Air conditioning system fan control method, device, air conditioning system and air conditioning equipment

Abstract

The present application relates to a method and device for controlling a fan of an air-conditioning system, an air-conditioning system and air-conditioning equipment, including: determining the operating mode of the air-conditioning system; if the operating mode of the air-conditioning system is the normal mode, controlling the first fan and the second fan to start, and controlling the partition to close; if the operating mode of the air-conditioning system is the first defrost mode, controlling the first fan to close, the second fan to start, and controlling the partition to open; if the operating mode of the air-conditioning system is the second defrost mode, controlling the first fan to open, the second fan to close, and controlling the partition to open. The present application flexibly controls the operation of the fan during the defrosting process of the air-conditioning system, so that the wind field distribution is more uniform during the zone heat exchange, effectively reducing the defrosting frequency of the unit and extending the frosting cycle.

Description

Technical Field

[0001] The present application relates to the technical field of air-conditioning systems, and in particular to a method and device for controlling a fan of an air-conditioning system, an air-conditioning system, and air-conditioning equipment. Background Art

[0002] During daily use of air-conditioning equipment, the unit will form a frost layer due to operation in a low temperature environment. When the frost layer reaches a certain thickness, the air-conditioning system starts to execute the defrost procedure. When executing the defrost procedure, the traditional air-conditioning system will control the system from heating mode to cooling mode and stop the fan, which will cause the indoor temperature to drop and reduce comfort.

[0003] At the same time, frequent activation of the defrost program in the air-conditioning system will lead to defects such as frequent activation of the compressor and slow startup of the compressor after defrosting, reducing the user experience of the heat pump air-conditioning product. Summary of the invention

[0004] Based on this, it is necessary to provide a fan control method, device, air-conditioning system and air-conditioning equipment that can improve the defrosting effect of the heat exchanger while ensuring indoor comfort and system operation stability in response to the above technical problems.

[0005] In a first aspect, the present application provides a fan control method for an air conditioning system, wherein a heat exchanger of the air conditioning system is divided into a first partition and a second partition, wherein the first partition is provided with a first fan, and the second partition is provided with a second fan, and a partition is provided between the first fan and the second fan, and when the partition is closed, it is used to block the wind field between the first partition and the second partition, and when the partition is opened, it is used to conduct the wind field between the first partition and the second partition, comprising:

[0006] Determine an air conditioning system operation mode, wherein the air conditioning system operation mode includes a normal mode, a first defrost mode, and a second defrost mode; the heat exchanger further includes a supercooling section, and when the real-time temperature of the supercooling section is less than or equal to a defrost start threshold temperature, determine that the air conditioning system operation mode enters the first defrost mode;

[0007] If the operation mode of the air conditioning system is the normal mode, the first partition and the second partition are both in the heat exchange state, the first fan and the second fan are controlled to start, and the partition is controlled to close;

[0008] If the operation mode of the air conditioning system is the first defrosting mode, the first partition is in the defrosting state, the second partition is in the heat exchange state, the first fan is controlled to be turned off, the second fan is started, and the partition is controlled to be opened;

[0009] If the air conditioning system operation mode is the second defrost mode, the first partition is in a heat exchange state, the second partition is in a defrost state, the first fan is controlled to be turned on, the second fan is controlled to be turned off, and the partition is controlled to be opened.

[0010] In one embodiment, the heat exchanger further includes a subcooling section, the subcooling section includes a first temperature sensor, the first partition includes a second temperature sensor, the second partition includes a third temperature sensor, and determining the operating mode of the air conditioning system includes:

[0011] Acquire a first temperature detected by the first temperature sensor, a second temperature detected by the second temperature sensor, and a third temperature detected by the third temperature sensor;

[0012] The air conditioning system operating mode is determined according to the first temperature, the second temperature, and the third temperature.

[0013] In one embodiment, determining the air conditioning system operation mode according to the first temperature, the second temperature and the third temperature includes:

[0014] If the first temperature is greater than the defrost start threshold temperature, determining that the air conditioning system operation mode is a normal mode;

[0015] If the first temperature is less than or equal to the defrost start threshold temperature, determining that the air-conditioning system operation mode is a first defrost mode;

[0016] If the second temperature is greater than or equal to the defrost exit threshold temperature, determining that the air-conditioning system operation mode is the second defrost mode;

[0017] If the third temperature is greater than or equal to the defrost exit threshold temperature, it is determined that the operation mode of the air-conditioning system is the normal mode.

[0018] In one embodiment, if the operating mode of the air conditioning system is the first defrost mode, the method further includes:

[0019] If the first temperature is less than or equal to the defrost start threshold temperature, and the temperature difference between the first temperature and the defrost start threshold temperature is less than a preset temperature difference threshold, controlling the second fan to operate at the first gear;

[0020] If the first temperature is less than or equal to the defrost start threshold temperature, and the temperature difference between the first temperature and the defrost start threshold temperature is greater than or equal to a preset temperature difference threshold, the second fan is controlled to operate at a second gear, wherein the second gear is lower than the first gear.

[0021] In one embodiment, if the operating mode of the air conditioning system is the second defrost mode, the method further includes:

[0022] If the second temperature is greater than or equal to the defrost exit threshold temperature, and the temperature difference between the second temperature and the defrost exit threshold temperature is less than a preset temperature difference threshold, controlling the first fan to operate at the third gear;

[0023] If the second temperature is greater than or equal to the defrost exit threshold temperature, and the temperature difference between the second temperature and the defrost exit threshold temperature is greater than or equal to the preset temperature difference threshold, the first fan is controlled to operate at the fourth gear, wherein the fourth gear is smaller than the third gear.

