Control method and device for air conditioner and air conditioner

Abstract

The application relates to the air conditioning technical field and discloses a control method and device for an air conditioner and the air conditioner. The air conditioner comprises an indoor unit, the indoor unit comprises an indoor heat exchanger, the indoor heat exchanger comprises a plurality of heat exchange channels and dehumidification valves, the plurality of heat exchange channels comprise a first heat exchange channel, a second heat exchange channel and a third heat exchange channel arranged in sequence along the airflow flowing direction in the indoor unit, the dehumidification valves comprise first dehumidification valves and second dehumidification valves, the first dehumidification valves are communicated between the first heat exchange channel and the second heat exchange channel, the second dehumidification valves are communicated between the second heat exchange channel and the third heat exchange channel, a first end of the indoor heat exchanger is communicated with a compressor, and a second end of the indoor heat exchanger is communicated with a throttling device. The method comprises the following steps: acquiring the temperature and humidity in the room; and controlling the opening degrees of the first dehumidification valves and the second dehumidification valves and the refrigerant flow direction of the indoor heat exchanger according to the temperature and humidity in the room. The temperature range of the indoor heat exchanger is increased, and the use experience of users is improved.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, such as a control method, device, and air conditioner for air conditioning. Background Technology

[0002] Currently, household air conditioners are widely used in my country, serving as both cooling and dehumidifiers in summer and heating in winter. Dehumidification technology involves operating the air conditioner in cooling mode while keeping the indoor unit's fan at a low speed. In this mode, the indoor unit's evaporator cools the indoor air until it reaches its dew point, at which point condensation occurs, thus achieving dehumidification.

[0003] In related technologies, constant temperature dehumidification is generally used, which is a process of reheating the air that has been cooled by the evaporator, so that the temperature of the dehumidified air is raised again, ensuring that the indoor air temperature is relatively stable.

[0004] In the process of implementing the embodiments of this disclosure, at least the following problems were found in the related art:

[0005] Users have different specific dehumidification needs in different scenarios. During the humid season, the temperature is not high, but the humidity is very high, so users have a greater need for dehumidification with heating. During the plum rain season, the temperature is suitable but the humidity is high, so constant temperature dehumidification can meet the needs. The constant temperature dehumidification function in related technologies is relatively simple and cannot meet the needs of various user scenarios.

[0006] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0007] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0008] This disclosure provides a control method, device, and air conditioner for air conditioning, in order to improve the versatility of air conditioning use and meet various user scenarios.

[0009] This disclosure provides a control method for an air conditioner. The air conditioner includes an indoor unit, which includes an indoor heat exchanger. The indoor heat exchanger includes multiple heat exchange channels and a dehumidification valve. The multiple heat exchange channels include a first heat exchange channel, a second heat exchange channel, and a third heat exchange channel arranged sequentially along the airflow direction inside the indoor unit. The dehumidification valve includes a first dehumidification valve and a second dehumidification valve. The first dehumidification valve is connected between the first and second heat exchange channels, and the second dehumidification valve is connected between the second and third heat exchange channels. A first end of the indoor heat exchanger is connected to a compressor, and a second end of the indoor heat exchanger is connected to a throttling device. The method includes: acquiring the indoor temperature and humidity; and controlling the opening degree of the first and second dehumidification valves and the refrigerant flow direction of the indoor heat exchanger based on the indoor temperature and humidity.

[0010] Optionally, based on the indoor temperature and humidity, the opening degree of the first dehumidification valve and the second dehumidification valve, as well as the refrigerant flow direction of the indoor heat exchanger, are controlled, including: when the indoor temperature is greater than or equal to a first temperature threshold and the indoor humidity is less than a first humidity threshold, the refrigerant of the indoor heat exchanger is controlled to flow from the second end of the indoor heat exchanger to the first end of the indoor heat exchanger, and the first dehumidification valve and the second dehumidification valve are fully opened.

[0011] Optionally, based on the indoor temperature and humidity, the opening degree of the first dehumidification valve and the second dehumidification valve, as well as the refrigerant flow direction of the indoor heat exchanger, are controlled, including: when the indoor temperature is greater than or equal to a first temperature threshold and the indoor humidity is greater than or equal to a first humidity threshold, the refrigerant of the indoor heat exchanger is controlled to flow from the second end of the indoor heat exchanger to the first end of the indoor heat exchanger, and the first dehumidification valve is controlled to open to a first preset opening degree, and the second dehumidification valve is controlled to be fully open.

[0012] Optionally, based on the indoor temperature and humidity, the opening degree of the first dehumidification valve and the second dehumidification valve, as well as the refrigerant flow direction of the indoor heat exchanger, are controlled, including: when the indoor temperature is greater than or equal to a second temperature threshold and less than a first temperature threshold, and the indoor humidity is greater than or equal to a second humidity threshold, the refrigerant in the indoor heat exchanger is controlled to flow from the first end of the indoor heat exchanger to the second end of the indoor heat exchanger, the first dehumidification valve is controlled to open to a second preset opening degree, and the second dehumidification valve and the throttling device are controlled to be fully open.

[0013] Optionally, based on the indoor temperature and humidity, the opening degree of the first dehumidification valve and the second dehumidification valve, as well as the refrigerant flow direction of the indoor heat exchanger, are controlled, including: when the indoor temperature is less than a second temperature threshold and the indoor humidity is greater than a third humidity threshold, the refrigerant of the indoor heat exchanger is controlled to flow from the first end of the indoor heat exchanger to the second end of the indoor heat exchanger, the first dehumidification valve and the throttling device are fully opened, and the second dehumidification valve is controlled to open to a third preset opening degree.

[0014] Optionally, when the refrigerant flows from the first end to the second end of the indoor heat exchanger, a condensing reheat section is formed between the first dehumidification valve and the first end of the indoor heat exchanger. After controlling the opening degree of the first and second dehumidification valves and the refrigerant flow direction of the indoor heat exchanger, the method further includes: obtaining the temperature of the condensing reheat section, and / or obtaining the compressor's discharge temperature and / or return gas temperature; when the temperature of the condensing reheat section is greater than or equal to a first preset temperature, controlling the indoor unit's fan speed to increase; when the compressor's discharge temperature is greater than or equal to a second preset temperature and / or the compressor's return gas temperature is greater than a third preset temperature, controlling the outdoor unit's fan speed to decrease.

[0015] Optionally, after the fan speed of the indoor unit reaches the first speed threshold, the method further includes: when the temperature of the condensing reheat section is still greater than or equal to the first preset temperature, controlling the fan frequency of the indoor unit to decrease to the first preset frequency.

[0016] Optionally, after the outdoor unit's fan speed is reduced to the second speed threshold, the method further includes: when the compressor's exhaust temperature is greater than the second preset temperature or the compressor's return temperature is greater than the third preset temperature, controlling the outdoor unit's fan frequency to be reduced to the second preset frequency.

[0017] This disclosure also provides a control device for an air conditioner, including a processor and a memory storing program instructions, wherein the processor is configured to execute the control method for an air conditioner as described in any of the above embodiments when running the program instructions.

[0018] This disclosure also provides an air conditioner, characterized in that it includes: an air conditioner body; and a control device for the air conditioner described in the above embodiments, which is installed on the air conditioner body.

[0019] The control method, apparatus, and air conditioner for air conditioning provided in this disclosure can achieve the following technical effects:

[0020] In this embodiment, a dehumidifying valve is provided between two adjacent heat exchange channels. This dehumidifying valve throttles the refrigerant flowing through it, ensuring that the temperature of the refrigerant downstream of the valve is lower than that upstream. This allows the heat exchanger to be divided into multiple temperature ranges for dehumidification. Multiple dehumidifying valves are provided, with the first and second dehumidifying valves connected in series. This allows the dehumidifying valves within the heat exchange tube group to undergo multiple throttling processes, further increasing the number of different temperature ranges in the heat exchanger. This enhances the versatility of dehumidification and temperature control, improving the user experience. Furthermore, the air conditioner can control the opening of the first and second dehumidifying valves based on the indoor temperature and humidity, allowing for timely adjustments to meet the needs of different temperature and humidity environments. Moreover, the air conditioner can adjust the refrigerant flow direction in the indoor heat exchanger, further increasing the temperature range of the indoor heat exchanger and enabling more diverse functions, thus improving the user experience.

[0021] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0022] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0023] Figure 1 This is a schematic diagram of the structure of an indoor heat exchanger provided in an embodiment of this disclosure;

[0024] Figure 2 This is a schematic diagram of refrigerant flow in an indoor heat exchanger provided in an embodiment of the present disclosure, showing the refrigerant flowing from the first end of the first heat exchange tube group to the second end of the first heat exchange tube group.

[0025] Figure 3 This is a schematic diagram of refrigerant flow in an indoor heat exchanger provided in an embodiment of the present disclosure, where the refrigerant flows from the second end of the first heat exchange tube group to the first end of the first heat exchange tube group.

[0026] Figure 4 This is a schematic diagram of another indoor heat exchanger provided in an embodiment of this disclosure;

[0027] Figure 5 This is a schematic diagram of the refrigerant flow in another indoor heat exchanger provided in this embodiment of the present disclosure, where the refrigerant flows from the first end of the first heat exchange tube group to the second end of the first heat exchange tube group.

