Air conditioner control method and device, air conditioner, storage medium and program product

Abstract

The invention discloses an air conditioner control method and device, an air conditioner, a storage medium and a computer program product, the air conditioner comprises a compressor, an indoor heat exchanger and an inner fan, the indoor heat exchanger comprises at least two groups of parallel heat exchange flow paths, and at least one group of parallel heat exchange flow paths can be independently controlled to be on and off; the method comprises the steps that after a heating mode of the air conditioner is started and a compressor is started, the outdoor environment temperature, the indoor environment temperature, the condensation temperature of an indoor heat exchanger and the operation duration of the compressor are obtained; and according to the outdoor environment temperature, the indoor environment temperature, the condensation temperature and the operation duration of the compressor, the on-off of the parallel heat exchange flow paths which can be independently controlled to be on and off is controlled. According to the scheme, the air conditioner heating start-up pressure difference is rapidly established, and comfort is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of air conditioners, and particularly relates to an air conditioner control method and device, an air conditioner, a storage medium and a computer program product. BACKGROUND

[0002] In a low-temperature environment in winter, an outdoor temperature that is too low can cause slow pressure rise of a condensing side of an air conditioning system. To avoid blowing cold air directly to a user by the indoor heat exchanger due to the refrigerant that has not reached the temperature, the existing air conditioning system needs to set a "cold air prevention" waiting link, that is, the indoor fan must be started after the high-low pressure difference of the system is established to a preset value. However, in this process, the high-low pressure difference establishment efficiency is low, which not only leads to a too long "cold air prevention" waiting time, but also directly causes slow indoor temperature rise, seriously affecting the comfort experience of the user in the initial stage of heating start.

[0003] The above content is only used to assist in understanding the technical solutions of the application and does not represent the acknowledgement of the above content as prior art. SUMMARY

[0004] The application aims to provide an air conditioner control method and device, an air conditioner, a storage medium and a computer program product, to solve the problem of slow high-low pressure difference establishment time after the air conditioner is started in related solutions, and to achieve the effect of fast establishment of the high-low pressure difference of the air conditioner and improved comfort.

[0005] The application provides an air conditioner control method, and the air conditioner comprises a compressor, an indoor heat exchanger and an indoor fan. The indoor heat exchanger comprises at least two groups of parallel heat exchange flow paths, and at least one group of the parallel heat exchange flow paths can be independently controlled to be turned on or turned off. The method comprises the following steps: after the air conditioner is started in a heating mode and the compressor is started, an outdoor environment temperature, an indoor environment temperature, a condensing temperature of the indoor heat exchanger and a running time length of the compressor are obtained; and the parallel heat exchange flow paths that can be independently controlled to be turned on or turned off are controlled to be turned on or turned off according to the outdoor environment temperature, the indoor environment temperature, the condensing temperature and the running time length.

[0006] In some embodiments, the at least two sets of parallel heat exchange flow paths include at least two sets of independently controllable parallel heat exchange flow paths; corresponding to the at least two sets of independently controllable parallel heat exchange flow paths, at least two control valves are provided; the at least two control valves are used to control the total number of on / off states of the parallel heat exchange flow paths of the indoor heat exchanger through a combination of on / off states; the at least two control valves include a first control valve and a second control valve; the method further includes: before starting the compressor, closing the first control valve; controlling the on / off state of the independently controllable parallel heat exchange flow paths according to the outdoor ambient temperature, the indoor ambient temperature, the condensing temperature, and the running time, including: controlling the opening and closing of the second control valve according to the outdoor ambient temperature and the indoor ambient temperature; determining whether the starting conditions of the indoor fan are met according to the condensing temperature; if the starting conditions of the indoor fan are met, then starting the indoor fan, and then controlling the opening of the first control valve and the second control valve according to the condensing temperature and the running time of the compressor.

[0007] In some embodiments, controlling the opening and closing of the second control valve based on the outdoor ambient temperature and the indoor ambient temperature includes: calculating a parameter characterizing whether the high and low pressure difference of the air conditioner can quickly reach the required heating state based on the outdoor ambient temperature and the indoor ambient temperature; determining the relationship between the parameter and a first preset value; if the parameter is greater than or equal to the first preset value, controlling the second control valve to close; if the parameter is less than the first preset value, controlling the second control valve to remain open.

[0008] In some implementations, determining whether the start-up conditions of the indoor fan are met based on the condensation temperature includes: determining the relationship between the condensation temperature and a second preset value; if the condensation temperature is greater than or equal to the second preset value, then it is determined that the start-up conditions of the indoor fan are met, and the operating speed of the indoor fan after startup is obtained by fitting the outdoor ambient temperature, the indoor ambient temperature, and the condensation temperature; if the condensation temperature is less than the second preset value, then it is determined that the start-up conditions of the indoor fan are not met.

[0009] In some embodiments, controlling the opening of the first control valve and the second control valve based on the condensing temperature and the compressor's operating time includes: determining the relationship between the condensing temperature and a third preset value, and the relationship between the compressor's operating time and a fourth preset value; if the condensing temperature is greater than or equal to the third preset value, or the compressor's operating time is greater than or equal to the fourth preset value, then opening the first control valve and the second control valve; if the condensing temperature is less than the third preset value, and the compressor's operating time is less than the fourth preset value, then keeping the states of the first control valve and the second control valve unchanged, and continuously monitoring the condensing temperature and the compressor's operating time until the condensing temperature is greater than or equal to the third preset value, or the compressor's operating time is greater than or equal to the fourth preset value, then opening the first control valve and the second control valve.

[0010] In some implementations, the method further includes: when the start-up conditions of the indoor fan are not met, determining the relationship between the compressor's operating time and a fourth preset value; if the compressor's operating time is greater than or equal to the fourth preset value, optimizing a preset formula based on the outdoor ambient temperature and the indoor ambient temperature, then opening the first control valve and the second control valve, and controlling the indoor fan to operate at a set fan speed; the preset formula is a formula corresponding to the parameter characterizing whether the high and low pressure difference of the air conditioner can quickly reach the state required for heating; if the compressor's operating time is less than the fourth preset value, determining whether the start-up conditions of the indoor fan are met based on the condensing temperature.

[0011] In some embodiments, the flow area of ​​the heat exchange path of the indoor heat exchanger controlled by the first control valve is greater than the flow area of ​​the heat exchange path of the indoor heat exchanger controlled by the second control valve.

[0012] In conjunction with the above method, another aspect of the present invention provides a control device for an air conditioner, the air conditioner including a compressor, an indoor heat exchanger, and an indoor fan; the indoor heat exchanger including at least two sets of parallel heat exchange flow paths, wherein at least one set of the parallel heat exchange flow paths can be independently controlled to open and close; the device includes: an acquisition unit configured to acquire outdoor ambient temperature, indoor ambient temperature, condensing temperature of the indoor heat exchanger, and operating time of the compressor after the air conditioner is turned on in heating mode and the compressor is started; and a control unit configured to control the opening and closing of the independently controllable parallel heat exchange flow paths based on the outdoor ambient temperature, the indoor ambient temperature, the condensing temperature, and the operating time.

[0013] In some embodiments, the at least two sets of parallel heat exchange flow paths include at least two sets of independently controllable parallel heat exchange flow paths; corresponding to the at least two sets of independently controllable parallel heat exchange flow paths, at least two control valves are provided; the at least two control valves are used to control the total number of on / off states of the parallel heat exchange flow paths of the indoor heat exchanger through a combination of on / off states; the at least two control valves include a first control valve and a second control valve; the control unit is further configured to: close the first control valve before starting the compressor; the control unit controls the on / off state of the independently controllable parallel heat exchange flow paths according to the outdoor ambient temperature, the indoor ambient temperature, the condensing temperature, and the running time, including: controlling the opening and closing of the second control valve according to the outdoor ambient temperature and the indoor ambient temperature; determining whether the starting conditions of the indoor fan are met according to the condensing temperature; if the starting conditions of the indoor fan are met, then starting the indoor fan, and then controlling the opening of the first control valve and the second control valve according to the condensing temperature and the running time of the compressor.

[0014] In some embodiments, the control unit controls the opening and closing of the second control valve based on the outdoor ambient temperature and the indoor ambient temperature, including: calculating a parameter characterizing whether the high and low pressure difference of the air conditioner can quickly reach the required heating state based on the outdoor ambient temperature and the indoor ambient temperature; determining the relationship between the parameter and a first preset value; if the parameter is greater than or equal to the first preset value, controlling the second control valve to close; if the parameter is less than the first preset value, controlling the second control valve to remain open.

[0015] In some embodiments, the control unit determines whether the start-up conditions of the indoor fan are met based on the condensation temperature, including: determining the magnitude relationship between the condensation temperature and a second preset value; if the condensation temperature is greater than or equal to the second preset value, then it is determined that the start-up conditions of the indoor fan are met, and the operating speed of the indoor fan after startup is obtained by fitting the outdoor ambient temperature, the indoor ambient temperature, and the condensation temperature; if the condensation temperature is less than the second preset value, then it is determined that the start-up conditions of the indoor fan are not met.

