CN219550687U - Heat Exchangers and Air Conditioners - Google Patents

Abstract

The present application relates to the technical field of air conditioning, and discloses a heat exchanger comprising 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 the first bypass pipeline 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 in parallel with the first heat exchange part, and the refrigerant in the first pipe section flows into the second heat exchange part through the first conduction channel The heat exchange tube of the three-way valve; when the second conduction channel of the three-way valve is turned on, the heat exchange tube of the second heat exchange part is connected in series with the first heat exchange part, and the refrigerant in the heat exchange tube of the second heat exchange part passes through the first heat exchange tube The two conduction passages flow into the second pipe section. By controlling the conduction of the first conduction channel and the second conduction channel respectively, the whole heat exchanger has different refrigerant flow path forms, so that the heat exchanger can adapt to different operating loads. The application also discloses an air conditioner.

Description

Heat Exchangers and Air Conditioners

technical field

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

Background technique

The heat exchanger is the main component of the air conditioner, and the heat exchange efficiency of the heat exchanger directly affects the cooling performance or heating performance of the air conditioner.

Taking the outdoor heat exchanger as an example, when the air conditioner is in cooling mode, the greater the degree of subcooling of the refrigerant in the outdoor heat exchanger, the better. The longer the better.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in related technologies:

When the operating load of the air conditioner is large, the operating frequency of the compressor is high, too little refrigerant flow path will cause excessive pressure loss in the system, and the logarithmic average temperature difference will decrease, which will reduce the heat transfer and is not conducive to circulation. At this time, it is necessary to use More refrigerant flow paths to reduce pressure loss and increase heat transfer. However, when the existing air conditioner operates in cooling mode, there is only one type of refrigerant flow path in the heat exchanger, which cannot adapt to load changes.

It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the application, and therefore may include information that does not constitute prior art known to those of ordinary skill in the art.

Utility model content

In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is presented below. The summary is not intended to be an extensive overview nor to identify key/important elements or to delineate the scope of these embodiments, but rather serves as a prelude to the detailed description that follows.

Embodiments of the present disclosure provide a heat exchanger and an air conditioner to solve the technical problem in the related art that the refrigerant flow path of the heat exchanger is single and cannot adapt to load changes.

In some embodiments, the heat exchanger includes a first heat exchange part and a second heat exchange part, and further includes: a first bypass line disposed between the first heat exchange part and the second heat exchange part Between, the first bypass pipeline includes a first pipe section and a second pipe section, the first pipe section communicates with the first heat exchange part, and the second pipe section communicates with the second heat exchange part; the first one-way valve , set in the first bypass pipeline, the conduction direction of the first one-way valve is limited from the second pipe section to the first pipe section; and, a three-way valve, connected with the second heat exchange part connected, the three-way valve includes a first conduction channel and a second conduction channel, the first conduction channel is connected with the first pipe section, and the second conduction channel is connected with the second pipe section, wherein, when the When the first conduction channel is conducted, the heat exchange tube of the second heat exchange part is connected in parallel with the first heat exchange part, and the refrigerant in the first pipe 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 in series with the first heat exchange part, and the refrigerant in the heat exchange tube of the second heat exchange part flows into the first heat exchange tube through the second conduction channel Second pipe section.

In some optional embodiments, the heat exchanger further includes a first flow diversion element, disposed at the port of the first pipe section, and communicated with one end of the first heat exchange part; and, a second flow diversion element, It is arranged at the port of the second pipe section and communicates with one end of the second heat exchange part.

In some optional embodiments, the first heat exchanging part includes a first heat exchanging branch and a second heat exchanging branch arranged in parallel, and the heat exchanger further includes: a third flow splitting element, connected with the The other end of the second heat exchange part is communicated with; and, a diversion element is connected to flow the refrigerant flowing out of the first heat exchange branch and the second heat exchange branch into the third flow diversion element after confluence.