[0028] Figure 6This is a schematic diagram of refrigerant flow in another indoor heat exchanger provided in this embodiment of the present disclosure, where the refrigerant flows from the second end of the first heat exchange tube group to the first end of the first heat exchange tube group.

[0029] Figure 7 This is a schematic diagram of another indoor heat exchanger provided in an embodiment of this disclosure;

[0030] Figure 8 This is a schematic diagram of another indoor heat exchanger provided in an embodiment of this disclosure;

[0031] Figure 9 This is a schematic diagram of a control method for an air conditioner provided in an embodiment of this disclosure;

[0032] Figure 10 This is a schematic diagram of a control method for an air conditioner provided in an embodiment of this disclosure;

[0033] Figure 11 This is a schematic diagram of a control method for an air conditioner provided in an embodiment of this disclosure;

[0034] Figure 12 This is a schematic diagram of a control method for an air conditioner provided in an embodiment of this disclosure;

[0035] Figure 13 This is a schematic diagram of a control method for an air conditioner provided in an embodiment of this disclosure;

[0036] Figure 14 This is a schematic diagram of a control method for an air conditioner provided in an embodiment of this disclosure;

[0037] Figure 15 This is a schematic diagram of a control method for an air conditioner provided in an embodiment of this disclosure;

[0038] Figure 16 This is a schematic diagram of the structure of an air conditioner provided in an embodiment of this disclosure.

[0039] Figure label:

[0040] 10. First heat exchange tube assembly; 101. First heat exchange channel; 102. Second heat exchange channel; 103. Third heat exchange channel; 104. First pipeline; 105. Second pipeline; 106. Third pipeline; 107. Fourth pipeline; 201. First dehumidification valve; 202. Second dehumidification valve; 203. Third dehumidification valve; 30. Diverter; 301. First valve; 302. Second valve; 40. Second heat exchange tube assembly; 401. Fourth heat exchange channel; 402. Connecting pipeline; 50. Throttling device; 60. Liquid storage tank; 70. Gas-liquid separator; 90. Control device for air conditioning; 900. Processor; 901. Memory; 902. Communication interface; 903. Bus. Detailed Implementation

[0041] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0042] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for describing embodiments of this disclosure herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0043] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0044] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0045] Unless otherwise stated, the term "multiple" means two or more.

[0046] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0047] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0048] For ease of description, the temperature of the refrigerant indicated by the solid arrow in the attached diagram is greater than the temperature of the refrigerant indicated by the dashed arrow.

[0049] Combination Figures 1 to 8 As shown in the illustration, this disclosure provides an air conditioner including a refrigerant circulation loop. The refrigerant circulation loop includes a compressor, an indoor unit, a throttling device 50, and an outdoor unit connected by refrigerant piping. The refrigerant circulation loop also includes a four-way valve capable of switching the refrigerant flow direction within the loop. When the air conditioner is heating, the high-temperature, high-pressure refrigerant from the compressor flows through the four-way valve into the indoor heat exchanger of the indoor unit. After condensation and heat dissipation in the outdoor heat exchanger, it flows from the indoor heat exchanger to the throttling device 50 for throttling before flowing into the outdoor heat exchanger of the outdoor unit. When the air conditioner is cooling, the high-temperature, high-pressure refrigerant from the compressor flows through the four-way valve into the outdoor heat exchanger of the outdoor unit. After flowing out of the outdoor heat exchanger and being throttled by the throttling device 50, it flows into the outdoor heat exchanger of the indoor unit for evaporative cooling.

[0050] Optionally, the throttling device 50 may be an electronic expansion valve or a capillary tube, etc.

[0051] This disclosure provides an air conditioner, which includes an indoor unit, an indoor heat exchanger, a heat exchange tube assembly, and a plurality of heat exchange channels forming a heat exchange tube assembly (hereinafter referred to as the first heat exchange tube assembly 10 for easy distinction). The first heat exchange tube assembly 10 includes a plurality of heat exchange channels, a first end of the first heat exchange tube assembly 10 is adapted to be connected to a compressor, a second end of the first heat exchange tube assembly 10 is adapted to be connected to a throttling device 50, and the plurality of heat exchange channels are connected between the first end and the second end of the first heat exchange tube assembly 10.

[0052] In this embodiment of the disclosure, multiple heat exchange channels are connected between the first end and the second end of the first heat exchange tube group 10. The heat exchange channels include fins and refrigerant pipelines. When the refrigerant flows into the heat exchange channels, it can exchange heat through the fins to achieve cooling or heating.

[0053] Optionally, the indoor heat exchanger also includes a dehumidifying valve, which is located between heat exchange channels or between two adjacent heat exchange channels. The dehumidifying valve can throttle the refrigerant so that the temperature of the refrigerant downstream of the dehumidifying valve is lower than the temperature of the refrigerant upstream of the dehumidifying valve. In this embodiment, the indoor heat exchanger is equipped with a dehumidifying valve, which is located between adjacent heat exchange channels or inside the heat exchange channels. The dehumidifying valve has a throttling function, so that the temperature of the refrigerant is further reduced after passing through the dehumidifying valve. This ensures that the temperature of the refrigerant downstream of the dehumidifying valve is lower than the temperature of the refrigerant upstream of the dehumidifying valve, so that the downstream of the dehumidifying valve can be used for dehumidification, thereby enabling the indoor heat exchanger to have a dehumidifying function. The upstream of the dehumidifying valve can be a reheat condensing section or a refrigeration section. Optionally, the dehumidifying valve does not throttle when fully open, but can throttle after opening to a certain degree.

[0054] Optionally, when the refrigerant flows from the first end of the first heat exchanger tube group 10 to the second end of the first heat exchanger tube group 10, a condensation reheat section is formed between the dehumidification valve and the first end of the indoor heat exchanger, and a dehumidification section is formed between the dehumidification valve and the second end of the indoor heat exchanger; wherein, the area of ​​the condensation reheat section is larger than the area of ​​the dehumidification section, or the area of ​​the condensation reheat section is smaller than the area of ​​the dehumidification section.

[0055] In this embodiment, when the refrigerant flows from the first end to the second end of the first heat exchange tube assembly 10, the high-temperature, high-pressure refrigerant from the compressor flows into the first heat exchange tube assembly 10 through the first end. After being throttled by the dehumidification valve, its temperature decreases. Thus, the heat exchange channel between the dehumidification valve and the first end of the first heat exchange tube assembly 10 forms a condensation-reheat section, and the heat exchange channel between the dehumidification valve and the second end of the first heat exchange tube assembly 10 forms a dehumidification section. The airflow in the indoor unit first flows through the condensation-reheat section for heating, and then flows through the dehumidification section for cooling and dehumidification. Therefore, when the indoor temperature needs to be moderately increased but the humidity is high, the airflow flows through the condensation-reheat section for heating before flowing through the dehumidification section, thus achieving dehumidification and maintaining a constant temperature. Alternatively, the airflow in the indoor unit can first flow through the dehumidification section for dehumidification, and then flow through the condensation-reheat section for heating, thereby achieving constant temperature dehumidification. The area of ​​the condensation-reheat section is larger than the area of ​​the dehumidification section, resulting in a larger heating range, suitable for environments with low humidity. The area of ​​the condensing reheat section can also be smaller than that of the dehumidification section, making it suitable for environments with high humidity. This allows for the selection of indoor heat exchangers at different locations of the dehumidification valve based on the specific environment, thereby achieving varying dehumidification effects.

[0056] Optionally, the ratio of the area of ​​the condensing reheat section to the area of ​​the indoor heat exchanger is in the range of 1 / 3 to 3 / 4.

[0057] In this embodiment, when the ratio of the area of ​​the condensing reheat section to the area of ​​the indoor heat exchanger is less than 1 / 3, the area of ​​the condensing reheat section is too small, leading to incomplete refrigerant condensation. The refrigerant will be in a two-phase state when passing through the dehumidification valve, causing significant cold impact on the valve core, resulting in very high noise, large throttling energy loss, and affecting the normal operation of the refrigerant circuit. When the ratio of the area of ​​the condensing reheat section to the area of ​​the indoor heat exchanger is greater than 3 / 4, the area of ​​the dehumidification section is too small, resulting in insignificant dehumidification. The ratio of the area of ​​the condensing reheat section to the area of ​​the indoor heat exchanger should be between 1 / 3 and 3 / 4. This ensures sufficient refrigerant condensation, with the refrigerant completely becoming liquid, or even subcooled, which is beneficial for dehumidification and reduces noise.

[0058] Optionally, the ratio of the area of ​​the condensing reheat section to the area of ​​the indoor heat exchanger is in the range of 1 / 3 to 2 / 3.

[0059] In this embodiment, the ratio of the area of ​​the condensing reheat section to the area of ​​the indoor heat exchanger is further reduced to the range of 1 / 3-2 / 3, which can ensure the uniformity of refrigerant flow in the indoor heat exchanger and maximize the efficiency of refrigerant condensation and dehumidification effect of the dehumidification section.

[0060] For example, the ratio of the area of ​​the condensing reheat section to the area of ​​the indoor heat exchanger is 1 / 3, 1 / 2, 2 / 3, or 3 / 4, etc.

[0061] Optionally, such as Figures 1 to 3 As shown, there are multiple dehumidification valves, and these multiple dehumidification valves can be connected in series.

