CN114543402A - Heat exchanger, heat exchanger flow path control method, readable storage medium, and air conditioner - Google Patents

Abstract

The invention discloses a heat exchanger, a heat exchanger flow path control method, a readable storage medium and an air conditioner. The heat exchanger comprises a liquid collecting pipe, a gas collecting pipe, a first heat exchange pipe set and a second heat exchange pipe set; two ends of the first heat exchange tube set are respectively communicated with the liquid collecting tube and the gas collecting tube through a first pipeline and a third pipeline; two ends of the second heat exchange tube set are respectively communicated with the liquid collecting tube and the gas collecting tube through a second pipeline and a fourth pipeline; the first pipeline is provided with a first control valve, and the fourth pipeline is provided with a second control valve; the first end of the third control valve is connected with one end of the first control valve far away from the liquid collecting pipe, and the second end of the third control valve is connected with one end of the second control valve far away from the gas collecting pipe. The technical scheme of the invention can switch different numbers of heat exchange flow paths between different operation modes.

Description

Heat exchanger, heat exchanger flow path control method, readable storage medium, and air conditioner

technical field

The invention relates to the technical field of household appliances, in particular to a heat exchanger, a method for controlling a flow path of the heat exchanger, a readable storage medium and an air conditioner using the heat exchanger.

Background technique

For the existing heat pump air conditioner heat exchanger, the flow path of the heat exchanger is the same under various operating states of cooling, heating, different operating frequencies, and a large number of studies have shown that cooling, heating and different frequencies The optimal flow paths for indoor and outdoor heat exchangers are different. When the heat exchanger is used as a condenser, the pressure loss is small. At this time, we need to use a smaller number of branches to increase the flow rate of the refrigerant and increase the heat transfer coefficient; when the heat exchanger is used as an evaporator, the unit operates at medium and high frequency. Compared with the influence of flow velocity on the heat transfer coefficient, the reduction of the logarithmic average temperature difference caused by the pressure loss is the dominant factor. At this time, we need to use more branches to increase the heat transfer. As a result, for the same heat exchanger, it is impossible to change the heat exchanger flow path according to the actual operating conditions.

In the prior art, the heat exchanger of the air conditioner also has the ability to change the flow path in the evaporation/condensation mode, but the existing heat exchanger has strong specificity and low modularity, so it is difficult to adapt to the large-capacity air conditioner with a large heat exchange area; the flow path When changing, it is limited to adding or reducing several flow paths, and there are few ways of changing; when adding multiple changes to the flow path, more valves need to be added, the control is complicated, and the cost is high.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to propose a heat exchanger, which aims to improve the problem that more valves need to be added to change various flow paths.

In order to achieve the above purpose, the heat exchanger proposed by the present invention includes a liquid collecting pipe, a gas collecting pipe, a first heat exchange pipe group, a second heat exchange pipe group and a control valve assembly; both ends of the first heat exchange pipe group The liquid collecting pipe and the gas collecting pipe are respectively connected through the first pipeline and the third pipeline; the two ends of the second heat exchange tube group are respectively connected with the liquid collecting pipe through the second pipeline and the fourth pipeline pipe and the gas collecting pipe; the control valve assembly includes a first control valve, a second control valve and a third control valve; the first control valve is provided in the first pipeline, and the second control valve is provided with in the fourth pipeline; the third control valve has a first end and a second end that communicate with each other, the first end is connected to the end of the first control valve away from the liquid collecting pipe, the first end The two ends are connected to one end of the second control valve away from the gas collecting pipe.

Optionally, the first control valve is a first one-way valve, and the conduction direction of the first one-way valve is the direction from the liquid header to the first heat exchange tube group; and/or , the second control valve is a second one-way valve, and the conduction direction of the second one-way valve is the direction from the second heat exchange tube group to the gas collecting pipe.

Optionally, each of the first heat exchange tube group and the second heat exchange tube group is provided with at least two, at least two of the first heat exchange tube groups are arranged in parallel, and at least two of the second heat exchange tube groups are arranged in parallel. Heat pipe groups are installed in parallel.

Optionally, the third control valve is provided with one, and one end of each first heat exchange tube group close to the liquid collecting pipe is communicated with the first end of the third control valve; One end of the second heat exchange tube group close to the gas collecting pipe is communicated with the second end of the third control valve; or, the third control valve is provided with at least two, and the third control valve has at least two The first end is connected to one end of the first heat exchange tube group close to the liquid collecting pipe, and the second end of each third control valve is connected to the second heat exchange pipe group close to the gas collecting pipe. one end.

Optionally, the numbers of the first heat exchange tube group and the second heat exchange tube group are equal.

The present invention also proposes a method for controlling the flow path of the heat exchanger based on the above, comprising:

obtaining the operating mode of the heat exchanger;

According to the obtained operation mode of the heat exchanger, the opening and closing states of the first control valve and the second control valve are controlled to be the same, and the opening and closing states of the third control valve and the first control valve are controlled to be opposite. .

Optionally, the step of acquiring the operation mode of the heat exchanger includes:

Get the flow direction of the refrigerant;

According to the flow direction of the refrigerant, the operating state of the heat exchanger is determined.

Optionally, when the flow direction of the refrigerant is from the liquid header to the gas header, it is determined that the heat exchanger is in the evaporation operation mode, and the first control valve and the first control valve are controlled. The second control valve is turned on, and controls the third control valve to close;

When it is obtained that the flow direction of the refrigerant is the direction from the gas header to the liquid header, it is determined that the heat exchanger is in the condensing operation mode, and the first control valve and the second control valve are controlled to close , and control the third control valve to open.

