Fresh air equipment control method and device, storage medium and fresh air equipment

Abstract

The application belongs to the technical field of fresh air equipment, and discloses a fresh air equipment control method and device, a storage medium and fresh air equipment. The fresh air equipment comprises a first heat exchange system and a second heat exchange system. The method adjusts the operation parameters of the first heat exchange system and the second heat exchange system in the fresh air equipment according to the target operation mode when a mode setting instruction is received, thereby improving the energy efficiency of the fresh air equipment. Since multiple heat exchange systems are arranged in the fresh air equipment, the operation mode combination of the first heat exchange system and the second heat exchange system can meet the air outlet temperature requirements in different seasons throughout the year, and the operation state of the first heat exchange system and the second heat exchange system can be adjusted according to the target operation mode, so that the fresh air equipment is in a high energy efficiency state, and the fresh air equipment can meet the heating and temperature adjustment requirements while ensuring the efficiency.

Description

[0001] This invention patent application is a divisional application of Chinese invention patent application filed on November 24, 2021, with application number 202111417547.8 and title "Fresh Air Equipment Control Method, Device, Storage Medium and Fresh Air Equipment". Technical Field

[0002] This invention relates to the field of fresh air equipment technology, and in particular to a fresh air equipment control method, device, storage medium, and fresh air equipment. Background Technology

[0003] Nowadays, with the improvement of living standards, the requirements for indoor thermal environment are no longer just about temperature, but have risen to the level of health needs, placing higher demands on freshness and cleanliness. Fresh air systems are increasingly being used as an effective and important solution.

[0004] Traditional room air conditioners, limited by price, installation, and size, only filter fresh air before directly delivering it into the room, with the air conditioner handling the load. On the other hand, with the development of building energy conservation and improved airtightness, ultra-low energy consumption buildings are becoming increasingly common. Fresh air systems, as key indoor environmental treatment equipment, no longer only need to clean the fresh air but also handle its temperature and humidity. Regardless of the type of fresh air equipment, all add heat and humidity treatment to the existing indoor heat and humidity environment management, leading to increased energy consumption. Therefore, some energy-saving solutions for fresh air systems have emerged during their development. Currently, mature product solutions mainly include total heat exchange recovery, heat pump reheat recovery, or dual-source pre-cooling dehumidification separation, etc.

[0005] However, while total heat exchange recovery can achieve heat and moisture recovery, it suffers from drawbacks such as high processing difficulty, large size, high air resistance, susceptibility to clogging, easy icing in winter, high fan energy consumption, high cost, and efficiency limited by indoor and outdoor temperature differences. Heat pump reheat recovery can improve heat pump efficiency, but it is only highly efficient in cooling and dehumidification, and most are only single-stage reheat recovery systems with limited fresh air temperature control capabilities, failing to simultaneously achieve dehumidification and energy saving. Dual-source pre-cooling and dehumidification separation can improve energy waste in cooling and dehumidification, but its fresh air temperature control capabilities are limited, and the water-cooled scheme itself suffers from heat loss due to secondary heat exchange, resulting in wasted cooling heat. It only improves the fresh air handling efficiency but shifts the energy consumption to the chiller unit.

[0006] None of the above solutions can adequately meet the heating and temperature control requirements. In winter, electric auxiliary heating is used for heating, or it is used in conjunction with total heat exchange. However, the problem of total heat exchanger freezing at low temperature and high humidity still needs to be solved, so the efficiency is very low in winter.

[0007] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0008] The main objective of this invention is to provide a fresh air equipment control method, device, storage medium, and fresh air equipment, aiming to solve the technical problem that existing fresh air equipment cannot effectively meet heating and temperature control needs and is inefficient.

[0009] To achieve the above objectives, the present invention provides a fresh air equipment control method, which is applied to a fresh air equipment. The fresh air equipment includes: a first heat exchange system and a second heat exchange system. The first heat exchange system is used for heat exchange between the fresh air duct and the outdoor environment, and the second heat exchange system is used for heat exchange between the fresh air duct and the exhaust duct.

[0010] The method includes the following steps:

[0011] The fresh air equipment control method includes the following steps:

[0012] Obtain the target operating mode; and

[0013] Adjust the operating status of the first heat exchange system and the second heat exchange system according to the target operating mode so that the fresh air equipment is in a high-efficiency state.

[0014] Optionally, the first heat exchange system includes a first fresh air heat exchanger and a second fresh air heat exchanger disposed in the fresh air duct, and the second heat exchange system includes a third fresh air heat exchanger and a fourth fresh air heat exchanger disposed in the fresh air duct.

[0015] The step of adjusting the operating states of the first heat exchange system and the second heat exchange system according to the target operating mode to enable the fresh air equipment to operate in a high-efficiency state includes:

[0016] When the target operating mode is cooling mode, the operating modes of the first heat exchange system and the second heat exchange system are adjusted to cooling mode; and

[0017] The first, second, third, and fourth fresh air heat exchangers are controlled to operate as evaporators so that the fresh air equipment is in a high-efficiency state.

[0018] Optionally, the fresh air equipment further includes an outdoor heat exchanger installed in the outdoor environment, a second fan installed in the fresh air duct, and a third fan installed in the exhaust duct; the first heat exchange system further includes a first compressor, a first four-way valve, a first throttling element, a second throttling element, and an outdoor heat exchanger, wherein the first compressor, the first four-way valve, the outdoor heat exchanger, the first throttling element, the first fresh air heat exchanger, the second throttling element, and the second fresh air heat exchanger are connected in series; the second heat exchange system further includes a second compressor, a second four-way valve, a third throttling element, a fourth throttling element, and an exhaust heat exchanger, wherein the second compressor, the second four-way valve, the exhaust heat exchanger, the third throttling element, the third fresh air heat exchanger, the fourth throttling element, and the fourth fresh air heat exchanger are connected in series.

[0019] After the step of controlling the first, second, third, and fourth fresh air heat exchangers to operate as evaporators to ensure the fresh air equipment is in a high-efficiency state, the method further includes:

[0020] Obtain the first operating temperature parameter and the first target temperature parameter; and

[0021] When the first operating temperature parameter is less than the first target temperature parameter, at least one of the following is performed: reducing the speed of the first compressor, increasing the opening of the first throttling element, reducing the speed of the second fan, decreasing the speed of the second compressor, and increasing the opening of the third throttling element.

[0022] When the first operating temperature parameter is greater than the first target temperature parameter, at least one of the following is performed: increasing the speed of the first compressor, decreasing the opening of the first throttling element, increasing the speed of the first fan, increasing the speed of the third fan, increasing the speed of the second compressor, and decreasing the opening of the third throttling element.

[0023] Optionally, the first heat exchange system includes a first fresh air heat exchanger and a second fresh air heat exchanger disposed in the fresh air duct, and the second heat exchange system includes a third fresh air heat exchanger and a fourth fresh air heat exchanger disposed in the fresh air duct.

