Air conditioning unit control method and device, air conditioning equipment and storage medium

Abstract

The invention relates to an air conditioning unit control method and device, air conditioning equipment and a storage medium. The method comprises the steps that the load state of the air conditioning unit is determined according to the outdoor environment temperature and the working mode of each indoor unit, and when it is determined that the air conditioning unit is in a low-load state, the air conditioning unit is controlled to operate according to a first refrigerant access mode so as to control each indoor unit to only start one heat exchange channel; the first electronic expansion valves between the indoor units are opened, the energy supply output quantity is reduced by reducing heat exchange channels, energy recovery between the different indoor units is achieved by opening the first electronic expansion valves between the different indoor units, and energy output is further reduced; therefore, the problem of excessive energy supply of the air conditioning unit caused by long-term low-frequency operation of the compressor of the air conditioning unit under low load is solved.

Description

Technical Field

[0001] The present application relates to the field of air conditioning technology, and in particular to an air conditioning unit control method, device, air conditioning equipment and storage medium. Background Art

[0002] At present, wall-mounted units and multi-split units can achieve cooling or heating functions in different indoor units at the same time. This type of system uses the same refrigerant pipeline to transport refrigerant, but because of changes in the ambient temperature of the outdoor unit, only adjusting the compressor frequency and the size of the electronic expansion valve to distribute the refrigerant cannot accurately control the refrigerant output, especially when the outdoor ambient temperature reaches above 30°C and the indoor unit is performing the heating function, or when the outdoor ambient temperature is lower than 10°C and the indoor unit is performing the cooling function, the external ambient temperature strengthens the heat exchange of the outdoor condenser, and the compressor runs at a low frequency for a long time under low load conditions, resulting in excessive energy output, poor temperature control effect, and poor comfort. Summary of the invention

[0003] The present application provides an air-conditioning unit control method, device, air-conditioning equipment and storage medium to solve the problem of excessive energy supply to the air-conditioning unit caused by a compressor being in low-frequency operation for a long time under low load.

[0004] In a first aspect, the present application provides an air conditioning unit control method, the method comprising:

[0005] Determine the load state of the air conditioning unit according to the acquired outdoor ambient temperature and the working mode of each indoor unit in the air conditioning unit;

[0006] When the load state of the air-conditioning unit is low load, the air-conditioning unit is controlled to operate according to the first refrigerant path mode, wherein in the first refrigerant path mode, the enabled indoor unit in the air-conditioning unit only enables one heat exchange channel among multiple heat exchange channels connected in parallel, and the first electronic expansion valve between each indoor unit is in an open state.

[0007] Optionally, determining the load state of the air-conditioning unit according to the acquired outdoor ambient temperature and the working mode of each indoor unit in the air-conditioning unit includes:

[0008] When the outdoor ambient temperature is within a preset high temperature range and the number of indoor units in the heating mode is greater than the number of indoor units in the cooling mode, the load state of the air-conditioning unit is determined to be heating low load; or,

[0009] When the outdoor ambient temperature is within a preset low temperature range and the number of indoor units in cooling mode is greater than the number of indoor units in heating mode, the load state of the air-conditioning unit is determined to be cooling low load, wherein the load state includes heating low load and cooling low load.

[0010] Optionally, when the load state of the air-conditioning unit is low load, controlling the air-conditioning unit to operate according to the first refrigerant path mode includes:

[0011] When the load state of the air-conditioning unit is a target low load, a first capacity ratio is determined according to a ratio of energy supply capacity between a first type of indoor unit and a second type of indoor unit, wherein the first type of indoor unit is an indoor unit operating in a target temperature control mode, the second type of indoor unit is an indoor unit operating in a non-target temperature control mode, and when the target low load is the heating low load, the target temperature control mode is the heating mode, and when the target low load is the cooling low load, the target temperature control mode is the cooling mode;

[0012] When the first capacity ratio is greater than a first preset ratio, determining a target frequency according to the sum of energy supply capacities corresponding to the first type of indoor units and compressor parameters;

[0013] When the target frequency is less than a preset frequency, the air conditioning unit is controlled to operate in a first refrigerant path mode.

[0014] Optionally, when the first capacity ratio is greater than a first preset ratio, determining the target frequency according to the sum of energy supply capacities corresponding to the first type of indoor units and compressor parameters includes:

[0015] The target frequency is determined based on the ratio of the total energy supply capacity corresponding to the first type of indoor units to the maximum output cooling capacity of the compressor, and then multiplied by the upper limit of the compressor operating frequency, wherein the compressor parameters include the maximum output cooling capacity of the compressor and the upper limit of the compressor operating frequency.

[0016] Optionally, when the load state of the air-conditioning unit is a target low load, after determining the first capacity ratio according to the ratio of the energy supply capacity between the first type indoor unit and the second type indoor unit, the method further includes:

[0017] When the first capacity ratio is less than or equal to the first preset ratio, or when the first capacity ratio is greater than the first preset ratio and the target frequency is greater than or equal to the preset frequency, the air-conditioning unit is controlled to operate in a second refrigerant path mode, wherein in the second refrigerant path mode, the first electronic expansion valve between each indoor unit in the air-conditioning unit and the second electronic expansion valve connected between the indoor unit and the outdoor unit are in an open state.

