Control method and device of air conditioning unit, air conditioning system and storage medium

Abstract

The invention relates to a control method and device of an air conditioning unit, an air conditioning system and a computer readable storage medium. The method comprises the steps that an operation control instruction is received, and the air conditioning unit is controlled to operate; in the operation process of the air conditioning unit, operation state parameters of the air conditioning unit are obtained; and under the condition that it is determined that a spraying starting condition is met according to the operation state parameters, a spraying assembly in the air conditioning unit is controlled to operate in a spraying mode so as to spray a fin type heat exchanger in the air conditioning unit. By means of the method, spraying can be conducted on the fin type heat exchanger in time under the condition that the spraying starting condition is met. When the fin heat exchanger frosts, a frost layer can be effectively removed, and the heat exchange efficiency of the fin heat exchanger is recovered; and when the temperature is too high, the temperature of the fin heat exchanger can be reduced through spraying, so that the heat exchange efficiency of the fin heat exchanger is improved. The problem of energy efficiency increase caused by fin state change is solved, and the energy efficiency of the air conditioning unit is improved.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, and in particular to a control method and device for an air conditioning unit, an air conditioning system, and a computer-readable storage medium. Background Art

[0002] With the continuous improvement of living standards and science and technology, people's requirements for temperature control in production and living environments are increasing, which makes the application of air-conditioning units more and more common.

[0003] The air conditioning unit is mainly composed of a compressor, a fin heat exchanger, an electronic expansion valve and a water-side heat exchanger. These components are connected end to end in sequence to form a heat pump circulation loop, thereby realizing the cooling and heating functions of the environment.

[0004] Traditional air conditioning unit control methods mainly rely on preset target temperatures, and adjust cooling and heating operations by detecting ambient temperatures. However, this method often ignores the actual state changes during the operation of the air conditioning unit (for example, frost is generated on the fin heat exchanger when the temperature is too low, and the heat exchange efficiency is reduced when the temperature is too high). When the state of the fin heat exchanger changes, the air conditioning unit needs to consume more energy to maintain the preset target temperature, resulting in unsatisfactory energy efficiency of the air conditioning unit. Summary of the invention

[0005] Based on this, it is necessary to provide a control method, device, air conditioning system and computer-readable storage medium for an air-conditioning unit that can improve the operating energy efficiency of the air-conditioning unit in order to address the above technical problems.

[0006] In a first aspect, the present application provides a control method for an air conditioning unit, comprising:

[0007] Receiving operation control instructions to control the operation of the air conditioning unit;

[0008] During the operation of the air conditioning unit, obtaining the operating status parameters of the air conditioning unit;

[0009] When it is determined according to the operating state parameters that the spray start condition is met, the spray component in the air-conditioning unit is controlled to operate in a spray mode to spray the fin heat exchanger in the air-conditioning unit.

[0010] In one of the embodiments, controlling the operation of the air conditioning unit includes: controlling the heating operation of the air conditioning unit;

[0011] The operating state parameters include: the operating time of the air conditioning unit, the cumulative operating time of the compressor in the air conditioning unit, the fin temperature of the fin heat exchanger, and the outlet water temperature of the outlet water pipeline of the air conditioning unit;

[0012] The method further comprises:

[0013] If the running time of the air-conditioning unit is greater than the preset startup running time, the cumulative running time of the compressor is greater than the preset interval time, the fin temperature is less than or equal to the preset defrost temperature and the water outlet temperature is greater than the preset defrost minimum water outlet temperature, it is determined that the spray start condition is met.

[0014] In one embodiment, after obtaining the operating status parameters of the air-conditioning unit, before controlling the spray assembly in the air-conditioning unit to operate in a spray mode to spray the fin heat exchanger in the air-conditioning unit when it is determined according to the operating status parameters that the spray start condition is met, the method further includes:

[0015] Controlling the heating of the water stored in the water tank of the air conditioning unit; the water tank is connected to the spray assembly.

[0016] In one embodiment, the operating state parameter of the air conditioning unit includes a water temperature parameter of the water tank; and the controlling and heating the water in the water tank of the air conditioning unit includes:

[0017] Controlling the hot water inlet branch to be conductive; the hot water inlet branch is connected to the water tank and the water outlet of the water side heat exchanger of the air conditioning unit;

[0018] When the water storage temperature parameter is greater than the preset heating water outlet temperature, the heating component inside the water tank is controlled to be turned on, and the hot water inlet branch is controlled to be disconnected.

[0019] In one of the embodiments, controlling the operation of the air conditioning unit includes: controlling the cooling operation of the air conditioning unit;

[0020] The operating status parameters include: the ambient dry-bulb temperature and the ambient wet-bulb temperature of the environment in which the air-conditioning unit is located;

[0021] The method further comprises:

[0022] If the ambient dry-bulb temperature is greater than a first preset temperature threshold and the ambient wet-bulb temperature is lower than a second preset temperature threshold, it is determined that the spray start condition is met.

[0023] In one embodiment, the method further comprises:

[0024] The amount of spray water when the spray assembly operates in the spray mode is determined according to the ambient dry-bulb temperature and the ambient wet-bulb temperature.

[0025] In one of the embodiments, when it is determined according to the operating state parameter that the spray start condition is met, after controlling the spray assembly of the air-conditioning unit to operate so as to spray the fin heat exchanger of the air-conditioning unit, the method further includes:

[0026] Obtaining current operating status parameters of the air conditioning unit;

[0027] When it is determined according to the current operating state parameters that the spraying end condition is reached, the spraying component is controlled to stop operating.

[0028] In one of the embodiments, the operating state parameters include: spray duration and fin temperature of the fin heat exchanger;

[0029] The method further comprises:

[0030] If the spraying duration is longer than a preset spraying duration, or if the fin temperature is higher than a preset defrosting end temperature, it is determined that the spraying end condition is met.

[0031] In one of the embodiments, when it is determined according to the operating state parameter that the spray start condition is met, before controlling the spray assembly of the air-conditioning unit to operate to spray the fin heat exchanger of the air-conditioning unit, the method further includes:

[0032] Determine, according to the operating status parameter, a first energy efficiency parameter of the air conditioning unit before the spray assembly sprays;

[0033] After the spraying component of the air-conditioning unit is controlled to operate to spray the fin heat exchanger of the air-conditioning unit when it is determined according to the operating state parameter that the spraying start condition is met, the method further includes:

[0034] Acquire the operating state parameters of the air-conditioning unit, and determine the second energy efficiency parameter of the air-conditioning unit after the spraying component sprays according to the operating state parameters;

[0035] When it is determined that the fin heat exchanger is dirty and clogged according to the first energy efficiency parameter and the second energy efficiency parameter, the spray component is controlled to operate in a cleaning mode to spray and clean the fin heat exchanger of the air-conditioning unit; the spray intensity of the spray component when operating in the cleaning mode is greater than the spray intensity when operating in the spray mode.

[0036] In one embodiment, the method further comprises:

[0037] When it is determined according to the operating state parameters that the spray start condition is met, the water receiving component in the air conditioning unit is controlled to operate, and the water receiving component is used to receive water generated after the fin heat exchanger is sprayed.

[0038] In one embodiment, the operating state parameters include: water volume parameters of a water tank in the air conditioning unit; the water tank is respectively connected to the spray component and the water receiving component;

[0039] The method further comprises:

[0040] When it is determined that the water tank is short of water according to the water volume parameter, the water inlet component in the air-conditioning unit is controlled to open so as to replenish water in the water tank; the water inlet component is connected to the water tank.

[0041] In a second aspect, the present application further provides a control device for an air conditioning unit, comprising:

[0042] An instruction acquisition module, used for receiving operation control instructions to control the operation of the air conditioning unit;

[0043] A parameter monitoring module, used for obtaining the operating status parameters of the air-conditioning unit during the operation of the air-conditioning unit;

[0044] The spray control module is used to control the spray component in the air-conditioning unit to operate in a spray mode to spray the fin heat exchanger in the air-conditioning unit when it is determined according to the operating state parameters that the spray start condition is met.