In some optional embodiments, the second heat exchange part 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 the Both ends of the fourth heat exchange branch are respectively connected to the second flow diversion element and the third flow diversion element, wherein, when the first conduction channel is turned on, the third heat exchange branch and the first heat exchange part connected in parallel, 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 from the first heat exchange part and the third branch; when the second When the conduction channel is turned on, the third heat exchange branch is connected in series with the first heat exchange part, and the third heat exchange branch is connected in parallel with the fourth heat exchange branch. After the refrigerant flows out through the first heat exchange part, respectively flow into the third heat exchange branch and the fourth heat exchange branch.

In some optional embodiments, the heat exchanger further includes a third heat exchange part, which is arranged at the lower part of the first heat exchange part and the second heat exchange part, and one end of the third heat exchange part Communicate with the second flow splitting element; the fourth flow splitting element communicates with the other end of the third heat exchange part, wherein a second bypass pipeline is provided between the third flow splitting element and the fourth flow splitting 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 as being from the fourth flow-dividing element to the third flow-dividing element.

In some optional embodiments, the heat exchanger further includes a subcooling section communicating with the main pipe of the fourth flow splitting element.

In some embodiments, the air conditioner includes 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 optional embodiments, the air conditioner further includes a controller configured to adjust the first conduction channel and the second conduction channel of the three-way valve according to the difference ΔT between the outdoor ambient temperature and the indoor ambient temperature. The conduction state of the channel.

In some optional embodiments, the controller is further configured to: when ΔT≥a, control the conduction of the first conduction channel of the three-way valve; when ΔT<b, control the three-way valve The second conduction channel of the through valve is conducted, wherein a is the first temperature preset value, b is the second temperature preset value, and a>b.

In some optional embodiments, the controller is further configured to adjust the first conduction passage and the The conducting state of the second conduction channel includes: when b≤ΔT<a, and f≥x, controlling the conduction of the first conduction channel of the three-way valve; when b≤ΔT<a, and When f<x, control the second conduction channel of the three-way valve to conduct, where x is the first frequency preset value.

The heat exchanger and air conditioner provided by the embodiments of the present disclosure can achieve the following technical effects:

In the heat exchanger provided by the embodiments of the present disclosure, a first bypass pipeline is provided between the first heat exchange part and the second heat exchange part, and the first bypass pipeline is provided with a first one-way valve and a A one-way valve is connected in parallel with a three-way valve, and the three-way valve is connected with the second heat exchange part. The three-way valve includes a first conduction channel and a second conduction channel. When the first conduction channel is conducted, the three-way valve communicates with the heat exchange tube of the second heat exchange part through the first conduction channel. At this time, The heat exchange tube of the second heat exchange part is connected in parallel with the first heat exchange part; when the second conduction channel is conducted, the three-way valve communicates with the heat exchange tube of the second heat exchange part through the second conduction channel , at this time, the heat exchange tubes of the second heat exchange part are connected in series with the first heat exchange part. In the embodiments of the present disclosure, different flow path forms for the entire 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 operating loads.

The foregoing general description and the following description are exemplary and explanatory only and are not intended to limit the application.

Description of drawings

One or more embodiments are exemplified by the corresponding drawings, and these exemplifications and drawings do not constitute a limitation to the embodiments, and elements with the same reference numerals in the drawings are shown as similar elements, The drawings are not limited to scale and in which:

Fig. 1 is a schematic structural diagram of a heat exchanger provided by an embodiment of the present disclosure;

Fig. 2 is a schematic structural diagram of another heat exchanger provided by an embodiment of the present disclosure;

Fig. 3 is a schematic structural diagram of a first bypass pipeline provided by an embodiment of the present disclosure;

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

Fig. 5 is a schematic diagram of the refrigerant flow path in which the heat exchanger provided by the embodiment of the present disclosure is used as an outdoor heat exchanger and the second conduction channel of the three-way valve is conducted under cooling conditions;

Fig. 6 is a schematic diagram of a refrigerant flow path in which the heat exchanger provided by an embodiment of the present disclosure is used as an outdoor heat exchanger under a heating condition.