[0016] In some embodiments, the control unit controls the opening of the first control valve and the second control valve based on the condensing temperature and the compressor's operating time, including: determining the relationship between the condensing temperature and a third preset value, and the relationship between the compressor's operating time and a fourth preset value; if the condensing temperature is greater than or equal to the third preset value, or the compressor's operating time is greater than or equal to the fourth preset value, then opening the first control valve and the second control valve; if the condensing temperature is less than the third preset value, and the compressor's operating time is less than the fourth preset value, then keeping the states of the first control valve and the second control valve unchanged, and continuously monitoring the condensing temperature and the compressor's operating time until the condensing temperature is greater than or equal to the third preset value, or the compressor's operating time is greater than or equal to the fourth preset value, then opening the first control valve and the second control valve.

[0017] In some embodiments, the control unit is further configured to: determine the relationship between the compressor's operating time and a fourth preset value when the start-up conditions of the indoor fan are not met; if the compressor's operating time is greater than or equal to the fourth preset value, optimize a preset formula based on the outdoor ambient temperature and the indoor ambient temperature, and then open the first control valve and the second control valve to control the indoor fan to operate at a set fan speed; the preset formula is a formula corresponding to the parameter characterizing whether the high and low pressure difference of the air conditioner can quickly reach the state required for heating; if the compressor's operating time is less than the fourth preset value, determine whether the start-up conditions of the indoor fan are met based on the condensing temperature.

[0018] In some embodiments, the flow area of ​​the heat exchange path of the indoor heat exchanger controlled by the first control valve is greater than the flow area of ​​the heat exchange path of the indoor heat exchanger controlled by the second control valve.

[0019] In conjunction with the above-described device, the present invention further provides an air conditioner, comprising: the control device for the air conditioner described above.

[0020] In conjunction with the above method, the present invention further provides a storage medium comprising a stored program, wherein, when the program is executed, the device on which the storage medium is located controls the air conditioner control method described above to be performed.

[0021] In conjunction with the above method, the present invention further provides a computer program product comprising a computer program that, when processed and executed, implements the steps of the above-described air conditioner control method.

[0022] The present invention provides an air conditioner comprising an indoor heat exchanger and at least two control valves. The indoor heat exchanger includes at least two sets of independently controllable parallel heat exchange flow paths. The at least two control valves control the total number of parallel heat exchange flow paths of the indoor heat exchanger through a combination of on / off states. Each control valve includes a first control valve and a second control valve. After the air conditioner is switched on to heating mode, the first control valve is closed and the compressor is started. The opening and closing of the second control valve is controlled based on the outdoor and indoor ambient temperatures. The starting conditions for the indoor fan are determined based on the condensing temperature. If the starting conditions are met, the indoor fan is started. Subsequently, the first and second control valves are opened based on the condensing temperature and the compressor's operating time. This enables the rapid establishment of the pressure difference during air conditioner heating startup, improving comfort.

[0023] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention.

[0024] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0025] Figure 1 This is a flowchart illustrating an embodiment of the air conditioner control method of the present invention; Figure 2 This is a schematic diagram of the structure of an embodiment of the air conditioner control device of the present invention; Figure 3 This is a system structure diagram of the air conditioner; Figure 4 This is a flowchart illustrating another embodiment of the air conditioning control method.

[0026] Referring to the accompanying drawings, the reference numerals in the embodiments of the present invention are as follows: 1-Compressor; 2-Four-way valve; 3-Outdoor heat exchanger; 4-Outdoor fan; 5-Electronic expansion valve; 6-Indoor heat exchanger; 7-Indoor fan; 8-First control valve; 9-Second control valve; 10-First temperature sensor; 11-Second temperature sensor; 12-Third temperature sensor; 13-Control module; 102-Acquisition unit; 104-Control unit. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0028] According to an embodiment of the present invention, a control method for an air conditioner is provided. The air conditioner includes a compressor, an indoor heat exchanger, and an indoor fan. The indoor heat exchanger includes at least two sets of parallel heat exchange flow paths, wherein at least one set of parallel heat exchange flow paths can be independently controlled to switch on and off. Figure 1 The flowchart of an embodiment of the method of the present invention is shown. The air conditioner control method may include steps S110 and S120.

[0029] In step S110, after the air conditioner turns on the heating mode and starts the compressor, the outdoor ambient temperature, the indoor ambient temperature, the condensing temperature of the indoor heat exchanger, and the running time of the compressor are obtained.

[0030] In some implementations, the first control valve is closed before the compressor is started.

[0031] In the initial stage of heating mode activation, the system needs to quickly establish a high-low pressure difference. If all parallel flow paths of the indoor heat exchanger are open at this time, the refrigerant will be dispersed in multiple flow paths, resulting in insufficient heat exchange intensity per unit flow path. This leads to a slow rise in system high pressure and prolongs the anti-cold air waiting time. Closing the first control valve reduces the number of flow paths involved in heat exchange, concentrating the refrigerant in the remaining flow paths, improving the heat exchange efficiency per unit flow path, and accelerating the accumulation of high-temperature, high-pressure refrigerant in the indoor heat exchanger. This rapidly increases the system high pressure, laying the foundation for establishing a stable high-low pressure difference. Starting the compressor, on the other hand, is to drive the refrigerant to circulate within the system, initiating the entire heating cycle.

[0032] Specifically, when a user or the air conditioner automatically triggers the heating mode operation command, the air conditioner first controls the first control valve to switch to the closed state, cutting off the parallel heat exchange flow path controlled by the control valve (such as...). Figure 3 When the heat exchanger flow paths 201-401, 202-402, and 203-403 are cut off, the flow paths 101-301, 102-302, and 103-303 are open. After the first control valve closes, the air conditioning control compressor starts running. After the compressor starts running, it compresses the refrigerant, converting the low-temperature, low-pressure refrigerant into a high-temperature, high-pressure refrigerant, and then delivers it to the indoor heat exchanger side.

[0033] In step S120, the on / off state of the parallel heat exchange flow path that can be independently controlled is controlled according to the outdoor ambient temperature, the indoor ambient temperature, the condensation temperature, and the operating time.

[0034] In some embodiments, the at least two sets of parallel heat exchange flow paths include at least two sets of independently controllable parallel heat exchange flow paths; corresponding to the at least two sets of independently controllable parallel heat exchange flow paths, at least two control valves are provided; the at least two control valves are used to control the total number of on / off states of the parallel heat exchange flow paths of the indoor heat exchanger through combinations of on / off states; the at least two control valves include a first control valve and a second control valve. For example, the indoor heat exchanger includes a first heat exchange flow path, a second heat exchange flow path, and a third heat exchange flow path arranged in parallel; a first control valve is provided on the first heat exchange flow path to control the on / off state of the first heat exchange flow path; a second control valve is provided on the second heat exchange flow path to control the on / off state of the second heat exchange flow path.

[0035] In some embodiments, the flow area of ​​the heat exchange path of the indoor heat exchanger controlled by the first control valve is greater than the flow area of ​​the heat exchange path of the indoor heat exchanger controlled by the second control valve.

[0036] In air conditioning heating mode, the core objective of flow path adjustment is to quickly establish a high-low pressure difference in the initial stage and achieve stable and efficient heat exchange in the later stage. Different control valves dynamically adjust the flow rate of the heat exchanger's heat exchange path through switching combinations, thereby achieving flexible adaptation of the effective heat exchange area of ​​the indoor heat exchanger. The heat exchange path controlled by the first control valve corresponds to a larger total conduction area. In the initial stage of heating, closing this control valve can significantly reduce the effective conduction area, allowing the refrigerant to quickly concentrate in the remaining flow path, significantly improving the heat exchange intensity per unit flow area and accelerating the rise of system high pressure. The heat exchange path controlled by the second control valve corresponds to a smaller total conduction area. With the first control valve closed, the opening and closing state of this control valve can be further adjusted based on the ambient temperature to achieve a slight adaptation of the effective conduction area. If it is difficult to establish an ambient temperature difference, the second control valve is closed to further reduce the conduction area; if the ambient conditions are good, the second control valve is kept open to avoid excessive reduction of the conduction area, which would lead to insufficient heat exchange efficiency later. This hierarchical control logic allows the adjustment of the flow path conduction area to more accurately adapt to the pressure difference establishment requirements under different environments, taking into account both pressure build-up speed and heat exchange efficiency.

[0037] The system structure of air conditioning is as follows Figure 3As shown, the system includes: compressor 1, four-way valve 2, outdoor heat exchanger 3, outdoor fan 4, electronic expansion valve 5, indoor heat exchanger 6, indoor fan 7, first control valve 8, second control valve 9, first temperature sensor 10, second temperature sensor 11, third temperature sensor 12, and control module 13. The first temperature sensor 10, second temperature sensor 11, and third temperature sensor 12 are used to detect the condensing temperature, indoor ambient temperature, and outdoor ambient temperature, respectively. The indoor heat exchanger 6 includes six parallel heat exchange paths 101-301, 102-302, 103-303, 201-401, 202-402, and 203-403. The first control valve 8 controls the on / off state of heat exchange paths 201-401, 202-402, and 203-403, and the second control valve 9 controls the on / off state of heat exchange path 103-303. When both the first control valve 8 and the second control valve 9 are closed, the refrigerant in the indoor heat exchanger flows only through flow paths 101-301 and 102-302.