[0024] In one embodiment, when the air conditioning system is in a heating state, the method further includes:

[0025] If the operation mode of the air-conditioning system is the first defrosting mode, the first partition is in the defrosting state, and the second partition is in the heat exchange state, the compressor of the air-conditioning system is controlled to operate, and the valve body assembly on the path from the subcooling section to the first partition is controlled to open, so that the compressor outputs high-temperature and high-pressure steam to the first partition;

[0026] If the air-conditioning system operating mode is the second defrost mode, the first partition is in a heat exchange state, and the second partition is in a defrost state, the compressor of the air-conditioning system is controlled to operate, and the valve body assembly on the path from the subcooling section to the second partition is controlled to open, so that the compressor outputs high-temperature and high-pressure steam to the second partition.

[0027] In a second aspect, the present application further provides a fan control device for an air conditioning system, wherein a heat exchanger of the air conditioning system is divided into a first partition and a second partition, wherein the first partition is provided with a first fan, and the second partition is provided with a second fan, and a partition is provided between the first fan and the second fan, and when the partition is closed, it is used to block the wind field between the first partition and the second partition, and when the partition is opened, it is used to conduct the wind field between the first partition and the second partition, including:

[0028] A determination module is used to determine an operation mode of the air conditioning system, wherein the operation mode of the air conditioning system includes a normal mode, a first defrost mode, and a second defrost mode; the heat exchanger further includes a supercooling section, and when the real-time temperature of the supercooling section is less than or equal to the defrost start threshold temperature, it is determined that the operation mode of the air conditioning system enters the first defrost mode;

[0029] A first execution module is used for controlling the first fan and the second fan to start and the partition to close if the operation mode of the air conditioning system is a normal mode and the first partition and the second partition are both in a heat exchange state;

[0030] A second execution module is used for controlling the first fan to be turned off, the second fan to be turned on, and the partition to be opened if the operation mode of the air-conditioning system is the first defrosting mode, the first partition is in the defrosting state, and the second partition is in the heat exchange state;

[0031] The third execution module is used to control the first fan to turn on, the second fan to turn off, and the partition to open if the operating mode of the air-conditioning system is the second defrost mode, the first partition is in a heat exchange state, and the second partition is in a defrost state.

[0032] In a third aspect, the present application also provides an air conditioning system, comprising: a controller and a heat exchanger;

[0033] The heat exchanger is divided into a first partition and a second partition, wherein the first partition is provided with a first fan, the second partition is provided with a second fan, a partition is provided between the first fan and the second fan, and the partition is used to block the wind field between the first partition and the second partition when the partition is closed, and is used to conduct the wind field between the first partition and the second partition when the partition is opened;

[0034] The controller is respectively connected to the heat exchanger, the first fan and the second fan;

[0035] The controller is used to execute the steps of the air conditioning system fan control method described in the first aspect.

[0036] In a fourth aspect, the present application also provides an air-conditioning device, including the air-conditioning system described in the third aspect.

[0037] In a fifth aspect, the present application further provides a computer device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the air conditioning system fan control method described in the first aspect when executing the computer program.

[0038] In a sixth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of the air-conditioning system fan control method described in the first aspect are implemented.

[0039] In a seventh aspect, the present application further provides a computer program product, wherein the computer program product comprises a computer program, and when the computer program is executed by a processor, the steps of the air conditioning system fan control method described in the first aspect are implemented.

[0040] In summary, the present application proposes a method, device, air conditioning system and air conditioning equipment for controlling the fan of an air conditioning system, including: determining the operating mode of the air conditioning system; if the operating mode of the air conditioning system is the normal mode, controlling the first fan and the second fan to start, and controlling the partition to close; if the operating mode of the air conditioning system is the first defrost mode, controlling the first fan to close, the second fan to start, and controlling the partition to open; if the operating mode of the air conditioning system is the second defrost mode, controlling the first fan to open, the second fan to close, and controlling the partition to open. The present application flexibly controls the operation of the fan during the defrosting process of the air conditioning system, so that the wind field distribution is more uniform during zone heat exchange, effectively reducing the defrosting frequency of the unit and extending the frosting cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 is a schematic structural diagram of an air conditioning system in one embodiment;

[0042] Figure 2 is a schematic structural diagram of a heat exchanger in an air conditioning system in one embodiment;

[0043] Figure 3 A schematic diagram of a flow chart of a fan control method for an air conditioning system in one embodiment;

[0044] Figure 4 A schematic diagram of a process flow for determining an operating mode of an air conditioning system in one embodiment;

[0045] Figure 5 A schematic flow chart of steps for determining an operating mode of an air conditioning system in another embodiment;

[0046] Figure 6 A schematic diagram of a process flow of controlling the operation of a fan in a first defrosting mode in an embodiment;

[0047] Figure 7 A schematic diagram of a flow chart of steps for controlling the operation of a fan in a second defrosting mode in an embodiment;

[0048] Figure 8 A schematic diagram of a process flow of controlling the real-time status of the first partition and the second partition in a defrost mode in an embodiment;

[0049] Fig. 9 is a structural block diagram of a fan control device for an air conditioning system in one embodiment;

[0050] Fig.10 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0052] The fan control method of the air conditioning system provided in the embodiment of the present application can be applied to Figure 1 In the air-conditioning system shown, specifically, the air-conditioning system provided in this embodiment includes a controller, a compressor, a four-way valve, an evaporator, a left fan 1 and a right fan 2 arranged on both sides of the evaporator, a condenser, an upper fan 1 arranged in the upper half of the condenser, a lower fan 2 arranged in the lower half of the condenser, a partition arranged between the upper fan 1 and the lower fan 2, and a throttle valve.