[0062] In this embodiment, multiple dehumidification valves are provided, and these multiple dehumidification valves can be connected in series. In this way, the dehumidification valves in the first heat exchange tube group 10 can undergo multiple throttling processes, further increasing the number of different temperature ranges of the indoor heat exchanger. This can improve the diversity and range of dehumidification and temperature control, and enhance the user experience.

[0063] Optionally, multiple dehumidification valves and multiple heat exchange channels are arranged alternately and at intervals.

[0064] In this embodiment of the disclosure, when there are multiple dehumidification valves, the dehumidification valves and heat exchange channels can be arranged alternately and at intervals, so that different heat exchange channels can form different temperatures, further improving the temperature range and temperature range.

[0065] Optionally, the plurality of dehumidifying valves include a first dehumidifying valve 201 and a second dehumidifying valve 202. The distance between the first dehumidifying valve and the first end of the first heat exchange tube assembly 10 is less than the distance between the first dehumidifying valve and the second end of the first heat exchange tube assembly 10; the distance between the second dehumidifying valve and the first end of the first heat exchange tube assembly 10 is greater than the distance between the second dehumidifying valve and the second end of the first heat exchange tube assembly 10; wherein the first dehumidifying valve and the second dehumidifying valve can be connected in series between the first end and the second end of the heat exchange tube assembly.

[0066] In this embodiment, the first dehumidification valve is located near the first end of the heat exchange tube assembly, and the second dehumidification valve is located near the second end of the first heat exchange tube assembly. This allows for throttling of the front and rear of the indoor heat exchanger, respectively, thereby improving the uniformity of the refrigerant temperature distribution.

[0067] Optionally, when there are multiple dehumidification valves, the condensing reheat section refers to the part between the dehumidification valve closest to the compressor and the first end of the first heat exchange tube group, and the dehumidification section refers to the part between the dehumidification valve closest to the compressor and the second end of the first heat exchange tube group.

[0068] Optionally, the first heat exchange tube group 10 further includes a flow distribution component located within the first heat exchange tube group 10. The flow distribution component enables multiple heat exchange channels to be connected in series when the refrigerant flows from the first end of the first heat exchange tube group 10 to the second end of the first heat exchange tube group 10, and multiple heat exchange channels to be connected in parallel when the refrigerant flows from the second end of the first heat exchange tube group 10 to the first end of the first heat exchange tube group 10.

[0069] In this embodiment, the flow-diverting component ensures that the refrigerant flows differently when switching between cooling and heating modes in the indoor heat exchanger. This results in the refrigerant flowing through more branches from the second end to the first end of the first heat exchange tube group 10, effectively reducing the pressure drop along the flow path and improving heat exchange efficiency. Conversely, when the refrigerant flows from the first end to the second end of the first heat exchange tube group 10, the flow path becomes longer, the branches become shorter, the flow velocity increases, and circulation is improved, increasing the heat transfer coefficient inside the tubes and further enhancing heat exchange efficiency.

[0070] In addition, by using a diversion component and a dehumidification valve, the indoor heat exchanger can not only have a dehumidification function, but also improve heat exchange efficiency, thereby improving the energy efficiency of the air conditioner.

[0071] Optionally, the number of heat exchange channels can be three, four, five, or six, depending on the size of the indoor heat exchanger.

[0072] Optionally, the multiple heat exchange channels include a first heat exchange channel 101, a second heat exchange channel 102, and a third heat exchange channel 103. When the refrigerant flows from the first end of the first heat exchange tube group 10 to the second end of the first heat exchange tube group 10, the first heat exchange channel 101, the second heat exchange channel 102, and the third heat exchange channel 103 are connected in series along the flow direction of the refrigerant. When the refrigerant flows from the second end of the first heat exchange tube group 10 to the first end of the first heat exchange tube group 10, the first heat exchange channel 101, the second heat exchange channel 102, and the third heat exchange channel 103 are connected in parallel between the first end of the first heat exchange tube group 10 and the second end of the first heat exchange tube group 10.

[0073] In this embodiment, the three heat exchange channels of the indoor heat exchanger can achieve variable flow distribution during cooling and heating. When the refrigerant flows from the first end to the second end of the first heat exchange tube group 10, the high-temperature and high-pressure refrigerant at the first end of the first heat exchange tube group 10 flows sequentially through the first heat exchange channel 101, the second heat exchange channel 102, and the third heat exchange channel 103 connected in series before flowing out from the second end of the first heat exchange tube group 10. This increases the flow velocity, improves circulation, increases the heat transfer coefficient inside the tubes, and improves heat exchange efficiency. When the refrigerant flows from the second end to the first end of the first heat exchange tube group 10, the low-temperature refrigerant flowing into the second end of the first heat exchange tube group 10 flows to the three heat exchange channels respectively. The three heat exchange channels are arranged in parallel, which increases the flow branches, effectively reduces the pressure drop of the refrigerant along the flow path, and improves heat exchange efficiency.

[0074] Optionally, when the first heat exchange channel 101, the second heat exchange channel 102, and the third heat exchange channel 103 are connected in series, the first dehumidification valve 201 is located between the first heat exchange channel 101 and the second heat exchange channel 102, and the second dehumidification valve 202 is located between the second heat exchange channel 102 and the third heat exchange channel 103.

[0075] In this embodiment, when the first dehumidification valve 201 is located in the first heat exchange channel 101 and the second heat exchange channel 102, the refrigerant flows from the first end of the first heat exchange tube group 10 to the second end of the first heat exchange tube group 10. In this case, the first heat exchange channel 101 is a condensation and reheat section, and the second heat exchange channel 102 and the third heat exchange channel 103 are dehumidification sections. In this configuration, the refrigerant enters the indoor heat exchanger for condensation and simultaneously heats the air. After being throttled by the dehumidification valve, the refrigerant experiences a decrease in temperature and pressure, evaporating and absorbing heat while simultaneously cooling and dehumidifying the air. This results in a larger dehumidification area, making it suitable for applications in environments with high humidity.

[0076] Optionally, when the dehumidification valve is located in the fourth pipe 107, the indoor heat exchanger also includes an electric heater, which corresponds to the first heat exchange channel 101 and is used for supplementary heating.

[0077] In this embodiment, the indoor heat exchanger is a variable flow dehumidification indoor heat exchanger with a small condensation reheat area. When the heat is insufficient, an electric heater can be turned on to supplement the heating. At the same time, because the relative humidity is below 95% after the hot and cold air is premixed, the amount of water droplets is greatly reduced. Turning on the electric heater at this time will avoid water droplets directly contacting the electric heater and causing flashing noise.

[0078] The second dehumidification valve 202 is located between the second heat exchange channel 102 and the third heat exchange channel 103. When the refrigerant flows from the first end of the first heat exchange tube group 10 to the second end of the first heat exchange tube group 10, the first heat exchange channel 101 and the second heat exchange channel 102 are condensation and reheat sections, and the third heat exchange channel 103 is a dehumidification section. This results in a smaller dehumidification area and a larger reheat condensation area, which allows for more complete refrigerant condensation. The loss after throttling by the dehumidification valve is also smaller, and the temperature after throttling by the dehumidification valve can be lower, thus achieving efficient dehumidification.

[0079] Optionally, the first heat exchange channel 101, the second heat exchange channel 102, and the third heat exchange channel 103 have the same area, which improves the uniformity of refrigerant distribution. Furthermore, the dehumidification valve is located between the first heat exchange channel 101 and the second heat exchange channel 102, so the ratio of the area of ​​the condensation reheat section to the area of ​​the dehumidification section is 1 / 2. Alternatively, the dehumidification valve is located between the second heat exchange channel 102 and the third heat exchange channel 103, so the ratio of the area of ​​the condensation reheat section to the area of ​​the dehumidification section is 2.

[0080] Optionally, the first heat exchange tube assembly 10 further includes a first pipe 104, a second pipe 105, a third pipe 106, a fourth pipe 107, and a distributor 30. The first end of the first pipe 104 is adapted to connect to the compressor, and the second end of the first pipe 104 connects to the first end of the first heat exchange channel 101 and the first end of the second heat exchange channel 102. The first end of the second pipe 105 connects to the second end of the first pipe 104 and the first end of the second heat exchange channel 102, and the second end of the second pipe 105 connects to the first end of the third heat exchange channel 103. The first end of the distributor 30 connects to the second end of the first heat exchange channel 101 and the second end of the second heat exchange channel 102, and both the second end of the distributor 30 and the second end of the third heat exchange channel 103 are adapted to connect to the throttling device 50. The third pipe 106 is adapted to connect between the second end of the distributor 30 and the throttling device 50. The fourth pipe 107 connects between the second end of the first indoor heat exchanger and the first end of the distributor 30.

[0081] The diversion assembly includes a first valve 301 and a second valve 302. The first valve 301 is located in the first pipeline 104 and is configured to be open when the refrigerant flows from the first end of the second heat exchange channel 102 toward the first end of the second heat exchange channel 102. The second valve 302 is located in the third pipeline 106 and is configured to be open when the refrigerant flows from the throttling device 50 toward the distributor. When the refrigerant flows from the first end of the first heat exchange tube group 10 to the second end of the first heat exchange tube group 10, both the first valve 301 and the second valve 302 are closed, so that the first heat exchange channel 101, the second heat exchange channel 102 and the third heat exchange channel 103 are connected in series. When the refrigerant flows from the second end of the first heat exchange tube group 10 to the first end of the first heat exchange tube group 10, both the first valve 301 and the second valve 302 are open, so that the first heat exchange channel 101, the second heat exchange channel 102 and the third heat exchange channel 103 are arranged in parallel.

