CN219550687U - Heat exchanger and air conditioner - Google Patents

Abstract

The utility model relates to the technical field of air conditioners, and discloses a heat exchanger which comprises a first heat exchange part, a second heat exchange part and a first bypass pipeline. The first bypass pipeline is arranged between the first heat exchange part and the second heat exchange part, and is provided with a first one-way valve and a three-way valve. When the first conduction channel of the three-way valve is conducted, the heat exchange tube of the second heat exchange part is connected with the first heat exchange part in parallel, and the refrigerant in the first tube section flows into the heat exchange tube of the second heat exchange part through the first conduction channel; when the second conduction channel of the three-way valve is conducted, the heat exchange tube of the second heat exchange part is connected with the first heat exchange part in series, and the refrigerant in the heat exchange tube of the second heat exchange part flows into the second tube section through the second conduction channel. The first conduction channel and the second conduction channel are controlled to be conducted respectively, so that the whole heat exchanger has different refrigerant flow path modes, and the heat exchanger can adapt to different operation loads. The utility model also discloses an air conditioner.

Description

Heat exchanger and air conditioner

Technical Field

The utility model relates to the technical field of air conditioners, in particular to a heat exchanger and an air conditioner.

Background

The heat exchanger is a main component of the air conditioner, and the heat exchange efficiency of the heat exchanger directly influences the refrigerating performance or the heating performance of the air conditioner.

Taking the outdoor heat exchanger as an example, when the air conditioner is in a cooling mode, the larger the supercooling degree of the refrigerant in the outdoor heat exchanger is, the better the refrigerant flow path is, the smaller the number of the refrigerant flow paths in the outdoor heat exchanger is, and the longer the refrigerant flow path is, the better the refrigerant flow path is.

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 operation load of the air conditioner is large, the operation frequency of the compressor is high, too few refrigerant flow paths can cause the system pressure loss to be too large, the logarithmic average temperature difference is reduced, so that the heat exchange quantity is reduced, the circulation is not facilitated, and at the moment, more refrigerant flow paths are needed to be adopted to reduce the pressure loss and improve the heat exchange quantity. However, when the existing air conditioner is operated in the refrigeration mode, only one refrigerant flow passage form of the heat exchanger is adopted, and the existing air conditioner cannot adapt to the load change.

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

Disclosure of Invention

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

The embodiment of the disclosure provides a heat exchanger and an air conditioner, which are used for solving the technical problems that a refrigerant flow path of the heat exchanger in the related art is single in form and cannot adapt to load change.

In some embodiments, the heat exchanger includes a first heat exchange portion and a second heat exchange portion, further comprising: the first bypass pipeline is arranged between the first heat exchange part and the second heat exchange part, and comprises a first pipe section and a second pipe section, wherein the first pipe section is communicated with the first heat exchange part, and the second pipe section is communicated with the second heat exchange part; the first one-way valve is arranged on the first bypass pipeline, and the conducting direction of the first one-way valve is limited from the second pipe section to the first pipe section; the three-way valve is communicated with the second heat exchange part and comprises a first conduction channel and a second conduction channel, the first conduction channel is connected with the first pipe section, the second conduction channel is connected with the second pipe section, when the first conduction channel is conducted, the heat exchange pipe of the second heat exchange part is connected with the first heat exchange part in parallel, and the refrigerant in the first pipe section flows into the heat exchange pipe of the second heat exchange part through the first conduction channel; when the second conduction channel is conducted, the heat exchange tube of the second heat exchange part is connected with the first heat exchange part in series, and the refrigerant in the heat exchange tube of the second heat exchange part flows into the second tube section through the second conduction channel.

In some alternative embodiments, the heat exchanger further comprises a first flow dividing element disposed at a port of the first tube segment and in communication with one end of the first heat exchange portion; and the second flow dividing element is arranged at the port of the second pipe section and is communicated with one end of the second heat exchange part.