Reference signs:

111: first heat exchange part; 112: second heat exchange part; 113: third heat exchange part; 114: subcooling section;

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

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

14: first bypass pipeline; 1401: first pipeline section; 1402: second pipeline section; 141: first one-way valve;

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

Detailed ways

In order to understand the characteristics and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. The attached drawings are only for reference and description, and are not intended to limit the embodiments of the present disclosure. In the following technical description, 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 simplified in order to simplify the drawings.

The terms "first", "second" and the like in the description and claims of the embodiments of the present disclosure and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It should be understood that the data so used may be interchanged under appropriate circumstances so as to facilitate the embodiments of the disclosed embodiments described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion.

In the embodiments of the present disclosure, the orientations or positional relationships indicated by the terms "upper", "lower", "inner", "middle", "outer", "front", "rear" etc. are based on the orientations or positional relationships shown in the drawings. Positional relationship. These terms are mainly used to better describe the embodiments of the present disclosure and their implementations, and are not used to limit that the indicated devices, elements or components must have a specific orientation, or be constructed and operated in a specific orientation. Moreover, some of the above terms may be used to indicate other meanings besides orientation or positional relationship, for example, the term "upper" may also be used to indicate a certain attachment relationship or connection relationship in some cases. Those skilled in the art can understand the specific meanings of these terms in the embodiments of the present disclosure according to specific situations.

In addition, the terms "setting", "connecting" and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediary, or two devices, components or Internal connectivity between components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present disclosure according to specific situations.

Unless stated otherwise, the term "plurality" means two or more.

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

The term "and/or" is an associative relationship describing objects, indicating that there can be three relationships. For example, A and/or B means: A or B, or, A and B, these three relationships.

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

The air conditioner includes an indoor unit and an outdoor unit, wherein the indoor unit is equipped with an indoor heat exchanger and an indoor fan, which can be used to perform functions such as heat exchange with the refrigerant and the indoor environment; the outdoor unit is equipped with an outdoor heat exchanger, an outdoor fan, Throttle valves, compressors, gas-liquid separators, etc., which can be used to realize functions such as heat exchange between the refrigerant and the outdoor environment, refrigerant compression, and refrigerant throttling.

Here, the indoor heat exchanger, outdoor heat exchanger, throttle valve, compressor, gas-liquid separator and other components are connected through refrigerant pipelines to jointly form a refrigerant cycle for circulating the refrigerant between the indoor and outdoor units. system; optionally, the refrigerant circulation system defines at least two refrigerant flow directions for the cooling mode or the heating mode, specifically, when the air conditioner is running in the cooling mode, the refrigerant circulation system uses the first refrigerant flow direction to deliver the refrigerant, After the refrigerant is discharged from the compressor, it flows through the outdoor heat exchanger, the throttle valve and the indoor heat exchanger in sequence, and then flows back to the compressor through the gas-liquid separator; The refrigerant flows to the conveying refrigerant. After being discharged from the compressor, the refrigerant flows through the indoor heat exchanger, throttle valve and outdoor heat exchanger in sequence, and then flows back to the compressor through the gas-liquid separator.

In the heat exchanger and the air conditioner involved in the embodiments of the present disclosure, the setting of the first bypass line and the first one-way valve enables the heat exchanger to use different numbers of flow paths under different operating loads. Refrigerant delivery is carried out so that the heat exchanger can adapt to different operating loads. Most of the embodiments provided in this application are embodiments when the heat exchanger is used as an outdoor heat exchanger.

An embodiment of the present disclosure provides a heat exchanger.

