Air conditioner and control method and device thereof, storage medium and computer program product

Abstract

The invention discloses a control method and device of an air conditioner, the air conditioner, a storage medium and a computer program product, a heat dissipation module used for dissipating heat for a control module of a compressor is connected between two throttling components of a system in parallel, and an electromagnetic valve is arranged to control the refrigerant flow on a branch where the heat dissipation module is located; the method comprises the steps that during air conditioner refrigeration, the condensation risk grade of a control module is determined according to the temperature of a heat dissipation module and the outdoor environment temperature; the opening time of the electromagnetic valve is controlled according to the temperature of the control module under the condition of no condensation risk; under the critical condensation risk, the opening time of the electromagnetic valve is controlled according to the temperature change rate of the heat dissipation module, the temperature change rate of the control module and the temperature of the control module; and the electromagnetic valve is closed under the high condensation risk. According to the scheme, under the condition that two-stage throttling is achieved, the refrigerating capacity of the system is improved, and stable operation of the air conditioner is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioners, and in particular relates to a control method and device for an air conditioner, an air conditioner, a storage medium, and a computer program product. Background Art

[0002] In air conditioning systems, the temperature rise of the compressor's control module often limits the air conditioner's ability to operate at high frequencies. To address this issue, refrigerant heat dissipation is often employed. This involves placing a radiator around the control module, with refrigerant pipes flowing through the radiator. This refrigerant's cooling capacity is then used to cool the controller components.

[0003] The radiator is generally located between the throttling device for cooling and the throttling device for heating. In order to avoid using the throttled refrigerant to dissipate heat from the control module, which may cause the control module temperature to be too low and produce condensation water, the throttling device in front of the radiator is always fully open, that is, the refrigerant flows in the following directions: condenser, throttling device without throttling effect (fully open), radiator, throttling device with throttling effect, and evaporator.

[0004] Although the system has two throttling devices, only one is actually throttling, resulting in a waste of resources. In particular, because the system fails to distinguish between favorable and unfavorable control module temperature rises, even when the control module temperature is favorable, the entire refrigerant continues to flow through the radiator for heat dissipation, impacting the air conditioning system's cooling capacity. In high ambient temperatures and unfavorable temperature rises, the high temperature of the unthrottled refrigerant can still cause the compressor control module to overheat, preventing the compressor from maintaining high-frequency operation and impacting cooling capacity.

[0005] The above content is only used to assist in understanding the technical solution of the present invention and does not constitute an admission that the above content is prior art. Summary of the Invention

[0006] The object of the present invention is to provide an air conditioner control method, device, air conditioner, storage medium and computer program product to solve the problem in related solutions that when the temperature of the control module of the air conditioner compressor is good, the full refrigerant heat is dissipated, and when the ambient temperature is high and the temperature rise is severe, the control module temperature is too high, resulting in low cooling capacity of the system. The method achieves this by connecting a heat dissipation module in parallel between two throttling components and controlling the heat dissipation with a solenoid valve. When there is no condensation risk, the heat dissipation is controlled according to the control module temperature to avoid cooling loss. When there is a critical condensation risk, the heat dissipation and anti-condensation are balanced according to the temperature change rate. When the risk is high, the solenoid valve is closed to eliminate safety hazards, thereby improving the cooling capacity of the system and ensuring stable operation.

[0007] The present invention provides a control method for an air conditioner, wherein the air conditioner comprises a first throttling component, a second throttling component, a heat dissipation module, and a compressor; the heat dissipation module is used to dissipate heat for the control module of the compressor; a first branch and a second branch are provided in parallel between the first throttling component and the second throttling component; the heat dissipation module is provided on the first branch, and a solenoid valve is provided at the first end and / or the second end of the heat dissipation module; the heat dissipation amount of the heat dissipation module can be adjusted by controlling the opening time of the solenoid valve; the method comprises: during the cooling operation of the air conditioner, obtaining the temperature of the heat dissipation module, the temperature of the control module, and the outdoor ambient temperature; and adjusting the temperature of the heat dissipation module according to the temperature of the heat dissipation module and the outdoor ambient temperature. The ambient temperature determines the condensation risk level of the control module, and the condensation risk levels include no condensation risk, critical condensation risk, and high condensation risk; when the condensation risk level of the control module is the no condensation risk, the opening time of the solenoid valve is controlled according to the temperature of the control module; when the condensation risk level of the control module is the critical condensation risk, the temperature change rate of the heat dissipation module and the temperature change rate of the control module are calculated, and the opening time of the solenoid valve is controlled according to the temperature change rate of the heat dissipation module, the temperature change rate of the control module, and the temperature of the control module; when the condensation risk level of the control module is the high condensation risk, the solenoid valve is controlled to be closed.

[0008] In some embodiments, the condensation risk level of the control module is determined based on the temperature of the heat dissipation module and the outdoor ambient temperature, including: recording the difference between the temperature of the heat dissipation module and the outdoor ambient temperature as the temperature difference, judging the size relationship between the temperature of the heat dissipation module and the outdoor ambient temperature, and the size of the temperature difference; if the temperature of the heat dissipation module is greater than the outdoor ambient temperature, and the temperature difference is greater than the preset temperature difference, then determining that the condensation risk level of the control module is the no condensation risk; if the temperature of the heat dissipation module is greater than the outdoor ambient temperature, and the temperature difference is less than or equal to the preset temperature difference, then determining that the condensation risk level of the control module is the critical condensation risk; if the temperature of the heat dissipation module is less than or equal to the outdoor ambient temperature, then determining that the condensation risk level of the control module is the high condensation risk.

[0009] In some embodiments, the opening time of the solenoid valve is controlled according to the temperature of the control module, including: judging the temperature of the control module; if the temperature of the control module is lower than a preset first temperature, reducing the opening time of the solenoid valve; if the temperature of the control module is greater than or equal to the preset first temperature and lower than a preset second temperature, calculating the temperature change rate of the control module, and controlling the opening time of the solenoid valve according to the temperature change rate of the control module; if the temperature of the control module is greater than or equal to the preset second temperature, increasing the opening time of the solenoid valve.

[0010] In some embodiments, the opening time of the solenoid valve is controlled according to the temperature change rate of the control module, including: judging the magnitude of the temperature change rate of the control module; if the temperature change rate of the control module is less than a preset temperature change rate, keeping the opening time of the solenoid valve unchanged; if the temperature change rate of the control module is greater than or equal to the preset temperature change rate, increasing the opening time of the solenoid valve.

[0011] In some embodiments, the opening time of the solenoid valve is controlled according to the temperature change rate of the heat dissipation module, the temperature change rate of the control module, and the temperature of the control module, including: determining an opening time adjustment amount corresponding to the temperature change rate of the heat dissipation module and the temperature of the control module from a preset first opening time control table, recorded as a first opening time adjustment amount; determining an opening time adjustment amount corresponding to the temperature change rate of the control module and the temperature of the control module from a preset second opening time control table, recorded as a second opening time adjustment amount; determining the sum of the current opening time of the solenoid valve, the first opening time adjustment amount, and the second opening time adjustment amount as a new opening time; controlling the solenoid valve to operate at the new opening time; wherein, in the preset first opening time control table, the temperature change rate of the heat dissipation module is the horizontal coordinate, and the temperature of the control module is the vertical coordinate; in the preset second opening time control table, the temperature change rate of the control module is the horizontal coordinate, and the temperature of the control module is the vertical coordinate.

[0012] In some embodiments, when the condensation risk level of the control module is the high condensation risk, after controlling the solenoid valve to close, the temperature of the control module is determined; if the temperature of the control module is greater than a second preset temperature, the operating frequency of the compressor is reduced; if the temperature of the control module is less than or equal to the second preset temperature, the operating frequency of the compressor is maintained unchanged.