[0082] In this embodiment of the present disclosure, when the refrigerant flows from the first end of the first heat exchange tube group 10 to the second end of the first heat exchange tube group 10, the first valve 301 and the second valve 302 are closed, so the first pipeline 104 and the third pipeline 106 are not connected. Thus, the high-temperature and high-pressure refrigerant flowing out of the compressor flows into the first heat exchange channel 101 and then into the fourth pipeline 107, and then into the second heat exchange channel 102 from the fourth pipeline 107, and then into the second pipeline 105 from the second heat exchange channel 102, and then into the third heat exchange channel 103 along the second pipeline 105, and then into the second end of the first heat exchange tube group 103, and then into the second end of the first heat exchange tube group 10, and then out of the indoor heat exchanger from the second end of the first heat exchange tube group 10.

[0083] When the refrigerant flows from the second end of the first heat exchange tube group 10 to the first end of the first heat exchange tube group 10, both the first valve 301 and the second valve 302 are open, so both the first pipeline 104 and the third pipeline 106 are open. Thus, the refrigerant throttled by the throttling device 50 flows into the second end of the first heat exchange tube group 10, and then flows to the third heat exchange channel 103 and the distributor 30 respectively. After passing through the distributor 30, it flows to the first heat exchange channel 101 and the second heat exchange channel 102 respectively. Then, the refrigerant from the three heat exchange channels flows out and converges at the first end of the first heat exchange tube group 10 before flowing out of the indoor heat exchanger.

[0084] Optionally, the first valve 301 can be a solenoid valve, a Tesla valve, a ball valve, or a check valve, etc.

[0085] Optionally, the second valve 302 can be a solenoid valve, Tesla valve, ball valve, or check valve, etc.

[0086] Alternatively, the dehumidification valve may include a capillary tube or an electronic expansion valve.

[0087] In this embodiment, the dehumidification valve can be a capillary tube or an electronic expansion valve, which enables throttling of the refrigerant. The high-temperature, high-pressure liquid refrigerant experiences a sudden pressure drop as it passes through the capillary tube or electronic expansion valve. Due to the pressure reduction, some of the refrigerant evaporates, forming a gas-liquid mixture and lowering its temperature.

[0088] Optionally, when the dehumidification valve includes a capillary tube, the dehumidification valve includes a first bypass pipe and a first solenoid valve, the first bypass pipe being connected in parallel with the capillary tube, and the first solenoid valve being located in the first bypass pipe.

[0089] In this embodiment, the dehumidifier valve includes a first bypass pipe and a capillary tube connected in parallel, allowing the dehumidifier valve to switch between throttling and non-throttling functions. When the first solenoid valve is closed, the first bypass pipe is closed, and the refrigerant flows through the capillary tube for throttling, thus achieving the throttling function of the dehumidifier valve. When the first solenoid valve is open, the first bypass pipe is open, and the refrigerant flows through the first bypass pipe without passing through the capillary tube, allowing the dehumidifier valve to be fully open without throttling, so that the temperature and pressure of the flowing refrigerant do not change.

[0090] Optionally, when the dehumidification valve includes an electronic expansion valve, the dehumidification valve includes a second bypass pipeline and a second solenoid valve, the second bypass pipeline being connected in parallel with the electronic expansion valve, and the second solenoid valve being located in the second bypass pipeline.

[0091] In this embodiment, the dehumidifier valve includes a second bypass pipe and an electronic expansion valve connected in parallel. This allows the dehumidifier valve to switch between throttling and non-throttling functions. When the second solenoid valve is closed, the second bypass pipe is closed, and the refrigerant flows through the electronic expansion valve for throttling, thus achieving the throttling function of the dehumidifier valve. When the second solenoid valve is open, the second bypass pipe is open, and the refrigerant flows through the second bypass pipe without passing through the electronic expansion valve, allowing the dehumidifier valve to be fully open without throttling, ensuring that the temperature and pressure of the flowing refrigerant remain unchanged.

[0092] Optionally, such as Figures 1 to 3 As shown, the first heat exchange tube assembly 10 includes a first heat exchange channel 101, a second heat exchange channel 102, and a third heat exchange channel 103. When there are multiple dehumidification valves, the multiple dehumidification valves include a first dehumidification valve 201 and a second dehumidification valve 202. The first dehumidification valve 201 is located in the fourth pipeline 107 and can throttle the refrigerant in the third pipeline 106. The second dehumidification valve 202 is located in the second pipeline 105 and can throttle the refrigerant in the second pipeline 105.

[0093] In this embodiment of the present disclosure, the first heat exchange tube assembly 10 is provided with two dehumidification valves, such that... Figure 2As shown, when the refrigerant flows from the first end of the first heat exchange tube group 10 to the second end, the two dehumidification valves are connected in series. Thus, the refrigerant flowing out of the first heat exchange channel 101 is throttled and cooled by the first dehumidification valve 201 before flowing into the second heat exchange channel 102. The refrigerant flowing out of the second heat exchange channel 102 can be throttled and cooled again by the second dehumidification valve 202 before flowing into the third heat exchange channel 103. This results in different temperatures in the first, second, and third heat exchange channels 101 and 102, enabling more diverse temperature and humidity regulation. It can be understood that the first and second dehumidification valves 201 and 202 can also be either completely unthrottled or one can be throttled while the other is fully open, further increasing the range of temperature and humidity regulation for the indoor heat exchanger and enhancing its versatility.

[0094] Similarly, as Figure 3 As shown, when the refrigerant flows from the second end to the first end of the first heat exchange tube assembly, the first heat exchange channel 101, the second heat exchange channel 102, and the third heat exchange channel 103 are connected in parallel. When the first dehumidification valve 201 is opened for throttling, it can throttle and cool the refrigerant flowing into the first heat exchange channel 101. In this way, the temperature of the first heat exchange channel 101 is lower than the temperature of the second heat exchange channel 102 and the third heat exchange channel 103, which can achieve deep dehumidification. The first dehumidification valve 201 and the second dehumidification valve 202 can also be fully opened without throttling, thus achieving both cooling and dehumidification.

[0095] Optionally, when the dehumidification valve includes a capillary tube, the first dehumidification valve 201 includes a first capillary tube, the second dehumidification valve 202 includes a second capillary tube, and the length of the first capillary tube is greater than the length of the second capillary tube.

[0096] In this embodiment of the present disclosure, when the refrigerant flows from the first end of the first heat exchange tube group 10 to the second end of the first heat exchange tube group 10, the first dehumidification valve 201 is close to the first end of the first heat exchange tube group 10, and the second dehumidification valve 202 is located downstream of the first dehumidification valve 201. Therefore, the temperature of the refrigerant flowing into the first dehumidification valve 201 is higher. As a result, the length of the first capillary tube of the first dehumidification valve 201 is greater than the length of the second capillary tube, which can improve the throttling effect of the first dehumidification valve 201.

[0097] Optionally, when the dehumidification valve includes an electronic expansion valve, the first dehumidification valve 201 includes a first electronic expansion valve, the second dehumidification valve 202 includes a second electronic expansion valve, and the opening degree of the first electronic expansion valve is smaller than the opening degree of the second electronic expansion valve.

[0098] In this embodiment of the present disclosure, when the refrigerant flows from the first end of the first heat exchange tube group 10 to the second end of the first heat exchange tube group 10, the first dehumidification valve 201 is close to the first end of the first heat exchange tube group 10, and the second dehumidification valve 202 is located downstream of the first dehumidification valve 201. Therefore, the temperature of the refrigerant flowing into the first dehumidification valve 201 is higher. As a result, the opening degree of the first electronic expansion valve of the first dehumidification valve 201 is smaller than the opening degree of the second electronic expansion valve, which can improve the throttling effect of the first dehumidification valve 201.

[0099] Optionally, such as Figures 7 to 8 As shown, the indoor heat exchanger also includes a liquid storage tank 60, which is located upstream of the dehumidification valve.

[0100] In this embodiment, the liquid storage tank 60 is located upstream of the dehumidification valve. When the refrigerant flows from the first end to the second end of the first heat exchange tube assembly, and the dehumidification valve is open, the indoor heat exchanger operates in reheat dehumidification mode. The liquid storage tank 60 can store the liquid refrigerant upstream of the dehumidification valve, reducing the proportion of liquid refrigerant in the indoor heat exchanger and increasing the proportion of two-phase refrigerant, thereby improving the efficiency of the indoor heat exchanger. Furthermore, the liquid storage tank 60 can reduce the burden on the dehumidification valve, providing a stable flow of liquid refrigerant and reducing the amount of refrigerant the dehumidification valve needs to handle.

[0101] Optionally, when the refrigerant flows from the first end of the first heat exchange tube group 10 to the second end of the first heat exchange tube group 10, at least two heat exchange channels are connected in series. The refrigerant flows from the first end of the first heat exchange tube group 10 to the second end of the first heat exchange tube group 10. The dehumidification valve is located between the at least two heat exchange channels, and the liquid storage tank 60 is located on the side of the dehumidification valve facing the first end of the first heat exchange tube group 10.

