Operation control method and device of dual-system fresh air ventilator and dual-system fresh air ventilator

Abstract

The invention relates to the technical field of fresh air machines, in particular to an operation control method and device of a dual-system fresh air machine and the dual-system fresh air machine. When the fresh air machine is started in a heating mode, the operation state of a second heat pump system and the operation mode of an air supply fan are adjusted through the temperature of a first coil pipe of a first indoor heat exchanger; the problems that the heating capacity is insufficient in the initial heating stage, the air supply outlet blows out cold air, and heating of a user is affected are solved, the technical problem that in the prior art, when a double-system fresh air machine is started, the heating capacity is insufficient, and the cold air is blown out is solved, and the heating experience of the user is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fresh air fans, and particularly to an operation control method, device, and dual-system fresh air fan for a dual-system fresh air fan. Background Art

[0002] When the dual-system fresh air fan operates for heating in winter, due to the low temperature of the fresh air, and in the initial stage of heating, the heat exchanger on the indoor side fails to fully establish the system pressure difference, resulting in incomplete circulation of the refrigerant. At this time, the temperature of the indoor heat exchanger is not sufficient to heat the fresh air, and thus cold air is blown out from the air outlet, affecting the user experience.

[0003] The above content is only used to assist in understanding the technical solution of the present invention, and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] The main object of the present invention is to provide an operation control method, device, and dual-system fresh air fan for a dual-system fresh air fan, aiming to solve the technical problem that when the dual-system fresh air fan starts heating, the heating capacity is insufficient and cold air is blown out in the prior art.

[0005] To achieve the above object, the present invention provides an operation control method for a dual-system fresh air fan. The operation control method for the dual-system fresh air fan is applied to a dual-system fresh air fan, which includes a first heat pump system and a second heat pump system. The first heat pump system includes a first indoor heat exchanger, and the second heat pump system includes a second indoor heat exchanger. Both the first indoor heat exchanger and the second indoor heat exchanger are arranged in the air supply duct. The distance between the first indoor heat exchanger and the air outlet of the air supply duct is greater than the distance between the second indoor heat exchanger and the air outlet of the air supply duct, and a blower is provided at the air outlet.

[0006] The method includes the following steps:

[0007] When the fresh air fan starts heating, obtain the first coil temperature of the first indoor heat exchanger. When the fresh air fan starts heating, the first heat pump system starts heating operation; and

[0008] Determine the operating state of the second heat pump system and the operating state of the blower according to the first coil temperature.

[0009] Optionally, the determining the operating state of the second heat pump system and the rotational speed of the blower according to the first coil temperature includes:

[0010] When the first coil temperature is less than a preset first temperature threshold, control the second heat pump system to stop or remain stopped, and control the blower to stop or remain stopped.

[0011] Optionally, the fresh air mechanism starts heating, including:

[0012] The first heat pump system starts heating operation, and the second heat pump system and the air supply fan remain shut down.

[0013] Optionally, the operation control method of the dual-system fresh air machine further includes:

[0014] When the temperature of the first coil is greater than or equal to a preset first temperature threshold, control the air supply fan to operate at a first speed gear, and control the second heat pump system to start heating operation.

[0015] Optionally, the operation control method of the dual-system fresh air machine further includes:

[0016] When both the first heat pump system and the second heat pump system are in heating operation, obtain the first temperature of the first indoor heat exchanger, the second temperature of the second indoor heat exchanger, and the air supply temperature at the air supply outlet;

[0017] Determine the maximum coil temperature among the first temperature and the second temperature; and

[0018] Adjust the operation state of the air supply fan according to the maximum coil temperature and the air supply temperature.

[0019] Optionally, the second heat pump system further includes a third indoor heat exchanger disposed in the air supply duct, and the operation control method of the dual-system fresh air machine further includes:

[0020] When both the first heat pump system and the second heat pump system are in heating operation, obtain the first temperature of the first indoor heat exchanger, the second temperature of the second indoor heat exchanger, the third temperature of the third indoor heat exchanger, and the air supply temperature at the air supply outlet;

[0021] Determine the maximum coil temperature among the first temperature, the second temperature, and the third temperature; and

[0022] Adjust the operation state of the air supply fan according to the maximum coil temperature and the air supply temperature.

[0023] Optionally, adjusting the operation mode of the air supply fan according to the maximum coil temperature and the air supply temperature includes:

[0024] When the maximum coil temperature is less than a preset second temperature threshold and the air supply temperature is less than a preset first air supply temperature, the air supply fan stops operating;

[0025] When the maximum coil temperature is less than a preset second temperature threshold, the supply air temperature is less than a preset second supply air temperature, and not less than a preset first supply air temperature, the supply air fan operates at a first speed gear;

[0026] When the maximum coil temperature is less than a preset second temperature threshold and the supply air temperature is greater than a preset second supply air temperature, the supply air fan operates at a second speed gear;

[0027] When the maximum coil temperature is not less than a preset second temperature threshold, not greater than a preset third temperature threshold, and the supply air temperature is less than a preset first supply air temperature, the supply air fan operates at a first speed gear, and the preset second temperature threshold is less than the preset third temperature threshold;

[0028] When the maximum coil temperature is not less than a preset second temperature threshold, not greater than a preset third temperature threshold, and the supply air temperature is not less than a preset first supply air temperature, the supply air fan operates at a second speed gear; and

[0029] When the maximum coil temperature is greater than a preset third temperature threshold, the supply air fan operates at a second speed gear.