[0038] In some implementations, step S120 involves controlling the on / off state of the independently controllable parallel heat exchange path based on the outdoor ambient temperature, the indoor ambient temperature, the condensation temperature, and the operating time, including steps S210 to S230.

[0039] Step S210: Control the opening and closing of the second control valve according to the outdoor ambient temperature and the indoor ambient temperature.

[0040] Different combinations of outdoor and indoor ambient temperatures correspond to varying degrees of difficulty in establishing the high and low pressure differential in the system. For example, when both the outdoor and indoor ambient temperatures are extremely low, establishing the high and low pressure differential is difficult. Simply closing the first control valve to reduce the number of flow paths may not be sufficient to quickly raise the system pressure. In this case, it is necessary to further close the second control valve to reduce the number of flow paths even more, making the refrigerant more concentrated, increasing the heat exchange intensity, and accelerating the establishment of high pressure. When the outdoor ambient temperature is not too low or the indoor ambient temperature is relatively high, establishing the high and low pressure differential is relatively easier. Closing the first control valve alone can meet the requirements for rapid pressure build-up. In this case, keeping the second control valve open can ensure the pressure build-up speed while avoiding insufficient heat exchange efficiency due to too few flow paths. Therefore, it is necessary to determine whether to close the second control valve based on the combination of these two temperature parameters.

[0041] In some embodiments, step S210, controlling the opening and closing of the second control valve based on the outdoor ambient temperature and the indoor ambient temperature, includes: calculating a parameter characterizing whether the high and low pressure difference of the air conditioner can quickly reach the required heating state based on the outdoor ambient temperature and the indoor ambient temperature; determining the relationship between the parameter and a first preset value; if the parameter is greater than or equal to the first preset value, controlling the second control valve to close; if the parameter is less than the first preset value, controlling the second control valve to remain open.

[0042] The parameter characterizing whether an air conditioner can quickly establish the required high and low pressure difference for heating reflects the difficulty of establishing this difference. This parameter is calculated based on outdoor and indoor ambient temperatures and is used to quantify whether the air conditioning system can quickly establish the necessary high and low pressure difference for heating under the current environment. A larger parameter value indicates a higher difficulty in establishing the high and low pressure difference; a smaller parameter value indicates a lower difficulty. The formula for calculating this parameter is an empirical formula derived through testing, and the formula varies for different systems. The process of establishing this empirical formula is as follows: based on the difficulty of establishing the pressure difference corresponding to different indoor and outdoor ambient temperatures obtained from testing, a database is established, and then data fitting is performed. The resulting fitted formula is the empirical formula. For example, a shorter pressure difference establishment time is considered a lower difficulty. A first preset value is used to classify the difficulty of establishing the high and low pressure difference in the system.

[0043] When an air conditioning system is in heating mode, the rate at which the high and low pressure differential is established is mainly affected by the outdoor and indoor ambient temperatures. When the outdoor ambient temperature is too low, the temperature difference between the outdoor heat exchanger and the environment is small, resulting in low heat exchange efficiency and a slow rise in pressure on the system's condenser side. If the indoor ambient temperature is also low at the same time, the heat dissipation demand of the indoor heat exchanger is more urgent, but the system cannot quickly provide enough heat, further increasing the difficulty of establishing the pressure differential. By calculating a parameter that can intuitively reflect the difficulty of establishing the pressure differential, and comparing this parameter with a first preset value, it is possible to clearly determine whether the system needs to further adjust the number of flow paths to accelerate the establishment of the pressure differential under the current environment.

[0044] Specifically, the air conditioner compares the calculated parameter representing the difficulty of establishing a pressure difference with a pre-set first preset value. When the parameter is greater than or equal to the first preset value, the air conditioner sends a shut-off command to the second control valve. Upon receiving the command, the second control valve switches to the closed state, cutting off the parallel heat exchange flow path of the indoor heat exchanger it controls, thus reducing the number of flow paths participating in heat exchange. When the parameter is less than the first preset value, the air conditioner does not change the current open state of the second control valve, keeping the parallel heat exchange flow path of the indoor heat exchanger controlled by the second control valve in a conducting state, maintaining the number of flow paths participating in heat exchange at the current level. Thus, by combining the outdoor and indoor ambient temperatures to calculate the parameter representing the difficulty of establishing a pressure difference, and then controlling the opening and closing of the second control valve, precise adaptation of the number of flow paths to environmental conditions is achieved, ensuring rapid pressure build-up in extreme low-temperature environments.

[0045] Step S220: Determine whether the start-up conditions of the internal fan are met based on the condensation temperature.

[0046] The function of the indoor fan is to blow the heat released by the indoor heat exchanger into the room. If the indoor fan is turned on before a sufficient high-low pressure difference is established in the system, the condensing temperature of the indoor heat exchanger will be low, and the refrigerant will not be able to effectively release heat. The air blown out by the indoor fan will be close to or even lower than room temperature, resulting in cold air blowing directly on the user and affecting user comfort. When the condensing temperature reaches the preset condition, it indicates that a sufficient high-low pressure difference has been established in the system, and the indoor heat exchanger can stably release heat. Turning on the indoor fan at this time ensures that hot air is blown out. Therefore, the condensing temperature is the core indicator for judging the start-up condition of the indoor fan.

[0047] In some implementations, step S220, determining whether the start-up conditions of the indoor fan are met based on the condensation temperature, includes: determining the magnitude relationship between the condensation temperature and a second preset value; if the condensation temperature is greater than or equal to the second preset value, then it is determined that the start-up conditions of the indoor fan are met, and the operating speed of the indoor fan after startup is obtained by fitting the outdoor ambient temperature, the indoor ambient temperature, and the condensation temperature; if the condensation temperature is less than the second preset value, then it is determined that the start-up conditions of the indoor fan are not met.

[0048] The second preset value is used to determine whether the conditions for starting the indoor fan are met. This value is determined based on the heating performance of the air conditioning system, the characteristics of the refrigerant, and the user's comfort requirements. In air conditioning heating mode, the core function of the indoor fan is to transfer the heat released by the indoor heat exchanger to the indoor space. Whether the indoor heat exchanger can release enough heat depends on the condensation temperature of the refrigerant. The higher the condensation temperature, the more heat the refrigerant releases, and the higher the surface temperature of the indoor heat exchanger; conversely, the lower the condensation temperature, the less heat the refrigerant releases, and the lower the surface temperature of the indoor heat exchanger. If the indoor fan is turned on before the condensation temperature is met, the air blown out by the indoor fan will be cold because it has not fully absorbed the heat from the indoor heat exchanger, resulting in cold air blowing directly on the user and affecting user comfort. Therefore, it is necessary to compare the condensation temperature with the second preset value to determine whether the indoor heat exchanger has sufficient heat release capacity and avoid blindly turning on the indoor fan.

[0049] Specifically, the real-time condensing temperature is compared with a pre-set second preset value. When the air conditioner determines that the real-time condensing temperature is greater than or equal to the second preset value, the system generates a "meets the indoor fan start-up conditions" result. This result serves as the basis for subsequently starting the indoor fan, ensuring that it starts at the appropriate time. When the air conditioner determines that the real-time condensing temperature is less than the second preset value, the system generates a "does not meet the indoor fan start-up conditions" result. In this case, the indoor fan remains off, and the air conditioner continues to monitor changes in the condensing temperature until it rises to be greater than or equal to the second preset value, at which point the start-up condition is re-evaluated. This ensures that the indoor fan only starts when the indoor heat exchanger can stably generate heat, avoiding direct cold air blowing and improving comfort. The operating speed of the indoor fan after it is turned on is determined based on the optimal fan speed corresponding to different indoor ambient temperatures, different outdoor ambient temperatures, and different condensing temperatures obtained through testing (this optimal speed is the speed at which a pressure difference can be quickly established under the current parameters, determined through testing). A relevant database is first established, and then the data in the database is fitted to determine the optimal speed using a fitting formula.

[0050] In some implementations, when the start-up conditions of the indoor fan are not met, the relationship between the compressor's operating time and a fourth preset value is determined. If the compressor's operating time is greater than or equal to the fourth preset value, a preset formula is optimized based on the outdoor and indoor ambient temperatures. Then, the first and second control valves are opened, and the indoor fan is controlled to operate at a set fan speed. The preset formula is a formula corresponding to the parameters that characterize whether the high and low pressure difference of the air conditioner can quickly reach the required heating state. If the compressor's operating time is less than the fourth preset value, the start-up conditions of the indoor fan are determined based on the condensing temperature.

[0051] If the indoor fan startup conditions are not met, it indicates that the condensing temperature of the indoor heat exchanger has not reached the preset value, and the system's high and low pressure difference has not yet been established to a state where the indoor fan can be turned on. At this point, it is necessary to further determine the compressor's running time. If the running time is short, it means the system is still in the normal pressure difference establishment phase, and we can continue to wait for the condensing temperature to rise. If the running time has exceeded the fourth preset value, it indicates that the system may be experiencing abnormal pressure difference establishment due to harsh environmental conditions. Relying solely on the original flow path control is insufficient to quickly reach the target; it is necessary to adjust the flow path by optimizing the calculation logic of the pressure difference parameters to avoid prolonged waiting that could negatively impact user experience or cause system malfunctions.