[0102] In this embodiment of the present disclosure, the liquid storage tank 60 is located on the side of the dehumidification valve facing the first end of the first heat exchange tube group 10. In this way, when the refrigerant flows from the first end of the first heat exchange tube group 10 to the second end of the first heat exchange tube group 10, the high temperature and high pressure refrigerant condenses and dissipates heat in the heat exchange channel upstream of the dehumidification valve, and the liquid refrigerant can flow into the liquid storage tank 60, and then flow from the liquid storage tank 60 to the dehumidification valve. The liquid storage tank 60 can store excess liquid refrigerant.

[0103] Optionally, the liquid storage tank 60 is located between the outlet of the condensing reheat section and the dehumidification valve. This ensures that the liquid flowing into the liquid storage tank 60 is the liquid refrigerant after condensation and heat dissipation in the condensing reheat section, thus guaranteeing the condensation effect.

[0104] Optionally, the indoor heat exchanger also includes a gas-liquid separator 70, which is located on the side of the dehumidification valve facing the second end of the first heat exchange tube group 10. The gas outlet of the gas-liquid separator 70 is adapted to be connected to the throttling device 50, and the liquid outlet of the gas-liquid separator 70 is connected to the first heat exchange tube group 10.

[0105] In this embodiment of the present disclosure, a gas-liquid separator 70 is added downstream of the dehumidification valve, that is, after the dehumidification valve. In this way, when the indoor heat exchanger is in reheat dehumidification mode, the gaseous refrigerant is sent to the outlet of the second end of the indoor heat exchanger, and the liquid refrigerant enters the heat exchange channel. This avoids excess gaseous refrigerant occupying the indoor heat exchanger, reduces the dryness of the refrigerant entering the indoor heat exchanger, improves heat exchange efficiency, and enhances the dehumidification effect.

[0106] Optionally, when there are multiple dehumidification valves, the number of liquid storage tanks 60 is the same as the number of dehumidification valves and they correspond one-to-one.

[0107] In this embodiment of the present disclosure, each dehumidifier valve is provided with a corresponding liquid storage tank 60, which can ensure stable throttling of each dehumidifier valve and increase the proportion of two-phase refrigerant in the branch where each dehumidifier valve is located, thereby improving heat exchange efficiency.

[0108] In some alternative embodiments, such as Figures 4 to 6 As shown, multiple heat exchange channels also form a second heat exchange tube group 40. The first heat exchange tube group 10 is connected to the second heat exchange tube group 40. A flow-diverting component is disposed within the first heat exchange tube group 10. The flow-diverting component enables the multiple heat exchange channels of the first heat exchange tube group 10 to be connected in series when the refrigerant flows from the first end to the second end of the first heat exchange tube group 10, and to be connected in parallel when the refrigerant flows from the second end to the first end of the first heat exchange tube group 10. A dehumidification valve (hereinafter referred to as the third dehumidification valve 203 for ease of distinction) is disposed within the second heat exchange tube group 40, or between the first heat exchange tube group 10 and the second heat exchange tube group 40, to throttle the refrigerant so that the temperature of the refrigerant downstream of the third dehumidification valve 203 is lower than the temperature of the refrigerant upstream of the third dehumidification valve 203.

[0109] In this embodiment, the first heat exchanger tube assembly 10 is equipped with a flow-diverting component. This allows the first heat exchanger tube assembly 10 to switch not only the refrigerant flow direction but also the refrigerant flow path during the switching between cooling and heating modes. When the refrigerant flows from the second end to the first end of the first heat exchanger tube assembly, it passes through more branches, effectively reducing the pressure drop along the flow path and improving heat exchange efficiency. When the refrigerant flows from the first end to the second end of the first heat exchanger tube assembly 10, the flow path becomes longer, the flow branches become shorter, the flow velocity increases, and circulation is improved, increasing the heat transfer coefficient inside the tubes and further improving heat exchange efficiency. The first heat exchanger tube assembly 10, through the flow-diverting component, achieves multiple branches for evaporation and fewer branches for condensation, thereby improving the energy efficiency of the air conditioner. In addition, a third dehumidification valve 203 is provided inside the second heat exchange tube group 40 or between the first heat exchange tube group 10 and the second heat exchange tube group 40. In this way, the first heat exchange tube group 10 and the second heat exchange tube group 40 can form different temperature ranges through the third dehumidification valve 203, thereby achieving dehumidification. In this way, the air conditioner can maintain energy efficiency while dehumidifying and switching between cooling and heating modes.

[0110] Optionally, when the third dehumidification valve 203 is opened for throttling, the first dehumidification valve 201 and the second dehumidification valve 202 can be fully opened without throttling, or they can be partially opened for throttling.

[0111] Optionally, the heat exchange tube assembly further includes a connecting pipe 402, which connects the second end of the first heat exchange tube assembly 10 and the first end of the second heat exchange tube assembly 40, wherein the third dehumidification valve 203 is disposed in the connecting pipe 402.

[0112] In this embodiment of the present disclosure, the third dehumidification valve 203 is provided in the connecting pipe 402. The third dehumidification valve 203 can throttle the refrigerant flowing from the first heat exchange tube group 10 to the second heat exchange tube group 40, and can also throttle the refrigerant flowing from the second heat exchange tube group 40 to the first heat exchange tube group 10.

[0113] Optionally, the first end of the first heat exchanger tube assembly 10 is adapted to be connected to the compressor, the first end of the second heat exchanger tube assembly 40 is connected to the second end of the first heat exchanger tube assembly 10, and the second end of the second heat exchanger tube assembly 40 is adapted to be connected to the outdoor unit.

[0114] In this embodiment, when the refrigerant flows from the first end of the first heat exchanger tube group 10 to the second end of the first heat exchanger tube group 10, the high-temperature refrigerant flows from the first heat exchanger tube group 10 into the second heat exchanger tube group 40. Specifically, the high-temperature refrigerant flows sequentially through multiple heat exchange channels connected in series in the first heat exchanger tube group 10. The first dehumidification valve 201 and the second dehumidification valve 202 are fully open without throttling. Then, it can pass through the third dehumidification valve 203 for throttling and cooling before flowing into the second heat exchanger tube group 40, and then from the second heat exchanger tube group 40 into the outdoor unit. In this way, the temperature of the first heat exchanger tube group 10 is higher than that of the second heat exchanger tube group 40. The airflow can first flow through the first heat exchanger tube group 10 and then through the second heat exchanger tube group 40, or first flow through the second heat exchanger tube group 40 and then through the first heat exchanger tube group 10. This not only achieves reheat dehumidification but also does not affect the refrigerant flow in the first heat exchanger tube group 10, ensuring the condensation effect and the normal operation of the air conditioner. When the refrigerant flows from the first end of the first heat exchanger tube group 10 to the second end of the first heat exchanger tube group 10, at least one of the first dehumidification valve and the second dehumidification valve can be opened to throttle the flow. In this way, the high-temperature refrigerant flows out of the indoor heat exchanger after multiple throttling operations, which enables multiple different temperature ranges to be formed in the first heat exchanger tube group. The temperature of the second heat exchanger tube group is also lower than that of the first heat exchanger tube group, thereby achieving deep dehumidification while heating.

[0115] Refrigerant flows from the second heat exchanger assembly 40 to the first heat exchanger assembly 10. The refrigerant flowing out of the second heat exchanger assembly 40 is throttled by the third dehumidification valve 203 before flowing back into the first heat exchanger assembly 10. Both the first and second dehumidification valves are fully open without throttling. This results in the temperature of the second heat exchanger assembly 40 being higher than that of the first heat exchanger assembly 10. Thus, the first heat exchanger assembly 10 acts as the cooling and dehumidification section, and the second heat exchanger assembly 40 acts as the heating section, achieving cooling, dehumidification, and reheating. It can be understood that at least one of the first and second dehumidification valves can be open for throttling, enabling deep cooling followed by reheating. The third dehumidification valve can be understood as a throttling device in the air conditioning system.

[0116] Optionally, the ratio of the area of ​​the second heat exchange tube group 40 to the area of ​​the first heat exchange tube group 10 is in the range of 1 / 2-3, or the ratio of the area of ​​the second heat exchange tube group 40 to the area of ​​the first heat exchange tube group 10 is in the range of 1 / 2-2.

[0117] In this embodiment, when the ratio of the area of ​​the first heat exchanger tube group 10 to the area of ​​the indoor heat exchanger is less than 1 / 3, the area of ​​the first heat exchanger tube group 10 is too small, which will lead to incomplete refrigerant condensation. When passing through the third dehumidification valve 203, the refrigerant will be in a two-phase state. This two-phase state causes cold impact on the valve core, resulting in very high noise, significant throttling energy loss, and affecting the normal operation of the refrigerant circuit. When the ratio of the area of ​​the first heat exchanger tube group 10 to the area of ​​the indoor heat exchanger is greater than 3 / 4, the area of ​​the second heat exchanger tube group 40 is too small, and the dehumidification effect is not significant. The ratio of the area of ​​the first heat exchanger tube group 10 to the area of ​​the indoor heat exchanger is in the range of 1 / 3-3 / 4. This ensures sufficient refrigerant condensation, with the refrigerant completely becoming liquid, or even subcooled, which is beneficial for dehumidification and reduces noise.

[0118] Optionally, the ratio of the area of ​​the first heat exchange tube group 10 to the area of ​​the indoor heat exchanger is in the range of 1 / 3 to 2 / 3.

