Control method of air handling device, air handling device, and storage medium

Abstract

The application discloses a kind of air treatment equipment control method, air treatment equipment and storage medium.Therein, air treatment equipment includes the first heat exchanger in first refrigerant circulation system and second heat exchanger, third heat exchanger and fourth heat exchanger in second refrigerant circulation system, first heat exchanger and third heat exchanger are arranged in air supply duct and along the airflow direction in air supply duct, second heat exchanger and fourth heat exchanger are all arranged in the external space of air supply duct, the method comprises: according to the first temperature of second heat exchanger and the second temperature of fourth heat exchanger determines target control parameter;According to target control parameter control first refrigerant circulation system operation and / or control second refrigerant circulation system operation, so that the energy efficiency of air treatment equipment reaches target energy efficiency.The application aims at improving the energy efficiency of air treatment equipment, to improve the air treatment effect of air treatment equipment.

Description

Technical Field

[0001] This invention relates to the field of air treatment technology, and more particularly to a control method for air treatment equipment, an air treatment device, and a storage medium. Background Technology

[0002] With the development of economy and technology and the continuous improvement of people's living standards, the application of air handling equipment is becoming more and more widespread, such as air conditioners or fresh air systems. Among them, some air handling equipment uses a dual system to exchange heat with the air in the duct in order to regulate the temperature and humidity of the air.

[0003] Currently, when air handling equipment uses more than one heat exchange system to regulate air, the operation of each heat exchange system is generally controlled independently. This can easily lead to poor overall energy efficiency of the air handling equipment during operation, failing to achieve the required energy efficiency and affecting the air conditioning effect of the air handling equipment. Summary of the Invention

[0004] The main objective of this invention is to provide a control method for an air handling device, an air handling device, and a storage medium, with the aim of improving the energy efficiency of the air handling device and thus enhancing its air handling effect.

[0005] To achieve the above objectives, the present invention provides a control method for an air handling device. The air handling device includes an air supply duct, a first refrigerant circulation system, and a second refrigerant circulation system. The first refrigerant circulation system includes a first heat exchanger and a second heat exchanger, and the second refrigerant circulation system includes a third heat exchanger and a fourth heat exchanger. The first and third heat exchangers are disposed within the air supply duct and arranged along the airflow direction within the air supply duct. The second and fourth heat exchangers are both disposed in the external space of the air supply duct. The control method for the air handling device includes the following steps:

[0006] Obtain the first temperature of the second heat exchanger and the second temperature of the fourth heat exchanger;

[0007] The target control parameter is determined based on the first temperature and the second temperature. The target control parameter is used to adjust the heat exchange ratio between the second heat exchanger and the fourth heat exchanger.

[0008] The first refrigerant circulation system and / or the second refrigerant circulation system are controlled according to the target control parameters so that the energy efficiency of the air handling equipment reaches the target energy efficiency.

[0009] Optionally, the step of determining the target control parameter based on the first temperature and the second temperature includes:

[0010] Determine the relationship between the first temperature and the second temperature;

[0011] Determine the magnitude relationship between the relationship value and the target numerical range corresponding to the target energy efficiency;

[0012] The target control parameter is determined based on the magnitude relationship.

[0013] Optionally, the first refrigerant circulation system further includes a first compressor, the second refrigerant circulation system further includes a second compressor, the second heat exchanger is correspondingly provided with a third fan, the fourth heat exchanger is correspondingly provided with a fourth fan, the relationship value includes the ratio of the first temperature to the second temperature, and the step of determining the target control parameter based on the magnitude relationship includes:

[0014] When both the second heat exchanger and the fourth heat exchanger are operating as condensers, and when the ratio of the magnitudes is greater than the upper limit of the target value range, the target control parameters are determined to include reducing the operating frequency of the first compressor, increasing the operating frequency of the second compressor, and / or increasing the speed of the third fan.

[0015] When both the second heat exchanger and the fourth heat exchanger function as condensers, and when the ratio of the magnitudes is less than the lower limit of the target value range, the target control parameters are determined to include increasing the operating frequency of the first compressor, decreasing the operating frequency of the second compressor, and / or increasing the speed of the fourth fan.

[0016] Optionally, when the magnitude relationship is such that the ratio is greater than the upper limit of the target value range, determining the target control parameter includes the steps of reducing the operating frequency of the first compressor, increasing the operating frequency of the second compressor, and / or increasing the speed of the third fan.

[0017] When the ratio is greater than the upper limit of the target value range, the current speed of the third fan is obtained; when the current speed is greater than or equal to the preset upper limit of the speed, the target control parameter is determined to include reducing the operating frequency of the first compressor.

[0018] When the current rotational speed is less than the preset upper limit of rotational speed, the target control parameter is determined to include increasing the rotational speed of the third fan.

[0019] Optionally, when the magnitude relationship is such that the ratio is less than the lower limit of the target value range, determining the target control parameter includes the steps of increasing the operating frequency of the first compressor, decreasing the operating frequency of the second compressor, and / or increasing the speed of the fourth fan.

[0020] When the ratio is less than the lower limit of the target value range, if the second temperature is less than or equal to the preset temperature, the target control parameter is determined to be increasing the operating frequency of the first compressor; if the second temperature is greater than the preset temperature, one of increasing the operating frequency of the first compressor, decreasing the operating frequency of the second compressor, and increasing the speed of the fourth fan is determined to be the target control parameter according to the reference parameter.

[0021] The reference parameters include the air outlet parameters of the air supply duct and / or the environmental parameters of the indoor environment.

[0022] Optionally, the air handling equipment further includes an exhaust duct separated from the supply air duct, the fourth heat exchanger and the fourth fan are both located in the exhaust duct, and both the supply air duct and the exhaust air duct are used to connect the indoor environment and the outdoor environment. The step of determining one of the following as the target control parameter—increasing the operating frequency of the first compressor, decreasing the operating frequency of the second compressor, and increasing the speed of the fourth fan—based on reference parameters includes:

[0023] When the reference parameter is greater than the corresponding target parameter value, the target control parameter is determined to be to increase the speed of the fourth fan and / or increase the operating frequency of the first compressor;

[0024] When the reference parameter is less than or equal to the corresponding target parameter value, the target control parameter is determined to be reducing the operating frequency of the second compressor;

[0025] The target parameter value is a pre-set target value that the reference parameter needs to achieve to meet the comfort requirements of the indoor space.

