Method and device for controlling air conditioner, air conditioner and storage medium

Abstract

The invention relates to the technical field of intelligent household appliances, and discloses a method for controlling an air conditioner, the air conditioner comprises an indoor unit, and the indoor unit comprises a first heat exchanger, a second heat exchanger, a two-position four-way valve and a dehumidification valve. By regulating and controlling the two-position four-way valve, the first heat exchanger and the second heat exchanger can be switched between the series connection state and the parallel connection state. The method comprises the following steps: acquiring an environment temperature; and the state of the two-position four-way valve and the opening degree of the dehumidification valve are regulated and controlled according to the environment temperature. The air conditioner can be adjusted to the proper working mode according to the actual condition of the working environment, and multiple dehumidification modes can be flexibly achieved. The invention further discloses a device for controlling the air conditioner, the air conditioner and a storage medium.

Description

Technical Field

[0001] The present application relates to the technical field of smart home appliances, and to a method and device for controlling an air conditioner, an air conditioner, and a storage medium. Background Art

[0002] The air conditioner achieves heat transfer through the refrigerant, which circulates in the pipeline. The air conditioner can control the direction of heat transfer by changing the refrigerant circulation pipeline, thereby achieving cooling and heating effects. The dehumidification function of the air conditioner is achieved by lowering the temperature and promoting the condensation of water vapor in the air. In addition to the natural dehumidification effect in the cooling mode, in order to achieve a richer and more effective dehumidification function, the air conditioner is usually equipped with a dehumidification mode and a dehumidification valve. However, the air conditioner usually has a double-row heat exchanger, and the dehumidification mode that can be achieved is relatively simple, with only a cooling dehumidification mode and a constant temperature dehumidification mode.

[0003] In the related art, there is a refrigerant circulation system and a method for controlling the dehumidification of an air conditioner using the system. The method controls the refrigerant circulation system according to the indoor ambient temperature, the target initial temperature, the outdoor ambient temperature, the outdoor coil temperature and the air outlet temperature, thereby realizing multiple dehumidification modes including the heating dehumidification mode on the basis of the original cooling dehumidification mode and the constant temperature dehumidification mode. The pipeline includes a first electronic expansion valve, a second electronic expansion valve and a third electronic expansion valve. By adjusting the opening of the first, second and third electronic expansion valves, the switching of multiple dehumidification modes can be realized.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0005] The related technology adjusts the flow rate of the refrigerant by regulating the electronic expansion valve to achieve multiple dehumidification modes. Although multiple dehumidification modes can be achieved, the switching between the multiple dehumidification modes is only achieved by adjusting the opening of the electronic expansion valve, and the execution method is relatively simple. Summary of the invention

[0006] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0007] The embodiments of the present disclosure provide a method and device for controlling an air conditioner, an air conditioner, and a storage medium to solve the technical problem that the dehumidification mode that can be achieved by an air conditioner with a double-row heat exchanger is relatively single and cannot flexibly achieve multiple dehumidification modes.

[0008] In some embodiments, the air conditioner includes an indoor unit, and the indoor unit includes: a first heat exchanger, including a first refrigerant branch pipe and a second refrigerant branch pipe. A second heat exchanger, including a third refrigerant branch pipe and a fourth refrigerant branch pipe. A two-position four-way valve, wherein the first interface is connected to the high-pressure pipe, the second interface is connected to the first refrigerant branch pipe and the third refrigerant branch pipe, the third interface is connected to the second refrigerant branch pipe, and the fourth interface is connected to the low-pressure pipe. When the two-position four-way valve is switched to the first state, the first interface is connected to the second interface, and the third interface is connected to the fourth interface, so that the first heat exchanger and the second heat exchanger are connected in parallel. In the second state of the two-position four-way valve, the first interface is connected to the third interface, so that the first heat exchanger and the second heat exchanger are connected in series. A dehumidification valve is arranged on the first refrigerant branch pipe. The method includes: obtaining the ambient temperature. According to the ambient temperature, the state of the two-position four-way valve and the opening of the dehumidification valve are regulated.

[0009] In some embodiments, the state of the two-position four-way valve and the opening of the dehumidification valve are regulated according to the ambient temperature, including: when Δt>T1, the two-position four-way valve is switched to the first state, and the dehumidification valve is fully opened. When Δt≤T1, the two-position four-way valve is switched to the second state, and the opening of the dehumidification valve is regulated according to the ambient temperature, the outlet temperature and the real-time relative humidity. Wherein, Δt=T-Ts, T is the ambient temperature, Ts is the target temperature set by the user, and T1 is the first threshold.

