Method for controlling fresh air equipment, fresh air equipment and storage medium

Abstract

The application discloses a control method of a fresh air equipment, the fresh air equipment and a storage medium, and relates to the field of fresh air equipment control methods.The method comprises the following steps: acquiring an energy consumption parameter corresponding to a current time; when the energy consumption parameter is greater than a preset threshold, determining an air quality parameter corresponding to the fresh air equipment; determining an operation parameter of a fresh air proportion adjustment component according to the air quality parameter, and controlling the fresh air proportion adjustment component to operate according to the operation parameter.The application saves the energy consumption of the fresh air equipment.

Description

Technical Field

[0001] This invention relates to the field of electrical control technology, and in particular to a control method for a fresh air system, the fresh air system itself, and a storage medium. Background Technology

[0002] As people's living standards improve, the requirements for indoor thermal environments are no longer limited to just heating and cooling; emphasis is now placed on five-dimensional regulation of temperature, humidity, airflow, cleanliness, and freshness. The use of fresh air systems has risen to a level driven by health needs, placing higher demands on freshness and cleanliness. Fresh air systems are increasingly being applied as an effective and important solution. However, as devices that handle heat and humidity loads, the greater the demand for fresh air, the higher the energy consumption for fresh air processing will be. Summary of the Invention

[0003] The main objective of this invention is to provide a control method for a fresh air device, a fresh air device, and a storage medium, aiming to solve the problem of how to reduce the energy consumption of fresh air treatment.

[0004] To achieve the above objectives, the present invention provides a control method for a fresh air device, applied to a fresh air device, the fresh air device including a fresh air ratio adjustment component, the fresh air ratio adjustment component being used to adjust the proportion of fresh air in the return air, and the control method for the fresh air device including the following steps:

[0005] Obtain the energy consumption parameters corresponding to the current moment;

[0006] When the energy consumption parameter is greater than a preset threshold, the air quality parameter corresponding to the fresh air device is determined;

[0007] The operating parameters of the fresh air ratio adjustment component are determined based on the air quality parameters, and the fresh air ratio adjustment component is controlled to operate according to the operating parameters.

[0008] In one embodiment, after the step of obtaining the energy consumption parameter corresponding to the current moment, the method further includes:

[0009] When the energy consumption parameter is less than a preset threshold, the fresh air ratio adjustment component is controlled to operate in 100% fresh air mode.

[0010] In one embodiment, the step of obtaining the energy consumption parameter corresponding to the current moment includes:

[0011] Determine the outdoor and indoor enthalpy values ​​corresponding to the fresh air equipment;

[0012] The energy consumption parameter is determined based on the difference between the outdoor enthalpy and the indoor enthalpy.

[0013] In one embodiment, the step of determining the operating parameters of the fresh air ratio adjustment component based on the air quality parameters includes:

[0014] When the air quality parameter is greater than a preset first threshold, the operating parameters of the fresh air ratio adjustment component are determined to be the operating parameters of the fresh air mode.

[0015] When the air quality parameter is less than the preset second threshold, the operating parameters of the fresh air ratio adjustment component are determined to be the operating parameters of the full return air mode;

[0016] When the air quality parameter is greater than or equal to a preset second threshold and less than or equal to a preset first threshold, the operating parameters of the fresh air ratio adjustment component are determined to be the operating parameters of the mixed air mode, wherein the preset first threshold is greater than the preset second threshold.

[0017] In one embodiment, the fresh air ratio adjustment component includes a fresh air valve, an exhaust air valve, and a bypass ventilation valve. The fresh air valve is disposed in the fresh air duct of the fresh air equipment, the exhaust air valve is disposed in the exhaust air duct of the fresh air equipment, and the bypass ventilation valve is disposed between the fresh air duct and the exhaust air duct. The step of controlling the fresh air ratio adjustment component to operate according to the operating parameters includes:

[0018] The fresh air ratio adjustment component is controlled to operate according to the operating parameters to realize the fresh air equipment in 100% fresh air mode, 100% return air mode, or mixed air mode.

[0019] In the 100% fresh air mode, the fresh air valve and the exhaust air valve are controlled to open to their maximum opening, and the bypass ventilation valve is controlled to be fully closed; in the full return air mode, the fresh air valve and the exhaust air valve are controlled to be fully closed, and the bypass ventilation valve is controlled to open to its maximum opening; in the mixed air mode, the fresh air valve, the exhaust air valve and the bypass ventilation valve are all controlled to open to a preset opening.

[0020] In one embodiment, the fresh air equipment further includes a compressor, an electronic expansion valve, a fresh air heat exchanger, a fresh air fan, and an exhaust fan. The fresh air heat exchanger is disposed within the fresh air duct and connected to the compressor. The fresh air fan is disposed within the fresh air duct. After the step of controlling the fresh air proportional adjustment component to operate according to the operating parameters, the system further includes:

[0021] Obtain the set threshold range associated with the current operating condition of the fresh air device;

[0022] Obtain real-time ambient temperature and / or real-time ambient humidity;

[0023] Based on the set threshold range, the real-time ambient temperature and / or the real-time ambient humidity, control at least one of the following: the operating frequency of the compressor, the opening degree of the electronic expansion valve, the speed of the fresh air fan, and the speed of the exhaust fan.

[0024] In one embodiment, the set threshold range includes a first set range and a second set range. The step of controlling at least one of the following based on the set threshold range, the real-time ambient temperature and / or the real-time ambient humidity: the operating frequency of the compressor, the opening degree of the electronic expansion valve, the speed of the fresh air fan, and the speed of the exhaust fan.

[0025] When the real-time ambient temperature and / or the real-time ambient temperature is within a first set range, control the fresh air equipment to increase the operating frequency of the compressor, decrease the opening of the electronic expansion valve, increase the speed of the fresh air fan, and increase the speed of the exhaust fan, at least one of these actions.

[0026] When the real-time ambient temperature and / or the real-time ambient temperature is within a second set range, the fresh air equipment is controlled to reduce at least one of the following: reduce the operating frequency of the compressor, increase the opening of the electronic expansion valve, reduce the speed of the fresh air fan, and reduce the speed of the exhaust fan.