[0052] Specifically, the air conditioner continuously monitors whether the indoor fan start-up conditions are met. When it is determined that the conditions are not met, it simultaneously acquires the cumulative running time of the compressor since its start-up and then compares this running time with a pre-set fourth preset value. When it is determined that the compressor running time is greater than or equal to the fourth preset value, the air conditioner optimizes the calculation of the preset formula corresponding to the parameter representing whether the high and low pressure difference of the air conditioner can quickly reach the state required for heating based on the current outdoor and indoor ambient temperatures, and controls the first and second control valves to switch to the open state, simultaneously adjusting the effective heat exchange flow path conduction area of ​​the indoor heat exchanger, and the indoor fan operates according to the set fan speed. When it is determined that the compressor running time is less than the fourth preset value, the air conditioner does not change the current state of the second control valve, continues to continuously acquire the real-time condensing temperature of the indoor heat exchanger, and compares this real-time condensing temperature with the preset value corresponding to the indoor fan start-up conditions, repeatedly determining whether the indoor fan start-up conditions are met until the conditions are met or the compressor running time reaches the fourth preset value.

[0053] Step S230: If the start-up conditions of the internal fan are met, the internal fan is turned on, and then the opening of the first control valve and the second control valve is controlled according to the condensing temperature and the running time of the compressor.

[0054] Meeting the conditions for starting the indoor fan indicates that the system has established a basic high-low pressure difference. Turning on the indoor fan will transfer the heat released by the indoor heat exchanger to the room, starting to raise the indoor temperature. However, at this time, the system may not have reached its optimal heating state. If the reduced number of flow paths is maintained for an extended period, the heating efficiency will decrease due to insufficient heat exchange area. When the condensing temperature rises further to a higher preset value, it indicates that the system high pressure is sufficiently stable. Restoring all flow paths (opening the first and second control valves) can expand the heat exchange area and improve the overall heating efficiency. If the condensing temperature has not reached a higher preset value but the compressor has been running for a long time, all flow paths should also be restored to avoid system malfunctions caused by prolonged operation with small flow paths. Therefore, it is necessary to combine the condensing temperature and the compressor's operating time to determine whether to restore all flow paths.

[0055] In some embodiments, step S230, controlling the opening of the first control valve and the second control valve based on the condensing temperature and the compressor's operating time, includes: determining the relationship between the condensing temperature and a third preset value, and the relationship between the compressor's operating time and a fourth preset value; if the condensing temperature is greater than or equal to the third preset value, or the compressor's operating time is greater than or equal to the fourth preset value, then opening the first control valve and the second control valve; if the condensing temperature is less than the third preset value, and the compressor's operating time is less than the fourth preset value, then keeping the states of the first control valve and the second control valve unchanged, and continuously monitoring the condensing temperature and the compressor's operating time until the condensing temperature is greater than or equal to the third preset value, or the compressor's operating time is greater than or equal to the fourth preset value, then opening the first control valve and the second control valve.

[0056] The third preset value is the critical value of condensing temperature used to determine whether the system has established a stable high and low pressure difference and can restore all flow paths of the indoor heat exchanger. The fourth preset value is the critical value of compressor running time used to determine whether it is necessary to forcibly restore all flow paths of the indoor heat exchanger.

[0057] After the indoor fan is turned on, the system needs to find a balance between "ensuring a stable high-low pressure difference" and "avoiding insufficient heating efficiency due to prolonged operation with a small flow path." When the condensing temperature reaches the third preset value, it indicates that the system has established a stable high-low pressure difference, and the indoor heat exchanger can achieve efficient heat exchange through all flow paths. However, if the condensing temperature fails to reach the third preset value for an extended period, but the compressor has been running for a considerable time (reaching the fourth preset value), continuing to maintain a small flow path may lead to excessive system load or abnormal refrigerant circulation. In such cases, forced flow path recovery must be triggered by prolonged operation. Therefore, both conditions must be assessed simultaneously to ensure system stability while avoiding abnormal operation.

[0058] Specifically, after the air conditioner turns on the indoor fan, it continuously acquires the real-time condensing temperature of the indoor heat exchanger and the cumulative running time of the compressor. Then, it compares the real-time condensing temperature with a third preset value and the cumulative running time of the compressor with a fourth preset value. When the air conditioner determines that either the "condensing temperature ≥ the third preset value" or the "running time ≥ the fourth preset value" condition is met, it sends an opening command to the first and second control valves respectively. Upon receiving the command, the two control valves switch to the open state, ensuring that all parallel heat exchange paths in the indoor heat exchanger are connected and participate in the refrigerant heat exchange cycle. The system switches from "rapid pressure build-up mode" to "normal heating mode." When the air conditioner determines that both the "condensing temperature < the third preset value" and the "running time < the fourth preset value" condition are met, it does not send any state adjustment command to the first and second control valves, maintaining the current on / off state of the two control valves unchanged. Simultaneously, it continues to monitor the condensing temperature and compressor running time, re-judging the conditions every preset time interval until either recovery condition is met. This allows for timely restoration of all flow paths to improve heating efficiency when the system is stable, and also forcibly restores the flow paths after a timeout to avoid abnormalities, thus balancing heating performance and system safety.

[0059] In some implementations, after the indoor fan is turned on, the operating speed of the indoor fan is determined based on the outdoor ambient temperature, the indoor ambient temperature, and the condensing temperature of the indoor heat exchanger.

[0060] The selection of the indoor fan's operating setting must simultaneously match both the "system heating capacity" and the "indoor heating demand," both of which are determined by different temperature parameters. The outdoor ambient temperature and the condensing temperature of the indoor heat exchanger together reflect the system's heating capacity. When the outdoor ambient temperature is too low, the system's heating efficiency decreases, and the indoor heat exchanger's condensing temperature may be low. If an excessively high setting is selected, the excessive airflow may result in insufficient hot air temperature. The indoor ambient temperature reflects the indoor heating demand. The greater the difference between the indoor ambient temperature and the target temperature, the more urgent the heating demand, requiring an appropriate increase in the fan speed to accelerate heat transfer. Relying solely on a single temperature parameter to determine the fan speed can easily lead to problems such as "the setting is too high but the hot air temperature is insufficient" or "the setting is too low but the heating demand is urgent." Therefore, it is necessary to combine the outdoor ambient temperature, indoor ambient temperature, and the indoor heat exchanger's condensing temperature to comprehensively assess the matching relationship between the system's heating capacity and indoor demand, and determine the most suitable indoor fan operating setting.

[0061] Specifically, when the indoor fan is turned on according to the start-up conditions, the air conditioner first continuously obtains the current outdoor ambient temperature, indoor ambient temperature, and condensing temperature of the indoor heat exchanger; then it substitutes these three temperature parameters into the preset gear judgment logic (such as through parameter weighting calculation, interval matching, etc.), which will output the corresponding optimal operating gear according to different temperature combinations; finally, the air conditioner controls the indoor fan to operate at the determined operating gear, so as to achieve a precise match between the air volume and the system heating capacity and indoor demand.

[0062] For example, when the outdoor ambient temperature is ≤-10℃ and the condensing temperature is ≤30℃, regardless of the indoor ambient temperature, the low setting should be selected first (to avoid excessive airflow leading to insufficient hot air temperature); when the outdoor ambient temperature is >-10℃ and ≤0℃, and the condensing temperature is >30℃ and ≤38℃, if the indoor ambient temperature is ≤12℃, the medium setting should be selected (urgent demand requires faster heating), and if the indoor ambient temperature is >12℃, the low setting should be selected (moderate demand avoids excessive airflow); when the outdoor ambient temperature is >0℃ and the condensing temperature is >38℃, if the indoor ambient temperature is ≤15℃, the high setting should be selected (strong heating capacity, urgent demand, rapid temperature rise), and if the indoor ambient temperature is >15℃, the medium setting should be selected (reduced demand, balancing efficiency and comfort).

[0063] This invention reduces the number of flow paths by initially closing the first control valve in the heating mode, and controlling the opening and closing of the second control valve based on the outdoor and indoor ambient temperatures. This concentrates the refrigerant in a small number of flow paths, increasing the heat exchange intensity per unit flow path, accelerating the rise of system high pressure, effectively shortening the time to establish the high and low pressure difference, and reducing the waiting time for cold air. The condensing temperature of the indoor heat exchanger is used as the criterion for starting the indoor fan, ensuring that the indoor fan is only activated when the system has established a sufficient high and low pressure difference and the indoor heat exchanger can stably release heat. This fundamentally avoids the problem of direct cold air blowing caused by activating the indoor fan before reaching the desired temperature, improving user comfort. After the indoor fan is activated, the first and second control valves are opened based on the condensing temperature and compressor operating time. Once the system high pressure stabilizes, all flow paths are restored. This ensures rapid initial pressure build-up while avoiding insufficient heating efficiency caused by prolonged operation with small flow paths. Furthermore, the auxiliary judgment based on compressor operating time prevents system abnormalities and improves overall operational stability.