Optionally, the heat exchanger is applied in an air conditioner, the air conditioner further includes a four-way valve, the four-way valve is connected to the heat exchanger, and the method for controlling the flow path of the heat exchanger further includes:

Obtain the state of the four-way valve;

When it is acquired that the four-way valve is in the first state, a first signal is sent to the heat exchanger to control the conduction of the first control valve and the second control valve, and control the third control valve closure;

When it is acquired that the four-way valve is in the second state, a second signal is sent to the heat exchanger, the first control valve and the second control valve are controlled to be closed, and the third control valve is controlled on.

The present invention also provides a readable storage medium, where a flow path control program of a heat exchanger is stored on the readable storage medium, and the above-mentioned heat exchanger is realized when the flow path control program of the heat exchanger is executed by a processor The steps of the flow control method.

The present invention also provides an air conditioner, including the above heat exchanger.

Optionally, the air conditioner includes an outdoor unit, and the heat exchanger is provided in the outdoor unit.

The technical solution of the present invention is that when the heat exchanger is used as an evaporator, the liquid phase-change working medium enters from the liquid collecting pipe; by turning on the first control valve, the phase-changing working medium flowing out from the liquid collecting pipe simultaneously flows along the first pipeline. and the second pipeline flow to the first heat exchange tube group and the second heat exchange tube group respectively, and after the heat exchange of the first heat exchange tube group, a gaseous phase change working medium is formed and then flows to the third pipeline, and passes through the second heat exchange tube group. The gaseous phase-change working medium formed after the heat exchange of the heat pipe group then flows to the fourth pipeline. By turning on the second control valve, the phase-change working medium can flow out from both the third pipeline and the fourth pipeline and join together. In this state, the number of flow paths of the phase change working medium is the sum of the first heat exchange tube group and the second heat exchange tube group, that is, the number of flow paths is large, thereby improving the exchange rate in the evaporation mode. heat to achieve better heat exchange effect. When the heat exchanger is used as a condenser, the gaseous phase-change working medium enters from the gas collecting pipe; by turning on the third control valve and closing the first control valve and the second control valve, the first heat exchange tube group is exchanged with the second control valve. The heat pipe groups are connected in series, and the phase-change working medium flowing out from the gas collecting pipe flows to the liquid collecting pipe after heat exchange through the first heat exchange pipe group and the second heat exchange pipe group, thereby reducing the number of flow paths and improving the phase change in the condensing mode. The flow rate of the working medium is changed, thereby increasing the heat transfer coefficient, and also achieving a better heat transfer effect.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained according to the structures shown in these drawings without creative efforts.

Fig. 1 is the structural representation that the first heat exchanger and the second heat exchanger in the heat exchanger of the present invention are both single-row heat exchangers;

Fig. 2 is the structural representation when the heat exchanger of the present invention is used as an evaporator;

Fig. 3 is the structural representation when the heat exchanger of the present invention is used as a condenser;

4 is a schematic structural diagram when only one third control valve is provided in the heat exchanger of the present invention;

FIG. 5 is a schematic structural diagram of the heat exchanger of the present invention added with a subcooled heat exchange tube group and a common heat exchange tube group.

Description of reference numbers:

label name label name 100 Collector 200 Gas collector 300 The first heat exchange tube group 400 The second heat exchange tube group 510 first control valve 520 second control valve 530 third control valve 610 first pipeline 620 second pipeline 630 third pipeline 640 Fourth pipeline 700 Subcooling heat exchange tube group 800 Commonly used heat exchange tube group

The realization, functional characteristics and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that if there are directional indications (such as up, down, left, right, front, back, etc.) involved in the embodiments of the present invention, the directional indications are only used to explain a certain posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly.

In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for the purpose of description, and should not be construed as indicating or implying Its relative importance or implicitly indicates the number of technical features indicated. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In addition, the technical solutions between the various embodiments can be combined with each other, but must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of such technical solutions does not exist. , is not within the scope of protection required by the present invention.

The present invention provides a heat exchanger.

In the embodiment of the present invention, as shown in FIGS. 2 and 3 , the heat exchanger includes a liquid header 100 , a gas header 200 , a first heat exchange tube group 300 , a second heat exchange tube group 400 , and a control valve assembly ; The two ends of the first heat exchange tube group 300 are respectively connected to the liquid collecting pipe 100 and the gas collecting pipe 200 through the first pipeline 610 and the third pipeline 630; the two ends of the second heat exchange tube group 400 respectively pass through the second pipeline 620 and the fourth pipeline 640 communicate with the liquid collecting pipe 100 and the gas collecting pipe 200; the control valve assembly includes a first control valve 510, a second control valve 520 and a third control valve 530; the first control valve 510 is provided in the first control valve 510. Pipeline 610, the second control valve 520 is arranged in the fourth pipeline 640; the third control valve 530 has a first end and a second end that communicate with each other, and the first end is connected to the end of the first control valve 510 away from the header 100 , the second end is connected to the end of the second control valve 520 away from the gas collecting pipe 200 .

In the technical solution of the present invention, when the heater module is in different operating states, switching effects of different numbers of flow paths can be achieved. It can be understood that when the heat exchanger is used as an evaporator, compared with the effect of the flow rate on the heat transfer coefficient, the reduction of the logarithmic average temperature difference caused by the pressure loss dominates the effect on the heat transfer. At this time, we hope to use More flow paths increase heat exchange. Specifically, when the heat exchanger is used as an evaporator, both the first control valve 510 and the second control valve 520 are turned on, the third control valve 530 is turned off, and both ends of the first heat exchange tube group 300 pass through the first control valve 510 and the second control valve 520 respectively. A pipeline 610 and a third pipeline 630 are connected to the liquid collector 100 and the gas collector 200, and both ends of the second heat exchange tube group 400 are respectively connected to the liquid collector 100 and the collector through the second pipeline 620 and the fourth pipeline 640. gas pipe 200, the phase change working medium entering from the liquid collecting pipe 100 will firstly be divided into two paths to flow, one of which will flow through the first pipeline 610 (including the first control valve 510), the first heat exchange The tube group 300; the other one will flow through the second pipeline 620 and the second heat exchange tube group 400. Next, a gaseous state is formed through simultaneous heat exchange in the first heat exchange tube group 300 and the second heat exchange tube group 400 , and is jointly merged into the gas collecting pipe 200 through the third pipeline 630 and the fourth pipeline 640 respectively. Therefore, when the heat exchanger is used as an evaporator, and the numbers of the first heat exchange tube group 300 and the second heat exchange tube group 400 are defined as A and B, respectively, the phase change working medium can flow through (A+B) at the same time. flow path.