[0030] Optionally, the fan speed corresponding to the first speed gear is less than the fan speed corresponding to the second speed gear

[0031] In addition, to achieve the above object, the present invention also provides an operating control device for a dual-system fresh air fan, and the operating control device for the dual-system fresh air fan includes:

[0032] An acquisition module, configured to acquire a first coil temperature of the first indoor heat exchanger when the fresh air fan starts heating, wherein when the fresh air fan starts heating, the first heat pump system starts heating operation;

[0033] An adjustment module, configured to determine an operating state of the second heat pump system and an operating state of the supply air fan according to the first coil temperature.

[0034] In addition, to achieve the above object, the present invention also provides a dual-system fresh air fan, and the dual-system fresh air fan includes: a memory, a processor, and an operating control program for the dual-system fresh air fan stored on the memory and executable on the processor, and the operating control program for the dual-system fresh air fan is configured to implement the steps of the operating control method for the dual-system fresh air fan as described above.

[0035] In addition, to achieve the above object, the present invention also provides a storage medium, and an operating control program for a dual-system fresh air fan is stored on the storage medium, and when the operating control program for the dual-system fresh air fan is executed by a processor, the steps of the operating control method for the dual-system fresh air fan as described above are implemented.

[0036] The present invention discloses an operation control method for a dual-system fresh air blower. The operation control method for the dual-system fresh air blower is applied to a dual-system fresh air blower, which includes a first heat pump system and a second heat pump system. The first heat pump system includes a first indoor heat exchanger, and the second heat pump system includes a second indoor heat exchanger. Both the first indoor heat exchanger and the second indoor heat exchanger are arranged in the air supply duct. The distance between the first indoor heat exchanger and the air supply opening of the air supply duct is greater than the distance between the second indoor heat exchanger and the air supply opening of the air supply duct. A blower is provided at the air supply opening. The operation control method for the dual-system fresh air blower includes: when the fresh air blower starts heating, obtaining the first coil temperature of the first indoor heat exchanger, the second coil temperature of the second indoor heat exchanger, and the air supply temperature corresponding to the air supply opening; adjusting the operation mode of the blower according to the first coil temperature, the second coil temperature, and the air supply temperature. Compared with the prior art, when the fresh air blower starts heating, the present invention adjusts the operation state of the second heat pump system and the operation mode of the blower through the first coil temperature of the first indoor heat exchanger, avoiding insufficient heating capacity at the initial stage of heating and cold air being blown out from the air supply opening, which affects the user's heating. It avoids the technical problem that cold air will be blown out due to insufficient heating capacity when the dual-system fresh air blower starts heating in the prior art, and improves the user's heating experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a schematic structural diagram of a dual-system fresh air blower in the hardware operation environment related to the solution of the embodiment of the present invention;

[0038] Figure 2 is a schematic flowchart of the first embodiment of the operation control method for the dual-system fresh air blower of the present invention;

[0039] Figure 3 is a schematic structural diagram of an air conditioner in an embodiment of the control method for the fresh air blower of the present invention;

[0040] Figure 4 is another schematic structural diagram of an air conditioner in an embodiment of the control method for the fresh air blower of the present invention;

[0041] Figure 5 is a schematic flowchart of the second embodiment of the operation control method for the dual-system fresh air blower of the present invention;

[0042] Figure 6 is a schematic flowchart of the third embodiment of the operation control method for the dual-system fresh air blower of the present invention;

[0043] Figure 7 is a schematic block diagram of the first embodiment of the operation control device for the dual-system fresh air blower of the present invention.

[0044] Description of Reference Numerals

[0045]

[0046]

[0047] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0048] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0049] Reference Figure 1 , Figure 1 It is a schematic diagram of the dual-system fresh air fan structure of the hardware operating environment involved in the embodiment of the present invention.

[0050] like Figure 1 As shown, the dual-system fresh air blower 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. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a wireless fidelity (Wireless-Fidelity, Wi-Fi) interface). The memory 1005 may be a high-speed random access memory (Random Access Memory, RAM), or a stable non-volatile memory (Non-Volatile Memory, NVM), such as a disk storage. The memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0051] Those skilled in the art will understand that Figure 1 The structure shown in does not constitute a limitation on the dual-system fresh air fan, and may include more or fewer components than shown in the figure, or a combination of certain components, or a different arrangement of components.

[0052] like Figure 1 As shown, the memory 1005 as a storage medium may include an operating system, a network communication module, a user interface module, and an operation control program of a dual-system fresh air blower.