[0045] In the third aspect, the present application also provides an air-conditioning system, comprising: a controller and an air-conditioning unit electrically connected to the controller; wherein the air-conditioning unit comprises a water tank, a water-side heat exchanger, a controller, a compressor electrically connected to the controller respectively, a fin heat exchanger, an electronic expansion valve and a spray assembly; the passage between the compressor, the fin heat exchanger, the electronic expansion valve and the water-side heat exchanger forms a heat pump circulation loop; the spray assembly is connected to the water tank; the controller is also used to implement the steps of the method as described above.

[0046] In one of the embodiments, the air conditioning unit further comprises a hot water inlet branch, wherein the hot water inlet branch is connected to the water tank and the water outlet end of the water side heat exchanger;

[0047] A heating component and a water temperature detection component electrically connected to the controller are arranged in the water tank.

[0048] In one embodiment, the spray assembly includes a water pump, a spray solenoid valve and a spray structure; the water pump and the spray solenoid valve are electrically connected to the controller; the spray structure is connected to the spray solenoid valve, and the spray solenoid valve is also connected to the water tank through the water pump.

[0049] In one of the embodiments, the air conditioning unit further comprises a water receiving assembly electrically connected to the controller;

[0050] The controller is also used to control the operation of the water receiving component when it is determined according to the operating state parameters that the spraying start condition is met. The water receiving component is used to receive water generated after the fin heat exchanger is sprayed.

[0051] In one embodiment, the water receiving assembly includes a water receiving structure, a stop valve, a filter and a water receiving solenoid valve; the water receiving structure is connected to the water receiving solenoid valve through the stop valve, and the water receiving solenoid valve is also connected to the water tank; the water receiving solenoid valve and the stop valve are both electrically connected to the controller.

[0052] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the following steps are implemented:

[0053] Receiving operation control instructions to control the operation of the air conditioning unit;

[0054] During the operation of the air conditioning unit, obtaining the operating status parameters of the air conditioning unit;

[0055] When it is determined according to the operating state parameters that the spray start condition is met, the spray component in the air-conditioning unit is controlled to operate in a spray mode to spray the fin heat exchanger in the air-conditioning unit.

[0056] The control method, device, air conditioning system and computer-readable storage medium of the air-conditioning unit described above receive operation control instructions to control the operation of the air-conditioning unit; during the operation of the air-conditioning unit, obtain the operation status parameters of the air-conditioning unit; when it is determined according to the operation status parameters that the spray start condition is met, control the spray component in the air-conditioning unit to operate in a spray mode to spray the fin heat exchanger in the air-conditioning unit. As a result, when the fin heat exchanger meets the spray start condition, the spray component can be turned on in time to spray the fin heat exchanger. When the fin heat exchanger is frosted, the frost layer can be effectively removed to restore the heat exchange efficiency of the fin heat exchanger; when the temperature of the fin heat exchanger is too high, the temperature of the fin heat exchanger can be lowered by spraying to improve its heat exchange efficiency. Thereby, the problem of increased energy efficiency caused by the change in the state of the fin heat exchanger is effectively improved, the energy utilization efficiency is improved, and the purpose of improving the energy efficiency of the air-conditioning unit is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0058] FIG1 is a schematic structural diagram of an air conditioning unit in one embodiment;

[0059] FIG2 is a schematic flow chart of a control method for an air conditioning unit according to an embodiment;

[0060] FIG3 is a schematic flow chart of a control method for an air conditioning unit according to another embodiment;

[0061] FIG4 is a schematic flow chart of a control method for an air conditioning unit according to another embodiment;

[0062] FIG5 is a schematic flow chart of a control method for an air conditioning unit according to another embodiment;

[0063] FIG6 is a block diagram of a control device for an air conditioning unit in one embodiment;

[0064] FIG7 is a schematic structural diagram of an air conditioning unit in another embodiment;

[0065] FIG8 is a partial flow chart of a method for controlling an air conditioning unit in one embodiment;

[0066] FIG. 9 is a partial flow chart of a control method for an air conditioning unit in another embodiment. DETAILED DESCRIPTION

[0067] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0068] The control method of the air-conditioning unit provided in the embodiment of the present application can be applied to an air-conditioning system. In one embodiment, the air-conditioning system includes a controller and an air-conditioning unit electrically connected to the controller. Exemplarily, as shown in FIG1 , the air-conditioning unit includes: a compressor 11, a fin heat exchanger 12, an electronic expansion valve 13 and a water-side heat exchanger 14, and the passage between the compressor 11, the fin heat exchanger 12, the electronic expansion valve 13 and the water-side heat exchanger 14 forms a heat pump circulation loop for refrigerant circulation.

[0069] The air conditioning unit further includes a spray assembly 15 , and the fin heat exchanger 12 is arranged within the spray range of the spray assembly 15 . When the spray assembly 15 starts to operate, its spray water can spray the fin heat exchanger 12 .

[0070] The air conditioning unit further comprises a water tank 16 for storing water. The spray assembly 15 is in communication with the water tank 16. When the spray assembly 15 is started and operated, water is taken from the water tank 16 for spraying.

[0071] The compressor 11, the fin heat exchanger 12, the electronic expansion valve 13 and the spray assembly 15 are all electrically connected to the controller. The controller is used to receive operation control instructions to control the operation of the air-conditioning unit; during the operation of the air-conditioning unit, the operation state parameters of the air-conditioning unit are obtained; when it is determined according to the operation state parameters that the spray start condition is met, the spray assembly 15 in the air-conditioning unit is controlled to operate in a spray mode to spray the fin heat exchanger 12 in the air-conditioning unit.

[0072] It can be understood that during the operation of the air-conditioning unit, the controller will also output corresponding signals to control the compressor 11, the electronic expansion valve 13 and the fin heat exchanger 12 to achieve cooling or heating through refrigerant circulation control. In this process, the water-side heat exchanger 14 exchanges heat with the outdoor environment or water source to absorb or release heat during the heating or cooling process.

[0073] In some embodiments, the air conditioning unit further includes a water receiving assembly 17 electrically connected to the controller. The controller is also used to control the operation of the water receiving assembly 17 when it is determined according to the operating state parameters that the spray start condition is met. The water receiving assembly 17 is used to receive water generated after the fin heat exchanger 12 is sprayed. The water receiving assembly 17 is also connected to the water tank 16. After the water receiving assembly 17 is turned on, the water received by it can flow back to the water tank 16.

[0074] In some embodiments, the air conditioning unit further includes a hot water inlet branch 18, which connects the water tank 16 and the water outlet of the water side heat exchanger 14. The hot water inlet branch 18 is electrically connected to the controller, and when the controller controls the hot water inlet branch 18 to be turned on, the hot water at the water outlet of the water side heat exchanger 14 can flow into the water tank 16.

[0075] In some embodiments, the air conditioning unit further comprises a water inlet assembly 191 electrically connected to the controller, and the water inlet assembly 191 is in communication with the water tank 16. When the controller controls the water inlet assembly 191 to be turned on, the water inlet assembly 191 can replenish the water tank 16 with water.

[0076] Therefore, during the operation of the air-conditioning unit, the controller can monitor the operating status of the air-conditioning unit, and when the fin heat exchanger 12 reaches the spray start condition, the spray assembly 15 is promptly turned on to spray the fin heat exchanger 12. When the fin heat exchanger 12 is frosted, the frost layer can be effectively removed to restore the heat exchange efficiency of the fin heat exchanger 12; when the temperature of the fin heat exchanger 12 is too high, the temperature of the fin heat exchanger 12 can be lowered by spraying to improve its heat exchange efficiency. Thereby, the problem of increased energy efficiency caused by the state change of the fin heat exchanger 12 can be effectively improved, the energy utilization efficiency can be improved, and the purpose of improving the energy efficiency of the air-conditioning unit can be achieved.

[0077] In an exemplary embodiment, as shown in FIG2 , a control method for an air conditioning unit is provided, and the method is applied to a controller in an air conditioning system as an example for description, and includes the following steps 202 to 206. Among them:

[0078] Step 202, receiving an operation control instruction to control the operation of the air conditioning unit.