[0024] The step of adjusting the operating states of the first heat exchange system and the second heat exchange system according to the target operating mode to enable the fresh air equipment to operate in a high-efficiency state includes:

[0025] When the target operating mode is dehumidification mode or reheat dehumidification mode, the operating mode of the first heat exchange system and the second heat exchange system is adjusted to cooling mode.

[0026] Control the first fresh air heat exchanger to operate as a condenser, and the second fresh air heat exchanger to operate as an evaporator; and

[0027] The third fresh air heat exchanger is controlled to operate as a condenser, and the fourth fresh air heat exchanger is controlled to operate as an evaporator, so that the fresh air equipment is in a high-efficiency state.

[0028] Optionally, the fresh air equipment further includes an outdoor heat exchanger installed in the outdoor environment, a second fan installed in the fresh air duct, and a third fan installed in the exhaust duct; the first heat exchange system further includes a first compressor, a first four-way valve, a first throttling element, a second throttling element, and an outdoor heat exchanger, wherein the first compressor, the first four-way valve, the outdoor heat exchanger, the first throttling element, the first fresh air heat exchanger, the second throttling element, and the second fresh air heat exchanger are connected in series; the second heat exchange system further includes a second compressor, a second four-way valve, a third throttling element, a fourth throttling element, and an exhaust heat exchanger, wherein the second compressor, the second four-way valve, the exhaust heat exchanger, the third throttling element, the third fresh air heat exchanger, the fourth throttling element, and the fourth fresh air heat exchanger are connected in series.

[0029] After the step of controlling the third fresh air heat exchanger to operate as a condenser and the fourth fresh air heat exchanger to operate as an evaporator, so that the fresh air equipment is in a high-efficiency state, the method further includes:

[0030] Obtain operating humidity parameters and target humidity parameters;

[0031] When the operating humidity parameter is less than the target humidity parameter, at least one of the following is performed: reducing the speed of the first compressor, increasing the opening of the second throttling element, decreasing the speed of the second compressor, and increasing the opening of the fourth throttling element.

[0032] When the operating humidity parameter is greater than the target humidity parameter, at least one of the following is performed: increasing the speed of the first compressor, decreasing the opening of the second throttling element, increasing the speed of the second compressor, and decreasing the opening of the fourth throttling element.

[0033] Optionally, after the step of reducing the speed of the first compressor, increasing the opening of the first throttling element, reducing the speed of the second fan, decreasing the speed of the second compressor, and increasing the opening of the third throttling element when the operating humidity parameter is less than the target humidity parameter, the method further includes:

[0034] Obtain the second operating temperature parameter and the second target temperature parameter;

[0035] When the second operating temperature parameter is less than the second target temperature parameter, at least one of the following is performed: reducing the speed of the third fan, increasing the speed of the second compressor, and reducing the opening of the fourth throttling element.

[0036] When the second operating temperature parameter is greater than the second target temperature parameter, at least one of the following is adopted: increasing the speed of the third fan, decreasing the speed of the second compressor, and increasing the opening of the fourth throttling element.

[0037] Optionally, the first heat exchange system includes a first fresh air heat exchanger and a second fresh air heat exchanger disposed in the fresh air duct, and the second heat exchange system includes a third fresh air heat exchanger and a fourth fresh air heat exchanger disposed in the fresh air duct.

[0038] The step of adjusting the operating states of the first heat exchange system and the second heat exchange system according to the target operating mode to put the fresh air equipment in a high-efficiency state includes:

[0039] When the target operating mode is heating mode, the operating modes of the first heat exchange system and the second heat exchange system are adjusted to heating mode; and

[0040] The first, second, third, and fourth fresh air heat exchangers are controlled to operate as condensers so that the fresh air equipment is in a high-efficiency state.

[0041] Optionally, the fresh air equipment further includes an outdoor heat exchanger installed in the outdoor environment, a second fan installed in the fresh air duct, and a third fan installed in the exhaust duct; the first heat exchange system further includes a first compressor, a first four-way valve, a first throttling element, a second throttling element, and an outdoor heat exchanger, wherein the first compressor, the first four-way valve, the outdoor heat exchanger, the first throttling element, the first fresh air heat exchanger, the second throttling element, and the second fresh air heat exchanger are connected in series; the second heat exchange system further includes a second compressor, a second four-way valve, a third throttling element, a fourth throttling element, and an exhaust heat exchanger, wherein the second compressor, the second four-way valve, the exhaust heat exchanger, the third throttling element, the third fresh air heat exchanger, the fourth throttling element, and the fourth fresh air heat exchanger are connected in series.

[0042] After the step of controlling the first, second, third, and fourth fresh air heat exchangers to operate as condensers, thereby increasing the condenser area of ​​the fresh air equipment and thus improving the energy efficiency of the fresh air equipment, the method further includes:

[0043] Obtain the third operating temperature parameter and the third target temperature parameter; and

[0044] When the third operating temperature parameter is less than the third target temperature parameter, at least one of the following is performed: increasing the speed of the first compressor, decreasing the opening of the first throttling element, increasing the speed of the first fan, increasing the speed of the third fan, increasing the speed of the second compressor, and decreasing the opening of the third throttling element.

[0045] When the third operating temperature parameter is greater than the third target temperature parameter, at least one of the following is performed: reducing the speed of the first compressor, increasing the opening of the first throttling element, reducing the speed of the second fan, decreasing the speed of the second compressor, and increasing the opening of the third throttling element.

[0046] Furthermore, to achieve the above objectives, the present invention also proposes a fresh air equipment control device, which includes the following modules:

[0047] The instruction receiving module is used to obtain the target operating mode;

[0048] The parameter adjustment module is used to adjust the operating status of the first heat exchange system and the second heat exchange system according to the target operating mode, so that the fresh air equipment is in a high-efficiency state.

[0049] In addition, to achieve the above objectives, the present invention also proposes a storage medium storing a fresh air equipment control program, which, when executed by a processor, implements the fresh air equipment control method as described above.

[0050] Furthermore, to achieve the above objectives, the present invention also proposes a fresh air device, which includes: a first heat exchange system and a second heat exchange system, wherein the first heat exchange system is used for heat exchange between the fresh air duct and the outdoor environment, and the second heat exchange system is used for heat exchange between the fresh air duct and the exhaust duct; the fresh air device further includes: a memory, a processor, and a fresh air device control program stored in the memory and executable on the processor, wherein when the fresh air device control program is executed by the processor, it implements the fresh air device control method described above.