As shown in FIGS. 1 to 6 , the heat exchanger includes a first heat exchange part 111 , a second heat exchange part 112 , a first bypass line 14 , a first one-way valve 141 and a three-way valve 12 . The first bypass pipeline 14 is arranged between the first heat exchange part 111 and the second heat exchange part 112, the first bypass pipeline 14 includes a first pipe section 1401 and a second pipe section 1402, the first pipe section 1401 and the first pipe section 1401 The heat exchange part 111 is in communication, and the second pipe section 1402 is in communication with the second heat exchange part 112 . The first one-way valve 141 is disposed on the first bypass pipeline 14 , and the conduction direction of the first one-way valve 141 is limited from the second pipeline section 1402 to the first pipeline section 1401 . The three-way valve 12 communicates with the second heat exchange part 112. The three-way valve 12 includes a first conducting channel 121 and a second conducting channel 122. The first conducting channel 121 is connected to the first pipe section 1401, and the second conducting channel 122 is connected with the second pipe section 1402. Wherein, when the first conducting channel 121 is conducting, the heat exchange tube of the second heat exchanging part 112 is connected in parallel with the first heat exchanging part 111, and the refrigerant in the first pipe section 1401 flows into the second heat exchanging part 1401 through the first conducting channel 121. The heat exchange tube of the heat exchange part 112; when the second conduction channel 122 is turned on, the heat exchange tube of the second heat exchange part 112 is connected in series with the first heat exchange part 111, and the heat exchange tube of the second heat exchange part 112 The refrigerant flows into the second pipe section 1402 through the second conducting channel 122 .

As shown in Figure 2 and Figure 3, in the heat exchanger provided by the embodiment of the present disclosure, the first bypass line 14 is provided with a first one-way valve 141 and a three-way valve 12, wherein the three-way valve 12 Both ends are respectively connected to the first pipe section 1401 and the second pipe section 1402 of the first bypass pipe 14 . 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 exchange part 112 , realizing different flow path forms of the heat exchanger.

Specifically, as shown in FIG. 4 , when the first conduction channel 121 of the three-way valve 12 communicates with the second heat exchange part 112 , and the second conduction channel 122 of the three-way valve 12 does not communicate with the second heat exchange part 112 When the parts 112 are connected, the refrigerant flowing in from the refrigerant inlet of the heat exchanger passes through the first heat exchange part 111 and the second heat exchange part 112 respectively and then flows out. At this time, the first heat exchange part 111 and the second heat exchange part 112 of the heat exchanger The second heat exchange part 112 is connected in parallel, and the number of refrigerant flow paths of the heat exchanger is relatively large. As shown in FIG. 5 , when the second conduction channel 122 of the three-way valve 12 is connected with the second heat exchange part 112 and the first conduction channel 121 of the three-way valve 12 is not communicated with the second heat exchange part 112 At this time, the refrigerant flowing in from the refrigerant inlet of the heat exchanger first passes through the first heat exchange part 111 for heat exchange and flows out, and then flows into the second heat exchange part 112 of the heat exchanger for heat exchange. At this time, the first heat exchange part 112 of the heat exchanger The heat exchanging part 111 and the second heat exchanging part 112 are connected in series, and the flow rate of the refrigerant in the heat exchanger is relatively small.

In the embodiment of the present disclosure, the three-way valve 12 communicates with the second heat exchange part 112. It can be understood that when the second heat exchange part 112 includes multiple heat exchange branches, the three-way valve 12 only needs to communicate with the second heat exchange part. One of the heat exchange branches of 112 can be connected. When the three-way valve 12 is in communication with part of the heat exchange branch of the second heat exchange part 112, the heat exchange pipes of the second heat exchange part 112 are connected in parallel with the first heat exchange part 111, which can be understood as the second heat exchange part 112 Part of the heat exchange branch directly connected to the three-way valve 12 in the part 112 is connected in parallel with the first heat exchange part 111; the heat exchange tube of the second heat exchange part 112 is connected in series with the first heat exchange part 111, which can be understood as, Part of the heat exchange branch in the second heat exchange part 112 that directly communicates with the three-way valve 12 is connected in series with the first heat exchange part 111 , as shown in FIGS. 1 to 5 .

In the heat exchanger provided by the embodiments of the present disclosure, the heat exchange flow path of the entire heat exchanger can be adjusted by adjusting the on or off state of the first conduction channel 121 and the second conduction channel 122 in the three-way valve 12 The number of heat exchangers makes the flow path form of the heat exchanger suitable for different operating loads.

