
a first end of the second bypass pipeline is communicated with the first flow dividing element, and a second end of the second bypass pipeline is communicated with the third flow dividing element; the second bypass line is provided with a second one-way valve, and the conduction direction of the second one-way valve is defined to flow from the third shunting element to the first shunting element;
a third bypass line, a first end of which is communicated with the third flow dividing element and a second end of which is communicated with the fourth flow dividing element; the third bypass line is provided with a third check valve, the direction of conduction of which is defined as flowing from the third shunt element to the fourth shunt element.
Optionally, a liquid storage amount of the distribution cavity of the second flow dividing element is greater than liquid storage amounts of the distribution cavities of the first flow dividing element, the third flow dividing element and the fourth flow dividing element, so that the second flow dividing element stores part of the refrigerant when the refrigerant enters the heat exchanger from the second main pipeline.
Optionally, the first heat exchange passage, the second heat exchange passage, the third heat exchange passage, the fourth heat exchange passage, the fifth heat exchange passage, the sixth heat exchange passage and the seventh heat exchange passage respectively include a plurality of heat exchange tubes.
Optionally, the plurality of heat exchange tubes of the first heat exchange passage form a U-shaped refrigerant flow path with an upward opening or a downward opening.
Optionally, the plurality of heat exchange tubes of the second heat exchange passage form a U-shaped refrigerant flow path with an upward opening or a downward opening.
Optionally, the plurality of heat exchange tubes of the third heat exchange passage form a U-shaped refrigerant flow path with an upward opening or a downward opening.
Optionally, a plurality of heat exchange tubes of the fourth heat exchange path form a U-shaped refrigerant flow path with an upward opening or a downward opening.
Optionally, the plurality of heat exchange tubes of the fifth heat exchange passage form a U-shaped refrigerant circulation path with an upward opening or a downward opening; and/or the presence of a gas in the atmosphere,
the plurality of heat exchange tubes of the sixth heat exchange passage form a U-shaped refrigerant circulation path with an upward opening or a downward opening; and/or the presence of a gas in the gas,
and the plurality of heat exchange tubes of the seventh heat exchange passage form a U-shaped refrigerant circulation path with an upward opening or a downward opening.
In some embodiments, the air conditioner includes the heat exchanger of any of the above embodiments.
The heat exchanger and the air conditioner provided by the embodiment of the disclosure can realize the following technical effects:
when the heat exchanger is used as an evaporator, the refrigerant enters the heat exchanger from the first main pipeline, and flows through the first heat exchange passage to the seventh heat exchange passage, the first bypass pipeline and the third bypass pipeline; when the heat exchanger is used as a condenser, the refrigerant enters the heat exchanger from the second main pipeline, and flows through the first heat exchange passage, the seventh heat exchange passage and the second bypass pipeline. Therefore, the heat exchanger flows through more branches when serving as an evaporator, so that the pressure drop of a refrigerant circulating system is reduced; when the condenser is used, the refrigerant flows through fewer branches, so that the circulation of the refrigerant is accelerated. Thereby realizing the variable shunting function of the heat exchanger and improving the heat exchange efficiency of the 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 schematic structural diagram of a heat exchanger provided by an embodiment of the present disclosure;
fig. 2 is a schematic diagram of a refrigerant flow path when the heat exchanger provided by the embodiment of the disclosure is used as an evaporator;
fig. 3 is a schematic diagram of a refrigerant flow path when the heat exchanger provided by the embodiment of the disclosure is used as a condenser;
fig. 4 is a schematic diagram illustrating a refrigerant flow path formed by a plurality of heat pipes of the heat exchanger according to the embodiment of the present disclosure;
fig. 5 is a schematic diagram illustrating a refrigerant flow path formed by a plurality of heat pipes of the heat exchanger according to the embodiment of the present disclosure;
fig. 6 is a schematic diagram illustrating a refrigerant flow path formed by a plurality of heat pipes of the heat exchanger according to the embodiment of the present disclosure;
fig. 7 is a schematic diagram illustrating a refrigerant flow path formed by a plurality of heat pipes of the heat exchanger according to the embodiment of the disclosure;
fig. 8 is a schematic diagram illustrating a refrigerant flow path formed by a plurality of heat pipes of the heat exchanger according to the embodiment of the disclosure;
fig. 9 is a schematic view illustrating a refrigerant flow path formed by a plurality of heat pipes of the heat exchanger according to the embodiment of the present disclosure;
fig. 10 is a schematic diagram illustrating a refrigerant flow path formed by a plurality of heat pipes of the heat exchanger according to the embodiment of the present disclosure.