When the heat exchanger is used as a condenser, the influence of the flow rate of the phase change working medium on the heat transfer is the dominant factor. At this time, we hope to increase the heat transfer coefficient by using fewer flow paths. Specifically, when the heat exchanger is used as a condenser, by closing the first control valve 510 and the second control valve 520, the high-temperature and high-pressure gaseous phase-change working medium entering from the gas collecting pipe 200 will only pass through the third pipe The passage 630 flows into the first heat exchange tube group 300 for heat exchange, so that the phase change working medium is condensed into a liquid state. Next, since the first control valve 510 on the first pipeline 610 that communicates with the first heat exchange tube group 300 is in a cut-off state, the phase-change working medium will not flow from the first pipeline 610 into the header 100; However, by turning on the third control valve 530, the phase change working medium after heat exchange through the first heat exchange tube group 300 will enter the second heat exchange tube group 400 for heat exchange again into more liquid phase change working medium , and then flow from the second heat exchange tube group 400 to the second pipeline 620, and from the second pipeline 620 to the header 100; and from the second heat exchange tube group 400 into the third pipeline 630 and the outflow pipe in turn, Finally out of the outflow tube. Therefore, when the heat exchanger is used as a condenser, and the numbers of the first heat exchange tube group 300 and the second heat exchange tube group 400 are defined as A and B, respectively, the phase-change working medium can firstly flow through the A main heat exchanger at the same time. The hot flow path then flows through the B subcooled flow paths at the same time. It can be understood that the number of the first heat exchange tube group 300 and the number of the second heat exchange tube group 400 may be the same. When the number of the first heat exchange tube group 300 and the second heat exchange tube group 400 are the same, the technical solution of the present invention The number of heat exchange flow paths in the heat exchanger when used as an evaporator is twice the number of heat exchange flow paths when the heat exchanger is used as a condenser.

It should be noted that the flow direction of the phase-change working medium of the heat exchanger in the technical solution of the present invention may flow in the direction from the liquid header 100 to the gas header 200, or from the gas header 200 to the liquid header 100. , so the heat exchanger in the technical solution of the present invention can be adapted to an air conditioner that can have a cooling function and a heating function, for example, when the air conditioner is in a heating mode, it is used as an evaporator in an outdoor unit in the air conditioner; Or when the air conditioner is in cooling mode, it is used as a condenser in the outdoor unit of the air conditioner. The technical solution of the present invention is only by adding three control valves to the heat exchanger, so as to realize the circulation of the phase-change working medium with different numbers of flow paths in different operation modes, and by turning on and off the three valves The control of the heat exchanger can realize that there are more flow paths in the operating state when the heat exchanger is used as an evaporator, thereby increasing the heat exchange and improving the heat exchange effect in the evaporation state; and when the heat exchanger is used as a condenser. It has the effect of fewer flow paths in the state, thereby increasing the flow rate of the phase change working medium and improving the heat exchange effect in the condensing state. In this way, the heat exchanger can adapt to different operating states, and has better heat exchange effect under different operating states.

In addition, the first heat exchange tube group 300 and the second heat exchange tube group 400 in the heat exchanger in the technical solution of the present invention can be modularized, that is, when a large load mode with a large heat exchange area is required, the The number of the first heat exchange tube group 300 and/or the second heat exchange tube group 400 is increased in parallel, and the effect of having different heat exchange flow paths in different operating modes can be achieved without additionally adding other control valve groups Therefore, the heat exchanger in the technical solution of the present invention has strong modularity and versatility, can adapt to various operating states, and can flexibly add the first heat exchange tube group 300 and/or the second heat exchange tube group 400 quantity. And the technical solution of the present invention can control any number of the first heat exchange tube group 300 and the second heat exchange tube group 400 only by setting three control valves, and can realize that any number of heat exchange tubes can be increased by these three control valves. number of heat exchange flow paths or to reduce the effect of any number of heat exchange flow paths.

In the technical solution of the present invention, when the heat exchanger is used as an evaporator, the liquid phase-change working medium enters from the liquid header 100; by turning on the first control valve 510, the phase-change working medium flowing out from the liquid header 100 simultaneously flows along the first control valve 510. A pipeline 610 and a second pipeline 620 flow to the first heat exchange tube group 300 and the second heat exchange tube group 400 respectively, and after heat exchange by the first heat exchange tube group 300, a gaseous phase change working medium is formed and then flows to the first heat exchange tube group 300. In the third pipeline 630 , the gaseous phase-change working medium is formed after heat exchange by the second heat exchange tube group 400 and then flows to the fourth pipeline 640 , and the second control valve 520 is turned on, so that the phase-change working medium can be transferred from the third pipeline Both the channel 630 and the fourth pipeline 640 flow out and merge together into the gas header 200; in this state, the number of flow channels for the phase change working medium is the sum of the first heat exchange tube group 300 and the second heat exchange tube group 400 , that is, the number of flow paths is large, thereby improving the heat exchange in the evaporation mode and achieving a better heat exchange effect. When the heat exchanger is used as a condenser, the gaseous phase-change working medium enters from the gas header 200; by turning on the third control valve 530 and closing the first control valve 510 and the second control valve 520, the first heat exchange tube group 300 is connected in series with the second heat exchange tube group 400, and the phase-change working medium flowing out from the gas collector 200 flows to the liquid collector 100 after heat exchange through the first heat exchange tube group 300 and the second heat exchange tube group 400, so that in the condensation mode The number of flow paths is reduced, the flow rate of the phase change working medium is increased, and the heat transfer coefficient is increased, and a better heat transfer effect is also achieved.