Optionally, as shown in FIG. 2 and FIG. 3 , the heat exchanger further includes a first flow distribution element 131 and a second flow distribution element 132 . The first flow diversion element 131 is disposed at the port of the first pipe section 1401 and communicates with one end of the first heat exchange part 111 . The second flow splitting element 132 is disposed at the port of the second pipe section 1402 and communicates with one end of the second heat exchange part 112 .

The first flow dividing element 131 is disposed at the refrigerant inlet of the heat exchanger. When the first heat exchanging part 111 includes multiple heat exchanging branches, the refrigerant flowing in from the refrigerant inlet can flow into different heat exchanging branches of the first heat exchanging part 111 respectively through the first flow dividing element 131 . The second flow diversion element 132 communicates with one end of the second heat exchange part 112. It can be understood that when the second heat exchange part 112 includes a plurality of heat exchange branches, the second flow diversion element 132 communicates with one end of the second heat exchange part 112. Part of the heat exchange branch can be connected.

The first one-way valve 141 divides the first bypass line 14 into a first pipe section 1401 and a second pipe section 1402 . That is, one end of the first pipe section 1401 is connected to the first one-way valve 141 , and the port at the other end is connected to the first flow dividing element 131 . One end of the second pipe section 1402 is connected to the first one-way valve 141 , and the port at the other end is connected to the second flow dividing element 132 .

Optionally, the first heat exchange part 111 includes a first heat exchange branch and a second heat exchange branch arranged in parallel. The heat exchanger also includes a third flow splitting element 133 and a transition flow splitting element 135 . The third flow diversion element 133 communicates with the other end of the second heat exchange part 112 , and the diversion flow element 135 is used to concatenate the refrigerant flowing out of the first heat exchange branch and the second heat exchange branch and then flow into the third flow diversion element 133 .

The inlet of the first heat exchange branch and the second heat exchange branch arranged in parallel are connected to the first flow distribution element 131 , and the outlet is connected to the transfer flow distribution element 135 . The transfer diversion element 135 concatenates the refrigerant flowing out of the first heat exchange branch and the second heat exchange branch and then flows into the third flow diversion element 133 . Moreover, the third flow diversion element 133 communicates with the other end of the second heat exchange part 112 .

Optionally, the second heat exchange part 112 includes a third heat exchange branch and a fourth heat exchange branch, and the three-way valve 12 communicates with the third heat exchange branch, and the two ends of the fourth heat exchange branch are respectively It is connected to the second shunt element 132 and the third shunt element 133 . Wherein, when the first conduction channel 121 is turned on, the third heat exchange branch is connected in parallel with the first heat exchange part 111, and the third heat exchange branch is connected in series with the fourth heat exchange branch, and the refrigerant passes through the first heat exchange part 111. A heat exchange part 111 and the third branch flow out and then flow into the fourth heat exchange branch, as shown in Figure 4; when the second conduction channel 122 is turned on, the third heat exchange branch and the first heat exchange branch The parts 111 are connected in series, and the third heat exchange branch and the fourth heat exchange branch are connected in parallel, after the refrigerant flows out of the first heat exchange part 111, it flows into the third heat exchange branch and the fourth heat exchange branch respectively, As shown in Figure 5.

Two ends of the third heat exchange branch are respectively connected to the three-way valve 12 and the third flow diversion element 133 , and two ends of the fourth heat exchange branch are respectively connected to the second flow diversion element 132 and the third flow diversion element 133 . When the first conduction channel 121 of the three-way valve 12 is turned on, the first heat exchange branch, the second heat exchange branch and the third heat exchange branch are connected in parallel, and the refrigerant flowing in from the inlet of the heat exchanger The refrigerant passes through the first heat exchange branch, the second heat exchange branch and the third heat exchange branch respectively, and then flows into the fourth heat exchange branch. When the second conduction channel 122 of the three-way valve 12 is turned on, the third heat exchange branch and the fourth heat exchange branch are connected in parallel, and the refrigerant flowing in from the refrigerant inlet of the heat exchanger passes through the first heat exchange branch respectively. After heat exchange between the branch circuit and the second heat exchange branch circuit, the flow is confluenced by the transfer diversion element 135 , then flows into the third flow diversion element 133 , and then respectively flows into the third heat exchange branch circuit and the fourth heat exchange branch circuit for heat exchange.

