CN220507001U - Indoor heat exchanger, indoor unit and air conditioner - Google Patents

Abstract

The utility model relates to the technical field of air conditioning, in particular to an indoor heat exchanger, an indoor unit and an air conditioner. This application aims to solve the problem of poor heat transfer effect caused by the lack of split flow design in indoor heat exchangers. For this purpose, the indoor heat exchanger of the present application includes an inner heat exchange pipeline and an outer heat exchange pipeline that are independent of each other. The first end of the inner heat exchange pipeline is provided with a first connecting pipe. The second end of the inner row heat exchange pipe is provided with a second connecting pipe, the first end of the outer row heat exchange pipe is provided with a third connecting pipe, and the second end of the outer row heat exchange pipe is provided with a As for the fourth connecting pipe, a communication pipe is also provided between the first end of the inner row heat exchange pipe and the second end of the outer row heat exchange pipe. This application can make the indoor heat exchanger have a diverting effect, thereby improving the heat exchange effect of the indoor heat exchanger in different modes.

Description

Indoor heat exchangers, indoor units and air conditioners

Technical field

The utility model relates to the technical field of air conditioning, in particular to an indoor heat exchanger, an indoor unit and an air conditioner.

Background technique

The development of household air conditioners has entered an era of high energy efficiency, miniaturization, and low resource consumption, which requires improving heat exchanger efficiency and saving resources. When the air conditioner is cooling or heating, the functions of the indoor heat exchanger and the outdoor heat exchanger are different. Whether the indoor heat exchanger or the outdoor heat exchanger is used as a condenser and evaporator, the requirements for the form of splitting are different. The evaporator has low pressure, slow flow rate, and requires many flow paths. As a condenser, the temperature is high and the pressure is high, requiring a large heat exchange temperature difference and a large degree of subcooling.

For current air conditioners, most of the refrigerant shunt control is only adaptively designed for the outdoor heat exchanger, but there is no relevant design plan for the indoor heat exchanger. This results in the heat exchange effect of the indoor heat exchanger under different operating modes. different.

Accordingly, a new technical solution is needed in this field to solve the above problems.

Utility model content

In order to solve at least one of the above-mentioned problems in the prior art, that is, to solve the problem that the indoor heat exchanger does not have a split flow design resulting in poor heat exchange effect, the first aspect of the present application provides an indoor heat exchanger. The device includes an internal heat exchange pipeline and an external heat exchange pipeline that are independent of each other. The first end of the internal heat exchange pipeline is provided with a first connecting pipe, and the second end of the internal heat exchange pipeline is A second connecting pipe is provided, the first end of the outer row heat exchange pipe is provided with a third connecting pipe, the second end of the outer row heat exchange pipe is provided with a fourth connecting pipe, and the inner row heat exchange pipe is provided with a third connecting pipe. A communication pipe is also provided between the first end of the heat pipe and the second end of the external heat exchange pipe.

In the preferred technical solution of the above indoor heat exchanger, a first valve body is provided on the communication pipe.

In the preferred technical solution of the above indoor heat exchanger, the first valve body is a solenoid valve or an electronic expansion valve; or

The first valve body is a one-way valve, and the one-way valve is configured to conduct the refrigerant when it flows from the first end of the inner exhaust heat exchange pipeline to the second end of the outer exhaust heat exchange pipeline.

In the preferred technical solution of the above indoor heat exchanger, a second valve body is provided on the first connecting pipe.

In the preferred technical solution of the above indoor heat exchanger, the second valve body is a solenoid valve or an electronic expansion valve; or

The second valve body is a one-way valve, and the one-way valve is configured to conduct when the refrigerant flows into the first end of the inner exhaust heat exchange pipeline.