[0119] In this embodiment, the ratio of the area of ​​the first heat exchange tube group 10 to the area of ​​the indoor heat exchanger is further reduced to the range of 1 / 3-2 / 3, which can ensure the uniformity of refrigerant flow in the indoor heat exchanger, maximize the efficiency of refrigerant condensation, and ensure the dehumidification effect of the second heat exchange tube group 40.

[0120] For example, the ratio of the area of ​​the first heat exchange tube group 10 to the area of ​​the indoor heat exchanger is 1 / 3, 1 / 2, 2 / 3, or 3 / 4, etc.

[0121] Optionally, there is an angle between adjacent heat exchange channels, and the indoor heat exchanger matches the internal structure of the indoor unit. This makes the structure of the indoor heat exchanger more compact and easier to install inside the indoor unit.

[0122] Optionally, the indoor unit includes an indoor heat exchanger, a housing, and a fan. The housing defines a receiving cavity with an air inlet and an air outlet, and the indoor heat exchanger is located within the receiving cavity. The fan is located within the receiving cavity and can drive airflow to flow sequentially through the first heat exchange channel 101, the second heat exchange channel 102, and the third heat exchange channel 103.

[0123] In this embodiment, the fan drives airflow sequentially through the first heat exchange channel 101, the second heat exchange channel 102, and the third heat exchange channel 103, thereby enabling the airflow passing through the heat exchanger to regulate temperature while dehumidifying, thus meeting different temperature regulation requirements. In this way, when the refrigerant flows from the first end to the second end of the indoor heat exchanger, the indoor heat exchanger can perform reheat dehumidification. When the refrigerant flows from the second end to the first end of the indoor heat exchanger, the indoor heat exchanger can perform cooling or deep dehumidification.

[0124] Optionally, when the indoor heat exchanger includes a fourth heat exchange channel 104, the fan can drive airflow to sequentially pass through the first heat exchange channel 101, the second heat exchange channel 102, the third heat exchange channel 103, and the fourth heat exchange channel 104. Thus, when the refrigerant flows from the first end to the second end of the heat exchanger, the heat exchanger can achieve reheat dehumidification. When the refrigerant flows from the second end to the first end of the heat exchanger, the heat exchanger can achieve cooling, dehumidification, and reheat.

[0125] Optionally, the outdoor unit includes an outdoor heat exchanger, which is a variable flow heat exchanger.

[0126] Optionally, the air conditioner also includes a controller air conditioner, which is electrically connected to the dehumidification valve and other components of the air conditioner. The controller air conditioner can control the opening degree of the dehumidification valve and the operation of other components of the air conditioner.

[0127] Optionally, the air conditioner also includes a first detection device for detecting indoor temperature and humidity. The first detection device is electrically connected to the controller air conditioner, which can control the operation of the dehumidification valve and other components of the air conditioner based on the indoor temperature and humidity.

[0128] Optionally, such as Figure 9 As shown, when the air conditioner heat exchanger includes a first dehumidification valve and a second dehumidification valve, this disclosure also provides a control method for an air conditioner, including:

[0129] S11. The air conditioner obtains the indoor temperature and humidity.

[0130] S12. Based on the indoor temperature and humidity, the air conditioner controls the opening degree of the first and second dehumidification valves and the refrigerant flow direction of the indoor heat exchanger.

[0131] In this embodiment, the indoor temperature and humidity vary depending on the environment in which the air conditioner is located, and these conditions change in real time. The air conditioner adjusts the opening of the first and second dehumidification valves based on the indoor temperature and humidity, thus creating different temperature ranges in the indoor heat exchanger and achieving varying dehumidification and temperature control effects. Furthermore, it can adjust the refrigerant flow direction according to changes in temperature and humidity, further increasing the temperature range of the indoor heat exchanger and improving its temperature and humidity control effects. The first end of the indoor heat exchanger is the first end of the first heat exchange tube assembly, and the second end of the indoor heat exchanger is the second end of the first heat exchange tube assembly. When the indoor heat exchanger includes a second heat exchange tube assembly, the second end of the indoor heat exchanger is the second end of the second heat exchange tube assembly. The air conditioner controls the operation of the four-way valve to switch the refrigerant flow direction in the refrigerant circuit, thereby changing the refrigerant flow direction in the indoor heat exchanger.

[0132] Optionally, such as Figure 10 As shown in the embodiments of this disclosure, another control method for an air conditioner is also provided, including:

[0133] S21. The air conditioner obtains the indoor temperature and humidity.

[0134] S22. When the indoor temperature is greater than or equal to the first temperature threshold and the indoor humidity is less than the first humidity threshold, the air conditioner controls the refrigerant in the indoor heat exchanger to flow from the second end of the indoor heat exchanger to the first end of the indoor heat exchanger, and controls the first dehumidification valve and the second dehumidification valve to be fully open.

[0135] In this embodiment of the disclosure, when the indoor temperature is high but the humidity is not particularly high, the refrigerant is controlled to flow from the second end of the indoor heat exchanger to the first end of the indoor heat exchanger. In this way, the indoor heat exchanger is filled with refrigerant after being throttled by the throttling device, and the first dehumidifying valve and the second dehumidifying valve are fully open. Thus, the first dehumidifying valve and the second dehumidifying valve do not perform throttling, thereby achieving dehumidification while cooling.

[0136] Optionally, such as Figure 11 As shown in the embodiments of this disclosure, another control method for an air conditioner is also provided, including:

[0137] S31. The air conditioner obtains the indoor temperature and humidity.

[0138] S32. When the indoor temperature is greater than or equal to the first temperature threshold and the indoor humidity is greater than or equal to the first humidity threshold, the air conditioner controls the refrigerant in the indoor heat exchanger to flow from the second end of the indoor heat exchanger to the first end of the indoor heat exchanger, controls the first dehumidification valve to open to the first preset opening degree, and controls the second dehumidification valve to fully open.

[0139] In this embodiment, when both indoor temperature and humidity are high, the air conditioner can enter a deep dehumidification mode. The refrigerant in the indoor heat exchanger flows from the second end to the first end, causing the indoor heat exchanger to cool. At the same time, the second dehumidification valve is fully open without throttling, and then the first dehumidification valve is opened to a certain degree to throttle. In this way, the temperature of the first heat exchange channel is lower than the temperature of the second and third heat exchange channels. The airflow flowing through the indoor heat exchanger first passes through the first heat exchange channel for the first cooling and dehumidification, and then flows through the second and third heat exchange channels for a second dehumidification. This can deeply dehumidify the airflow, improve the dehumidification effect, and ensure the cooling temperature.

[0140] Optionally, when the refrigerant temperature in the first heat exchange channel is less than or equal to the first set temperature, the air conditioner controls the first dehumidification valve to remain open.

[0141] For example, the first set temperature can be 6℃, 6.5℃, 7℃, 7.5℃, 8℃, etc.

[0142] Optionally, such as Figure 12 As shown in the embodiments of this disclosure, another control method for an air conditioner is also provided, including:

[0143] S41. The air conditioner obtains the indoor temperature and humidity.

[0144] S42. When the indoor temperature is greater than or equal to the second temperature threshold and less than the first temperature threshold, and the indoor humidity is greater than or equal to the second humidity threshold, the air conditioner controls the refrigerant in the indoor heat exchanger to flow from the first end of the indoor heat exchanger to the second end of the indoor heat exchanger, controls the first dehumidification valve to open to the second preset opening degree, and controls the second dehumidification valve and the throttling device to be fully open.

[0145] In this embodiment, when the indoor temperature is not particularly high but the humidity is high, constant temperature dehumidification is required. The refrigerant in the indoor heat exchanger flows from the first end to the second end. Then, the first dehumidification valve opens to throttle the flow, making the temperature of the first heat exchange channel higher than the temperatures of the second and third heat exchange channels. The airflow first flows through the first heat exchange channel to heat up, then flows through the second and third heat exchange channels to cool down and dehumidify, thus achieving constant temperature dehumidification. Furthermore, both the second dehumidification valve and the throttling device are open without throttling. This allows the refrigerant, after being throttled by the first dehumidification valve, to exchange heat in the second and third heat exchange channels and then flow back into the outdoor heat exchanger of the outdoor unit, thus achieving refrigerant circulation.

[0146] Optionally, when the temperature of the first heat exchange channel is greater than or equal to the indoor temperature, and the temperature of the second heat exchange channel is less than or equal to the second set temperature, the air conditioner controls the first dehumidification valve to remain open. This ensures the temperature stability of the indoor heat exchanger and maintains the temperature difference between the first and second heat exchange channels, thereby ensuring the dehumidification effect.

[0147] Optionally, the second set temperature is ≤14℃.

[0148] Alternatively, alternatively, such as Figure 13 As shown in the embodiments of this disclosure, another control method for an air conditioner is also provided, including:

[0149] S51, The air conditioner obtains the indoor temperature and humidity.

[0150] S52. When the indoor temperature is less than the second temperature threshold and the indoor humidity is greater than the third humidity threshold, the air conditioner controls the refrigerant in the indoor heat exchanger to flow from the first end of the indoor heat exchanger to the second end of the indoor heat exchanger, controls the first dehumidification valve and the throttling device to be fully open, and controls the second dehumidification valve to be opened to the third preset opening degree.