[0026] Optionally, the step of determining the target control parameter as increasing the speed of the fourth fan and / or increasing the operating frequency of the first compressor includes:

[0027] When the operating frequency of the first compressor is greater than or equal to the preset upper limit of frequency, the target control parameter is determined to be to increase the speed of the fourth fan.

[0028] When the operating frequency of the first compressor is less than the preset upper limit value, the target control parameter is determined to be to increase the operating frequency of the first compressor.

[0029] Optionally, the air outlet parameters include air outlet temperature and / or air outlet humidity, and the environmental parameters include at least one of the following: ambient temperature, ambient humidity, and ambient moisture content.

[0030] Furthermore, in order to achieve the above objectives, this application also proposes an air handling device, the air handling device comprising:

[0031] Air supply duct;

[0032] A first refrigerant circulation system, comprising a first heat exchanger and a second heat exchanger, wherein the first heat exchanger is disposed within the air supply duct and the second heat exchanger is disposed in the external space of the air supply duct.

[0033] The second refrigerant circulation system includes a third heat exchanger and a fourth heat exchanger. The third heat exchanger is located inside the air supply duct. The first heat exchanger and the third heat exchanger are arranged along the airflow direction inside the air supply duct. The fourth heat exchanger is located in the external space of the air supply duct.

[0034] A control device is provided, wherein both the first refrigerant circulation system and the second refrigerant circulation system are connected to the control device. The control device includes: a memory, a processor, and a control program for an air handling device stored in the memory and executable on the processor. When the control program for the air handling device is executed by the processor, it implements the steps of the control method for the air handling device as described in any of the preceding claims.

[0035] In addition, to achieve the above objectives, this application also proposes a storage medium storing a control program for an air handling device, which, when executed by a processor, implements the steps of the control method for the air handling device as described in any of the preceding claims.

[0036] This invention proposes a control method for an air handling equipment. Based on an air handling equipment comprising at least a first refrigerant circulation system and a second refrigerant circulation system, a first heat exchanger in the first refrigerant circulation system and a third heat exchanger in the second refrigerant circulation system are arranged sequentially along the airflow direction within the air duct of the air handling equipment. The second heat exchanger in the first refrigerant circulation system and a fourth heat exchanger in the second refrigerant circulation system are both located outside the air supply duct. This method controls the operation of the first and / or second refrigerant circulation systems by combining target control parameters determined by the temperatures of the second and fourth heat exchangers located outside the air supply duct in both the first and second refrigerant circulation systems, thereby achieving control over the air handling equipment. The adjustment of heat exchange between the first and second refrigerant circulation systems outside the air duct is no longer independent. Instead, the two systems are coordinated and adjusted based on the actual output capacity of the two systems under the heat exchange state of the air in the air duct, as reflected by the temperatures of the second and fourth heat exchangers. This ensures that the first and second refrigerant circulation systems can operate in a coordinated manner, achieving the target energy efficiency for the overall air handling equipment. This effectively solves the problem of poor energy efficiency that exists when the first and second refrigerant circulation systems are independently controlled, thereby improving the energy efficiency of the air handling equipment and enhancing its air handling effect. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the system structure of an embodiment of the air handling equipment of the present invention;

[0038] Figure 2 This is a schematic diagram of the hardware structure involved in the operation of an embodiment of the air handling equipment of the present invention;

[0039] Figure 3 This is a flowchart illustrating an embodiment of the control method for the air handling equipment of the present invention;

[0040] Figure 4 This is a schematic flowchart of another embodiment of the control method for the air handling equipment of the present invention;

[0041] Figure 5 for Figure 4 A detailed flowchart of step S23;

[0042] Figure 6 for Figure 5 A detailed flowchart of step S231;

[0043] Figure 7 for Figure 5 A detailed flowchart of step S232.

[0044] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0045] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0046] The main solution of this invention is: a control method based on an air handling device, the air handling device including an air supply duct, a first refrigerant circulation system, and a second refrigerant circulation system. The first refrigerant circulation system includes a first heat exchanger and a second heat exchanger, and the second refrigerant circulation system includes a third heat exchanger and a fourth heat exchanger. The first heat exchanger and the third heat exchanger are disposed within the air supply duct and arranged sequentially along the airflow direction within the air supply duct. The second heat exchanger and the fourth heat exchanger are both disposed in the external space of the air supply duct. The method includes: acquiring a first temperature of the second heat exchanger and a second temperature of the fourth heat exchanger; determining a target control parameter based on the first temperature and the second temperature, the target control parameter being used to adjust the heat exchange ratio between the second heat exchanger and the fourth heat exchanger; and controlling the operation of the first refrigerant circulation system and / or controlling the operation of the second refrigerant circulation system based on the target control parameter, so that the energy efficiency of the air handling device reaches the target energy efficiency.

[0047] In existing technologies, when air handling equipment uses more than one heat exchange system to regulate air, the operation of each heat exchange system is generally controlled independently. This can easily lead to poor overall energy efficiency of the air handling equipment during operation, failing to achieve the required energy efficiency and affecting the air conditioning effect of the air handling equipment.

[0048] The present invention provides the above-mentioned solution, which aims to improve the energy efficiency of air handling equipment, thereby improving the air handling effect of the air handling equipment.

[0049] This invention provides an air handling device. In this embodiment, the air handling device is a fresh air system. In other embodiments, the air handling device may also be a device for internally circulating and regulating indoor air, such as an air conditioner.

[0050] In this embodiment of the invention, reference is made to Figure 1 and Figure 2The air handling unit includes an air supply duct 01, a first refrigerant circulation system 1, a second refrigerant circulation system 2, and a control device 100. The first refrigerant circulation system 1 includes a first heat exchanger 11, and the second refrigerant circulation system 2 includes a third heat exchanger 21. The first heat exchanger 11 and the third heat exchanger 21 are disposed within the air supply duct 01 and arranged sequentially along the airflow direction within the air supply duct 01. Both the first refrigerant circulation system 1 and the second refrigerant circulation system 2 are connected to the control device 100, which can be used to control the operation of the first refrigerant circulation system 1 and the second refrigerant circulation system 2.