[0018] Optionally, when the load state of the air-conditioning unit is low load, after controlling the air-conditioning unit to operate in the first refrigerant path mode, the method further includes:

[0019] When the operating time of the air-conditioning unit in the first refrigerant passage mode reaches a first preset time, the air-conditioning unit is controlled to operate in the third refrigerant passage mode, wherein in the third refrigerant passage mode, the indoor unit in the air-conditioning unit is enabled to switch the on / off state of each heat exchange channel;

[0020] When the operating time of the air-conditioning unit in the third refrigerant passage mode reaches a second preset time, controlling the air-conditioning unit to operate in the first refrigerant passage mode, wherein the second preset time is less than the first preset time;

[0021] When the cumulative operating time of the air-conditioning unit in the first refrigerant path mode reaches a third preset time, the step of determining the load state of the air-conditioning unit according to the acquired outdoor ambient temperature and the working mode of each indoor unit in the air-conditioning unit is re-executed, and when the load state of the air-conditioning unit is low load, the air-conditioning unit is controlled to operate in the first refrigerant path mode, wherein the third preset time is greater than the first preset time.

[0022] Optionally, before determining the load state of the air-conditioning unit according to the acquired outdoor ambient temperature and the working mode of each indoor unit in the air-conditioning unit, the method further includes:

[0023] When the air conditioning unit is turned on, the second capacity ratio is determined according to the ratio between the sum of the energy supply capacities corresponding to the enabled indoor units and the maximum output cooling capacity of the compressor;

[0024] When the second capacity ratio is less than a second preset ratio, controlling the air conditioning unit to operate in a first refrigerant path mode;

[0025] When the operating time of the air-conditioning unit in the first refrigerant path mode reaches a fourth preset time, or the second capacity ratio is greater than or equal to the second preset ratio, the step of determining the load state of the air-conditioning unit based on the acquired outdoor ambient temperature and the working mode of each indoor unit in the air-conditioning unit is executed.

[0026] In a second aspect, an air conditioning unit control device is provided, the device comprising:

[0027] An acquisition module, used to determine the load state of the air-conditioning unit according to the acquired outdoor ambient temperature and the working mode of each indoor unit in the air-conditioning unit;

[0028] A control module is used to control the air-conditioning unit to operate in a first refrigerant path mode when the load state of the air-conditioning unit is low load, wherein in the first refrigerant path mode, the enabled indoor unit in the air-conditioning unit only enables one heat exchange channel among multiple heat exchange channels connected in parallel, and the first electronic expansion valve between each indoor unit is in an open state.

[0029] In a third aspect, an air conditioning device is provided, the air conditioning device comprising an air conditioning unit and the air conditioning unit control device as described above, the air conditioning unit comprising a gas-liquid separator, a four-way valve, at least one compressor, an outdoor unit and a plurality of indoor units, the first end of the gas-liquid separator is connected to the first end of the four-way valve, the second end of the gas-liquid separator is connected to the first end of each compressor, the second end of each compressor is connected to the third end of the four-way valve, the second end of the four-way valve is respectively connected to the input end of the first indoor unit and the input end of the condenser in the outdoor unit, the output end of the condenser is respectively connected to the first end of the first electronic expansion valve and the input end of the second indoor unit through a second electronic expansion valve, the second end of the first electronic expansion valve is connected to the output end of the first indoor unit, the first indoor unit and the second indoor unit are two adjacent different indoor units, a first electronic expansion valve is connected between each of the indoor units, when the second indoor unit is the indoor unit farthest from the first indoor unit among the multiple indoor units, the output end of the second indoor unit is connected to the fourth end of the four-way valve, each of the indoor units comprises a plurality of heat exchange channels connected in parallel, and each of the heat exchange channels comprises a heat exchanger.

[0030] In a fourth aspect, the present application further provides a computer storage medium storing computer executable instructions, wherein the computer executable instructions are used to execute the above-mentioned air conditioning unit control method.

[0031] The above technical solution provided by the embodiment of the present application has the following advantages over the prior art: the method provided by the embodiment of the present application determines the load state of the air-conditioning unit according to the acquired outdoor ambient temperature and the working mode of each indoor unit in the air-conditioning unit; when the load state of the air-conditioning unit is low load, the air-conditioning unit is controlled to operate according to the first refrigerant path mode, wherein, in the first refrigerant path mode, the enabled indoor unit in the air-conditioning unit only enables one heat exchange channel among multiple heat exchange channels connected in parallel, and the first electronic expansion valve between each indoor unit is in an open state.

[0032] Based on the above method, the load state of the air-conditioning unit is determined according to the outdoor ambient temperature and the working mode of each indoor unit. When it is determined that the air-conditioning unit is in a low-load state, the air-conditioning unit is controlled to operate in accordance with the first refrigerant path mode, so as to control each indoor unit to enable only one heat exchange channel, and open the first electronic expansion valve between each indoor unit, thereby reducing the energy output by reducing the heat exchange channel, and realizing energy recovery between different indoor units by opening the first electronic expansion valve between different indoor units, further reducing the energy output, thereby solving the problem of excess energy supply of the air-conditioning unit caused by the compressor of the air-conditioning unit being in low-frequency operation for a long time under low load. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0035] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0036] Figure 1 An application environment diagram of an air conditioning unit control method provided in an embodiment of the present application;

[0037] Figure 2 A schematic diagram of the structure of an air conditioning unit provided in an embodiment of the present application;

[0038] Figure 3 A flow chart of an air conditioning unit control method provided in an embodiment of the present application;

[0039] Figure 4 A flow chart of an air conditioning unit control method provided in an embodiment of the present application;