[0013] Matching the above method, the present invention provides a control device for an air conditioner on the other hand, the air conditioner includes a first throttling component, a second throttling component, a heat dissipation module, and a compressor; the heat dissipation module is used to dissipate heat for the control module of the compressor; a first branch and a second branch are arranged in parallel between the first throttling component and the second throttling component; the heat dissipation module is arranged on the first branch, and the first end and / or the second end of the heat dissipation module are provided with an electromagnetic valve; controlling the opening time of the electromagnetic valve can adjust the heat dissipation of the heat dissipation module; the device includes: an acquisition unit, which is configured to obtain the temperature of the heat dissipation module, the temperature of the control module, and the outdoor ambient temperature during the cooling operation of the air conditioner; a control unit is configured to obtain the temperature of the heat dissipation module, the temperature of the control module, and the outdoor ambient temperature according to the temperature of the heat dissipation module and the outdoor ambient temperature. The condensation risk level of the control module is determined by the temperature, and the condensation risk levels include no condensation risk, critical condensation risk, and high condensation risk; the control unit is further configured to control the opening time of the solenoid valve according to the temperature of the control module when the condensation risk level of the control module is the no condensation risk; the control unit is further configured to calculate the temperature change rate of the heat dissipation module and the temperature change rate of the control module when the condensation risk level of the control module is the critical condensation risk, and control the opening time of the solenoid valve according to the temperature change rate of the heat dissipation module, the temperature change rate of the control module, and the temperature of the control module; the control unit is further configured to control the solenoid valve to be closed when the condensation risk level of the control module is the high condensation risk.

[0014] In some embodiments, the control unit determines the condensation risk level of the control module based on the temperature of the heat dissipation module and the outdoor ambient temperature, including: recording the difference between the temperature of the heat dissipation module and the outdoor ambient temperature as the temperature difference, and judging the relationship between the temperature of the heat dissipation module and the outdoor ambient temperature and the size of the temperature difference; if the temperature of the heat dissipation module is greater than the outdoor ambient temperature, and the temperature difference is greater than the preset temperature difference, then determining that the condensation risk level of the control module is the no condensation risk; if the temperature of the heat dissipation module is greater than the outdoor ambient temperature, and the temperature difference is less than or equal to the preset temperature difference, then determining that the condensation risk level of the control module is the critical condensation risk; if the temperature of the heat dissipation module is less than or equal to the outdoor ambient temperature, then determining that the condensation risk level of the control module is the high condensation risk.

[0015] In some embodiments, the control unit controls the opening time of the solenoid valve according to the temperature of the control module, including: judging the temperature of the control module; if the temperature of the control module is lower than a preset first temperature, reducing the opening time of the solenoid valve; if the temperature of the control module is greater than or equal to the preset first temperature and lower than a preset second temperature, calculating the temperature change rate of the control module, and controlling the opening time of the solenoid valve according to the temperature change rate of the control module; if the temperature of the control module is greater than or equal to the preset second temperature, increasing the opening time of the solenoid valve.

[0016] In some embodiments, the control unit controls the opening time of the solenoid valve according to the temperature change rate of the control module, including: judging the magnitude of the temperature change rate of the control module; if the temperature change rate of the control module is less than a preset temperature change rate, keeping the opening time of the solenoid valve unchanged; if the temperature change rate of the control module is greater than or equal to the preset temperature change rate, increasing the opening time of the solenoid valve.

[0017] In some embodiments, the control unit controls the opening time of the solenoid valve according to the temperature change rate of the heat dissipation module, the temperature change rate of the control module, and the temperature of the control module, including: determining an opening time adjustment amount corresponding to the temperature change rate of the heat dissipation module and the temperature of the control module from a preset first opening time control table, recorded as a first opening time adjustment amount; determining an opening time adjustment amount corresponding to the temperature change rate of the control module and the temperature of the control module from a preset second opening time control table, recorded as a second opening time adjustment amount; determining the sum of the current opening time of the solenoid valve, the first opening time adjustment amount, and the second opening time adjustment amount as a new opening time; controlling the solenoid valve to operate at the new opening time; wherein, in the preset first opening time control table, the temperature change rate of the heat dissipation module is the horizontal coordinate, and the temperature of the control module is the vertical coordinate; in the preset second opening time control table, the temperature change rate of the control module is the horizontal coordinate, and the temperature of the control module is the vertical coordinate.

[0018] In some embodiments, the control unit is further configured to, when the condensation risk level of the control module is the high condensation risk, control the solenoid valve to close, and then determine the temperature of the control module; if the temperature of the control module is greater than a second preset temperature, reduce the operating frequency of the compressor; if the temperature of the control module is less than or equal to the second preset temperature, maintain the operating frequency of the compressor unchanged.

[0019] Matching the above device, the present invention further provides an air conditioner, comprising: the control device of the air conditioner described above.

[0020] In accordance with the above method, the present invention further provides a storage medium, which includes a stored program, wherein when the program is running, the device where the storage medium is located is controlled to execute the above-mentioned air conditioning control method.

[0021] In accordance with the above method, the present invention further provides a computer program product, which includes a computer program. When the computer program product is processed and executed, the steps of the above air conditioner control method are implemented.

[0022] The present invention connects a heat dissipation module for dissipating heat from a control module in parallel between two throttling components of the system, and provides a solenoid valve to control the refrigerant flow rate on the branch line containing the heat dissipation module. During air conditioning, the condensation risk level of the control module is determined based on the temperature of the heat dissipation module and the outdoor ambient temperature. When there is no condensation risk, the solenoid valve's opening time is controlled based on the temperature of the control module. When there is a critical condensation risk, the solenoid valve's opening time is controlled based on the temperature change rate of the heat dissipation module, the temperature change rate of the control module, and the temperature of the control module. The solenoid valve is closed when there is a high condensation risk. Thus, by implementing dual-stage throttling, heat dissipation is controlled based on the temperature of the control module when there is no condensation risk to avoid cooling loss. When there is a critical condensation risk, heat dissipation and condensation prevention are balanced based on the temperature change rate. When there is a high condensation risk, the solenoid valve is closed to eliminate safety hazards, thereby improving the system's cooling capacity and ensuring stable operation.

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

[0024] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A flow chart of an embodiment of a method for controlling an air conditioner according to the present invention;

[0026] Figure 2 A schematic structural diagram of an embodiment of an air conditioner control device of the present invention;

[0027] Figure 3 This is the system structure diagram of the air conditioner;

[0028] Figure 4 FIG. 4 is a flow chart of another embodiment of the air conditioner control method of the present invention.

[0029] In conjunction with the accompanying drawings, the reference numerals in the embodiments of the present invention are as follows:

[0030] 1- compressor; 2- four-way valve; 3- outdoor heat exchanger; 4- first throttling component; 5- second throttling component; 6- indoor heat exchanger; 7- first solenoid valve; 8- second solenoid valve; 9- heat dissipation module; 102- acquisition unit; 104- control unit. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] According to an embodiment of the present invention, a control method for an air conditioner is provided, wherein the air conditioner includes a first throttle component, a second throttle component, a heat dissipation module, and a compressor; the heat dissipation module is used to dissipate heat for a control module of the compressor; a first branch and a second branch are arranged in parallel between the first throttle component and the second throttle component; the heat dissipation module is arranged on the first branch, and an electromagnetic valve is arranged on the first end and / or the second end of the heat dissipation module; the second branch is a component-free pipeline.

[0033] The system structure of air conditioning is as follows Figure 3 As shown, the system includes a compressor 1, a four-way valve 2, an outdoor heat exchanger 3, a first throttle component 4, a second throttle component 5, an indoor heat exchanger 6, and a heat dissipation module 9. The first throttle component 4 and the second throttle component 5 are arranged between the outdoor heat exchanger 3 and the indoor heat exchanger 6. A first branch and a second branch are provided between the first throttle component 4 and the second throttle component 5. The heat dissipation module 9 is provided on the first branch, and no components are provided on the second branch. A first solenoid valve 7 is provided at one end of the heat dissipation module 9, and a second solenoid valve 8 is provided at the other end. Alternatively, only the first solenoid valve 7 or the second solenoid valve 8 may be provided. If both the first solenoid valve 7 and the second solenoid valve 8 are provided, the first solenoid valve 7 and the second solenoid valve 8 are controlled synchronously.

[0034] During cooling operation, the refrigerant discharged from compressor 1 passes through four-way valve 2, outdoor heat exchanger 3, and first throttling component 4. If first solenoid valve 7 and second solenoid valve 8 are open, the refrigerant flows through the first and second branches, respectively, to second throttling component 5. The refrigerant in the first branch passes through heat dissipation module 9, dissipating heat from the control module. If first solenoid valve 7 and second solenoid valve 8 are closed, the refrigerant flows only through the second branch to second throttling component 5. Both first and second throttling components 4 and 5 have a throttling effect, and their openings are adjusted according to normal target exhaust requirements. This means that the cooler refrigerant after throttling by first throttling component 4 is used to dissipate heat from the control module, improving the control module's heat dissipation in high-temperature environments.