[0053] exist Figure 1In the shown dual-system fresh air fan, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 in the dual-system fresh air fan of the present invention can be arranged in the dual-system fresh air fan. The dual-system fresh air fan calls, through the processor 1001, the operation control program of the dual-system fresh air fan stored in the memory 1005, and executes the operation control method of the dual-system fresh air fan provided by the embodiments of the present invention.

[0054] The embodiments of the present invention provide an operation control method for a dual-system fresh air fan. Refer to Figure 2 , Figure 2 which is a schematic flowchart of the first embodiment of an operation control method for a dual-system fresh air fan of the present invention.

[0055] In this embodiment, the operation control method for the dual-system fresh air fan includes the following steps:

[0056] Step S10: When the fresh air fan starts heating, obtain the first coil temperature of the first indoor heat exchanger. Wherein, when the fresh air fan starts heating, the first heat pump system starts heating operation.

[0057] It should be noted that the execution subject of the method in this embodiment can be a device with data acquisition or data processing functions, such as: a control device of an environmental regulation device or a fresh air fan provided with a dual heat pump system, or other devices that can achieve the same or similar functions. This embodiment does not make specific limitations. In this embodiment and the following embodiments, a fresh air fan provided with a dual heat pump system will be used as an example for illustration.

[0058] It is worth noting that the fresh air fan with a dual heat pump system in this embodiment and the following embodiments refers to such as Figure 3 and Figure 4The shown fresh air fan, the fresh air fan 100 includes a housing and a first heat pump system 10. A air supply channel 4 is provided in the housing. The first heat pump system 10 includes: a fresh air heat exchanger structure and a first switching device. The fresh air heat exchanger structure is located in the air supply channel 4, and the fresh air heat exchanger structure has a refrigerant pipeline. The first switching device is communicated with the fresh air heat exchanger structure, and the first switching device is used to switch the flow direction of the refrigerant in the fresh air heat exchanger structure. In different operating modes of the first heat pump system 10, the refrigerant of the first heat pump system 10 first passes through the refrigerant pipeline located downstream of the air supply channel 4, and then passes through the refrigerant pipeline located upstream of the air supply channel 4. Wherein, the air supply channel 4 refers to the channel through which the fresh air fan 100 sends outdoor fresh air into the room, and the exhaust channel 5 refers to the channel through which the fresh air fan 100 discharges indoor air to the outside. The fresh air heat exchanger structure is arranged in the first refrigerant flow path. The first heat pump system 10 further includes: a first compressor 11, a first heat exchange module 12 and a reversing device 3. The first compressor 11 is arranged in the first refrigerant flow path and has a first exhaust port and a first suction port. The first heat exchange module 12 is arranged in the first refrigerant flow path and is communicated with the first switching device. The first heat exchange module 12 includes a first outdoor heat exchanger 35 and a heat recovery heat exchanger 36 connected in series. The heat recovery heat exchanger 36 is arranged in the exhaust channel 5, and the first outdoor heat exchanger 35 is arranged outside the housing (main housing). The first compressor 11 is installed in the exhaust channel 5 or outside the housing (main housing). Thus arranged, the heat recovery heat exchanger 36 is arranged in the exhaust channel 5. After the air in the exhaust channel 5 exchanges heat with the heat recovery heat exchanger 36, it is then discharged from the exhaust channel 5, so that the heat of the air discharged from the exhaust channel 5 can be recovered. The reversing device 3 communicates with the first exhaust port, the first suction port, the first heat exchange module 12 and the first switching device. The reversing device 3 is used to switch the refrigerant flow direction, so that the refrigerant first passes through the first heat exchange module 12 and then the first switching device, or so that the refrigerant first passes through the first switching device and then passes through the first heat exchange module 12. In order to realize the dehumidification and reheating function of the fresh air fan 100, the fresh air heat exchanger structure includes a first fresh air heat exchanger 13 and a second fresh air heat exchanger 14 connected in series in sequence. The first fresh air heat exchanger 13 is located downstream of the air supply channel 4 relative to the second fresh air heat exchanger 14. The outlet 34 is connected to the first fresh air heat exchanger 13, and the inlet 33 is connected to the second fresh air heat exchanger 14. Thus arranged, in the dehumidification and reheating mode, the first fresh air heat exchanger 13 acts as an evaporator to cool the air, and the second fresh air heat exchanger 14 acts as a condenser to heat the air, thereby realizing the dehumidification and reheating of the air.In order to reduce the control components in the fresh air fan 100 and improve the stability of the fresh air fan 100, the first switching device has a first communication port 31, a second communication port 32, a flow inlet 33 and a flow outlet 34. The fresh air heat exchanger structure communicates the flow outlet 34 and the flow inlet 33. The first switching device includes: a first one-way valve 18, a second one-way valve 19, a third one-way valve 1 and a fourth one-way valve 2. The first one-way valve 18 is connected between the first communication port 31 and the flow inlet 33, and the first one-way valve 18 is conductive in the direction from the flow inlet 33 to the first communication port 31; the second one-way valve 19 is connected between the first communication port 31 and the flow outlet 34, and the second one-way valve 19 is conductive in the direction from the first communication port 31 to the flow outlet 34; the third one-way valve 1 is connected between the flow inlet 33 and the second communication port 32, and the third one-way valve 1 is conductive in the direction from the flow inlet 33 to the second communication port 32; the fourth one-way valve 2 is connected between the flow outlet 34 and the second communication port 32, and the fourth one-way valve 2 is conductive in the direction from the second communication port 32 to the flow outlet 34. With such a setting, the first switching device is entirely composed of one-way valves. Compared with the solutions of a four-way valve or two three-way valves, no control components are required, and the fresh air fan 100 has relatively high stability.