[0051] This invention relates to a fresh air system comprising a first heat exchange system and a second heat exchange system. By receiving a mode setting command, the system determines a target operating mode based on the command and adjusts the operating parameters of the first and second heat exchange systems according to this target mode, thereby improving the energy efficiency of the fresh air system. Since multiple heat exchange systems are incorporated into the fresh air system, adjusting the combination of the operating modes of the first and second heat exchange systems according to the target mode can meet the outlet air temperature requirements for different seasons throughout the year. Furthermore, the operating states of the first and second heat exchange systems can be adjusted according to the target mode, ensuring the fresh air system operates at high energy efficiency. This allows the fresh air system to simultaneously meet heating and temperature control needs while maintaining high efficiency. Attached Figure Description

[0052] Figure 1 This is a schematic diagram of the structure of an electronic device in the hardware operating environment involved in the embodiments of the present invention;

[0053] Figure 2 This is a flowchart illustrating the first embodiment of the fresh air equipment control method of the present invention;

[0054] Figure 3 This is a schematic diagram of a fresh air system according to an embodiment of the present invention;

[0055] Figure 4 This is a flowchart illustrating the second embodiment of the fresh air equipment control method of the present invention;

[0056] Figure 5 This is a flowchart illustrating the third embodiment of the fresh air equipment control method of the present invention;

[0057] Figure 6 This is a flowchart illustrating the fourth embodiment of the fresh air equipment control method of the present invention;

[0058] Figure 7 This is a structural block diagram of the first embodiment of the fresh air equipment control device of the present invention.

[0059] label name label name C1 First compressor C2 Second compressor V1 First four-way valve V2 Second four-way valve H1 Outdoor heat exchanger H2 First Fresh Air Heat Exchanger H3 Second fresh air heat exchanger H4 Exhaust heat exchanger H5 Third fresh air heat exchanger H6 Fourth fresh air heat exchanger K1 First throttling element K2 Second throttling element K3 Third throttling element K4 Fourth throttling element 10 Fresh air duct 20 Exhaust duct Y1 First Wind Turbine Y2 Second fan Y3 Third fan

[0060] 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

[0061] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0062] Reference Figure 1 , Figure 1 This is a schematic diagram of the structure of the fresh air equipment in the hardware operating environment involved in the embodiment of the present invention.

[0063] like Figure 1As shown, the electronic device may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen or an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wireless-Fidelity (Wi-Fi) interface). The memory 1005 may be high-speed random access memory (RAM) or stable non-volatile memory (NVM), such as a disk drive. The memory 1005 may also optionally be a storage device independent of the aforementioned processor 1001.

[0064] Those skilled in the art will understand that Figure 1 The structure shown does not constitute a limitation on the electronic device and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0065] like Figure 1 As shown, the memory 1005, which serves as a storage medium, may include an operating system, a network communication module, a user interface module, and a fresh air equipment control program.

[0066] exist Figure 1 In the electronic device shown, the network interface 1004 is mainly used to connect to the external network and communicate with other network devices; the user interface 1003 is mainly used to connect to the user equipment and communicate with the user equipment; the electronic device of the present invention calls the fresh air equipment control program stored in the memory 1005 through the processor 1001 and executes the fresh air equipment control method provided in the embodiment of the present invention.

[0067] This invention provides a method for controlling a fresh air system, referring to... Figure 2 , Figure 2 This is a flowchart illustrating the first embodiment of a fresh air equipment control method according to the present invention.

[0068] In this embodiment, for ease of understanding, refer to Figure 3 To illustrate, Figure 3 A schematic diagram of a fresh air system, such as Figure 3As shown, the fresh air equipment can have a first heat exchange system and a second heat exchange system. The first heat exchange system may include a first compressor C1, a first four-way valve V1, an outdoor heat exchanger H1, a first fresh air heat exchanger H2, a second fresh air heat exchanger H3, a first throttling element K1, and a second throttling element K2. The second heat exchange system may include a second compressor C2, a second four-way valve V2, an exhaust heat exchanger H4, a third fresh air heat exchanger H5, a fourth fresh air heat exchanger H6, a third throttling element K3, and a fourth throttling element K4. The first throttling element K1, the second throttling element K2, the third throttling element K3, and the fourth throttling element K4 can be electronic expansion valves.

[0069] Furthermore, the first and second heat exchange systems can share a multi-cylinder compressor. Specifically, the fresh air unit includes a compressor with two independent cylinders. The first cylinder of this compressor is connected to a first four-way valve V1, an outdoor heat exchanger H1, a first fresh air heat exchanger H2, a second fresh air heat exchanger H3, a first throttling element K1, and a second throttling element K2, forming the first heat exchange system. The second cylinder of this compressor is connected to a second four-way valve V2, an exhaust heat exchanger H4, a third fresh air heat exchanger H5, a fourth fresh air heat exchanger H6, a third throttling element K3, and a fourth throttling element K4, forming the second heat exchange system.

[0070] It should be noted that the fresh air system also includes a fresh air duct 10 and an exhaust duct 20. The fresh air duct 10 is used to supply air from the outdoor environment to the indoor environment, and the exhaust duct 20 is used to supply air from the indoor environment to the outdoor environment. The outdoor heat exchanger in the first heat exchange system can be located in the outdoor environment, and the first fresh air heat exchanger H2 and the second fresh air heat exchanger H3 can be located within the aforementioned fresh air duct 10 to achieve heat exchange between the fresh air duct 10 and the exhaust duct 20. Correspondingly, the first heat exchange system also includes a first fan Y1 corresponding to the outdoor heat exchanger H1, which is used to achieve heat exchange between the refrigerant in the outdoor heat exchanger H1 and the outdoor environment. A second fan Y2 is also installed in the fresh air duct, which is used to draw air from the outdoor environment into the fresh air duct 10. A third fan Y3 is also installed in the exhaust duct 20, which is used to draw air from the indoor environment into the exhaust duct 20.

[0071] The working principle of the above-mentioned fresh air equipment is as follows: The second fan Y2 draws fresh air from the outdoor environment. The fresh air undergoes four heat exchanges in sequence through the second fresh air heat exchanger H3, the fourth fresh air heat exchanger H6, the first fresh air heat exchanger H2, and the third fresh air heat exchanger H5 before being delivered to the indoor environment. The third fan Y3 draws exhaust air from the indoor environment. The exhaust air undergoes one heat exchange through the exhaust air heat exchanger H4 before being delivered outdoors. The fresh air system can have a cooling mode, a heating mode, and a reheat dehumidification mode. The cooling mode refers to the process of cooling the fresh air before it is delivered indoors through the second fresh air heat exchanger H3, the fourth fresh air heat exchanger H6, the first fresh air heat exchanger H2, and the third fresh air heat exchanger H5. The heating mode refers to the process of heating the fresh air before it is delivered indoors through the second fresh air heat exchanger H3, the fourth fresh air heat exchanger H6, the first fresh air heat exchanger H2, and the third fresh air heat exchanger H5. The reheat dehumidification mode refers to the process of first cooling and dehumidifying the fresh air through the second fresh air heat exchanger H3, the fourth fresh air heat exchanger H6, the first fresh air heat exchanger H2, and the third fresh air heat exchanger H5, then heating it before it is delivered indoors.