[0053] In this embodiment, a heat exchanger is a device that transfers part of the heat of a hot fluid to a cold fluid, and is also called a heat exchanger. Both an evaporator and a condenser are heat exchangers.

[0054] The controller is connected to the compressor, four-way valve, evaporator, left fan 1, right fan 2, condenser, upper fan 1, lower fan 2, partition and throttle valve respectively. The controller is used to control each component according to the control mode set in the air-conditioning system, so that each component can be combined to realize various functions of the air-conditioning. The functions that can be realized by the air-conditioning system include but are not limited to heating, cooling, dehumidification and air supply.

[0055] In this embodiment, the heat exchanger of the air-conditioning system is divided into a first partition and a second partition, wherein the first partition is provided with a first fan, the second partition is provided with a second fan, and a partition is provided between the first fan and the second fan. When the partition is closed, it is used to block the wind field between the first partition and the second partition, and when the partition is opened, it is used to conduct the wind field between the first partition and the second partition.

[0056] In actual application, the air conditioning system includes an indoor unit and an outdoor unit, and both the indoor unit and the outdoor unit include corresponding heat exchangers. For example, the outdoor unit includes a condenser, and the indoor unit includes an evaporator.

[0057] like Figure 2 As shown, taking the heat exchanger of the outdoor unit as an example, the heat exchanger of the outdoor unit is divided into an upper half zone, a lower half zone and a supercooling section. Among them, the upper half zone is the first zone in this embodiment, and the lower half zone is the second zone in this embodiment. Figure 1 As shown, the upper fan 1 of the condenser is the first fan, and the lower fan 2 is the second fan. The heat exchanger also includes on-off valve 1, on-off valve 2, on-off valve 3, on-off valve 4, throttle valve 1, throttle valve 2, throttle valve 3, a first temperature sensor R1, a second temperature sensor R3, and a third temperature sensor R2.

[0058] In this embodiment, the throttle valve may be an electronic expansion valve, or may be replaced by a one-way throttling device. The specific type of the throttle valve may be configured according to the needs of the actual application scenario.

[0059] In actual application, when the indoor unit of the air-conditioning system operates in a high humidity environment and operates in a cooling mode, the heat exchanger of the indoor unit may be frosted. The specific structure of the heat exchanger provided in this embodiment can be applied to the heat exchanger of the indoor unit to achieve defrosting of the heat exchanger of the indoor unit. When the outdoor unit of the air-conditioning system operates in a low temperature or ultra-low temperature environment and operates in a heating mode, the heat exchanger of the outdoor unit may be frosted. The specific structure of the heat exchanger in this embodiment can also be applied to the heat exchanger of the outdoor unit to achieve defrosting of the heat exchanger of the outdoor unit.

[0060] It should be noted that, whether the heat exchanger is used in the indoor unit or the outdoor unit, the heat exchanger will be divided into a first partition and a second partition, and separate fans are set in the corresponding partitions, and switchable partitions are set between the fans. This embodiment can maximize the function of the heat exchanger and reduce the fluctuation of the indoor ambient temperature by flexibly controlling the dual fans and partitions in conjunction with the defrost mode, thereby ensuring the operating effect of the air-conditioning system and delaying the operating cycle of the defrost program.

[0061] In one embodiment, Figure 3 As shown, a method for controlling a fan of an air conditioning system is provided. Figure 1 The condenser of the air conditioning system in the embodiment is taken as an example for explanation. In this embodiment, the first fan is the upper fan 1, the second fan is the upper fan 2, and the partition is arranged between the first fan and the second fan.

[0062] The air conditioning system fan control method in this embodiment includes the following steps:

[0063] S301, determining an air conditioning system operation mode, wherein the air conditioning system operation mode includes a normal mode, a first defrost mode, and a second defrost mode.

[0064] In this embodiment, the air conditioning system operation mode refers to the working mode of the overall unit of the air conditioning system, including but not limited to cooling mode, heating mode, defrosting mode, dehumidification mode, etc. In actual application, when the air conditioning system operates in a low temperature or ultra-low temperature environment, the defrosting mode will be automatically started at intervals to remove the frost layer formed on the outdoor unit heat exchanger. It should be noted that the controller in the air conditioning system can also start the defrosting mode by monitoring the real-time status of the heat exchanger.

[0065] In this embodiment, the air conditioning system operates in a low temperature or ultra-low temperature environment. When the air conditioning system operation mode is normal mode, it means that the air conditioning system operation mode is in heating mode and the outdoor unit has not yet formed a frost layer that requires starting the defrost mode.

[0066] In this embodiment, when the air-conditioning system performs defrosting, it will enter the first defrost mode and the second defrost mode in sequence to ensure that the frost layer on the outdoor unit can be completely removed.

[0067] S302, if the air conditioning system is in normal operation mode, the first partition and the second partition are both in a heat exchange state, the first fan and the second fan are controlled to start, and the partition is controlled to close.

[0068] In this embodiment, the normal mode refers to the operating state before the defrost mode is performed. At this time, the first partition and the second partition operate according to the type of heat exchanger and the state corresponding to the normal mode. The first fan and the second fan are both started at the highest gear, and the partition is controlled to close to isolate the wind field between the first partition and the second partition, ensuring that the air conditioner operates at the best effect.

[0069] It should be noted that the actual gear positions of the first fan and the second fan may also be configured according to the needs of the actual application scenario, which is not limited here.