In some alternative embodiments, the first heat exchange portion includes a first heat exchange branch and a second heat exchange branch disposed in parallel, and the heat exchanger further includes: a third flow dividing element communicated with the other end of the second heat exchange part; and the switching flow dividing element is used for converging the refrigerants flowing out of the first heat exchange branch and the second heat exchange branch and then flowing into the third flow dividing element.

In some optional embodiments, the second heat exchange portion includes a third heat exchange branch and a fourth heat exchange branch, and the three-way valve is communicated with the third heat exchange branch, and two ends of the fourth heat exchange branch are respectively connected to the second flow dividing element and the third flow dividing element, where when the first conduction channel is conducted, the third heat exchange branch is connected with the first heat exchange portion in parallel, and the third heat exchange branch is connected with the fourth heat exchange branch in series, and the refrigerant flows into the fourth heat exchange branch after flowing out through the first heat exchange portion and the third branch; when the second conduction channel is conducted, the third heat exchange branch is connected with the first heat exchange part in series, and the third heat exchange branch is connected with the fourth heat exchange branch in parallel, and after flowing out of the first heat exchange part, the refrigerant flows into the third heat exchange branch and the fourth heat exchange branch respectively.

In some optional embodiments, the heat exchanger further comprises a third heat exchange portion disposed at lower portions of the first and second heat exchange portions, and one end of the third heat exchange portion is in communication with the second flow dividing element; and the fourth flow dividing element is communicated with the other end of the third heat exchange part, a second bypass pipeline is arranged between the third flow dividing element and the fourth flow dividing element, a second one-way valve is arranged in the second bypass pipeline, and the conduction direction of the second one-way valve is limited from the fourth flow dividing element to the third flow dividing element.

In some alternative embodiments, the heat exchanger further comprises a subcooling section in communication with the main tube of the fourth flow dividing element.

In some embodiments, the air conditioner comprises a compressor, a four-way valve, an indoor heat exchanger, and an outdoor heat exchanger, wherein the outdoor heat exchanger is the aforementioned heat exchanger.

In some alternative embodiments, the air conditioner further comprises a controller configured to adjust the conduction states of the first conduction channel and the second conduction channel of the three-way valve according to a difference Δt between the outdoor ambient temperature and the indoor ambient temperature.

In some alternative embodiments, the controller is further configured to: when DeltaT is more than or equal to a, controlling the first conduction channel of the three-way valve to be conducted; and when DeltaT < b, controlling the second conduction channel of the three-way valve to conduct, wherein a is a first temperature preset value, b is a second temperature preset value, and a is more than b.

In some alternative embodiments, the controller is further configured to adjust the conduction states of the first and second conduction channels of the three-way valve according to a difference Δt between the outdoor ambient temperature and the indoor ambient temperature and an operating frequency f of the compressor, including: when b is less than or equal to DeltaT < a, and f is more than or equal to x, controlling the first conduction channel of the three-way valve to be conducted; and when b is less than or equal to DeltaT < a and f < x, controlling the second conduction channel of the three-way valve to be conducted, wherein x is a first frequency preset value.

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

in the heat exchanger provided by the embodiment of the disclosure, a first bypass pipeline is arranged between a first heat exchange part and a second heat exchange part, the first bypass pipeline is provided with a first one-way valve and a three-way valve connected with the first one-way valve in parallel, and the three-way valve is communicated with the second heat exchange part. The three-way valve comprises a first conduction channel and a second conduction channel, when the first conduction channel is conducted, the three-way valve is communicated with the heat exchange tube of the second heat exchange part through the first conduction channel, and at the moment, the heat exchange tube of the second heat exchange part is in a parallel connection state with the first heat exchange part; when the second conduction channel is conducted, the three-way valve is communicated with the heat exchange tube of the second heat exchange part through the second conduction channel, and at the moment, the heat exchange tube of the second heat exchange part is in a serial connection state with the first heat exchange part. According to the embodiment of the disclosure, different flow forms of the whole heat exchanger can be realized by controlling the respective conduction of the first conduction channel and the second conduction channel, so that the heat exchanger can adapt to different operation loads.