[0035] Controlling the solenoid valve's on-off time can adjust the heat dissipation of the heat dissipation module. Specifically, the solenoid valve is controlled using a fixed on-off cycle, t, where t = on-time ton + off-time toff. During each cycle, the solenoid valve is first opened for ton and then closed for toff. By varying the solenoid valve's on-off time, the amount of refrigerant flowing through the heat dissipation module during a cycle is altered, regulating the heat dissipation of the module and keeping the control module's temperature within an appropriate range.

[0036] like Figure 1 FIG. 1 is a flow chart of an embodiment of the method of the present invention. The air conditioner control method may include steps S110 to S150.

[0037] In step S110 , during the cooling operation of the air conditioner, both the first throttling component and the second throttling component throttle the refrigerant to obtain the temperature of the heat dissipation module, the temperature of the control module, and the outdoor ambient temperature.

[0038] The heat dissipation module temperature is the surface temperature of the heat pipes within the module. Since the control module uses a cooler refrigerant after throttling, condensation may form on the control module surface, potentially causing electrical safety issues. Therefore, by collecting real-time data on the heat dissipation module temperature, the control module temperature, and the outdoor ambient temperature, we control the heat dissipation of the module to prevent condensation.

[0039] In step S120 , the condensation risk level of the control module is determined according to the temperature of the heat dissipation module and the outdoor ambient temperature. The condensation risk level includes no condensation risk, critical condensation risk, and high condensation risk.

[0040] Different control strategies are implemented according to different condensation risk levels to make control more precise. While avoiding condensation, the temperature of the control module is always ensured to be within the appropriate range, thereby improving the cooling capacity of the system.

[0041] In some embodiments, in step S120, the specific process of determining the condensation risk level of the control module based on the temperature of the heat dissipation module and the outdoor ambient temperature includes: recording the difference between the temperature of the heat dissipation module and the outdoor ambient temperature as the temperature difference, and judging the size relationship between the temperature of the heat dissipation module and the outdoor ambient temperature and the size of the temperature difference; if the temperature of the heat dissipation module is greater than the outdoor ambient temperature, and the temperature difference is greater than the preset temperature difference, then determining that the condensation risk level of the control module is the no condensation risk; if the temperature of the heat dissipation module is greater than the outdoor ambient temperature, and the temperature difference is less than or equal to the preset temperature difference, then determining that the condensation risk level of the control module is the critical condensation risk; if the temperature of the heat dissipation module is less than or equal to the outdoor ambient temperature, then determining that the condensation risk level of the control module is the high condensation risk.

[0042] Set the heat dissipation module temperature T 管 and outdoor ambient temperature T 外 The difference is recorded as the temperature difference ΔT, which can be used to quantitatively determine whether the temperature of the heat dissipation module is lower than the dew point.

[0043] If T 管 >T 外 And ΔT>preset temperature difference ΔT 预 , indicating that there are no conditions for condensation to form on the surface of the heat dissipation module. It is considered that there is no condensation risk, and the system can shift the control focus to the temperature regulation of the control module.

[0044] If T 管 >T 外 And ΔT≤ΔT 预 , indicating that the temperature of the heat dissipation module is close to the dew point temperature, which may be caused by fluctuations in working conditions. 管 If it further drops to the condensation range, it is a critical condensation risk. At this time, it is necessary to monitor T 管 and control module temperature T 模 changes to prevent cooling capacity attenuation during high-temperature cooling or excessive cooling capacity loss during low-temperature cooling.

[0045] If T 管 ≤T 外 , indicating that the surface temperature of the heat dissipation module must be lower than or close to the dew point temperature, resulting in condensation, which may cause electrical safety hazards such as the controller motherboard. This is a high condensation risk. At this time, it is necessary to reduce the solenoid valve opening time ton, or even keep the solenoid valve closed for a period of time to increase the pipe temperature and avoid condensation.

[0046] In step S130 , when the condensation risk level of the control module is the no condensation risk, the opening time of the solenoid valve is controlled according to the temperature of the control module.

[0047] In some embodiments, in step S130 , the specific process of controlling the opening time of the solenoid valve according to the temperature of the control module includes: steps S210 to S240 .

[0048] Step S210: determining the temperature of the control module.

[0049] Step S220: If the temperature of the control module is lower than a preset first temperature, reducing the opening time of the solenoid valve.

[0050] Step S230 : If the temperature of the control module is greater than or equal to a preset first temperature and less than a preset second temperature, the temperature change rate of the control module is calculated, and the opening time of the solenoid valve is controlled according to the temperature change rate of the control module.

[0051] Step S240: If the temperature of the control module is greater than or equal to a preset second temperature, increase the opening time of the solenoid valve.

[0052] Control module temperature T 模 Directly reflects its heat dissipation needs. When there is no condensation risk, according to T 模 The interval division determines the different heat dissipation requirements and then controls the solenoid valve. Specifically, if T 模 < the preset first temperature T1, indicating that the module has good heat dissipation. At this time, the solenoid valve opening time ton is reduced, the refrigerant flow is reduced, and the cooling capacity of the refrigeration system is reserved for indoor cooling, thereby improving the air conditioning cooling efficiency and reducing energy consumption. If T1≤T 模 <Preset second temperature T2, at this time, although the module temperature has not reached the dangerous threshold, in order to avoid untimely heat dissipation caused by the lag in static temperature judgment, it is necessary to maintain the module temperature stable according to the temperature change trend of the control module to prevent the compressor from limiting frequency due to temperature fluctuations; if T 模 ≥T2, indicating that the module temperature is too high, which may cause the compressor to operate at a limited frequency and affect the cooling capacity. In this case, increase the solenoid valve opening time ton to increase the refrigerant heat dissipation, enhance heat dissipation, ensure high-frequency operation of the compressor, avoid cooling capacity attenuation, and maintain efficient operation of the air conditioning system.

[0053] By judging the temperature of the control module and adjusting the opening time of the solenoid valve in different intervals, the cooling loss can be reduced when the module temperature is low. When the temperature is in the middle range, dynamic control is performed based on the change rate to maintain stability. When the temperature is too high, heat dissipation is enhanced, thereby avoiding cooling waste while ensuring high-frequency operation of the compressor, improving the cooling efficiency and stability of the air conditioner.

[0054] In some embodiments, in step S230, the specific process of controlling the opening time of the solenoid valve according to the temperature change rate of the control module includes: judging the magnitude of the temperature change rate of the control module; if the temperature change rate of the control module is less than the preset temperature change rate, keeping the opening time of the solenoid valve unchanged; if the temperature change rate of the control module is greater than or equal to the preset temperature change rate, increasing the opening time of the solenoid valve.

[0055] Control module temperature change rate V 模 Reflects the dynamic change trend of module temperature and can more accurately predict the module heat dissipation demand compared to static temperature values. Specifically, when V 模 When the temperature change rate is less than the preset value V, it means that the module temperature rises slowly or may even be in a downward trend. At this time, the heat dissipation capacity is sufficient to maintain the module temperature stable, and there is no need to adjust the opening time of the solenoid valve. If V 模 ≥V, indicating that the module temperature is rising rapidly. If heat dissipation is not strengthened in time, the module temperature may exceed the threshold. In this case, increase the opening time of the solenoid valve, increase the refrigerant flow, and strengthen heat dissipation to ensure the air conditioner's high-frequency operation capability under high-temperature conditions, maintain stable cooling capacity, and avoid cooling efficiency degradation.

[0056] By judging the temperature change rate of the control module and comparing it with the preset value to adjust the opening time of the solenoid valve, it is possible to avoid refrigerant flow waste when the module temperature changes slowly, and to promptly enhance heat dissipation when the temperature rises rapidly, thereby dynamically balancing the utilization of cooling capacity and heat dissipation demand, preventing the compressor from limiting frequency due to overheating, and improving the stability and cooling efficiency of the air-conditioning system.

[0057] At step S140, when the condensation risk level of the control module is the critical condensation risk, the temperature change rate of the heat dissipation module and the temperature change rate of the control module are calculated. A temperature change rate less than 0 indicates that the module temperature decreases, and a temperature change rate greater than 0 indicates that the module temperature increases. The opening time of the solenoid valve is controlled according to the temperature change rate of the heat dissipation module, the temperature change rate of the control module, and the temperature of the control module.