[0070] S303, if the operation mode of the air conditioning system is the first defrost mode, the first partition is in the defrost state, the second partition is in the heat exchange state, the first fan is controlled to be turned off, the second fan is started, and the partition is controlled to be opened.

[0071] In this embodiment, when the air conditioning system is in the first defrost mode, the thickness of the frost layer on the heat exchanger has met the preset thickness threshold and needs to be defrosted. In the first defrost mode, the frost layer at the first partition is first defrosted, and while the frost layer at the first partition is defrosted, the heat exchange state of the second partition is maintained to ensure the operation effect of the air conditioning system.

[0072] In this embodiment, the upper zone starts defrosting, the first fan is controlled to be turned off, the lower zone maintains the evaporation heat absorption state, and the second fan is controlled to operate. The partition is controlled to open so that the wind fields of the upper and lower zones can circulate, ensuring that the heat of the high-temperature and high-pressure refrigerant during defrosting in the upper zone will not be dissipated by the wind field to the low-temperature environment, which can effectively ensure the defrosting speed of the upper zone.

[0073] In actual application, when the upper zone is defrosting, the compressor of the air-conditioning system will compress the refrigerant into high-temperature and high-pressure gas, and transport the high-temperature and high-pressure gas to the upper zone.

[0074] S304, if the air conditioning system operation mode is the second defrost mode, the first partition is in the heat exchange state, the second partition is in the defrost state, the first fan is controlled to be turned on, the second fan is turned off, and the partition is controlled to be opened.

[0075] In this embodiment, when the air-conditioning system operation mode is the second defrost mode, it means that the frost layer in the first partition of the heat exchanger has been basically removed. At this time, the frost layer in the second partition is further defrosted, and while the second partition is being defrosted, the first partition is restored to the heat exchange state, thereby ensuring the operation effect of the air-conditioning system and delaying the frosting speed of the first partition to ensure that the defrost step is not frequently started.

[0076] In this embodiment, the lower zone starts defrosting, the second fan is controlled to be turned off, the upper zone resumes the evaporation and heat absorption state, and the first fan is controlled to operate. The partition is controlled to open so that the wind fields of the upper and lower zones can circulate, ensuring that the heat of the high-temperature and high-pressure refrigerant during defrosting in the lower zone will not be dissipated by the wind field to the low-temperature environment, and the defrosting speed of the lower zone can be effectively guaranteed.

[0077] The upper half represented by the first partition is defrosted first, and the lower half represented by the second partition is defrosted later, which can effectively ensure that the defrosting effect is more thorough.

[0078] In this embodiment, after the defrosting of the upper zone is completed, the defrosting of the lower zone is continued. The difference from the defrosting of the upper zone is that the identification parameter for controlling the fan gear position changes, and the identification parameter is converted from the real-time temperature of the supercooling section to the real-time temperature of the first zone. After the real-time temperature of the second zone reaches a certain standard, the defrosting mode is exited.

[0079] In summary, this embodiment provides a fan control method for an air conditioning system, which uses zoned defrosting to maintain a continuous heating function, effectively controls part of the heat of the heat exchanger for defrosting, and the other part of the heat for heat exchange, so that the unit does not switch modes during the defrosting process, and maintains stable indoor heat exchange. By setting a partition in the middle of the fan, when any of the fans is turned off, the partition is automatically opened, so that the distribution of the zoned heat exchange wind field is more uniform, and at the same time solves the problem of slow defrosting caused by the wind field interference taking away the heat of the refrigerant to the environment, which can extend the frosting cycle and avoid frequent defrosting.

[0080] In one embodiment, the heat exchanger further comprises a subcooling section, the subcooling section comprises a first temperature sensor, the first subzone comprises a second temperature sensor, and the second subzone comprises a third temperature sensor. Figure 4 As shown, the step of determining the operation mode of the air conditioning system in S301 includes:

[0081] S401, acquiring a first temperature detected by a first temperature sensor, a second temperature detected by a second temperature sensor, and a third temperature detected by a third temperature sensor.

[0082] S402: Determine an air conditioning system operation mode according to the first temperature, the second temperature, and the third temperature.

[0083] In this embodiment, the first temperature sensor can be set at the entrance of the supercooling section, the second temperature sensor can be set at the entrance of the first partition, and the third temperature sensor can be set at the entrance of the second partition. It should be noted that the actual setting positions of the first temperature sensor, the second temperature sensor, and the third temperature sensor can be adaptively configured according to the needs of actual applications.

[0084] In this embodiment, the temperature sensor may be a temperature sensing package or a thermistor, and the actual component type of the temperature sensor may be adaptively replaced.

[0085] In this embodiment, the corresponding air-conditioning system operating mode will cause the real-time temperature of the subcooling section, the first partition and the second partition of the heat exchanger to change. According to the real-time change status of the first temperature, the second temperature and the third temperature, the real-time situation of the air-conditioning system operating mode can be determined.

[0086] In one embodiment, Figure 5 As shown, the step of determining the operating mode of the air conditioning system according to the first temperature, the second temperature and the third temperature in S402 includes:

[0087] S501: If the first temperature is greater than the defrost start threshold temperature, determine that the operation mode of the air-conditioning system is a normal mode.

[0088] S502: If the first temperature is less than or equal to the defrost start threshold temperature, determine that the air-conditioning system operation mode is the first defrost mode.

[0089] S503: If the second temperature is greater than or equal to the defrost exit threshold temperature, determine that the air-conditioning system operation mode is the second defrost mode.

[0090] S504: If the third temperature is greater than or equal to the defrost exit threshold temperature, determine that the air-conditioning system operation mode is a normal mode.