[0010] In some embodiments, the dehumidification valve opening is regulated according to the ambient temperature, the outlet air temperature and the real-time relative humidity, including: dehumidification valve opening F = f + K (tT) + k (50-RH). Wherein, f is the basic valve opening, t is the outlet air temperature, T is the ambient temperature, RH is the real-time relative humidity value, K is the temperature difference preset coefficient, and k is the humidity difference preset coefficient.

[0011] In some embodiments, when T2<Δt≤T1, the preset temperature difference coefficient K is K1, and the preset humidity difference coefficient k is k1; or, when T3≤Δt≤T2, the preset temperature difference coefficient K is K2, and the preset humidity difference coefficient k is k2; or, when Δt<T3, the preset temperature difference coefficient K is K3, and the preset humidity difference coefficient k is k3. Wherein, T2 is the second threshold, T3 is the third threshold, K1<K2<K3, k1>k2>k3.

[0012] In some embodiments, the method further includes: when the two-position four-way valve is switched to the first state, regulating the electronic expansion valve to throttle; when the two-position four-way valve is switched to the second state, regulating the electronic expansion valve to fully open.

[0013] In some embodiments, the air conditioner outdoor unit further includes a compressor, and the method further includes: when T3≤Δt≤T2, controlling the compressor to operate at a first frequency; or, when Δt<T3, controlling the compressor to operate at a second frequency. Wherein, T2 is the second threshold, T3 is the third threshold, and the first frequency is less than the second frequency.

[0014] In some embodiments, the method further includes: when Δt>T2, the external fan operates at the frequency and wind speed of the cooling mode; or, when Δt≤T2, the external fan stops.

[0015] In some embodiments, the apparatus for controlling an air conditioner comprises a processor and a memory storing program instructions. The processor is configured to execute the above method for controlling an air conditioner when running the program instructions.

[0016] In some embodiments, the air conditioner includes an indoor unit, and the indoor unit includes:

[0017] The first heat exchanger includes a first refrigerant branch pipe and a second refrigerant branch pipe. The second heat exchanger includes a third refrigerant branch pipe and a fourth refrigerant branch pipe. The two-position four-way valve has a first interface connected to a high-pressure pipe, a second interface connected to the first refrigerant branch pipe and a third refrigerant branch pipe, a third interface connected to the second refrigerant branch pipe, and a fourth interface connected to a low-pressure pipe. When the two-position four-way valve is switched to the first state, the first interface is connected to the second interface, and the third interface is connected to the fourth interface, so that the first heat exchanger and the second heat exchanger are connected in parallel. In the second state of the two-position four-way valve, the first interface is connected to the third interface, so that the first heat exchanger and the second heat exchanger are connected in series. The dehumidification valve is arranged on the first refrigerant branch pipe, and is configured to be fully opened when the first heat exchanger and the second heat exchanger are connected in parallel, and the opening degree is adjusted when the first heat exchanger and the second heat exchanger are connected in series.

[0018] In some embodiments, the air conditioner further comprises: a device for controlling the air conditioner as described above, electrically connected to the two-position four-way valve and the dehumidification valve.

[0019] In some embodiments, the storage medium stores program instructions. When the program instructions are executed, the method for controlling the air conditioner as described above is executed.

[0020] The method and device for controlling an air conditioner, the air conditioner, and the storage medium provided by the embodiments of the present disclosure can achieve the following technical effects:

[0021] After entering the dehumidification mode, by adjusting the two-position four-way valve to switch between the first state and the second state, the refrigerant flow path can be changed according to actual needs, and the first heat exchanger and the second heat exchanger can be adjusted to a series or parallel state. When the two-position four-way valve is switched to the first state, the first heat exchanger and the second heat exchanger are connected in parallel, the air conditioner has a better refrigeration effect, and can dehumidify through refrigeration operations. When the two-position four-way valve is switched to the second state, the first heat exchanger and the second heat exchanger are connected in series, and the dehumidification valve is connected in series between the first heat exchanger and the second heat exchanger. This state focuses more on the dehumidification effect, and more precise humidity adjustment can be achieved by adjusting the opening of the dehumidification valve, and a variety of different dehumidification modes can be achieved according to temperature requirements. Compared with the prior art, this solution can switch between the series and parallel states of the first heat exchanger and the second heat exchanger through the two-position four-way valve, and can more flexibly achieve a variety of dehumidification modes.