[0079] The operation control instructions received by the controller may come from the user or from a superior control system. The controller may receive the operation control instructions issued by the user in various ways, such as receiving the instructions issued by the user through a remote controller, or obtaining the instructions from a terminal device that is connected to the controller in communication. In this embodiment, the method of receiving the operation instructions is not limited.

[0080] The operation control instructions include cooling operation instructions, heating operation instructions, wind speed adjustment instructions, etc. After receiving the operation control instructions, the controller controls the air-conditioning unit to start operation according to the specific type of the operation control instructions, such as controlling the compressor, expansion valve, fin heat exchanger and other components to start operation, so as to realize cooling mode operation, heating mode operation or wind speed adjustment and other functions.

[0081] Furthermore, when the control unit is turned on, the controller will record the running time of the air-conditioning unit from the start time; at the same time, it will also accumulate the running time of the compressor.

[0082] Step 204: Acquire the operating status parameters of the air-conditioning unit during the operation of the air-conditioning unit.

[0083] The controller can obtain the operating status parameters of the air-conditioning unit in real time, or can obtain the operating status parameters of the air-conditioning unit once every certain period of time.

[0084] The operating state parameters may be set according to actual conditions. For example, the operating state parameters may include internally recorded data such as the operating time of the air-conditioning unit and the cumulative operating time of the compressor; and may also include data that needs to be collected, such as the fin temperature of the fin heat exchanger, the outlet water temperature of the outlet water pipe, the ambient dry bulb temperature, and the ambient wet bulb temperature.

[0085] It can be understood that each device of the air-conditioning unit is also provided with a corresponding state acquisition component, and each state acquisition component is electrically connected to the controller. Exemplarily, a fin temperature sensing package electrically connected to the controller is provided in the fin heat exchanger, and the fin temperature sensing package is used to collect the fin temperature and transmit it to the controller. The water outlet pipeline of the air-conditioning unit is provided with a water outlet temperature sensing package electrically connected to the controller, and the water outlet temperature sensing package is used to collect the water outlet temperature in the water outlet pipeline and transmit it to the controller. The crossbeam of the air-conditioning unit is provided with a first temperature detection component and a second temperature detection component electrically connected to the controller, and the first temperature detection component is used to detect the dry bulb temperature of the environment and output the environmental dry bulb temperature to the controller; the second temperature detection component is used to detect the wet bulb temperature of the environment and output the environmental wet bulb temperature to the controller. It should be noted that in actual implementation, the air-conditioning unit can also include more state acquisition components, and those skilled in the art can set them according to specific circumstances.

[0086] Step 206, when it is determined according to the operating state parameters that the spray start condition is met, the spray assembly in the air-conditioning unit is controlled to operate in a spray mode to spray the fin heat exchanger in the air-conditioning unit.

[0087] During the operation of the air conditioning component, the controller continuously obtains the operating status parameters to determine whether the spray start condition is met according to the operating status parameters. According to the current cooling operation mode or heating operation mode of the air conditioning unit, the spray start condition may include a frost identification and defrosting condition or a high temperature cooling condition.

[0088] When the spray start condition is reached, the performance of the fin heat exchanger is reduced. Therefore, if the judgment result is that the spray start condition is reached, the controller will output the corresponding spray mode control signal to start the spray component to operate in the spray mode. During the spray process, the spray component will take water from the water tank to spray the fin heat exchanger. Therefore, when the fin heat exchanger is frosted, the frost layer can be effectively removed by spraying; when the temperature of the fin heat exchanger is too high, the temperature of the fin heat exchanger can be reduced by spraying.

[0089] The control method of the air-conditioning unit can timely start the spray assembly to spray the fin heat exchanger when the fin heat exchanger reaches the spray start condition. When the fin heat exchanger is frosted, the frost layer can be effectively removed to restore the heat exchange efficiency of the fin heat exchanger; when the temperature of the fin heat exchanger is too high, the temperature of the fin heat exchanger can be lowered by spraying to improve its heat exchange efficiency. Thereby, the problem of increased energy efficiency caused by the change of the state of the fin heat exchanger is effectively improved, the energy utilization efficiency is improved, and the purpose of improving the energy efficiency of the air-conditioning unit is achieved.

[0090] In one embodiment, the step of controlling the operation of the air conditioning unit includes: controlling the heating operation of the air conditioning unit. The operating state parameters specifically include: the operating time of the air conditioning unit, the cumulative operating time of the compressor in the air conditioning unit, the fin temperature of the fin heat exchanger, and the outlet water temperature of the outlet water pipe of the air conditioning unit.

[0091] In this embodiment, the control method of the air-conditioning unit also includes: if the running time of the air-conditioning unit is greater than the preset start-up running time, the cumulative running time of the compressor is greater than the preset interval time, the fin temperature is less than or equal to the preset defrost temperature and the water outlet temperature is greater than the preset defrost minimum water outlet temperature, it is determined that the spray start conditions are met.

[0092] The preset startup operation time is the minimum operation time that the compressor needs to meet when the air conditioner unit starts to operate. In actual applications, the preset startup operation time can be a default time value, or a time value that can be dynamically adjusted according to conditions such as the unit's workload and outdoor temperature.

[0093] The preset interval time may be an empirical value or an experimental value. Usually, when the cumulative running time of the unit reaches this value, frost may occur.

[0094] Regarding the preset minimum defrost outlet water temperature, after the fins are frosted, the air conditioning unit's energy efficiency decreases and the outlet water temperature will decrease. Therefore, when the outlet water temperature drops to a certain level, defrosting is required. The value of the preset minimum defrost outlet water temperature does not need to be limited and can be set based on factors such as the unit's heating capacity, actual needs, and outdoor environmental conditions.

[0095] The fin temperature is an intuitive detection value of the temperature of the outer surface of the fin. Therefore, when it is less than or equal to the preset defrost temperature, it means that the temperature is very low and frost may occur. The value of the preset defrost temperature does not need to be limited and can be set in combination with factors such as the characteristics of the fin material, the outdoor ambient temperature, and the unit operating efficiency.

[0096] In this embodiment, multiple conditions are combined to determine whether the unit is truly frosted. When all conditions are met, it is determined that the frost identification and defrosting conditions are met, that is, the spray start conditions are met. On the one hand, the safe and stable operation of the air-conditioning unit can be ensured; on the other hand, the probability of false spray defrosting caused by judgment based on a single factor can be reduced; on the other hand, when all conditions are met, it means that enough frost has accumulated on the fins and defrosting is required. At this time, defrosting can more effectively remove the frost layer and improve the defrosting efficiency.

[0097] During the heating operation of the air-conditioning unit, in one embodiment, as shown in FIG. 3 , after step 204 and before step 206 , the control method of the air-conditioning unit further includes step 302 .

[0098] Step 302: Control the water storage in the water tank of the heating and air conditioning unit.

[0099] By controlling the water stored in the heating water tank, the temperature of the water stored in the water tank can be increased, so that the spray component can use hot water for spraying. The sprayed hot water can melt the frost layer faster, thereby improving the defrosting efficiency.

[0100] There are various methods for controlling the water stored in the water tank of the heating air conditioning unit. For example, a heating component electrically connected to the controller is provided in the water tank, and step 302 may include: controlling the heating component inside the water tank to turn on to heat the water stored in the water tank.

[0101] In one embodiment, the operating state parameters of the air conditioning unit also include the water temperature parameters of the water tank. It is understood that a water temperature detection component electrically connected to the controller is also provided in the water tank, and the water temperature detection component is used to monitor the temperature in the water tank and transmit the water temperature in the water tank to the controller.

[0102] In this embodiment, step 302 may include:

[0103] Control the conduction of the hot water inlet branch;

[0104] When the water storage temperature parameter is greater than the preset heating water outlet temperature, the hot water inlet branch is controlled to be disconnected, and the heating component inside the water tank is controlled to be turned on.

[0105] Among them, the hot water inlet branch connects the water tank and the water outlet of the water side heat exchanger. When the air conditioner is in heating operation, the water temperature (for example, 45°C) at the water outlet of the water side heat exchanger is usually higher than the water temperature in the water tank. Therefore, by controlling the hot water inlet branch to be connected and connecting the water tank and the water outlet in series, the temperature of the water in the water tank can be quickly increased.