[0059] With such a setting, for two heat pump systems, there are two indoor heat exchangers in the fresh air channel (exhaust air channel), and correspondingly two coil temperatures. In the heating mode, the coil temperature of the upstream heat exchanger is higher than that of the downstream heat exchanger. Compared with the solution of single-stage evaporation heating, the energy consumption is greatly increased. However, the upstream heat pump system can preheat or precool the air first, and then heat exchange through the downstream heat pump system. At this time, the outlet air temperature can be effectively increased in the heating mode.

[0060] The upstream heat exchanger in the above text refers to the heat exchanger closer to the fresh air inlet (or farther from the air supply outlet). In this embodiment and the following embodiments, it is referred to as the first indoor heat exchanger corresponding to the first heat pump system. The downstream heat exchanger refers to the heat exchanger farther from the fresh air inlet (or closer to the air supply outlet), and is also referred to as the second indoor heat exchanger corresponding to the second heat pump system. This embodiment does not make specific restrictions on this.

[0061] It should be noted that in winter, during the heating startup stage of the fresh air unit of the dual heat pump system, affected by the low-temperature fresh air outdoors, the high pressure of the heat pump system is established very slowly, and the refrigerant cannot establish a complete circuit in a short time. On the one hand, this will cause the coil temperature of the indoor heat exchanger to be relatively low, unable to exchange enough heat with the fresh air, resulting in cold air blowing; on the other hand, since the refrigerant is continuously output, but the pressure is not enough to make the refrigerant return to the compressor, the lubricating oil discharged from the compressor cannot return to the bottom of the compressor from the suction side in a short time, and the compressor will run without oil for a long time, easily burning out the compressor rotor and causing equipment damage.

[0062] To solve the above problems, in this embodiment, based on the first coil temperature of the first indoor heat exchanger, the second coil temperature of the second indoor heat exchanger, and the air supply temperature corresponding to the air supply outlet, the operation mode and operation speed of the air supply fan of the fresh air unit are adjusted, so as to avoid the situation of cold air blowing from the air supply fan when the heating capacity is insufficient.

[0063] In specific implementation, since the dual-system fresh air unit is affected by low temperature during the startup stage of the heating mode during low-temperature operation, the high pressure is established very slowly, making it difficult to establish a refrigerant circuit. At this time, only the first heat pump system can be controlled to operate in the heating mode, and the second heat pump system can be controlled to stop, or remain stopped. After operating for a period of time, when the coil temperature of the first heat pump system is greater than the preset first temperature threshold, the second heat pump system can be started to operate in heating mode to avoid the situation of equipment damage caused by the compressor running without oil.

[0064] Step S20: Determine the operating state of the second heat pump system and the operating state of the air supply fan according to the first coil temperature.

[0065] In this embodiment, according to the temperature range of the first coil temperature of the first indoor heat exchanger, the operating state of the second heat pump system and the speed of the air supply fan are controlled to avoid too low temperature or cold air blowing due to too large air volume.

[0066] In this embodiment, the operation mode of the air supply fan can be the gear set by the user, and different gears correspond to different speeds. For example: in this embodiment, the gears of the air supply fan are set to two modes: high gear and low gear. The fan speed corresponding to the high gear can be several times or more than the fan speed corresponding to the low gear. For example: more than three times. This embodiment does not make specific restrictions on this.

[0067] In specific implementation, since the fresh air unit is affected by low temperature during the startup stage of the heating mode during low-temperature operation, the high pressure is established very slowly, making it difficult to establish a refrigerant circuit. At this time, only the first heat pump system can be controlled to operate in the heating mode, and it is judged whether the second heat pump system needs to be started for heating according to the first coil temperature of the first heat pump system, so as to avoid equipment damage caused by the compressor running without oil.

[0068] In this embodiment, when the fresh air machine starts heating, the operating state of the second heat pump system and the operating mode of the air supply fan are adjusted according to the temperature of the first coil of the first indoor heat exchanger, so as to avoid insufficient heating capacity at the initial stage of heating, cold air being blown out from the air supply outlet, affecting the user's heating, and avoiding the technical problem that cold air will be blown out due to insufficient heating capacity when the double-system fresh air machine starts heating in the prior art, thus improving the user's heating experience.

[0069] Reference Figure 5 , Figure 5 is a schematic flow chart of the second embodiment of the operation control method of a double-system fresh air machine of the present invention.