In the preferred technical solution of the above indoor heat exchanger, the inner row heat exchange pipeline includes a first internal row heat exchange pipe section and a second internal row heat exchange pipe section, and the first end of the first internal row heat exchange pipe section and the first end of the second inner row heat exchange pipe section are connected to the first connecting pipe at the same time, the second end of the first inner row heat exchange pipe section and the second end of the second inner row heat exchange pipe section end is connected to the second connecting pipe at the same time,

The outer exhaust heat exchange pipeline includes a first outer exhaust heat exchange pipe section and a second outer exhaust heat exchange pipe section. The first end of the first outer exhaust heat exchange pipe section and the third end of the second outer exhaust heat exchange pipe section One end is connected to the third connecting pipe at the same time, and the second end of the first outer row heat exchange pipe section and the second end of the second outer row heat exchange pipe section are connected to the fourth connecting pipe at the same time,

There are two connecting pipes, one of which is connected between the first end of the first inner row heat exchange pipe section and the second end of the first outer row heat exchange pipe section, and the other one is connected between the first end of the first inner row heat exchange pipe section and the second end of the first outer row heat exchange pipe section. between the first end of the second inner row heat exchange tube section and the second end of the second outer row heat exchange tube section.

In the preferred technical solution of the above indoor heat exchanger, a first three-way control valve is provided on the first connecting pipe, and the first port and the second port of the first three-way control valve are provided on the first Connecting pipe, the third port of the first three-way control valve is connected to the third connecting pipe.

In the preferred technical solution of the above indoor heat exchanger, a second three-way control valve is provided on the fourth connecting pipe, and the first port and the second port of the second three-way control valve are provided on the fourth connecting pipe. Connecting pipe, the third port of the second three-way control valve is connected to the second connecting pipe.

In a second aspect of the present application, an indoor unit is also provided. The indoor unit includes the indoor heat exchanger described in any one of the above-mentioned first aspects.

A third aspect of this application also provides an air conditioner, which includes the indoor unit of the second aspect.

The indoor heat exchanger of the present application is provided with internal heat exchange pipelines and external heat exchange pipelines that are independent of each other, and the first end of the internal heat exchange pipeline and the second end of the external heat exchange pipeline are Setting up connecting pipes between them can make the indoor heat exchanger have a diverting effect, thereby improving the heat exchange effect of the indoor heat exchanger in different modes.

Description of the drawings

The present application is described below with reference to the accompanying drawings. In the attached picture:

Figure 1 is a system diagram of the air conditioner in cooling mode according to the first embodiment of the present application;

Figure 2 is a system diagram of the air conditioner in heating mode according to the first embodiment of the present application;

Figure 3 is a system diagram of the air conditioner according to the second embodiment of the present application.

List of reference signs

1. Compressor; 2. Four-way valve; 3. Outdoor heat exchanger; 4. Throttle element; 5. Indoor heat exchanger; 51. Internal heat exchange pipe; 511. First internal heat exchange pipe section; 512. Second internal row heat exchange pipe section; 52. External row heat exchange pipe section; 521. First external row heat exchange pipe section; 522. Second external row heat exchange pipe section; 53. Connecting pipeline; 61. First connection pipe; 62, second connecting pipe; 63, third connecting pipe; 64, fourth connecting pipe; 71, first valve body; 72, second valve body; 73, first three-way control valve; 74, second Three-way control valve.

Detailed ways

Preferred embodiments of the present application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application and are not intended to limit the protection scope of the present application. For example, although the indoor heat exchanger in the accompanying drawings is introduced with an internal heat exchange pipeline and an external heat exchange pipeline as an example, this arrangement method is not set in stone, and those skilled in the art can modify it as needed. Adapt it to your specific application. For example, those skilled in the art can increase the number of internal heat exchange pipelines and/or external heat exchange pipelines.

It should be noted that in the description of this application, the terms "upper", "lower", "left", "right", etc. indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present application. Furthermore, the terms “first,” “second,” “third,” and “fourth” are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In addition, it should be noted that in the description of this application, unless otherwise clearly stated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection or a fixed connection. It is a detachable connection or an integral connection; it can be directly connected or indirectly connected through an intermediary, or it can be an internal connection between two components. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

First, the air conditioner of the present application will be described with reference to FIGS. 1 and 2 .