[0022] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0024] Figure 1-a , Figure 1-b is a schematic diagram of a refrigerant pipeline structure of an indoor unit of an air conditioner provided by an embodiment of the present disclosure;

[0025] Figure 2 is a schematic diagram of a method for controlling an air conditioner provided by an embodiment of the present disclosure;

[0026] Figure 3 is a schematic diagram of another method for controlling an air conditioner provided by an embodiment of the present disclosure;

[0027] Figure 4 is a schematic diagram of a refrigerant flow path provided by an embodiment of the present disclosure;

[0028] Figure 5 is a schematic diagram of another refrigerant flow path provided by an embodiment of the present disclosure;

[0029] Figure 6 is a schematic diagram of another method for controlling an air conditioner provided by an embodiment of the present disclosure;

[0030] Figure 7 is a schematic diagram of another refrigerant flow path provided by an embodiment of the present disclosure;

[0031] Figure 8is a schematic diagram of a device for controlling an air conditioner provided by an embodiment of the present disclosure;

[0032] Fig. 9 It is a schematic diagram of an air conditioner provided in an embodiment of the present disclosure.

[0033] Reference numerals:

[0034] 10: first heat exchanger; 20: second heat exchanger; 30: two-position four-way valve; 40: dehumidification valve; 50: high-pressure pipe; 60: low-pressure pipe;

[0035] 101: first refrigerant branch; 102: second refrigerant branch;

[0036] 201: the third refrigerant branch; 202: the fourth refrigerant branch;

[0037] 301: first interface; 302: second interface; 303: third interface; 304: fourth interface. DETAILED DESCRIPTION

[0038] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0039] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0040] Unless otherwise stated, the term "plurality" means two or more.

[0041] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0042] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0043] The term "correspondence" may refer to an association relationship or a binding relationship. The correspondence between A and B means that there is an association relationship or a binding relationship between A and B.

[0044] There are two common dehumidification modes for air conditioners: conventional cooling mode and independent dehumidification mode. Conventional cooling mode only lowers the temperature, and the water vapor in the air condenses when passing through the heat exchanger. The working principle of independent dehumidification mode is often to reheat the air cooled by the evaporator to the original temperature, and then send it into the room to achieve constant temperature dehumidification.

[0045] At the same time, many air conditioners today, especially cabinet air conditioners, have indoor units that include double-row heat exchangers to achieve better temperature regulation effects. Among the existing air conditioners that include double-row heat exchangers, there are air conditioner structures in which two rows of heat exchangers are connected in parallel, and there are also air conditioner structures in which two rows of evaporators are connected in series. Among them, the air conditioner structure in which two rows of evaporators are connected in parallel is suitable for situations where large flow heat exchange is required, and can increase the total heat exchange area of ​​the heat exchanger; the air conditioner structure in which two rows of evaporators are connected in series is more suitable for situations where high temperature difference heat exchange is required, and can make full use of the temperature difference of the heat medium. Both have their own advantages.

[0046] Combination Figure 1-a , Figure 1-b As shown, an embodiment of the present disclosure provides an air conditioner, including an indoor unit. The indoor unit includes a first heat exchanger 10, a second heat exchanger 20, a two-position four-way valve 30 and a dehumidification valve 40.

[0047] The first heat exchanger 10 includes a first refrigerant branch pipe 101 and a second refrigerant branch pipe 102. The second heat exchanger 20 includes a third refrigerant branch pipe 201 and a fourth refrigerant branch pipe 202. The fourth refrigerant branch pipe 202 is connected to the low-pressure pipe 60.

[0048] The first interface 301 of the two-position four-way valve 30 is connected to the high-pressure pipe 50, the second interface 302 is connected to the first refrigerant branch pipe 101 and the third refrigerant branch pipe 201, the third interface 303 is connected to the second refrigerant branch pipe 102, and the fourth interface 304 is connected to the low-pressure pipe 60. When the two-position four-way valve 30 is switched to the first state, the first interface 301 is connected to the second interface 302, and the third interface 303 is connected to the fourth interface 304, so that the first heat exchanger 10 and the second heat exchanger 20 are connected in parallel. In the second state of the two-position four-way valve 30, the first interface 301 is connected to the third interface 302, so that the first heat exchanger 10 and the second heat exchanger 20 are connected in series.