[0040] Figure 5 A structural block diagram of an air conditioning unit control device provided in an embodiment of the present application;

[0041] Figure 6 A schematic diagram of the internal structure of an air-conditioning device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0043] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0044] Figure 1 FIG. 1 is an application environment diagram of an air conditioning unit control method in an embodiment. Figure 1 The air conditioning unit control method is applied to an air conditioning device, wherein the air conditioning device comprises an air conditioning unit 110 and an air conditioning unit control device 120. Figure 2 As shown, the air conditioning unit 110 includes a gas-liquid separator, a four-way valve, at least one compressor, an outdoor unit and a plurality of indoor units. The first end of the gas-liquid separator is connected to the first end of the four-way valve, the second end of the gas-liquid separator is connected to the first end of each compressor, the second end of each compressor is connected to the third end of the four-way valve, the second end of the four-way valve is respectively connected to the input end of the first indoor unit and the input end of the condenser in the outdoor unit, the output end of the condenser is respectively connected to the first end of the first electronic expansion valve and the input end of the second indoor unit through the second electronic expansion valve, the second end of the first electronic expansion valve is connected to the output end of the first indoor unit, the first indoor unit and the second indoor unit are two adjacent different indoor units, a first electronic expansion valve is connected between each of the indoor units, when the second indoor unit is the indoor unit farthest from the first indoor unit among the multiple indoor units, the output end of the second indoor unit is connected to the fourth end of the four-way valve, each of the indoor units includes a plurality of heat exchange channels connected in parallel, each of the heat exchange channels includes a heat exchanger, and the heat exchanger is implemented by an evaporator, Figure 2 The example in which the indoor unit includes three heat exchange channels is used for illustration. Each heat exchange channel includes an evaporator. The on-off state of the heat exchange channels where evaporator 1 and evaporator 3 are located is controlled by solenoid valve 1, and the on-off state of the heat exchange channel where evaporator 2 is located is controlled by solenoid valve 2.

[0045] In one embodiment, Figure 3FIG. 1 is a flow chart of a control method of an air conditioning unit 110 in an embodiment, referring to FIG. Figure 3 , provides a method for controlling an air conditioning unit 110. This embodiment mainly applies the method to the above Figure 1 Taking the air conditioning unit control device 120 in the example, the air conditioning unit 110 control method specifically includes the following steps:

[0046] Step S210 , determining the load state of the air-conditioning unit 110 according to the acquired outdoor ambient temperature and the working mode of each indoor unit in the air-conditioning unit 110 .

[0047] Specifically, the outdoor ambient temperature can be obtained through a temperature sensor provided on the external unit of the air-conditioning unit 110, or the outdoor ambient temperature of the installation location of the air-conditioning unit 110 can be obtained through the network. The working mode of the indoor unit is divided into a cooling mode or a heating mode. The load state of the air-conditioning unit 110 can be determined in combination with the outdoor ambient temperature and the working mode of each indoor unit. The load state includes low load, high load, normal load, etc. The heating low load indicates that the main body of the air-conditioning unit 110 is in a low load state in the heating mode, and the cooling low load indicates that the main body of the air-conditioning unit 110 is in a low load state in the cooling mode. The main body of the air-conditioning unit 110 is determined by the majority of indoor units in the air-conditioning unit 110 that are in the same working mode. If the working mode of the indoor units of the majority of the air-conditioning unit 110 is the cooling mode, the main body of the air-conditioning unit 110 is the cooling indoor unit; if the working mode of the indoor units of the majority of the air-conditioning unit 110 is the heating mode, the main body of the air-conditioning unit 110 is the heating indoor unit, that is, the number of indoor units operating in the cooling mode is greater than the number of indoor units operating in the heating mode, then the cooling indoor unit is the main body of the air-conditioning unit 110; if the number of indoor units operating in the heating mode is greater than the number of indoor units operating in the cooling mode, then the heating indoor unit is the main body of the air-conditioning unit 110.

[0048] Step S220, when the load state of the air-conditioning unit 110 is low load, the air-conditioning unit 110 is controlled to operate according to the first refrigerant path mode, wherein in the first refrigerant path mode, the enabled indoor unit in the air-conditioning unit 110 only enables one heat exchange channel among multiple heat exchange channels connected in parallel, and the first electronic expansion valve between each indoor unit is in an open state.

[0049] Specifically, the first electronic expansion valve is Figure 2The electronic expansion valve 1 in the air-conditioning unit 110 is in a low-load state. The compressor of the air-conditioning unit 110 will still output more energy when operating in the low-load state, that is, it will cause excess energy supply. In order to avoid excess energy supply, the heat exchange channels of each enabled indoor unit are reduced, that is, the enabled indoor unit only uses one heat exchange channel, and the heat exchange energy supply is reduced by reducing the heat exchange channels. In addition, the first electronic expansion valve between each indoor unit is opened, and energy recovery between different indoor units is achieved by opening the first electronic expansion valve between different indoor units, further reducing the output of energy, thereby solving the problem that the compressor of the air-conditioning unit 110 is in low-frequency operation for a long time under low load, resulting in excess energy supply of the air-conditioning unit 110.

[0050] In one embodiment, the load state of the air-conditioning unit 110 is determined according to the acquired outdoor ambient temperature and the working mode of each indoor unit in the air-conditioning unit 110, including:

[0051] When the outdoor ambient temperature is within a preset high temperature range and the number of indoor units in the heating mode is greater than the number of indoor units in the cooling mode, the load state of the air-conditioning unit 110 is determined to be heating low load; or,

[0052] When the outdoor ambient temperature is within the preset low temperature range and the number of indoor units in the cooling mode is greater than the number of indoor units in the heating mode, the load state of the air-conditioning unit 110 is determined to be cooling low load, wherein the load state includes the heating low load and cooling low load.