[0064] For example, suppose an air conditioner's indoor heat exchanger contains 6 independently operable parallel heat exchange paths. A first control valve controls the on / off state of 3 of these paths, a second control valve controls the on / off state of 2 of these paths, and the remaining path is normally open. The preset condensing temperature corresponding to the indoor fan starting is 27°C, and the preset condensing temperature corresponding to restoring all paths is 40°C, with a preset duration of 2 minutes. When the outdoor ambient temperature is -5°C and the indoor ambient temperature is 10°C in winter, after the air conditioner turns on heating mode, it first closes the first control valve, cutting off the 3 paths it controls. At this time, the 1 normally open path and the 2 paths controlled by the second control valve (a total of 3 paths) participate in heat exchange, and simultaneously starts the compressor. The outdoor ambient temperature of -5°C and the indoor ambient temperature of 10°C are then measured. Once the indoor ambient temperature reaches 10℃, it is determined that establishing a pressure difference under the current environment is difficult. The second control valve is closed, cutting off the two sets of flow paths it controls. At this time, only the normally open flow path participates in heat exchange, and the refrigerant concentrates in this flow path, rapidly increasing the condensing temperature. When the condensing temperature rises to 27℃, it is determined that the conditions for starting the indoor fan are met, and the indoor fan is turned on to blow hot air into the room. After the indoor fan is turned on, the condensing temperature and compressor running time are continuously monitored. If the condensing temperature rises to 40℃ after 1.5 minutes, both the first and second control valves are opened, and all six flow paths participate in heat exchange, restoring normal heating. If the condensing temperature still does not rise to 40℃ after 2 minutes, the first and second control valves are also opened to restore all flow paths.

[0065] Figure 4 This is a flowchart illustrating another embodiment of an air conditioner control method, the method comprising: Step 1: After the air conditioner is turned on for heating, the first control valve is closed and the compressor starts; calculate the parameter X = f(T) that characterizes the difficulty of establishing a high-low pressure difference in the air conditioning system. 室内 T 室外 ).

[0066] Step 2, determine whether X ≥ X A If X≥X A Then the second control valve is closed; if X < X A Then keep the second control valve open.

[0067] Step 3, determine if T 冷凝 ≥T A If T 冷凝 ≥T A Then turn on the interior fan, and set the fan speed K = f(T) 室内 T 室外 T 冷凝 ), then proceed to step 4; if T 冷凝 <T A Then keep the internal fan off, and then proceed to step 5.

[0068] Step 4, determine whether T is satisfied.冷凝 ≥ T B Or the compressor running time t ≥ t1. If T 冷凝 ≥ T B If t≥t1, then both the first and second control valves are in the open state, restoring the normal flow path control of the system, and the internal fan operates according to the user-set wind speed; otherwise, step 4 is executed again.

[0069] Step 5: Determine if the compressor running time t ≥ t1. If t ≥ t1, the calculated X value needs to be optimized and updated. 室内 T 室外 The formula for calculating the value of X is then re-optimized. Afterwards, both the first and second control valves are kept open, restoring normal system flow control. The internal fan operates according to the user-set fan speed. If t < t1, proceed to step 3.

[0070] The technical solution of this embodiment includes an indoor heat exchanger and at least two control valves. The indoor heat exchanger includes at least two sets of parallel heat exchange flow paths that can be independently controlled to open and close. The at least two control valves control the total number of parallel heat exchange flow paths of the indoor heat exchanger through a combination of on / off states. Each control valve includes a first control valve and a second control valve. After the air conditioner starts in heating mode, the first control valve is closed and the compressor is started. The opening and closing of the second control valve is controlled according to the outdoor and indoor ambient temperatures. The starting conditions for the indoor fan are determined based on the condensing temperature. If the starting conditions are met, the indoor fan is started. Subsequently, the first and second control valves are opened according to the condensing temperature and the compressor's operating time. This allows for the rapid establishment of the pressure difference when the air conditioner starts heating, improving comfort.

[0071] According to an embodiment of the present invention, a control device for an air conditioner corresponding to the control method for an air conditioner is also provided. The air conditioner includes a compressor, an indoor heat exchanger, and an indoor fan; the indoor heat exchanger includes at least two sets of parallel heat exchange flow paths, wherein at least one set of the parallel heat exchange flow paths can be independently controlled to switch on and off. See also... Figure 2 The diagram shows a structural schematic of an embodiment of the device of the present invention. The control device for the air conditioner may include: an acquisition unit 102 and a control unit 104.

[0072] The acquisition unit 102 is configured to acquire the outdoor ambient temperature, the indoor ambient temperature, the condensing temperature of the indoor heat exchanger, and the running time of the compressor after the air conditioner turns on the heating mode and starts the compressor.

[0073] In some embodiments, the acquisition unit 102 is also configured to close the first control valve before starting the compressor.

[0074] In the initial stage of heating mode activation, the system needs to quickly establish a high-low pressure difference. If all parallel flow paths of the indoor heat exchanger are open at this time, the refrigerant will be dispersed in multiple flow paths, resulting in insufficient heat exchange intensity per unit flow path. This leads to a slow rise in system high pressure and prolongs the anti-cold air waiting time. Closing the first control valve reduces the number of flow paths involved in heat exchange, concentrating the refrigerant in the remaining flow paths, improving the heat exchange efficiency per unit flow path, and accelerating the accumulation of high-temperature, high-pressure refrigerant in the indoor heat exchanger. This rapidly increases the system high pressure, laying the foundation for establishing a stable high-low pressure difference. Starting the compressor, on the other hand, is to drive the refrigerant to circulate within the system, initiating the entire heating cycle.

[0075] Specifically, when a user or the air conditioner automatically triggers the heating mode operation command, the air conditioner first controls the first control valve to switch to the closed state, cutting off the parallel heat exchange flow path controlled by the control valve (such as...). Figure 3 When the heat exchanger flow paths 201-401, 202-402, and 203-403 are cut off, the flow paths 101-301, 102-302, and 103-303 are open. After the first control valve closes, the air conditioning control compressor starts running. After the compressor starts running, it compresses the refrigerant, converting the low-temperature, low-pressure refrigerant into a high-temperature, high-pressure refrigerant, and then delivers it to the indoor heat exchanger side.

[0076] Control unit 104 is configured to control the on / off state of the independently controllable parallel heat exchange flow path based on the outdoor ambient temperature, the indoor ambient temperature, the condensing temperature, and the operating time.

[0077] In some embodiments, the at least two sets of parallel heat exchange flow paths include at least two sets of independently controllable parallel heat exchange flow paths; corresponding to the at least two sets of independently controllable parallel heat exchange flow paths, at least two control valves are provided; the at least two control valves are used to control the total number of on / off states of the parallel heat exchange flow paths of the indoor heat exchanger through combinations of on / off states; the at least two control valves include a first control valve and a second control valve. For example, the indoor heat exchanger includes a first heat exchange flow path, a second heat exchange flow path, and a third heat exchange flow path arranged in parallel; a first control valve is provided on the first heat exchange flow path to control the on / off state of the first heat exchange flow path; a second control valve is provided on the second heat exchange flow path to control the on / off state of the second heat exchange flow path.

[0078] In some embodiments, the flow area of ​​the heat exchange path of the indoor heat exchanger controlled by the first control valve is greater than the flow area of ​​the heat exchange path of the indoor heat exchanger controlled by the second control valve.

[0079] In air conditioning heating mode, the core objective of flow path adjustment is to quickly establish a high-low pressure difference in the initial stage and achieve stable and efficient heat exchange in the later stage. Different control valves dynamically adjust the flow rate of the heat exchanger's heat exchange path through switching combinations, thereby achieving flexible adaptation of the effective heat exchange area of ​​the indoor heat exchanger. The heat exchange path controlled by the first control valve corresponds to a larger total conduction area. In the initial stage of heating, closing this control valve can significantly reduce the effective conduction area, allowing the refrigerant to quickly concentrate in the remaining flow path, significantly improving the heat exchange intensity per unit flow area and accelerating the rise of system high pressure. The heat exchange path controlled by the second control valve corresponds to a smaller total conduction area. With the first control valve closed, the opening and closing state of this control valve can be further adjusted based on the ambient temperature to achieve a slight adaptation of the effective conduction area. If it is difficult to establish an ambient temperature difference, the second control valve is closed to further reduce the conduction area; if the ambient conditions are good, the second control valve is kept open to avoid excessive reduction of the conduction area, which would lead to insufficient heat exchange efficiency later. This hierarchical control logic allows the adjustment of the flow path conduction area to more accurately adapt to the pressure difference establishment requirements under different environments, taking into account both pressure build-up speed and heat exchange efficiency.

[0080] In some embodiments, the control unit 104 controls the on / off switching of the independently controllable parallel heat exchange path based on the outdoor ambient temperature, the indoor ambient temperature, the condensing temperature, and the operating time, including: The control unit 104 is further configured to control the opening and closing of the second control valve based on the outdoor ambient temperature and the indoor ambient temperature.