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

Drawings

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

FIG. 1 is a schematic view of a heat exchanger provided in an embodiment of the present disclosure;

FIG. 2 is a schematic view of another heat exchanger provided by an embodiment of the present disclosure;

FIG. 3 is a schematic view of a first bypass line provided by an embodiment of the present disclosure;

fig. 4 is a schematic diagram of a refrigerant flow path in which a heat exchanger provided in an embodiment of the present disclosure is used as an outdoor heat exchanger and a first conduction channel of a three-way valve is conducted under a refrigeration condition;

FIG. 5 is a schematic view of a refrigerant flow path in which a heat exchanger provided in an embodiment of the present disclosure is used as an outdoor heat exchanger and a second conduction channel of a three-way valve is conducted under a refrigeration condition;

fig. 6 is a schematic view of a refrigerant flow path of the heat exchanger as an outdoor heat exchanger according to the embodiment of the present disclosure in a heating operation.

Reference numerals:

111: a first heat exchange portion; 112: a second heat exchange portion; 113: a third heat exchange portion; 114: a supercooling section;

12: a three-way valve; 121: a first conduction channel; 122: a second conduction channel;

131: a first shunt element; 132: a second shunt element; 133: a third shunt element; 134: a fourth shunt element; 135: a switching shunt element;

14: a first bypass line; 1401: a first pipe section; 1402: a second pipe section; 141: a first one-way valve;

15: a second bypass line; 151: and a second one-way valve.

Detailed Description

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

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

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

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

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

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

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

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

The 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 by matching with a refrigerant and an indoor environment; the outdoor unit is provided with an outdoor heat exchanger, an outdoor fan, a throttle valve, 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.

Here, the indoor heat exchanger, the outdoor heat exchanger, the throttle valve, the compressor, the gas-liquid separator and other parts are connected through refrigerant pipelines to jointly form a refrigerant circulating system for circulating and conveying the refrigerant between the indoor machine and the outdoor machine; optionally, the refrigerant circulation system is at least limited with two refrigerant flows respectively used for a refrigeration mode or a heating mode, specifically, when the air conditioner operates in the refrigeration mode, the refrigerant circulation system conveys the refrigerant in a first refrigerant flow direction, after being discharged from the compressor, the refrigerant sequentially flows through the outdoor heat exchanger, the throttle valve and the indoor heat exchanger, and then flows back to the compressor through the gas-liquid separator; when the air conditioner operates in a heating mode, the refrigerant circulation system conveys the refrigerant in a second refrigerant flow direction, and after the refrigerant is discharged from the compressor, the refrigerant sequentially flows through the indoor heat exchanger, the throttle valve and the outdoor heat exchanger 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 first bypass pipeline and the first one-way valve, the heat exchanger can respectively carry out refrigerant conveying with different flow path numbers under different running loads, so that the heat exchanger can adapt to different running loads. The embodiments provided by the utility model are mostly embodiments when the heat exchanger is used as an outdoor heat exchanger.

The embodiment of the disclosure provides a heat exchanger.