[0053] Specifically, the preset high temperature range can be 30±A℃, where A is an arbitrary value. If the outdoor ambient temperature is within the preset high temperature range, and the number of indoor units in heating mode is greater than the number of indoor units in cooling mode, that is, the main body of the air-conditioning unit 110 is in heating mode, indicating that the indoor scene may be an incubation room, steam room, baking room, etc., which require indoor heating when the outdoor temperature is high. Since the outdoor temperature is high, heat energy can be transferred to the indoor room. At this time, less energy is required for heating the indoor room. Therefore, the load state of the air-conditioning unit 110 is determined to be low heating load.

[0054] The preset low temperature range can be specifically 10±B℃, where B is an arbitrary value. If the outdoor ambient temperature is within the preset low temperature range, and the number of indoor units in cooling mode is greater than the number of indoor units in heating mode, that is, the main body of the air-conditioning unit 110 is in cooling mode, indicating that the indoor scene may be a kitchen, a hot pot restaurant, etc., which requires indoor cooling when the outdoor temperature is low. Since the outdoor temperature is low, cold energy can be transferred to the indoor room. At this time, less energy is required for indoor cooling. Therefore, the load state of the air-conditioning unit 110 is determined to be low cooling load.

[0055] In one embodiment, referring to Figure 4 When the load state of the air-conditioning unit 110 is low load, controlling the air-conditioning unit 110 to operate according to the first refrigerant path mode includes:

[0056] When the load state of the air-conditioning unit 110 is a target low load, a first capacity ratio is determined according to a ratio of energy supply capacity between the first type indoor unit and the second type indoor unit, wherein the first type indoor unit is an indoor unit operating in a target temperature control mode, the second type indoor unit is an indoor unit operating in a non-target temperature control mode, and when the target low load is the heating low load, the target temperature control mode is the heating mode, and when the target low load is the cooling low load, the target temperature control mode is the cooling mode;

[0057] When the first capacity ratio is greater than a first preset ratio, determining a target frequency according to the sum of energy supply capacities corresponding to the first type of indoor units and compressor parameters;

[0058] When the target frequency is less than the preset frequency, the air conditioning unit 110 is controlled to operate in the first refrigerant path mode.

[0059] Specifically, the target low load can be a heating low load or a cooling low load. When the target low load is a heating low load, the first type of indoor unit is an indoor unit operating in a heating mode, and the second type of indoor unit is an indoor unit operating in a cooling mode. At this time, the first capacity ratio Q1=Q1 / Q2 is determined based on the ratio between the total capacity Q1 corresponding to the indoor units operating in the heating mode and the total capacity Q2 corresponding to the indoor units operating in the cooling mode.

[0060] When the target low load is a cooling low load, the first type of indoor unit is an indoor unit operating in cooling mode, and the second type of indoor unit is an indoor unit operating in heating mode. At this time, the first capacity ratio Q1=Q2 / Q1 is determined based on the ratio between the total capacity Q2 corresponding to the indoor units operating in cooling mode and the total capacity Q1 corresponding to the indoor units operating in heating mode.

[0061] The first preset ratio can be any custom value. In this embodiment, the first preset ratio is set to 1.1. When the first capacity ratio is greater than the first preset ratio, that is, Q1>1.1, the target frequency is further determined according to the sum of the energy supply capacity corresponding to the first type of indoor unit and the compressor parameters. The target frequency is recorded as f, and the preset frequency is recorded as f0. The preset frequency can be any custom frequency. In this embodiment, the preset frequency is 35Hz. When the target frequency is less than the preset frequency, it means that the system pressure of the air-conditioning unit 110 is small, then the air-conditioning unit 110 is controlled to operate according to the first refrigerant path mode, that is, the enabled indoor unit only opens one heat exchange channel, thereby reducing the number of enabled heat exchange channels, thereby reducing the heat exchange amount, and then reducing the energy output, so as to avoid the air-conditioning unit 110 outputting excess energy when the compressor runs at a low frequency.

[0062] In one embodiment, when the first capacity ratio is greater than a first preset ratio, determining the target frequency according to the sum of energy supply capacities corresponding to the first type of indoor units and compressor parameters includes:

[0063] The target frequency is determined based on the ratio of the total energy supply capacity corresponding to the first type of indoor units to the maximum output cooling capacity of the compressor, and then multiplied by the upper limit of the compressor operating frequency, wherein the compressor parameters include the maximum output cooling capacity of the compressor and the upper limit of the compressor operating frequency.

[0064] Specifically, the total energy supply capacity corresponding to the first type of indoor unit is recorded as Qi, which can be Q1 or Q2, and the maximum output cooling capacity of the compressor is recorded as Q z , the target frequency is (Qi / Q z )*f z , where f z It is the upper limit of the compressor operating frequency, which is combined with the energy supply capacity of the air-conditioning unit 110 to calculate the system pressure of the air-conditioning unit 110 under the energy supply capacity, that is, the target frequency is used to reflect the system pressure of the air-conditioning unit 110, so as to accurately adjust the refrigerant passage conditions in combination with the system pressure, thereby accurately controlling the refrigerant flow and energy output.