As shown in Figures 1 and 2, in order to solve the problem of poor heat exchange effect caused by the indoor heat exchanger not having a split flow design, this application provides an air conditioner. The air conditioner includes an indoor unit and an outdoor unit, where the outdoor unit includes a compressor 1 , four-way valve 2, outdoor heat exchanger 3 and throttling element 4. The outdoor heat exchanger 3 is equipped with an outdoor fan. The indoor unit includes an indoor heat exchanger 5, and the indoor heat exchanger 5 is equipped with an internal fan. The compressor 1, the four-way valve 2, the outdoor heat exchanger 3, the throttling element 4, and the indoor heat exchanger 5 are connected through refrigerant pipes. The above connection method is a conventional technology in this field and will not be described in detail in this application.

In particular, the indoor heat exchanger 5 of the present application includes an inner heat exchange pipe 51 and an outer heat exchange pipe 52 that are independent of each other. The first end of the inner heat exchange pipe 51 is provided with a first connecting pipe 61. A second connecting pipe 62 is provided at the second end of the inner exhaust heat exchange pipe 51 . The first end of the outer exhaust heat exchange pipeline 52 is provided with a third connecting pipe 63, the second end of the outer exhaust heat exchange pipeline 52 is provided with a fourth connecting pipe 64, and the first end of the inner exhaust heat exchange pipeline 51 is connected to the first end of the outer exhaust heat exchange pipeline 52. A communication pipe 53 is also provided between the second ends of the outer exhaust heat exchange pipe 52 .

Referring to Figure 1, in the above arrangement, when the air conditioner is in cooling operation, the refrigerant is discharged from the exhaust port of the compressor 1 and flows to the outdoor heat exchanger 3 through the four-way valve 2. In the outdoor heat exchanger 3 It exchanges heat with the outdoor air and then flows out of the outdoor heat exchanger 3. Immediately afterwards, the refrigerant flows into the throttling element 4, which throttles the refrigerant. The throttled refrigerant enters the inner row heat exchange pipe of the indoor heat exchanger 5 through the first connecting pipe 61 and the second connecting pipe 62 respectively. 51 and external exhaust heat exchange pipeline 52, and conduct heat exchange with indoor air. After heat exchange, the two refrigerants are discharged through the third connecting pipe 63 and the fourth connecting pipe 64 respectively, merge in front of the four-way valve 2 and then flow to the compressor 1 .

It should be noted that the refrigerant enters the inner heat exchange pipe 51 and the outer heat exchange pipe 52 through the first connecting pipe 61 and the second connecting pipe 62. Since the indoor heat exchanger 5 serves as an evaporator in the cooling mode, it The internal refrigerant undergoes an endothermic evaporation process, so the temperature and pressure gradually increase from the inlet to the outlet. Therefore, the refrigerant entering the internal heat exchange pipe 51 directly flows out to the third connecting pipe 63 without passing through the connecting pipe 53 It flows to the outlet of the outer heat exchange pipe 52 because the outlet pressure of the outer heat exchange pipe 52 is higher than the inlet pressure of the inner heat exchange pipe 51 .

Referring to Figure 2, in the heating mode, the refrigerant is discharged from the exhaust port of the compressor 1, and flows to the inner heat exchange pipe 51 through the four-way valve 2, where it exchanges heat with the indoor air. The heat-exchanged refrigerant is connected to The pipeline 53 enters the external exhaust heat exchange pipeline 52, and after exchanging heat with the indoor air, it is discharged to the throttling element 4. The throttling element 4 throttles the refrigerant. The throttled refrigerant enters the outdoor heat exchanger 3 and exchanges heat with the outdoor air. The heat-exchanged refrigerant flows back to the compressor 1 through the four-way valve 2 .

It can be seen that the indoor heat exchanger 5 of the present application is provided with an inner heat exchange pipe 51 and an outer heat exchange pipe 52 that are independent of each other, and the first end of the inner heat exchange pipe 51 is connected to the outer heat exchange pipe 52 . The connecting pipe 53 is provided between the second ends of the heat exchange pipe 52, which allows the indoor heat exchanger 5 to have different flow splitting effects in different modes, thereby improving the heat exchange effect of the indoor heat exchanger 5 in different modes and improving the efficiency of the indoor heat exchanger 5. Overall machine energy efficiency.