[0072] It should be noted that, in order to ensure different outlet air temperatures and meet energy-saving requirements, the area of ​​the heat exchangers needs to be limited. Specifically, the area of ​​the first fresh air heat exchanger H2 should be less than or equal to 50% of the area of ​​the outdoor heat exchanger H1, and the area of ​​the third fresh air heat exchanger H5 should be less than or equal to 150% of the area of ​​the exhaust heat exchanger H4. The fresh air system may also include more or fewer components than shown in the diagram, or certain components may be combined to achieve different component arrangements. For example, more stages of heat exchange systems may be set up in the fresh air system, or the number of heat exchangers in each heat exchange system may be increased.

[0073] In this embodiment, the fresh air equipment control method includes the following steps:

[0074] Step S10: Obtain the target operating mode.

[0075] It should be noted that the execution subject in this embodiment is the aforementioned fresh air equipment, which may include a fresh air unit and an air conditioner with fresh air function. Typically, the operation of each component in the fresh air equipment can be driven by a core controller. Therefore, the execution subject in this embodiment can also be the core controller within the aforementioned fresh air equipment. This core controller can be the aforementioned processor. This embodiment describes the core controller as the execution subject.

[0076] It should be noted that the mode setting command can be a command sent by the user to the core controller of the fresh air equipment when the user controls the fresh air equipment to change the operating mode via remote control or other means, or it can be a command automatically generated and sent to the core controller by the fresh air equipment when it determines that a mode change is needed based on the surrounding environmental information.

[0077] It is understandable that the mode setting command can include a mode identifier parameter. By parsing the mode setting command, the mode identifier parameter can be obtained, and the target operating mode can be determined based on the mode identifier parameter.

[0078] Step S20: Adjust the operating status of the first heat exchange system and the second heat exchange system according to the target operating mode so that the fresh air equipment is in a high-efficiency state.

[0079] It should be noted that, since the fresh air equipment involved in this embodiment has a first heat exchange system and a second heat exchange system compared with conventional fresh air equipment, in order to ensure that the fresh air equipment operates with high energy efficiency, it is necessary to select different control methods according to the target operating mode to adjust the operating parameters of the first heat exchange system and the second heat exchange system, and adjust the operating status of each component in the first heat exchange system and the second heat exchange system, thereby improving the energy efficiency and enabling the fresh air equipment to operate in a high energy efficiency state.

[0080] This embodiment of the fresh air system includes a first heat exchange system and a second heat exchange system. By receiving a mode setting command, the system determines the target operating mode based on the command and adjusts the operating parameters of the first and second heat exchange systems according to the target operating mode, thereby improving the energy efficiency of the fresh air system. Since multiple heat exchange systems are installed in the fresh air system, adjusting the combination of the operating modes of the first and second heat exchange systems according to the target operating mode can meet the outlet air temperature requirements for different seasons throughout the year. Furthermore, the operating states of the first and second heat exchange systems can be adjusted according to the target operating mode, keeping the fresh air system in a high-efficiency state. This allows the fresh air system to simultaneously meet heating and temperature control needs while ensuring high efficiency.

[0081] refer to Figure 4 , Figure 4 This is a flowchart illustrating a second embodiment of a fresh air equipment control method according to the present invention.

[0082] Based on the first embodiment described above, step S20 of the fresh air equipment control method in this embodiment may include:

[0083] Step S201: When the target operating mode is cooling mode, adjust the operating mode of the first heat exchange system and the second heat exchange system to cooling mode.

[0084] It should be noted that if the target operating mode is cooling mode, it means that the fresh air taken in by the fresh air equipment needs to be cooled. In this case, the first heat exchange system and the second heat exchange system can be adjusted to operate in cooling mode.

[0085] Understandably, in order to ensure normal airflow and improve heat exchange efficiency during normal operation of the heat exchange system, it is also possible to check whether the second and third fans in the fresh air equipment are running before adjusting the operating modes of the first and second heat exchange systems. If the second and / or third fans are not running, the second and / or third fans can be started.

[0086] In practical applications, the operating mode of the first heat exchange system can be changed to cooling mode by adjusting the first four-way valve in the first heat exchange system. For example: Figure 3 For example, by adjusting the state of the first four-way valve V1, the refrigerant circulation direction in the first heat exchange system is changed, so that the refrigerant circulation direction in the first heat exchange system becomes: first compressor C1 - first four-way valve V1 - outdoor heat exchanger H1 - first throttling element K1 - first fresh air heat exchanger H2 - second throttling element K2 - second fresh air heat exchanger H3 - first four-way valve V1 - first compressor C1, thereby making the first heat exchange system operate in cooling mode.

[0087] In practical applications, the operating mode of the second heat exchange system can be changed to cooling mode by adjusting the second four-way valve in the second heat exchange system. For example: Figure 3 For example, by adjusting the state of the second four-way valve V2, the refrigerant circulation direction in the second heat exchange system is changed, so that the refrigerant circulation direction in the second heat exchange system becomes: second compressor C2 - second four-way valve V2 - exhaust heat exchanger H4 - third throttling element K3 - third fresh air heat exchanger H5 - fourth throttling element K4 - fourth fresh air heat exchanger H6 - second four-way valve V2 - second compressor C2, thereby making the second heat exchange system operate in cooling mode.

[0088] Step S202: Control the first fresh air heat exchanger, the second fresh air heat exchanger, the third fresh air heat exchanger and the fourth fresh air heat exchanger to operate as evaporators so that the fresh air equipment is in a high-efficiency state.

[0089] It is understandable that the first and second fresh air heat exchangers in the first heat exchange system, as well as the third and fourth fresh air heat exchangers in the second heat exchange system, all operate as evaporators, absorbing heat from the fresh air to cool it down. This can significantly increase the area of ​​the evaporator that the fresh air contacts, improve the energy efficiency when cooling the fresh air, and thus improve the energy efficiency of the fresh air equipment.

[0090] In practical implementation, the first throttling element of the first heat exchange system can be controlled to work, throttling and reducing pressure, and the second throttling component can be controlled to stop working or open the bypass, so that the first fresh air heat exchanger and the second fresh air heat exchanger can operate as evaporators to cool the fresh air, increase the evaporator area of ​​the first heat exchange system, increase the evaporation temperature of the first heat exchange system, and thus improve the energy efficiency of the first heat exchange system.

[0091] In practical implementation, the third throttling element in the second heat exchange system can be controlled to operate, reducing pressure and throttling. The fourth throttling element can be controlled to stop operating or bypass, allowing both the third and fourth fresh air heat exchangers to function as evaporators, cooling the fresh air, increasing the evaporator area of ​​the second heat exchange system, and raising its evaporation temperature, thereby improving the system's energy efficiency. Alternatively, both the third and fourth throttling elements can be controlled to open, reducing pressure and throttling, but with the third throttling element's opening greater than the fourth, thus increasing the evaporation temperature and improving the system's energy efficiency.