[0065] In one embodiment, when the load state of the air conditioning unit 110 is a target low load, after determining the first capacity ratio according to the ratio of the energy supply capacity between the first type indoor unit and the second type indoor unit, the method further includes:

[0066] When the first capacity ratio is less than or equal to the first preset ratio, or when the first capacity ratio is greater than the first preset ratio and the target frequency is greater than or equal to the preset frequency, the air-conditioning unit 110 is controlled to operate in a second refrigerant path mode, wherein in the second refrigerant path mode, the first electronic expansion valve between each indoor unit in the air-conditioning unit 110 and the second electronic expansion valve connected between the indoor unit and the outdoor unit are in an open state.

[0067] Specifically, the second electronic expansion valve is Figure 2 Electronic expansion valve 2, refer to Figure 4 When the first capacity ratio is less than or equal to the first preset ratio, it indicates that the energy supply capacity of the main body of the air-conditioning unit 110 is small, that is, the energy supply in the target temperature control mode is less than that in the non-target temperature control mode. Assuming that the current target temperature control mode is the heating mode and the non-target temperature control mode is the cooling mode, the current heating capacity of the air-conditioning unit 110 is less than the cooling capacity. In this case, the first electronic expansion valve and the second electronic expansion valve need to be opened at the same time to enable the outdoor unit of the air-conditioning unit 110 and add other indoor units to increase the heat exchange components, thereby increasing the heating capacity, that is, increasing the energy supply in the target temperature control mode, thereby meeting the energy supply demand in the target temperature control mode.

[0068] When the first capacity ratio is greater than the first preset ratio and the target frequency is greater than or equal to the preset frequency, it indicates that the system pressure of the air-conditioning unit 110 is relatively high. At this time, more refrigerant passages need to be opened to reduce the system pressure. Therefore, the first electronic expansion valve and the second electronic expansion valve are opened at the same time, thereby opening more heat exchange channels, that is, opening more refrigerant passages, thereby achieving a pressure relief effect.

[0069] In one embodiment, when the load state of the air conditioning unit 110 is low load, after controlling the air conditioning unit 110 to operate in the first refrigerant path mode, the method further includes:

[0070] When the operating time of the air-conditioning unit 110 in the first refrigerant passage mode reaches a first preset time, the air-conditioning unit 110 is controlled to operate in the third refrigerant passage mode, wherein in the third refrigerant passage mode, the indoor unit in the air-conditioning unit 110 is enabled to switch the on / off state of each heat exchange channel;

[0071] When the operating time of the air-conditioning unit 110 operating in the third refrigerant passage mode reaches a second preset time, controlling the air-conditioning unit 110 to operate in the first refrigerant passage mode, wherein the second preset time is less than the first preset time;

[0072] When the cumulative operating time of the air-conditioning unit 110 in the first refrigerant path mode reaches a third preset time, the step of determining the load state of the air-conditioning unit 110 according to the acquired outdoor ambient temperature and the working mode of each indoor unit in the air-conditioning unit 110 is re-executed, and when the load state of the air-conditioning unit 110 is low load, controlling the air-conditioning unit 110 to operate in the first refrigerant path mode, wherein the third preset time is greater than the first preset time.

[0073] Specifically, the first preset duration can be any custom duration. In this embodiment, the first preset duration is 2 hours. Figure 4 When the air-conditioning unit 110 runs for 2 hours in the first refrigerant path mode, the on-off state of each heat exchange channel of the enabled indoor unit is switched, that is, the heat exchange channel opened in the first refrigerant path mode is closed, and the heat exchange channel closed in the first refrigerant path mode is opened, and the on-off state of each heat exchange channel is switched by controlling the solenoid valve used to control the on-off state of each heat exchange channel in the indoor unit, referring to Figure 2 In the first refrigerant passage mode, the solenoid valve 2 in each indoor unit is opened and the solenoid valve 1 is closed to only enable the heat exchange channel where the evaporator 2 in the indoor unit is located. In the third refrigerant passage mode, the solenoid valve 1 in each indoor unit is opened and the solenoid valve 2 is closed to close the heat exchange channel where the evaporator 2 is located, and the heat exchange channels where the evaporator 1 and evaporator 3 in the indoor unit are located are enabled, thereby making the refrigerant in the heat exchange channel locked in the closed state flow, thereby driving the oil return effect.

[0074] When the operating time of the air-conditioning unit 110 in the third refrigerant path mode reaches the second preset time, the air-conditioning unit 110 is recirculated to operate in the first refrigerant path mode, which is 30 minutes in this embodiment, until the cumulative operating time of the air-conditioning unit 110 in the first refrigerant path mode reaches the third preset time, which is 4 hours in this embodiment, the load state of the air-conditioning unit 110 is determined according to the acquired outdoor ambient temperature and the working mode of each indoor unit in the air-conditioning unit 110. When the load state of the air-conditioning unit 110 is low load, the air-conditioning unit 110 is controlled to operate in the first refrigerant path mode to readjust the activation state of different heat exchange channels in each indoor unit, thereby realizing dynamic adjustment of the refrigerant path in combination with the actual operating load of the air-conditioning unit 110 to avoid excess energy output by the air-conditioning unit 110.