Further, as shown in FIG. 1 , FIG. 2 , FIG. 3 , FIG. 4 or FIG. 5 , the first control valve 510 is a first one-way valve, and the conduction direction of the first one-way valve is from the liquid collecting pipe 100 to the first one-way valve. and/or, the second control valve 520 is a second one-way valve, and the conduction direction of the second one-way valve is the direction from the second heat exchange tube group 400 to the gas collecting pipe 200 .

It can be understood that the one-way valve can only conduct conduction in one direction of the flow path, and cannot conduct conduction in the other direction opposite to this direction, so by setting the first control valve 510 as a one-way valve, it can be The procedure of disposing another control unit to control the opening and closing of the first control valve 510 is omitted. Specifically, the conduction direction of the first one-way valve is limited so that the phase change working medium flows from the liquid collecting pipe 100 to the gas collecting pipe 200 , but cannot make the phase changing working medium flow from the gas collecting pipe 200 to the liquid collecting pipe 100 . Similarly, the conduction direction of the second one-way valve is also limited so that the phase change working medium flows from the liquid collecting pipe 100 to the gas collecting pipe 200 , but cannot make the phase changing working medium flow from the gas collecting pipe 200 to the liquid collecting pipe 100 . In the following, the first control valve 510 is still set in the first pipeline 610 and the second control valve 520 is set in the fourth pipeline 640 as an example. With this arrangement, when the heat exchanger is used as an evaporator, the first control valve 520 can be set in the first pipeline. The first one-way valve on the pipeline 610 allows the phase-change working medium to flow on the first pipeline 610 , and the second one-way valve arranged on the fourth pipeline 640 also allows the phase-change working medium to flow in the fourth pipeline 640 flow upward, so that the phase change working medium can at least have a flow path flowing out from the liquid header 100 and passing through the first pipeline 610, the first heat exchange tube group 300, the third pipeline 630 to the gas collector 200 in sequence, and from The liquid collector 100 flows out and sequentially passes through the second pipeline 620 , the second heat exchange tube group 400 , and the fourth pipeline 640 to the flow path of the gas collector 200 .

When the heat exchanger is used as a condenser, the phase-change working medium flows out from the gas collecting pipe 200, and enters the second heat exchange pipe group 400 through the third pipeline 630, the first heat exchange pipe group 300, and the third control valve 530; It can be understood that, after the phase-change working medium exchanges heat from the first heat exchange tube group 300, the pressure of the phase-change working medium after it flows out is lower than the pressure when it enters the first heat exchange tube group 300, and therefore is also lower than the pressure when it enters the first heat exchange tube group 300. The pressure at one end of the second one-way valve close to the gas collecting pipe 200, so after the second one-way valve passes through the third control valve 530, even if it enters the end of the second heat exchange tube group 400 close to the gas collecting pipe 200, it will not pass through the third control valve 530. The two one-way valves return to the gas collecting pipe 200 , but continue to exchange heat through the second heat exchange tube group 400 and enter the second pipeline 620 , and then enter the liquid collecting pipe 100 .

Of course, in other embodiments, the first control valve 510 and/or the second control valve 520 may also be a solenoid valve. When the first control valve 510 and/or the second control valve 520 are solenoid valves, the first control valve 510 and the second control valve 520 can be controlled to be in an open state when the heat exchanger is used as an evaporator. When the condenser is used, the first control valve 510 and the second control valve 520 may be controlled to be closed.

Further, as shown in FIG. 1 , FIG. 2 , FIG. 3 , FIG. 4 or FIG. 5 , the third control valve 530 is a solenoid valve.

By setting the third control valve 530 as a solenoid valve, the third control valve 530 in this embodiment is limited to be opened only when the heat exchanger is used as a condenser, and not opened when the heat exchanger is used as an evaporator. In this embodiment, when the first control valve 510 is arranged in the first pipeline 610 and the second control valve 520 is arranged in the fourth pipeline 640 , since the first end of the third control valve 530 is connected to the first control valve 510 away from the One end of the liquid header 100 and the second end are connected to the end of the second control valve 520 away from the gas header 200. When the heat exchanger is used as a condenser, the phase-change working medium flowing out from the gas header 200 will pass through the third pipeline 630. It flows to the first heat exchange tube group 300, after heat exchange through the first heat exchange tube group 300, it enters the second heat exchange tube group 400 through the third control valve 530 to continue heat exchange, and then flows into the liquid collection through the second pipeline 620 inside the tube 100.

When the first control valve 510 is arranged in the second pipeline 620 and the second control valve 520 is arranged in the third pipeline 630, since the first end of the third control valve 530 is connected to the first control valve 510 away from the header pipe 100 One end, the second end is connected to the end of the second control valve 520 away from the gas collecting pipe 200, then when the heat exchanger is used as a condenser, the phase change working medium flowing out from the gas collecting pipe 200 will flow to the second heat exchange through the fourth pipeline 640 The tube group 400, after heat exchange through the second heat exchange tube group 400, enters the first heat exchange tube group 300 through the third control valve 530 to continue heat exchange, and then flows into the header 100 through the first pipeline 610.

