Air conditioner control method and system

Abstract

The invention relates to the field of household appliances, and provides an air conditioner control method and system.The method comprises the steps that the monitoring temperature is obtained by monitoring the internal environment temperature and the external environment temperature of an electric appliance box; according to the monitoring temperature, determining a humid air dew point temperature, and determining whether the inner surface temperature of the cooling fin in the monitoring temperature is lower than the humid air dew point temperature or not; and determining whether the frequency converter mounted on the cooling fin corresponding to the inner surface temperature of the cooling fin is in a working state or not based on the condition that the inner surface temperature of the cooling fin in the monitored temperature is lower than the dew point temperature of wet air, and controlling the frequency converter to continuously keep the working state based on the condition that the frequency converter mounted on the corresponding cooling fin is in the working state. And controlling the frequency converter to stop working until the inner surface temperature of the corresponding cooling fin is determined to be higher than the preset temperature. The problem that the maintenance cost of the air conditioner is increased due to the fact that condensation on the surfaces of the cooling fins is avoided is solved, and the maintenance cost of the air conditioner is reduced on the basis of preventing condensation on the surfaces of the cooling fins.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and particularly to an air conditioner control method and system. Background Art

[0002] In large variable-frequency multi-connected air conditioners for building applications, there are usually two or more variable-frequency compressors, and the frequency converters used to drive the compressors are installed in the electrical box of the air conditioner. The frequency converter contains power devices, such as an inverter module, a rectifier module, a reactor, a filter capacitor, a power relay or a contactor. To dissipate heat from the power devices, the inverter module and the rectifier module are usually installed on a heat sink, and the fin part of the heat sink is exposed to the air environment outside the electrical box, so as to transfer the heat generated by the rectifier module and the inverter module of the frequency converter to the air environment outside the electrical box through the heat sink. However, the heat of other power devices will be dissipated into the box body, increasing the ambient temperature inside the box. During actual operation, if the air-conditioning heat load is small, in order to match the capacity output of the air conditioner with the heat load, only one of the compressors will be turned on, and the rest of the compressors will be in a stopped state.

[0003] However, when only one variable-frequency compressor is running, the power devices in the frequency converter used to drive this compressor will cause the temperature of its heat sink and the electrical box to rise. Since the fins of the heat sink of the other non-operating frequency converter are connected to the air environment outside the box, when the external environmental temperature is low, the surface temperature of the heat sink exposed inside the electrical box is also low, and it may be lower than the dew point temperature of the wet air inside the electrical box. At this time, dew will condense on the surface of the heat sink. In the case of a large amount of dew, the dew will flow from the surface of the heat sink to the live parts of the frequency converter, causing a short circuit between the live parts and thus burning out these devices.

[0004] Currently, in order to avoid the situation where dew condensation on the surface of the heat sink burns out the hardware circuit of the frequency converter, the following two methods are usually adopted: one is to paste a heat insulation pad on the part of the inner surface of the heat sink where the rectifier module and the inverter module of the frequency converter are not installed, so as to insulate the air inside the electrical box from the inner surface of the heat sink; the other is to increase the ventilation volume of the electrical box, discharge the heat released by the working frequency converter in the electrical box, make the internal temperature of the electrical box close to the external temperature, and reduce the dew point temperature of the internal wet air, so as to avoid the generation of dew condensation on the inner surface of the heat sink of the non-operating frequency converter.

[0005] However, the first method mentioned above requires an additional process of pasting heat insulation pads during the production of the electrical appliance cabinet, which will increase the material cost, reduce the production efficiency, and there is a risk of the heat insulation pads falling off as the air conditioner is used for a longer time; in the second method, although increasing the ventilation volume of the electrical appliance cabinet is beneficial to the heat dissipation of the electrical appliance cabinet, dust and water vapor in the external environment will accumulate inside the electrical appliance cabinet, reducing the insulation protection level of the electrical components inside the electrical appliance cabinet and making it easy to occur abnormalities such as short circuits. Although a filter can be added to the air inlet to filter out some dust, it needs to be cleaned or replaced regularly, increasing the maintenance cost of the air conditioner.