[0091] In this embodiment, when the real-time temperature of the supercooling section is greater than the defrost start threshold temperature T1, it can be determined that the heat exchanger of the air-conditioning unit is not frosted, or the frost layer thickness does not reach the defrost mode start standard. At this time, it can be determined that the air-conditioning system operation mode is normal mode, so that the first fan and the second fan operate normally, and the partition is closed.

[0092] When the real-time temperature of the supercooling section is less than or equal to the defrost start threshold temperature T1, it can be determined that frosting has occurred on the heat exchanger of the air-conditioning unit, and the frost layer thickness has reached the defrost mode start standard. At this time, the air-conditioning system operation mode is determined to enter the first defrost mode, and the defrost process is started on the first partition, the heat exchange state of the second partition is maintained, and the partition is opened.

[0093] When the real-time temperature of the first partition is greater than or equal to the defrost exit threshold temperature T2, it can be determined that the frost layer of the first partition has been removed. At this time, the air-conditioning system enters the second defrost mode, starts to defrost the second partition, and restores the heat exchange state of the first partition, keeping the partition open.

[0094] When the real-time temperature of the second partition is greater than or equal to the defrost exit threshold temperature T2, it can be determined that the frost layers in the first partition and the second partition have been removed. At this time, the air-conditioning system is determined to have returned to normal mode and starts monitoring the real-time temperature of the supercooling section again to facilitate reconfirmation of the frost status of the heat exchanger.

[0095] It should be noted that in this embodiment, T2>0>T1.

[0096] In one embodiment, if the air conditioning system operation mode is the first defrost mode, Figure 6 As shown, the air conditioning system fan control method also includes:

[0097] S601, if the first temperature is less than or equal to the defrost start threshold temperature, and the temperature difference between the first temperature and the defrost start threshold temperature is less than a preset temperature difference threshold, control the second fan to operate at the first gear.

[0098] S602, if the first temperature is less than or equal to the defrost start threshold temperature, and the temperature difference between the first temperature and the defrost start threshold temperature is greater than or equal to the preset temperature difference threshold, control the second fan to operate at the second gear, wherein the second gear is less than the first gear.

[0099] In this embodiment, after the first defrost mode is started, the second fan can first operate at the highest gear until the temperature difference between the first temperature and the defrost start threshold temperature is greater than or equal to the preset temperature difference threshold △TA. If the temperature difference between the first temperature and the defrost start threshold temperature is greater than or equal to the preset temperature difference threshold △TA, it means that the frost layer in the lower half area becomes thicker. At this time, reducing the operating speed of the second fan can avoid the increase of the defrost time caused by the deepening of the frost layer in the lower half area.

[0100] In one embodiment, if the air conditioning system operation mode is the second defrost mode, Figure 7 As shown, the air conditioning system fan control method also includes:

[0101] S701, if the second temperature is greater than or equal to the defrost exit threshold temperature, and the temperature difference between the second temperature and the defrost exit threshold temperature is less than a preset temperature difference threshold, control the first fan to operate at the third gear;

[0102] S702, if the second temperature is greater than or equal to the defrost exit threshold temperature, and the temperature difference between the second temperature and the defrost exit threshold temperature is greater than or equal to the preset temperature difference threshold, control the first fan to operate at the fourth gear, wherein the fourth gear is less than the third gear.

[0103] In this embodiment, after the second defrost mode is started, the first fan may also operate at the highest gear first until the temperature difference between the second temperature and the defrost exit threshold temperature is greater than or equal to the preset temperature difference threshold △TB. The temperature difference between the second temperature and the defrost exit threshold temperature is greater than or equal to the preset temperature difference threshold △TB, indicating that the frost layer in the upper half area has become thicker. At this time, reducing the operating speed of the first fan can avoid the deepening of the frost layer in the upper half area, resulting in a reduction in the defrost cycle.

[0104] This embodiment can effectively reduce the defrosting frequency of the air-conditioning system and extend the frosting cycle by flexibly adjusting the fan gear position, thereby preventing frequent defrosting from causing damage to the air-conditioning system units and affecting the heat exchange effect of the air-conditioning system.

[0105] In one embodiment, when the air conditioning system is in heating state, Figure 8 As shown, the air conditioning system fan control method also includes:

[0106] S801, if the operation mode of the air-conditioning system is the first defrosting mode, the first partition is in the defrosting state, and the second partition is in the heat exchange state, the compressor of the air-conditioning system is controlled to operate, and the valve body assembly on the path from the subcooling section to the first partition is controlled to open, so that the compressor outputs high-temperature and high-pressure steam to the first partition;

[0107] S802, if the air-conditioning system operation mode is the second defrost mode, the first partition is in the heat exchange state, and the second partition is in the defrost state, the compressor of the air-conditioning system is controlled to operate, and the valve body assembly on the path from the subcooling section to the second partition is controlled to open, so that the compressor outputs high-temperature and high-pressure steam to the second partition.

[0108] In this embodiment, if the actual structure of the heat exchanger is as follows Figure 2 As shown, the air-conditioning system operates in the first defrost mode. When the upper zone is defrosting and the lower zone is exchanging heat, the on-off valves 2 and 3 can be controlled to be opened, the on-off valves 1 and 4 can be closed, the throttle valve 1 can be fully opened, the throttle valve 2 can be throttled normally, and the throttle valve 3 can be closed. At this time, the refrigerant is compressed by the compressor and becomes a high-pressure and high-temperature gas. It passes through the throttle valve 1 and the supercooling section to enter the upper zone for defrosting, and then enters the lower zone for evaporation after being throttled by the throttle valve 2.