In this embodiment, as shown in FIG. 1 , FIG. 2 , FIG. 3 , FIG. 4 or FIG. 5 , at least two first heat exchange tube groups 300 and second heat exchange tube groups 400 are provided, and at least two first heat exchange tube groups 300 and 400 are provided. The heat exchange tube groups 300 are arranged in parallel, and at least two second heat exchange tube groups 400 are arranged in parallel.

By arranging at least two first heat exchange tube groups 300, and at least two first heat exchange tube groups 300 are arranged in parallel, the number of flow paths when the heat exchanger is used as an evaporator can be increased, and the heat exchanger can also be used as a condenser. the number of flow paths at the time. It can be understood that the number of the first heat exchange tube group 300 and the number of the second heat exchange tube group 400 may be the same or different. When the number of the first heat exchange tube group 300 and the second heat exchange tube group 400 are the same and there are N, the number of flow paths when the heat exchanger is used as an evaporator is 2N, and the flow path when the heat exchanger is used as a condenser is 2N. The number of roads is N. Wherein, N is an integer, for example, it can be 1, 2, 3, 4 or 5, etc.

As shown in FIG. 4 or FIG. 5 , based on the solution that both the first heat exchange tube group 300 and the second heat exchange tube group 400 are provided with at least two, in this embodiment, one third control valve 530 is provided, and each One end of the first heat exchange tube group 300 close to the liquid collecting pipe 100 is connected with the first end; one end of each second heat exchange pipe group 400 close to the gas collecting pipe 200 is connected with the second end.

By arranging one third control valve 530 , it is only necessary to control the opening and closing of the one third control valve 530 to control whether the first heat exchange tube group 300 and the second heat exchange tube group 400 are arranged in series or in parallel. Specifically, when the third control valve 530 is controlled to open, the modules composed of all the first heat exchange tube groups 300 arranged in parallel can be controlled to be connected in series with the modules composed of all the second heat exchange tube groups 400 arranged in parallel. At the same time, the number of flow paths of the phase change working medium is reduced, which can be used for the connection state of the heat exchanger as a condenser. When the third control valve 530 is controlled to be closed, all the first heat exchange tube groups 300 and all the second heat exchange tube groups 400 can be controlled to be connected in parallel, thereby increasing the number of flow paths of the phase change working medium, and the available In the connection state when the heat exchanger is used as an evaporator.

Of course, as shown in FIG. 1 , FIG. 2 or FIG. 3 , at least two third control valves 530 may also be provided, and each third control valve 530 is connected to a first heat exchange tube group 300 and a second heat exchange tube Between the tube groups 400, and when the heat exchanger is used as a condenser, the first heat exchange tube group 300 and the second heat exchange tube group 400 are connected in series.

When at least two third control valves 530 are provided, a first heat exchange tube group 300 and a second heat exchange tube group 400 can be used as a connection module, and each third control valve 530 can correspond to a connection module. Specifically, the first end of each third control valve 530 is connected to one end of a first heat exchange tube group 300 close to the header 100 , and the second end of each third control valve 530 is connected to a second heat exchange tube group 400 is close to one end of the gas collecting pipe 200, when each third control valve 530 is connected between the first heat exchange tube group 300 and the second heat exchange tube group 400 in each connection module, so that the heat exchanger is used for condensation When the first heat exchange tube group 300 and the second heat exchange tube group 400 are connected in series, each third control valve 530 controls a group of modules composed of the first heat exchange tube group 300 and the second heat exchange tube group 400 , so that the control of the number of flow paths in the whole heat exchanger is more flexible. For example, when the heat exchanger is used as a condenser, all the third control valves 530 can be opened. At this time, it can be ensured that each third control valve 530 can control a first heat exchange tube group 300 and a second heat exchange tube. The first heat exchange tube group 300 and the second heat exchange tube group 400 are connected in series, so that the phase change working medium flows from the first heat exchange tube group 300 to the second heat exchange tube group 400 (or The path when the second heat exchange tube group 400 flows to the first heat exchange tube group 300 is shorter, and it can also avoid the situation that the whole heat exchanger cannot work when one of the third control valves 530 is damaged. Of course, a part of the third control valve 530 can also be selected to be opened. At this time, it can be ensured that the path between the first heat exchange tube group 300 and the second heat exchange tube group 400 connected to the opened third control valve 530 is short. The first heat exchange tube group 300 and the second heat exchange tube group 400 connected by the unopened third control valve 530 need to be bypassed to the pipeline where the opened third control valve 530 is located, and the two are connected in series through this pipeline. Effect. It should be noted that, when the heat exchanger in this embodiment is used as an evaporator, and the heat exchanger is provided with at least two third control valves 530, all the third control valves 530 must be in a closed state, And the first control valve 510 and the second control valve 520 in the heat exchanger are opened.

Further, please refer to FIG. 1 to FIG. 3 , the first heat exchange tube group 300 is a double-row heat exchange tube group or a single-row heat exchange tube group; and/or, the second heat exchange tube group 400 is a double-row heat exchange tube group Tube bank or single row heat exchange tube bank. The first heat exchange tube group 300 and the second heat exchange tube group 400 in FIG. 1 are both single-row heat exchange tube groups, and the first heat exchange tube group 300 and the second heat exchange tube group in FIG. 2 400 pieces are all double-row heat exchange tube groups.

Regardless of whether the first heat exchange tube group 300 is a double-row heat exchange tube or a single-row heat exchange tube, it has two ports that communicate with each other, both of which are one port for the phase change working medium to enter from one port and from the other port. Outflow piping. It can be understood that when the first heat exchange tube group 300 is a double-row heat exchange tube, it can pass through and the two single-row heat exchange tube groups are arranged side by side and the outlet of one of the two single-sheet heat exchange tube groups It is connected with the inlet of the other one through the intermediate pipeline. Of course, the type of the second heat exchange tube group 400 may be the same as or different from that of the first heat exchange tube group 300 , and the second heat exchange tube group 400 may also be a double-row heat exchange tube group or a single-row heat exchange tube group .