Optionally, as shown in FIGS. 1 and 2 , the heat exchanger further includes a third heat exchange portion 113 and a fourth flow dividing element 134 . The third heat exchange part 113 is arranged on the lower part of the first heat exchange part 111 and the second heat exchange part 112, and one end of the third heat exchange part 113 communicates with the second flow distribution element 132; the fourth flow distribution element 134 communicates with the third flow distribution element 134 The other end of the heat exchange part 113 communicates. Wherein, a second bypass line 15 is provided between the third flow splitting element 133 and the fourth flow splitting element 134, and the second bypass line 15 is provided with a second one-way valve 151, and the conduction of the second one-way valve 151 The direction is defined from the fourth flow splitting element 134 to the third flow splitting element 133 .

The heat exchanger provided by the embodiment of the present disclosure further includes a third heat exchange part 113 . When the heat exchanger is in use, the third heat exchange part 113 is located at the lower part of the first heat exchange part 111 and the second heat exchange part 112 . Optionally, the third heat exchange part 113 includes a fifth heat exchange branch, and both ends of the fifth heat exchange branch communicate with the second flow splitting element 132 and the fourth flow splitting element 134 respectively.

Optionally, the heat exchanger further includes a subcooling section 114 . The subcooling section 114 communicates with the main pipe of the fourth flow splitting element 134 .

The heat exchanger provided by the embodiment of the present disclosure further includes a subcooling section 114 , and the subcooling section 114 is arranged at the lower part of the first heat exchanging part 111 , the second heat exchanging part 112 and the third heat exchanging part 113 . The arrangement of the subcooling section 114 further improves the subcooling degree of the refrigerant in the heat exchanger.

Due to the setting of the first one-way valve 141 and the second one-way valve 151, when the air conditioner is running in cooling mode and the first conduction channel 121 of the three-way valve 12 is controlled to conduct, the refrigerant flows through the inlets of the heat exchanger respectively. Pass through the first heat exchange branch, the second heat exchange branch and the third heat exchange branch, then flow through the fourth heat exchange branch, the fifth heat exchange branch and the subcooling section 114 in sequence, and then flow out. When the second conduction passage 122 of the three-way valve 12 is controlled to conduct, the refrigerant flows through the first heat exchange branch and the second heat exchange branch through the inlet of the heat exchanger, and then flows through the third heat exchange branch respectively after converging. The heat exchange branch and the fourth heat exchange branch then flow through the fifth heat exchange branch and the subcooling section 114 in sequence.

The heat exchanger provided by the embodiments of the present disclosure has different refrigerant flow paths when the air conditioner operates in a heating mode. Specifically, after the refrigerant flows into the subcooling section 114 from a port close to the subcooling section 114, it 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 is shown in FIG. 6 .

It can be seen that the heat exchanger provided by the embodiments of the present disclosure has a better refrigerant flow path when the air conditioner operates in cooling mode and heating mode, so as to meet different operating modes of the air conditioner.

The present application also provides an air conditioner.

The air conditioner includes a refrigerant circulation circuit composed of at least 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 the aforementioned heat exchangers.

Optionally, in cooling mode and the aforementioned heat exchanger is used as an outdoor heat exchanger, the refrigerant port close to the first flow splitting element 131 is used as a port for refrigerant inflow, and the refrigerant port close to the subcooling section 114 is used as a port for refrigerant outflow; While in the heating mode and the aforementioned heat exchanger is used as an outdoor heat exchanger, the refrigerant port near the subcooling section 114 is used as a port for refrigerant inflow, and the refrigerant port near the first flow splitting element 131 is used as a port for refrigerant outflow.