[0081] Different combinations of outdoor and indoor ambient temperatures correspond to varying degrees of difficulty in establishing the high and low pressure differential in the system. For example, when both the outdoor and indoor ambient temperatures are extremely low, establishing the high and low pressure differential is difficult. Simply closing the first control valve to reduce the number of flow paths may not be sufficient to quickly raise the system pressure. In this case, it is necessary to further close the second control valve to reduce the number of flow paths even more, making the refrigerant more concentrated, increasing the heat exchange intensity, and accelerating the establishment of high pressure. When the outdoor ambient temperature is not too low or the indoor ambient temperature is relatively high, establishing the high and low pressure differential is relatively easier. Closing the first control valve alone can meet the requirements for rapid pressure build-up. In this case, keeping the second control valve open can ensure the pressure build-up speed while avoiding insufficient heat exchange efficiency due to too few flow paths. Therefore, it is necessary to determine whether to close the second control valve based on the combination of these two temperature parameters.

[0082] In some embodiments, the control unit 104 controls the opening and closing of the second control valve based on the outdoor ambient temperature and the indoor ambient temperature, including: calculating a parameter characterizing whether the high and low pressure difference of the air conditioner can quickly reach the required heating state based on the outdoor ambient temperature and the indoor ambient temperature; determining the relationship between the parameter and a first preset value; if the parameter is greater than or equal to the first preset value, controlling the second control valve to close; if the parameter is less than the first preset value, controlling the second control valve to remain open.

[0083] The parameter characterizing whether an air conditioner can quickly establish the required high and low pressure difference for heating reflects the difficulty of establishing this difference. This parameter is calculated based on outdoor and indoor ambient temperatures and is used to quantify whether the air conditioning system can quickly establish the necessary high and low pressure difference under the current environment. A larger parameter value indicates greater difficulty in establishing the high and low pressure difference; a smaller value indicates less difficulty. The formula for calculating this parameter is an empirical formula derived through testing, and the formula varies for different systems. A first preset value is used to classify the difficulty of establishing the high and low pressure difference.

[0084] When an air conditioning system is in heating mode, the rate at which the high and low pressure differential is established is mainly affected by the outdoor and indoor ambient temperatures. When the outdoor ambient temperature is too low, the temperature difference between the outdoor heat exchanger and the environment is small, resulting in low heat exchange efficiency and a slow rise in pressure on the system's condenser side. If the indoor ambient temperature is also low at the same time, the heat dissipation demand of the indoor heat exchanger is more urgent, but the system cannot quickly provide enough heat, further increasing the difficulty of establishing the pressure differential. By calculating a parameter that can intuitively reflect the difficulty of establishing the pressure differential, and comparing this parameter with a first preset value, it is possible to clearly determine whether the system needs to further adjust the number of flow paths to accelerate the establishment of the pressure differential under the current environment.

[0085] Specifically, the air conditioner compares the calculated parameter representing the difficulty of establishing a pressure difference with a pre-set first preset value. When the parameter is greater than or equal to the first preset value, the air conditioner sends a shut-off command to the second control valve. Upon receiving the command, the second control valve switches to the closed state, cutting off the parallel heat exchange flow path of the indoor heat exchanger it controls, thus reducing the number of flow paths participating in heat exchange. When the parameter is less than the first preset value, the air conditioner does not change the current open state of the second control valve, keeping the parallel heat exchange flow path of the indoor heat exchanger controlled by the second control valve in a conducting state, maintaining the number of flow paths participating in heat exchange at the current level. Thus, by combining the outdoor and indoor ambient temperatures to calculate the parameter representing the difficulty of establishing a pressure difference, and then controlling the opening and closing of the second control valve, precise adaptation of the number of flow paths to environmental conditions is achieved, ensuring rapid pressure build-up in extreme low-temperature environments.

[0086] The control unit 104 is also configured to determine whether the start-up conditions of the internal fan are met based on the condensation temperature.

[0087] The function of the indoor fan is to blow the heat released by the indoor heat exchanger into the room. If the indoor fan is turned on before a sufficient high-low pressure difference is established in the system, the condensing temperature of the indoor heat exchanger will be low, and the refrigerant will not be able to effectively release heat. The air blown out by the indoor fan will be close to or even lower than room temperature, resulting in cold air blowing directly on the user and affecting user comfort. When the condensing temperature reaches the preset condition, it indicates that a sufficient high-low pressure difference has been established in the system, and the indoor heat exchanger can stably release heat. Turning on the indoor fan at this time ensures that hot air is blown out. Therefore, the condensing temperature is the core indicator for judging the start-up condition of the indoor fan.

[0088] In some embodiments, the control unit 104 determines whether the start-up conditions of the indoor fan are met based on the condensation temperature, including: determining the relationship between the condensation temperature and a second preset value; if the condensation temperature is greater than or equal to the second preset value, then it is determined that the start-up conditions of the indoor fan are met, and the operating speed of the indoor fan after startup is obtained by fitting the outdoor ambient temperature, the indoor ambient temperature, and the condensation temperature; if the condensation temperature is less than the second preset value, then it is determined that the start-up conditions of the indoor fan are not met.

[0089] The second preset value is used to determine whether the conditions for starting the indoor fan are met. This value is determined based on the heating performance of the air conditioning system, the characteristics of the refrigerant, and the user's comfort requirements. In air conditioning heating mode, the core function of the indoor fan is to transfer the heat released by the indoor heat exchanger to the indoor space. Whether the indoor heat exchanger can release enough heat depends on the condensation temperature of the refrigerant. The higher the condensation temperature, the more heat the refrigerant releases, and the higher the surface temperature of the indoor heat exchanger; conversely, the lower the condensation temperature, the less heat the refrigerant releases, and the lower the surface temperature of the indoor heat exchanger. If the indoor fan is turned on before the condensation temperature is met, the air blown out by the indoor fan will be cold because it has not fully absorbed the heat from the indoor heat exchanger, resulting in cold air blowing directly on the user and affecting user comfort. Therefore, it is necessary to compare the condensation temperature with the second preset value to determine whether the indoor heat exchanger has sufficient heat release capacity and avoid blindly turning on the indoor fan.

[0090] Specifically, the real-time condensing temperature is compared with a pre-set second preset value. When the air conditioner determines that the real-time condensing temperature is greater than or equal to the second preset value, the system generates a "meets the indoor fan start-up conditions" result. This result serves as the basis for subsequently starting the indoor fan, ensuring that it starts at the appropriate time. When the air conditioner determines that the real-time condensing temperature is less than the second preset value, the system generates a "does not meet the indoor fan start-up conditions" result. In this case, the indoor fan remains off, and the air conditioner continues to monitor changes in the condensing temperature until it rises to be greater than or equal to the second preset value, at which point the start-up condition is re-evaluated. This ensures that the indoor fan only starts when the indoor heat exchanger is stably generating heat, avoiding direct cold air blowing and improving comfort.

[0091] In some embodiments, the control unit 104 is further configured to: determine the relationship between the compressor's operating time and a fourth preset value when the start-up conditions of the indoor fan are not met; if the compressor's operating time is greater than or equal to the fourth preset value, optimize a preset formula based on the outdoor ambient temperature and the indoor ambient temperature, and then open the first control valve and the second control valve to control the indoor fan to operate at a set fan speed; the preset formula is a formula corresponding to the parameter characterizing whether the high and low pressure difference of the air conditioner can quickly reach the state required for heating; if the compressor's operating time is less than the fourth preset value, determine whether the start-up conditions of the indoor fan are met based on the condensing temperature.

[0092] If the indoor fan startup conditions are not met, it indicates that the condensing temperature of the indoor heat exchanger has not reached the preset value, and the system's high and low pressure difference has not yet been established to a state where the indoor fan can be turned on. At this point, it is necessary to further determine the compressor's running time. If the running time is short, it means the system is still in the normal pressure difference establishment phase, and we can continue to wait for the condensing temperature to rise. If the running time has exceeded the fourth preset value, it indicates that the system may be experiencing abnormal pressure difference establishment due to harsh environmental conditions. Relying solely on the original flow path control is insufficient to quickly reach the target; it is necessary to adjust the flow path by optimizing the calculation logic of the pressure difference parameters to avoid prolonged waiting that could negatively impact user experience or cause system malfunctions.

[0093] Specifically, the air conditioner continuously monitors whether the indoor fan start-up conditions are met. When it is determined that the conditions are not met, it simultaneously acquires the cumulative running time of the compressor since its start-up and then compares this running time with a pre-set fourth preset value. When it is determined that the compressor running time is greater than or equal to the fourth preset value, the air conditioner optimizes the calculation of the preset formula corresponding to the parameter representing whether the high and low pressure difference of the air conditioner can quickly reach the state required for heating based on the current outdoor and indoor ambient temperatures, and controls the first and second control valves to switch to the open state, simultaneously adjusting the effective heat exchange flow path conduction area of ​​the indoor heat exchanger, and the indoor fan operates according to the set fan speed. When it is determined that the compressor running time is less than the fourth preset value, the air conditioner does not change the current state of the second control valve, continues to continuously acquire the real-time condensing temperature of the indoor heat exchanger, and compares this real-time condensing temperature with the preset value corresponding to the indoor fan start-up conditions, repeatedly determining whether the indoor fan start-up conditions are met until the conditions are met or the compressor running time reaches the fourth preset value.