[0049] Such an indoor unit piping structure can switch the states of the first heat exchanger 10 and the second heat exchanger 20 between series connection and parallel connection by switching the state of the two-position four-way valve 30 to meet different needs.

[0050] The dehumidification valve 40 is provided on the first refrigerant branch pipe 101 and is configured to be fully opened when the first heat exchanger 10 and the second heat exchanger 20 are connected in parallel, and to have its opening adjusted when the first heat exchanger 10 and the second heat exchanger 20 are connected in series.

[0051] The air conditioner further comprises a temperature sensor (not shown in the figure) and a processor (not shown in the figure). The temperature sensor is used to detect the ambient temperature. The processor is used to control the state of the two-position four-way valve 30 and the opening degree of the dehumidification valve 40.

[0052] By using the air conditioner provided by the embodiment of the present disclosure, the series and parallel states of the first heat exchanger and the second heat exchanger can be switched through a two-position four-way valve, so that multiple dehumidification modes can be realized more flexibly.

[0053] In combination with the above-mentioned air conditioner, a method for controlling the air conditioner is provided in an embodiment of the present disclosure.

[0054] Combination Figure 2 As shown, the method provided by the embodiment of the present disclosure includes:

[0055] S101: The processor obtains the ambient temperature.

[0056] The processor has a flexible way of obtaining the ambient temperature. It can obtain the current ambient temperature through a temperature sensor, or it can obtain the ambient temperature from other smart home appliances with a temperature detection function.

[0057] S102, the processor adjusts the state of the two-position four-way valve and the opening of the dehumidification valve according to the ambient temperature.

[0058] In addition to the ambient temperature, the processor can also adjust the state of the two-position four-way valve and the opening of the dehumidification valve according to the target temperature and target humidity currently set for the air conditioner.

[0059] In this way, the air conditioner can be adjusted to a suitable mode according to the actual working environment, and a variety of dehumidification modes can be flexibly implemented.

[0060] Optionally, the processor regulates the state of the two-position four-way valve and the opening of the dehumidification valve according to the ambient temperature, including switching the two-position four-way valve to the first state and opening all the dehumidification valves when Δt>T1; switching the two-position four-way valve to the second state when Δt≤T1, and regulating the opening of the dehumidification valve according to the ambient temperature, the outlet temperature and the real-time relative humidity. Wherein, Δt=T-Ts, T is the ambient temperature, Ts is the target temperature set by the user, and T1 is the first threshold.

[0061] Furthermore, the processor adjusts the opening of the dehumidification valve according to the ambient temperature, the outlet air temperature and the real-time relative humidity, including: the dehumidification valve opening F = f + K (tT) + k (50-RH). Among them, f is the basic valve opening, t is the outlet air temperature, T is the ambient temperature, RH is the real-time relative humidity value, K is the temperature difference preset coefficient, and k is the humidity difference preset coefficient.

[0062] Combination Figure 3 As shown, the embodiment of the present disclosure provides another method for controlling an air conditioner, comprising:

[0063] S201: The processor obtains the ambient temperature.

[0064] S202: The processor determines whether the difference between the ambient temperature and the target temperature set by the user is greater than a first threshold.

[0065] The difference between the ambient temperature and the target temperature set by the user can reflect the current temperature adjustment demand and can be used as a judgment standard. The difference between the ambient temperature and the target temperature set by the user can be represented by Δt. For example, the first threshold can be 2°C or 3°C.

[0066] S203, when the difference between the ambient temperature and the target temperature set by the user is greater than a first threshold, the processor switches the two-position four-way valve to a first state and opens all the dehumidification valves.

[0067] Taking the cooling operation of the air conditioner as an example, when the current cooling demand is large, the processor switches the two-position four-way valve to the first state. At this time, the refrigerant flow path of the indoor unit of the air conditioner is as follows: Figure 4 As shown. At this time, the first heat exchanger and the second heat exchanger are connected in parallel, which can increase the heat exchange area. At this time, the processor opens all the dehumidification valves, the air conditioner has a large cooling capacity, and can achieve rapid cooling. At the same time, this state can also promote the condensation of water vapor in the air by rapidly cooling, achieving the effect of dehumidification.