[0106] The preset heating water outlet temperature can be the temperature of the water outlet detected by the temperature sensing package set at the water outlet; it can also be a set fixed value. When the water storage temperature parameter is greater than the preset heating water outlet temperature, it means that the water at the water outlet can no longer further increase the water storage temperature in the water tank. At this time, the heating component inside the water tank is controlled to be turned on, so that the water storage in the water tank can reach a higher temperature, making the water storage temperature more conducive to defrosting.

[0107] At the same time, the hot water inlet branch is controlled to be disconnected. This is because the temperature of the flowing water cannot be stable, so disconnecting the hot water inlet branch can make the water in the water tank reach a higher temperature, which is more conducive to the subsequent defrosting operation and can avoid unnecessary energy consumption and waste of resources.

[0108] In one embodiment, controlling the operation of the air conditioning unit includes: controlling the cooling operation of the air conditioning unit, wherein the operating state parameters include: the ambient dry-bulb temperature and the ambient wet-bulb temperature of the environment in which the air conditioning unit is located.

[0109] In this embodiment, the control method of the air conditioning unit further includes:

[0110] If the ambient dry-bulb temperature is greater than the first preset temperature threshold and the ambient wet-bulb temperature is lower than the second preset temperature threshold, it is determined that the spray start condition is met.

[0111] Among them, the ambient dry-bulb temperature and the ambient wet-bulb temperature can reflect the relative humidity of the current environment. Spraying will only be effective when the relative humidity is low and a certain dry-bulb temperature is met.

[0112] It can be understood that if the ambient dry-bulb temperature is greater than the first preset temperature threshold, it may indicate that the current ambient temperature is relatively high and the fin heat exchanger may require additional cooling measures.

[0113] If the ambient wet bulb temperature is lower than the second preset temperature threshold at the same time, it means that the relative humidity of the current environment is low, that is, the water vapor content in the air is low. Under low relative humidity conditions, the evaporation of the sprayed water will absorb a lot of heat, so it can effectively reduce the temperature of the fins and the surrounding air. Confirm that the high temperature cooling conditions are met at this time.

[0114] In this embodiment, the fins are sprayed under the condition of low relative humidity and a certain dry-bulb temperature. After spraying, the surface of the heat exchanger receives the sprayed water mist, which is fine water droplets. It evaporates on the surface of the fins and takes away heat, thereby reducing the condensation temperature and improving the energy efficiency of the air-conditioning unit.

[0115] In one embodiment, the control method of the air conditioning unit further includes:

[0116] Determine the amount of spray water when the spray assembly operates in spray mode based on the ambient dry bulb temperature and the ambient wet bulb temperature.

[0117] Since the maximum relative humidity of the environment is 100%, when the state parameters of the detected environment are different, the efficiency-enhancing effect of spraying with different water flow rates on the unit is different. Therefore, in this embodiment, the appropriate spray flow rate can be determined according to the ambient dry bulb temperature and the ambient wet bulb temperature to improve the effect of spraying on the energy efficiency of the unit.

[0118] In one embodiment, as shown in FIG. 4 , after step 206 , the control method of the air-conditioning unit further includes steps 402 to 404 .

[0119] Step 402, obtaining the current operating status parameters of the air conditioning unit.

[0120] In actual implementation, after controlling the spraying operation of the spray component, the controller will continue to obtain the operating status parameters of the air-conditioning unit to monitor the operating status of the unit.

[0121] Step 404, when it is determined according to the current operating state parameters that the spraying end condition is reached, the spraying component is controlled to stop operating.

[0122] There is no unique method for determining the spraying end condition based on the current operating state parameters. In one embodiment, the air conditioning unit is in cooling operation, and the operating state parameters include the spraying duration.

[0123] In this embodiment, if the spraying duration is greater than the preset spraying duration, it is determined that the spraying end condition is met.

[0124] The preset spraying duration may be a fixed value set based on comprehensive consideration of factors such as unit performance, environmental conditions, and spraying effects, or an adjustable value set by designers or users based on experience.

[0125] When the spray component is controlled to start running, the controller will also use the spray start time as the timing starting point to record the spray duration. When the spray duration reaches the preset spray duration, the spray effect has been achieved by default, and the unit energy efficiency meets the actual needs. At this time, confirming that the spray end condition has been met and controlling the spray component to end the spray will help avoid unnecessary energy consumption and waste of water resources, while ensuring that the air conditioning unit can continue to operate in an efficient and energy-saving manner.

[0126] In another embodiment, the air conditioner is in heating operation, and the operating state parameters include the spray duration and the fin temperature of the fin heat exchanger. In this embodiment, if the spray duration is greater than the preset spray duration, or if the fin temperature is greater than the preset defrosting end temperature, it is determined that the spray end condition is met.

[0127] It should be noted that, in the heating operation mode and the cooling operation mode, the preset spraying durations for determining whether to end the spraying may be the same or different.

[0128] In heating mode, when the spraying duration reaches or exceeds the preset spraying duration, it indicates that the spraying process has lasted long enough and the defrosting effect has been achieved. Stopping the spraying can avoid unnecessary energy consumption and waste of water resources.

[0129] The preset defrost end temperature can be set according to the specific situation. When the fin temperature is greater than the preset defrost end temperature, it indicates that the frost on the fin surface has melted or no longer needs to be defrosted. Stopping the spraying at this time can avoid further waste of water resources and ensure the heat exchange efficiency of the fin heat exchanger.

[0130] Furthermore, in order to improve the accuracy of the judgment, it is also possible to determine that the spraying end condition is met when the fin temperature is greater than a preset defrosting end temperature within a preset monitoring time.

[0131] It should be noted that after the spraying end condition is reached and the spraying component is controlled to stop running, the controller will return to execute step 202 to spray in time when spraying is needed to avoid the problem of increased unit energy efficiency caused by changes in the state of the fin heat exchanger.

[0132] In one embodiment, as shown in FIG. 5 , before step 206 , the control method of the air-conditioning unit further includes step 502 ; after step 206 , the control method of the air-conditioning unit further includes step 504 and step 506 .

[0133] Step 502, determining a first energy efficiency parameter of the air conditioning unit before the spraying assembly sprays according to the operating state parameter;

[0134] Step 504, obtaining the operating state parameters of the air conditioning unit, and determining the second energy efficiency parameter of the air conditioning unit after the spraying assembly sprays according to the operating state parameters;

[0135] Step 506: When it is determined that the fin heat exchanger is dirty and blocked according to the first energy efficiency parameter and the second energy efficiency parameter, the spray assembly is controlled to operate in a cleaning mode to spray and clean the fin heat exchanger of the air-conditioning unit.

[0136] The spray intensity when the spray assembly is operated in the cleaning mode is greater than the spray intensity when it is operated in the spray mode. It can be understood that when the spray intensity is greater, the spray head and the spray water pressure are also greater.

[0137] Air-cooled units occupy a large area, and most units are placed outdoors for operation. Because there are many impurities, dust, and small garbage in the environment, they may be adsorbed on the surface of the fins, causing fins to become dirty and blocked, affecting energy efficiency and even directly affecting unit operation.

[0138] In this embodiment, by comparing the energy efficiency changes before and after defrosting, the performance changes of the fin heat exchanger can be evaluated and the dirt and blockage can be discovered in time.

[0139] Under normal circumstances, spraying can improve efficiency, that is, the energy efficiency is increased and the effect is obvious. If the ratio of the first energy efficiency parameter to the second energy efficiency parameter (i.e., the energy efficiency ratio) is less than the preset energy efficiency ratio threshold, it is determined that the energy efficiency improvement effect before and after spraying is not obvious, that is, it is determined that the fins are dirty and blocked. Among them, the preset energy efficiency ratio threshold needs to be determined according to the specific situation.