[0051] The air supply duct 01 is connected to the air outlet of the indoor environment. In this embodiment, the air supply duct 01 is a fresh air duct connecting the indoor and outdoor environments. Outdoor fresh air can be delivered into the room through the air supply duct 01. The first heat exchanger 11 and the third heat exchanger 21 are arranged sequentially from the fresh air inlet toward the air outlet of the indoor environment. In other embodiments, the air supply duct 01 can also be an internal circulation duct for the indoor environment, with the first heat exchanger 11 and the third heat exchanger 21 arranged sequentially from the return air inlet of the air supply duct 01 toward the air outlet of the indoor environment.

[0052] The first heat exchanger 11 is located upstream of the air supply duct 01, and the third heat exchanger 21 is located downstream of the air supply duct 01. The air entering the air supply duct 01 first flows through the first heat exchanger 11 for heat exchange, and the air after heat exchange through the first heat exchanger 11 flows through the third heat exchanger 21 for heat exchange.

[0053] Specifically, a first fan 31 may be installed in the air supply duct 01. When the first fan 31 is turned on, it can drive air to flow through the air supply duct 01. Specifically, when the first fan 31 is turned on, it can drive outdoor fresh air to enter the air supply duct 01 from the side where the first heat exchanger 11 is located, and send it into the indoor environment from the side where the third heat exchanger 21 is located.

[0054] In this embodiment, refer to Figure 1 The first refrigerant circulation system 1 includes a first refrigerant circulation loop, which includes a first compressor 12, a first heat exchanger 11, a first throttling device 13 and a second heat exchanger 14 connected in series. The second refrigerant circulation loop includes a second compressor 22, a third heat exchanger 21, a second throttling device 23 and a fourth heat exchanger 24 connected in series.

[0055] In this embodiment, the air conditioner also includes an exhaust duct 02 separated from the supply air duct 01. The exhaust duct 02 connects the outdoor environment with the indoor exhaust vent. Indoor air can be discharged to the outside through the exhaust duct 02. An exhaust fan 32 can be installed in the exhaust duct 02. The exhaust fan 32 drives the indoor air to flow through the exhaust duct 02 and be discharged to the outside.

[0056] When the first refrigerant circulation system 1 is in heating mode, the refrigerant flowing out of the first compressor 12 flows sequentially through the first heat exchanger 11, the first throttling device 13 and the second heat exchanger 14 and then flows back to the first compressor 12; when the first refrigerant circulation system 1 is in cooling mode, the refrigerant flowing out of the first compressor 12 flows sequentially through the second heat exchanger 14, the first throttling device 13 and the first heat exchanger 11 and then flows back to the first compressor 12.

[0057] When the second refrigerant circulation system 2 is in heating mode, the refrigerant flowing out of the first compressor 12 flows sequentially through the third heat exchanger 21, the second throttling device 23 and the fourth heat exchanger 24 and then flows back to the second compressor 22. When the second refrigerant circulation system 2 is in cooling mode, the refrigerant flowing out of the second compressor 22 flows sequentially through the fourth heat exchanger 24, the second throttling device 23 and the third heat exchanger 21 and then flows back to the second compressor 22.

[0058] Furthermore, in this embodiment, referring to Figure 1 The second heat exchanger 14 is located outdoors, and the fourth heat exchanger 24 is located inside the exhaust duct 02. In other embodiments, both the second heat exchanger 14 and the fourth heat exchanger 24 may be located outdoors, or both may be located inside the exhaust duct 02. Here, "outdoor" specifically refers to the outside of the indoor environment connected by the supply air duct 01.

[0059] The first refrigerant circulation system 1 also includes a third fan 33 corresponding to the second heat exchanger 14. When the third fan 33 is turned on, it drives the air in the environment where the second heat exchanger 14 is located to exchange heat with the second heat exchanger 14. The second refrigerant circulation system 2 also includes a fourth fan corresponding to the fourth heat exchanger 24. When the fourth fan is turned on, it drives the air in the environment where the fourth heat exchanger 24 is located to exchange heat with the fourth heat exchanger 24. When the fourth heat exchanger 24 is located in the exhaust duct 02, the fourth fan and the exhaust fan 32 can be the same fan.

[0060] In this embodiment of the invention, when the second heat exchanger 14 is running as a condenser, the first refrigerant circulation system 1 is in a refrigeration operation state, and at this time, the first heat exchanger 11 is running as an evaporator; when the fourth heat exchanger 24 is running as a condenser, the second refrigerant circulation system 2 is in a refrigeration operation state; at this time, the third heat exchanger 21 is running as an evaporator.

[0061] In other embodiments, the first refrigerant circulation system 1 may further include a first heat exchange module and a first electronic expansion valve disposed within the first air duct 01. The first heat exchange module, the first electronic expansion valve, and the first heat exchanger 11 are connected in series, with the first heat exchange module located downstream of the third heat exchanger 21. The second refrigerant circulation system 2 may further include a second heat exchange module and a second electronic expansion valve disposed within the first air duct 01. The second heat exchange module, the second electronic expansion valve, and the third heat exchanger 21 are connected in series, with the second heat exchange module located downstream of the third heat exchanger 21. In this embodiment, when the second heat exchanger 14 operates as a condenser, the first refrigerant circulation system 1 can be in a cooling operation state, at which time both the first heat exchanger 11 and the first heat exchange module operate as evaporators; when the second heat exchanger 14 operates as a condenser, the first refrigerant circulation system 1 can also be in a dehumidification and reheat operation state, at which time the first heat exchanger 11 operates as an evaporator, and both the first heat exchange module and the second heat exchanger 14 operate as condensers. When the fourth heat exchanger 24 is operating as a condenser, the second refrigerant circulation system 2 can be in a refrigeration operation state. At this time, the third heat exchanger 21 and the second heat exchange module both operate as evaporators. When the fourth heat exchanger 24 is operating as a condenser, the second refrigerant circulation system 21 can also be in a dehumidification and reheat operation state. At this time, the third heat exchanger 21 operates as an evaporator, and the second heat exchange module and the fourth heat exchanger 24 both operate as condensers.

[0062] Furthermore, in this embodiment, referring to Figure 2 The air handling unit also includes a first air sensor 4 and a second air sensor 5. The first air sensor 4 is located in the indoor space connected by the air supply duct 01, and the second air sensor 5 is located at the air outlet of the air supply duct 01. Both the first air sensor 4 and the second air sensor 5 are connected to the control device 100, which can acquire the data detected by the first air sensor 4 and the second air sensor 5. The first air sensor 4 is used to detect environmental parameters (such as ambient temperature and / or ambient humidity) of the indoor space connected by the air supply duct 01, and the second air sensor 5 is used to detect the air outlet parameters (such as outlet air temperature and / or outlet air humidity) of the air supply duct 01.