[0075] In one embodiment, before determining the load state of the air-conditioning unit 110 according to the acquired outdoor ambient temperature and the working mode of each indoor unit in the air-conditioning unit 110, the method further includes:

[0076] When the air conditioning unit 110 is turned on, the second capacity ratio is determined according to the ratio between the sum of the energy supply capacities corresponding to the enabled indoor units and the maximum output cooling capacity of the compressor;

[0077] When the second capacity ratio is less than a second preset ratio, controlling the air conditioning unit 110 to operate in a first refrigerant passage mode;

[0078] When the operating time of the air-conditioning unit 110 in the first refrigerant path mode reaches a fourth preset time, or the second capacity ratio is greater than or equal to the second preset ratio, the step of determining the load state of the air-conditioning unit 110 based on the acquired outdoor ambient temperature and the working mode of each indoor unit in the air-conditioning unit 110 is executed.

[0079] Specifically, refer to Figure 4 When the air-conditioning unit 110 is turned on, the second capacity ratio is determined according to the ratio between the sum of the energy supply capacities corresponding to the enabled indoor units and the maximum output cooling capacity of the compressor. The sum of the energy supply capacities corresponding to the enabled indoor units may be the sum of the energy supply capacities corresponding to all heating indoor units and the energy supply capacities corresponding to all refrigeration indoor units, or the sum of the energy supply capacities corresponding to all heating indoor units, or the sum of the energy supply capacities corresponding to all refrigeration indoor units. In this embodiment, the sum of the energy supply capacities corresponding to all heating indoor units and the energy supply capacities corresponding to all refrigeration indoor units is used as the sum of the energy supply capacities corresponding to the enabled indoor units. The sum of the energy supply capacities corresponding to the enabled indoor units is recorded as q, and the second capacity ratio is Q2=q / Q z , when the second capacity ratio is less than the second preset ratio, it means that the operating load at this time is low, then the air-conditioning unit 110 is controlled to operate according to the first refrigerant path mode, that is, only one heat exchange channel in the indoor unit is enabled, to ensure that the refrigerant circulation volume of the entire system of the air-conditioning unit 110 is reduced, the compressor load is reduced, and the compressor frequency can also be increased to ensure the recovery of the system lubricating oil. When the operating time of the air-conditioning unit 110 in the first refrigerant path mode reaches the fourth preset time, or the second capacity ratio is greater than or equal to the second preset ratio, the load state of the air-conditioning unit 110 is re-determined according to the acquired outdoor ambient temperature and the working mode of each indoor unit in the air-conditioning unit 110, so as to dynamically adjust the activation of the refrigerant path in combination with the actual operating load of the air-conditioning unit 110.

[0080] Figure 3 and Figure 4 FIG. 1 is a flow chart of a control method of the air conditioning unit 110 in one embodiment. It should be understood that although Figure 3 and Figure 4The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figure 3 and Figure 4 At least part of the steps may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least part of the sub-steps or stages of other steps.

[0081] In one embodiment, Figure 5 As shown, an air conditioning unit control device 120 is provided, comprising:

[0082] The acquisition module 310 is used to determine the load state of the air-conditioning unit 110 according to the acquired outdoor ambient temperature and the working mode of each indoor unit in the air-conditioning unit 110;

[0083] The control module 320 is used to control the air-conditioning unit 110 to operate in a first refrigerant path mode when the load state of the air-conditioning unit 110 is low load, wherein in the first refrigerant path mode, the enabled indoor unit in the air-conditioning unit 110 only enables one heat exchange channel among multiple heat exchange channels connected in parallel, and the first electronic expansion valve between each indoor unit is in an open state.

[0084] In one embodiment, the acquisition module 310 is further used for:

[0085] When the outdoor ambient temperature is within a preset high temperature range and the number of indoor units in the heating mode is greater than the number of indoor units in the cooling mode, the load state of the air-conditioning unit 110 is determined to be heating low load; or,

[0086] When the outdoor ambient temperature is within the preset low temperature range and the number of indoor units in the cooling mode is greater than the number of indoor units in the heating mode, the load state of the air-conditioning unit 110 is determined to be cooling low load, wherein the load state includes the heating low load and cooling low load.

[0087] In one embodiment, the control module 320 is further configured to:

[0088] When the load state of the air-conditioning unit 110 is a target low load, a first capacity ratio is determined according to a ratio of energy supply capacity between the first type indoor unit and the second type indoor unit, wherein the first type indoor unit is an indoor unit operating in a target temperature control mode, the second type indoor unit is an indoor unit operating in a non-target temperature control mode, and when the target low load is the heating low load, the target temperature control mode is the heating mode, and when the target low load is the cooling low load, the target temperature control mode is the cooling mode;

[0089] When the first capacity ratio is greater than a first preset ratio, determining a target frequency according to the sum of energy supply capacities corresponding to the first type of indoor units and compressor parameters;

[0090] When the target frequency is less than the preset frequency, the air conditioning unit 110 is controlled to operate in the first refrigerant path mode.

[0091] In one embodiment, the control module 320 is further configured to:

[0092] The target frequency is determined based on the ratio of the total energy supply capacity corresponding to the first type of indoor units to the maximum output cooling capacity of the compressor, and then multiplied by the upper limit of the compressor operating frequency, wherein the compressor parameters include the maximum output cooling capacity of the compressor and the upper limit of the compressor operating frequency.

[0093] In one embodiment, the control module 320 is further configured to:

[0094] When the first capacity ratio is less than or equal to the first preset ratio, or when the first capacity ratio is greater than the first preset ratio and the target frequency is greater than or equal to the preset frequency, the air-conditioning unit 110 is controlled to operate in a second refrigerant path mode, wherein in the second refrigerant path mode, the first electronic expansion valve between each indoor unit in the air-conditioning unit 110 and the second electronic expansion valve connected between the indoor unit and the outdoor unit are in an open state.