[0140] Specifically, the first energy efficiency parameter represents the energy efficiency of the fin before defrosting, and the second energy efficiency parameter represents the energy efficiency after defrosting. When the ratio of the first energy efficiency parameter to the second energy efficiency parameter is less than the preset energy efficiency ratio threshold, it is determined that the fin heat exchanger is blocked. This may be because the fin heat exchanger is not effectively cleaned during the defrosting process, or the dirt on its surface has seriously affected the heat exchange efficiency, resulting in no obvious change in energy efficiency before and after defrosting.

[0141] At this time, the spray assembly is controlled to operate in cleaning mode. In cleaning mode, the spray intensity is enhanced, the spray head and water pressure are increased, and the sprayed water flow is more rapid, powerful and impactful, so that the stubborn dirt on the fin surface can be removed more comprehensively and effectively.

[0142] In this embodiment, there is no limitation on the method for determining the first energy efficiency parameter and the second energy efficiency parameter, and those skilled in the art may select appropriate operating state parameters for calculation according to relevant technologies.

[0143] Furthermore, in one embodiment, after step 506, the control method of the air conditioning unit further includes:

[0144] After the spray component is controlled to run in the cleaning mode for a preset cleaning time, the spray component is controlled to stop running.

[0145] Among them, the preset cleaning time can be a default value, or it can be set by professionals or users according to local environmental conditions, or it can be set according to whether the fins are cleaned thoroughly during actual spraying. For example, if it is monitored that the fin cleaning effect is not good, the preset cleaning time can be extended to ensure that the fins are thoroughly cleaned.

[0146] By controlling the spray assembly to run in cleaning mode for a preset cleaning time and then stop running, the control method of the air conditioning unit not only ensures that the dirt on the fin surface is effectively removed, but also avoids unnecessary energy consumption and waste. At the same time, the flexibility of the preset cleaning time also enables the method to better adapt to different environments and needs.

[0147] Furthermore, in one embodiment, the controller determines a first energy efficiency parameter before spraying and a second energy efficiency parameter after spraying before and after each time the spray assembly is controlled to operate in spray mode, and determines an energy efficiency ratio based on the energy efficiencies of the first energy efficiency parameter and the second energy efficiency parameter.

[0148] In this embodiment, when the energy efficiency ratio before and after the first spraying is less than the preset energy efficiency ratio threshold, the controller does not judge whether the current fin heat exchanger is dirty or blocked, but comprehensively judges whether the fin heat exchanger is dirty or blocked based on the energy efficiency ratios before and after multiple spraying.

[0149] It is understandable that in the process of obtaining the state parameters required to determine the energy efficiency parameters, if the detection before and after the spraying is disturbed, the obtained energy efficiency ratio value may be inaccurate. In addition, the energy efficiency ratio value is also affected by environmental factors (such as ambient temperature, humidity, wind speed, etc.) and other operating state changes of the unit (such as compressor performance changes, refrigerant leakage, etc.). If these factors change significantly before and after a spraying, the energy efficiency ratio value before and after the spraying may not accurately reflect the dirty and blocked condition of the fin heat exchanger.

[0150] Therefore, in order to improve the accuracy of dirty and blockage judgment, the energy efficiency ratio before and after multiple spraying can be obtained for judgment.

[0151] Specifically: when the controller controls the spray component to operate in the spray mode for multiple times, the controller determines the first energy efficiency parameter before each spray and the second energy efficiency parameter after the spray, and calculates the energy efficiency ratio before and after each control of the spray component to operate in the spray mode. These energy efficiency ratios are statistically analyzed to observe their changing trends and stability. If multiple energy efficiency ratios are lower than the preset threshold, it can be more certain that the fins are dirty and blocked. For example, when the energy efficiency ratio before and after two consecutive sprays is lower than the preset energy efficiency ratio threshold, it can be determined that the fin heat exchanger is dirty and blocked.

[0152] In this embodiment, by improving the accuracy of judging whether the fins are dirty or blocked, the accuracy of spray control can be improved, and the reliability of the air-conditioning unit can be improved.

[0153] In one embodiment, the control method of the air conditioning unit further includes:

[0154] When it is determined according to the operating status parameters that the spray start condition is met, the water receiving component in the air-conditioning unit is controlled to operate.

[0155] The water receiving assembly is used to receive water generated after the fin heat exchanger is sprayed.

[0156] In actual implementation, the water receiving component can be controlled to operate synchronously with the spray component, or it can be controlled to open in advance of the spray component, or it can be controlled to open a certain time later than the spray component. The specific setting can be based on actual conditions.

[0157] In this embodiment, the water generated by the fin heat exchanger after spraying is collected by the water receiving assembly, so that the water left by the fin defrosting can be prevented from being scattered in the unit, thereby making the inside of the unit clean and tidy and easy to clean. In addition, after the water receiving assembly is turned on, the water received by it flows back to the water tank, so that the water generated by the spraying will not be directly lost, but will be collected and reused, which helps to reduce the waste of water resources.

[0158] In one embodiment, the operating state parameters of the air conditioning unit include: water volume parameters of a water tank in the air conditioning unit; the control method of the air conditioning unit also includes:

[0159] When it is determined that the water tank is short of water according to the water quantity parameter, the water inlet component in the air-conditioning unit is controlled to open to replenish the water tank.

[0160] In actual implementation, a water volume detection component electrically connected to the controller is also provided in the water tank, and the water volume detection component is used to detect the water volume parameter in the water tank and transmit it to the controller. The controller compares the water volume parameter with a preset water volume threshold value, and determines that the water tank is short of water when the water volume parameter is lower than the preset water volume threshold value.

[0161] When the water level in the water tank is insufficient, the water inlet component in the air-conditioning unit is controlled to open to replenish the water tank, which can ensure the spraying effect and ensure the safe operation of the air-conditioning unit, thereby improving the operating reliability of the air-conditioning unit.

[0162] It is understood that during the process of replenishing the water tank, the controller will continue to obtain the water volume parameters in the water tank through the water volume detection component, and when the water volume parameter is greater than the preset full water volume, the water inlet component is controlled to be closed to stop the water inlet. The preset water volume threshold and the preset full water volume can be set in combination with the specific parameters of the water tank.

[0163] The control method of the above air-conditioning unit adds spray control logic, which can improve energy efficiency when the unit is cooling; the conventional four-way valve device is cancelled when the unit is heating, avoiding unit failure caused by four-way valve reversing failure during defrosting; at the same time, spraying is combined with water tank heating, and defrosting does not need to be switched, which can solve the problem of unclean defrosting. Combined with the water receiving component connected to the water tank, it can prevent the water left by fin defrosting from being scattered in the unit, making it clean and tidy and easy to clean. When the fins are detected to be dirty and blocked, the spray head can be increased to increase the spray pressure for high-pressure spraying to enhance the cleaning effect of the fins. In this way, the unit capacity is guaranteed while improving energy efficiency and improving user manpower and material resources.

[0164] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0165] Based on the same inventive concept, the embodiment of the present application also provides a control device for an air-conditioning unit for implementing the control method for the air-conditioning unit involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in the embodiments of the control device for one or more air-conditioning units provided below can refer to the limitations of the control method for the air-conditioning unit above, and will not be repeated here.

[0166] In an exemplary embodiment, as shown in FIG6 , a control device for an air conditioning unit is provided, comprising: an instruction acquisition module 602, a parameter monitoring module 604 and a spray control module 606, wherein:

[0167] The instruction acquisition module 602 is used to receive operation control instructions and control the operation of the air-conditioning unit.

[0168] The parameter monitoring module 604 is used to obtain the operating status parameters of the air-conditioning unit during the operation of the air-conditioning unit.

[0169] The spray control module 606 is used to control the spray component in the air-conditioning unit to operate in a spray mode to spray the fin heat exchanger in the air-conditioning unit when it is determined according to the operating state parameters that the spray start condition is met.

[0170] In one embodiment, the spray control module 606 is also used to determine that the spray start conditions are met if the running time of the air-conditioning unit is greater than the preset start-up running time, the cumulative running time of the compressor is greater than the preset interval time, the fin temperature is less than or equal to the preset defrost temperature and the outlet water temperature is greater than the preset defrost minimum outlet water temperature.