[0027] In one embodiment, the fresh air device includes a first heat exchange system and a second heat exchange system. The step of controlling at least one of the following according to the set threshold range, the real-time ambient temperature and / or the real-time ambient humidity: the operating frequency of the compressor, the opening degree of the electronic expansion valve, the rotational speed of the fresh air fan, and the rotational speed of the exhaust fan:

[0028] Determine the real-time ambient temperature and the real-time ambient humidity, and the third temperature and third humidity corresponding to the set threshold range, respectively;

[0029] Determine the temperature difference between the real-time ambient temperature and the third temperature, and / or determine the humidity difference between the real-time ambient humidity and the third humidity;

[0030] The target control parameters are determined based on the temperature difference and / or the humidity difference, and the target control parameters include at least one of the following: the operating frequency of the compressor, the opening degree of the electronic expansion valve, the speed of the fresh air fan, and the speed of the exhaust fan.

[0031] The operation of the first heat exchange system and / or the operation of the second heat exchange system are controlled according to the target control parameters.

[0032] In one embodiment, the first heat exchange system includes a first fresh air heat exchanger, and the second heat exchange system includes a second fresh air heat exchanger. The first and second fresh air heat exchangers are disposed within the fresh air duct and arranged sequentially along the airflow direction within the fresh air duct. The step of determining the target control parameter based on the temperature difference and / or the humidity difference includes:

[0033] Obtain the temperature of the first heat exchanger of the first fresh air heat exchanger and the temperature of the second heat exchanger of the second fresh air heat exchanger;

[0034] Determine the ratio between the temperatures of the first heat exchanger and the second heat exchanger;

[0035] When both the first fresh air heat exchanger and the second fresh air heat exchanger act as evaporators, and the ratio is greater than a preset ratio, and the temperature difference or the humidity difference is greater than the upper limit of the target value range, the target control parameters are determined to include controlling the first heat exchange system to increase the operating frequency of the compressor and decrease the opening of the electronic expansion valve, and controlling the fresh air equipment to increase the speed of the fresh air fan and the speed of the exhaust fan.

[0036] When both the first fresh air heat exchanger and the second fresh air heat exchanger act as evaporators, and the ratio is less than a preset ratio, and the temperature difference or the humidity difference is greater than the upper limit of the target value range, the target control parameters are determined to include controlling the second heat exchange system to increase the operating frequency of the compressor, decrease the opening of the electronic expansion valve, and controlling the fresh air equipment to increase the speed of the fresh air fan and the speed of the exhaust fan.

[0037] When both the first fresh air heat exchanger and the second fresh air heat exchanger act as evaporators, and the ratio is greater than a preset ratio, and the temperature difference or the humidity difference is less than the upper limit of the target value range, the target control parameters are determined to include controlling the first heat exchange system to reduce the operating frequency of the compressor and increase the opening of the electronic expansion valve, and controlling the fresh air equipment to reduce the speed of the fresh air fan and the speed of the exhaust fan.

[0038] When both the first and second fresh air heat exchangers act as evaporators, and the ratio is less than a preset ratio, and the temperature difference or humidity difference is less than the upper limit of the target value range, the target control parameters are determined to include controlling the second heat exchange system to reduce the operating frequency of the compressor, increasing the opening of the electronic expansion valve, and controlling the fresh air equipment to reduce the speed of the fresh air fan and the speed of the exhaust fan.

[0039] To achieve the above objectives, the present invention also provides a fresh air device, the fresh air device including a memory, a processor, and a control program of the fresh air device stored in the memory and executable on the processor, wherein when the control program of the fresh air device is executed by the processor, it implements the various steps of the control method of the fresh air device as described above.

[0040] To achieve the above objectives, the present invention also provides a computer-readable storage medium storing a control program for a fresh air device, wherein the control program for the fresh air device, when executed by a processor, implements the various steps of the control method for the fresh air device as described above.

[0041] This invention provides a control method for a fresh air system, the fresh air system itself, and a storage medium. The method involves acquiring energy consumption parameters at the current moment; determining the air quality parameters corresponding to the fresh air system when the energy consumption parameters exceed a preset threshold; determining the operating parameters of a fresh air proportional control component based on the air quality parameters; and controlling the fresh air proportional control component to operate according to these parameters. By determining the operating parameters of the fresh air proportional control component based on both energy consumption and air quality parameters, accurate adjustment of the fresh air supply is achieved. This ensures air quality while preventing the fresh air system from continuously operating at high power consumption, thus saving energy. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the structure of the fresh air equipment according to an embodiment of the present invention;

[0043] Figure 2 This is a schematic diagram of the structure of the fresh air equipment according to an embodiment of the present invention;

[0044] Figure 3 This is a schematic diagram of the structure of the fresh air equipment according to an embodiment of the present invention;

[0045] Figure 4 This is a schematic diagram of the hardware structure of the fresh air equipment involved in an embodiment of the present invention;

[0046] Figure 5 This is a flowchart illustrating the first embodiment of the control method for the fresh air device of the present invention;

[0047] Figure 6 This is a detailed flowchart of step S30 of the second embodiment of the control method for the fresh air device of the present invention;

[0048] Figure 7 This is a flowchart illustrating a third embodiment of the control method for the fresh air device of the present invention;

[0049] Figure 8 This is a detailed flowchart of step S60 of the fourth embodiment of the control method for the fresh air device of the present invention.

[0050]

[0051]

[0052] 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

[0053] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0054] The main solution of this invention is: to obtain the energy consumption parameters corresponding to the current moment; when the energy consumption parameters are greater than a preset threshold, to determine the air quality parameters corresponding to the fresh air equipment; to determine the operating parameters of the fresh air ratio adjustment component based on the air quality parameters, and to control the fresh air ratio adjustment component to operate according to the operating parameters.

[0055] The operating parameters of the fresh air ratio adjustment component of the fresh air equipment are determined based on energy consumption parameters and air quality parameters to achieve accurate adjustment of fresh air. While ensuring air quality, this avoids the fresh air equipment from operating at high power consumption continuously, thus saving energy consumption.

[0056] Reference Figure 1 , Figure 1 The fresh air device of the present invention includes: an exhaust duct 10; a fresh air duct 20; and at least one first heat exchange system, the first heat exchange system including a first heat exchanger 31 and a second heat exchanger 32, wherein the first heat exchanger 31 is located in the exhaust duct 10, and the second heat exchanger 32 is located in the fresh air duct 20. The number of second heat exchangers 32 can be two, and both second heat exchangers 32 are fresh air heat exchangers.