[0070] Based on the above first embodiment, in this embodiment, the step S20 includes:

[0071] Step S201: When the temperature of the first coil is less than the preset first temperature threshold, the second heat pump system stops or remains stopped, and the air supply fan is controlled to stop or remain stopped.

[0072] It should be noted that since the first indoor heat exchanger is the upstream heat exchanger in the air supply duct, when fresh air enters the fresh air channel through the fresh air inlet, it will first exchange heat with the first indoor heat exchanger to increase the temperature of the fresh air. At this time, if the coil temperature of the first indoor heat exchanger is relatively low, it means that the refrigerant circuit of the heat pump system in the fresh air machine has not been fully established, and there is a possibility of blowing cold air at this time. Therefore, by controlling the fresh air machine to start preheating, the heat exchange between the fresh air and the first indoor heat exchanger is improved.

[0073] Furthermore, the control of the fresh air machine to start preheating includes:

[0074] Controlling the first heat pump system to operate and controlling the second heat pump system and the air supply fan to stop.

[0075] In specific implementation, in order to improve the preheating efficiency of the fresh air machine, this embodiment can only control the first heat pump system to start. At the same time, the second heat pump system and the air supply fan can also be controlled to stop or remain stopped, reducing the energy consumption of the fresh air machine while avoiding blowing cold air.

[0076] Furthermore, the first heat pump system starts heating operation, and the second heat pump system and the air supply fan remain stopped.

[0077] Furthermore, the operation control method of the double-system fresh air machine further includes:

[0078] When the temperature of the first coil is greater than or equal to the preset first temperature threshold, controlling the air supply fan to operate at the first speed gear and controlling the second heat pump system to start heating operation.

[0079] It should be understood that if the temperature of the first coil corresponding to the first indoor heat exchanger near the fresh air inlet in the air supply duct is greater than or equal to the preset first temperature threshold, it means that the heating capacity of the fresh air fan at this time raises the fresh air to a more appropriate range and will not affect the user's heating. At this time, the first heat pump system and the second heat pump system can be controlled to operate simultaneously. Further, since it is the initial stage of the heating phase, a large volume of air supply may still cause cold air supply. In this embodiment, the air supply fan is controlled to operate at the first speed gear, that is, by controlling the air supply fan to operate at a low gear, the possibility of cold air supply is reduced.

[0080] In this embodiment, by comparing the magnitude relationship between the temperature of the first coil of the first indoor heat exchanger and the preset first temperature threshold, the operation of the air supply fan, the first heat pump system, and the second heat pump system is further controlled to avoid the possibility of blowing cold air at the air supply level.

[0081] Reference Figure 6 , Figure 6 is a schematic flowchart of the third embodiment of the operation control method of a dual-system fresh air fan according to the present invention.

[0082] Based on the above second embodiment, in this embodiment, the step S20 includes:

[0083] Step S30: When both the first heat pump system and the second heat pump system are operating in heating mode, obtain the first temperature of the first indoor heat exchanger, the second temperature of the second indoor heat exchanger, and the air supply temperature at the air supply outlet.

[0084] It can be understood that the air supply temperature at the air supply outlet can be measured by a temperature sensor or a temperature sensing package installed at the air supply outlet, or by other devices that can achieve the same or similar functions. This embodiment does not make specific limitations on this.

[0085] Both the first indoor heat exchanger and the second indoor heat exchanger are arranged in the air supply duct, and the distance between the first indoor heat exchanger and the air supply outlet of the air supply duct is greater than the distance between the second indoor heat exchanger and the air supply outlet of the air supply duct.

[0086] Step S40: Determine the maximum coil temperature between the first coil temperature and the second coil temperature.

[0087] It should be noted that affected by the low-temperature environment, the refrigerant circuit in the fresh air fan is established slowly. In this embodiment, when controlling the air supply volume, the rotation speed of the air supply fan can be controlled according to the coil temperatures of each indoor heat exchanger in the fresh air fan. In this process, due to the inevitability of heat exchange, generally the maximum value among the coil temperatures is selected to determine the rotation speed of the air supply fan to improve the comfort of the air supply.

[0088] Step S50: Adjust the operation mode of the air supply fan according to the maximum coil temperature and the air supply temperature.

[0089] It can be understood that the operation mode of the air supply fan refers to whether the air supply fan operates, the operation gear, etc. In this embodiment, the high gear and the low gear are taken as examples for illustration.

[0090] In addition, when adjusting the operation mode of the air supply fan according to the maximum coil temperature and the air supply temperature, the operation control method of the dual-system fresh air fan further includes:

[0091] When both the first heat pump system and the second heat pump system are operating in heating mode, obtain the first temperature of the first indoor heat exchanger, the second temperature of the second indoor heat exchanger, the third temperature of the third indoor heat exchanger, and the air supply temperature at the air supply outlet;

[0092] Determine the maximum coil temperature among the first temperature, the second temperature, and the third temperature; and

[0093] Adjust the operation state of the air supply fan according to the maximum coil temperature and the air supply temperature.