[0058] In some embodiments, in step S140, the specific process of controlling the opening time of the solenoid valve according to the temperature change rate of the heat dissipation module, the temperature change rate of the control module, and the temperature of the control module includes: determining the opening time adjustment amount corresponding to the temperature change rate of the heat dissipation module and the temperature of the control module from a preset first opening time control table, recorded as the first opening time adjustment amount; determining the opening time adjustment amount corresponding to the temperature change rate of the control module and the temperature of the control module from a preset second opening time control table, recorded as the second opening time adjustment amount; and setting the current opening time of the solenoid valve and the first opening time adjustment amount. The sum of the first opening time adjustment amount and the second opening time adjustment amount is determined as the new opening time; the solenoid valve is controlled to operate at the new opening time; wherein, in the preset first opening time control table, the temperature change rate of the heat dissipation module is the horizontal coordinate, and the temperature of the control module is the vertical coordinate, that is, the greater the temperature change rate of the heat dissipation module, the greater the opening time adjustment amount, and the greater the temperature of the control module, the greater the opening time adjustment amount; in the preset second opening time control table, the temperature change rate of the control module is the horizontal coordinate, and the temperature of the control module is the vertical coordinate, that is, the greater the temperature change rate of the control module, the greater the opening time adjustment amount, and the greater the temperature of the control module, the greater the opening time adjustment amount.

[0059] The first opening time control table is preset to use the temperature change rate V of the heat dissipation module 管 The horizontal axis is the control module temperature T 模 The vertical axis is used to determine the temperature change trend of the heat dissipation module and the current control module temperature to determine the adjustment direction of the solenoid valve opening time. 管 is negative (heat dissipation module temperature drops) and T 模 When the condensation critical value is approaching, the opening time ton needs to be reduced to increase the pipe temperature and avoid condensation. In some embodiments, the preset first opening time control table is:

[0060]

[0061]

[0062] In the above preset first opening time control table, V 管 The larger the value, the larger the corresponding opening time adjustment amount. 模 The larger the value, the larger the corresponding opening time adjustment amount. For example, in T 模 <T 模预设1 In this case, △t A11 <△t A12 <△t A13 ; In V 管 <V 管预设1 In this case, △t A11 <△t A21<△t A31 . T 模预设1 、T 模预设 2. V 管预设1 、V 管预设2 Used to divide different ranges, and specific values can be set according to specific circumstances.

[0063] Preset the second opening time control table to control the module temperature change V 模 is the horizontal axis, T 模 is the vertical axis, passing through V 模 Determine the module heating rate. If V 模 Greater than the preset value and T 模 If the temperature is too high, the opening time ton needs to be increased to enhance heat dissipation and prevent the compressor from limiting frequency due to overheating. In some embodiments, the preset second opening time control table is:

[0064] <![CDATA[V 模 <In 模预设1 ]]> <![CDATA[V 模预设1 ≤V 模 <In 模预设2 ]]> <![CDATA[V 模 ≥V 模预设2 ]]> <![CDATA[T 模 <T 模预设1 ]]> <![CDATA[△t B11 ]]> <![CDATA[△t B12 ]]> <![CDATA[△t B13 <!-- 7 -->]]> <![CDATA[T 模预设1 ≤T 模 <T 模预设2 ]]> <![CDATA[△t B21 ]]> <![CDATA[△t B22 ]]> <![CDATA[△t B23 ]]> <![CDATA[T 模 ≥T 模预设2 ]]> <![CDATA[△t B31 ]]> <![CDATA[△t B32 ]]> <![CDATA[△t B33 ]]>

[0065] In the above preset second opening time control table, V 模 The larger the value, the larger the corresponding opening time adjustment amount. 模 The larger the value, the larger the corresponding opening time adjustment amount. For example, in T 模 <T 模预设1 In this case, △t B11 <△t B12 <△t B13 ; In V 模 <V 模预设1 In this case, △t B11 <△t B21 <△t B31 . T 模预设1 、T 模预设 2. V 模预设1 、V 模预设2 Used to divide different ranges, and specific values can be set according to specific circumstances.

[0066] The first opening time adjustment amount Δt is determined according to the preset first opening time control table and the preset second opening time control table. Aij and the second opening time adjustment value △t Bij Then calculate the new opening time ton_new = current opening time ton + △t Aij +△t Bij Among them, △t Aij ,△t Bij It can be greater than or less than 0. If ton_new exceeds the solenoid valve switching cycle t, then ton_new = t; if ton_new < 0, then ton_new = 0. When the solenoid valve opening time is 0, it means that the solenoid valve is closed during the current switching cycle.

[0067] A preset first opening time control table specifically regulates the heat dissipation module's temperature to prevent it from entering the condensation zone due to continuous cooling caused by excessive refrigerant flow, while also preventing insufficient heat dissipation from the control module due to excessive heat dissipation module temperatures. A preset second opening time control table responds to the control module's cooling requirements. Within the critical condensation risk range, this ensures stable heat pipe temperatures while preventing abnormal module temperature increases, maintaining the compressor's high-frequency operating capacity. By adjusting the solenoid valve opening time based on the temperature change rates of the heat dissipation and control modules, a precise balance between anti-condensation requirements and module heat dissipation efficiency is achieved within the critical condensation risk range. This prevents condensation risks caused by continuously decreasing heat pipe temperatures while dynamically adjusting heat dissipation based on module temperature trends to prevent compressor frequency limiting due to overheating.

[0068] At step S150 , when the condensation risk level of the control module is the high condensation risk, the solenoid valve is controlled to close so that no refrigerant flows through the heat dissipation module, and the control module starts to heat up to avoid condensation.

[0069] By connecting the heat dissipation module in parallel between two throttling components and using the solenoid valve to control the heat dissipation of the heat dissipation module, while achieving double-stage throttling, it can not only accurately dissipate heat according to the module temperature when there is no condensation risk to avoid cooling loss and ensure high-frequency operation of the compressor, but also dynamically balance the heat dissipation and anti-condensation requirements through the temperature change rate when there is a critical risk, and can also close the solenoid valve when the risk is high to eliminate electrical hazards, thereby improving the refrigeration capacity and ensuring the safe operation of the air conditioner.

[0070] In some embodiments, the process of controlling the operating frequency of the compressor after closing the solenoid valve is further included, and the process specifically includes: when the condensation risk level of the control module is the high condensation risk, after controlling the solenoid valve to close, judging the temperature of the control module; if the temperature of the control module is greater than a second preset temperature, reducing the operating frequency of the compressor; if the temperature of the control module is less than or equal to the second preset temperature, maintaining the operating frequency of the compressor unchanged.

[0071] When the solenoid valve is closed under high condensation risk, the heat dissipation module temperature may be low but the control module temperature may be high. Therefore, in order to prevent the control module from overheating, it is necessary to adjust the heat generation of the control module by controlling the operating frequency of the compressor. Specifically, if T 模 >T2, indicating that the control module is not cooling enough. The higher the compressor operating frequency, the more heat the control module generates. Therefore, the compressor operating frequency is reduced to reduce heat generation and maintain system stability. If T 模 ≤T2, indicating that the control module can maintain a stable temperature through natural heat dissipation from the environment, without adjusting the compressor frequency, ensuring that the cooling capacity is not affected.

[0072] By controlling the compressor frequency after closing the solenoid valve, the control module is prevented from overheating, thus improving system reliability.

[0073] Figure 4 FIG. 1 is a flow chart of another embodiment of the air conditioner control method of the present invention. Figure 4 As shown, the method includes:

[0074] Step 1: Get the pipe temperature T of the heat dissipation module 管 , compressor control module temperature T 模 , outdoor ambient temperature T 外 , calculate the pipe temperature change rate V of the heat dissipation module 管 , the temperature change rate of the control module V 模 .

[0075] Step 2: Determine T 管 With T 外 If T 管 >T 外 +△T 管外 Then go to step 3. If T 外 <T 管 ≤T 环 +△T 管外 Then go to step 4. If T 管 ≤T 外 Then go to step 5. △T 管外 It is the preset difference between the heat dissipation module temperature and the outdoor ambient temperature.

[0076] Step 3: Determine T 模 If T 模 <T 模预设1 , it is assumed that the module has good heat dissipation. To avoid the loss of air conditioning cooling capacity, the solenoid valve opening time ton is reduced. If T 模预设1 ≤T 模 <T 模预设2 , it is assumed that the heat dissipation of the module is normal. At this time, when V 模 <V 模预设1 When V 模 ≥V 模预设 1, it means the module heats up quickly, and the solenoid valve opening time ton is increased. 模 >T 模预设2 , it is believed that the heat dissipation of the module is poor, and the opening time of the solenoid valve is increased by ton to increase the heat dissipation of the refrigerant.