[0092] In practical use, in order to ensure the comfort of users of the fresh air equipment and improve the user experience, after step S202 in this embodiment, the first operating temperature parameter and the first target temperature parameter can also be obtained; the first operating temperature parameter and the first target temperature parameter are used to determine whether the cooling capacity is too high, and the operating parameters of the fresh air equipment are adjusted according to the determination result.

[0093] It should be noted that the first operating temperature parameter can be any one or more of the indoor temperature, the supply air temperature, or the fresh air temperature. The indoor temperature can be the temperature in the room served by the fresh air equipment, the supply air temperature can be the temperature of the air supplied by the fresh air equipment when it supplies air to the room, and the fresh air temperature can be the temperature of the fresh air drawn in by the fresh air equipment.

[0094] In practical use, if the first operating temperature parameter is greater than the first target temperature parameter, the result is that the cooling capacity is too low; if the first operating temperature parameter is less than the first target temperature parameter, the result is that the cooling capacity is too high. The first target temperature parameter can be set by the user or preset by the administrator of the fresh air system. The first target temperature parameter corresponds to the cooling mode, and this embodiment does not impose any restrictions on this.

[0095] Understandably, if the cooling capacity is too high, the operating parameters of the fresh air system need to be adjusted to reduce its cooling capacity; if the cooling capacity is too low, the operating parameters need to be adjusted to increase its cooling capacity, thereby ensuring that the indoor temperature meets the user's actual needs and improving user comfort.

[0096] In practice, if the cooling capacity is too high, i.e. the first operating temperature parameter is less than the first target temperature parameter, the cooling capacity of the fresh air equipment needs to be reduced. Therefore, at least one of the following can be executed: reducing the speed of the compressor in the first heat exchange system or the second heat exchange system, increasing the opening of the first throttling component in the first heat exchange system, increasing the opening of the second throttling component in the second heat exchange system, or reducing the speed of the second fan in the fresh air equipment, thereby reducing the cooling capacity of the fresh air equipment. Among these, the priority of adjusting the first heat exchange system is higher than that of the second heat exchange system.

[0097] In practice, if the cooling capacity is too low, i.e. the first operating temperature parameter is greater than or equal to the first target temperature parameter, the cooling capacity of the fresh air equipment needs to be increased. Therefore, at least one of the following can be executed: increasing the compressor speed of the first or second heat exchange system, decreasing the opening of the first throttling component in the first heat exchange system, decreasing the opening of the third throttling component in the second heat exchange system, increasing the speed of the third fan in the second heat exchange system, or increasing the speed of the first fan in the first heat exchange system, thereby increasing the cooling capacity of the fresh air equipment. Among these, the adjustment of the second heat exchange system has a higher priority than that of the first heat exchange system.

[0098] In this embodiment, the range of the first target temperature parameter can be determined based on the first operating temperature parameter. For example, if the first operating temperature parameter is the indoor temperature, the range of the first target temperature parameter can be 15-32℃; if the first operating temperature parameter is the fresh air temperature, the range of the first target temperature parameter can be 10-50℃; if the first operating temperature parameter is the outlet air temperature, the range of the first target temperature parameter can be 5-32℃.

[0099] This embodiment adjusts the operating parameters of each component in the first and second heat exchange systems when the target operating mode is determined to be cooling mode. This causes the fresh air heat exchangers in both systems to operate as evaporators to cool the fresh air, thereby increasing the evaporator area in the fresh air equipment and improving its operating energy efficiency in cooling mode.

[0100] refer to Figure 5 , Figure 5 This is a flowchart illustrating a third embodiment of a fresh air equipment control method according to the present invention.

[0101] Based on the first embodiment described above, step S20 of the fresh air equipment control method in this embodiment may include:

[0102] Step S201': When the target operating mode is dehumidification mode or reheat dehumidification mode, adjust the operating mode of the first heat exchange system and the second heat exchange system to cooling mode.

[0103] It should be noted that if the target operating mode is dehumidification mode or reheat dehumidification mode, it means that the fresh air drawn into the fresh air unit needs to be cooled and dehumidified before being heated. In this case, the first and second heat exchange systems can be adjusted to operate in cooling mode. Similarly, before adjusting the operating modes of the first and second heat exchange systems, it is also possible to check whether the second and third fans are turned on. If the second and / or third fans are not turned on, start the second and / or third fans.

[0104] In practical applications, the operating mode of the first heat exchange system can be changed to cooling mode by adjusting the first four-way valve in the first heat exchange system. For example: Figure 3 For example, by adjusting the state of the first four-way valve V1, the refrigerant circulation direction in the first heat exchange system is changed, so that the refrigerant circulation direction in the first heat exchange system becomes: first compressor C1 - first four-way valve V1 - outdoor heat exchanger H1 - first throttling element K1 - first fresh air heat exchanger H2 - second throttling element K2 - second fresh air heat exchanger H3 - first four-way valve V1 - first compressor C1, thereby making the first heat exchange system operate in cooling mode.

[0105] In practical applications, the operating mode of the second heat exchange system can be changed to cooling mode by adjusting the second four-way valve in the second heat exchange system. For example: Figure 3 For example, by adjusting the state of the second four-way valve V2, the refrigerant circulation direction in the second heat exchange system is changed, so that the refrigerant circulation direction in the second heat exchange system becomes: second compressor C2 - second four-way valve V2 - exhaust heat exchanger H4 - third throttling element K3 - third fresh air heat exchanger H5 - fourth throttling element K4 - fourth fresh air heat exchanger H6 - second four-way valve V2 - second compressor C2, thereby making the second heat exchange system operate in cooling mode.

[0106] Step S202': Control the first fresh air heat exchanger to operate as a condenser and the second fresh air heat exchanger to operate as an evaporator.

[0107] In practical implementation, the first throttling element in the first heat exchange system can be controlled to stop working or open the bypass, and the second throttling element can be controlled to work to throttle and reduce pressure, so that the first fresh air heat exchanger operates as a condenser to preheat the fresh air, and the second fresh air heat exchanger operates as an evaporator to cool and dehumidify the fresh air, thereby reducing the condensation temperature, increasing the subcooling, and thus improving the energy efficiency of the first heat exchange system.

[0108] Step S203': Control the third fresh air heat exchanger to operate as a condenser and the fourth fresh air heat exchanger to operate as an evaporator, so that the fresh air equipment is in a high-efficiency state.