[0151] In this embodiment, when the indoor temperature is low and the humidity is high, the demand for heating is greater during dehumidification. Therefore, the air conditioner controls the refrigerant to flow from the first end of the indoor heat exchanger to the second end, and controls the first dehumidification valve to not throttle while controlling the second dehumidification valve to throttle. This results in the temperature of the first and second heat exchange channels being higher than that of the third heat exchange channel, leading to a larger condensation and reheat area and a higher airflow temperature before dehumidification through the third heat exchange channel. Simultaneously, the throttling device is fully open, allowing the refrigerant after throttling by the second dehumidification valve to flow directly into the outdoor heat exchanger, thus achieving refrigerant circulation.

[0152] Optionally, when the temperature of the second heat exchange channel is greater than the second temperature threshold and the refrigerant temperature of the third heat exchange channel is less than the third set temperature, the air conditioner controls the second dehumidification valve to remain open. This ensures constant temperature dehumidification after the temperature and humidity are properly adjusted. It also maintains the temperature difference between the second and third heat exchange channels to guarantee the dehumidification effect.

[0153] Optionally, the third set temperature can be 13℃, 13.5℃, 14℃, 14.5℃, 15℃, 15.5℃, etc.

[0154] Optionally, the first humidity threshold, the second humidity threshold, and the third humidity threshold can be the same or different, and the specific values ​​of the first humidity threshold, the second humidity threshold, and the third humidity threshold can be set according to the environment.

[0155] Optionally, when the refrigerant flows from the first end to the second end of the indoor heat exchanger, and a condensation reheat section is formed between the first dehumidification valve and the first end of the indoor heat exchanger, such as... Figure 14 As shown in the embodiments of this disclosure, another control method for an air conditioner is also provided, including:

[0156] S61. The air conditioner obtains the indoor temperature and humidity.

[0157] S62. Based on the indoor temperature and humidity, the air conditioner controls the opening degree of the first and second dehumidification valves and the refrigerant flow direction of the indoor heat exchanger.

[0158] S63, The air conditioner obtains the temperature of the condenser reheat section.

[0159] S64. When the temperature in the condensing reheat section is greater than or equal to the first preset temperature, the air conditioner controls the indoor unit's fan speed to increase.

[0160] In this embodiment, when the refrigerant flows from the first end to the second end of the indoor heat exchanger, the indoor heat exchanger, acting as the condenser in the entire refrigerant circuit, experiences a reduction in condensation heat dissipation area due to the opening of the dehumidification valve. Therefore, the air conditioner obtains the temperature of the condensation reheat section. When the temperature of the condensation reheat section is high, the indoor unit's fan speed is increased to improve the heat dissipation effect of the condensation reheat section, thereby ensuring refrigerant circulation and the normal operation of the air conditioner.

[0161] Optionally, when the temperature in the condensing reheat section is lower than the first preset temperature, the air conditioner controls the indoor unit's fan to maintain the current speed.

[0162] Optionally, after the indoor unit's fan speed reaches the first speed threshold, the control method for the air conditioner further includes: when the temperature of the condensing reheat section is still greater than or equal to the first preset temperature, controlling the indoor unit's fan to reduce its frequency to the first preset frequency.

[0163] In this embodiment of the disclosure, when the fan speed of the indoor unit increases to the maximum, but the temperature of the condensing reheat section is still high, in order to protect the safety of the system, the entire air conditioning system may experience a significant frequency reduction or shutdown. Therefore, the frequency of the indoor unit fan can be reduced, the evaporation effect of the dehumidification section of the indoor heat exchanger can be reduced, and the frequency can be reduced in advance to ensure the safe and stable operation of the system.

[0164] Optionally, the first speed threshold is the maximum speed at which the indoor unit's fan can operate safely.

[0165] Optionally, when the refrigerant flows from the first end to the second end of the indoor heat exchanger, and a condensation reheat section is formed between the first dehumidification valve and the first end of the indoor heat exchanger, such as... Figure 15As shown in the embodiments of this disclosure, another control method for an air conditioner is also provided, including:

[0166] S71, The air conditioner obtains the indoor temperature and humidity.

[0167] S72. Based on the indoor temperature and humidity, the air conditioner controls the opening degree of the first and second dehumidification valves and the refrigerant flow direction of the indoor heat exchanger.

[0168] S73. The air conditioner obtains the compressor's exhaust temperature and / or return temperature.

[0169] S74. When the compressor's exhaust temperature is greater than or equal to the second preset temperature and / or the compressor's return temperature is greater than the third preset temperature, the air conditioner controls the outdoor unit's fan speed to decrease.

[0170] In this embodiment, when the refrigerant flows from the first end to the second end of the indoor heat exchanger, the indoor heat exchanger, acting as the condenser in the entire refrigerant circuit, experiences a reduction in condensation and heat dissipation area due to the opening of the dehumidification valve. This increases the evaporation effect of the outdoor unit, making it prone to return gas overheating and resulting in excessively high exhaust temperatures. The air conditioner can also determine the compressor's load capacity based on the compressor's exhaust temperature and / or return gas temperature. When the compressor's exhaust temperature and / or return gas temperature are too high, it indicates a heavy compressor load. Reducing the outdoor unit's fan speed decreases the evaporation effect of the outdoor heat exchanger, increases its temperature, and consequently reduces the pressure on the compressor and throttling device. This ensures the compressor's operation and prevents damage. Furthermore, it prevents excessively high exhaust temperatures from triggering exhaust protection, leading to significant frequency reduction and shutdown, which would affect dehumidification and ensure the safe and stable operation of the air conditioning system.

[0171] Optionally, if the compressor's exhaust temperature is lower than the second preset temperature and / or the return gas temperature is higher than the third preset temperature, the air conditioner controls the outdoor unit's fan to maintain its speed.

[0172] Optionally, after the outdoor unit's fan speed is reduced to the second speed threshold, the control method for the air conditioner further includes: when the compressor's exhaust temperature is greater than the second preset temperature or the compressor's return temperature is greater than the third preset temperature, the air conditioner controls the outdoor unit's fan to reduce its frequency to the second preset frequency.

[0173] In this embodiment of the disclosure, when the outdoor unit's fan speed drops to the minimum speed or stops rotating, and the compressor's exhaust temperature and / or return air temperature are still high, the air conditioner can control the outdoor unit's fan to also reduce its frequency, thereby reducing the evaporation effect and ensuring the safety of the entire air conditioning system.

[0174] Optionally, during the rainy season when indoor temperature and humidity are both high, the air conditioner switches between reheat dehumidification mode and cooling dehumidification mode based on the indoor temperature and humidity. In reheat dehumidification mode, refrigerant flows from the first end to the second end of the indoor heat exchanger, and the first dehumidification valve and / or the second dehumidification valve are open. In cooling dehumidification mode, refrigerant flows from the second end to the first end of the indoor heat exchanger, and the first and second dehumidification valves can be fully open without throttling, selectively open for throttling, or both open for throttling.

[0175] Optionally, during the humid season, when indoor humidity is high but temperature is relatively comfortable, the air conditioner can operate in reheat and dehumidification mode based on indoor temperature and humidity.

[0176] Optionally, the control method for the air conditioner further includes: after controlling the opening degree of the first dehumidifying valve and the second dehumidifying valve and the refrigerant flow direction of the indoor heat exchanger according to the indoor temperature and humidity, detecting the temperature of the coil of the heat exchange channel downstream of the throttling first dehumidifying valve and / or second dehumidifying valve (hereinafter collectively referred to as dehumidifying valve for ease of description), and controlling the operation of the indoor unit's fan or the opening degree of the dehumidifying valve based on the coil temperature of the heat exchange channel downstream of the dehumidifying valve. When the opening degree of the dehumidifying valve is reduced, the coil temperature of the heat exchange channel downstream of the dehumidifying valve is obtained again. The dehumidification effect and temperature regulation effect of the heat exchanger can be judged based on the coil temperature of the heat exchange channel downstream of the dehumidifying valve. If the coil temperature is not suitable, the opening degree of the dehumidifying valve and the operation of the indoor unit's fan are further controlled to adjust the temperature downstream of the dehumidifying valve. This allows for more precise control of the heat exchanger temperature while meeting the user's requirements for temperature and humidity.

[0177] Optionally, if the coil temperature in the heat exchange channel downstream of the dehumidifier valve exceeds the third temperature threshold, the air conditioner controls the indoor unit's fan speed to decrease. Reducing the indoor unit's fan speed at this time decreases the heat exchange efficiency between the heat exchange channel downstream of the dehumidifier valve and the indoor air, thereby slowing down the temperature rise rate of the heat exchange channel downstream of the dehumidifier valve and further lowering the refrigerant temperature in the heat exchange channel downstream of the dehumidifier valve.

[0178] Optionally, if the coil temperature in the heat exchange channel downstream of the dehumidifier valve is less than or equal to a fourth temperature threshold, the air conditioner controls the dehumidifier valve to increase its opening, where the fourth temperature threshold is less than the third temperature threshold. Increasing the opening of the dehumidifier valve reduces the throttling effect, thereby increasing the temperature of the heat exchange channel downstream of the dehumidifier valve and preventing excessively low temperatures.