[0077] Step 4: From the preset opening time control table, according to T 模 、V 管 、V 模 Determine the corresponding opening time adjustment value △t Aij and △t Bij, solenoid valve opening time ton = last solenoid valve opening time + △t Aij +△t Bij If the calculated opening time ton is greater than the solenoid valve switching period t, then ton = t; if the calculated opening time ton is less than 0, then ton = 0.

[0078] Step 5: The solenoid valve opening time is reduced to 0, that is, the solenoid valve is closed. 模 >T 模预设2 When the module is considered too high, the compressor frequency limit reduction logic is entered to reduce the heat dissipation of the module.

[0079] Using the technical solution of this embodiment, a heat dissipation module for dissipating heat from the control module is connected in parallel between the system's two throttling components, and a solenoid valve is provided to control the refrigerant flow rate on the branch line containing the heat dissipation module. During air conditioning, the condensation risk level of the control module is determined based on the temperature of the heat dissipation module and the outdoor ambient temperature. When there is no condensation risk, the solenoid valve's opening time is controlled based on the temperature of the control module. When there is a critical condensation risk, the solenoid valve's opening time is controlled based on the temperature change rate of the heat dissipation module, the temperature change rate of the control module, and the temperature of the control module. The solenoid valve is closed when there is a high condensation risk. Thus, by implementing two-stage throttling, heat dissipation is controlled based on the temperature of the control module when there is no condensation risk to avoid cooling loss. When there is a critical condensation risk, heat dissipation and condensation prevention are balanced based on the temperature change rate. When there is a high condensation risk, the solenoid valve is closed to eliminate safety hazards, thereby improving the system's cooling capacity and ensuring stable operation.

[0080] According to an embodiment of the present invention, an air conditioner control device corresponding to the air conditioner control method is also provided. The air conditioner includes a first throttle component, a second throttle component, a heat dissipation module, and a compressor; the heat dissipation module is used to dissipate heat from the compressor control module; a first branch and a second branch are provided in parallel between the first throttle component and the second throttle component; the heat dissipation module is provided on the first branch, and a solenoid valve is provided on the first and / or second ends of the heat dissipation module; the second branch is a component-free pipeline.

[0081] The system structure of air conditioning is as follows Figure 3As shown, the system includes a compressor 1, a four-way valve 2, an outdoor heat exchanger 3, a first throttle component 4, a second throttle component 5, an indoor heat exchanger 6, and a heat dissipation module 9. The first throttle component 4 and the second throttle component 5 are arranged between the outdoor heat exchanger 3 and the indoor heat exchanger 6. A first branch and a second branch are provided between the first throttle component 4 and the second throttle component 5. The heat dissipation module 9 is provided on the first branch, and no components are provided on the second branch. A first solenoid valve 7 is provided at one end of the heat dissipation module 9, and a second solenoid valve 8 is provided at the other end. Alternatively, only the first solenoid valve 7 or the second solenoid valve 8 may be provided. If both the first solenoid valve 7 and the second solenoid valve 8 are provided, the first solenoid valve 7 and the second solenoid valve 8 are controlled synchronously.

[0082] During cooling operation, the refrigerant discharged from compressor 1 passes through four-way valve 2, outdoor heat exchanger 3, and first throttling component 4. If first solenoid valve 7 and second solenoid valve 8 are open, the refrigerant flows through the first and second branches, respectively, to second throttling component 5. The refrigerant in the first branch passes through heat dissipation module 9, dissipating heat from the control module. If first solenoid valve 7 and second solenoid valve 8 are closed, the refrigerant flows only through the second branch to second throttling component 5. Both first and second throttling components 4 and 5 have a throttling effect, and their openings are adjusted according to normal target exhaust requirements. This means that the cooler refrigerant after throttling by first throttling component 4 is used to dissipate heat from the control module, improving the control module's heat dissipation in high-temperature environments.

[0083] Controlling the solenoid valve's on-off time can adjust the heat dissipation of the heat dissipation module. Specifically, the solenoid valve is controlled using a fixed on-off cycle, t, where t = on-time ton + off-time toff. During each cycle, the solenoid valve is first opened for ton and then closed for toff. By varying the solenoid valve's on-off time, the amount of refrigerant flowing through the heat dissipation module during a cycle is altered, regulating the heat dissipation of the module and keeping the control module's temperature within an appropriate range.

[0084] See also Figure 2 FIG2 is a schematic structural diagram of an embodiment of the device of the present invention. The air conditioner control device may include: an acquisition unit 102 and a control unit 104.

[0085] Acquisition unit 102 is configured to, during cooling operation of the air conditioner, throttle the refrigerant using both the first throttling component and the second throttling component, to acquire the temperature of the heat dissipation module, the temperature of the control module, and the outdoor ambient temperature. The specific functions and processing of acquisition unit 102 are described in step S110.

[0086] The heat dissipation module temperature is the surface temperature of the heat pipes within the module. Since the control module uses a cooler refrigerant after throttling, condensation may form on the control module surface, potentially causing electrical safety issues. Therefore, by collecting real-time data on the heat dissipation module temperature, the control module temperature, and the outdoor ambient temperature, we control the heat dissipation of the module to prevent condensation.

[0087] The control unit 104 is configured to determine the condensation risk level of the control module based on the temperature of the heat dissipation module and the outdoor ambient temperature. The condensation risk level includes no condensation risk, critical condensation risk, and high condensation risk. The specific functions and processing of the control unit 104 are shown in step S120.

[0088] Different control strategies are implemented according to different condensation risk levels to make control more precise. While avoiding condensation, the temperature of the control module is always ensured to be within the appropriate range, thereby improving the cooling capacity of the system.

[0089] In some embodiments, the control unit 104 determines the specific process of the condensation risk level of the control module based on the temperature of the heat dissipation module and the outdoor ambient temperature, including: recording the difference between the temperature of the heat dissipation module and the outdoor ambient temperature as the temperature difference, judging the size relationship between the temperature of the heat dissipation module and the outdoor ambient temperature, and the size of the temperature difference; if the temperature of the heat dissipation module is greater than the outdoor ambient temperature, and the temperature difference is greater than the preset temperature difference, then determining that the condensation risk level of the control module is the no condensation risk; if the temperature of the heat dissipation module is greater than the outdoor ambient temperature, and the temperature difference is less than or equal to the preset temperature difference, then determining that the condensation risk level of the control module is the critical condensation risk; if the temperature of the heat dissipation module is less than or equal to the outdoor ambient temperature, then determining that the condensation risk level of the control module is the high condensation risk.

[0090] Set the heat dissipation module temperature T 管 and outdoor ambient temperature T 外 The difference is recorded as the temperature difference ΔT, which can be used to quantitatively determine whether the temperature of the heat dissipation module is lower than the dew point.

[0091] If T 管 >T 外 And ΔT>preset temperature difference ΔT 预 , indicating that there are no conditions for condensation to form on the surface of the heat dissipation module. It is considered that there is no condensation risk, and the system can shift the control focus to the temperature regulation of the control module.

[0092] If T 管 >T 外 And ΔT≤ΔT 预, indicating that the temperature of the heat dissipation module is close to the dew point temperature. The T-tube may drop further to the condensation range due to fluctuations in working conditions, which is a critical condensation risk. At this time, it is necessary to monitor T 管 and control module temperature T 模 changes to prevent cooling capacity attenuation during high-temperature cooling or excessive cooling capacity loss during low-temperature cooling.

[0093] If T 管 ≤T 外 , indicating that the surface temperature of the heat dissipation module must be lower than or close to the dew point temperature, resulting in condensation, which may cause electrical safety hazards such as the controller motherboard. This is a high condensation risk. At this time, it is necessary to reduce the solenoid valve opening time ton, or even keep the solenoid valve closed for a period of time to increase the pipe temperature and avoid condensation.

[0094] The control unit 104 is further configured to control the opening time of the solenoid valve according to the temperature of the control module when the condensation risk level of the control module is the no condensation risk. Specific functions and processing of the control unit 104 are shown in step S130.

[0095] In some embodiments, the control unit 104 controls the opening time of the solenoid valve according to the temperature of the control module, including:

[0096] The control unit 104 is further configured to determine the temperature of the control module.

[0097] The control unit 104 is further configured to reduce the opening time of the solenoid valve if the temperature of the control module is lower than a preset first temperature.

[0098] The control unit 104 is further configured to calculate the temperature change rate of the control module if the temperature of the control module is greater than or equal to a preset first temperature and less than a preset second temperature, and control the opening time of the solenoid valve according to the temperature change rate of the control module.