[0068] For example, the maximum opening of the dehumidification valve ranges from [300, 600]. For example, the opening of the dehumidification valve when it is fully opened can be 480.

[0069] S204, when the difference between the ambient temperature and the target temperature set by the user is less than or equal to the first threshold, the processor switches the two-position four-way valve to the second state, and adjusts the opening of the dehumidification valve according to the ambient temperature, the outlet air temperature and the real-time relative humidity.

[0070] The processor switches the two-position four-way valve to the first state. At this time, the refrigerant flow path of the indoor unit of the air conditioner is as follows: Figure 5At this time, the first heat exchanger and the second heat exchanger are connected in series, and the dehumidification valve is located between the first heat exchanger and the second heat exchanger, which can adjust the flow of the refrigerant through the second heat exchanger, so that the refrigerant evaporates and absorbs heat more at the first heat exchanger, thereby playing a role in adjusting the dehumidification effect.

[0071] Specifically, the processor controls the opening of the dehumidification valve according to the ambient temperature, the outlet air temperature and the real-time relative humidity, and can determine the opening of the dehumidification valve according to the calculation method of F=f+K(tT)+k(50-RH). Among them, F is the opening of the dehumidification valve, f is the basic valve opening, t is the outlet air temperature, T is the ambient temperature, RH is the real-time relative humidity value, K is the temperature difference preset coefficient, and k is the humidity difference preset coefficient.

[0072] By adopting the method for controlling an air conditioner provided in the embodiment of the present disclosure, the opening of the dehumidification valve can be better adjusted, thereby flexibly realizing a variety of dehumidification modes.

[0073] Furthermore, the opening of the dehumidification valve can be adjusted by using different temperature difference preset coefficients K and humidity difference preset coefficients k, thereby regulating the dehumidification effect and realizing a variety of dehumidification modes.

[0074] Combination Figure 6 As shown, the embodiment of the present disclosure provides a method for controlling an air conditioner, comprising:

[0075] S301: The processor obtains the ambient temperature.

[0076] S302: The processor determines whether the difference between the ambient temperature and the target temperature set by the user is greater than a first threshold.

[0077] The first threshold is used to determine whether the cooling demand of the air conditioner needs to be met first.

[0078] S303, when the difference between the ambient temperature and the target temperature set by the user is greater than the first threshold, the processor switches the two-position four-way valve to the first state and opens all the dehumidification valves.

[0079] Since the air conditioner has a dehumidification effect while providing a large cooling effect, this working mode of the air conditioner can be used as the first cooling and dehumidification mode.

[0080] S304: When the difference between the ambient temperature and the target temperature set by the user is less than or equal to the first threshold, the processor switches the two-position four-way valve to the second state.

[0081] S305: The processor further determines whether the difference between the ambient temperature and the target temperature set by the user is greater than a second threshold.

[0082] When the difference between the ambient temperature and the target temperature set by the user is less than or equal to the first threshold, it is considered that the cooling demand of the air conditioner is no longer urgent. In this case, it is necessary to switch to a dehumidification mode with a small cooling effect. Compared with the mode in which the two-position four-way valve is switched to the first state, this dehumidification mode focuses more on the dehumidification effect rather than cooling.

[0083] The second threshold is less than the first threshold. The second threshold is greater than 0 and has a smaller value. When the difference between the ambient temperature and the target temperature set by the user is less than or equal to the first threshold and greater than the second threshold, it can be considered that the air conditioner has completed the cooling operation. For example, the value of the second threshold can be 1°C or 0.5°C.

[0084] S306, when the difference between the ambient temperature and the target temperature set by the user is less than or equal to the first threshold and greater than the second threshold, the processor determines the opening degree of the dehumidification valve F=f+K1(tT)+k1(50-RH). Wherein, f is the basic valve opening degree, t is the air outlet temperature, T is the ambient temperature, RH is the real-time relative humidity value, K1 is the first temperature difference preset coefficient, and k1 is the first humidity difference preset coefficient.

[0085] When the difference between the ambient temperature and the target temperature set by the user is less than or equal to the first threshold and greater than the second threshold, the dehumidification valve can be adjusted in this way to achieve a slight cooling and dehumidification effect. This working mode of the air conditioner can be used as the second cooling and dehumidification mode.