Reference numerals:
110: a first main pipeline; 120: a second main pipeline;
210: a first heat exchange path; 220: a second heat exchange path; 230: a third heat exchange path; 240: a fourth heat exchange path; 250: a fifth heat exchange path; 260: a sixth heat exchange path; 270: a seventh heat exchange path;
310: a first bypass line; 311: a first check valve; 320: a second bypass line; 321: a second one-way valve; 330: a third bypass line; 331: a third check valve;
410: a first shunt element; 420: a second flow dividing element; 430: a third flow dividing element; 440: a fourth shunt element.
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 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 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, 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. 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.
As shown in fig. 1 to 10, an embodiment of the present disclosure provides a heat exchanger, which includes a first heat exchange path 210, a second heat exchange path 220, a third heat exchange path 230, a fourth heat exchange path 240, a fifth heat exchange path 250, a sixth heat exchange path 260, a seventh heat exchange path 270, a first bypass pipe 310, a second bypass pipe 320, and a third bypass pipe 330. Wherein, a first end of the first heat exchange path 210 is communicated with the first main flow path 110, and a second end is communicated with the first flow dividing element 410; a first end of the second heat exchange passage 220 is communicated with the second flow dividing element 420, and a second end is communicated with the third flow dividing element 430; the first end of the third heat exchange passage 230 is communicated with the second flow dividing element 420, and the second end is communicated with the third flow dividing element 430; a first end of the fourth heat exchange passage 240 is communicated with the second flow dividing element 420, and a second end is communicated with the fourth flow dividing element 440; and, fourth flow dividing element 440 is in communication with second main conduit 120; a first end of the fifth heat exchange passage 250 is communicated with the second flow dividing element 420, and a second end is communicated with the fourth flow dividing element 440; a first end of the sixth heat exchange passage 260 is communicated with the second flow dividing element 420, and a second end is communicated with the fourth flow dividing element 440; a first end of seventh heat exchange passage 270 is communicated with second flow dividing element 420, and a second end is communicated with fourth flow dividing element 440; the first end of the first bypass line 310 is communicated with the first flow dividing element 410, and the second end is communicated with the second flow dividing element 420; the first bypass line 310 is provided with a first check valve 311, and the direction of conduction of the first check valve 311 is defined to flow from the first flow dividing element 410 to the second flow dividing element 420; the first end of the second bypass line 320 is connected to the first flow dividing element 410, and the second end is connected to the third flow dividing element 430; the second bypass line 320 is provided with a second check valve 321, the direction of conduction of the second check valve 321 being defined as flowing from the third diverting element 430 to the first diverting element 410; a first end of the third bypass line 330 is communicated with the third flow dividing element 430, and a second end is communicated with the fourth flow dividing element 440; the third bypass line 330 is provided with a third non return valve 331, the direction of conductance of the third non return valve 331 being defined from the third diverting element 430 to the fourth diverting element 440.