As shown in fig. 1 to 6, the heat exchanger includes a first heat exchanging portion 111, a second heat exchanging portion 112, a first bypass line 14, a first check valve 141, and a three-way valve 12. The first bypass line 14 is disposed between the first heat exchange portion 111 and the second heat exchange portion 112, the first bypass line 14 includes a first tube segment 1401 and a second tube segment 1402, the first tube segment 1401 is in communication with the first heat exchange portion 111, and the second tube segment 1402 is in communication with the second heat exchange portion 112. The first check valve 141 is provided in the first bypass line 14, and the direction of communication of the first check valve 141 is defined from the second pipe section 1402 to the first pipe section 1401. The three-way valve 12 is in communication with the second heat exchanging portion 112, the three-way valve 12 comprising a first conducting channel 121 and a second conducting channel 122, the first conducting channel 121 being connected to the first tube segment 1401 and the second conducting channel 122 being connected to the second tube segment 1402. When the first conduction channel 121 is conducted, the heat exchange tube of the second heat exchange portion 112 is connected in parallel with the first heat exchange portion 111, and the refrigerant in the first tube segment 1401 flows into the heat exchange tube of the second heat exchange portion 112 through the first conduction channel 121; when the second conduction channel 122 is turned on, the heat exchange tube of the second heat exchange portion 112 is connected in series with the first heat exchange portion 111, and the refrigerant in the heat exchange tube of the second heat exchange portion 112 flows into the second tube segment 1402 through the second conduction channel 122.

As shown in fig. 2 and 3, in the heat exchanger provided in the embodiment of the present disclosure, the first bypass line 14 is provided with a first check valve 141 and a three-way valve 12, wherein both ends of the three-way valve 12 are connected to a first pipe segment 1401 and a second pipe segment 1402 of the first bypass line 14, respectively. The three-way valve 12 includes a first conduction channel 121 and a second conduction channel 122 that can selectively communicate with the second heat exchanging portion 112, realizing different flow patterns of the heat exchanger.

Specifically, as shown in fig. 4, when the first conduction channel 121 of the three-way valve 12 is in communication with the second heat exchange portion 112, and the second conduction channel 122 of the three-way valve 12 is not in communication with the second heat exchange portion 112, the refrigerant flowing in from the refrigerant inlet of the heat exchanger flows out after exchanging heat respectively through the first heat exchange portion 111 and the second heat exchange portion 112, at this time, the first heat exchange portion 111 and the second heat exchange portion 112 of the heat exchanger are in a parallel connection state, and the number of refrigerant flow paths of the heat exchanger is large. As shown in fig. 5, when the second conduction channel 122 of the three-way valve 12 is connected to the second heat exchange portion 112 and the first conduction channel 121 of the three-way valve 12 is not connected to the second heat exchange portion 112, the refrigerant flowing in from the refrigerant inlet of the heat exchanger flows out through the first heat exchange portion 111 for heat exchange, and then flows into the second heat exchange portion 112 of the heat exchanger for heat exchange, at this time, the first heat exchange portion 111 and the second heat exchange portion 112 of the heat exchanger are in a serial connection state, and the number of refrigerant flows of the heat exchanger is small.

In the embodiment of the present disclosure, the three-way valve 12 is in communication with the second heat exchange portion 112, it is understood that when the second heat exchange portion 112 includes a plurality of heat exchange branches, the three-way valve 12 may be in communication with one of the heat exchange branches of the second heat exchange portion 112. When the three-way valve 12 is communicated with a part of the heat exchange branch of the second heat exchange part 112, the heat exchange tube of the second heat exchange part 112 is connected with the first heat exchange part 111 in parallel, which means that the part of the heat exchange branch of the second heat exchange part 112, which is directly communicated with the three-way valve 12, is connected with the first heat exchange part 111 in parallel; the heat exchange tube of the second heat exchange portion 112 is connected in series with the first heat exchange portion 111, and it is understood that a portion of the heat exchange branch of the second heat exchange portion 112 directly connected to the three-way valve 12 is connected in series with the first heat exchange portion 111, as shown in fig. 1 to 5.

In the heat exchanger provided by the embodiment of the present disclosure, the number of heat exchange flow paths of the whole heat exchanger may be adjusted by adjusting the on or off states of the first conduction channel 121 and the second conduction channel 122 in the three-way valve 12, so that the flow path form of the heat exchanger may be adapted to different operation loads.