[0095] In one embodiment, the control module 320 is further configured to:

[0096] When the operating time of the air-conditioning unit 110 in the first refrigerant passage mode reaches a first preset time, the air-conditioning unit 110 is controlled to operate in the third refrigerant passage mode, wherein in the third refrigerant passage mode, the indoor unit in the air-conditioning unit 110 is enabled to switch the on / off state of each heat exchange channel;

[0097] When the operating time of the air-conditioning unit 110 operating in the third refrigerant passage mode reaches a second preset time, controlling the air-conditioning unit 110 to operate in the first refrigerant passage mode, wherein the second preset time is less than the first preset time;

[0098] When the cumulative operating time of the air-conditioning unit 110 in the first refrigerant path mode reaches a third preset time, the step of determining the load state of the air-conditioning unit 110 according to the acquired outdoor ambient temperature and the working mode of each indoor unit in the air-conditioning unit 110 is re-executed, and when the load state of the air-conditioning unit 110 is low load, controlling the air-conditioning unit 110 to operate in the first refrigerant path mode, wherein the third preset time is greater than the first preset time.

[0099] In one embodiment, the control module 320 is further configured to:

[0100] When the air conditioning unit 110 is turned on, the second capacity ratio is determined according to the ratio between the sum of the energy supply capacities corresponding to the enabled indoor units and the maximum output cooling capacity of the compressor;

[0101] When the second capacity ratio is less than a second preset ratio, controlling the air conditioning unit 110 to operate in a first refrigerant passage mode;

[0102] When the operating time of the air-conditioning unit 110 in the first refrigerant path mode reaches a fourth preset time, or the second capacity ratio is greater than or equal to the second preset ratio, the step of determining the load state of the air-conditioning unit 110 based on the acquired outdoor ambient temperature and the working mode of each indoor unit in the air-conditioning unit 110 is executed.

[0103] like Figure 6 As shown, an embodiment of the present application provides an air conditioning device, including a processor 711, a communication interface 712, a memory 713 and a communication bus 714, wherein the processor 711, the communication interface 712, and the memory 713 communicate with each other through the communication bus 714;

[0104] Memory 713, used for storing computer programs;

[0105] The processor 711 is used to implement the air conditioning unit 110 control method provided by any one of the aforementioned method embodiments when executing the program stored in the memory 713.

[0106] Those skilled in the art will understand that Figure 6 The structure shown in the figure is only a block diagram of a part of the structure related to the scheme of the present application, and does not constitute a limitation on the air-conditioning equipment to which the scheme of the present application is applied. The specific air-conditioning equipment may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0107] In one embodiment, the air conditioning unit control device 120 provided in the present application can be implemented in the form of a computer program. The computer program can be Figure 6 The memory of the air conditioning device can store various program modules constituting the air conditioning unit control device 120, for example, Figure 5 The acquisition module 310 and the control module 320 are shown. The computer program composed of various program modules enables the processor to execute the air conditioning unit 110 control method of each embodiment of the present application described in this specification.

[0108] Figure 6 The air conditioning equipment shown can be Figure 5 The acquisition module 310 in the air conditioning unit control device 120 shown determines the load state of the air conditioning unit 110 according to the acquired outdoor ambient temperature and the working mode of each indoor unit in the air conditioning unit 110. The air conditioning device can control the air conditioning unit 110 to operate according to the first refrigerant path mode when the load state of the air conditioning unit 110 is low load through the control module 320, wherein in the first refrigerant path mode, the enabled indoor unit in the air conditioning unit 110 only enables one heat exchange channel among multiple heat exchange channels connected in parallel, and the first electronic expansion valve between each indoor unit is in an open state.

[0109] The embodiment of the present application further provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the air conditioning unit 110 control method provided in any of the aforementioned method embodiments is implemented.

[0110] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0111] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a general hardware platform, and of course, by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the relevant technology can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for enabling an air-conditioning device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiment.

[0112] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative may be used.

[0113] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for controlling an air conditioning unit, characterized in that: The method comprises: Determine the load state of the air conditioning unit according to the acquired outdoor ambient temperature and the working mode of each indoor unit in the air conditioning unit; When the load state of the air-conditioning unit is low load, the air-conditioning unit is controlled to operate according to the first refrigerant path mode, wherein in the first refrigerant path mode, the enabled indoor unit in the air-conditioning unit only enables one heat exchange channel among multiple heat exchange channels connected in parallel, and the first electronic expansion valve between each indoor unit is in an open state.

2. The method according to claim 1, characterized in that Determining the load state of the air-conditioning unit according to the acquired outdoor ambient temperature and the working mode of each indoor unit in the air-conditioning unit includes: When the outdoor ambient temperature is within a preset high temperature range and the number of indoor units in the heating mode is greater than the number of indoor units in the cooling mode, the load state of the air-conditioning unit is determined to be heating low load; or, When the outdoor ambient temperature is within a preset low temperature range and the number of indoor units in cooling mode is greater than the number of indoor units in heating mode, the load state of the air-conditioning unit is determined to be cooling low load, wherein the load state includes heating low load and cooling low load.