With the heat exchanger provided in the embodiment of the present disclosure, when the heat exchanger is used as an evaporator, the refrigerant enters the heat exchanger from the first main pipe 110, and the refrigerant of the first main pipe 110 flows to the first flow dividing element 410 through the first heat exchanging path 210, as shown in fig. 2; under the limitation of the conduction direction of the first check valve 311 and the second check valve 321, the refrigerant of the first flow dividing element 410 enters the second flow dividing element 420 through the first bypass line 310; the refrigerant of the second flow dividing element 420 is divided into six paths to flow out, one path flows to the third flow dividing element 430 through the second heat exchanging passage 220, one path flows to the third flow dividing element 430 through the third heat exchanging passage 230, one path flows to the fourth flow dividing element 440 through the fourth heat exchanging passage 240, one path flows to the fourth flow dividing element 440 through the fifth heat exchanging passage 250, one path flows to the fourth flow dividing element 440 through the sixth heat exchanging passage 260, and one path flows to the fourth flow dividing element 440 through the seventh heat exchanging passage 270; since the pressure of the refrigerant is gradually reduced along with the flow of the refrigerant, the pressure difference between the inlet and the outlet of the second check valve 321 is smaller than the conduction pressure difference, and therefore the refrigerant is in a cut-off state, and the refrigerant of the third shunting element 430 enters the fourth shunting element 440 through the third bypass line 330 under the limitation of the conduction direction of the third check valve 331; finally, the refrigerant of the fourth dividing element 440 flows out of the second main pipe 120.
When the heat exchanger is used as a condenser, the refrigerant enters the heat exchanger from the second main pipeline 120, and the refrigerant of the second main pipeline 120 enters the fourth shunting element 440, as shown in fig. 3; under the limitation of the conduction direction of the third check valve 331, the refrigerant of the fourth flow dividing element 440 is divided into four paths to flow out, one path flows to the second flow dividing element 420 through the fourth heat exchange path 240, one path flows to the second flow dividing element 420 through the fifth heat exchange path 250, one path flows to the second flow dividing element 420 through the sixth heat exchange path 260, and one path flows to the second flow dividing element 420 through the seventh heat exchange path 270; under the limitation of the conduction direction of the first check valve 311, the refrigerant of the second flow dividing element 420 is divided into two paths to flow out, one path flows to the third flow dividing element 430 through the second heat exchange path 220, and the other path flows to the third flow dividing element 430 through the third heat exchange path 230; since the pressure of the refrigerant is gradually reduced along with the flow of the refrigerant, the pressure difference between the inlet and the outlet of the third check valve 331 is smaller than the conduction pressure difference, so that the refrigerant is in a cut-off state, and the refrigerant of the third shunting element 430 flows to the first shunting element 410 through the second bypass line 320 under the limitation of the conduction direction of the second check valve 321; finally, the refrigerant of the first flow dividing element 410 flows out of the first main pipeline 110 through the first heat exchanging channel 210.
In summary, when the heat exchanger is used as an evaporator, the refrigerant flows through the first to seventh heat exchange passages 210 to 270, the first bypass passage 310 and the third bypass passage 330; when the heat exchanger is used as a condenser, the refrigerant flows through the first to seventh heat exchange paths 210 to 270 and the second bypass line 320. Therefore, the heat exchanger as an evaporator flows through more branches, so that the pressure drop of a refrigerant circulating system is reduced; when the condenser is used, the refrigerant flows through fewer branches, so that the circulation of the refrigerant is accelerated. Thereby realizing the variable shunting function of the heat exchanger and improving the heat exchange efficiency of the heat exchanger.
Optionally, the liquid reservoir of the distribution chamber of the second splitter component 420 is larger than the liquid reservoirs of the distribution chambers of the first splitter component 410, the third splitter component 430 and the fourth splitter component 440. Because four paths of refrigerants enter the second flow dividing element 420, and two paths of refrigerants flow out of the second flow dividing element 420, the second flow dividing element 420 needs to adopt a distribution cavity with larger liquid storage capacity relative to other flow dividing elements, so that the requirement of uniformly dividing a plurality of branches can be met, and the function of storing partial refrigerants is achieved. Because the refrigerant needed by the heat exchanger as a condenser is less than the refrigerant needed by the heat exchanger as an evaporator, when the refrigerant enters the heat exchanger from the second main pipeline 120, the distribution cavity of the second flow dividing element 420 stores part of the refrigerant, the refrigerant participating in circulation in the refrigerant circulation system is reduced, the power of the heat exchanger is reduced, and energy conservation is realized.