[0086] S307: When the difference between the ambient temperature and the target temperature set by the user is less than or equal to the second threshold, the processor further determines whether the difference between the ambient temperature and the target temperature set by the user is greater than or equal to a third threshold.

[0087] The third threshold value is less than 0, and the absolute value of the third threshold value is small. If the difference between the ambient temperature and the target temperature set by the user is less than the third threshold value, it means that the current ambient temperature is lower than the target temperature set by the user, and the air conditioner needs to adjust the indoor temperature to rise. For example, the values ​​of the third threshold value and the second threshold value are opposite numbers.

[0088] S308, when the difference between the ambient temperature and the target temperature set by the user is less than or equal to the second threshold and greater than or equal to the third threshold, the processor determines the opening degree of the dehumidification valve F=f+K2(tT)+k2(50-RH). Wherein, f is the basic valve opening degree, t is the air outlet temperature, T is the ambient temperature, RH is the real-time relative humidity value, K2 is the second temperature difference preset coefficient, and k2 is the second humidity difference preset coefficient.

[0089] Among them, K2>K1, k2<k1.

[0090] As mentioned above, since the absolute values ​​of the second threshold and the third threshold are both small, when the difference between the ambient temperature and the target temperature set by the user is less than or equal to the second threshold and greater than or equal to the third threshold, it can be considered that the ambient temperature is basically stable at the target temperature set by the user. In this case, the dehumidification effect can be adjusted by adjusting the opening of the dehumidification valve, and the refrigerant flow rate can be adjusted to collaboratively maintain the ambient temperature close to the target temperature set by the user, thereby achieving a constant temperature dehumidification effect.

[0091] This working mode of the air conditioner is the constant temperature dehumidification mode.

[0092] Furthermore, in the constant temperature dehumidification mode, the processor controls the compressor to operate at a first frequency. The first frequency is an optional operating frequency of the compressor of the air conditioner to achieve constant temperature dehumidification.

[0093] S309, when the difference between the ambient temperature and the target temperature set by the user is less than the third threshold, the processor determines the opening degree of the dehumidification valve F=f+K3(tT)+k3(50-RH), where f is the basic valve opening degree, t is the air outlet temperature, T is the ambient temperature, RH is the real-time relative humidity value, K3 is the third temperature difference preset coefficient, and k3 is the third humidity difference preset coefficient.

[0094] The basic valve opening is the dehumidification valve opening that achieves constant temperature dehumidification under the current ambient temperature, which can be obtained through actual situation testing.

[0095] If the difference between the ambient temperature and the target temperature set by the user is less than the third threshold, it means that the temperature adjustment demand changes from cooling and constant temperature to heating. In this case, the refrigerant flow direction is reversed, which is opposite to the original refrigerant flow direction. Figure 7 In this case, the dehumidification effect can be adjusted by adjusting the opening of the dehumidification valve, and the ambient temperature can be increased by adjusting the refrigerant flow rate, thereby achieving the effects of heating and dehumidification at the same time. This working mode of the air conditioner is the heating and dehumidification mode.

[0096] Among them, K3>K2>K1, k3<k2<k1. For example, the value range of K1 is [100,200), the value range of K2 is [200,300), and the value range of K3 is [300,400]. The value range of k1 is (14,20], the value range of k2 is (8,14], and the value range of k3 is [2,8]. For example, K1=120,150,…; K2=220,250,…; K3=320,350,…; k1=16,18,…; k2=10,12,…; k2=4,6,….

[0097] Furthermore, in the heating and dehumidification mode, the processor controls the compressor to operate at a second frequency. The second frequency is an optional operating frequency of the compressor of the air conditioner to achieve a heating effect.

[0098] By adopting the method for controlling the air conditioner provided by the embodiment of the present disclosure, a variety of dehumidification effects including large temperature reduction, small temperature reduction, constant temperature and temperature increase can be achieved, and a variety of dehumidification modes can be achieved more flexibly.

[0099] Furthermore, since the first cooling and dehumidification mode and the second cooling and dehumidification mode need to lower the temperature, while the constant temperature dehumidification mode and the heating and dehumidification mode do not need to lower the temperature, therefore, when the difference between the ambient temperature and the target temperature set by the user is greater than the second threshold, the outdoor fan of the air conditioner operates at the wind speed of the cooling mode; when the difference between the ambient temperature and the target temperature set by the user is less than or equal to the second threshold, the outdoor fan of the air conditioner stops.