[0109] The air-conditioning system operates in the second defrost mode. When heat is exchanged in the upper zone and defrosted in the lower zone, on-off valves 1 and 4 can be controlled to be opened, on-off valves 2 and 3 can be closed, throttle valve 1 can be fully opened, throttle valve 2 can be closed, and throttle valve 3 can be throttled normally. At this time, the refrigerant is compressed by the compressor and becomes a high-pressure and high-temperature gas, which passes through throttle valve 1 and the supercooling section to enter the lower zone for defrosting, and then enters the upper zone for evaporation after throttling by throttle valve 3.

[0110] In this embodiment, in the defrost mode, the compressor keeps running throughout the whole process, part of the heat absorbed by the heat exchanger is used for defrosting, and the other part is used for normal heating operation to provide heat for the room, thereby ensuring the stability of the indoor temperature and avoiding additional noise caused by the start and stop of the compressor, which greatly improves the user experience of using the heat pump air-conditioning system.

[0111] It should be noted that this embodiment does not limit the actual valve body structure of the heat exchanger of the air-conditioning system. The heat exchanger can be a condenser or an evaporator, and the valve body structure can be adaptively replaced according to the location and type of the heat exchanger.

[0112] In summary, this embodiment provides a fan control method for an air-conditioning system, which uses zoned defrosting to maintain a continuous heating function, effectively controls part of the heat of the heat exchanger for defrosting, and the other part of the heat for heat exchange, so that the unit does not switch modes during the defrosting process, and maintains stable indoor heat exchange. Through the operation and gear control of the upper and lower fans, the frosting speed is effectively slowed down, the defrosting speed is accelerated, the cycle of rotation defrosting is extended, and the problem of insufficient heat exchange caused by defrosting is solved. By setting a partition in the middle of the fan, when any of the fans is turned off, the partition is automatically opened, so that the distribution of the zoned heat exchange wind field is more uniform, and at the same time, the problem of slow defrosting caused by the wind field interference taking away the heat of the refrigerant to the environment is solved, and the frosting cycle can be extended to avoid frequent defrosting.

[0113] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0114] Based on the same inventive concept, the embodiment of the present application also provides an air conditioning system fan control device for implementing the air conditioning system fan control method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more air conditioning system fan control device embodiments provided below can refer to the limitations of the air conditioning system fan control method above, and will not be repeated here.

[0115] In one embodiment, Fig. 9 As shown, a fan control device 900 for an air conditioning system is provided, comprising: a determination module 910, a first execution module 920, a second execution module 930 and a fourth execution module 940, wherein:

[0116] A determination module 910 is used to determine an air conditioning system operation mode, wherein the air conditioning system operation mode includes a normal mode, a first defrost mode, and a second defrost mode;

[0117] The first execution module 920 is used to control the first fan and the second fan to start and the partition to close if the operation mode of the air conditioning system is the normal mode and the first partition and the second partition are both in the heat exchange state;

[0118] The second execution module 930 is used to control the first fan to be turned off, the second fan to be started, and the partition to be opened if the operation mode of the air-conditioning system is the first defrosting mode, the first partition is in the defrosting state, and the second partition is in the heat exchange state;

[0119] The third execution module 940 is used to control the first fan to turn on, the second fan to turn off, and the partition to open if the air-conditioning system operation mode is the second defrost mode, the first partition is in the heat exchange state, and the second partition is in the defrost state.

[0120] In one embodiment, the determination module 910 is specifically used to obtain a first temperature detected by a first temperature sensor, a second temperature detected by a second temperature sensor, and a third temperature detected by a third temperature sensor; and determine an operating mode of the air-conditioning system according to the first temperature, the second temperature, and the third temperature.

[0121] In one embodiment, the determination module 910 is specifically used to determine that the air-conditioning system operation mode is a normal mode if the first temperature is greater than the defrost start threshold temperature; if the first temperature is less than or equal to the defrost start threshold temperature, determine that the air-conditioning system operation mode is a first defrost mode; if the second temperature is greater than or equal to the defrost exit threshold temperature, determine that the air-conditioning system operation mode is a second defrost mode; if the third temperature is greater than or equal to the defrost exit threshold temperature, determine that the air-conditioning system operation mode is a normal mode.

[0122] In one embodiment, the second execution module 930 is specifically used to control the second fan to operate in the first gear if the first temperature is less than or equal to the defrost start threshold temperature, and the temperature difference between the first temperature and the defrost start threshold temperature is less than the preset temperature difference threshold; if the first temperature is less than or equal to the defrost start threshold temperature, and the temperature difference between the first temperature and the defrost start threshold temperature is greater than or equal to the preset temperature difference threshold, control the second fan to operate in the second gear, wherein the second gear is less than the first gear.

[0123] In one embodiment, the third execution module 940 is specifically used to control the first fan to operate in the third gear if the second temperature is greater than or equal to the defrost exit threshold temperature, and the temperature difference between the second temperature and the defrost exit threshold temperature is less than the preset temperature difference threshold; if the second temperature is greater than or equal to the defrost exit threshold temperature, and the temperature difference between the second temperature and the defrost exit threshold temperature is greater than or equal to the preset temperature difference threshold, control the first fan to operate in the fourth gear, wherein the fourth gear is less than the third gear.