[0109] In practical implementation, the third throttling element in the second heat exchange system can be controlled to stop working or open the bypass, and the fourth throttling element can be controlled to work to throttle and reduce pressure, so that the third fresh air heat exchanger operates as a condenser to reheat the fresh air, and the fourth fresh air heat exchanger operates as an evaporator to cool and dehumidify the fresh air, reduce the condensation temperature, and increase the subcooling, thereby improving the energy efficiency of the second heat exchange system and putting the fresh air equipment in a high-efficiency state.

[0110] In practical use, in order to ensure the comfort of users of the fresh air equipment and improve the user experience, after step S203' in this embodiment, the operating humidity parameter, target humidity parameter, second operating temperature parameter and second target temperature parameter can also be obtained; and the operating status of the fresh air equipment can be adjusted according to the operating humidity parameter, target humidity parameter, second operating temperature parameter and second target temperature parameter.

[0111] It should be noted that the second operating temperature parameter can be any one or more of the indoor temperature, the supply air temperature, or the fresh air temperature. The operating humidity parameter can be the indoor humidity, the supply air humidity, or the fresh air humidity. The indoor humidity can be the humidity of the room served by the fresh air equipment, the supply air humidity can be the humidity of the air supplied by the fresh air equipment to the room, and the fresh air humidity can be the humidity of the fresh air drawn in by the fresh air equipment.

[0112] In practical use, the operating humidity parameter can be compared with the target humidity parameter first. Based on the humidity comparison result, it can be determined whether the operating parameters of the fresh air system need to be adjusted. Then, based on the humidity comparison result, it can be determined whether the second temperature operating parameter needs to be compared with the second target temperature parameter. Finally, based on the temperature comparison result, it can be determined whether further adjustments to the operating parameters of the fresh air system are needed. The second target temperature parameter and the target humidity parameter correspond to the reheat dehumidification mode and can be set by the user or preset by the fresh air system administrator.

[0113] For example: Compare the operating humidity parameter with the target humidity parameter. If the operating humidity parameter is greater than the target humidity parameter, execute at least one of the following: increase the compressor speed in the first or second heat exchange system, decrease the opening of the second throttling element in the first heat exchange system, or decrease the opening of the fourth throttling element in the second heat exchange system. In this case, it is not necessary to compare the second operating temperature parameter with the second target temperature parameter. If the operating humidity parameter is less than the target humidity parameter, execute at least one of the following: decrease the compressor speed in the first or second heat exchange system, increase the opening of the second throttling element in the first heat exchange system, or increase the opening of the fourth throttling element in the second heat exchange system. In this case, the second operating temperature parameter can be compared with the second target temperature parameter. If the second operating temperature parameter is greater than the second target temperature parameter, execute at least one of the following: increase the speed of the third fan in the fresh air equipment, decrease the compressor speed in the second heat exchange system, or increase the opening of the fourth throttling element in the second heat exchange system. If the second operating temperature parameter is less than the second target temperature parameter, execute at least one of the following: decrease the speed of the third fan in the fresh air equipment, increase the compressor speed in the second heat exchange system, or decrease the opening of the fourth throttling element in the second heat exchange system.

[0114] In this embodiment, the range of the second target temperature parameter can be determined based on the second operating temperature parameter. For example, if the second operating temperature parameter is the indoor temperature, the range of the second target temperature parameter can be 15-32℃; if the second operating temperature parameter is the fresh air temperature, the range of the second target temperature parameter can be 10-50℃; if the second operating temperature parameter is the outlet air temperature, the range of the second target temperature parameter can be 5-32℃. The range of the target humidity parameter can be determined based on the operating humidity parameter. For example, if the operating humidity parameter is the indoor humidity content, the range of the target humidity parameter can be 5-14g / kg; if the operating humidity parameter is the outlet air humidity content, the range of the target humidity parameter can be 5-16g / kg; if the operating humidity parameter is the fresh air humidity content, the range of the target humidity parameter can be 5-18g / kg.

[0115] This embodiment adjusts the operating parameters of each component in the first and second heat exchange systems when the target operating mode is determined to be dehumidification and reheat mode. This causes the first fresh air heat exchanger in the first heat exchange system to operate as a condenser to preheat the fresh air, the second fresh air heat exchanger to operate as an evaporator to cool and dehumidify the fresh air, the third fresh air heat exchanger in the second heat exchange system to operate as a condenser to reheat the fresh air, and the fourth fresh air heat exchanger to operate as an evaporator to cool and dehumidify the fresh air. This achieves dehumidification and reheating of the fresh air, meeting the indoor demand for dehumidification and reheating.

[0116] refer to Figure 6 , Figure 6 This is a flowchart illustrating the fourth embodiment of a fresh air equipment control method according to the present invention.

[0117] Based on the first embodiment described above, step S20 of the fresh air equipment control method in this embodiment may include:

[0118] Step S201”: When the target operating mode is heating mode, adjust the operating mode of the first heat exchange system and the second heat exchange system to heating mode.

[0119] It should be noted that if the target operating mode is heating mode, it means that the fresh air taken in by the fresh air equipment needs to be heated. In this case, the first heat exchange system and the second heat exchange system can be adjusted to operate in heating mode.

[0120] Understandably, in order to ensure normal airflow and improve heat exchange efficiency during normal operation of the heat exchange system, it is also possible to check whether the second and third fans in the fresh air equipment are running before adjusting the operating modes of the first and second heat exchange systems. If the second and / or third fans are not running, the second and / or third fans can be started.

[0121] In practical applications, the operating mode of the first heat exchange system can be changed to heating mode by adjusting the first four-way valve in the first heat exchange system. For example: Figure 3 For example, by adjusting the state of the first four-way valve V1, the refrigerant circulation direction in the first heat exchange system is changed, so that the refrigerant circulation direction in the first heat exchange system becomes: first compressor C1 - first four-way valve V1 - second fresh air heat exchanger H3 - second throttling element K2 - first fresh air heat exchanger H2 - first throttling element K1 - outdoor heat exchanger H1 - first four-way valve V1 - first compressor C1, thereby enabling the first heat exchange system to operate in heating mode.

[0122] In practical use, the operating mode of the second heat exchange system can be changed to heating mode by adjusting the second four-way valve in the second heat exchange system. For example: Figure 3 For example, by adjusting the state of the second four-way valve V2, the refrigerant circulation direction in the second heat exchange system is changed, so that the refrigerant circulation direction in the second heat exchange system becomes: second compressor C2 - second four-way valve V2 - fourth fresh air heat exchanger H6 - fourth throttling element K4 - third fresh air heat exchanger H5 - third throttling element K3 - exhaust heat exchanger H4 - second four-way valve V2 - second compressor C2, thereby enabling the second heat exchange system to operate in heating mode.

[0123] Step S202”: Control the first fresh air heat exchanger, the second fresh air heat exchanger, the third fresh air heat exchanger and the fourth fresh air heat exchanger to operate as condensers so that the fresh air equipment is in a high-efficiency state.