[0094] The control unit 104 is further configured to turn on the internal fan if the start-up conditions of the internal fan are met, and then control the opening of the first control valve and the second control valve according to the condensing temperature and the running time of the compressor.

[0095] Meeting the conditions for starting the indoor fan indicates that the system has established a basic high-low pressure difference. Turning on the indoor fan will transfer the heat released by the indoor heat exchanger to the room, starting to raise the indoor temperature. However, at this time, the system may not have reached its optimal heating state. If the reduced number of flow paths is maintained for an extended period, the heating efficiency will decrease due to insufficient heat exchange area. When the condensing temperature rises further to a higher preset value, it indicates that the system high pressure is sufficiently stable. Restoring all flow paths (opening the first and second control valves) can expand the heat exchange area and improve the overall heating efficiency. If the condensing temperature has not reached a higher preset value but the compressor has been running for a long time, all flow paths should also be restored to avoid system malfunctions caused by prolonged operation with small flow paths. Therefore, it is necessary to combine the condensing temperature and the compressor's operating time to determine whether to restore all flow paths.

[0096] In some embodiments, the control unit 104 controls the opening of the first control valve and the second control valve based on the condensing temperature and the compressor's operating time, including: determining the relationship between the condensing temperature and a third preset value, and the relationship between the compressor's operating time and a fourth preset value; if the condensing temperature is greater than or equal to the third preset value, or the compressor's operating time is greater than or equal to the fourth preset value, then opening the first control valve and the second control valve; if the condensing temperature is less than the third preset value, and the compressor's operating time is less than the fourth preset value, then keeping the states of the first control valve and the second control valve unchanged, and continuously monitoring the condensing temperature and the compressor's operating time until the condensing temperature is greater than or equal to the third preset value, or the compressor's operating time is greater than or equal to the fourth preset value, then opening the first control valve and the second control valve.

[0097] The third preset value is the critical value of condensing temperature used to determine whether the system has established a stable high and low pressure difference and can restore all flow paths of the indoor heat exchanger. The fourth preset value is the critical value of compressor running time used to determine whether it is necessary to forcibly restore all flow paths of the indoor heat exchanger.

[0098] After the indoor fan is turned on, the system needs to find a balance between "ensuring a stable high-low pressure difference" and "avoiding insufficient heating efficiency due to prolonged operation with a small flow path." When the condensing temperature reaches the third preset value, it indicates that the system has established a stable high-low pressure difference, and the indoor heat exchanger can achieve efficient heat exchange through all flow paths. However, if the condensing temperature fails to reach the third preset value for an extended period, but the compressor has been running for a considerable time (reaching the fourth preset value), continuing to maintain a small flow path may lead to excessive system load or abnormal refrigerant circulation. In such cases, forced flow path recovery must be triggered by prolonged operation. Therefore, both conditions must be assessed simultaneously to ensure system stability while avoiding abnormal operation.

[0099] Specifically, after the air conditioner turns on the indoor fan, it continuously acquires the real-time condensing temperature of the indoor heat exchanger and the cumulative running time of the compressor. Then, it compares the real-time condensing temperature with a third preset value and the cumulative running time of the compressor with a fourth preset value. When the air conditioner determines that either the "condensing temperature ≥ the third preset value" or the "running time ≥ the fourth preset value" condition is met, it sends an opening command to the first and second control valves respectively. Upon receiving the command, the two control valves switch to the open state, ensuring that all parallel heat exchange paths in the indoor heat exchanger are connected and participate in the refrigerant heat exchange cycle. The system switches from "rapid pressure build-up mode" to "normal heating mode." When the air conditioner determines that both the "condensing temperature < the third preset value" and the "running time < the fourth preset value" condition are met, it does not send any state adjustment command to the first and second control valves, maintaining the current on / off state of the two control valves unchanged. Simultaneously, it continues to monitor the condensing temperature and compressor running time, re-judging the conditions every preset time interval until either recovery condition is met. This allows for timely restoration of all flow paths to improve heating efficiency when the system is stable, and also forcibly restores the flow paths after a timeout to avoid abnormalities, thus balancing heating performance and system safety.

[0100] In some implementations, after the indoor fan is turned on, the operating speed of the indoor fan is determined based on the outdoor ambient temperature, the indoor ambient temperature, and the condensing temperature of the indoor heat exchanger.

[0101] The selection of the indoor fan's operating setting must simultaneously match both the "system heating capacity" and the "indoor heating demand," both of which are determined by different temperature parameters. The outdoor ambient temperature and the condensing temperature of the indoor heat exchanger together reflect the system's heating capacity. When the outdoor ambient temperature is too low, the system's heating efficiency decreases, and the indoor heat exchanger's condensing temperature may be low. If an excessively high setting is selected, the excessive airflow may result in insufficient hot air temperature. The indoor ambient temperature reflects the indoor heating demand. The greater the difference between the indoor ambient temperature and the target temperature, the more urgent the heating demand, requiring an appropriate increase in the fan speed to accelerate heat transfer. Relying solely on a single temperature parameter to determine the fan speed can easily lead to problems such as "the setting is too high but the hot air temperature is insufficient" or "the setting is too low but the heating demand is urgent." Therefore, it is necessary to combine the outdoor ambient temperature, indoor ambient temperature, and the indoor heat exchanger's condensing temperature to comprehensively assess the matching relationship between the system's heating capacity and indoor demand, and determine the most suitable indoor fan operating setting.

[0102] Specifically, when the indoor fan is turned on according to the start-up conditions, the air conditioner first continuously obtains the current outdoor ambient temperature, indoor ambient temperature, and condensing temperature of the indoor heat exchanger; then it substitutes these three temperature parameters into the preset gear judgment logic (such as through parameter weighting calculation, interval matching, etc.), which will output the corresponding optimal operating gear according to different temperature combinations; finally, the air conditioner controls the indoor fan to operate at the determined operating gear, so as to achieve a precise match between the air volume and the system heating capacity and indoor demand.

[0103] For example, when the outdoor ambient temperature is ≤-10℃ and the condensing temperature is ≤30℃, regardless of the indoor ambient temperature, the low setting should be selected first (to avoid excessive airflow leading to insufficient hot air temperature); when the outdoor ambient temperature is >-10℃ and ≤0℃, and the condensing temperature is >30℃ and ≤38℃, if the indoor ambient temperature is ≤12℃, the medium setting should be selected (urgent demand requires faster heating), and if the indoor ambient temperature is >12℃, the low setting should be selected (moderate demand avoids excessive airflow); when the outdoor ambient temperature is >0℃ and the condensing temperature is >38℃, if the indoor ambient temperature is ≤15℃, the high setting should be selected (strong heating capacity, urgent demand, rapid temperature rise), and if the indoor ambient temperature is >15℃, the medium setting should be selected (reduced demand, balancing efficiency and comfort).

[0104] This invention reduces the number of flow paths by initially closing the first control valve in the heating mode, and controlling the opening and closing of the second control valve based on the outdoor and indoor ambient temperatures. This concentrates the refrigerant in a small number of flow paths, increasing the heat exchange intensity per unit flow path, accelerating the rise of system high pressure, effectively shortening the time to establish the high and low pressure difference, and reducing the waiting time for cold air. The condensing temperature of the indoor heat exchanger is used as the criterion for starting the indoor fan, ensuring that the indoor fan is only activated when the system has established a sufficient high and low pressure difference and the indoor heat exchanger can stably release heat. This fundamentally avoids the problem of direct cold air blowing caused by activating the indoor fan before reaching the desired temperature, improving user comfort. After the indoor fan is activated, the first and second control valves are opened based on the condensing temperature and compressor operating time. Once the system high pressure stabilizes, all flow paths are restored. This ensures rapid initial pressure build-up while avoiding insufficient heating efficiency caused by prolonged operation with small flow paths. Furthermore, the auxiliary judgment based on compressor operating time prevents system abnormalities and improves overall operational stability.

[0105] Since the processing and functions implemented by the device in this embodiment are basically the same as the embodiments, principles and examples of the aforementioned methods, any details not covered in the description of this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0106] The technical solution of this invention includes an indoor heat exchanger and at least two control valves. The indoor heat exchanger includes at least two sets of parallel heat exchange flow paths that can be independently controlled to open and close. The at least two control valves control the total number of parallel heat exchange flow paths of the indoor heat exchanger through a combination of on / off states. Each control valve includes a first control valve and a second control valve. After the air conditioner is turned on in heating mode, the first control valve is closed and the compressor is started. The opening and closing of the second control valve is controlled according to the outdoor and indoor ambient temperatures. The starting conditions for the indoor fan are determined based on the condensing temperature. If the starting conditions are met, the indoor fan is turned on. Subsequently, the first and second control valves are opened according to the condensing temperature and the compressor's operating time. This achieves rapid establishment of the pressure difference when the air conditioner starts heating, improving comfort.

[0107] According to an embodiment of the present invention, an air conditioner corresponding to an air conditioner control device is also provided. This air conditioner may include the air conditioner control device described above.