[0100] In this way, when the difference between the ambient temperature and the target temperature set by the user is less than or equal to the second threshold, the outdoor fan of the air conditioner stops, which can reduce the heat dissipation of the refrigerant in the outdoor unit and allow more heat to be dissipated in the first heat exchanger, which is conducive to maintaining or increasing the temperature.

[0101] Furthermore, the electronic expansion valve can be regulated to throttle when the two-position four-way valve is switched to the first state, and the electronic expansion valve can be regulated to fully open when the two-position four-way valve is switched to the second state.

[0102] In this way, when the two-position four-way valve is switched to the second state and the first heat exchanger and the second heat exchanger are connected in series, the electronic expansion valve does not limit the flow of the refrigerant, and can provide better cooling or heating effects during the dehumidification process.

[0103] Combination Figure 8 As shown, the embodiment of the present disclosure provides a device 70 for controlling an air conditioner, including a processor 701 and a memory 702. Optionally, the device may also include a communication interface 703 and a bus 704. The processor 701, the communication interface 703, and the memory 702 may communicate with each other through the bus 704. The communication interface 703 may be used for information transmission. The processor 701 may call the logic instructions in the memory 702 to execute the method for controlling the air conditioner of the above embodiment.

[0104] In addition, the logic instructions in the memory 702 described above may be implemented in the form of software functional units and when sold or used as independent products, may be stored in a computer-readable storage medium.

[0105] The memory 702 is a computer-readable storage medium that can be used to store software programs and computer executable programs, such as program instructions / modules corresponding to the method in the embodiment of the present disclosure. The processor 702 executes the function application and data processing by running the program instructions / modules stored in the memory 702, that is, the method for controlling the air conditioner in the above embodiment is implemented.

[0106] The memory 702 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function; the data storage area may store data created according to the use of the terminal device, etc. In addition, the memory 702 may include a high-speed random access memory and may also include a non-volatile memory.

[0107] Combination Fig. 9 As shown, an embodiment of the present disclosure provides an air conditioner. In addition to the structural features of the air conditioner in the above disclosed embodiment, the air conditioner 80 also includes the device 70 for controlling the air conditioner.

[0108] An embodiment of the present disclosure provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured to execute the above-mentioned method for controlling an air conditioner.

[0109] The computer-readable storage medium mentioned above may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0110] The technical solution of the embodiment of the present disclosure can be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in the embodiment of the present disclosure. The aforementioned storage medium may be a non-transient storage medium, including: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program codes, or a transient storage medium.

[0111] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible changes. Unless explicitly required, separate components and functions are optional, and the order of operation may vary. The parts and features of some embodiments may be included in or replace the parts and features of other embodiments. Moreover, the words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and the claims, unless the context clearly indicates, the singular forms of "a", "an" and "the" are intended to include plural forms as well. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of listings containing one or more associated ones. In addition, when used in the present application, the term "comprise" and its variants "comprises" and / or comprising refer to the presence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method or device comprising the elements. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various embodiments may refer to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can refer to the description of the method part.

[0112] Those skilled in the art will appreciate that the units and algorithm steps of each example 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 performed in hardware or software may depend on the specific application and design constraints of the technical solution. The technicians may use different methods for each specific application to implement the described functions, but such implementations should not be considered to exceed the scope of the embodiments of the present disclosure. The technicians may clearly understand that, for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above may refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here.

[0113] In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units can be only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to implement this embodiment. In addition, each functional unit in the embodiment of the present disclosure may be integrated in a processing unit, or each unit may exist physically alone, or two or more units may be integrated in one unit.

[0114] The flowchart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system, method and computer program product according to the embodiment of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. In some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. In the description corresponding to the flowchart and the block diagram in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in a different order from the order disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified functions or actions, or may be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A method for controlling an air conditioner, the air conditioner comprising an indoor unit, characterized in that: The indoor unit comprises: The first heat exchanger includes a first refrigerant branch pipe and a second refrigerant branch pipe; The second heat exchanger includes a third refrigerant branch pipe and a fourth refrigerant branch pipe; A two-position four-way valve, wherein the first interface is connected to the high-pressure pipe, the second interface is connected to the first refrigerant branch pipe and the third refrigerant branch pipe, the third interface is connected to the second refrigerant branch pipe, and the fourth interface is connected to the low-pressure pipe; when the two-position four-way valve is switched to the first state, the first interface is connected to the second interface, and the third interface is connected to the fourth interface, so that the first heat exchanger and the second heat exchanger are connected in parallel; in the second state of the two-position four-way valve, the first interface is connected to the third interface, so that the first heat exchanger and the second heat exchanger are connected in series; A dehumidification valve is arranged on the first refrigerant branch pipe; The method comprises: Get the ambient temperature; According to the ambient temperature, the state of the two-position four-way valve and the opening of the dehumidification valve are adjusted.