[0057] During the operation of the fresh air unit, in cooling mode, the refrigerant circulation path of the first heat exchange system is as follows: compressor 35, four-way valve 34, first heat exchanger 31, electronic expansion valve 33, second heat exchanger 32, electronic expansion valve 33, second heat exchanger 32, four-way valve 34, and finally back to compressor 35. In heating mode, the refrigerant circulation path of the first heat exchange system is as follows: compressor 35, four-way valve 34, second heat exchanger 32, electronic expansion valve 33, second heat exchanger 32, electronic expansion valve 33, first heat exchanger 31, four-way valve 34, and finally back to compressor 35.

[0058] Optionally, the area of ​​the fourth heat exchanger is less than or equal to 50% of the area of ​​the third heat exchanger; and the area of ​​the second heat exchanger is less than or equal to 150% of the area of ​​the first heat exchanger.

[0059] Optionally, refer to Figure 2 The fresh air equipment includes at least one second heat exchange system, the second heat exchange system including a third heat exchanger 41 and a fourth heat exchanger 42, the third heat exchanger 41 being located in the fresh air duct 10, and the fourth heat exchanger 42 being located outdoors. Figure 2In this embodiment, there is one second heat exchanger 32 and one third heat exchanger 41. Both the second heat exchanger 32 and the third heat exchanger 41 are fresh air heat exchangers, wherein the third heat exchanger 41 is the first fresh air heat exchanger and the second heat exchanger 32 is the second fresh air heat exchanger. In cooling mode, the refrigerant circulation of the second heat exchange system is through the compressor 45, the four-way valve 44, the fourth heat exchanger 42, the electronic expansion valve 43, the third heat exchanger 41, the four-way valve 44, and finally back to the compressor 45. In heating mode, the refrigerant circulation of the second heat exchange system is through the compressor 45, the four-way valve 44, the third heat exchanger 41, the electronic expansion valve 43, the fourth heat exchanger 42, the four-way valve 44, and finally back to the compressor 45.

[0060] exist Figure 3 In this embodiment, there are two second heat exchangers 32 and two third heat exchangers 41. Both the two second heat exchangers 32 and the two third heat exchangers 41 are fresh air heat exchangers. One of the two second heat exchangers 32 located upstream of the fresh air duct is the second fresh air heat exchanger. One of the two third heat exchangers 41 located upstream of the fresh air duct is the first fresh air heat exchanger. The first fresh air heat exchanger is located upstream of the second fresh air heat exchanger. There are also two electronic expansion valves 33 and two electronic expansion valves 43.

[0061] Optionally, the exhaust duct 10 is provided with an exhaust fan 11 at its first end and an exhaust valve 12 at its second end; the fresh air duct 20 is provided with a fresh air fan 21 at its first end and a fresh air valve 22 at its second end; a bypass valve 23 is provided between the exhaust duct 10 and the fresh air duct 20. The fresh air proportioning adjustment component includes the exhaust valve 12, the fresh air valve 22, and the bypass valve 23.

[0062] Optionally, refer to Figure 2 The fresh air duct 20 of the fresh air equipment is equipped with a humidification device 50.

[0063] As one solution, fresh air systems can be like... Figure 4 As shown.

[0064] The embodiments of this invention relate to a fresh air system, which includes: a processor 101, such as a CPU, a memory 102, and a communication bus 103. The communication bus 103 is used to enable communication between these components.

[0065] Memory 102 can be high-speed RAM or stable memory (non-volatile memory), such as disk storage. Figure 4As shown, the memory 102, which is a computer-readable storage medium, may include a control program for a fresh air system; and the processor 101 may be used to call the control program for the fresh air system stored in the memory 102 and perform the following operations:

[0066] Obtain the energy consumption parameters corresponding to the current moment;

[0067] When the energy consumption parameter is greater than a preset threshold, the air quality parameter corresponding to the fresh air device is determined;

[0068] The operating parameters of the fresh air ratio adjustment component are determined based on the air quality parameters, and the fresh air ratio adjustment component is controlled to operate according to the operating parameters.

[0069] In one embodiment, the processor 101 can be used to call the control program of the fresh air device stored in the memory 102 and perform the following operations:

[0070] When the energy consumption parameter is less than a preset threshold, the fresh air ratio adjustment component is controlled to operate in 100% fresh air mode.

[0071] In one embodiment, the processor 101 can be used to call the control program of the fresh air device stored in the memory 102 and perform the following operations:

[0072] Determine the outdoor and indoor enthalpy values ​​corresponding to the fresh air equipment;

[0073] The energy consumption parameter is determined based on the difference between the outdoor enthalpy and the indoor enthalpy.

[0074] In one embodiment, the processor 101 can be used to call the control program of the fresh air device stored in the memory 102 and perform the following operations:

[0075] When the air quality parameter is greater than a preset first threshold, the operating parameters of the fresh air ratio adjustment component are determined to be the operating parameters of the fresh air mode.

[0076] When the air quality parameter is less than the preset second threshold, the operating parameters of the fresh air ratio adjustment component are determined to be the operating parameters of the full return air mode;

[0077] When the air quality parameter is greater than or equal to a preset second threshold and less than or equal to a preset first threshold, the operating parameters of the fresh air ratio adjustment component are determined to be the operating parameters of the mixed air mode, wherein the preset first threshold is greater than the preset second threshold.

[0078] In one embodiment, the processor 101 can be used to call the control program of the fresh air device stored in the memory 102 and perform the following operations:

[0079] The fresh air ratio adjustment component is controlled to operate according to the operating parameters to realize the fresh air equipment in 100% fresh air mode, 100% return air mode, or mixed air mode.

[0080] In the 100% fresh air mode, the fresh air valve and the exhaust air valve are controlled to open to their maximum opening, and the bypass ventilation valve is controlled to be fully closed; in the full return air mode, the fresh air valve and the exhaust air valve are controlled to be fully closed, and the bypass ventilation valve is controlled to open to its maximum opening; in the mixed air mode, the fresh air valve, the exhaust air valve and the bypass ventilation valve are all controlled to open to a preset opening.