Optionally, the first bypass pipeline 310 is disposed below the second flow dividing element 420, and when the refrigerant enters the heat exchanger from the second main pipeline 120, the refrigerant of the second flow dividing element 420 flows to the first bypass pipeline 310 under the action of gravity. And a part of the refrigerant is stored in a pipe section of the first bypass line 310 between the second diverging element 420 and the first check valve 311, as defined by the direction of conduction of the first check valve 311. Therefore, the refrigerant participating in the circulation in the refrigerant circulation system is reduced, the power of the heat exchanger is reduced, and the energy conservation is realized.
Optionally, the first flow dividing element 410, the second flow dividing element 420, the third flow dividing element 430 and the fourth flow dividing element 440 are respectively a refrigerant distributor. The second flow dividing element 420 has a distribution chamber with a larger liquid storage capacity relative to the other flow dividing elements, so that the plurality of branches of the second flow dividing element 420 are evenly divided.
Alternatively, the first heat exchange path 210, the second heat exchange path 220, the third heat exchange path 230, the fourth heat exchange path 240, the fifth heat exchange path 250, the sixth heat exchange path 260, and the seventh heat exchange path 270 respectively include a plurality of heat exchange tubes.
Optionally, the first heat exchange passage 210, the second heat exchange passage 220, the third heat exchange passage 230, the fourth heat exchange passage 240, the fifth heat exchange passage 250, the sixth heat exchange passage 260, and the seventh heat exchange passage 270 are sequentially arranged from bottom to top.
Optionally, the heat exchanger further includes a casing, a tube sheet is disposed in the casing, and heat exchange tubes included in the first heat exchange path 210, the second heat exchange path 220, the third heat exchange path 230, the fourth heat exchange path 240, the fifth heat exchange path 250, the sixth heat exchange path 260, and the seventh heat exchange path 270 are fixed in the casing from bottom to top through the tube sheet.
Optionally, the heat exchange tubes contained in the first heat exchange path 210, the second heat exchange path 220, the third heat exchange path 230, the fourth heat exchange path 240, the fifth heat exchange path 250, the sixth heat exchange path 260 and the seventh heat exchange path 270 are all provided with fins. Therefore, the heat exchange area of the heat exchange tube is increased through the fins, and the heat exchange efficiency of the heat exchanger is improved.
Alternatively, the plurality of heat exchange tubes of the first heat exchange path 210 constitute a U-shaped refrigerant flow path with an upward opening or a downward opening.
Illustratively, as shown in fig. 4, the first heat exchange path 210 is a U-shaped refrigerant flow path with an upward opening formed by 4 heat exchange tubes. The number of the heat exchange tubes on the left side of the first heat exchange passage 210 is 2, and the front ends of the adjacent heat exchange tubes are communicated through hairpin tubes; the number of the heat exchange tubes on the right side of the first heat exchange passage 210 is 2, and the front ends of the adjacent heat exchange tubes are communicated through hairpin tubes; the rear end of the first heat exchange tube at the lower part of the left side of the first heat exchange passage 210 is communicated with the rear end of the first heat exchange tube at the lower part of the right side through a hairpin tube; the first heat exchange path 210 has a rear end of the left upper first heat exchange tube communicated with the first flow dividing element 410, and a rear end of the right lower first heat exchange tube communicated with the first main pipe 110. The heat exchange tubes form a U-shaped refrigerant circulation path with an upward opening.
Optionally, the plurality of heat exchange tubes of the second heat exchange path 220 form a U-shaped refrigerant flow path with an upward opening or a downward opening.
Illustratively, as shown in fig. 5 and 6, the second heat exchange path 220 is a U-shaped refrigerant flow path with an upward opening formed by 6 heat exchange tubes. The number of the heat exchange tubes on the left side of the second heat exchange passage 220 is 2, and the front ends of the adjacent heat exchange tubes are communicated through hairpin tubes; the number of the heat exchange tubes on the right side of the second heat exchange passage 220 is 4, and the front ends of the adjacent heat exchange tubes are communicated through hairpin tubes; the rear end of the first heat exchange tube at the lower part of the left side of the second heat exchange passage 220 is communicated with the rear end of the first heat exchange tube at the lower part of the right side through a hairpin tube; the rear end of the left upper first heat exchange tube of the second heat exchange path 220 communicates with the third flow dividing element 430, and the rear end of the right upper first heat exchange tube communicates with the second flow dividing element 420. Thus, the plurality of heat exchange tubes form a U-shaped refrigerant circulation path with an upward opening.