Further, as shown in FIG. 5 , the heat exchanger further includes a subcooling heat exchange tube group 700 , and the subcooling heat exchange tube group 700 is connected to the header 100 and away from the first heat exchange tube group 300 and the second heat exchange tube group 400 one end.

By arranging the subcooling heat exchange tube group 700 at one end of the header 100 away from the first heat exchange tube group 300 and the second heat exchange tube group 400, when the heat exchanger in the technical solution of the present invention is used as a condenser, it can be The phase change working medium can also pass through the cold heat exchange tube group 700 for subcooling after heat exchange through the first heat exchange tube group 300 and the second heat exchange tube group 400, so that the heat exchange energy efficiency can be further improved.

Further, as shown in FIG. 5 , based on the solution in which the first control valve 510 is arranged in the first pipeline 610 and the second control valve 520 is arranged in the fourth pipeline 640 , in this embodiment, the heat exchanger also includes a common heat exchanger. As for the heat pipe group 800, one end of the heat exchange pipe group 800 is usually connected to the second pipeline 620, and the other end is connected to the third pipeline 630.

One end of the common heat exchange tube group 800 is connected to the second pipeline 620 and the other end is connected to the third pipeline 630, so that the common heat exchange tube group 800 is in a normal flow state, and the common heat exchange tube group 800 is not affected. The switching effect of the first solenoid valve, switching valve group, etc. That is to say, regardless of whether the first solenoid valve and/or the switching valve group is in an open state or a closed state, the common heat exchange tube group 800 can supply the phase-change working medium to circulate, and enable the phase-change working medium to flow from the inflow pipe to the outflow. flow in the direction of the tube.

Of course, in another embodiment, when the first control valve 510 is arranged in the second pipeline 620 and the second control valve 520 is arranged in the third pipeline 630, in this embodiment, one end of the heat exchange tube group 800 is commonly used. The first pipeline 610 is connected, and the other end is connected to the fourth pipeline 640 .

It can be understood that the common heat exchange tube group 800 may be provided with one, two or more. It is defined that the number of commonly used heat exchange tube groups 800 is M, and when the number of the first heat exchange tube group 300 and the second heat exchange tube group 400 are both N, when the heat exchanger is used as an evaporator, the phase-change working medium flows The number of heat exchange flow paths passed through is (2N+M); when the heat exchanger is used as a condenser, the number of heat exchange flow paths through which the phase change working medium flows is (N+M). The values of N and M may be the same or different, and both N and M are integers, and the values of N and M may be 1, 2, 3, 4, or 5.

The present invention also provides an air conditioner, which includes a heat exchanger. The specific structure of the heat exchanger refers to the above-mentioned embodiments. Since the air conditioner adopts all the technical solutions of all the above-mentioned embodiments, it has at least the above-mentioned embodiments. All the beneficial effects brought by the technical solution will not be repeated here.

Further, the air conditioner may be a split type air conditioner, that is, it includes an indoor unit and an outdoor unit, and the indoor unit and the outdoor unit are connected by a refrigerant pipe. Specifically, the indoor unit is provided with a first heat exchange module, the outdoor unit is provided with a second heat exchange module, and the first heat exchange module, the second heat exchange module and the compressor are connected by a refrigerant pipe to form a circulation loop. The heat exchanger in the technical solution of the present invention can be installed in the indoor unit, that is, as the first heat exchange module; or the heat exchanger in the technical solution of the present invention can also be installed in the outdoor unit, that is, as the second heat exchange module.

The present invention also provides a method for controlling the flow path of the heat exchanger using the above-mentioned method. For the specific implementation of the heat exchanger of the present invention, reference may be made to the various embodiments of the above-mentioned heat exchanger, which will not be repeated here.

The heat exchanger flow path control method includes:

Step S1: obtaining the operation mode of the heat exchanger;

Step S2: Control the opening and closing states of the first control valve 510 and the second control valve 520 to be the same according to the obtained operation mode of the heat exchanger, and control the opening and closing states of the third control valve 530 and the first control valve 510 to be opposite.

Specifically, when the first control valve 510 and the second control valve 520 can both be in an open state, that is, a conducting state, the third control valve 530 is in a closed state, that is, a cut-off state. When the first control valve 510 and the second control valve 520 can both be in the closed state, that is, the cut-off state, the third control valve 530 is in the open state, that is, the conducting state. The first control valve 510 may be a one-way valve or a two-way solenoid valve. When the first control valve 510 is a one-way valve, in order to make the heat exchanger have more heat exchange flow paths when it is used as an evaporator, and have fewer heat exchange flow paths when the heat exchanger is used as a condenser, the first control The conduction direction of the valve 510 is the direction when the liquid header 100 flows to the gas header 200 . Likewise, the second control valve 520 may be a one-way valve or a two-way solenoid valve. When the second control valve 520 is a one-way valve, in order that the heat exchanger has more heat exchange flow paths when it is used as an evaporator, and has fewer heat exchange flow paths when the heat exchanger is used as a condenser, the second single control valve 520 is a one-way valve. The conduction direction to the valve is the direction when the liquid header 100 flows to the gas header 200 .