[0063] Furthermore, in this embodiment, referring to Figure 2 The air handling equipment also includes a first temperature sensor 6 and a second temperature sensor 7, both of which are connected to the control device 100. The first temperature sensor 6 is located in the second heat exchanger 14 to detect the temperature of the second heat exchanger 14, and the second temperature sensor 7 is located in the fourth heat exchanger 24 to detect the temperature of the fourth heat exchanger 24.

[0064] In this embodiment of the invention, reference is made to Figure 2The control device 100 of the air handling equipment includes a processor 1001 (e.g., CPU), a memory 1002, a timer 1003, etc. The components in the control device 100 are connected via a communication bus. The memory 1002 can be a high-speed RAM or a stable, non-volatile memory, such as a disk drive. Optionally, the memory 1002 can also be a storage device independent of the aforementioned processor 1001.

[0065] Those skilled in the art will understand that Figure 2 The device structure shown does not constitute a limitation on the device and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0066] like Figure 2 As shown, the memory 1002, which serves as a storage medium, may include a control program for an air handling device. Figure 2 In the device shown, the processor 1001 can be used to call the control program of the air handling equipment stored in the memory 1002 and execute the relevant steps of the control method of the air handling equipment in the following embodiments.

[0067] This invention also provides a control method for an air handling device, which is applied to the aforementioned air handling device.

[0068] Reference Figure 3 This application proposes an embodiment of a control method for an air handling device. In this embodiment, the control method for the air handling device includes:

[0069] Step S10: Obtain the first temperature of the second heat exchanger and the second temperature of the fourth heat exchanger;

[0070] The first temperature can be obtained by acquiring data from the first temperature sensor located in the middle of the second heat exchanger. The second temperature can be obtained by acquiring data from the second temperature sensor located in the middle of the fourth heat exchanger.

[0071] Step S20: Determine a target control parameter based on the first temperature and the second temperature. The target control parameter is used to adjust the heat exchange ratio between the second heat exchanger and the fourth heat exchanger.

[0072] Different target control parameters result in different amounts of heat exchange as air flows through the third and fourth heat exchangers. This heat exchange includes both cooling and heating.

[0073] The target control parameters may specifically include at least one control parameter of any type in the first and second refrigerant circulation systems that is related to the setting of the heat exchange capacity of the second and fourth heat exchangers, such as the frequency control parameters of the first and / or second refrigerant circulation systems, the fan control parameters of the first and / or second refrigerant circulation systems, and / or the operation control parameters of the throttling devices in the first and / or second refrigerant circulation systems.

[0074] The target control parameter may include at least one of a first control parameter, a second control parameter, a third control parameter, and a fourth control parameter. The first control parameter includes increasing the heat exchange capacity of the second heat exchanger, the second control parameter includes decreasing the heat exchange capacity of the fourth heat exchanger, the third control parameter includes decreasing the heat exchange capacity of the second heat exchanger, and the fourth control parameter includes increasing the heat exchange capacity of the fourth heat exchanger.

[0075] Different first temperatures and different second temperatures correspond to different target control parameters. The correspondence between the first temperature, the second temperature, and the target control parameters can be preset, and the correspondence can include calculation relationships, mapping relationships, etc. Based on this correspondence, the target control parameters corresponding to the current first temperature and second temperature can be determined.

[0076] Specifically, the output capacity ratio of the first and second refrigerant circulation systems can be calculated by combining the first and second temperatures. Based on the magnitude or quantitative relationship between this ratio and the target ratio corresponding to the target energy efficiency, the target control parameters can be determined. Alternatively, the magnitude or quantitative relationship between the first and second temperatures and their respective target energy efficiency thresholds can be determined separately, and the target control parameters can be determined based on more than one magnitude or quantitative relationship.

[0077] Step S30: Control the operation of the first refrigerant circulation system and / or the operation of the second refrigerant circulation system according to the target control parameters, so that the energy efficiency of the air handling equipment reaches the target energy efficiency.

[0078] The energy efficiency of an air handling unit specifically characterizes its overall heat exchange efficiency for air within the duct. The target energy efficiency is an energy efficiency value greater than a preset value (e.g., 50% of the optimal energy efficiency). In this embodiment, the target energy efficiency is the optimal energy efficiency of the air handling unit. In other embodiments, the target energy efficiency may also be an energy efficiency value other than the optimal energy efficiency, such as 85% or 95% of the optimal energy efficiency.

[0079] When the target control parameters include the control parameters of the first refrigerant circulation system, the first refrigerant circulation system is controlled to operate according to the target control parameters; when the target control parameters include the control parameters of the second refrigerant circulation system, the second refrigerant circulation system is controlled to operate according to the target control parameters; when the target control parameters include the control parameters of the first refrigerant circulation system and the control parameters of the second refrigerant circulation system, the operation of both the first and second refrigerant circulation systems can be controlled according to the target control parameters.

[0080] This invention proposes a control method for an air handling unit, based on an air handling unit comprising at least a first refrigerant circulation system and a second refrigerant circulation system. A first heat exchanger in the first refrigerant circulation system and a third heat exchanger in the second refrigerant circulation system are arranged sequentially along the airflow direction within the air duct of the air handling unit. Both the second heat exchanger in the first refrigerant circulation system and a fourth heat exchanger in the second refrigerant circulation system are located outside the air supply duct. This method controls the operation of the first and / or second refrigerant circulation systems by combining target control parameters determined by the temperatures of the second and fourth heat exchangers located outside the air supply duct in both the first and second refrigerant circulation systems. The adjustment of the heat exchange between the first and second refrigerant circulation systems outside the air duct is no longer independent. Instead, the two systems are coordinated and adjusted based on the actual output capacity of the two systems under the heat exchange state of the air in the air duct, as reflected by the temperatures of the second and fourth heat exchangers. This ensures that the first and second refrigerant circulation systems can operate in a coordinated manner, achieving the target energy efficiency for the overall air handling equipment. This effectively solves the problem of poor energy efficiency caused by independent control of the first and second refrigerant circulation systems, thereby improving the energy efficiency of the air handling equipment and enhancing its air handling effect.