[0081] In one embodiment, the processor 101 can be used to call the control program of the fresh air device stored in the memory 102 and perform the following operations:

[0082] Obtain the set threshold range associated with the current operating condition of the fresh air device;

[0083] Obtain real-time ambient temperature and / or real-time ambient humidity;

[0084] Based on the set threshold range, the real-time ambient temperature and / or the real-time ambient humidity, control at least one of the following: the operating frequency of the compressor, the opening degree of the electronic expansion valve, the speed of the fresh air fan, and the speed of the exhaust fan.

[0085] In one embodiment, the processor 101 can be used to call the control program of the fresh air device stored in the memory 102 and perform the following operations:

[0086] When the real-time ambient temperature and / or the real-time ambient temperature is within a first set range, control the fresh air equipment to increase the operating frequency of the compressor, decrease the opening of the electronic expansion valve, increase the speed of the fresh air fan, and increase the speed of the exhaust fan, at least one of these actions.

[0087] When the real-time ambient temperature and / or the real-time ambient temperature is within a second set range, the fresh air equipment is controlled to reduce at least one of the following: reduce the operating frequency of the compressor, increase the opening of the electronic expansion valve, reduce the speed of the fresh air fan, and reduce the speed of the exhaust fan.

[0088] In one embodiment, the processor 101 can be used to call the control program of the fresh air device stored in the memory 102 and perform the following operations:

[0089] Determine the real-time ambient temperature and the real-time ambient humidity, and the third temperature and third humidity corresponding to the set threshold range, respectively;

[0090] Determine the temperature difference between the real-time ambient temperature and the third temperature, and / or determine the humidity difference between the real-time ambient humidity and the third humidity;

[0091] The target control parameters are determined based on the temperature difference and / or the humidity difference, and the target control parameters include at least one of the following: the operating frequency of the compressor, the opening degree of the electronic expansion valve, the speed of the fresh air fan, and the speed of the exhaust fan.

[0092] The operation of the first heat exchange system and / or the operation of the second heat exchange system are controlled according to the target control parameters.

[0093] In one embodiment, the processor 101 can be used to call the control program of the fresh air device stored in the memory 102 and perform the following operations:

[0094] Obtain the temperature of the first heat exchanger of the first fresh air heat exchanger and the temperature of the second heat exchanger of the second fresh air heat exchanger;

[0095] Determine the ratio between the temperatures of the first heat exchanger and the second heat exchanger;

[0096] When both the first fresh air heat exchanger and the second fresh air heat exchanger act as evaporators, and the ratio is greater than a preset ratio, and the temperature difference or the humidity difference is greater than the upper limit of the target value range, the target control parameters are determined to include controlling the first heat exchange system to increase the operating frequency of the compressor and decrease the opening of the electronic expansion valve, and controlling the fresh air equipment to increase the speed of the fresh air fan and the speed of the exhaust fan.

[0097] When both the first fresh air heat exchanger and the second fresh air heat exchanger act as evaporators, and the ratio is less than a preset ratio, and the temperature difference or the humidity difference is greater than the upper limit of the target value range, the target control parameters are determined to include controlling the second heat exchange system to increase the operating frequency of the compressor, decrease the opening of the electronic expansion valve, and controlling the fresh air equipment to increase the speed of the fresh air fan and the speed of the exhaust fan.

[0098] When both the first fresh air heat exchanger and the second fresh air heat exchanger act as evaporators, and the ratio is greater than a preset ratio, and the temperature difference or the humidity difference is less than the upper limit of the target value range, the target control parameters are determined to include controlling the first heat exchange system to reduce the operating frequency of the compressor and increase the opening of the electronic expansion valve, and controlling the fresh air equipment to reduce the speed of the fresh air fan and the speed of the exhaust fan.

[0099] When both the first and second fresh air heat exchangers act as evaporators, and the ratio is less than a preset ratio, and the temperature difference or humidity difference is less than the upper limit of the target value range, the target control parameters are determined to include controlling the second heat exchange system to reduce the operating frequency of the compressor, increasing the opening of the electronic expansion valve, and controlling the fresh air equipment to reduce the speed of the fresh air fan and the speed of the exhaust fan.

[0100] Based on the hardware architecture of the above-mentioned fresh air equipment, an embodiment of the control method of the fresh air equipment of the present invention is proposed.

[0101] Reference Figure 5 , Figure 5 This is a first embodiment of the control method for a fresh air device of the present invention, the control method for the fresh air device includes the following steps:

[0102] Step S10: Obtain the energy consumption parameters corresponding to the current moment;

[0103] Specifically, in either the cooling or heating mode of a fresh air system, the energy consumption parameter indicates the amount of energy required by the system. Optionally, the fresh air system can be an air conditioner or an air handling unit such as an air sterilizer.

[0104] Optionally, when the energy consumption parameters include outdoor temperature and indoor temperature, the energy consumption parameter is larger when the difference between the outdoor and indoor temperatures is large, and smaller when the difference is small. Alternatively, when the energy consumption parameters include outdoor enthalpy and indoor enthalpy, the energy consumption parameter is larger when the difference between the outdoor and indoor enthalpy is large, and smaller when the difference is small.

[0105] Optionally, when the energy consumption parameters are outdoor enthalpy and indoor enthalpy, determine the corresponding outdoor enthalpy h1 and indoor enthalpy h2 for the fresh air equipment, and determine the energy consumption parameter H based on the difference between outdoor enthalpy h1 and indoor enthalpy h2, i.e., H = h1 - h2. Here, the enthalpy in the air represents the total heat contained in the air, and the enthalpy i is calculated using the following formula:

[0106] i = 1.01t + (2490 + 1.84t)d;

[0107] Or i = (1.01 + 1.84d)t + 2490d (kJ / kg dry air);

[0108] Where t represents the air temperature in °C; d represents the air humidity; 1.01 represents the average isobaric specific heat of dry air in kJ / (kg·K); 1.84 represents the average isobaric specific heat of water vapor in kJ / (kg·K); and 2490 represents the latent heat of vaporization of water at 0 °C in kJ / kg.