[0124] In one embodiment, the second execution module 930 is specifically used to control the operation of the compressor of the air-conditioning system if the operation mode of the air-conditioning system is the first defrosting mode, the first partition is in the defrosting state, and the second partition is in the heat exchange state, and control the valve body assembly on the path from the subcooling section to the first partition to open, so that the compressor outputs high-temperature and high-pressure steam to the first partition;

[0125] The third execution module 940 is specifically used to control the operation of the compressor of the air-conditioning system if the operation mode of the air-conditioning system is the second defrost mode, the first partition is in the heat exchange state, and the second partition is in the defrost state, and to control the valve body assembly on the path from the subcooling section to the second partition to open, so that the compressor outputs high-temperature and high-pressure steam to the second partition.

[0126] In summary, this embodiment provides a fan control device for an air-conditioning system, which uses zoned defrosting to maintain a continuous heating function, effectively controls part of the heat of the heat exchanger for defrosting, and the other part of the heat for heat exchange, so that the unit does not switch modes during the defrosting process, and maintains stable indoor heat exchange. Through the operation of the upper and lower fans and the gear control, the frosting speed is effectively slowed down, the defrosting speed is accelerated, the cycle of rotation defrosting is extended, and the problem of insufficient heat exchange caused by defrosting is solved. By setting a partition in the middle of the fan, when any of the fans is turned off, the partition is automatically opened, so that the distribution of the zoned heat exchange wind field is more uniform, and at the same time, the problem of slow defrosting caused by the wind field interference taking away the heat of the refrigerant to the environment is solved, and the frosting cycle can be extended to avoid frequent defrosting.

[0127] Each module in the above-mentioned air conditioning system fan control device can be implemented in whole or in part by software, hardware and a combination thereof. Each of the above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory in the computer device in the form of software, so that the processor can call and execute the operations corresponding to each of the above modules.

[0128] In one embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as follows: Fig.10 As shown. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and the external device. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be realized through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a fan control method of an air conditioning system is realized. The display unit of the computer device is used to form a visually visible picture, which can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a button, trackball or touchpad set on the computer device shell, or an external keyboard, touchpad or mouse.

[0129] Those skilled in the art will understand that Fig.10 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0130] In one embodiment, an air conditioning device is provided, comprising the air conditioning system in the aforementioned embodiment.

[0131] In one embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the following steps are implemented:

[0132] Determining an air conditioning system operation mode, wherein the air conditioning system operation mode includes a normal mode, a first defrost mode, and a second defrost mode;

[0133] If the air conditioning system is in normal operation mode, the first partition and the second partition are both in heat exchange state, the first fan and the second fan are controlled to start, and the partition is controlled to close;

[0134] If the air conditioning system is in the first defrosting mode, the first partition is in the defrosting state, the second partition is in the heat exchange state, the first fan is controlled to be turned off, the second fan is started, and the partition is controlled to be opened;

[0135] If the air conditioning system operation mode is the second defrost mode, the first partition is in the heat exchange state, the second partition is in the defrost state, the first fan is controlled to be turned on, the second fan is turned off, and the partition is controlled to be opened.

[0136] In one embodiment, a computer readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

[0137] Determining an air conditioning system operation mode, wherein the air conditioning system operation mode includes a normal mode, a first defrost mode, and a second defrost mode;

[0138] If the air conditioning system is in normal operation mode, the first partition and the second partition are both in heat exchange state, the first fan and the second fan are controlled to start, and the partition is controlled to close;

[0139] If the air conditioning system is in the first defrosting mode, the first partition is in the defrosting state, the second partition is in the heat exchange state, the first fan is controlled to be turned off, the second fan is started, and the partition is controlled to be opened;

[0140] If the air conditioning system operation mode is the second defrost mode, the first partition is in the heat exchange state, the second partition is in the defrost state, the first fan is controlled to be turned on, the second fan is turned off, and the partition is controlled to be opened.

[0141] In one embodiment, a computer program product is provided, comprising a computer program, which, when executed by a processor, implements the following steps:

[0142] Determining an air conditioning system operation mode, wherein the air conditioning system operation mode includes a normal mode, a first defrost mode, and a second defrost mode;

[0143] If the air conditioning system is in normal operation mode, the first partition and the second partition are both in heat exchange state, the first fan and the second fan are controlled to start, and the partition is controlled to close;

[0144] If the air conditioning system is in the first defrosting mode, the first partition is in the defrosting state, the second partition is in the heat exchange state, the first fan is controlled to be turned off, the second fan is started, and the partition is controlled to be opened;

[0145] If the air conditioning system operation mode is the second defrost mode, the first partition is in the heat exchange state, the second partition is in the defrost state, the first fan is controlled to be turned on, the second fan is turned off, and the partition is controlled to be opened.

[0146] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0147] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0148] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for controlling a fan of an air conditioning system, characterized in that: The heat exchanger of the air conditioning system is divided into a first partition and a second partition, wherein the first partition is provided with a first fan, the second partition is provided with a second fan, a partition is provided between the first fan and the second fan, and the partition is used to block the wind field between the first partition and the second partition when the partition is closed, and is used to conduct the wind field between the first partition and the second partition when the partition is opened, including: Determine an air conditioning system operation mode, wherein the air conditioning system operation mode includes a normal mode, a first defrost mode, and a second defrost mode; the heat exchanger further includes a supercooling section, and when the real-time temperature of the supercooling section is less than or equal to a defrost start threshold temperature, determine that the air conditioning system operation mode enters the first defrost mode; If the operation mode of the air conditioning system is the normal mode, the first partition and the second partition are both in the heat exchange state, the first fan and the second fan are controlled to start, and the partition is controlled to close; If the operation mode of the air conditioning system is the first defrosting mode, the first partition is in the defrosting state, the second partition is in the heat exchange state, the first fan is controlled to be turned off, the second fan is started, and the partition is controlled to be opened; If the air conditioning system operation mode is the second defrost mode, the first partition is in a heat exchange state, the second partition is in a defrost state, the first fan is controlled to be turned on, the second fan is controlled to be turned off, and the partition is controlled to be opened.