[0124] It is understandable that the first and second fresh air heat exchangers in the first heat exchange system, as well as the third and fourth fresh air heat exchangers in the second heat exchange system, all operate as condensers to heat the fresh air. This can significantly increase the area of ​​the condenser that the fresh air contacts, improve the energy efficiency when heating the fresh air, and thus improve the energy efficiency of the fresh air equipment.

[0125] In practical implementation, the first throttling element in the first heat exchange system can be controlled to operate, thereby throttling and reducing pressure. The second throttling element can be controlled to stop operating or open the bypass, so that both the first and second fresh air heat exchangers can operate as condensers to heat the fresh air, increase the condenser area of ​​the second heat exchange system, reduce the condensing temperature, and increase the subcooling, thereby improving the energy efficiency of the first heat exchange system.

[0126] In practical implementation, the operation of the third throttling component in the second heat exchange system can be controlled to reduce pressure and stop the second throttling element from working or open the bypass, so that the third and fourth fresh air heat exchangers can both operate as condensers to heat the fresh air, increase the condenser area of ​​the second heat exchange system, reduce the condensing temperature, increase the subcooling temperature, and thus improve the energy efficiency of the second heat exchange system.

[0127] In practical use, in order to ensure the comfort of users of the fresh air equipment and improve the user experience, after step S202” in this embodiment, a third operating temperature parameter and a third target temperature parameter can also be obtained; the third operating temperature parameter and the third target temperature parameter are used to determine whether the heating capacity is too high, and the operating status of the fresh air equipment is adjusted according to the determination result.

[0128] It should be noted that the third operating temperature parameter can be any one or more of the following: indoor temperature, supply air temperature, or fresh air temperature. Specifically, indoor temperature can be the temperature in the room served by the fresh air system, supply air temperature can be the temperature of the air supplied by the fresh air system when it delivers air into the room, and fresh air temperature can be the temperature of the fresh air drawn in by the fresh air system.

[0129] In practical use, the third operating temperature parameter can be compared with the third target temperature parameter. Based on the comparison result, it can be determined whether the heating capacity is too high. For example, if the third operating temperature parameter is lower than the target temperature parameter, the result is that the heating capacity is too low; if the third operating temperature parameter is higher than the target temperature parameter, the result is that the heating capacity is too high. The target temperature parameter can be set by the user or preset by the administrator of the fresh air system. The target temperature parameter corresponds to the cooling mode, and this embodiment does not impose any restrictions on this.

[0130] Understandably, if the heating capacity is too high, the operating parameters of the fresh air system need to be adjusted to reduce its heating capacity; if the heating capacity is too low, the operating parameters need to be adjusted to increase its heating capacity, thereby ensuring that the indoor temperature meets the user's actual needs and improving user comfort.

[0131] In practice, if the heating capacity is too high, i.e. the third operating temperature parameter is greater than the third target temperature parameter, the heating capacity of the fresh air equipment needs to be reduced. Therefore, at least one of the following can be executed: reducing the speed of the compressor in the first or second heat exchange system, increasing the opening of the first throttling element in the first heat exchange system, increasing the opening of the second throttling element in the second heat exchange system, reducing the speed of the third fan in the fresh air equipment, or reducing the speed of the first fan in the first heat exchange system. Among these, the adjustment priority of the first heat exchange system is higher than that of the second heat exchange system.

[0132] In practice, if the heating capacity is too low, i.e. the third operating temperature parameter is less than or equal to the third target temperature parameter, the heating capacity of the fresh air equipment needs to be increased. Therefore, at least one of the following can be executed: increasing the speed of the compressor in the first or second heat exchange system, decreasing the opening of the first throttling element in the first heat exchange system, decreasing the opening of the second throttling element in the second heat exchange system, increasing the speed of the third fan in the fresh air equipment, or increasing the speed of the first fan in the first heat exchange system. Among these, the adjustment priority of the second heat exchange system is higher than that of the first heat exchange system.

[0133] In this embodiment, the range of the third target temperature parameter can be determined based on the third operating temperature parameter. For example, if the third temperature parameter is the indoor temperature, the range of the third target temperature parameter can be 12-32℃; if the third operating temperature parameter is the fresh air temperature, the range of the third target temperature parameter can be -30-25℃; if the third operating temperature parameter is the outlet air temperature, the range of the third target temperature parameter can be 15-60℃.

[0134] This embodiment adjusts the operating parameters of each component in the first and second heat exchange systems when the target operating mode is determined to be heating mode. This causes the fresh air heat exchangers in both systems to operate as condensers to heat the fresh air, thereby increasing the condenser area in the fresh air equipment and improving its operating energy efficiency in heating mode.

[0135] Furthermore, this embodiment of the invention also proposes a storage medium storing a fresh air equipment control program, which, when executed by a processor, implements the steps of the fresh air equipment control method described above.

[0136] Reference Figure 7 , Figure 7 This is a structural block diagram of the first embodiment of the fresh air equipment control device of the present invention.

[0137] like Figure 7 As shown, the fresh air equipment control device proposed in this embodiment of the invention includes:

[0138] The instruction receiving module 100 is used to obtain the target operating mode.

[0139] It should be noted that the mode setting command can be a command sent by the user to the core controller of the fresh air equipment when the user controls the fresh air equipment to change the operating mode via remote control or other means, or it can be a command automatically generated and sent to the core controller by the fresh air equipment when it determines that a mode change is needed based on the surrounding environmental information.

[0140] It is understandable that the mode setting command can include a mode identifier parameter. By parsing the mode setting command, the mode identifier parameter can be obtained, and the target operating mode can be determined based on the mode identifier parameter.

[0141] The parameter adjustment module 200 is used to adjust the operating status of the first heat exchange system and the second heat exchange system according to the target operating mode, so that the fresh air equipment is in a high-efficiency state.

[0142] It should be noted that, since the fresh air equipment involved in this embodiment has a first heat exchange system and a second heat exchange system compared with conventional fresh air equipment, in order to ensure that the fresh air equipment operates with high energy efficiency, it is necessary to select different control methods according to the target operating mode to adjust the operating parameters of the first heat exchange system and the second heat exchange system, modify the operating status of each component in the first heat exchange system and the second heat exchange system, thereby improving the energy efficiency and enabling the fresh air equipment to operate in a high energy efficiency state.

[0143] This embodiment of the fresh air system includes a first heat exchange system and a second heat exchange system. By receiving a mode setting command, the system determines the target operating mode based on the command and adjusts the operating parameters of the first and second heat exchange systems according to the target operating mode, thereby improving the energy efficiency of the fresh air system. Since multiple heat exchange systems are installed in the fresh air system, adjusting the combination of the operating modes of the first and second heat exchange systems according to the target operating mode can meet the outlet air temperature requirements for different seasons throughout the year. Furthermore, the operating states of the first and second heat exchange systems can be adjusted according to the target operating mode, keeping the fresh air system in a high-efficiency state. This allows the fresh air system to simultaneously meet heating and temperature control needs while ensuring high efficiency.