[0109] Step S20: When the energy consumption parameter is greater than a preset threshold, determine the air quality parameter corresponding to the fresh air device;

[0110] Specifically, when the energy consumption parameter exceeds the preset threshold, it indicates that the higher the proportion of fresh air in the current environment, the greater the energy demand; that is, a larger energy consumption is required when operating in 100% fresh air mode. At this point, it is necessary to determine whether the air quality parameters meet the user's needs. The air quality parameters corresponding to the fresh air system can be the air quality parameters within the room. Therefore, it is necessary to determine the air quality parameters of the fresh air system. Optionally, the air quality parameters include at least one of the following: carbon dioxide (CO2) concentration, PM2.5 concentration, TVOC (Total Volatile Organic Compounds) concentration, and alcohol (CHO) concentration.

[0111] Optionally, when the energy consumption parameter is less than the preset threshold, it indicates that the proportion of fresh air is high in the current environment, but the energy consumption requirement is low. That is, when the fresh air mode is activated, the required energy consumption is low. Therefore, the fresh air proportion adjustment component is controlled to operate in the fresh air mode.

[0112] Step S30: Determine the operating parameters of the fresh air ratio adjustment component based on the air quality parameters, and control the fresh air ratio adjustment component to operate according to the operating parameters.

[0113] Specifically, the fresh air ratio adjustment component is used to adjust the ratio of return air to fresh air in the air supplied to the room by the fresh air equipment. Optionally, the fresh air ratio adjustment component includes a fresh air valve, an exhaust air valve, and a bypass ventilation valve. The fresh air valve is located in the fresh air duct and is used to adjust the fresh air volume; the exhaust air valve is located in the exhaust air duct and is used to adjust the exhaust air volume; and the bypass ventilation valve is located between the fresh air duct and the exhaust air duct and is used to adjust the return air volume entering the fresh air duct from the exhaust air duct.

[0114] The operating parameters of the fresh air ratio adjustment component are determined based on air quality parameters. Optionally, when the air quality is determined to be good based on air quality parameters, the fresh air ratio is reduced, and when the air quality is determined to be poor based on air quality parameters, the current fresh air ratio is maintained or the fresh air ratio is increased. The operating parameters include the fresh air ratio.

[0115] In the technical solution of this embodiment, the operating parameters of the fresh air ratio adjustment component of the fresh air equipment are determined according to the energy consumption parameters and air quality parameters, so as to achieve accurate adjustment of the fresh air. While ensuring air quality, the fresh air equipment is prevented from continuously operating at a large power consumption, thus saving the energy consumption of the fresh air equipment.

[0116] Reference Figure 6 , Figure 6This is a second embodiment of the control method for the fresh air device of the present invention. Based on the first embodiment, step S30 includes:

[0117] Step S31: When the air quality parameter is greater than the preset first threshold, determine the operating parameters of the fresh air ratio adjustment component as the operating parameters of the fresh air mode;

[0118] Step S32: When the air quality parameter is less than the preset second threshold, determine the operating parameters of the fresh air ratio adjustment component as the operating parameters of the full return air mode;

[0119] Step S33: When the air quality parameter is greater than or equal to a preset second threshold and less than or equal to a preset first threshold, the operating parameters of the fresh air ratio adjustment component are determined to be the operating parameters of the mixed air mode, wherein the preset first threshold is greater than the preset second threshold.

[0120] Specifically, when the air quality parameter is greater than the preset first threshold, it indicates that the current indoor air quality is poor. However, even under conditions of high energy consumption, it is still necessary to maintain indoor air quality. Therefore, the operating parameters of the fresh air ratio adjustment component are determined to be the operating parameters of the fresh air mode, and the fresh air ratio adjustment component is controlled to operate according to the operating parameters of the fresh air mode.

[0121] When the air quality parameter is less than the preset second threshold, it indicates that the current indoor air quality is good. Therefore, the operating parameters of the fresh air ratio adjustment component are determined to be the operating parameters of the full return air mode, and the fresh air ratio adjustment component is controlled to operate according to the operating parameters of the full return air mode. Among them, the preset first threshold is greater than the preset second threshold. Optionally, when the air quality parameter is carbon dioxide concentration, 200ppm≤first threshold≤second threshold≤3000ppm.

[0122] When the air quality parameter is greater than or equal to the preset second threshold and less than or equal to the preset first threshold, it indicates that the current indoor air quality is average. The operating parameters of the fresh air ratio adjustment component are then determined to be the operating parameters of the mixed air mode, and the fresh air ratio adjustment component is controlled to operate according to the operating parameters of the mixed air mode.

[0123] The difference between the fresh air mode, the full return air mode, and the mixed air mode lies in the proportion of fresh air. Optionally, the proportion of fresh air in the fresh air mode is 100%, the proportion of fresh air in the full return air mode is 0%, and the proportion of fresh air in the mixed air mode can be between 0% and 100%. The specific proportion value can be determined by the air quality parameters.

[0124] The fresh air ratio control component includes a fresh air valve, an exhaust air valve, and a bypass ventilation valve. Optionally, in 100% fresh air mode, the fresh air valve and exhaust air valve are controlled to open to their maximum opening degree, and the bypass ventilation valve is controlled to be fully closed. The operating parameters for 100% fresh air mode include the opening degree of each valve. In full return air mode, the fresh air valve and exhaust air valve are controlled to be fully closed, and the bypass ventilation valve is controlled to open to its maximum opening degree. The operating parameters for full return air mode include the opening degree of each valve. In mixed air mode, the fresh air valve, exhaust air valve, and bypass ventilation valve are all controlled to open to preset opening degrees. The operating parameters for mixed air mode include the opening degree of each valve.

[0125] In the technical solution of this embodiment, the operating parameters of the fresh air ratio adjustment component of the fresh air equipment are determined according to the energy consumption parameters and air quality parameters, so as to achieve accurate adjustment of the fresh air. While ensuring air quality, the fresh air equipment is prevented from continuously operating at a large power consumption, thus saving the energy consumption of the fresh air equipment.

[0126] Reference Figure 7 , Figure 7 This is a third embodiment of the control method for the fresh air device of the present invention, based on the first or second embodiment, wherein after step S30, it further includes:

[0127] Step S40: Obtain the set threshold range associated with the current operating condition of the fresh air device, wherein the set threshold range includes a first set range and a second set range;

[0128] Step S50: Obtain the real-time ambient temperature and / or real-time ambient humidity;

[0129] Step S60: Based on the set threshold range, the real-time ambient temperature and / or the real-time ambient humidity, control at least one of the following: the operating frequency of the compressor, the opening degree of the electronic expansion valve, the speed of the fresh air fan, and the speed of the exhaust fan.