[0099] The control unit 104 is further configured to increase the opening time of the solenoid valve if the temperature of the control module is greater than or equal to a preset second temperature.

[0100] Control module temperature T 模 Directly reflects its heat dissipation needs. When there is no condensation risk, according to T 模 The interval division determines the different heat dissipation requirements and then controls the solenoid valve. Specifically, if T 模 < the preset first temperature T1, indicating that the module has good heat dissipation. At this time, the solenoid valve opening time ton is reduced, the refrigerant flow is reduced, and the cooling capacity of the refrigeration system is reserved for indoor cooling, thereby improving the air conditioning cooling efficiency and reducing energy consumption. If T1≤T 模<Preset second temperature T2, at this time, although the module temperature has not reached the dangerous threshold, in order to avoid untimely heat dissipation caused by the lag in static temperature judgment, it is necessary to maintain the module temperature stable according to the temperature change trend of the control module to prevent the compressor from limiting frequency due to temperature fluctuations; if T 模 ≥T2, indicating that the module temperature is too high, which may cause the compressor to operate at a limited frequency and affect the cooling capacity. In this case, increase the solenoid valve opening time ton to increase the refrigerant heat dissipation, enhance heat dissipation, ensure high-frequency operation of the compressor, avoid cooling capacity attenuation, and maintain efficient operation of the air conditioning system.

[0101] By judging the temperature of the control module and adjusting the opening time of the solenoid valve in different intervals, the cooling loss can be reduced when the module temperature is low. When the temperature is in the middle range, dynamic control is performed based on the change rate to maintain stability. When the temperature is too high, heat dissipation is enhanced, thereby avoiding cooling waste while ensuring high-frequency operation of the compressor, improving the cooling efficiency and stability of the air conditioner.

[0102] In some embodiments, the control unit 104 controls the opening time of the solenoid valve according to the temperature change rate of the control module, including: judging the magnitude of the temperature change rate of the control module; if the temperature change rate of the control module is less than the preset temperature change rate, keeping the opening time of the solenoid valve unchanged; if the temperature change rate of the control module is greater than or equal to the preset temperature change rate, increasing the opening time of the solenoid valve.

[0103] Control module temperature change rate V 模 Reflects the dynamic change trend of module temperature and can more accurately predict the module heat dissipation demand compared to static temperature values. Specifically, when V 模 When the temperature change rate is less than the preset value V, it means that the module temperature rises slowly or may even be in a downward trend. At this time, the heat dissipation capacity is sufficient to maintain the module temperature stable, and there is no need to adjust the opening time of the solenoid valve. If V 模 ≥V, indicating that the module temperature is rising rapidly. If heat dissipation is not strengthened in time, the module temperature may exceed the threshold. In this case, increase the opening time of the solenoid valve, increase the refrigerant flow, and strengthen heat dissipation to ensure the air conditioner's high-frequency operation capability under high-temperature conditions, maintain stable cooling capacity, and avoid cooling efficiency degradation.

[0104] By judging the temperature change rate of the control module and comparing it with the preset value to adjust the opening time of the solenoid valve, it is possible to avoid refrigerant flow waste when the module temperature changes slowly, and to promptly enhance heat dissipation when the temperature rises rapidly, thereby dynamically balancing the utilization of cooling capacity and heat dissipation demand, preventing the compressor from limiting frequency due to overheating, and improving the stability and cooling efficiency of the air-conditioning system.

[0105] The control unit 104 is further configured to, when the condensation risk level of the control module is the critical condensation risk, calculate the temperature change rate of the heat dissipation module and the temperature change rate of the control module. A temperature change rate less than 0 indicates a decrease in module temperature, and a temperature change rate greater than 0 indicates an increase in module temperature. The control unit 104 is configured to control the opening time of the solenoid valve based on the temperature change rate of the heat dissipation module, the temperature change rate of the control module, and the temperature of the control module. The specific functions and processing of the control unit 104 are described in step S140.

[0106] In some embodiments, the control unit 104 controls the opening time of the solenoid valve according to the temperature change rate of the heat dissipation module, the temperature change rate of the control module, and the temperature of the control module, including: determining the opening time adjustment amount corresponding to the temperature change rate of the heat dissipation module and the temperature of the control module from a preset first opening time control table, recorded as the first opening time adjustment amount; determining the opening time adjustment amount corresponding to the temperature change rate of the control module and the temperature of the control module from a preset second opening time control table, recorded as the second opening time adjustment amount; and adjusting the current opening time of the solenoid valve, the first opening time adjustment amount, and the temperature of the control module. The sum of the second opening time adjustment amount is determined as the new opening time; the solenoid valve is controlled to operate at the new opening time; wherein, in the preset first opening time control table, the temperature change rate of the heat dissipation module is the horizontal coordinate, and the temperature of the control module is the vertical coordinate, that is, the greater the temperature change rate of the heat dissipation module, the greater the opening time adjustment amount, and the greater the temperature of the control module, the greater the opening time adjustment amount; in the preset second opening time control table, the temperature change rate of the control module is the horizontal coordinate, and the temperature of the control module is the vertical coordinate, that is, the greater the temperature change rate of the control module, the greater the opening time adjustment amount, and the greater the temperature of the control module, the greater the opening time adjustment amount.

[0107] The first opening time control table is preset to use the temperature change rate V of the heat dissipation module 管 The horizontal axis is the control module temperature T 模 The vertical axis is used to determine the temperature change trend of the heat dissipation module and the current control module temperature to determine the adjustment direction of the solenoid valve opening time. 管 is negative (heat dissipation module temperature drops) and T 模 When the condensation critical value is approaching, the opening time ton needs to be reduced to increase the pipe temperature and avoid condensation. In some embodiments, the preset first opening time control table is:

[0108] <![CDATA[V 管 <In 管预设1 ]]> <![CDATA[V 管预设1 ≤V 管 <In 管预设2 ]]> <![CDATA[V 管 ≥V 管预设2 ]]> <![CDATA[T 模 <T 模预设1 ]]> <![CDATA[△t A11 ]]> <![CDATA[△t A12 ]]> <![CDATA[△t A13 ]]> <![CDATA[T 模预设1 ≤T 模 <T 模预设2 ]]> <![CDATA[△t A21 ]]> <![CDATA[△t A22 ]]> <![CDATA[△t A23 ]]> <![CDATA[T 模 ≥T 模预设2 ]]> <![CDATA[△t A31 ]]> <![CDATA[△t A32 ]]> <![CDATA[△t A33 ]]>

[0109] In the above preset first opening time control table, V 管 The larger the value, the larger the corresponding opening time adjustment amount. 模The larger the value, the larger the corresponding opening time adjustment amount. For example, in T 模 <T 模预设1 In this case, △t A11 <△t A12 <△t A13 ; In V 管 <V 管预设1 In this case, △t A11 <△t A21 <△t A31 . T 模预设1 、T 模预设 2. V 管预设1 、V 管预设2 Used to divide different ranges, and specific values can be set according to specific circumstances.

[0110] Preset the second opening time control table to control the module temperature change V 模 is the horizontal axis, T 模 is the vertical axis, passing through V 模 Determine the module heating rate. If V 模 Greater than the preset value and T 模 If the temperature is too high, the opening time ton needs to be increased to enhance heat dissipation and prevent the compressor from limiting frequency due to overheating. In some embodiments, the preset second opening time control table is:

[0111] <![CDATA[V 模 <In 模预设1 ]]> <![CDATA[V 模预设1 ≤V 模 <In 模预设2 ]]> <![CDATA[V 模 ≥V 模预设2 ]]> <![CDATA[T 模 <T 模预设1 ]]> <![CDATA[△t B11 ]]> <![CDATA[△t B12 ]]> <![CDATA[△t B13 ]]> <![CDATA[T 模预设1 ≤T 模 <T 模预设2 ]]> <![CDATA[△t B21 ]]> <![CDATA[△t B22 ]]> <![CDATA[△t B23 ]]> <![CDATA[T 模 ≥T 模预设2 ]]> <![CDATA[△t B31 ]]> <![CDATA[△t B32 ]]> <![CDATA[△t B33 ]]>

[0112] In the above preset second opening time control table, V 模 The larger the value, the larger the corresponding opening time adjustment amount. 模 The larger the value, the larger the corresponding opening time adjustment amount. For example, in T 模 <T 模预设1 In this case, △t B11 <△t B12 <△t B13 ; In V 模 <V 模预设1 In this case, △t B11 <△t B21 <△t B31 . T 模预设1 、T 模预设 2. V 模预设1 、V 模预设2 Used to divide different ranges, and specific values can be set according to specific circumstances.