When the first control valve 510 and the second control valve 520 are controlled to be opened at the same time, and the third control valve 530 is controlled to be closed, the phase-change working fluid can flow into the liquid header 100 and pass through the first pipeline 610 and the first control valve respectively. 510 flows into the first heat exchange tube group 300 and flows into the second heat exchange tube group 400 through the second pipeline 620 , and the phase-change working medium flowing out through the first heat exchange tube group 300 flows into the gas collector 200 through the third pipeline 630 , the phase change working medium flowing out through the second heat exchange tube group 400 flows into the gas collecting pipe 200 through the fourth pipeline 640 and the second control valve 520 . At this time, the heat exchanger can provide more heat exchange flow paths for the phase change working medium, which can be used when the heat exchanger is used as an evaporator.

When the first control valve 510 and the second control valve 520 are controlled to be closed at the same time, and the third control valve 530 is controlled to be opened, in order to enable the phase-change working medium to flow between the liquid header 100 and the gas header 200, the phase-change working medium It can flow in from the gas collecting pipe 200 , and flow into the liquid collecting pipe 100 through the third pipeline 630 , the first heat exchange tube group 300 , the third control valve 530 , the second heat exchange tube group 400 and the second pipeline 620 in sequence. At this time, the heat exchanger can only provide few heat exchange flow paths for the phase change working medium, which can be used when the heat exchanger is used as a condenser.

The heat exchanger in the present invention can achieve the effect that the number of heat exchange flow paths of the heat exchanger can be changed only by adjusting the opening and closing of the first control valve 510, the second control valve 520 and the third control valve 530, thereby The heat exchanger is made to have a number of heat exchange flow paths corresponding to its operation modes in different operation modes, so that the heat exchanger can have better heat exchange effect in different operation modes. In addition, the first heat exchange tube group 300 and the second heat exchange tube group 400 in the present invention can be modularized, so that the number of flow paths can be arbitrarily increased, and when the number of flow paths is arbitrarily increased or decreased , it can be realized without increasing the number of control valves, so that the heat exchange flow path of the heat exchanger can be changed in many ways.

In one embodiment, the step of acquiring the operation mode of the heat exchanger includes:

Get the flow direction of the refrigerant;

According to the flow direction of the refrigerant, the operating state of the heat exchanger is determined.

When the heat exchanger is used in different operating modes, the flow direction of the refrigerant in the heat exchanger is also different. By obtaining the flow direction of the refrigerant, the operating state of the heat exchanger can be indirectly determined, and then the opening of each control valve can be determined. Or the closed state has the effect of prompting the signal.

Specifically, when it is obtained that the flow direction of the refrigerant is from the liquid header 100 to the gas header 200, it is determined that the heat exchanger is in the evaporation operation mode, and the first control valve 510 and the second control valve can be controlled 520 opens at the same time, and controls the third control valve 530 to close.

In this way, the phase change working medium can flow into the liquid collecting pipe 100 , and flow into the first heat exchange tube group 300 through the first pipeline 610 and the first control valve 510 and into the second heat exchange tube through the second pipeline 620 respectively. Group 400, the phase change working medium flowing out through the first heat exchange tube group 300 flows into the gas collector 200 through the third pipeline 630, and the phase change working medium flowing out through the second heat exchange tube group 400 flows through the fourth pipeline 640 and The second control valve 520 flows into the gas collecting pipe 200 , thereby increasing the number of heat exchange flow paths to meet the requirement of increasing the heat exchange amount when it is used as an evaporator, thereby having higher heat exchange efficiency.

When it is obtained that the flow direction of the refrigerant is the direction from the gas header 200 to the liquid header 100, and it is determined that the heat exchanger is in the condenser operation mode, the first control valve 510 and the second control valve can be controlled by 520 is closed at the same time, and the third control valve 530 is controlled to be opened.

In this way, the phase change working medium can flow into the gas collecting pipe 200, and then flow into the third pipeline 630, the first heat exchange tube group 300, the third control valve 530, the second heat exchange tube group 400 and the second pipeline 620 in sequence. In the liquid collecting pipe 100, the number of heat exchange flow paths is reduced, so as to meet the requirement of a higher heat exchange coefficient when it is used as a condenser, so that it can also have a better heat exchange effect.

In another embodiment, the heat exchanger is used in an air conditioner, the air conditioner further includes a four-way valve, the four-way valve is connected to the heat exchanger, and the method for controlling the flow path of the heat exchanger further comprises: include:

Obtain the state of the four-way valve;

When it is acquired that the four-way valve is in the first state, a first signal is sent to the heat exchanger to control the first control valve 510 and the second control valve 520 to conduct, and control the third Control valve 530 is closed;

When it is acquired that the four-way valve is in the second state, a second signal is sent to the heat exchanger, the first control valve 510 and the second control valve 520 are controlled to be closed, and the third control valve 520 is controlled to be closed. The control valve 530 is opened.

In an air conditioner with both cooling and heating, there is usually a four-way valve, and in the cooling state and the heating state, the four-way valve has different states respectively. By monitoring the state of the four-way valve, it can be determined whether the air conditioner is in the cooling mode or the heating mode, and then a signal can be sent to the heat exchanger, so that the heat exchanger corresponds to the operation mode suitable for operation, that is, a signal is sent to the heat exchanger , so that it is in evaporative or condensing operating mode. In the present invention, the states of the four-way valve include a first state and a second state, the first state corresponds to the heating state of the air conditioner, and the corresponding first signal is the evaporation operation signal; the second state corresponds to the cooling state of the air conditioner, corresponding to The second signal of is the condensation running signal. Specifically, the first state and the second state may be a power-on state and a power-off state, respectively, or the first state and the second state may be a power-off state and a power-on state, respectively.