[0171] In one embodiment, the spray control module 606 is also used to control the water storage in the water tank of the heating and air conditioning unit; the water tank is connected to the spray assembly.

[0172] In one embodiment, the spray control module 606 is also used to control the conduction of the hot water inlet branch; the hot water inlet branch connects the water tank and the water outlet of the water side heat exchanger of the air-conditioning unit; when the storage water temperature parameter is greater than the preset heating water outlet temperature, the heating component inside the water tank is controlled to turn on, and the hot water inlet branch is controlled to be disconnected.

[0173] In one embodiment, the spray control module 606 is further configured to determine that the spray start condition is met if the ambient dry-bulb temperature is greater than a first preset temperature threshold and the ambient wet-bulb temperature is lower than a second preset temperature threshold.

[0174] In one embodiment, the spray control module 606 is further configured to determine the spray water volume when the spray assembly operates in the spray mode according to the ambient dry-bulb temperature and the ambient wet-bulb temperature.

[0175] In one embodiment, the spray control module 606 is further used to control the spray component to stop running when it is determined according to the current operating state parameters that the spray end condition is reached.

[0176] In one embodiment, the spray control module 606 is further configured to determine that the spray end condition is met if the spray duration is greater than a preset spray duration, or if the fin temperature is greater than a preset defrost end temperature.

[0177] In one embodiment, when it is determined according to the operating state parameters that the spray start condition is met, the spray component of the air-conditioning unit is controlled to operate to spray the fin heat exchanger of the air-conditioning unit, and the spray control module 606 is further used to determine, according to the operating state parameters, a first energy efficiency parameter of the air-conditioning unit before the spray component sprays;

[0178] When it is determined according to the operating status parameters that the spray start conditions are met, the spray component of the air-conditioning unit is controlled to operate to spray the fin heat exchanger of the air-conditioning unit. The spray control module 606 is also used to obtain the operating status parameters of the air-conditioning unit, and determine the second energy efficiency parameter of the air-conditioning unit after the spray component sprays according to the operating status parameters; when it is determined according to the first energy efficiency parameters and the second energy efficiency parameters that the fin heat exchanger is dirty and blocked, the spray component is controlled to operate in the cleaning mode to spray and clean the fin heat exchanger of the air-conditioning unit; the spray intensity when the spray component operates in the cleaning mode is greater than the spray intensity when it operates in the spray mode.

[0179] In one embodiment, the spray control module 606 is also used to control the operation of a water receiving component in the air-conditioning unit when it is determined according to the operating state parameters that the spray start condition is met. The water receiving component is used to receive water generated after the fin heat exchanger is sprayed.

[0180] In one embodiment, the spray control module 606 is also used to control the water inlet component in the air-conditioning unit to open to replenish the water tank when it is determined that the water tank is short of water according to the water volume parameter; the water inlet component is connected to the water tank.

[0181] Each module in the control device of the air-conditioning unit can be implemented in whole or in part by software, hardware or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to each module.

[0182] In one embodiment, an air conditioning system is provided, comprising: a controller and an air conditioning unit electrically connected to the controller, wherein the controller is used to control the air conditioning unit based on a control method of the air conditioning unit. The control method of the air conditioning unit can refer to the above embodiments and will not be described in detail here.

[0183] In one embodiment, the air conditioning unit is an air-cooled air conditioning unit. Referring again to FIG. 1 , the air conditioning unit includes: a compressor 11, a fin heat exchanger 12, an electronic expansion valve 13, and a water-side heat exchanger 14. The compressor 11, the fin heat exchanger 12, the electronic expansion valve 13, and the spray assembly 15 are all electrically connected to the controller. The passage between the compressor 11, the fin heat exchanger 12, the electronic expansion valve 13, and the water-side heat exchanger 14 forms a heat pump circulation loop for refrigerant circulation.

[0184] The fin heat exchanger 12 is disposed within the spraying range of the spray assembly 15 . When the spray assembly 15 starts to operate, the spray water thereof can spray the fin heat exchanger 12 .

[0185] The air conditioning unit further comprises a water tank 16 for storing water. The spray assembly 15 is in communication with the water tank 16. When the spray assembly 15 is started and operated, water is taken from the water tank 16 for spraying.

[0186] In one embodiment, the air conditioning unit further comprises a water inlet assembly 191 electrically connected to the controller, and the water inlet assembly 191 is in communication with the water tank 16. When the controller controls the water inlet assembly 191 to be turned on, the water inlet assembly 191 can replenish the water tank 16 with water.

[0187] Exemplarily, the water inlet component 191 may be a solenoid valve, which is arranged in a water inlet pipeline, and the water inlet pipeline connects the water inlet end of the water side heat exchanger 14 and the water inlet end of the water tank 16. The solenoid valve for water inlet control is electrically connected to the controller, and under the control of the controller, the water inlet control of the water tank 16 is realized.

[0188] In one embodiment, a water volume detection component electrically connected to the controller is also provided in the water tank 16, and the water volume detection component is used to detect water volume parameters in the water tank 16 and transmit them to the controller.

[0189] When the controller determines that the water tank 16 is short of water according to the water volume parameter, the controller controls the water inlet component 191 in the air-conditioning unit to open so as to replenish the water tank 16 with water.

[0190] Exemplarily, the water level detection component can be a pressure sensor for detecting the pressure at the bottom of the water tank 16. The pressure sensor is electrically connected to the controller. When the controller determines that the water pressure is lower than a certain value based on the pressure parameters transmitted by the pressure sensor, it determines that the water level in the water tank 16 is insufficient.

[0191] In this embodiment, when the water level in the water tank 16 is insufficient, the water inlet assembly 11 in the air-conditioning unit is controlled to open to replenish the water tank 16, which can ensure the spraying effect and ensure the safe operation of the air-conditioning unit, thereby improving the operating reliability of the air-conditioning unit.

[0192] In one embodiment, the air conditioning unit further comprises a water discharge pipeline, which is in communication with the water outlet of the water tank 16. The water discharge pipeline is provided with a water discharge solenoid valve 192 electrically connected to the controller.

[0193] When the water tank 16 needs maintenance or the water quality is dirty, the controller can control the water drain solenoid valve 192 to open so that the water in the water tank 16 can be discharged through the drain pipeline.

[0194] In one embodiment, the air conditioning unit further includes a hot water inlet branch 18, which is connected to the water tank 16 and the water outlet of the water side heat exchanger 14. A heating component 161 and a water temperature detection component electrically connected to the controller are provided in the water tank 16. The water temperature detection component is used to monitor the temperature in the water tank and transmit the water temperature in the water tank to the controller.

[0195] During the heating operation of the air-conditioning component, the controller will control the hot water inlet branch 18 to be turned on; at the same time, it will also obtain the stored water temperature through the water temperature detection component. When the stored water temperature parameter is greater than the preset heating water outlet temperature, the hot water inlet branch will be controlled to be disconnected, and the heating component 161 inside the water tank will be controlled to be turned on.

[0196] Among them, the hot water inlet branch 18 is provided with a hot water inlet solenoid valve 181 electrically connected to the controller. When the hot water inlet solenoid valve 181 is turned on, the hot water inlet branch 18 is connected; when the hot water inlet solenoid valve 181 is turned off, the hot water inlet branch 18 is turned off.

[0197] In this embodiment, by controlling the hot water inlet branch 18 to be turned on and connecting the water tank 16 and the water outlet in series, the temperature of the water in the water tank can be quickly increased. When the water temperature parameter is greater than the preset heating water outlet temperature, it means that the water at the water outlet can no longer further increase the water temperature in the water tank 16. At this time, the heating component 161 inside the water tank 16 is controlled to be turned on, so that the water in the water tank 16 can reach a higher temperature, making the water temperature more conducive to defrosting. Among them, the preset heating water outlet temperature can be the temperature of the water outlet detected by the temperature sensing package set at the water outlet; it can also be a set fixed value. The heating component 161 can use a heating belt.

[0198] In one embodiment, the air conditioning unit further comprises a water receiving assembly 17 electrically connected to the controller. The water receiving assembly 17 is connected to the water tank 16.