Optionally, as shown in fig. 2 and 3, the heat exchanger further comprises a first flow dividing element 131 and a second flow dividing element 132. The first split member 131 is provided at a port of the first tube segment 1401 and communicates with one end of the first heat exchanging portion 111. The second flow dividing element 132 is disposed at a port of the second tube segment 1402 and communicates with an end of the second heat exchange portion 112.

The first flow dividing element 131 is disposed at the refrigerant inlet of the heat exchanger. When the first heat exchange part 111 includes a plurality of heat exchange branches, the refrigerant flowing in from the refrigerant inlet may flow into different heat exchange branches of the first heat exchange part 111 through the first diverting member 131, respectively. The second shunt element 132 is in communication with one end of the second heat exchange portion 112, and it is understood that when the second heat exchange portion 112 includes a plurality of heat exchange branches, the second shunt element 132 may be in communication with a portion of the heat exchange branches in the second heat exchange portion 112.

The first check valve 141 divides the first bypass line 14 into a first segment 1401 and a second segment 1402. That is, the first check valve 141 is connected to one end of the first pipe section 1401, and the first shunt element 131 is connected to the port of the other end. One end of the second tube section 1402 is connected to the first check valve 141 and the other end is connected to the second shunt element 132.

Optionally, the first heat exchange portion 111 includes a first heat exchange branch and a second heat exchange branch that are disposed in parallel. The heat exchanger further comprises a third diverting element 133 and a switching diverting element 135. The third diversion element 133 is communicated with the other end of the second heat exchange portion 112, and the switching diversion element 135 is used for converging the refrigerant flowing out of the first heat exchange branch and the second heat exchange branch and then flowing into the third diversion element 133.

The first heat exchange branch and the second heat exchange branch are connected in parallel, the inlet of the first heat exchange branch is connected with the first shunt element 131, and the outlet of the first heat exchange branch is connected with the switching shunt element 135. The switching and diverting element 135 merges the refrigerants flowing out of the first heat exchange branch and the second heat exchange branch and then flows into the third diverting element 133. And, the third diverting element 133 communicates with the other end of the second heat exchanging portion 112.

Optionally, the second heat exchange portion 112 includes a third heat exchange branch and a fourth heat exchange branch, and the three-way valve 12 is in communication with the third heat exchange branch, and two ends of the fourth heat exchange branch are respectively connected to the second branching element 132 and the third branching element 133. When the first conduction channel 121 is turned on, the third heat exchange branch is connected in parallel with the first heat exchange portion 111, and the third heat exchange branch is connected in series with the fourth heat exchange branch, and the refrigerant flows into the fourth heat exchange branch after flowing out through the first heat exchange portion 111 and the third branch, as shown in fig. 4; when the second conduction channel 122 is turned on, the third heat exchange branch is connected in series with the first heat exchange portion 111, and the third heat exchange branch is connected in parallel with the fourth heat exchange branch, and the refrigerant flows out through the first heat exchange portion 111 and then flows into the third heat exchange branch and the fourth heat exchange branch, respectively, as shown in fig. 5.

Two ends of the third heat exchange branch are respectively connected with the three-way valve 12 and the third diversion element 133, and two ends of the fourth heat exchange branch are respectively connected with the second diversion element 132 and the third diversion element 133. When the first conduction channel 121 of the three-way valve 12 is conducted, the first heat exchange branch, the second heat exchange branch and the third heat exchange branch are in parallel connection, and the refrigerant flowing in from the refrigerant inlet of the heat exchanger flows into the fourth heat exchange branch after exchanging heat respectively through the first heat exchange branch, the second heat exchange branch and the third heat exchange branch. When the second conduction channel 122 of the three-way valve 12 is conducted, the third heat exchange branch is in parallel connection with the fourth heat exchange branch, and the refrigerant flowing in from the refrigerant inlet of the heat exchanger flows into the third heat exchange branch and the fourth heat exchange branch for heat exchange after passing through the first heat exchange branch and the second heat exchange branch respectively, flows into the third diversion element 133 after converging through the switching diversion element 135.