[0094] It can be understood that the third indoor heat exchanger refers to the indoor heat exchanger in the upstream part of the air supply duct in the second heat pump system, that is, the distance between the third indoor heat exchanger and the fresh air inlet of the air supply duct is greater than the distance between a part of the first indoor heat exchanger of the first heat pump system and the fresh air inlet of the air supply duct. Refer to the fresh air fan structure diagram in Figure 3 Or Figure 4 In Figure 3 When there are multiple indoor heat exchangers in both heat pump systems of the fresh air equipment, it is possible that the distance between a part of the indoor heat exchangers of the first heat pump system and the fresh air inlet of the air supply duct is less than the distance between the second indoor heat exchanger of the second heat pump system and the fresh air inlet of the air supply duct. It is also possible that the first fresh air heat exchanger 13 (the third indoor heat exchanger) is in the upstream of the air supply duct as shown in

[0095] Further, the adjustment of the operation mode of the air supply fan according to the maximum coil temperature and the air supply temperature includes:

[0096] When the maximum coil temperature is less than the preset second temperature threshold and the air supply temperature is less than the preset first air supply temperature, the air supply fan stops operating;

[0097] When the maximum coil temperature is less than a preset second temperature threshold, the supply air temperature is less than a preset second supply air temperature, and not less than a preset first supply air temperature, the supply air fan operates at a first speed gear;

[0098] When the maximum coil temperature is less than a preset second temperature threshold and the supply air temperature is greater than the preset second supply air temperature, the supply air fan operates at a second speed gear;

[0099] When the maximum coil temperature is not less than a preset second temperature threshold, not greater than a preset third temperature threshold, and the supply air temperature is less than a preset first supply air temperature, the supply air fan operates at a first speed gear, and the preset second temperature threshold is less than the preset third temperature threshold;

[0100] When the maximum coil temperature is not less than a preset second temperature threshold, not greater than a preset third temperature threshold, and the supply air temperature is not less than a preset first supply air temperature, the supply air fan operates at a second speed gear;

[0101] When the maximum coil temperature is greater than a preset third temperature threshold, the supply air fan operates at a second speed gear.

[0102] It can be understood that the fan speed corresponding to the first speed gear is less than the fan speed corresponding to the second speed gear, and the fan speed corresponding to the second speed gear can be more than three times the fan speed corresponding to the first speed gear.

[0103] In a specific implementation, taking the preset second temperature threshold as 40 °C, the preset third temperature threshold as 60 °C as an example, the fan speed corresponding to the low gear is 2000 revolutions / s, the fan speed corresponding to the high gear is 6000 revolutions / s as an example, the preset first supply air temperature is 20 °C, and the preset second supply air temperature is 25 °C for illustration. When the maximum coil temperature T2 is less than 40 °C and the supply air temperature is less than 20 °C, the supply air fan stops running; when the maximum coil temperature T2 is less than 40 °C and the supply air temperature is in the range of [20 °C, 25 °C], the supply air fan operates at 2000 revolutions / s; when the maximum coil temperature T2 is less than 40 °C and the supply air temperature is greater than 25 °C, the supply air fan operates at 6000 revolutions / s; when the maximum coil temperature T2 is in the range of [40 °C, 60 °C] and the supply air temperature is less than 20 °C, the supply air fan operates at 2000 revolutions / s; when the maximum coil temperature T2 is in the range of [40 °C, 60 °C] and the supply air temperature is greater than or equal to 20 °C, the supply air fan operates at 6000 revolutions / s; when the maximum coil temperature T2 is greater than 60 °C, the supply air fan operates at 6000 revolutions / s.

[0104] In this embodiment, when both the first heat pump system and the second heat pump system are operating in the heating mode, the maximum coil temperature between the first coil temperature and the second coil temperature is determined; or the maximum coil temperature among the first temperature, the second temperature, and the third temperature is determined. By adjusting the operating mode of the air supply fan according to the maximum coil temperature and the air supply temperature, the comfort of the air supply can be improved.

[0105] In addition, an embodiment of the present invention further provides a storage medium, on which a running control program for a dual-system fresh air fan is stored. When the running control program for the dual-system fresh air fan is executed by a processor, the steps of the running control method for the dual-system fresh air fan as described above are implemented.

[0106] Since this storage medium adopts all the technical solutions of the above-mentioned all embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be elaborated here one by one.

[0107] Refer to Figure 7 , Figure 7 which is a structural block diagram of the first embodiment of the running control device for the dual-system fresh air fan of the present invention.

[0108] As Figure 7 shown, the running control device for the dual-system fresh air fan proposed in the embodiment of the present invention includes:

[0109] An acquisition module 10, configured to acquire the first coil temperature of the first indoor heat exchanger when the fresh air fan starts heating. When the fresh air fan starts heating, the first heat pump system starts operating in the heating mode.

[0110] An adjustment module 20, configured to determine the operating state of the second heat pump system and the operating state of the air supply fan according to the first coil temperature.