[0199] When the controller determines that the spray start condition is met according to the operating status parameters, it will also control the operation of the water receiving component 17, which is used to receive the water generated after the fin heat exchanger is sprayed and return the received water to the water tank 16.

[0200] In this embodiment, the water generated by the fin heat exchanger 12 after being sprayed is collected by the water receiving assembly 17, so that the water left by the fin defrosting can be prevented from being scattered in the unit, thereby making the inside of the unit clean and tidy and easy to clean. In addition, after the water receiving assembly 17 is turned on, the water received by it flows back to the water tank 16, so that the water generated by the spraying will not be directly lost, but will be collected and reused, which helps to reduce the waste of water resources.

[0201] In one embodiment, the spray assembly 15 includes a water pump 153, a spray solenoid valve 152 and a spray structure 151; the water pump 131 and the spray solenoid valve 152 are both electrically connected to the controller; the spray structure 151 is connected to the spray solenoid valve 152, and the spray solenoid valve 152 is also connected to the water tank 16 through the water pump 153.

[0202] The spray structure 151 can be set according to specific circumstances. For example, referring to FIG. 7 , the spray structure 151 includes a plurality of spray heads connected to a spray pipeline. The spray pipeline is a pipeline connecting each spray head with the water tank 16, and the water pump 153 and the spray solenoid valve 152 are sequentially arranged in the spray pipeline.

[0203] When the controller controls the spray assembly 15 to spray, specifically, the controller controls both the water pump 131 and the spray solenoid valve 152 to be opened. Moreover, in the cleaning mode, the water pressure and lift of the water pump 153 are greater than those in the spray mode.

[0204] In one embodiment, the water receiving assembly 17 includes a water receiving structure 171, a stop valve 171, a filter 173 and a water receiving solenoid valve 174; the water receiving structure 171 is connected to the water receiving solenoid valve 174 through the stop valve 171, and the water receiving solenoid valve 174 is also connected to the water tank 16; the water receiving solenoid valve 174 and the stop valve 171 are both electrically connected to the controller.

[0205] The water receiving structure 171 can be configured according to specific circumstances. For example, referring to FIG. 7 , the water receiving structure 171 can include a water receiving tray, through which the water generated by the spraying can be efficiently recovered.

[0206] When the controller controls the water receiving assembly 17 to open, specifically, it controls both the stop valve 171 and the water receiving solenoid valve 174 to open, so that the received water flows back to the water tank 16 .

[0207] In this embodiment, by providing a filter 173, the recovered water can be filtered and then flow back to the water tank 16 to ensure the cleanliness of the water used for spraying.

[0208] In other embodiments, the water receiving component 17 may be provided with a water storage component to store the received water.

[0209] In one embodiment, the number of the stop valves may be multiple. For example, the number of the stop valves 172 may be two, which are respectively arranged on one side of the water inlet end and one side of the water outlet end of the filter 173 to achieve more precise control.

[0210] In order to better understand the above embodiment, a detailed explanation is given below in conjunction with a specific embodiment. In one embodiment, please refer to FIG1. ​​When the controller receives a heating operation instruction and controls the air-conditioning unit to operate in heating mode, as shown in FIG8, the control method of the air-conditioning unit further includes:

[0211] Step 1: The unit is turned on for heating, and the hot water inlet solenoid valve 181 is powered on and opened. It can be understood that after the unit is turned on, except for the electronic expansion valve 13 that participates in the operation of the system, the remaining valves are all in a closed state unless otherwise specified.

[0212] Step 2, detect the water storage temperature T. When the water storage temperature T> the preset heating water outlet temperature Tout-3, close the hot water inlet electromagnetic valve 181 and open the heating belt 161. It can be understood that when the water storage temperature is close to the outlet water temperature or the highest temperature of the water tank is the same as the outlet water temperature, the water storage temperature should be as high as possible for defrosting considerations, so the electromagnetic valve 181 is closed and the heating belt 161 is opened for heating on this basis. The electromagnetic valve 181 is closed because the flowing water temperature cannot be stabilized, that is, the heating effect cannot be achieved by opening the heating belt 161.

[0213] Step 3: Check whether the frost identification and defrost conditions are met. The frost identification and defrost conditions include:

[0214] ① The cumulative running time of the compressor Q> the preset interval time W;

[0215] ②Fin temperature (the defrost temperature detected by the temperature sensor on the fin) E≤preset defrost temperature R;

[0216] ③ The outlet water temperature Y of the air conditioner outlet water pipe is greater than the preset minimum outlet water temperature for defrosting (the minimum tolerable outlet water temperature for defrosting) U;

[0217] ④ The unit’s current running time exceeds the preset startup running time, for example, N minutes.

[0218] If all the above conditions are met, it means that the unit has been frosted. Open the spray solenoid valve 152 and the water pump 153 (that is, open the spray pipeline) to spray and defrost, and then open the water solenoid valve 174 (that is, open the water receiving pan pipeline).

[0219] Note: The spray flow takes high-temperature hot water from the water tank 16 to spray and defrost the frosted top cover parts. The spray water and the water after the frosting is melted are collected by the water receiving pan and returned to the water tank 16 through the water receiving pan pipeline.

[0220] Step 4: When the spray solenoid valve 152 is turned on, the controller will also perform the following tests:

[0221] (1) Spray duration (i.e. defrost time) Th> preset spray duration Tt;

[0222] (2) The fin temperature (defrost temperature) K detected during the preset monitoring time (continuous f seconds) is greater than the preset defrost end temperature L.

[0223] If any of the above points is met, it is confirmed that the spraying end condition is met, and the spraying electromagnetic valve 152 and the water pump 153 can be closed, and the water receiving electromagnetic valve 174 can be closed after a period of time (such as 1 minute).

[0224] Step 5: After closing the spray solenoid valve 152, return to step 1 and open the hot water inlet solenoid valve 181.

[0225] Step 6, record the unit energy efficiency A before opening the spray solenoid valve 152 for defrosting and the energy efficiency B after exiting defrosting. If A / B<X (preset energy efficiency ratio threshold), it can be determined that the energy efficiency before and after defrosting does not change much, and the fins are initially determined to be dirty and blocked; the next time the spray defrosting process is entered, it is determined again. If A / B<X still occurs, it is considered that the fins are dirty and blocked. At this time, the pressure of the water pump 153 is switched to high pressure mode to clean the fins.

[0226] When the fins are cleaned, it is in cleaning mode, the water pump 153, the spray solenoid valve 152 and the water receiving solenoid valve 174 are opened, and the preset cleaning time (such as S time period) is continued. When the fin cleaning is exited, the water pump 153 and the spray solenoid valve 152 can be closed, and the water receiving solenoid valve 174 will be closed 1 minute later.

[0227] It should be noted that the spray defrosting is performed at normal pressure. After entering the fin cleaning mode, the water pump 153 is switched to the maximum lift to increase the water pressure at the nozzle, so that the water is sprayed more quickly, stronger and more impactful for cleaning.

[0228] When the controller receives a cooling operation instruction and controls the air conditioning unit to operate in cooling mode, as shown in FIG9 , the control method of the air conditioning unit includes:

[0229] Step 1, start the unit's refrigeration, detect the ambient dry-bulb temperature T1 and the ambient wet-bulb temperature T2, when the ambient dry-bulb temperature T1 is greater than the first preset temperature threshold z (the z setting value is above 0 degrees), when the ambient wet-bulb temperature T2 is less than the second preset temperature threshold y, start the efficiency-enhancing spray, and turn on the water pump 153, the spray solenoid valve 152 and the water receiving solenoid valve 174.

[0230] After spraying, the condenser surface receives the sprayed water mist, which is tiny water droplets evaporating on the fin surface to take away heat, reduce the condensing temperature and improve the energy efficiency of the unit.

[0231] The optimal spray flow rate of the water pump 153 can be set according to the detection values ​​of the dry-bulb temperature T1 and the ambient wet-bulb temperature T2.