[0144] It should be understood that the above are merely illustrative examples and do not constitute any limitation on the technical solution of the present invention. In specific applications, those skilled in the art can make settings as needed, and the present invention does not impose any restrictions on this.

[0145] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of this invention. In practical applications, those skilled in the art can select some or all of the workflow to achieve the purpose of this embodiment according to actual needs, and no restrictions are imposed here.

[0146] In addition, for technical details not described in detail in this embodiment, please refer to the fresh air equipment control method provided in any embodiment of the present invention, which will not be repeated here.

[0147] Furthermore, 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.

[0148] 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.

[0149] 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 read-only memory (ROM) / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0150] 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 method for controlling a fresh air system, characterized in that, The fresh air equipment control method is applied to the fresh air equipment, which includes: a first heat exchange system and a second heat exchange system. The first heat exchange system is used to exchange heat between the fresh air duct and the outdoor environment, and the second heat exchange system is used to exchange heat between the fresh air duct and the exhaust duct. The first heat exchange system includes a first fresh air heat exchanger and a second fresh air heat exchanger disposed in the fresh air duct, and the second heat exchange system includes a third fresh air heat exchanger and a fourth fresh air heat exchanger disposed in the fresh air duct. The fresh air equipment also includes an outdoor heat exchanger installed in the outdoor environment, a first fan corresponding to the outdoor heat exchanger, a second fan installed in the fresh air duct, and a third fan installed in the exhaust duct; the first heat exchange system also includes a first compressor, a first four-way valve, a first throttling element, a second throttling element, and an outdoor heat exchanger, and the second heat exchange system also includes a second compressor, a second four-way valve, a third throttling element, a fourth throttling element, and an exhaust heat exchanger; The first throttling element is disposed between the outdoor heat exchanger and the first fresh air heat exchanger; The second throttling element is disposed between the first fresh air heat exchanger and the second fresh air heat exchanger; The third throttling element is disposed between the exhaust heat exchanger and the third fresh air heat exchanger; The fourth throttling element is disposed between the third fresh air heat exchanger and the fourth fresh air heat exchanger; The fresh air equipment control method includes the following steps: Obtain the target operating mode; When the target operating mode is heating mode, the operating modes of the first heat exchange system and the second heat exchange system are adjusted to heating mode; and The first fresh air heat exchanger, the second fresh air heat exchanger, the third fresh air heat exchanger, and the fourth fresh air heat exchanger are controlled to operate as condensers. Obtain the third operating temperature parameter and the third target temperature parameter; and When the third operating temperature parameter is less than the third target temperature parameter, at least one of the following is performed: increasing the speed of the first compressor, decreasing the opening of the first throttling element, increasing the speed of the first fan, increasing the speed of the third fan, increasing the speed of the second compressor, and decreasing the opening of the third throttling element, wherein the adjustment priority of the second heat exchange system is higher than that of the first heat exchange system. When the third operating temperature parameter is greater than the third target temperature parameter, at least one of the following is performed: reducing the speed of the first compressor, increasing the opening of the first throttling element, reducing the speed of the second fan, decreasing the speed of the second compressor, and increasing the opening of the third throttling element, wherein the adjustment priority of the first heat exchange system is higher than that of the second heat exchange system.

2. A fresh air equipment control device, characterized in that, The fresh air equipment includes: a first heat exchange system and a second heat exchange system. The first heat exchange system is used for heat exchange between the fresh air duct and the outdoor environment. The second heat exchange system is used for heat exchange between the fresh air duct and the exhaust duct. The first heat exchange system includes a first fresh air heat exchanger and a second fresh air heat exchanger installed in the fresh air duct. The second heat exchange system includes a third fresh air heat exchanger and a fourth fresh air heat exchanger installed in the fresh air duct. The fresh air equipment also includes an outdoor heat exchanger installed in the outdoor environment, a first fan corresponding to the outdoor heat exchanger, a second fan installed in the fresh air duct, and a third fan installed in the exhaust duct; the first heat exchange system also includes a first compressor, a first four-way valve, a first throttling element, a second throttling element, and an outdoor heat exchanger, and the second heat exchange system also includes a second compressor, a second four-way valve, a third throttling element, a fourth throttling element, and an exhaust heat exchanger; The first throttling element is disposed between the outdoor heat exchanger and the first fresh air heat exchanger; The second throttling element is disposed between the first fresh air heat exchanger and the second fresh air heat exchanger; The third throttling element is disposed between the exhaust heat exchanger and the third fresh air heat exchanger; The fourth throttling element is disposed between the third fresh air heat exchanger and the fourth fresh air heat exchanger; The fresh air equipment control device includes the following modules: The instruction receiving module is used to obtain the target operating mode; The parameter adjustment module is used to adjust the operating states of the first heat exchange system and the second heat exchange system according to the target operating mode, so that the fresh air equipment is in a high-efficiency state. Specifically, when the target operating mode is heating mode, the operating modes of the first heat exchange system and the second heat exchange system are adjusted to heating mode, and the first, second, third, and fourth fresh air heat exchangers are controlled to operate as condensers to ensure the fresh air equipment is in a high-efficiency state. The module also acquires a third operating temperature parameter and a third target temperature parameter. When the third operating temperature parameter is lower than the third target temperature parameter, the first compressor is increased. At least one of the following adjustments is made: increasing the rotational speed of the first heat exchange system, decreasing the opening of the first throttling element, increasing the rotational speed of the first fan, increasing the rotational speed of the third fan, increasing the rotational speed of the second compressor, and decreasing the opening of the third throttling element. The adjustment priority for the second heat exchange system is higher than that for the first heat exchange system. When the third operating temperature parameter is greater than the third target temperature parameter, at least one of the following adjustments is made: decreasing the rotational speed of the first compressor, increasing the opening of the first throttling element, decreasing the rotational speed of the second fan, decreasing the rotational speed of the second compressor, and increasing the opening of the third throttling element. The adjustment priority for the first heat exchange system is higher than that for the second heat exchange system.

3. A storage medium, characterized in that, The storage medium stores a fresh air equipment control program, which, when executed by a processor, implements the fresh air equipment control method as described in claim 1.

4. A fresh air device, characterized in that, The fresh air device includes: a first heat exchange system and a second heat exchange system, wherein the first heat exchange system is used for heat exchange between the fresh air duct and the outdoor environment, and the second heat exchange system is used for heat exchange between the fresh air duct and the exhaust duct; the fresh air device also includes: a memory, a processor, and a fresh air device control program stored in the memory and executable on the processor, wherein the fresh air device control program, when executed by the processor, implements the fresh air device control method as described in claim 1.

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