As shown in fig. 7, 8 and 9, the second heat exchange path 220 is a U-shaped refrigerant flow path with an upward opening formed by 8 heat exchange tubes. Wherein, the number of the heat exchange tubes at the left side of the second heat exchange path 220 is 4, and the number of the heat exchange tubes at the right side is 4. The communication relationship of the heat exchange tube and the flow dividing element in this example is the same as that in the above example.
As shown in fig. 10, the second heat exchange path 220 is a U-shaped refrigerant flow path with an upward opening formed by 10 heat exchange tubes. Wherein, the number of the heat exchange tubes at the left side of the second heat exchange path 220 is 4, and the number of the heat exchange tubes at the right side is 6. The communication relationship of the heat exchange tube and the flow dividing element in this example is the same as that in the above example.
Optionally, the plurality of heat exchange tubes of the fourth heat exchange path 240 form a U-shaped refrigerant flow path with an upward opening or a downward opening. The number of heat exchange tubes of the fourth heat exchange passage 240 may be 6, 8 or 10.
Optionally, the plurality of heat exchange tubes of the fifth heat exchange path 250 form a U-shaped refrigerant flow path with an upward opening or a downward opening. The number of heat exchange tubes of the fifth heat exchange passage 250 may be 6, 8 or 10.
Alternatively, the plurality of heat exchange tubes of the sixth heat exchange path 260 constitute a U-shaped refrigerant flow path opening upward or opening downward. The number of the heat exchange tubes of the sixth heat exchange path 260 may be 6, 8 or 10.
Optionally, the plurality of heat exchange tubes of the seventh heat exchange path 270 form a U-shaped refrigerant flow path with an upward opening or a downward opening. The number of heat exchange tubes of the seventh heat exchange passage 270 may be 6, 8 or 10.
The numbers and the communication relations of the heat exchange tubes on the left and right sides of the U-shaped refrigerant flow paths of the third heat exchange path 230 to the seventh heat exchange path 270 are shown in fig. 4 to 10, and are not described again.
The embodiment of the present disclosure provides an air conditioner, including the heat exchanger described in any of the above embodiments. The refrigerant circulation loop of the air conditioner is at least composed of an indoor heat exchanger, an outdoor heat exchanger, a compressor and a four-way valve, wherein the indoor heat exchanger and/or the outdoor heat exchanger are/is the heat exchanger with the variable flow dividing function described in any embodiment.
Optionally, the outdoor heat exchanger of the air conditioner is the heat exchanger with the variable flow dividing function. When the air conditioner operates in a heating mode, the outdoor heat exchanger serves as an evaporator. The indoor heat exchanger is communicated with an exhaust port of the compressor through the four-way valve, and a refrigerant discharged by the compressor enters the outdoor heat exchanger through the indoor heat exchanger through the first main pipeline 110; the second main line 120 is connected to a return air port of the compressor through a four-way valve, and the refrigerant of the outdoor heat exchanger returns to the compressor through the second main line 120 to be compressed again. At the moment, the refrigerant flows through a plurality of branches in the outdoor heat exchanger, so that the pressure drop of a refrigerant circulating system is reduced, and the low-temperature heating capacity of the air conditioner is improved.
When the air conditioner operates in a cooling mode, the outdoor heat exchanger serves as a condenser, and the second main line 120 of the outdoor heat exchanger is connected to the discharge port of the compressor through the four-way valve. The refrigerant enters the outdoor heat exchanger from the second main pipeline 120, and flows through fewer branches in the outdoor heat exchanger, so that the circulation of the refrigerant is accelerated, and the high-temperature refrigerating capacity of the air conditioner is improved. Moreover, the second flow dividing element 420 and the pipe sections of the first bypass pipeline 310 between the second flow dividing element 420 and the first check valve 311 both play a role in storing the refrigerant, thereby reducing the amount of refrigerant participating in circulation in the refrigerant circulation system, reducing the power of the air conditioner and realizing energy conservation.