2. The method according to claim 1, characterized in that The supercooling section includes a first temperature sensor, the first partition includes a second temperature sensor, and the second partition includes a third temperature sensor. The determining the operating mode of the air conditioning system includes: Acquire a first temperature detected by the first temperature sensor, a second temperature detected by the second temperature sensor, and a third temperature detected by the third temperature sensor; The air conditioning system operating mode is determined according to the first temperature, the second temperature, and the third temperature.

3. The method according to claim 2, characterized in that The determining the air conditioning system operation mode according to the first temperature, the second temperature and the third temperature includes: If the first temperature is greater than the defrost start threshold temperature, determining that the air conditioning system operation mode is a normal mode; If the first temperature is less than or equal to the defrost start threshold temperature, determining that the air-conditioning system operation mode is a first defrost mode; If the second temperature is greater than or equal to the defrost exit threshold temperature, determining that the air-conditioning system operation mode is the second defrost mode; If the third temperature is greater than or equal to the defrost exit threshold temperature, it is determined that the operation mode of the air-conditioning system is the normal mode.

4. The method according to claim 2, characterized in that: If the operation mode of the air conditioning system is the first defrost mode, the method further includes: If the first temperature is less than or equal to the defrost start threshold temperature, and the temperature difference between the first temperature and the defrost start threshold temperature is less than a preset temperature difference threshold, controlling the second fan to operate at the first gear; If the first temperature is less than or equal to the defrost start threshold temperature, and the temperature difference between the first temperature and the defrost start threshold temperature is greater than or equal to a preset temperature difference threshold, the second fan is controlled to operate at a second gear, wherein the second gear is lower than the first gear.

5. The method according to claim 2, characterized in that: If the operation mode of the air conditioning system is the second defrost mode, the method further includes: If the second temperature is greater than or equal to the defrost exit threshold temperature, and the temperature difference between the second temperature and the defrost exit threshold temperature is less than a preset temperature difference threshold, controlling the first fan to operate at the third gear; If the second temperature is greater than or equal to the defrost exit threshold temperature, and the temperature difference between the second temperature and the defrost exit threshold temperature is greater than or equal to the preset temperature difference threshold, the first fan is controlled to operate at the fourth gear, wherein the fourth gear is smaller than the third gear.

6. The method according to any one of claims 1 to 5, characterized in that: When the air conditioning system is in a heating state, the method further includes: If the operation mode of the air-conditioning system is the first defrosting mode, the first partition is in the defrosting state, and the second partition is in the heat exchange state, the compressor of the air-conditioning system is controlled to operate, and the valve body assembly on the path from the subcooling section to the first partition is controlled to open, so that the compressor outputs high-temperature and high-pressure steam to the first partition; If the air-conditioning system operating mode is the second defrost mode, the first partition is in a heat exchange state, and the second partition is in a defrost state, the compressor of the air-conditioning system is controlled to operate, and the valve body assembly on the path from the subcooling section to the second partition is controlled to open, so that the compressor outputs high-temperature and high-pressure steam to the second partition.

7. A fan control device for an air conditioning system, characterized in that: The heat exchanger of the air conditioning system is divided into a first partition and a second partition, wherein the first partition is provided with a first fan, the second partition is provided with a second fan, a partition is provided between the first fan and the second fan, and the partition is used to block the wind field between the first partition and the second partition when the partition is closed, and is used to conduct the wind field between the first partition and the second partition when the partition is opened, including: A determination module is used to determine an operation mode of the air conditioning system, wherein the operation mode of the air conditioning system includes a normal mode, a first defrost mode, and a second defrost mode; the heat exchanger further includes a supercooling section, and when the real-time temperature of the supercooling section is less than or equal to the defrost start threshold temperature, it is determined that the operation mode of the air conditioning system enters the first defrost mode; A first execution module is used for controlling the first fan and the second fan to start and the partition to close if the operation mode of the air conditioning system is a normal mode and the first partition and the second partition are both in a heat exchange state; A second execution module is used for controlling the first fan to be turned off, the second fan to be turned on, and the partition to be opened if the operation mode of the air-conditioning system is the first defrosting mode, the first partition is in the defrosting state, and the second partition is in the heat exchange state; The third execution module is used to control the first fan to turn on, the second fan to turn off, and the partition to open if the operating mode of the air-conditioning system is the second defrost mode, the first partition is in a heat exchange state, and the second partition is in a defrost state.

8. An air conditioning system, characterized in that: include: Controllers and heat exchangers; The heat exchanger is divided into a first partition and a second partition, wherein the first partition is provided with a first fan, the second partition is provided with a second fan, a partition is provided between the first fan and the second fan, and the partition is used to block the wind field between the first partition and the second partition when the partition is closed, and is used to conduct the wind field between the first partition and the second partition when the partition is opened; The controller is respectively connected to the heat exchanger, the first fan and the second fan; The controller is used to execute the steps of the air conditioning system fan control method according to any one of claims 1 to 6.

9. An air conditioning device, characterized in that: Includes the air conditioning system as described in claim 8.

10. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, the steps of the air conditioning system fan control method described in any one of claims 1 to 6 are implemented.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the air conditioning system fan control method according to any one of claims 1 to 6 are implemented.

12. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the air conditioning system fan control method described in any one of claims 1 to 6 are implemented.

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