3. The method according to claim 2, characterized in that When the load state of the air-conditioning unit is low load, controlling the air-conditioning unit to operate according to the first refrigerant path mode includes: When the load state of the air-conditioning unit is a target low load, a first capacity ratio is determined according to a ratio of energy supply capacity between a first type of indoor unit and a second type of indoor unit, wherein the first type of indoor unit is an indoor unit operating in a target temperature control mode, the second type of indoor unit is an indoor unit operating in a non-target temperature control mode, and when the target low load is the heating low load, the target temperature control mode is the heating mode, and when the target low load is the cooling low load, the target temperature control mode is the cooling mode; When the first capacity ratio is greater than a first preset ratio, determining a target frequency according to the sum of energy supply capacities corresponding to the first type of indoor units and compressor parameters; When the target frequency is less than a preset frequency, the air conditioning unit is controlled to operate in a first refrigerant path mode.

4. The method according to claim 3, characterized in that When the first capacity ratio is greater than a first preset ratio, determining the target frequency according to the sum of energy supply capacities corresponding to the first type of indoor units and compressor parameters includes: The target frequency is determined based on the ratio of the total energy supply capacity corresponding to the first type of indoor units to the maximum output cooling capacity of the compressor, and then multiplied by the upper limit of the compressor operating frequency, wherein the compressor parameters include the maximum output cooling capacity of the compressor and the upper limit of the compressor operating frequency.

5. The method according to claim 3, characterized in that: When the load state of the air-conditioning unit is a target low load, after determining the first capacity ratio according to the ratio of the energy supply capacity between the first type indoor unit and the second type indoor unit, the method further includes: When the first capacity ratio is less than or equal to the first preset ratio, or when the first capacity ratio is greater than the first preset ratio and the target frequency is greater than or equal to the preset frequency, the air-conditioning unit is controlled to operate in a second refrigerant path mode, wherein in the second refrigerant path mode, the first electronic expansion valve between each indoor unit in the air-conditioning unit and the second electronic expansion valve connected between the indoor unit and the outdoor unit are in an open state.

6. The method according to claim 1, characterized in that When the load state of the air conditioning unit is low load, after controlling the air conditioning unit to operate in the first refrigerant path mode, the method further includes: When the operating time of the air-conditioning unit in the first refrigerant passage mode reaches a first preset time, the air-conditioning unit is controlled to operate in the third refrigerant passage mode, wherein in the third refrigerant passage mode, the indoor unit in the air-conditioning unit is enabled to switch the on / off state of each heat exchange channel; When the operating time of the air-conditioning unit in the third refrigerant passage mode reaches a second preset time, controlling the air-conditioning unit to operate in the first refrigerant passage mode, wherein the second preset time is less than the first preset time; When the cumulative operating time of the air-conditioning unit in the first refrigerant path mode reaches a third preset time, the step of determining the load state of the air-conditioning unit based on the acquired outdoor ambient temperature and the working mode of each indoor unit in the air-conditioning unit is re-executed, and when the load state of the air-conditioning unit is low load, the air-conditioning unit is controlled to operate in the first refrigerant path mode, wherein the third preset time is greater than the first preset time.

7. The method according to claim 1, characterized in that Before determining the load state of the air-conditioning unit according to the acquired outdoor ambient temperature and the working mode of each indoor unit in the air-conditioning unit, the method further includes: When the air conditioning unit is turned on, the second capacity ratio is determined according to the ratio between the sum of the energy supply capacities corresponding to the enabled indoor units and the maximum output cooling capacity of the compressor; When the second capacity ratio is less than a second preset ratio, controlling the air conditioning unit to operate in a first refrigerant path mode; When the operating time of the air-conditioning unit in the first refrigerant path mode reaches a fourth preset time, or the second capacity ratio is greater than or equal to the second preset ratio, the step of determining the load state of the air-conditioning unit based on the acquired outdoor ambient temperature and the working mode of each indoor unit in the air-conditioning unit is executed.

8. An air conditioning unit control device, characterized in that: The device comprises: An acquisition module, used to determine the load state of the air-conditioning unit according to the acquired outdoor ambient temperature and the working mode of each indoor unit in the air-conditioning unit; A control module is used to control the air-conditioning unit to operate in a first refrigerant path mode when the load state of the air-conditioning unit is low load, wherein in the first refrigerant path mode, the enabled indoor unit in the air-conditioning unit only enables one heat exchange channel among multiple heat exchange channels connected in parallel, and the first electronic expansion valve between each indoor unit is in an open state.

9. An air conditioning device, characterized in that: The air conditioning equipment comprises an air conditioning unit and an air conditioning unit control device as claimed in claim 8, wherein the air conditioning unit comprises a gas-liquid separator, a four-way valve, at least one compressor, an outdoor unit and a plurality of indoor units, wherein a first end of the gas-liquid separator is connected to a first end of the four-way valve, a second end of the gas-liquid separator is connected to a first end of each compressor, a second end of each compressor is connected to a third end of the four-way valve, a second end of the four-way valve is respectively connected to an input end of a first indoor unit and an input end of a condenser in the outdoor unit, an output end of the condenser is respectively connected to a first end of a first electronic expansion valve and an input end of a second indoor unit through a second electronic expansion valve, a second end of the first electronic expansion valve is connected to an output end of the first indoor unit, the first indoor unit and the second indoor unit are two adjacent different indoor units, a first electronic expansion valve is connected between each of the indoor units, and when the second indoor unit is the indoor unit farthest from the first indoor unit among the plurality of indoor units, the output end of the second indoor unit is connected to a fourth end of the four-way valve, and each of the indoor units comprises a plurality of heat exchange channels connected in parallel, and each of the heat exchange channels comprises a heat exchanger.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

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