Optionally, as shown in fig. 1 and 2, the heat exchanger further comprises a third heat exchanging portion 113 and a fourth flow dividing element 134. The third heat exchanging part 113 is disposed at lower portions of the first heat exchanging part 111 and the second heat exchanging part 112, and one end of the third heat exchanging part 113 communicates with the second shunt element 132; the fourth diverting element 134 communicates with the other end of the third heat exchanging portion 113. Wherein, a second bypass line 15 is arranged between the third diverting element 133 and the fourth diverting element 134, the second bypass line 15 is provided with a second one-way valve 151, and the conducting direction of the second one-way valve 151 is defined from the fourth diverting element 134 to the third diverting element 133.

The heat exchanger provided by the embodiments of the present disclosure further includes a third heat exchanging portion 113. When the heat exchanger is in use, the third heat exchange portion 113 is located at the lower portions of the first heat exchange portion 111 and the second heat exchange portion 112. Optionally, the third heat exchanging portion 113 includes a fifth heat exchanging branch, and two ends of the fifth heat exchanging branch are respectively communicated with the second flow dividing element 132 and the fourth flow dividing element 134.

Optionally, the heat exchanger further comprises a supercooling section 114. The super cooling section 114 communicates with the main pipe of the fourth flow dividing element 134.

The heat exchanger provided in the embodiment of the present disclosure further includes a supercooling section 114, and the supercooling section 114 is disposed at lower portions of the first heat exchange portion 111, the second heat exchange portion 112, and the third heat exchange portion 113. The supercooling degree of the refrigerant in the heat exchanger is further improved by the supercooling section 114.

Due to the arrangement of the first check valve 141 and the second check valve 151, when the air conditioner is in the refrigeration mode and the first conduction channel 121 of the three-way valve 12 is controlled to be conducted, the refrigerant flows through the first heat exchange branch, the second heat exchange branch and the third heat exchange branch through the inlets of the heat exchangers respectively, then flows through the fourth heat exchange branch, the fifth heat exchange branch and the supercooling section 114 in sequence, and then flows out. When the second conduction channel 122 of the three-way valve 12 is controlled to be conducted, the refrigerant flows through the first heat exchange branch and the second heat exchange branch through the inlet of the heat exchanger, flows through the third heat exchange branch and the fourth heat exchange branch after converging, and flows through the fifth heat exchange branch and the supercooling section 114 sequentially.

The heat exchanger provided by the embodiment of the disclosure has different refrigerant flow paths when the air conditioner operates in a heating mode. Specifically, after flowing into the supercooling section 114 from the port near the supercooling section 114, the refrigerant flows through the first heat exchange branch, the second heat exchange branch, the third heat exchange branch, the fourth heat exchange branch and the fifth heat exchange branch, respectively, as shown in fig. 6.

Therefore, the heat exchanger provided by the embodiment of the disclosure has a better refrigerant flow path when the air conditioner operates in a refrigerating mode and a heating mode so as to conform to different operation modes of the air conditioner.

The utility model also provides an air conditioner.

The air conditioner comprises a refrigerant circulation loop at least comprising 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.

Optionally, when the heat exchanger is in the refrigeration mode and the heat exchanger is used as an outdoor heat exchanger, the refrigerant port close to the first split element 131 is used as a port for inflow of the refrigerant, and the refrigerant port close to the supercooling section 114 is used as a port for outflow of the refrigerant; when the heat exchanger is used as an outdoor heat exchanger in the heating mode, the refrigerant port near the supercooling section 114 serves as a refrigerant inflow port, and the refrigerant port near the first bypass element 131 serves as a refrigerant outflow port.

By adopting the air conditioner of the heat exchanger shown in the embodiment, when the air conditioner operates in a refrigerating mode and a heating mode, the refrigerant can be conveyed in different flow directions, so that the refrigerant can be fully heat-exchanged to realize supercooling in the refrigerating mode, and meanwhile, the problem of pressure loss caused by overlong flow paths can be avoided in the heating mode, thereby simultaneously ensuring the performance requirements of the heat exchanger in different working modes.