[0113] The first opening time adjustment amount Δt is determined according to the preset first opening time control table and the preset second opening time control table. Aij and the second opening time adjustment value △t Bij Then calculate the new opening time ton_new = current opening time ton + △t Aij +△tBij Among them, △t Aij ,△t Bij It can be greater than or less than 0. If ton_new exceeds the solenoid valve switching cycle t, then ton_new = t; if ton_new < 0, then ton_new = 0. When the solenoid valve opening time is 0, it means that the solenoid valve is closed during the current switching cycle.

[0114] A preset first opening time control table specifically regulates the heat dissipation module's temperature to prevent it from entering the condensation zone due to continuous cooling caused by excessive refrigerant flow, while also preventing insufficient heat dissipation from the control module due to excessive heat dissipation module temperatures. A preset second opening time control table responds to the control module's cooling requirements. Within the critical condensation risk range, this ensures stable heat pipe temperatures while preventing abnormal module temperature increases, maintaining the compressor's high-frequency operating capacity. By adjusting the solenoid valve opening time based on the temperature change rates of the heat dissipation and control modules, a precise balance between anti-condensation requirements and module heat dissipation efficiency is achieved within the critical condensation risk range. This prevents condensation risks caused by continuously decreasing heat pipe temperatures while dynamically adjusting heat dissipation based on module temperature trends to prevent compressor frequency limiting due to overheating.

[0115] The control unit 104 is further configured to control the solenoid valve to close when the condensation risk level of the control module is the high condensation risk, so that no refrigerant flows through the heat dissipation module and the control module begins to heat up to prevent condensation. The specific functions and processing of the control unit 104 are shown in step S150.

[0116] By connecting the heat dissipation module in parallel between two throttling components and using the solenoid valve to control the heat dissipation of the heat dissipation module, while achieving double-stage throttling, it can not only accurately dissipate heat according to the module temperature when there is no condensation risk to avoid cooling loss and ensure high-frequency operation of the compressor, but also dynamically balance the heat dissipation and anti-condensation requirements through the temperature change rate when there is a critical risk, and can also close the solenoid valve when the risk is high to eliminate electrical hazards, thereby improving the refrigeration capacity and ensuring the safe operation of the air conditioner.

[0117] In some embodiments, the control unit 104 is further configured to: when the condensation risk level of the control module is the high condensation risk, after controlling the solenoid valve to close, determine the temperature of the control module; if the temperature of the control module is greater than a second preset temperature, reduce the operating frequency of the compressor; if the temperature of the control module is less than or equal to the second preset temperature, maintain the operating frequency of the compressor unchanged.

[0118] When the solenoid valve is closed under high condensation risk, the heat dissipation module temperature may be low but the control module temperature may be high. Therefore, in order to prevent the control module from overheating, it is necessary to adjust the heat generation of the control module by controlling the operating frequency of the compressor. Specifically, if T模 >T2, indicating that the control module is not cooling enough. The higher the compressor operating frequency, the more heat the control module generates. Therefore, the compressor operating frequency is reduced to reduce heat generation and maintain system stability. If T 模 ≤T2, indicating that the control module can maintain a stable temperature through natural heat dissipation from the environment, without adjusting the compressor frequency, ensuring that the cooling capacity is not affected.

[0119] By controlling the compressor frequency after closing the solenoid valve, the control module is prevented from overheating, thus improving system reliability.

[0120] Figure 4 FIG. 1 is a flow chart of another embodiment of the air conditioner control method of the present invention. Figure 4 As shown, the method includes:

[0121] Step 1: Get the pipe temperature T of the heat dissipation module 管 , compressor control module temperature T 模 , outdoor ambient temperature T 外 , calculate the pipe temperature change rate V of the heat dissipation module 管 , the temperature change rate of the control module V 模 .

[0122] Step 2: Determine T 管 With T 外 If T 管 >T 外 +△T 管外 Then go to step 3. If T 外 <T 管 ≤T 环 +△T 管外 Then go to step 4. If T 管 ≤T 外 Then go to step 5. △T 管外 It is the preset difference between the heat dissipation module temperature and the outdoor ambient temperature.

[0123] Step 3: Determine T 模 If T 模 <T 模预设1 , it is assumed that the module has good heat dissipation. To avoid the loss of air conditioning cooling capacity, the solenoid valve opening time ton is reduced. If T 模预设1 ≤T 模 <T 模预设2 , it is assumed that the heat dissipation of the module is normal. At this time, when V 模 <V 模预设1 When V 模 ≥V 模预设 1, it means the module heats up quickly, and the solenoid valve opening time ton is increased. 模 >T 模预设2, it is believed that the heat dissipation of the module is poor, and the opening time of the solenoid valve is increased by ton to increase the heat dissipation of the refrigerant.

[0124] Step 4: From the preset opening time control table, according to T 模 、V 管 、V 模 Determine the corresponding opening time adjustment value △t Aij and △t Bij , solenoid valve opening time ton = last solenoid valve opening time + △t Aij +△t Bij If the calculated opening time ton is greater than the solenoid valve switching period t, then ton = t; if the calculated opening time ton is less than 0, then ton = 0.

[0125] Step 5: The solenoid valve opening time is reduced to 0, that is, the solenoid valve is closed. 模 >T 模预设2 When the module is considered too high, the compressor frequency limit reduction logic is entered to reduce the heat dissipation of the module.

[0126] Since the processing and functions implemented by the device of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned method, for any details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments and will not be repeated here.

[0127] The technical solution of the present invention connects a heat dissipation module for dissipating heat from a control module in parallel between two throttling components of the system, and a solenoid valve is provided to control the refrigerant flow rate on the branch line containing the heat dissipation module. During air conditioning, the condensation risk level of the control module is determined based on the temperature of the heat dissipation module and the outdoor ambient temperature. When there is no condensation risk, the opening time of the solenoid valve is controlled based on the temperature of the control module. When there is a critical condensation risk, the opening time of the solenoid valve is controlled based on the temperature change rate of the heat dissipation module, the temperature change rate of the control module, and the temperature of the control module. The solenoid valve is closed when there is a high condensation risk. Thus, by implementing two-stage throttling, heat dissipation is controlled based on the temperature of the control module when there is no condensation risk to avoid cooling loss, heat dissipation and condensation prevention are balanced based on the temperature change rate when there is a critical condensation risk, and the solenoid valve is closed when there is a high risk to eliminate safety hazards, thereby improving the system's cooling capacity and ensuring stable operation.

[0128] According to an embodiment of the present invention, an air conditioner corresponding to the air conditioner control device is also provided. The air conditioner may include: the air conditioner control device described above.

[0129] Since the processing and functions implemented by the air conditioner of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned devices, for any details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments and will not be repeated here.

[0130] The technical solution of the present invention connects a heat dissipation module for dissipating heat from a control module in parallel between two throttling components of the system, and a solenoid valve is provided to control the refrigerant flow rate on the branch line containing the heat dissipation module. During air conditioning, the condensation risk level of the control module is determined based on the temperature of the heat dissipation module and the outdoor ambient temperature. When there is no condensation risk, the opening time of the solenoid valve is controlled based on the temperature of the control module. When there is a critical condensation risk, the opening time of the solenoid valve is controlled based on the temperature change rate of the heat dissipation module, the temperature change rate of the control module, and the temperature of the control module. The solenoid valve is closed when there is a high condensation risk. Thus, by implementing two-stage throttling, heat dissipation is controlled based on the temperature of the control module when there is no condensation risk to avoid cooling loss, heat dissipation and condensation prevention are balanced based on the temperature change rate when there is a critical condensation risk, and the solenoid valve is closed when there is a high risk to eliminate safety hazards, thereby improving the system's cooling capacity and ensuring stable operation.

[0131] According to an embodiment of the present invention, a storage medium corresponding to the air conditioner control method is also provided, wherein the storage medium includes a stored program, wherein when the program is running, the device where the storage medium is located is controlled to execute the above-mentioned air conditioner control method.

[0132] Since the processing and functions implemented by the storage medium of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned method, for any details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments and will not be repeated here.