Next, with further reference to Figures 1 and 2, the air conditioner of the present application will be introduced in detail.

As shown in Figures 1 and 2, in a preferred embodiment, the indoor heat exchanger 5 includes an inner heat exchange pipe 51 and an outer heat exchange pipe 52. The first end of the inner row heat exchange pipe 51 is provided with a first connecting pipe 61 , and the second end of the inner row heat exchange pipe 51 is provided with a second connecting pipe 62 . The first end of the external exhaust heat exchange pipeline 52 is provided with a third connecting pipe 63 , and the second end of the external exhaust heat exchange pipeline 52 is provided with a fourth connecting pipe 64 . Preferably, the inner row heat exchange pipe 51 includes a first inner row heat exchange pipe section 511 and a second inner row heat exchange pipe section 512. The first end of the first inner row heat exchange pipe section 511 and the second inner row heat exchange pipe section 512 The first end of the first inner row heat exchange pipe section 511 and the second end of the second inner row heat exchange pipe section 512 are connected to the second connecting pipe 62 at the same time. The outer exhaust heat exchange pipe 52 includes a first outer exhaust heat exchange pipe section 521 and a second outer exhaust heat exchange pipe section 522. The first end of the first outer exhaust heat exchange pipe section 521 and the first end of the second outer exhaust heat exchange pipe section 522 The second end of the first outer row heat exchange pipe section 521 and the second end of the second outer row heat exchange pipe section 522 are connected to the fourth connecting pipe 64 at the same time. Correspondingly, two communication pipes 53 are provided, one of which is connected between the first end of the first inner row heat exchange pipe section 511 and the second end of the first outer row heat exchange pipe section 521, and the other is connected between the second between the first end of the inner row heat exchange tube section 512 and the second end of the second outer row heat exchange tube section 522.

Furthermore, the first valve body 71 is provided on the communication pipe 53 . Preferably, the first valve body 71 is a one-way valve, and the one-way valve is configured to conduct the refrigerant when the refrigerant flows from the first end of the inner exhaust heat exchange pipeline 51 to the second end of the outer exhaust heat exchange pipeline 52 . A second valve body 72 is provided on the first connecting pipe 61 . Preferably, the second valve body 72 is a one-way valve, and the one-way valve is configured to conduct when the refrigerant flows into the first end of the inner exhaust heat exchange pipeline 51 .

The fourth connecting pipe 64 is also provided with a second three-way control valve 74. The first port (left end in Figure 1) and the second port (right end in Figure 1) of the second three-way control valve 74 are provided in the fourth connecting pipe. 64. The third port (the upper end in Figure 1 ) of the second three-way control valve 74 is connected to the second connecting pipe 62 .

Under the premise of the above arrangement, the flow direction of the refrigerant can be controlled through the first valve body 71, the second valve body 72, and the second three-way control valve 74, further improving the flow splitting effect of the indoor heat exchanger 5 and improving the heat exchange efficiency. .

The following is an introduction to the specific operating principle of the air conditioner based on Figure 1 and Figure 2.

As shown in Figure 1, in the cooling mode, the first port and the second port of the second three-way control valve 74 are controlled to be connected and the third port is disconnected, that is, the fourth connecting pipe 64 is connected, and the fourth connecting pipe 64 is connected to the third port. The three connecting tubes 63 are blocked. At this time, the refrigerant discharged from the compressor 1 first enters the outdoor heat exchanger 3 to exchange heat with the outdoor air, and then flows out from the outdoor heat exchanger 3 to the throttling element 4, which throttles the refrigerant. The throttled refrigerant enters the inner heat exchange pipe 51 and the outer heat exchange pipe 52 of the indoor heat exchanger 5 through the first connecting pipe 61 and the second connecting pipe 62 respectively. After heat exchange with the indoor air, The water flows out from the third connecting pipe 63 and the fourth connecting pipe 64 respectively, merges in front of the four-way valve 2 and flows into the compressor 1 . In this mode, the flow path of the refrigerant in the indoor heat exchanger 5 is two-in and two-out, with multiple flows, small pressure drop, and good heat exchange effect.