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 first heat exchange path (210) having a first end connected to the first main line (110) and a second end connected to the first flow dividing element (410);
a second heat exchange passage (220) having a first end connected to the second flow dividing element (420) and a second end connected to the third flow dividing element (430);
a third heat exchange passage (230) having a first end connected to the second flow dividing element (420) and a second end connected to the third flow dividing element (430);
a fourth heat exchange channel (240) having a first end connected to said second flow dividing element (420) and a second end connected to a fourth flow dividing element (440); and said fourth shunt element (440) is in communication with a second main line (120);
a fifth heat exchange channel (250) having a first end connected to said second flow dividing element (420) and a second end connected to said fourth flow dividing element (440);
a sixth heat exchange passage (260) having a first end communicating with the second flow dividing element (420) and a second end communicating with the fourth flow dividing element (440);
a seventh heat exchange passage (270) having a first end communicating with the second flow dividing element (420) and a second end communicating with the fourth flow dividing element (440);
a first bypass line (310) having a first end in communication with the first flow dividing element (410) and a second end in communication with the second flow dividing element (420); -the first bypass line (310) is provided with a first one-way valve (311), the first one-way valve (311) being defined in a conducting direction from the first flow dividing element (410) to the second flow dividing element (420);
a second bypass line (320) having a first end connected to the first shunt element (410) and a second end connected to the third shunt element (430); -the second bypass line (320) is provided with a second one-way valve (321), the direction of conduction of the second one-way valve (321) being defined from the third flow dividing element (430) to the first flow dividing element (410);
a third bypass line (330) having a first end connected to the third flow dividing element (430) and a second end connected to the fourth flow dividing element (440); the third bypass line (330) is provided with a third non return valve (331), the direction of conductance of the third non return valve (331) being defined from the third flow dividing element (430) to the fourth flow dividing element (440).
2. The heat exchanger of claim 1,
the liquid storage amount of the distribution cavity of the second flow dividing element (420) is larger than the liquid storage amounts of the distribution cavities of the first flow dividing element (410), the third flow dividing element (430) and the fourth flow dividing element (440), so that the second flow dividing element (420) stores part of the refrigerant when the refrigerant enters the heat exchanger from the second main pipeline (120).
3. The heat exchanger according to claim 1 or 2,
the first heat exchange passage (210), the second heat exchange passage (220), the third heat exchange passage (230), the fourth heat exchange passage (240), the fifth heat exchange passage (250), the sixth heat exchange passage (260), and the seventh heat exchange passage (270) respectively include a plurality of heat exchange tubes.
4. The heat exchanger of claim 3,
the plurality of heat exchange tubes of the first heat exchange passage (210) form a U-shaped refrigerant flow path with an upward opening or a downward opening.
5. The heat exchanger of claim 3,
the plurality of heat exchange tubes of the second heat exchange passage (220) form a U-shaped refrigerant circulation path with an upward opening or a downward opening.
6. The heat exchanger of claim 3,
the plurality of heat exchange tubes of the third heat exchange passage (230) form a U-shaped refrigerant circulation path with an upward opening or a downward opening.
7. The heat exchanger of claim 3,
the plurality of heat exchange tubes of the fourth heat exchange passage (240) form a U-shaped refrigerant circulation path with an upward opening or a downward opening.
8. The heat exchanger of claim 3,
and the plurality of heat exchange tubes of the fifth heat exchange passage (250) form a U-shaped refrigerant circulation path with an upward opening or a downward opening.
9. The heat exchanger of claim 3,
the plurality of heat exchange tubes of the sixth heat exchange passage (260) form a U-shaped refrigerant circulation path with an upward opening or a downward opening; and/or the presence of a gas in the gas,
and a plurality of heat exchange tubes of the seventh heat exchange passage (270) form a U-shaped refrigerant flow path with an upward opening or a downward opening.
10. An air conditioner characterized by comprising the heat exchanger according to any one of claims 1 to 9.
CN202220252246.8U 2021-09-19 2022-02-07 Heat exchanger and air conditioner Active CN217357659U (en)

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