[0108] Since the processing and functions implemented by the air conditioner in this embodiment are basically the same as the embodiments, principles and examples of the aforementioned device, any details not covered in the description of this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0109] The technical solution of this invention includes an indoor heat exchanger and at least two control valves. The indoor heat exchanger includes at least two sets of parallel heat exchange flow paths that can be independently controlled to open and close. The at least two control valves control the total number of parallel heat exchange flow paths of the indoor heat exchanger through a combination of on / off states. Each control valve includes a first control valve and a second control valve. After the air conditioner is turned on in heating mode, the first control valve is closed and the compressor is started. The opening and closing of the second control valve is controlled according to the outdoor and indoor ambient temperatures. The starting conditions for the indoor fan are determined based on the condensing temperature. If the starting conditions are met, the indoor fan is turned on. Subsequently, the first and second control valves are opened according to the condensing temperature and the compressor's operating time. This achieves rapid establishment of the pressure difference when the air conditioner starts heating, improving comfort.

[0110] According to an embodiment of the present invention, a storage medium corresponding to an air conditioner control method is also provided, the storage medium including a stored program, wherein the program controls the device where the storage medium is located to execute the air conditioner control method described above when it is executed.

[0111] Since the processing and functions implemented by the storage medium in this embodiment are basically the same as the embodiments, principles and examples of the aforementioned methods, any details not covered in this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0112] The technical solution of this invention includes an indoor heat exchanger and at least two control valves. The indoor heat exchanger includes at least two sets of parallel heat exchange flow paths that can be independently controlled to open and close. The at least two control valves control the total number of parallel heat exchange flow paths of the indoor heat exchanger through a combination of on / off states. Each control valve includes a first control valve and a second control valve. After the air conditioner is turned on in heating mode, the first control valve is closed and the compressor is started. The opening and closing of the second control valve is controlled according to the outdoor and indoor ambient temperatures. The starting conditions for the indoor fan are determined based on the condensing temperature. If the starting conditions are met, the indoor fan is turned on. Subsequently, the first and second control valves are opened according to the condensing temperature and the compressor's operating time. This achieves rapid establishment of the pressure difference when the air conditioner starts heating, improving comfort.

[0113] According to an embodiment of the present invention, a computer program product corresponding to the control method for an air conditioner is also provided. The computer program product includes a computer program that, when processed and executed, implements the steps of the control method for the air conditioner described above.

[0114] Since the processing and functions implemented by the computer program product in this embodiment are basically corresponding to the embodiments, principles and examples of the aforementioned methods, any details not covered in the description of this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0115] The technical solution of this invention includes an indoor heat exchanger and at least two control valves. The indoor heat exchanger includes at least two sets of parallel heat exchange flow paths that can be independently controlled to open and close. The at least two control valves control the total number of parallel heat exchange flow paths of the indoor heat exchanger through a combination of on / off states. Each control valve includes a first control valve and a second control valve. After the air conditioner is turned on in heating mode, the first control valve is closed and the compressor is started. The opening and closing of the second control valve is controlled according to the outdoor and indoor ambient temperatures. The starting conditions for the indoor fan are determined based on the condensing temperature. If the starting conditions are met, the indoor fan is turned on. Subsequently, the first and second control valves are opened according to the condensing temperature and the compressor's operating time. This achieves rapid establishment of the pressure difference when the air conditioner starts heating, improving comfort.

[0116] In summary, it is readily understood by those skilled in the art that, without conflict, the aforementioned advantageous methods can be freely combined and superimposed.

[0117] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A control method of an air conditioner, characterized by, The air conditioner comprises a compressor, an indoor heat exchanger, and an indoor fan; the indoor heat exchanger comprises at least two groups of parallel heat exchange flow paths, at least one group of the parallel heat exchange flow paths being independently controllable; the method comprises: After the air conditioner is started in a heating mode and the compressor is started, an outdoor environment temperature, an indoor environment temperature, a condensing temperature of the indoor heat exchanger, and a running time length of the compressor are obtained; According to the outdoor environment temperature, the indoor environment temperature, the condensing temperature, and the running time length, the on-off of the independently controllable parallel heat exchange flow paths is controlled.

2. The control method of the air conditioner according to claim 1, characterized by, The at least two groups of parallel heat exchange flow paths comprise at least two groups of independently controllable parallel heat exchange flow paths; at least two control valves are arranged corresponding to the at least two groups of independently controllable parallel heat exchange flow paths; the at least two control valves are used to control the total number of the on-off of the parallel heat exchange flow paths of the indoor heat exchanger through a combination of on-off states; the at least two control valves comprise a first control valve and a second control valve; The method further comprises: Before the compressor is started, the first control valve is closed; According to the outdoor environment temperature, the indoor environment temperature, the condensing temperature, and the running time length, the on-off of the independently controllable parallel heat exchange flow paths is controlled, which comprises: According to the outdoor environment temperature and the indoor environment temperature, the on-off of the second control valve is controlled; According to the condensing temperature, it is determined whether the start condition of the indoor fan is met; If the start condition of the indoor fan is met, the indoor fan is started, and then the opening of the first control valve and the second control valve is controlled according to the condensing temperature and the running time length of the compressor.

3. The control method of the air conditioner according to claim 2, characterized by, According to the outdoor environment temperature and the indoor environment temperature, the on-off of the second control valve is controlled, which comprises: According to the outdoor environment temperature and the indoor environment temperature, a parameter indicating whether the high-low pressure difference of the air conditioner can quickly reach a required state for heating is calculated; It is determined whether the parameter is greater than or equal to a first preset value; If the parameter is greater than or equal to the first preset value, the second control valve is controlled to be closed; If the parameter is less than the first preset value, the second control valve is controlled to be kept open.

4. The control method of the air conditioner according to claim 2, characterized by, According to the condensing temperature, it is determined whether the start condition of the indoor fan is met, which comprises: It is determined whether the condensing temperature is greater than or equal to a second preset value; If the condensing temperature is greater than or equal to the second preset value, it is determined that the start condition of the indoor fan is met, and a running gear of the indoor fan after the indoor fan is started is fitted based on the outdoor environment temperature, the indoor environment temperature, and the condensing temperature; If the condensing temperature is less than the second preset value, it is determined that the start condition of the indoor fan is not met.

5. The control method of the air conditioner according to claim 2, characterized by, According to the condensing temperature and the running time length of the compressor, the opening of the first control valve and the second control valve is controlled, which comprises: It is determined whether the condensing temperature is greater than or equal to a third preset value, and whether the running time length of the compressor is greater than or equal to a fourth preset value; If the condensing temperature is greater than or equal to the third preset value or the running time of the compressor is greater than or equal to the fourth preset value, the first control valve and the second control valve are opened; If the condensing temperature is less than the third preset value and the running time of the compressor is less than the fourth preset value, the states of the first control valve and the second control valve are kept unchanged, and the condensing temperature and the running time of the compressor are continuously detected until the condensing temperature is greater than or equal to the third preset value or the running time of the compressor is greater than or equal to the fourth preset value, and then the first control valve and the second control valve are opened.

6. The control method of the air conditioner according to claim 2 or 4, characterized by, Further comprising: When the starting condition of the indoor fan is not met, determining the size relationship between the running time of the compressor and a fourth preset value; If the running time of the compressor is greater than or equal to the fourth preset value, a preset formula is optimized based on the outdoor environment temperature and the indoor environment temperature, and then the first control valve and the second control valve are opened, and the indoor fan is controlled to operate according to a set baffle; the preset formula is a formula corresponding to a parameter representing whether the high-low pressure difference of the air conditioner can quickly reach a required state for heating; If the running time of the compressor is less than the fourth preset value, it is determined whether the starting condition of the indoor fan is met according to the condensing temperature.

7. The control method of the air conditioner according to any one of claims 2 to 6, characterized by, The flow area of the heat exchange flow path of the indoor heat exchanger controlled by the first control valve is greater than the flow area of the heat exchange flow path of the indoor heat exchanger controlled by the second control valve.

8. A control device of an air conditioner, characterized by comprising: The air conditioner comprises a compressor, an indoor heat exchanger, and an indoor fan; the indoor heat exchanger comprises at least two groups of parallel heat exchange flow paths, at least one group of the parallel heat exchange flow paths being independently controllable; and the device comprises: An acquisition unit is configured to acquire an outdoor environment temperature, an indoor environment temperature, a condensing temperature of the indoor heat exchanger, and a running time of the compressor after the air conditioner starts a heating mode and starts the compressor; A control unit is configured to control the on-off of the independently controllable parallel heat exchange flow paths according to the outdoor environment temperature, the indoor environment temperature, the condensing temperature, and the running time.

9. An air conditioner characterized by comprising: Comprise: The control device of the air conditioner of claim 8.

10. A storage medium, characterized by The storage medium comprises a stored program, wherein when the program is executed, the device where the storage medium is located performs the control method of the air conditioner of any one of claims 1 to 7.

11. A computer program product comprising a computer program, characterized in that, The computer program is executed by a processor to implement the steps of the control method of the air conditioner of any one of claims 1 to 7.

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