Taking the first state as the power-on state and the second state as the power-off state as an example, when it is obtained that the four-way valve is in the power-on state, the first signal is sent to the heat exchanger, that is, the evaporation operation signal is sent to the heat exchanger, and then the control is performed. The first control valve 510 and the second control valve 520 are turned on, and the third control valve 530 is controlled to be closed. At this time, the heat exchanger can have a larger number of heat exchange flow paths in the evaporation operation state, and the heat exchange The number of flow paths is the sum of the numbers of the first heat exchange tube group and the second heat exchange tube group, thereby increasing the heat exchange and improving the heat exchange effect in the evaporation state. When it is obtained that the four-way valve is in a power-off state, a second signal is sent to the heat exchanger, that is, a condensation operation signal is sent to the heat exchanger, and the first control valve 510 and the second control valve 520 are controlled to close, and the third control valve 510 and the second control valve 520 are controlled to close. The control valve 530 is opened, at this time, the heat exchanger can have a smaller number of heat exchange flow paths in the condensation operation state, and the number of heat exchange flow paths is the heat exchange flow path of the heat exchanger in the evaporation operation state Half of the number, with fewer flow paths, thereby increasing the flow rate of the phase change working medium and improving the heat transfer effect in the condensing state. .

The present invention also provides a readable storage medium on which a flow path control program of the heat exchanger is stored, and when the flow path control program of the heat exchanger is executed by a processor, the above-mentioned flow path control of the heat exchanger is realized steps of the method.

For the specific implementation of the readable storage medium of the present invention, reference may be made to the foregoing embodiments of the heat exchanger flow path control method, and details are not described herein again.

The above descriptions are only the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Under the inventive concept of the present invention, the equivalent structural transformations made by the contents of the description and drawings of the present invention, or the direct/indirect application Other related technical fields are included in the scope of patent protection of the present invention.

Claims (12)

1. A heat exchanger, comprising:

a liquid collecting pipe;

a gas collecting pipe;

the two ends of the first heat exchange tube set are respectively communicated with the liquid collecting tube and the gas collecting tube through a first pipeline and a third pipeline;

the two ends of the second heat exchange tube set are respectively communicated with the liquid collecting tube and the gas collecting tube through a second pipeline and a fourth pipeline; and

a control valve assembly including a first control valve, a second control valve, and a third control valve;

the first control valve is arranged on the first pipeline, and the second control valve is arranged on the fourth pipeline;

the third control valve is provided with a first end and a second end which are communicated with each other, the first end is connected with one end, far away from the liquid collecting pipe, of the first control valve, and the second end is connected with one end, far away from the gas collecting pipe, of the second control valve.

2. The heat exchanger as recited in claim 1 wherein said first control valve is a first check valve, a direction of conductance of said first check valve being in a direction from said header to said first heat exchange tube set;

and/or the second control valve is a second one-way valve, and the conduction direction of the second one-way valve is the direction from the second heat exchange tube set to the gas collecting pipe.

3. The heat exchanger as recited in claim 1 wherein said first heat exchange tube group and said second heat exchange tube group are each provided in at least two, at least two of said first heat exchange tube groups being arranged in parallel, and at least two of said second heat exchange tube groups being arranged in parallel.

4. The heat exchanger as claimed in claim 3, wherein there is one third control valve, and one end of each of the first heat exchange tube groups adjacent to the header pipe communicates with the first end; one end of each second heat exchange tube group close to the gas collecting tube is communicated with the second end;

or at least two third control valves are arranged, the first end of each third control valve is connected with one end, close to the liquid collecting pipe, of the first heat exchange pipe group, and the second end of each third control valve and one end, close to the gas collecting pipe, of the second heat exchange pipe group.

5. The heat exchanger as claimed in any one of claims 1 to 4, wherein the number of the first heat exchange tube sets and the second heat exchange tube sets is equal.

6. A heat exchanger flow path control method according to any one of claims 1 to 5, characterized by comprising:

acquiring an operation mode of the heat exchanger;

and controlling the opening and closing states of the first control valve and the second control valve to be the same and controlling the opening and closing states of the third control valve and the first control valve to be opposite according to the acquired operation mode of the heat exchanger.

7. The heat exchanger flow path control method as claimed in claim 6, wherein said step of obtaining an operation mode of said heat exchanger includes:

acquiring the flow direction of a refrigerant;

and judging the running state of the heat exchanger according to the flowing direction of the refrigerant.

8. The flow path control method for the heat exchanger according to claim 7, wherein when the flow direction of the obtained refrigerant flows from the header pipe to the header pipe, it is determined that the heat exchanger is in an evaporation operation mode, the first control valve and the second control valve are controlled to be opened, and the third control valve is controlled to be closed;

and when the flow direction of the obtained refrigerant flows from the gas collecting pipe to the liquid collecting pipe, judging that the heat exchanger is in a condensation operation mode, controlling the first control valve and the second control valve to be closed, and controlling the third control valve to be opened.

9. The heat exchanger flow path control method as claimed in claim 6, wherein the heat exchanger is applied to an air conditioner, the air conditioner further includes a four-way valve, the four-way valve is connected to the heat exchanger, and the heat exchanger flow path control method further includes:

acquiring the state of the four-way valve;

when the four-way valve is in a first state, sending a first signal to the heat exchanger, controlling the first control valve and the second control valve to be conducted, and controlling the third control valve to be closed;

and when the four-way valve is in a second state, sending a second signal to the heat exchanger, controlling the first control valve and the second control valve to be closed, and controlling the third control valve to be opened.

10. A readable storage medium, characterized in that the readable storage medium has stored thereon a flow path control program for a heat exchanger, which when executed by a processor, implements the steps of the heat exchanger flow path control method according to any one of claims 6 to 9.

11. An air conditioner characterized by comprising the heat exchanger according to any one of claims 1 to 5.

12. The air conditioner of claim 11, wherein the air conditioner includes an outdoor unit, and the heat exchanger is provided in the outdoor unit.

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