The air conditioner using the heat exchanger shown in the above embodiments can transport the refrigerant in different flow directions when the air conditioner is operating in the cooling mode and heating mode, not only can the refrigerant be fully exchanged in the cooling mode to achieve "Supercooling" can also avoid the pressure loss problem caused by too long flow path in the heating mode, so as to ensure the performance requirements of the heat exchanger in different working modes at the same time.

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

When the difference ΔT between the outdoor ambient temperature and the indoor ambient temperature is large, it is considered that the operating load of the air conditioner is large or the operating frequency of the compressor is high. At this time, the flow rate of the refrigerant in the heat exchanger is large, and the pressure loss occurs The reduction of the logarithmic average temperature difference is the dominant factor on the heat transfer. At this time, the heat exchanger needs more shunt pipes to increase the heat transfer. At this time, the first conduction channel 121 of the three-way valve 12 is controlled to conduct, so that the first heat exchange part 111 and the second heat exchange part 112 of the heat exchanger are connected in parallel, and the number of refrigerant flow paths in the heat exchanger is increased. .

When the difference ΔT between the outdoor ambient temperature and the indoor ambient temperature is small, the second conduction channel 122 of the three-way valve 12 is controlled to conduct, so that the first heat exchange part 111 and the second heat exchange part 112 of the heat exchanger are Connect in series to increase the length of the refrigerant flow path in the heat exchanger.

Optionally, the controller is also configured to, when ΔT≥a, control the conduction of the first conduction channel 121 of the three-way valve 12; when ΔT<b, control the conduction of the second conduction channel 121 of the three-way valve 12 The channel 122 is turned on, wherein a is the first temperature preset value, b is the second temperature preset value, and a>b.

For example, when the air conditioner operates in cooling mode, the first temperature threshold a may be greater than or equal to a temperature value of 8°C, for example, 8°C, 10°C, 12°C, 15°C, 20°C, etc.; the second temperature threshold b may be A temperature value less than or equal to 7°C, eg, 7°C, 5°C, 4°C, etc.

Optionally, the controller is further configured to adjust the first conduction passage 121 and the second conduction passage 122 of the three-way valve 12 according to the difference ΔT between the outdoor ambient temperature and the indoor ambient temperature and the operating frequency f of the compressor. conduction state, including: when b≤ΔT<a, and f≥x, the first conduction channel 121 of the control three-way valve 12 is conducted; when b≤ΔT<a, and f<x, The second conduction channel 122 controlling the three-way valve 12 is conducted, wherein, x is the first frequency preset value.

When b≦ΔT<a, the conduction states of the first conduction passage 121 and the second conduction passage 122 of the three-way valve 12 are further controlled according to the operating frequency f of the compressor. When the operating frequency f of the compressor is greater than or equal to the first frequency preset value, it is considered that the operating frequency of the compressor is high. At this time, the flow rate of the refrigerant in the heat exchanger is relatively high, and the logarithmic average temperature difference caused by the pressure loss decreases. The influence on the heat transfer is still the dominant factor. At this time, the heat exchanger needs more shunt pipelines to increase the heat transfer. At this time, the first conduction channel 121 of the three-way valve 12 is controlled to conduct, so that the first heat exchange part 111 and the second heat exchange part 112 of the heat exchanger are connected in parallel, and the number of refrigerant flow paths in the heat exchanger is increased. . When the operating frequency f of the compressor is lower than the first frequency preset value, the second conduction channel 122 of the three-way valve 12 is controlled to conduct, so that the first heat exchange part 111 and the second heat exchange part 112 of the heat exchanger are in a state of Connect in series to increase the length of the refrigerant flow path in the heat exchanger.