2. The method according to claim 1, characterized in that The method of regulating the state of the two-position four-way valve and the opening of the dehumidification valve according to the ambient temperature includes: When Δt>T1, the two-position four-way valve is switched to the first state, and all the dehumidification valves are opened; When Δt≤T1, the two-position four-way valve is switched to the second state, and the opening of the dehumidification valve is adjusted according to the ambient temperature, the outlet air temperature and the real-time relative humidity; Wherein, Δt=T-Ts, T is the ambient temperature, Ts is the target temperature set by the user, and T1 is the first threshold.

3. The method according to claim 2, characterized in that The method of adjusting the opening of the dehumidification valve according to the ambient temperature, the air outlet temperature and the real-time relative humidity includes: Dehumidification valve opening F = f + K (tT) + k (50-RH); Among them, f is the basic valve opening, t is the outlet air temperature, T is the ambient temperature, RH is the real-time relative humidity value, K is the temperature difference preset coefficient, and k is the humidity difference preset coefficient.

4. The method according to claim 3, characterized in that In the case of T2<Δt≤T1, the preset temperature difference coefficient K is K1, and the preset humidity difference coefficient k is k1; or, In the case of T3≤Δt≤T2, the preset temperature difference coefficient K is K2, and the preset humidity difference coefficient k is k2; or, When Δt<T3, the preset temperature difference coefficient K is K3, and the preset humidity difference coefficient k is k3; Wherein, T2 is the second threshold, T3 is the third threshold, K1<K2<K3, k1>k2>k3.

5. The method according to any one of claims 2 to 4, characterized in that: The method further comprises: When the two-position four-way valve is switched to the first state, regulating the throttling of the electronic expansion valve; When the two-position four-way valve is switched to the second state, the electronic expansion valve is regulated to be fully opened.

6. The method according to any one of claims 2 to 5, wherein the air conditioner further comprises an outdoor unit, wherein the outdoor unit is provided with a compressor, wherein: The method further comprises: When T3≤Δt≤T2, the compressor is controlled to operate at the first frequency; or, When Δt<T3, the compressor is controlled to operate at the second frequency; Wherein, T2 is the second threshold, T3 is the third threshold, and the first frequency is less than the second frequency.

7. The method according to claim 6, wherein the outdoor unit is further provided with an outdoor fan, characterized in that: The method further comprises: When Δt>T2, the external fan operates at the frequency and wind speed of the cooling mode; or, When Δt≤T2, the external fan stops.

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

9. An air conditioner, comprising an indoor unit, characterized in that: The indoor unit comprises: The first heat exchanger includes a first refrigerant branch pipe and a second refrigerant branch pipe; The second heat exchanger includes a third refrigerant branch pipe and a fourth refrigerant branch pipe; A two-position four-way valve, wherein the first interface is connected to the high-pressure pipe, the second interface is connected to the first refrigerant branch pipe and the third refrigerant branch pipe, the third interface is connected to the second refrigerant branch pipe, and the fourth interface is connected to the low-pressure pipe; when the two-position four-way valve is switched to the first state, the first interface is connected to the second interface, and the third interface is connected to the fourth interface, so that the first heat exchanger and the second heat exchanger are connected in parallel; in the second state of the two-position four-way valve, the first interface is connected to the third interface, so that the first heat exchanger and the second heat exchanger are connected in series; The dehumidification valve is provided on the first refrigerant branch pipe, and is configured to be fully opened when the first heat exchanger and the second heat exchanger are connected in parallel, and the opening degree is adjusted when the first heat exchanger and the second heat exchanger are connected in series.

10. The air conditioner further comprises: The device for controlling an air conditioner as claimed in claim 8 is connected to a two-position four-way valve and a dehumidification valve.

11. A storage medium storing program instructions, characterized in that: When the program instructions are executed, the method for controlling an air conditioner according to any one of claims 1 to 7 is executed.

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