[0130] Specifically, the real-time ambient temperature refers to the ambient temperature detected at the current moment, which may include one of the following: the return air temperature of the fresh air unit, the fresh air temperature, the supply air temperature, or the room temperature. The real-time ambient humidity refers to the ambient humidity detected at the current moment. Optionally, the real-time ambient humidity may include one of the following: the return air humidity, the fresh air humidity, the supply air humidity, or the room humidity.

[0131] The current operating conditions of the fresh air system are associated with a set threshold range. Optionally, the set threshold range includes a first set range and a second set range.

[0132] Optionally, the real-time ambient temperature is acquired. If the real-time ambient temperature reaches a set target temperature threshold, the real-time ambient temperature is determined to be within a first set range. Optionally, if the real-time ambient temperature does not reach the set target temperature threshold, the real-time ambient temperature is determined to be within a second set range.

[0133] Optionally, the real-time ambient humidity is acquired. Optionally, when the real-time ambient humidity reaches a set target humidity threshold, the real-time ambient humidity is determined to be within a first set range. Optionally, when the real-time ambient humidity does not reach the set target humidity threshold of the fresh air device, the real-time ambient humidity is determined to be within a second set range.

[0134] Optionally, the real-time ambient temperature and humidity are acquired. Optionally, when the real-time ambient temperature reaches a set target temperature threshold and the real-time ambient humidity reaches a set target humidity threshold, the real-time ambient temperature and humidity are determined to be within a first set range. Optionally, when the real-time ambient temperature does not reach the set target temperature threshold and / or the real-time ambient humidity does not reach the set target humidity threshold of the fresh air device, the real-time ambient temperature and humidity are determined to be within a second set range.

[0135] Based on the set threshold range, real-time ambient temperature and / or real-time ambient humidity, control at least one of the following: compressor operating frequency, electronic expansion valve opening, fresh air fan speed, and exhaust fan speed. When adjusting the real-time ambient temperature and / or real-time ambient humidity, the proportion of fresh air should remain constant; otherwise, indoor air quality will decrease, resulting in a failure to achieve the required temperature, humidity, and air quality. Therefore, both the fresh air fan and exhaust fan need to be adjusted simultaneously to ensure that the proportion of fresh air remains unchanged.

[0136] Optionally, when the real-time ambient temperature and / or the real-time ambient temperature is within a first set range, the fresh air equipment is controlled to increase at least one of the following: increase the operating frequency of the compressor, decrease the opening of the electronic expansion valve, increase the speed of the fresh air fan, and increase the speed of the exhaust fan.

[0137] Optionally, when the real-time ambient temperature and / or the real-time ambient temperature is within a second set range, the fresh air equipment is controlled to reduce at least one of the following: reduce the operating frequency of the compressor, increase the opening of the electronic expansion valve, reduce the speed of the fresh air fan, and reduce the speed of the exhaust fan.

[0138] In the technical solution of this embodiment, the target control parameters of the fresh air equipment are determined by the ambient temperature and / or ambient humidity, so that the fresh air equipment can quickly reach the set threshold range associated with the operating conditions, thus ensuring control accuracy.

[0139] Reference Figure 8 , Figure 8 In the fourth embodiment of the dehumidifier control method of the present invention, based on any one of the first to third embodiments, step S60 includes:

[0140] Step S61: Determine the real-time ambient temperature and the real-time ambient humidity, and the third temperature and third humidity corresponding to the set threshold range, respectively;

[0141] Step S62: Determine the temperature difference between the real-time ambient temperature and the third temperature, and / or determine the humidity difference between the real-time ambient humidity and the third humidity;

[0142] Step S63: Determine target control parameters based on the temperature difference and / or the humidity difference. The target control parameters include at least one of the following: the operating frequency of the compressor, the opening degree of the electronic expansion valve, the speed of the fresh air fan, and the speed of the exhaust fan.

[0143] Step S64: Control the operation of the first heat exchange system and / or control the operation of the second heat exchange system according to the target control parameters.

[0144] Specifically, the fresh air equipment includes a first heat exchange system and a second heat exchange system. The first heat exchange system includes a first fresh air heat exchanger, and the second heat exchange system includes a second fresh air heat exchanger. The first and second fresh air heat exchangers are located in the fresh air duct and are arranged sequentially along the airflow direction in the fresh air duct.

[0145] Optionally, the third temperature corresponding to the real-time ambient temperature and the set threshold range is the set target temperature threshold; optionally, the third humidity corresponding to the real-time ambient humidity and the set threshold range is the set target humidity threshold.

[0146] Optionally, the third temperature T3 and the third humidity d3 are target temperature thresholds and target humidity thresholds input by the user via a remote control or smart device. Optionally, the third temperature T3 and the third humidity d3 can be the target temperature and target humidity associated with the user-selected operating mode. For example, in the strong cooling mode, the third temperature T3 is 16 degrees and the third humidity d3 is 40%.

[0147] Optionally, the third temperature may include one of the following: return air temperature threshold, fresh air temperature threshold, supply air temperature threshold, and room temperature threshold. For example, in cooling mode, the return air temperature threshold T1c ∈ [15,32]℃, and in heating mode, the return air temperature threshold T1h ∈ [12,32]℃. In cooling mode, the fresh air temperature threshold Twc ∈ [10,50]℃, and in heating mode, the fresh air temperature threshold Twh ∈ [-30,25]℃. In cooling mode, the supply air temperature threshold Toc ∈ [5,32]℃, and in heating mode, the supply air temperature threshold Toh ∈ [15,60]℃. In cooling mode, the room temperature threshold T1c ∈ [15,32]℃, and in heating mode, the room temperature threshold T1h ∈ [12,32]℃.

[0148] Optionally, the third humidity includes one of the return air humidity threshold, the fresh air humidity threshold, the supply air humidity threshold, and the room humidity threshold. For example, the return air humidity threshold is [5,14] g / kg, the fresh air humidity threshold is [5,18] g / kg, the supply air humidity threshold is [5,16] g / kg, and the room humidity threshold is [5,14] g / kg.