[0111] In one embodiment, the adjustment module 20 is further configured to, when the first coil temperature is less than a preset first temperature threshold, control the second heat pump system to stop or remain stopped, and control the air supply fan to stop or remain stopped.

[0112] In one embodiment, the adjustment module 20 is further configured to, when the first heat pump system starts operating in the heating mode, keep the second heat pump system and the air supply fan stopped.

[0113] In one embodiment, the adjustment module 20 is further configured to, when the first coil temperature is greater than or equal to the preset first temperature threshold, control the air supply fan to operate at a first speed gear, and control the second heat pump system to start operating in the heating mode.

[0114] In one embodiment, the adjustment module 20 is further configured to, when both the first heat pump system and the second heat pump system are operating in heating mode, obtain the first temperature of the first indoor heat exchanger, the second temperature of the second indoor heat exchanger, and the air supply temperature at the air supply outlet;

[0115] determine the maximum coil temperature among the first temperature and the second temperature; and

[0116] adjust the operating state of the air supply fan according to the maximum coil temperature and the air supply temperature.

[0117] In one embodiment, the adjustment module 20 is further configured to, when both the first heat pump system and the second heat pump system are operating in heating mode, obtain the first temperature of the first indoor heat exchanger, the second temperature of the second indoor heat exchanger, the third temperature of the third indoor heat exchanger, and the air supply temperature at the air supply outlet;

[0118] determine the maximum coil temperature among the first temperature, the second temperature, and the third temperature; and

[0119] adjust the operating state of the air supply fan according to the maximum coil temperature and the air supply temperature.

[0120] In one embodiment, the adjustment module 20 is further configured to, when the maximum coil temperature is less than a preset second temperature threshold and the air supply temperature is less than a preset first air supply temperature, stop the operation of the air supply fan; when the maximum coil temperature is less than the preset second temperature threshold, the air supply temperature is less than a preset second air supply temperature and not less than the preset first air supply temperature, the air supply fan operates at a first speed gear; when the maximum coil temperature is less than the preset second temperature threshold and the air supply temperature is greater than the preset second air supply temperature, the air supply fan operates at a second speed gear; when the maximum coil temperature is not less than the preset second temperature threshold, not greater than the preset third temperature threshold, and the air supply temperature is less than the preset first air supply temperature, the air supply fan operates at the first speed gear, and the preset second temperature threshold is less than the preset third temperature threshold; when the maximum coil temperature is not less than the preset second temperature threshold, not greater than the preset third temperature threshold, and the air supply temperature is not less than the preset first air supply temperature, the air supply fan operates at the second speed gear; when the maximum coil temperature is greater than the preset third temperature threshold, the air supply fan operates at the second speed gear.

[0121] In one embodiment, the adjustment module 20 is further configured that the fan speed corresponding to the first speed gear is less than the fan speed corresponding to the second speed gear.

[0122] In this embodiment, when the fresh air mechanism starts heating, the operating state of the second heat pump system and the operating mode of the air supply fan are adjusted according to the temperature of the first coil of the first indoor heat exchanger, so as to avoid insufficient heating capacity at the initial stage of heating, cold air being blown out from the air supply outlet, which affects the user's heating, and solves the technical problem in the prior art that cold air will be blown out due to insufficient heating capacity when the dual-system fresh air mechanism starts heating, thus improving the user's heating experience.

[0123] It should be understood that although the steps in the flowcharts in the embodiments of the present application are sequentially shown according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless there is a clear description in this article, the execution of these steps has no strict order limit, and they can be executed in other orders. Moreover, at least some of the steps in the figure may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same moment, but can be executed at different moments, and their execution order is not necessarily sequential, but can be executed alternately or in turn with at least a part of other steps or sub-steps or stages of other steps.

[0124] It should be understood that the above is only an example for illustration and does not constitute any limitation to the technical solution of the present invention. In specific applications, those skilled in the art can set according to needs, and the present invention does not limit this.

[0125] It should be noted that the above-described work process is only illustrative and does not limit the protection scope of the present invention. In actual applications, those skilled in the art can select some or all of them according to actual needs to achieve the purpose of the solution of this embodiment, and no limitation is made here.

[0126] In addition, for the technical details not described in detail in this embodiment, reference can be made to the operation control method of the dual-system fresh air machine provided in any embodiment of the present invention, which will not be elaborated here.

[0127] In addition, it should be noted that in this article, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or system. Without further limitation, an element defined by the phrase "including a..." does not exclude the existence of another identical element in the process, method, article or system including that element.

[0128] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0129] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-described example methods can be implemented by means of software plus a necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation. Based on such an understanding, the technical solution of the present invention, in essence, 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 for causing a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in various embodiments of the present invention.