As shown in Figure 2, in the heating mode, the first port of the second three-way control valve 74 is controlled to be blocked, and the second port is connected to the third port, that is, the fourth connecting pipe 64 is blocked, and the fourth connecting pipe 64 is blocked. 64 is connected with the third connecting pipe 63 . At this time, the refrigerant discharged from the compressor 1 enters the third connecting pipe 63 and the fourth connecting pipe 64 respectively. The refrigerant in the fourth connecting pipe 64 merges with the third connecting pipe 63 and is separated from one end of the internal exhaust heat exchange pipe 51 Because the refrigerant enters the first inner row heat exchange pipe section 511 and the second inner row heat exchange pipe section 512 in two ways, and after heat exchange with the indoor air, due to the existence of the second one-way valve, the refrigerant cannot be discharged from the first connecting pipe 61. Instead, they all enter the first outer row heat exchange pipe section 521 and the second outer row heat exchange pipe section 522 through the connecting pipe 53, and after heat exchange with the indoor air, they merge into the second connecting pipe 62 and flow to the throttling element. 4. The throttling element 4 throttles the refrigerant. The throttled refrigerant enters the outdoor heat exchanger 3 and exchanges heat with the outdoor air. The heat-exchanged refrigerant flows back to the compressor 1 through the four-way valve 2 . In this mode, the flow path of the refrigerant in the indoor heat exchanger 5 is two in and one out. The heat exchanger serves as a condenser. The two in and one out method of convection heat exchange has a large temperature difference, a large degree of subcooling, and a good heat exchange effect. Air conditioning power is low.

It should be noted that the above preferred embodiments are only used to illustrate the principles of the present application and are not intended to limit the protection scope of the present application. Without departing from the principles of the present application, those skilled in the art can adjust the above settings so that the present application can be applied to more specific application scenarios.

For example, although the above embodiments are described with the first valve body 71 provided on the communication pipe 53, the provision of the first valve body 71 is not necessary, and those skilled in the art can selectively omit the provision. In addition, in addition to the one-way valve, the first valve body 71 can also be replaced by other valve bodies, such as a solenoid valve, an electronic expansion valve, etc.

For another example, in another alternative implementation, the provision of the second valve body 72 is not necessary, and those skilled in the art can make a selection based on specific application scenarios. In addition, the specific form of the second valve body 72 can be selected. In addition to the one-way valve, it can also be replaced by a solenoid valve or an electronic expansion valve. Or, as shown in Figure 3, the second valve body 72 can also be replaced by a first three-way control valve 73. The first port (left end in Figure 3) and the second port (Figure 3) of the first three-way control valve 73 The middle right end) is provided in the first connecting pipe 61, and the third port (lower end in FIG. 3) of the first three-way control valve 73 is connected with the third connecting pipe 63. By controlling the connectivity of the three ports of the first three-way control valve 73 , the above-mentioned effect of the second valve body 72 can also be achieved.

For another example, in another alternative embodiment, the setting of the second three-way valve is not necessary. Those skilled in the art can choose based on specific needs, and the second three-way valve can also be replaced by other valve bodies, such as This is achieved using two separate solenoid valves.

For another example, the specific structure of the indoor heat exchanger 5 is not static and can be adjusted by those skilled in the art. For example, the number of internal heat exchange pipes 51 and external heat exchange pipes 52 can be increased.

For another example, the specific composition forms of the inner heat exchange pipe 51 and the outer heat exchange pipe 52 are not unique. Those skilled in the art can select the number of heat exchange pipe sections included in the two based on specific application scenarios, and connect the pipes accordingly. The number of 53 also needs to be adjusted.

Of course, the above-mentioned alternative implementations, as well as the alternative implementations and the preferred implementations, can also be used in cross-combination, so as to combine new implementations to suit more specific application scenarios.