[0081] Furthermore, in this embodiment, the control method of the air handling equipment further includes: controlling both the second and fourth heat exchangers to operate as condensers, and controlling the first and third heat exchangers to operate as evaporators, and executing step S10. In this embodiment, when both the first and second refrigerant circulation systems are operating in cooling or dehumidifying mode, the above three parameters regulate the heat exchange ratio of the first and second refrigerant circulation systems within the air duct, thereby effectively improving the efficiency of the air conditioner during cooling and dehumidifying operation.

[0082] In other embodiments, step S10 may also be performed when both the first heat exchanger and the third heat exchanger are operating as condensers; or when one of the first heat exchanger and the third heat exchanger is operating as an evaporator and the other of the first heat exchanger and the third heat exchanger is operating as a condenser.

[0083] Furthermore, in this embodiment, the air handling equipment also includes an exhaust duct separated from the supply air duct. The fourth heat exchanger is located within the exhaust duct. Both the supply air duct and the exhaust air duct connect the indoor and outdoor environments, and the second heat exchanger is located in the outdoor environment. Based on this, the fourth heat exchanger can recover energy from the exhaust air. The first and second temperatures accurately characterize the overall energy efficiency of the air handling equipment under current operating conditions. The output capacity of the two refrigerant circulation systems can be adjusted based on the first and second temperatures, thereby improving the accuracy of the adjustment and further ensuring that the equipment's energy efficiency reaches the target energy efficiency.

[0084] Furthermore, based on the above embodiments, another embodiment of the control method for the air handling equipment of this application is proposed. In this embodiment, reference is made to... Figure 4 Step S20 includes:

[0085] Step S21: Determine the relationship between the first temperature and the second temperature;

[0086] The relationship value specifically refers to a characteristic value that characterizes the quantitative relationship between a first temperature and a second temperature. In this embodiment, the relationship value includes the ratio of the first temperature to the second temperature. Specifically, the first temperature is defined as T1, and the second temperature as T2, then the ratio = T1 / T2. In other embodiments, the relationship value may also include the difference, sum, or product of the first and second temperatures, etc.

[0087] Step S22: Determine the magnitude relationship between the relationship value and the target numerical range corresponding to the target energy efficiency;

[0088] The target numerical range specifically refers to the range of values ​​that the air handling equipment needs to reach to achieve the target energy efficiency. The target numerical range can be a set of values ​​including a single value, meaning that the upper and lower limits of the target numerical range are the same value. Alternatively, in this embodiment, the target numerical range can be a set of values ​​including more than one value. In this embodiment, the target numerical range is an interval with both an upper and lower limit. In other embodiments, the target numerical range can also be an interval with an upper limit but no lower limit, or an interval with a lower limit but no upper limit.

[0089] The size relationship specifically includes the relationship value being greater than the value within the target value range, the relationship value being less than the value within the target value range, or the relationship value being equal to the value within the target value range.

[0090] Step S23: Determine the target control parameter based on the magnitude relationship.

[0091] Different magnitude relationships correspond to different target control parameters. Based on this magnitude relationship, the target control parameter can be determined from parameters such as increasing the frequency of the first compressor, decreasing the frequency of the first compressor, increasing the frequency of the second compressor, decreasing the frequency of the second compressor, increasing the speed of the third fan, and increasing the speed of the fourth fan.

[0092] In this embodiment, the relationship value can accurately reflect the actual relationship between the heat exchange outside the air duct during the heat exchange process of the second and fourth heat exchangers in the air handling equipment. The magnitude of the relationship value and the target value range can accurately reflect the deviation between the actual heat exchange relationship outside the air duct of the two systems and the heat exchange relationship required for the target energy efficiency. Therefore, determining the target control parameter based on this magnitude relationship is beneficial to ensure that when the operation of the first refrigerant circulation system and / or the second refrigerant circulation system is controlled according to the target control parameter, the energy efficiency of the air handling equipment can quickly and accurately reach the target energy efficiency, thereby effectively improving the energy efficiency of the air handling equipment and improving the air handling effect of the air handling equipment.

[0093] Furthermore, in this embodiment, the relationship value includes the ratio of the first temperature to the second temperature. Based on this, the first refrigerant circulation system further includes a first compressor, the second refrigerant circulation system further includes a second compressor, the second heat exchanger is correspondingly equipped with a third fan, and the fourth heat exchanger is correspondingly equipped with a fourth fan. (Refer to...) Figure 5 Step S23 includes:

[0094] Step S231: When both the second heat exchanger and the fourth heat exchanger are operating as condensers, and when the ratio of the magnitudes is greater than the upper limit of the target value range, the target control parameters are determined to include reducing the operating frequency of the first compressor, increasing the operating frequency of the second compressor, and / or increasing the speed of the third fan.

[0095] Based on this, when the ratio is greater than the upper limit of the target value range, at least one of the following can be determined as the target control parameter: reducing the operating frequency of the first compressor, increasing the operating frequency of the second compressor, and increasing the speed of the third fan, based on the default fixed parameters or the actual operating conditions of the air handling equipment.

[0096] The reduction in the frequency of the first compressor and / or the increase in the frequency of the second compressor can be a preset fixed range, or the frequency adjustment value can be determined based on the first temperature and the second temperature (such as the relationship value mentioned above). The first compressor is controlled to reduce its operating frequency according to the determined frequency adjustment value, and / or the second compressor is controlled to increase its operating frequency according to the determined frequency adjustment value.

[0097] When the second heat exchanger is located outdoors, the third fan here corresponds to the outdoor fan; when the second heat exchanger is located in the exhaust duct, the third fan here corresponds to the exhaust fan; when the second heat exchanger is located indoors, the third fan here corresponds to the indoor fan. The increase in the speed of the third fan can be a preset fixed range, or the speed adjustment value can be determined based on the first temperature and the second temperature (such as the relationship value mentioned above), and the operating speed of the third fan can be increased according to the determined speed adjustment value.

[0098] When the ratio is greater than the upper limit of the target value range, it indicates that the output heat ratio of the first refrigerant circulation system and the second refrigerant circulation system outside the air supply duct is too large, causing the air handling equipment to fail to achieve the target energy efficiency. Reducing the operating frequency of the first compressor or increasing the speed of the third fan can lower the condensing temperature of the second heat exchanger, and increasing the operating frequency of the second compressor can raise the condensing temperature of the fourth heat exchanger, thereby reducing the output heat ratio of the first refrigerant circulation system and the second refrigerant circulation system, which can reduce the ratio to approach the target value range, so that the air handling equipment can achieve the target energy efficiency.