[0130] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. An operation control method for a dual - system fresh air fan, characterized in that, the operation control method of the dual - system fresh air fan is applied to a dual - system fresh air fan, the dual - system fresh air fan includes a first heat pump system and a second heat pump system, the first heat pump system includes a first indoor heat exchanger, the second heat pump system includes a second indoor heat exchanger, both the first indoor heat exchanger and the second indoor heat exchanger are arranged in the air supply duct, the distance between the first indoor heat exchanger and the air supply outlet of the air supply duct is greater than the distance between the second indoor heat exchanger and the air supply outlet of the air supply duct, and an air supply fan is provided at the air outlet; the operation control method of the dual - system fresh air fan includes: when the fresh air fan starts heating, obtaining the first coil temperature of the first indoor heat exchanger, wherein when the fresh air fan starts heating, the first heat pump system starts heating operation; and determining the operation state of the second heat pump system and the operation state of the air supply fan according to the first coil temperature.

2. The operation control method of the dual - system fresh air fan according to claim 1, characterized in that, the determining the operation state of the second heat pump system and the rotation speed of the air supply fan according to the first coil temperature includes: when the first coil temperature is less than a preset first temperature threshold, controlling the second heat pump system to stop or remain stopped, and controlling the air supply fan to stop or remain stopped.

3. The operation control method of the dual - system fresh air fan according to claim 2, characterized in that, the fresh air fan starting heating includes: the first heat pump system starts heating operation, and the second heat pump system and the air supply fan remain stopped.

4. The operation control method of the dual - system fresh air fan according to claim 2, characterized in that, the operation control method of the dual - system fresh air fan further includes: when the first coil temperature is greater than or equal to the preset first temperature threshold, controlling the air supply fan to operate at the first speed gear, and controlling the second heat pump system to start heating operation.

5. The operation control method of the dual - system fresh air fan according to claim 1, characterized in that, the operation control method of the dual - system fresh air fan further includes: when both the first heat pump system and the second heat pump system are in heating operation, obtaining the first temperature of the first indoor heat exchanger, the second temperature of the second indoor heat exchanger, and the air supply temperature at the air supply outlet; determining the maximum coil temperature among the first temperature and the second temperature; and adjusting the operation state of the air supply fan according to the maximum coil temperature and the air supply temperature.

6. The operation control method of the dual - system fresh air fan according to claim 1, characterized in that, the second heat pump system further includes a third indoor heat exchanger arranged in the air supply duct, and the operation control method of the dual - system fresh air fan further includes: when both the first heat pump system and the second heat pump system are in heating operation, obtaining the first temperature of the first indoor heat exchanger, the second temperature of the second indoor heat exchanger, the third temperature of the third indoor heat exchanger, and the air supply temperature at the air supply outlet; Determine the maximum coil temperature among the first temperature, the second temperature, and the third temperature; and Adjust the operating state of the supply air fan according to the maximum coil temperature and the supply air temperature.

7. The operating control method of the dual-system fresh air fan according to claim 5 or 6, characterized in that The adjusting the operating mode of the supply air fan according to the maximum coil temperature and the supply air temperature includes: When the maximum coil temperature is less than a preset second temperature threshold and the supply air temperature is less than a preset first supply air temperature, the supply air fan stops operating; When the maximum coil temperature is less than a preset second temperature threshold and the supply air temperature is less than a preset second supply air temperature and not less than a preset first supply air temperature, the supply air fan operates at a first speed gear; When the maximum coil temperature is less than a preset second temperature threshold and the supply air temperature is greater than a preset second supply air temperature, the supply air fan operates at a second speed gear; When the maximum coil temperature is not less than a preset second temperature threshold and not greater than a preset third temperature threshold and the supply air temperature is less than a preset first supply air temperature, the supply air fan operates at a first speed gear, and the preset second temperature threshold is less than the preset third temperature threshold; When the maximum coil temperature is not less than a preset second temperature threshold and not greater than a preset third temperature threshold and the supply air temperature is not less than a preset first supply air temperature, the supply air fan operates at a second speed gear; and When the maximum coil temperature is greater than a preset third temperature threshold, the supply air fan operates at a second speed gear.

8. The operating control method of the dual-system fresh air fan according to claim 7, characterized in that The fan speed corresponding to the first speed gear is less than the fan speed corresponding to the second speed gear.

9. An operating control device for a dual-system fresh air fan, characterized in that The operating control device for the dual-system fresh air fan includes: An acquisition module, configured to acquire the first coil temperature of the first indoor heat exchanger when the fresh air fan starts heating, wherein when the fresh air fan starts heating, the first heat pump system starts heating operation; and An adjustment module, configured to determine the operating state of the second heat pump system and the operating state of the supply air fan according to the first coil temperature.

10. A dual-system fresh air fan, characterized in that The dual-system fresh air fan includes: a memory, a processor, and an operating control program for the dual-system fresh air fan stored on the memory and executable on the processor, and the operating control program for the dual-system fresh air fan is configured to implement the operating control method of the dual-system fresh air fan according to any one of claims 1 to 8.

11. A storage medium, characterized in that An operating control program for a dual-system fresh air fan is stored on the storage medium, and when the operating control program for the dual-system fresh air fan is executed by a processor, it implements the operating control method of the dual-system fresh air fan according to any one of claims 1 to 8.

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