[0133] The technical solution of the present invention connects a heat dissipation module for dissipating heat from a control module in parallel between two throttling components of the system, and a solenoid valve is provided to control the refrigerant flow rate on the branch line containing the heat dissipation module. During air conditioning, the condensation risk level of the control module is determined based on the temperature of the heat dissipation module and the outdoor ambient temperature. When there is no condensation risk, the opening time of the solenoid valve is controlled based on the temperature of the control module. When there is a critical condensation risk, the opening time of the solenoid valve is controlled based on the temperature change rate of the heat dissipation module, the temperature change rate of the control module, and the temperature of the control module. The solenoid valve is closed when there is a high condensation risk. Thus, by implementing two-stage throttling, heat dissipation is controlled based on the temperature of the control module when there is no condensation risk to avoid cooling loss, heat dissipation and condensation prevention are balanced based on the temperature change rate when there is a critical condensation risk, and the solenoid valve is closed when there is a high risk to eliminate safety hazards, thereby improving the system's cooling capacity and ensuring stable operation.

[0134] According to an embodiment of the present invention, a computer program product corresponding to the air conditioner control method is also provided. The computer program product includes a computer program. When the computer program product is processed and executed, the steps of the air conditioner control method are implemented.

[0135] Since the processing and functions implemented by the computer program product of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned method, for any details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments and will not be repeated here.

[0136] The technical solution of the present invention connects a heat dissipation module for dissipating heat from a control module in parallel between two throttling components of the system, and a solenoid valve is provided to control the refrigerant flow rate on the branch line containing the heat dissipation module. During air conditioning, the condensation risk level of the control module is determined based on the temperature of the heat dissipation module and the outdoor ambient temperature. When there is no condensation risk, the opening time of the solenoid valve is controlled based on the temperature of the control module. When there is a critical condensation risk, the opening time of the solenoid valve is controlled based on the temperature change rate of the heat dissipation module, the temperature change rate of the control module, and the temperature of the control module. The solenoid valve is closed when there is a high condensation risk. Thus, by implementing two-stage throttling, heat dissipation is controlled based on the temperature of the control module when there is no condensation risk to avoid cooling loss, heat dissipation and condensation prevention are balanced based on the temperature change rate when there is a critical condensation risk, and the solenoid valve is closed when there is a high risk to eliminate safety hazards, thereby improving the system's cooling capacity and ensuring stable operation.

[0137] In summary, it is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0138] The foregoing description is merely an embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of the claims.

Claims

1. A method for controlling an air conditioner, characterized in that: The air conditioner includes a first throttle component, a second throttle component, a heat dissipation module, and a compressor; the heat dissipation module is used to dissipate heat for the control module of the compressor; a first branch and a second branch are provided in parallel between the first throttle component and the second throttle component; the heat dissipation module is provided on the first branch, and a solenoid valve is provided at the first end and / or the second end of the heat dissipation module; the heat dissipation amount of the heat dissipation module can be adjusted by controlling the opening time of the solenoid valve; The method comprises: During the cooling operation of the air conditioner, obtaining the temperature of the heat dissipation module, the temperature of the control module, and the outdoor ambient temperature; determining a condensation risk level of the control module according to the temperature of the heat dissipation module and the outdoor ambient temperature, wherein the condensation risk level includes no condensation risk, critical condensation risk, and high condensation risk; When the condensation risk level of the control module is the no condensation risk, controlling the opening time of the solenoid valve according to the temperature of the control module; When the condensation risk level of the control module is the critical condensation risk, calculating the temperature change rate of the heat dissipation module and the temperature change rate of the control module, and controlling the opening time of the solenoid valve according to the temperature change rate of the heat dissipation module, the temperature change rate of the control module, and the temperature of the control module; When the condensation risk level of the control module is the high condensation risk, the solenoid valve is controlled to be closed.

2. The air conditioner control method according to claim 1, characterized in that: Determining the condensation risk level of the control module according to the temperature of the heat dissipation module and the outdoor ambient temperature includes: Recording the difference between the temperature of the heat dissipation module and the outdoor ambient temperature as a temperature difference, and determining the relationship between the temperature of the heat dissipation module and the outdoor ambient temperature and the size of the temperature difference; If the temperature of the heat dissipation module is greater than the outdoor ambient temperature, and the temperature difference is greater than a preset temperature difference, determining that the condensation risk level of the control module is the no condensation risk; If the temperature of the heat dissipation module is greater than the outdoor ambient temperature, and the temperature difference is less than or equal to the preset temperature difference, determining that the condensation risk level of the control module is the critical condensation risk; If the temperature of the heat dissipation module is less than or equal to the outdoor ambient temperature, the condensation risk level of the control module is determined to be the high condensation risk.

3. The air conditioner control method according to claim 1 or 2, characterized in that: Controlling the opening time of the solenoid valve according to the temperature of the control module includes: Determining the temperature of the control module; If the temperature of the control module is lower than a preset first temperature, reducing the opening time of the solenoid valve; If the temperature of the control module is greater than or equal to a preset first temperature and less than a preset second temperature, calculating the temperature change rate of the control module, and controlling the opening time of the solenoid valve according to the temperature change rate of the control module; If the temperature of the control module is greater than or equal to a preset second temperature, the opening time of the solenoid valve is increased.

4. The air conditioner control method according to claim 3, characterized in that: Controlling the opening time of the solenoid valve according to the temperature change rate of the control module includes: Determining the magnitude of the temperature change rate of the control module; If the temperature change rate of the control module is less than the preset temperature change rate, the opening time of the solenoid valve is kept unchanged; If the temperature change rate of the control module is greater than or equal to a preset temperature change rate, the opening time of the solenoid valve is increased.

5. The air conditioner control method according to claim 1 or 2, characterized in that: Controlling the opening time of the solenoid valve according to the temperature change rate of the heat dissipation module, the temperature change rate of the control module, and the temperature of the control module includes: Determine an on-time adjustment amount corresponding to the temperature change rate of the heat dissipation module and the temperature of the control module from a preset first on-time control table, and record it as a first on-time adjustment amount; Determine an on-time adjustment amount corresponding to the temperature change rate of the control module and the temperature of the control module from a preset second on-time control table, and record it as a second on-time adjustment amount; Determining the sum of the current opening time of the solenoid valve, the first opening time adjustment amount, and the second opening time adjustment amount as a new opening time; Controlling the solenoid valve to operate at the new opening time; Among them, in the preset first opening time control table, the temperature change rate of the heat dissipation module is the horizontal axis, and the temperature of the control module is the vertical axis; in the preset second opening time control table, the temperature change rate of the control module is the horizontal axis, and the temperature of the control module is the vertical axis.

6. The air conditioner control method according to claim 1, characterized in that: Also includes: When the condensation risk level of the control module is the high condensation risk, after controlling the solenoid valve to close, determining the temperature of the control module; If the temperature of the control module is greater than a second preset temperature, reducing the operating frequency of the compressor; If the temperature of the control module is less than or equal to a second preset temperature, the operating frequency of the compressor is kept unchanged.

7. A control device for an air conditioner, characterized in that: The air conditioner includes a first throttle component, a second throttle component, a heat dissipation module, and a compressor; the heat dissipation module is used to dissipate heat for the control module of the compressor; a first branch and a second branch are provided in parallel between the first throttle component and the second throttle component; the heat dissipation module is provided on the first branch, and a solenoid valve is provided at the first end and / or the second end of the heat dissipation module; the heat dissipation amount of the heat dissipation module can be adjusted by controlling the opening time of the solenoid valve; The device comprises: An acquisition unit is configured to acquire the temperature of the heat dissipation module, the temperature of the control module, and the outdoor ambient temperature during the cooling operation of the air conditioner; a control unit configured to determine a condensation risk level of the control module according to the temperature of the heat dissipation module and the outdoor ambient temperature, wherein the condensation risk level includes no condensation risk, critical condensation risk, and high condensation risk; The control unit is further configured to control the opening time of the solenoid valve according to the temperature of the control module when the condensation risk level of the control module is the no condensation risk; The control unit is further configured to, when the condensation risk level of the control module is the critical condensation risk, calculate the temperature change rate of the heat dissipation module and the temperature change rate of the control module, and control the opening time of the solenoid valve according to the temperature change rate of the heat dissipation module, the temperature change rate of the control module, and the temperature of the control module; The control unit is further configured to control the solenoid valve to close when the condensation risk level of the control module is the high condensation risk.

8. An air conditioner, characterized in that: include: The air conditioner control device according to claim 7.

9. A storage medium, characterized in that: The storage medium includes a stored program, wherein when the program is executed, the device where the storage medium is located is controlled to execute the air conditioner control method according to any one of claims 1 to 6.

10. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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