[0099] Step S232: When both the second heat exchanger and the fourth heat exchanger are operating as condensers, and when the ratio of the magnitudes is less than the lower limit of the target value range, the target control parameters are determined to include increasing the operating frequency of the first compressor, decreasing the operating frequency of the second compressor, and / or increasing the speed of the fourth fan.

[0100] In this configuration, when the second heat exchanger operates as a condenser, the first heat exchanger operates as an evaporator, and the first refrigerant circulation system can be in either a refrigeration or dehumidification / reheating state. When all four heat exchangers operate as condensers, the third heat exchanger operates as an evaporator, and the second refrigerant circulation system can be in either a refrigeration or dehumidification / reheating state. This application uses the example of both the first and second refrigerant circulation systems operating in a refrigeration state for illustration.

[0101] When the ratio is less than the lower limit of the target value range, at least one of the following can be determined as the target control parameter: increasing the operating frequency of the first compressor, decreasing the operating frequency of the second compressor, and increasing the speed of the fourth fan, based on the default fixed parameters or the actual operating conditions of the air handling equipment.

[0102] The increase in the frequency of the first compressor and / or the decrease in the frequency of the second compressor can be a preset fixed range, or the frequency adjustment value can be determined based on the first temperature and the second temperature (such as the relationship value mentioned above). The first compressor is controlled to increase its operating frequency according to the determined frequency adjustment value, and / or the second compressor is controlled to decrease its operating frequency according to the determined frequency adjustment value.

[0103] When the fourth heat exchanger is located outdoors, the fourth fan here corresponds to the outdoor fan; when the fourth heat exchanger is located in the exhaust duct, the fourth fan here corresponds to the exhaust fan; when the fourth heat exchanger is located indoors, the fourth fan here corresponds to the indoor fan. The increase in the speed of the fourth fan can be a preset fixed range, or the speed adjustment value can be determined based on the first temperature and the second temperature (such as the relationship value mentioned above), and the fourth fan can be controlled to increase its operating speed according to the determined speed adjustment value.

[0104] When the ratio is less than the lower limit of the target value range, it indicates that the heat output ratio of the first refrigerant circulation system and the second refrigerant circulation system in the air duct is too small, causing the air handling equipment to fail to achieve the target energy efficiency. Increasing the operating frequency of the first compressor can increase the condensing temperature of the second heat exchanger, while decreasing the operating frequency of the second compressor can decrease the condensing temperature of the second heat exchanger. This can increase the heat output ratio of the first and second refrigerant circulation systems outside the air duct, thereby increasing the ratio of the first temperature to the second temperature to approach the target value range and enabling the air handling equipment to achieve the target energy efficiency.

[0105] In this embodiment, when the relationship value is the ratio between the first temperature and the second temperature, it can more accurately reflect the output capacity ratio of the two-stage system outside the air supply duct. When the air handling equipment is in cooling operation, the heat output of the second heat exchanger and / or the heat output of the fourth heat exchanger is adjusted by comparing the ratio with the upper and lower limits of the target value range. This ensures that the heat exchange ratio between the second and fourth heat exchangers is neither too large nor too small when the air handling equipment is in cooling operation, effectively improving the energy efficiency of the air handling equipment in cooling and / or dehumidification operation, thereby improving the cooling and dehumidification effect of the air handling equipment on the air entering the air supply duct.

[0106] Specifically, when the target control parameters include reducing the operating frequency of the first compressor and increasing the operating frequency of the second compressor, step S30 may include controlling the first compressor to reduce its operating frequency, and after a first preset time interval, controlling the second compressor to increase its operating frequency. Since the air in the air duct sequentially passes through the heat exchangers in the first and second refrigerant circulation systems, the operation adjustment of the first refrigerant circulation system affects the heat exchange efficiency of the second refrigerant circulation system. Therefore, adjusting the output capacity of the first refrigerant circulation system first and then adjusting the output capacity of the second refrigerant circulation system helps the air handling equipment quickly reach the target energy efficiency.

[0107] Specifically, when the target control parameters include increasing the operating frequency of the first compressor and decreasing the operating frequency of the second compressor, step S30 may include increasing the operating frequency of the first compressor, decreasing the operating frequency of the second compressor after a second preset time interval. Since the air in the air duct sequentially passes through the heat exchangers in the first and second refrigerant circulation systems, the operation adjustment of the first refrigerant circulation system affects the heat exchange efficiency of the second refrigerant circulation system. Therefore, adjusting the output capacity of the first refrigerant circulation system first and then the output capacity of the second refrigerant circulation system helps the air handling equipment quickly reach the target energy efficiency.

[0108] In other embodiments, the relationship value also includes the difference between the first temperature and the second temperature. When the difference is greater than the upper limit of the preset difference range, the target control parameter is determined to include reducing the operating frequency of the first compressor, increasing the operating frequency of the second compressor, and / or increasing the speed of the third fan. When the difference is less than the lower limit of the preset difference range, the target control parameter is determined to include increasing the operating frequency of the first compressor, reducing the operating frequency of the second compressor, and / or increasing the speed of the fourth fan.

[0109] Furthermore, in this embodiment, referring to Figure 6 Step S231 includes:

[0110] Step S2311: When the size relationship is such that the ratio is greater than the upper limit of the target value range, obtain the current rotational speed of the third fan;

[0111] Step S2312: When the current speed is greater than or equal to the preset speed limit value, the target control parameter is determined to include reducing the operating frequency of the first compressor;

[0112] The preset upper limit of the rotational speed is the maximum rotational speed that the third fan can reach in advance.

[0113] When the current speed is greater than or equal to the preset upper limit of speed, the target control parameters may include increasing the operating frequency of the second compressor in addition to reducing the operating frequency of the first compressor.

[0114] Step S2313: When the current rotational speed is less than the preset upper limit of rotational speed, the target control parameter is determined to include increasing the rotational speed of the third fan.

[0115] When the current speed is less than the preset upper limit of speed, the target control parameters may include increasing the operating frequency of the second compressor in addition to increasing the speed of the third fan.

[0116] Based on this, when the third fan is allowed to increase its speed, the air handling equipment's energy efficiency can be achieved by prioritizing the increase of the third fan's speed. This avoids a significant reduction in the air handling equipment's efficiency in regulating the temperature and humidity of the supplied air caused by the decrease in the frequency of the first compressor, thus ensuring that the air handling equipment achieves the target energy efficiency while maintaining its efficiency in regulating the temperature and humidity of the supplied air.