[0149] The temperature difference between the real-time ambient temperature and the third temperature is determined, and / or the temperature difference between the real-time ambient humidity and the third humidity is determined. Optionally, a ratio, difference, product, or sum can also be determined. Optionally, a first ratio between the real-time ambient temperature T1 and the third temperature T3 is determined, for example, the first ratio is T1 / T3. Optionally, a second ratio between the real-time ambient humidity d1 and the third humidity d3 is determined, for example, the second ratio is d1 / d3.

[0150] Optionally, the temperatures of the first and second heat exchangers of the first and second fresh air heat exchangers are obtained; the ratio between the first and second heat exchanger temperatures is determined. Optionally, when both the first and second fresh air heat exchangers act as evaporators, and the ratio is greater than a preset ratio, and the temperature difference or humidity difference is greater than the upper limit of the target value range, the target control parameters are determined, including controlling the first heat exchange system to increase the compressor's operating frequency and decrease the opening of the electronic expansion valve, and controlling the fresh air equipment to increase the speed of the fresh air fan and the exhaust fan. Priority is given to controlling the first heat exchange system to improve the energy efficiency of the fresh air equipment.

[0151] Optionally, when both the first and second fresh air heat exchangers function as evaporators, and their ratio is less than a preset ratio, and the temperature difference or humidity difference exceeds the upper limit of the target value range, the target control parameters include controlling the second heat exchange system to increase the compressor's operating frequency and decrease the opening of the electronic expansion valve, and controlling the fresh air equipment to increase the speed of the fresh air fan and the exhaust fan. Priority is given to controlling the second heat exchange system to improve the energy efficiency of the fresh air equipment.

[0152] Optionally, when both the first and second fresh air heat exchangers function as evaporators, and their ratio is greater than a preset ratio, and the temperature difference or humidity difference is less than the upper limit of the target value range, the target control parameters include controlling the first heat exchange system to reduce the compressor's operating frequency and increase the opening of the electronic expansion valve, and controlling the fresh air equipment to reduce the speed of the fresh air fan and the exhaust fan. Priority is given to controlling the first heat exchange system to improve the energy efficiency of the fresh air equipment.

[0153] Optionally, when both the first and second fresh air heat exchangers function as evaporators, and their ratio is less than a preset ratio, and the temperature difference or humidity difference is less than the upper limit of the target value range, the target control parameters include controlling the second heat exchange system to reduce the compressor's operating frequency and increase the opening of the electronic expansion valve, and controlling the fresh air equipment to reduce the speed of the fresh air fan and the exhaust fan. Priority is given to controlling the second heat exchange system to improve the energy efficiency of the fresh air equipment.

[0154] The target numerical range specifically refers to the target range that the air handling equipment's operating ratio needs to reach. 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.

[0155] Optionally, the difference between the real-time ambient temperature and the third temperature, and / or the difference between the real-time ambient humidity and the third humidity, are used to determine the compressor's operating frequency, the bypass valve opening, and / or the fresh air fan's speed. For example, when the temperature detected by the fresh air equipment is 15 degrees Celsius and the third temperature is 26 degrees Celsius, the larger the difference, the greater the increase in the compressor's operating frequency, the smaller the decrease in the bypass valve opening, and the greater the increase in the fresh air fan's speed.

[0156] In the technical solution of this embodiment, the target control parameters of the fresh air equipment are determined by the real-time ambient temperature and / or real-time ambient humidity, so that the fresh air equipment can quickly reach the set threshold range associated with the operating conditions and ensure control accuracy.

[0157] The present invention also provides a fresh air device, the fresh air device including a memory, a processor, and a control program of the fresh air device stored in the memory and executable on the processor. When the control program of the fresh air device is executed by the processor, it implements the various steps of the control method of the fresh air device as described in the above embodiments.

[0158] The present invention also provides a computer-readable storage medium storing a control program for a fresh air device, wherein the control program for the fresh air device, when executed by a processor, implements the various steps of the control method for the fresh air device as described in the above embodiments.

[0159] 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.

[0160] 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, system, article, or apparatus 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, system, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, system, article, or apparatus that includes that element.

[0161] Through the above description of the embodiments, those skilled in the art can clearly understand that the systems described in the 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 computer-readable 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, parking management device, air conditioner, or network device, etc.) to execute the systems described in the various embodiments of the present invention.

[0162] 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 a fresh air system, characterized in that, The fresh air equipment includes a fresh air ratio adjustment component, which is used to adjust the ratio of return air to fresh air in the air supplied to the room by the fresh air equipment. The fresh air equipment also includes a compressor, an electronic expansion valve, a fresh air heat exchanger, a fresh air fan, and an exhaust fan. The fresh air fan is installed in the fresh air duct. The fresh air equipment further includes a first heat exchange system and a second heat exchange system. The fresh air heat exchanger includes a first fresh air heat exchanger and a second fresh air heat exchanger. The cooling cycle of the first heat exchange system includes a first heat exchanger located in the exhaust duct and a second heat exchanger located in the fresh air duct. The cooling cycle of the second heat exchange system includes a third heat exchanger located in the fresh air duct and a fourth heat exchanger located outdoors. The third heat exchanger is the first fresh air heat exchanger, and the second heat exchanger is the second fresh air heat exchanger. The first and second fresh air heat exchangers are installed in the fresh air duct and arranged sequentially along the airflow direction within the fresh air duct. The method includes: Obtain the energy consumption parameters corresponding to the current moment; When the energy consumption parameter is greater than a preset threshold, the air quality parameter corresponding to the fresh air device is determined; The operating parameters of the fresh air ratio adjustment component are determined based on the air quality parameters, and the fresh air ratio adjustment component is controlled to operate according to the operating parameters. Obtain the set threshold range associated with the current operating condition of the fresh air device; Obtain real-time ambient temperature and / or real-time ambient humidity; Controlling at least one of the following based on the set threshold range, the real-time ambient temperature, and / or the real-time ambient humidity: the operating frequency of the compressor, the opening degree of the electronic expansion valve, the speed of the fresh air fan, and the speed of the exhaust fan; determining the real-time ambient temperature and the real-time ambient humidity, and a third temperature and a third humidity corresponding to the set threshold range; determining the temperature difference between the real-time ambient temperature and the third temperature, and / or determining the humidity difference between the real-time ambient humidity and the third humidity; determining target control parameters based on the temperature difference and / or the humidity difference, the target control parameters including at least one of the operating frequency of the compressor, the opening degree of the electronic expansion valve, the speed of the fresh air fan, and the speed of the exhaust fan; and controlling the operation of the first heat exchange system and / or controlling the operation of the second heat exchange system based on the target control parameters.