The above description and drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural and other changes. The examples merely represent possible variations. Individual components and functions are optional unless explicitly required, and the order of operations may vary. Portions and features of some embodiments may be included in or substituted for those of other embodiments. 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, characterized in that it comprises a first heat exchange part and a second heat exchange part, and also includes: The first bypass pipeline is arranged between the first heat exchange part and the second heat exchange part, the first bypass pipeline includes a first pipe section and a second pipe section, and the first pipe section and the first pipe section The heat exchange part is in communication, and the second pipe section is in communication with the second heat exchange part; A first one-way valve, arranged in the first bypass pipeline, the conduction direction of the first one-way valve is limited from the second pipe section to the first pipe section; and, The three-way valve communicates with the second heat exchange part, the three-way valve includes a first conduction channel and a second conduction channel, the first conduction channel is connected with the first pipe section, and the second conduction channel The passageway is connected with the second pipe section, Wherein, when the first conduction passage is conducted, the heat exchange tube of the second heat exchange part is connected in parallel with the first heat exchange part, and the refrigerant in the first pipe section flows into the second heat exchange part through the first conduction passage. The heat exchange tubes; when the second conduction channel is turned on, the heat exchange tubes of the second heat exchange part are connected in series with the first heat exchange part, and the refrigerant in the heat exchange tubes of the second heat exchange part passes through the second conduction channel. The through channel flows into the second pipe section. 2. The heat exchanger according to claim 1, further comprising: a first flow diversion element, disposed at the port of the first pipe section, and communicated with one end of the first heat exchange part; and, The second flow splitting element is arranged at the port of the second pipe section and communicates with one end of the second heat exchange part. 3. The heat exchanger according to claim 2, wherein the first heat exchange part comprises a first heat exchange branch and a second heat exchange branch arranged in parallel, and the heat exchanger further comprises : a third flow diverting element in communication with the other end of the second heat exchange portion; and, A transfer diversion element 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 flow diversion element. 4. The heat exchanger according to claim 3, wherein the second heat exchange part comprises a third heat exchange branch and a fourth heat exchange branch, and the three-way valve is connected to the first heat exchange branch. The three heat exchange branches are connected, and the two ends of the fourth heat exchange branch are respectively connected to the second flow splitting element and the third flow splitting element. 5. The heat exchanger according to claim 3, further comprising: The third heat exchange part is arranged at the lower part of the first heat exchange part and the second heat exchange part, and one end of the third heat exchange part communicates with the second flow distribution element; The fourth flow diversion element communicates with the other end of the third heat exchange part, Wherein, a second bypass line is provided between the third flow splitting element and the fourth flow splitting element, the second bypass line is provided with a second one-way valve, and the conduction of the second one-way valve A direction is defined from the fourth flow-dividing element to the third flow-dividing element. 6. The heat exchanger according to claim 5, further comprising: The subcooling section communicates with the main pipe of the fourth flow splitting element. 7. An air conditioner, characterized in that it comprises a compressor, a four-way valve, an indoor heat exchanger and an outdoor heat exchanger, Wherein, the outdoor heat exchanger is the heat exchanger described in any one of claims 1-6. 8. The air conditioner according to claim 7, further comprising: The controller is configured to adjust the conduction states of the first conducting channel and the second conducting channel of the three-way valve according to the difference ΔT between the outdoor ambient temperature and the indoor ambient temperature. 9. The air conditioner according to claim 8, wherein the controller is further configured to: When ΔT≥a, control the conduction of the first conduction channel of the three-way valve; When ΔT<b, the second conduction channel of the three-way valve is controlled to conduct, Wherein, a is the first temperature preset value, b is the second temperature preset value, and a>b. 10. The air conditioner according to claim 9, wherein the controller is further configured to adjust the three-way connection according to the difference ΔT between the outdoor ambient temperature and the indoor ambient temperature and the operating frequency f of the compressor. The conduction status of the first conduction channel and the second conduction channel of the valve, including: When b≤ΔT<a, and f≥x, control the conduction of the first conduction channel of the three-way valve; When b≤ΔT<a, and f<x, control the conduction of the second conducting channel of the three-way valve, Wherein, x is the first frequency preset value.