Optionally, the air conditioner further comprises a controller. The controller is configured to adjust the conduction states of the first conduction channel 121 and the second conduction channel 122 of the three-way valve 12 according to a difference Δt between the outdoor ambient temperature and the indoor ambient temperature.

When the difference DeltaT between the outdoor environment temperature and the indoor environment temperature is larger, the operation load of the air conditioner is larger or the operation frequency of the compressor is higher, at the moment, the flow rate of the refrigerant in the heat exchanger is larger, the influence on the heat exchange quantity caused by the logarithmic average temperature difference reduction generated by the pressure loss occupies a dominant factor, and at the moment, the heat exchanger needs more diversion pipelines to improve the heat exchange quantity. At this time, the first conduction channel 121 of the three-way valve 12 is controlled to be conducted, so that the first heat exchange portion 111 and the second heat exchange portion 112 of the heat exchanger are connected in parallel, and the number of cooling flow paths in the heat exchanger is increased.

When the difference Δt between the outdoor ambient temperature and the indoor ambient temperature is smaller, the second conduction path 122 of the three-way valve 12 is controlled to be conducted, so that the first heat exchange portion 111 and the second heat exchange portion 112 of the heat exchanger are connected in series, and the length of the cooling flow path in the heat exchanger is increased.

Optionally, the controller is further configured to control the first conduction channel 121 of the three-way valve 12 to conduct when Δt Σta is not less than a; when Δt < b, the second conduction path 122 of the three-way valve 12 is controlled to be conducted, wherein a is a first temperature preset value, b is a second temperature preset value, and a > b.

For example, when the air conditioner is operated in a cooling mode, the first temperature threshold a may be greater than or equal to a temperature value of 8 ℃, e.g., 8 ℃, 10 ℃, 12 ℃, 15 ℃, 20 ℃, etc.; the second temperature threshold b may be a temperature value less than or equal to 7 ℃, e.g., 7 ℃, 5 ℃, 4 ℃, etc.

Optionally, the controller is further configured to adjust the conduction states of the first conduction channel 121 and the second conduction channel 122 of the three-way valve 12 according to the difference Δt between the outdoor ambient temperature and the indoor ambient temperature and the operation frequency f of the compressor, including: when b is less than or equal to DeltaT < a, and f is more than or equal to x, the first conduction channel 121 of the three-way valve 12 is controlled to be conducted; when b is less than or equal to DeltaT < a and f < x, the second conduction channel 122 of the three-way valve 12 is controlled to be conducted, wherein x is a first frequency preset value.

When b is less than or equal to DeltaT < a, the conduction states of the first conduction channel 121 and the second conduction channel 122 of the three-way valve 12 are further controlled according to the operation frequency f of the compressor. When the operating frequency f of the compressor is greater than or equal to the first frequency preset value, the operating frequency f of the compressor is considered to be higher, at this time, the flow rate of the refrigerant in the heat exchanger is larger, the influence on heat exchange quantity caused by the logarithmic average temperature difference reduction generated by pressure loss still occupies a dominant factor, and at this time, the heat exchanger needs more diversion pipelines to improve the heat exchange quantity. At this time, the first conduction channel 121 of the three-way valve 12 is controlled to be conducted, so that the first heat exchange portion 111 and the second heat exchange portion 112 of the heat exchanger are connected in parallel, and the number of cooling flow paths in the heat exchanger is increased. When the operation frequency f of the compressor is smaller than the first frequency preset value, the second conduction channel 122 of the three-way valve 12 is controlled to be conducted, so that the first heat exchange part 111 and the second heat exchange part 112 of the heat exchanger are connected in series, and the length of the cooling flow path in the heat exchanger is increased.