[0117] Furthermore, in this embodiment, the air handling equipment also includes an exhaust duct separated from the supply air duct. The fourth heat exchanger and the fourth fan are both located within the exhaust duct. Both the supply air duct and the exhaust duct are used to connect the indoor environment and the outdoor environment. Based on this, referring to... Figure 7 Step S232 includes:

[0118] Step S2321: When the size relationship is such that the ratio is less than the lower limit of the target value range, if the second temperature is less than or equal to the preset temperature, then the target control parameter is determined to be increasing the operating frequency of the first compressor.

[0119] Step S2322: If the second temperature is greater than the preset temperature, then one of the following is determined as the target control parameter based on the reference parameters: increasing the operating frequency of the first compressor, decreasing the operating frequency of the second compressor, and increasing the speed of the fourth fan.

[0120] The reference parameters include the air outlet parameters of the air supply duct and / or the environmental parameters of the indoor environment.

[0121] Specifically, the air outlet parameters include air outlet temperature and / or air outlet humidity, and the environmental parameters include at least one of the following: ambient temperature, ambient humidity, and ambient moisture content. The air outlet parameters are specifically detected by the first air sensor described above. The ambient temperature and / or ambient humidity can be detected by the second air sensor described above. The ambient moisture content can be calculated from the ambient temperature and ambient humidity.

[0122] When the second temperature is greater than the preset temperature, different reference parameters correspond to different target control parameters.

[0123] In this embodiment, the fourth heat exchanger is located within the exhaust duct. The second temperature accurately reflects the ambient temperature and humidity of the indoor space during the cooling and / or dehumidification operation of the air handling equipment. A lower second temperature indicates lower indoor temperature and humidity. In this case, the operating frequency of the first compressor is prioritized to achieve the target energy efficiency, avoiding a decrease in the energy recovery efficiency of the fourth heat exchanger due to an increase in the speed of the fourth fan or a decrease in the frequency of the second compressor, thus ensuring energy recovery efficiency and further improving the energy efficiency of the equipment. A higher second temperature indicates higher indoor temperature and humidity. In this case, the target control parameters are selected based on reference parameters to ensure that the equipment achieves the target energy efficiency while meeting the comfort requirements of indoor temperature and / or humidity.

[0124] Furthermore, in this embodiment, the step of determining one of the following as the target control parameter—increasing the operating frequency of the first compressor, decreasing the operating frequency of the second compressor, and increasing the speed of the fourth fan—based on reference parameters includes:

[0125] When the reference parameter is greater than the corresponding target parameter value, the target control parameter is determined to be to increase the speed of the fourth fan and / or increase the operating frequency of the first compressor;

[0126] When the reference parameter is less than or equal to the corresponding target parameter value, the target control parameter is determined to be reducing the operating frequency of the second compressor;

[0127] The target parameter value is a pre-set target value that the reference parameter needs to achieve to meet the comfort requirements of the indoor space.

[0128] Different types of reference parameters correspond to different target parameter values. When the reference parameter includes the outlet air parameter, if the outlet air parameter includes the outlet air temperature, the corresponding target parameter value includes a preset outlet air temperature threshold; similarly, if the outlet air parameter includes the outlet air humidity, the corresponding target parameter value includes a preset outlet air humidity threshold. When the reference parameter includes the ambient temperature, the corresponding target parameter value includes a preset ambient temperature; when the reference parameter includes the ambient humidity, the corresponding target parameter value includes a preset ambient humidity; and when the reference parameter includes the ambient moisture content, the corresponding target parameter value includes a preset moisture content. The reference parameters can correspond to different target parameter values ​​when the air handling unit is in cooling or dehumidification operation (the first and third heat exchangers operate as evaporators, and the second and fourth heat exchangers operate as condensers) and heating operation (the first and third heat exchangers operate as condensers, and the second and fourth heat exchangers operate as evaporators).

[0129] For example, in this embodiment, when the outlet air temperature is less than or equal to a preset outlet air temperature threshold, the target control parameter is determined to be to reduce the operating frequency of the second compressor; when the outlet air temperature is greater than the preset outlet air temperature threshold, the target control parameter is determined to be to increase the operating frequency of the first compressor and / or increase the speed of the fourth fan.

[0130] In this embodiment, when the reference parameter is greater than the corresponding target parameter value, it indicates a greater demand for temperature and / or humidity regulation in the air supply duct. In this case, increasing the speed of the fourth fan and / or increasing the operating frequency of the first compressor is preferred to achieve the target energy efficiency of the air handling equipment. This improves the efficiency of the air handling equipment in regulating the temperature and / or humidity of the supplied air, ensuring the air supply's effect on regulating the indoor temperature and / or humidity. When the reference parameter is less than or equal to the corresponding target parameter value, it indicates a relatively smaller demand for temperature and humidity regulation in the air supply duct. In this case, reducing the frequency of the second compressor is preferred to achieve the target energy efficiency of the air handling equipment. This avoids the increase in the speed of the fourth fan causing negative pressure in the indoor environment, which would allow untreated outdoor air to enter the room. It also avoids the increase in the frequency of the first compressor causing excessively low outlet air temperature and humidity, affecting indoor comfort. This ensures both indoor temperature and / or humidity comfort while achieving the target energy efficiency of the air handling equipment.

[0131] In other embodiments, the target control parameter may be set by default to one of reducing the operating frequency of the second compressor, increasing the operating frequency of the first compressor, and increasing the operating speed of the fourth fan, or simultaneously reducing the operating frequency of the second compressor, increasing the operating frequency of the first compressor, and increasing the operating speed of the fourth fan.

[0132] Furthermore, in this embodiment, the step of determining the target control parameter as increasing the speed of the fourth fan and / or increasing the operating frequency of the first compressor includes:

[0133] When the operating frequency of the first compressor is greater than or equal to the preset upper limit of frequency, the target control parameter is determined to be to increase the speed of the fourth fan.

[0134] When the operating frequency of the first compressor is less than the preset upper frequency limit, the target control parameter is determined to be increasing the operating frequency of the first compressor. The preset upper frequency limit is the maximum frequency that the first compressor's operating frequency is allowed to reach, as preset.