Those skilled in the art will understand that, although some embodiments described herein include certain features included in other embodiments but not others, combinations of features of different embodiments are meant to be within the scope of the present application. and form different embodiments. For example, in the claims of this application, any of the claimed embodiments may be used in any combination.

So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the drawings. However, those skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments. Without departing from the principles of this application, those skilled in the art can make equivalent changes or substitutions to relevant technical features, and the technical solutions after these modifications or substitutions will fall within the protection scope of this application.

Claims (10)

1. An indoor heat exchanger, characterized in that the indoor heat exchanger includes an inner heat exchange pipeline and an outer heat exchange pipeline that are independent of each other, and the first end of the inner heat exchange pipeline is provided There is a first connecting pipe. The second end of the inner row heat exchange pipe is provided with a second connecting pipe. The first end of the outer row heat exchange pipe is provided with a third connecting pipe. The outer row heat exchange pipe is provided with a third connecting pipe. A fourth connecting pipe is provided at the second end of the pipeline, and a communication pipeline is provided between the first end of the inner row heat exchange pipeline and the second end of the outer row heat exchange pipeline. 2. The indoor heat exchanger according to claim 1, wherein a first valve body is provided on the communication pipe. 3. The indoor heat exchanger according to claim 2, wherein the first valve body is a solenoid valve or an electronic expansion valve; or The first valve body is a one-way valve, and the one-way valve is configured to conduct the refrigerant when it flows from the first end of the inner exhaust heat exchange pipeline to the second end of the outer exhaust heat exchange pipeline. 4. The indoor heat exchanger according to claim 1, wherein a second valve body is provided on the first connecting pipe. 5. The indoor heat exchanger according to claim 4, wherein the second valve body is a solenoid valve or an electronic expansion valve; or The second valve body is a one-way valve, and the one-way valve is configured to conduct when the refrigerant flows into the first end of the inner exhaust heat exchange pipeline. 6. The indoor heat exchanger according to claim 1, wherein the inner row heat exchange pipeline includes a first internal row heat exchange pipe section and a second internal row heat exchange pipe section, and the first internal row heat exchange pipe section The first end of the heat pipe section and the first end of the second inner row heat exchange pipe section are connected to the first connecting pipe at the same time, and the second end of the first inner row heat exchange pipe section and the second inner row heat exchange pipe section are connected to the first connecting pipe at the same time. The second end of the heat exchange pipe section is connected to the second connecting pipe at the same time, The outer exhaust heat exchange pipeline includes a first outer exhaust heat exchange pipe section and a second outer exhaust heat exchange pipe section. The first end of the first outer exhaust heat exchange pipe section and the third end of the second outer exhaust heat exchange pipe section One end is connected to the third connecting pipe at the same time, and the second end of the first outer row heat exchange pipe section and the second end of the second outer row heat exchange pipe section are connected to the fourth connecting pipe at the same time, There are two connecting pipes, one of which is connected between the first end of the first inner row heat exchange pipe section and the second end of the first outer row heat exchange pipe section, and the other one is connected between the first end of the first inner row heat exchange pipe section and the second end of the first outer row heat exchange pipe section. between the first end of the second inner row heat exchange tube section and the second end of the second outer row heat exchange tube section. 7. The indoor heat exchanger according to claim 1, wherein a first three-way control valve is provided on the first connecting pipe, and the first port and the second port of the first three-way control valve It is provided on the first connecting pipe, and the third port of the first three-way control valve is connected with the third connecting pipe. 8. The indoor heat exchanger according to claim 1, wherein a second three-way control valve is provided on the fourth connecting pipe, and the first port and the second port of the second three-way control valve It is provided on the fourth connecting pipe, and the third port of the second three-way control valve is connected with the second connecting pipe. 9. An indoor unit, characterized in that the indoor unit includes the indoor heat exchanger according to any one of claims 1 to 8. 10. An air conditioner, characterized in that the air conditioner includes the indoor unit according to claim 9.