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

the first bypass pipeline is arranged between the first heat exchange part and the second heat exchange part, and comprises a first pipe section and a second pipe section, wherein the first pipe section is communicated with the first heat exchange part, and the second pipe section is communicated with the second heat exchange part;

the first one-way valve is arranged on the first bypass pipeline, and the conducting direction of the first one-way valve is limited from the second pipe section to the first pipe section; and, a step of, in the first embodiment,

the three-way valve is communicated with the second heat exchange part and comprises a first conduction channel and a second conduction channel, the first conduction channel is connected with the first pipe section, the second conduction channel is connected with the second pipe section,

when the first conduction channel is conducted, the heat exchange tube of the second heat exchange part is connected with the first heat exchange part in parallel, and the refrigerant in the first tube section flows into the heat exchange tube of the second heat exchange part through the first conduction channel; when the second conduction channel is conducted, the heat exchange tube of the second heat exchange part is connected with the first heat exchange part in series, and the refrigerant in the heat exchange tube of the second heat exchange part flows into the second tube section through the second conduction channel.

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

the first flow dividing element is arranged at the port of the first pipe section and is communicated with one end of the first heat exchange part; and, a step of, in the first embodiment,

the second flow dividing element is arranged at the port of the second pipe section and is communicated with one end of the second heat exchange part.

3. The heat exchanger of claim 2, wherein the first heat exchange portion includes a first heat exchange leg and a second heat exchange leg disposed in parallel, the heat exchanger further comprising:

a third flow dividing element communicated with the other end of the second heat exchange part; and, a step of, in the first embodiment,

and the switching and diverting element is used for converging the refrigerants flowing out of the first heat exchange branch and the second heat exchange branch and then flowing into the third diverting element.

4. A heat exchanger according to claim 3, wherein the second heat exchange portion includes a third heat exchange branch and a fourth heat exchange branch, and the three-way valve communicates with the third heat exchange branch, and both ends of the fourth heat exchange branch are connected to the second and third flow dividing members, respectively.

5. A heat exchanger according to claim 3, further comprising:

the third heat exchange part is arranged at the lower parts of the first heat exchange part and the second heat exchange part, and one end of the third heat exchange part is communicated with the second flow dividing element;

a fourth flow dividing element communicated with the other end of the third heat exchange part,

a second bypass pipeline is arranged between the third flow dividing element and the fourth flow dividing element, a second one-way valve is arranged in the second bypass pipeline, and the conduction direction of the second one-way valve is limited from the fourth flow dividing element to the third flow dividing element.

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

and the supercooling section is communicated with the main pipe of the fourth flow dividing element.

7. An air conditioner is characterized by comprising a compressor, a four-way valve, an indoor heat exchanger and an outdoor heat exchanger,

wherein the outdoor heat exchanger is the heat exchanger according to any one of claims 1 to 6.

8. The air conditioner as set forth in claim 7, further comprising:

and a controller configured to adjust the conduction states of the first and second conduction channels of the three-way valve according to a difference Δt between an outdoor ambient temperature and an indoor ambient temperature.

9. The air conditioner of claim 8, wherein the controller is further configured to:

when DeltaT is more than or equal to a, controlling the first conduction channel of the three-way valve to be conducted;

when DeltaT < b, the second conduction channel of the three-way valve is controlled to be conducted,

wherein a is a first temperature preset value, b is a second temperature preset value, and a is more than b.

10. The air conditioner of claim 9, wherein the controller is further configured to adjust the conduction states of the first and second conduction channels of the three-way valve according to a difference Δt between an outdoor ambient temperature and an indoor ambient temperature and an operation frequency f of the compressor, comprising:

when b is less than or equal to DeltaT < a, and f is more than or equal to x, controlling the first conduction channel of the three-way valve to be conducted;

when b is less than or equal to DeltaT < a and f < x, the second conduction channel of the three-way valve is controlled to be conducted,

wherein x is a first frequency preset value.