[0135] In this embodiment, when the compressor frequency of the first refrigerant circulation system can be further increased, the output capacity of the air handling equipment is adjusted by increasing the operating frequency of the first compressor. When the compressor frequency of the first refrigerant circulation system cannot be further increased, the output capacity of the air handling equipment is adjusted by increasing the speed of the fourth fan. This is beneficial to improve the overall cooling and / or dehumidification capacity of the air handling equipment while achieving the target energy efficiency, thereby further improving the cooling and / or dehumidification efficiency of the air handling equipment.

[0136] Furthermore, embodiments of the present invention also propose a storage medium storing a control program for an air handling device. When the control program for the air handling device is executed by a processor, it implements the relevant steps of any embodiment of the control method for the air handling device described above.

[0137] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0138] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0139] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, air handling equipment, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0140] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A control method for an air handling equipment, characterized in that, The air handling equipment includes an air supply duct, a first refrigerant circulation system, and a second refrigerant circulation system. The first refrigerant circulation system includes a first heat exchanger and a second heat exchanger, and the second refrigerant circulation system includes a third heat exchanger and a fourth heat exchanger. The first heat exchanger and the third heat exchanger are located within the air supply duct and arranged along the airflow direction within the air supply duct. The second heat exchanger and the fourth heat exchanger are both located in the external space of the air supply duct. The first refrigerant circulation system also includes a first compressor, and the second refrigerant circulation system also includes a second compressor. A third fan is correspondingly installed for the second heat exchanger, and a fourth fan is correspondingly installed for the fourth heat exchanger. The control method of the air handling equipment includes the following steps: Obtain the first temperature of the second heat exchanger and the second temperature of the fourth heat exchanger; The target control parameters are determined based on the first temperature and the second temperature; The first refrigerant circulation system and / or the second refrigerant circulation system are controlled according to the target control parameters so that the energy efficiency of the air handling equipment reaches the target energy efficiency. The step of determining the target control parameter based on the first temperature and the second temperature includes: Determine the ratio between the first temperature and the second temperature; When both the second heat exchanger and the fourth heat exchanger are operating as condensers, and when the ratio is greater than the upper limit of the target value range corresponding to the target energy efficiency, the current speed of the third fan is obtained. When the current speed is greater than or equal to the preset upper limit of speed, the target control parameter is determined to include reducing the operating frequency of the first compressor; When the current rotational speed is less than the preset upper limit of rotational speed, the target control parameter is determined to include increasing the rotational speed of the third fan.

2. The control method for the air handling equipment as described in claim 1, characterized in that, After determining the ratio between the first temperature and the second temperature, the method further includes: When both the second heat exchanger and the fourth heat exchanger are operating as condensers, and when the ratio is less than the lower limit of the target value range corresponding to the target energy efficiency, the target control parameters are determined to include increasing the operating frequency of the first compressor, decreasing the operating frequency of the second compressor, and / or increasing the speed of the fourth fan.

3. The control method for the air handling equipment as described in claim 2, characterized in that, The air handling equipment further includes an exhaust duct separated from the supply air duct. The fourth heat exchanger and the fourth fan are both located within the exhaust duct. Both the supply air duct and the exhaust air duct are used to connect the indoor environment and the outdoor environment. When the ratio is less than the lower limit of the target value range corresponding to the target energy efficiency, the steps of determining the target control parameters, including increasing the operating frequency of the first compressor, decreasing the operating frequency of the second compressor, and / or increasing the speed of the fourth fan, include: When the ratio is less than the lower limit of the target value range, if the second temperature is less than or equal to the preset temperature, the target control parameter is determined to be increasing the operating frequency of the first compressor; if the second temperature is greater than the preset temperature, one of increasing the operating frequency of the first compressor, decreasing the operating frequency of the second compressor, and increasing the speed of the fourth fan is determined to be the target control parameter according to the reference parameter. The reference parameters include the air outlet parameters of the air supply duct and / or the environmental parameters of the indoor environment.

4. The control method for the air handling equipment as described in claim 3, characterized in that, The step of determining, based on reference parameters, one of increasing the operating frequency of the first compressor, decreasing the operating frequency of the second compressor, and increasing the speed of the fourth fan as the target control parameter includes: When the reference parameter is greater than the corresponding target parameter value, the target control parameter is determined to be to increase the speed of the fourth fan and / or increase the operating frequency of the first compressor; When the reference parameter is less than or equal to the corresponding target parameter value, the target control parameter is determined to be reducing the operating frequency of the second compressor; The target parameter value is a pre-set target value that the reference parameter needs to achieve to meet the comfort requirements of the indoor space.

5. The control method for the air handling equipment as described in claim 4, characterized in that, The step of determining the target control parameter as increasing the speed of the fourth fan and / or increasing the operating frequency of the first compressor includes: When the operating frequency of the first compressor is greater than or equal to the preset upper limit of frequency, the target control parameter is determined to be to increase the speed of the fourth fan. When the operating frequency of the first compressor is less than the preset upper limit value, the target control parameter is determined to be to increase the operating frequency of the first compressor.

6. The control method for the air handling equipment as described in claim 3, characterized in that, The air outlet parameters include air outlet temperature and / or air outlet humidity, and the environmental parameters include at least one of the following: ambient temperature, ambient humidity, and ambient moisture content.

7. An air handling device, characterized in that, The air handling equipment includes: Air supply duct; The first refrigerant circulation system includes a first heat exchanger and a second heat exchanger. The first heat exchanger is located inside the air supply duct, and the second heat exchanger is located in the external space of the air supply duct. The first refrigerant circulation system also includes a first compressor, and a third fan is correspondingly provided on the second heat exchanger. The second refrigerant circulation system includes a third heat exchanger and a fourth heat exchanger. The third heat exchanger is located inside the air supply duct. The first heat exchanger and the third heat exchanger are arranged along the airflow direction inside the air supply duct. The fourth heat exchanger is located in the external space of the air supply duct. The second refrigerant circulation system also includes a second compressor. The fourth heat exchanger is correspondingly provided with a fourth fan. A control device is provided, wherein both the first refrigerant circulation system and the second refrigerant circulation system are connected to the control device. The control device includes: a memory, a processor, and a control program for an air handling device stored in the memory and executable on the processor. When the control program for the air handling device is executed by the processor, it implements the steps of the control method for the air handling device as described in any one of claims 1 to 6.

8. A storage medium, characterized in that, The storage medium stores a control program for an air handling device, which, when executed by a processor, implements the steps of the control method for the air handling device as described in any one of claims 1 to 6.

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