[0179] Optionally, when the coil temperature in the heat exchange channel downstream of the dehumidifier valve is greater than a fourth temperature threshold but less than a third temperature threshold, the air conditioner acquires the second indoor humidity. When the difference between the second indoor humidity and the preset humidity is less than the fourth humidity threshold, the air conditioner acquires the coil temperature of the outdoor heat exchanger. Based on the coil temperature of the outdoor heat exchanger, the air conditioner controls the operation of the outdoor unit's fan. When the indoor humidity is less than or equal to the fourth humidity threshold, it indicates that the dehumidification effect is significant, the indoor humidity has decreased, and the desired humidity range has been reached. At this point, the coil temperature of the outdoor heat exchanger is acquired again to determine the operating status of the outdoor heat exchanger and control the operation of the outdoor unit's fan to ensure the normal operation of the air conditioning system.

[0180] Optionally, the air conditioner controls the operation of the outdoor unit's fan based on the coil temperature of the outdoor heat exchanger, including: when the coil temperature of the outdoor heat exchanger is lower than the frosting temperature threshold, the air conditioner controls the outdoor unit's fan speed to decrease. This reduces the evaporation effect of the outdoor heat exchanger, prevents the outdoor heat exchanger from exchanging heat too quickly, retains heat, and prevents the outdoor heat exchanger from frosting due to excessively low temperature.

[0181] Combination Figure 16 As shown, this embodiment of the disclosure provides a control device 90 for an air conditioner, including a processor.

[0182] The device 90 includes a processor 900 and a memory 901. Optionally, the device 90 may further include a communication interface 902 and a bus 903. The processor 900, communication interface 902, and memory 901 can communicate with each other via the bus 903. The communication interface 902 can be used for information transmission. The processor 900 can call logical instructions in the memory 901 to execute the air conditioner control method described in the above embodiment.

[0183] Furthermore, the logic instructions in the aforementioned memory 101 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium.

[0184] The memory 901, as a computer-readable storage medium, can be used to store software programs and computer-executable programs, such as program instructions / modules corresponding to the methods in the embodiments of this disclosure. The processor 900 executes functional applications and data processing by running the program instructions / modules stored in the memory 901, thereby implementing the control method for the air conditioner described above.

[0185] The memory 901 may include a program storage area and a data storage area. The program storage area may store the operating system and application programs required for at least one function; the data storage area may store data created based on the use of the terminal device. Furthermore, the memory 901 may include high-speed random access memory and may also include non-volatile memory.

[0186] Combination Figure 7 As shown, this disclosure provides an air conditioner, which includes an air conditioner body and the aforementioned control device 90 for the air conditioner. The control device 90 is installed on the air conditioner body. The installation relationship described herein is not limited to placement inside the air conditioner body, but also includes installation connections with other components of the air conditioner body, including but not limited to physical connections, electrical connections, or signal transmission connections. Those skilled in the art will understand that the control device 90 for the air conditioner can be adapted to any feasible air conditioner body, thereby realizing other feasible embodiments.

[0187] This disclosure provides a computer-readable storage medium storing computer-executable instructions configured to perform the above-described control method for an air conditioner.

[0188] The technical solutions of this disclosure can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes one or more instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in this disclosure. The aforementioned storage medium can be a non-transitory storage medium, such as a USB flash drive, external hard drive, read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk, etc., and other media capable of storing program code.

[0189] The foregoing description and accompanying drawings fully illustrate embodiments of this disclosure to enable those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, procedural, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the terminology used in this application is for describing embodiments only and is not intended to limit the claims. As used in the description of embodiments and claims, the singular forms “a,” “an,” and “the” are intended to equally include the plural forms unless the context clearly indicates otherwise. Similarly, the term “and / or” as used in this application means including one or more of the associated listed items and all possible combinations thereof. Additionally, when used in this application, the term "comprise" and its variations "comprises" and / or "comprising" refer to the presence of stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. Without further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the process, method, or apparatus that includes said element. In this document, each embodiment may focus on the differences from other embodiments, and similar or identical parts between embodiments can be referred to mutually. For methods, products, etc., disclosed in the embodiments, if they correspond to the method section disclosed in the embodiments, the relevant parts can be referred to the description of the method section.

[0190] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of this disclosure. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0191] The methods and products (including but not limited to devices and equipment) disclosed in the embodiments herein can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For instance, the division of units may be merely a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the shown or discussed units may be through some interfaces, and the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the units may be selected to implement this embodiment according to actual needs. Furthermore, the functional units in the embodiments of this disclosure may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0192] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to embodiments of this disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions marked in the blocks may occur in a different order than that shown in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different blocks may also occur in a different order than disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. Each block in a block diagram and / or flowchart, and combinations of blocks in a block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

Claims

1. A control method for an air conditioner, characterized in that, An air conditioner includes an indoor unit, which includes an indoor heat exchanger. The indoor heat exchanger includes multiple heat exchange channels and a dehumidification valve. The multiple heat exchange channels include a first heat exchange channel, a second heat exchange channel, and a third heat exchange channel arranged sequentially along the airflow direction inside the indoor unit. The dehumidification valve includes a first dehumidification valve and a second dehumidification valve. The first dehumidification valve is connected between the first and second heat exchange channels, and the second dehumidification valve is connected between the second and third heat exchange channels. A first end of the indoor heat exchanger is connected to a compressor, and a second end of the indoor heat exchanger is connected to a throttling device. The multiple heat exchange channels form a first heat exchange tube assembly. When the refrigerant flows from the first end to the second end of the first heat exchange tube assembly, the first, second, and third heat exchange channels are connected in series sequentially along the refrigerant flow direction. When the refrigerant flows from the second end to the first end of the first heat exchange tube assembly, the first, second, and third heat exchange channels are connected in parallel between the first end and the second end of the first heat exchange tube assembly. The method includes: Obtain indoor temperature and humidity; Based on the indoor temperature and humidity, control the opening degree of the first and second dehumidification valves and the refrigerant flow direction of the indoor heat exchanger; The control of the opening degrees of the first and second dehumidification valves and the refrigerant flow direction of the indoor heat exchanger, based on the indoor temperature and humidity, includes: When the indoor temperature is greater than or equal to the first temperature threshold and the indoor humidity is less than the first humidity threshold, the refrigerant in the indoor heat exchanger is controlled to flow from the second end of the indoor heat exchanger to the first end of the indoor heat exchanger, and the first dehumidification valve and the second dehumidification valve are fully opened. When the indoor temperature is greater than or equal to the second temperature threshold and less than the first temperature threshold, and the indoor humidity is greater than or equal to the second humidity threshold, the refrigerant in the indoor heat exchanger is controlled to flow from the first end of the indoor heat exchanger to the second end of the indoor heat exchanger, the first dehumidification valve is controlled to open to the second preset opening degree, and the second dehumidification valve and the throttling device are controlled to be fully open.

2. The method according to claim 1, characterized in that, Based on the indoor temperature and humidity, control the opening degree of the first and second dehumidification valves and the refrigerant flow direction of the indoor heat exchanger, including: When the indoor temperature is greater than or equal to the first temperature threshold and the indoor humidity is greater than or equal to the first humidity threshold, the refrigerant in the indoor heat exchanger is controlled to flow from the second end of the indoor heat exchanger to the first end of the indoor heat exchanger, and the first dehumidification valve is controlled to open to the first preset opening degree, and the second dehumidification valve is controlled to be fully open.

3. The method according to claim 1, characterized in that, Based on the indoor temperature and humidity, control the opening degree of the first and second dehumidification valves and the refrigerant flow direction of the indoor heat exchanger, including: When the indoor temperature is less than the second temperature threshold and the indoor humidity is greater than the third humidity threshold, the refrigerant in the indoor heat exchanger is controlled to flow from the first end of the indoor heat exchanger to the second end of the indoor heat exchanger, the first dehumidification valve and the throttling device are fully opened, and the second dehumidification valve is controlled to open to the third preset opening degree.

4. The method according to any one of claims 1 to 3, characterized in that, When the refrigerant flows from the first end to the second end of the indoor heat exchanger, a condensation reheat section is formed between the first dehumidification valve and the first end of the indoor heat exchanger. After controlling the opening degree of the first and second dehumidification valves and the refrigerant flow direction of the indoor heat exchanger, the method further includes: Obtain the temperature of the condenser reheat section, and / or obtain the compressor's discharge temperature and / or return gas temperature; When the temperature in the condensing reheat section is greater than or equal to the first preset temperature, the fan speed of the indoor unit is increased. If the compressor's exhaust temperature is greater than or equal to the second preset temperature and / or the compressor's return temperature is greater than the third preset temperature, the outdoor unit's fan speed will be reduced.

5. The method according to claim 4, characterized in that, After the indoor unit's fan speed reaches the first speed threshold, the method also includes: When the temperature in the condensing reheat section is still greater than or equal to the first preset temperature, the fan frequency of the indoor unit is reduced to the first preset frequency.

6. The method according to claim 4, characterized in that, After the outdoor unit's fan speed is reduced to the second speed threshold, the method also includes: If the compressor's exhaust temperature is greater than the second preset temperature or the compressor's return temperature is greater than the third preset temperature, the outdoor unit's fan frequency will be reduced to the second preset frequency.

7. A control device for an air conditioner, comprising a processor and a memory storing program instructions, characterized in that, The processor is configured to execute the control method for an air conditioner as described in any one of claims 1 to 6 when running the program instructions.

8. An air conditioner, characterized in that, include: Air conditioner unit; The control device for an air conditioner as described in claim 7 is installed on the air conditioner body.

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