[0232] Step 1: Real-time detection of unit energy efficiency. When the unit energy efficiency a after spraying and the unit energy efficiency b before spraying meet b / a<h (preset energy efficiency ratio threshold, cooling mode and heating mode can take different values), it is preliminarily determined that the fins are dirty and blocked. The next time the spray defrosting process is entered, it is determined again. If the situation of b / a<h still occurs, it is considered that the fins are dirty and blocked. At this time, the pressure of the water pump 153 is switched to the high-pressure mode for fin cleaning. For details, please refer to the heating mode and will not be repeated here.

[0233] The fan control of air-cooled air-conditioning units is mainly based on the changes in high and low pressures, supplemented by the outlet air temperature of a single fan, so that the fan operation is coordinated with the unit operation in real time to achieve the optimal state.

[0234] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0235] In one embodiment, a computer program product is provided, including a computer program, which implements the steps in the above method embodiments when executed by a processor.

[0236] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0237] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0238] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A control method for an air conditioning unit, characterized in that: The method comprises: Receiving operation control instructions to control the operation of the air conditioning unit; During the operation of the air conditioning unit, obtaining the operating status parameters of the air conditioning unit; When it is determined according to the operating state parameters that the spray start condition is met, the spray component in the air-conditioning unit is controlled to operate in a spray mode to spray the fin heat exchanger in the air-conditioning unit.

2. The method according to claim 1, characterized in that The controlling the operation of the air conditioning unit includes: controlling the heating operation of the air conditioning unit; The operating state parameters include: the operating time of the air conditioning unit, the cumulative operating time of the compressor in the air conditioning unit, the fin temperature of the fin heat exchanger, and the outlet water temperature of the outlet water pipeline of the air conditioning unit; The method further comprises: If the running time of the air-conditioning unit is greater than the preset startup running time, the cumulative running time of the compressor is greater than the preset interval time, the fin temperature is less than or equal to the preset defrost temperature and the water outlet temperature is greater than the preset defrost minimum water outlet temperature, it is determined that the spray start condition is met.

3. The method according to claim 2, characterized in that After acquiring the operating state parameters of the air-conditioning unit, before controlling the spray assembly in the air-conditioning unit to operate in a spray mode to spray the fin heat exchanger in the air-conditioning unit when it is determined according to the operating state parameters that the spray start condition is met, the method further includes: Controlling the heating of the water stored in the water tank of the air conditioning unit; the water tank is connected to the spray assembly.

4. The method according to claim 3, characterized in that The operating state parameter of the air conditioning unit includes a water temperature parameter of the water tank; the controlling and heating the water in the water tank of the air conditioning unit includes: Controlling the hot water inlet branch to be conductive; the hot water inlet branch is connected to the water tank and the water outlet of the water side heat exchanger of the air conditioning unit; When the water storage temperature parameter is greater than the preset heating water outlet temperature, the heating component inside the water tank is controlled to be turned on, and the hot water inlet branch is controlled to be disconnected.

5. The method according to claim 1, characterized in that The controlling the operation of the air conditioning unit comprises: controlling the cooling operation of the air conditioning unit; The operating status parameters include: the ambient dry-bulb temperature and the ambient wet-bulb temperature of the environment in which the air-conditioning unit is located; The method further comprises: If the ambient dry-bulb temperature is greater than a first preset temperature threshold and the ambient wet-bulb temperature is lower than a second preset temperature threshold, it is determined that the spray start condition is met.

6. The method according to claim 5, characterized in that The method further comprises: The amount of spray water when the spray assembly operates in the spray mode is determined according to the ambient dry-bulb temperature and the ambient wet-bulb temperature.

7. The method according to claim 1, characterized in that After the spraying component of the air-conditioning unit is controlled to operate to spray the fin heat exchanger of the air-conditioning unit when it is determined according to the operating state parameter that the spraying start condition is met, the method further includes: Obtaining current operating status parameters of the air conditioning unit; When it is determined according to the current operating state parameters that the spraying end condition is reached, the spraying component is controlled to stop operating.

8. The method according to claim 7, characterized in that The operating state parameters include: spray duration and fin temperature of the fin heat exchanger; The method further comprises: If the spraying duration is longer than a preset spraying duration, or if the fin temperature is higher than a preset defrosting end temperature, it is determined that the spraying end condition is met.

9. The method according to claim 1, characterized in that: Before controlling the spray assembly of the air-conditioning unit to operate to spray the fin heat exchanger of the air-conditioning unit when it is determined according to the operating state parameter that the spray start condition is met, the method further includes: Determine, according to the operating status parameter, a first energy efficiency parameter of the air conditioning unit before the spray assembly sprays; After the spraying component of the air-conditioning unit is controlled to operate to spray the fin heat exchanger of the air-conditioning unit when it is determined according to the operating state parameter that the spraying start condition is met, the method further includes: Acquire the operating state parameters of the air-conditioning unit, and determine the second energy efficiency parameter of the air-conditioning unit after the spraying component sprays according to the operating state parameters; When it is determined that the fin heat exchanger is dirty or clogged according to the first energy efficiency parameter and the second energy efficiency parameter, the spray component is controlled to operate in a cleaning mode to spray and clean the fin heat exchanger of the air-conditioning unit; the spray intensity of the spray component when operating in the cleaning mode is greater than the spray intensity when operating in the spray mode.

10. The method according to any one of claims 1 to 9, characterized in that The method further comprises: When it is determined according to the operating state parameters that the spray start condition is met, the water receiving component in the air conditioning unit is controlled to operate, and the water receiving component is used to receive water generated after the fin heat exchanger is sprayed.

11. The method according to claim 10, characterized in that The operating state parameters include: water volume parameters of the water tank in the air conditioning unit; the water tank is connected to the spray component and the water receiving component respectively; The method further comprises: When it is determined that the water tank is short of water according to the water volume parameter, the water inlet component in the air-conditioning unit is controlled to open so as to replenish water in the water tank; the water inlet component is connected to the water tank.

12. A control device for an air conditioning unit, characterized in that: The device comprises: An instruction acquisition module, used for receiving operation control instructions to control the operation of the air conditioning unit; A parameter monitoring module, used for obtaining the operating status parameters of the air-conditioning unit during the operation of the air-conditioning unit; The spray control module is used to control the spray component in the air-conditioning unit to operate in a spray mode to spray the fin heat exchanger in the air-conditioning unit when it is determined according to the operating state parameters that the spray start condition is met.

13. An air conditioning system, characterized in that: include: A controller and an air conditioning unit electrically connected to the controller; wherein the air conditioning unit comprises a water tank, a water-side heat exchanger, a controller, a compressor electrically connected to the controller, a fin heat exchanger, an electronic expansion valve and a spray assembly; the passages among the compressor, the fin heat exchanger, the electronic expansion valve and the water-side heat exchanger form a heat pump circulation loop; the spray assembly is connected to the water tank; The controller is also used to implement the steps of the method according to any one of claims 1 to 11.

14. The air conditioning system according to claim 13, characterized in that: The air conditioning unit further comprises a hot water inlet branch, the hot water inlet branch being connected to the water tank and the water outlet end of the water side heat exchanger; A heating component and a water temperature detection component electrically connected to the controller are arranged in the water tank.

15. The air conditioning system according to claim 13, characterized in that: The spray assembly includes a water pump, a spray solenoid valve and a spray structure; the water pump and the spray solenoid valve are electrically connected to the controller; the spray structure is connected to the spray solenoid valve, and the spray solenoid valve is also connected to the water tank through the water pump.

16. The air conditioning system according to claim 13, characterized in that: The air conditioning unit also includes a water receiving assembly electrically connected to the controller; The controller is also used to control the operation of the water receiving component when it is determined according to the operating state parameters that the spraying start condition is met. The water receiving component is used to receive water generated after the fin heat exchanger is sprayed.

17. The air conditioning system according to claim 16, characterized in that: The water receiving assembly includes a water receiving structure, a stop valve, a filter and a water receiving solenoid valve; the water receiving structure is connected to the water receiving solenoid valve through the stop valve, and the water receiving solenoid valve is also connected to the water tank; the water receiving solenoid valve and the stop valve are both electrically connected to the controller.

18. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 11 are implemented.

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