2. The control method for the fresh air equipment as described in claim 1, characterized in that, After the step of obtaining the energy consumption parameters corresponding to the current moment, the method further includes: When the energy consumption parameter is less than a preset threshold, the fresh air ratio adjustment component is controlled to operate in 100% fresh air mode.

3. The control method for the fresh air equipment as described in claim 1, characterized in that, The steps for obtaining the energy consumption parameters corresponding to the current moment include: Determine the outdoor and indoor enthalpy values ​​corresponding to the fresh air equipment; The energy consumption parameter is determined based on the difference between the outdoor enthalpy and the indoor enthalpy.

4. The control method for the fresh air equipment as described in claim 1, characterized in that, The step of determining the operating parameters of the fresh air ratio adjustment component based on the air quality parameters includes: When the air quality parameter is greater than a preset first threshold, the operating parameters of the fresh air ratio adjustment component are determined to be the operating parameters of the fresh air mode. When the air quality parameter is less than the preset second threshold, the operating parameters of the fresh air ratio adjustment component are determined to be the operating parameters of the full return air mode; When the air quality parameter is greater than or equal to a preset second threshold and less than or equal to a preset first threshold, the operating parameters of the fresh air ratio adjustment component are determined to be the operating parameters of the mixed air mode, wherein the preset first threshold is greater than the preset second threshold.

5. The control method for the fresh air equipment as described in claim 4, characterized in that, The fresh air ratio adjustment component includes a fresh air valve, an exhaust air valve, and a bypass ventilation valve. The fresh air valve is located in the fresh air duct of the fresh air equipment, the exhaust air valve is located in the exhaust air duct of the fresh air equipment, and the bypass ventilation valve is located between the fresh air duct and the exhaust air duct. The step of controlling the fresh air ratio adjustment component to operate according to the operating parameters includes: The fresh air ratio adjustment component is controlled to operate according to the operating parameters to realize the fresh air equipment in 100% fresh air mode, 100% return air mode, or mixed air mode. In the 100% fresh air mode, the fresh air valve and the exhaust air valve are controlled to open to their maximum opening, and the bypass ventilation valve is controlled to be fully closed; in the full return air mode, the fresh air valve and the exhaust air valve are controlled to be fully closed, and the bypass ventilation valve is controlled to open to its maximum opening; in the mixed air mode, the fresh air valve, the exhaust air valve and the bypass ventilation valve are all controlled to open to a preset opening.

6. The control method for the fresh air equipment as described in claim 1, characterized in that, The set threshold range includes a first set range and a second set range. The step of controlling at least one of the following based on the set threshold range, the real-time ambient temperature and / or the real-time ambient humidity: the operating frequency of the compressor, the opening degree of the electronic expansion valve, the speed of the fresh air fan, and the speed of the exhaust fan. When the real-time ambient temperature and / or the real-time ambient humidity are within a first set range, control the fresh air equipment to increase the operating frequency of the compressor, decrease the opening of the electronic expansion valve, increase the speed of the fresh air fan, and increase the speed of the exhaust fan, at least one of these is performed. When the real-time ambient temperature and / or the real-time ambient humidity are within a second set range, the fresh air equipment is controlled to reduce at least one of the following: reduce the operating frequency of the compressor, increase the opening of the electronic expansion valve, reduce the speed of the fresh air fan, and reduce the speed of the exhaust fan.

7. The control method for the fresh air equipment as described in claim 1, characterized in that, The step of determining the target control parameter based on the temperature difference and / or the humidity difference includes: Obtain the temperature of the first heat exchanger of the first fresh air heat exchanger and the temperature of the second heat exchanger of the second fresh air heat exchanger; Determine the ratio between the temperatures of the first heat exchanger and the second heat exchanger; When both the first fresh air heat exchanger and the second fresh air heat exchanger act as evaporators, and the ratio is greater than a preset ratio, and the temperature difference or the humidity difference is greater than the upper limit of the target value range, the target control parameters are determined to include controlling the first heat exchange system to increase the operating frequency of the compressor and decrease the opening of the electronic expansion valve, and controlling the fresh air equipment to increase the speed of the fresh air fan and the speed of the exhaust fan. When both the first fresh air heat exchanger and the second fresh air heat exchanger act as evaporators, and the ratio is less than a preset ratio, and the temperature difference or the humidity difference is greater than the upper limit of the target value range, the target control parameters are determined to include controlling the second heat exchange system to increase the operating frequency of the compressor, decrease the opening of the electronic expansion valve, and controlling the fresh air equipment to increase the speed of the fresh air fan and the speed of the exhaust fan. When both the first fresh air heat exchanger and the second fresh air heat exchanger act as evaporators, and the ratio is greater than a preset ratio, and the temperature difference or the humidity difference is less than the upper limit of the target value range, the target control parameters are determined to include controlling the first heat exchange system to reduce the operating frequency of the compressor and increase the opening of the electronic expansion valve, and controlling the fresh air equipment to reduce the speed of the fresh air fan and the speed of the exhaust fan. When both the first and second fresh air heat exchangers act as evaporators, and the ratio is less than a preset ratio, and the temperature difference or humidity difference is less than the upper limit of the target value range, the target control parameters are determined to include controlling the second heat exchange system to reduce the operating frequency of the compressor, increasing the opening of the electronic expansion valve, and controlling the fresh air equipment to reduce the speed of the fresh air fan and the speed of the exhaust fan.

8. A fresh air device, characterized in that, The fresh air device includes a memory, a processor, and a control program for the fresh air device stored in the memory and executable on the processor. When the control program for the fresh air device is executed by the processor, it implements the various steps of the control method for the fresh air device as described in any one of claims 1-7.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a control program for a fresh air device, which, when executed by a processor, implements the various steps of the control method for the fresh air device as described in any one of claims 1-7.

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