[0006] Summary of the Invention / Utility Model The present invention provides an air conditioner control method and system to solve the defect in the prior art that the air conditioner maintenance cost increases due to avoiding condensation on the surface of the heat sink, reduce the air conditioner maintenance cost, avoid the temperature of the inverter heat sink being lower than the dew point temperature of the humid air inside the electrical appliance cabinet, prevent condensation on the surface of the heat sink, and avoid burning out the hardware circuit of the inverter.

[0007] The present invention provides an air conditioner control method, including: obtaining a monitored temperature, where the monitored temperature is obtained by monitoring the internal and external environment temperatures of the electrical appliance cabinet; determining the dew point temperature of the humid air according to the monitored temperature, and determining whether the inner surface temperature of the heat sink in the monitored temperature is lower than the dew point temperature of the humid air; if the inner surface temperature of the heat sink in the monitored temperature is lower than the dew point temperature of the humid air, determining whether the inverter installed on the heat sink corresponding to the inner surface temperature of the heat sink is in a working state, and if the inverter installed on the corresponding heat sink is in a working state, controlling the inverter to continuously maintain the working state until it is determined that the inner surface temperature of the corresponding heat sink is higher than a preset temperature, and then controlling the inverter to stop working.

[0008] It should be noted that by obtaining the monitored temperature to determine the dew point temperature of the humid air, it is convenient to determine whether the inner surface temperature of the heat sink in the monitored temperature is lower than the dew point temperature of the humid air, and by determining that the inverter installed on the heat sink corresponding to the inner surface temperature of the heat sink is in a working state and determining to continuously maintain the working state of the inverter to implement anti-condensation control, the temperature of the heat sink is increased, avoiding condensation on the surface of the heat sink caused by the temperature of the heat sink being lower than the dew point temperature of the humid air, thereby preventing condensation on the surface of the heat sink, avoiding additional power consumption and burning out the hardware circuit of the inverter, and reducing the air conditioner maintenance cost.

[0009] According to the present invention, an air conditioner control method is provided. It determines whether the frequency converter installed on the heat sink corresponding to the inner surface temperature of the heat sink is in a working state, and further includes: based on the fact that there is a frequency converter on the corresponding heat sink that is not in a working state, determining whether the number of frequency converters installed on the corresponding heat sink is one; based on the number of frequency converters installed on the corresponding heat sink being one, controlling the frequency converter to enter the compressor winding heating state until it is determined that the inner surface temperature of the corresponding heat sink is higher than the preset temperature, and then controlling the frequency converter to stop heating the compressor winding.

[0010] It should be noted that when there is a frequency converter installed on the corresponding heat sink that is not in a working state, if the number of frequency converters installed on the corresponding heat sink is one, then by controlling the frequency converter to enter the compressor winding heating state, the temperature of the heat sink can be increased to avoid the condensation on the surface of the heat sink caused by the temperature of the heat sink being lower than the dew point temperature of the moist air, thus realizing the anti-condensation control.

[0011] According to the air conditioner control method provided by the present invention, controlling the frequency converter to enter the compressor winding heating state includes: controlling to inject a pre-modulated voltage into the compressor winding, and using the copper loss or iron loss of the compressor motor to heat the refrigerating oil stored in the compressor.

[0012] It should be noted that by controlling to inject a pre-modulated voltage into the compressor winding, the generated current and the copper loss or iron loss of the compressor motor are used to heat the compressor motor, thereby heating the refrigerating oil stored at the bottom of the compressor. In addition, after injecting the voltage, a current will be generated. The current flows through the rectifier module and the inverter module of the frequency converter, which will also generate heat and transfer it to the heat sink, increasing the temperature of the heat sink to avoid the condensation on the surface of the heat sink caused by the temperature of the heat sink being lower than the dew point temperature of the moist air, thus realizing the anti-condensation control.

[0013] According to the air conditioner control method provided by the present invention, determining whether the number of frequency converters installed on the corresponding heat sink is one includes: based on the fact that the number of frequency converters installed on the corresponding heat sink is more than one, determining whether other frequency converters are in a working state; where the other frequency converters are used to represent the frequency converters on the corresponding heat sink other than the determined frequency converter that is not in a working state; based on the other frequency converters being in a working state, controlling the other frequency converters to stop working, and controlling the frequency converter that is not in a working state to start working, and performing alternating operation of the frequency converters until it is determined that the inner surface temperature of the corresponding heat sink is higher than the preset temperature, and then controlling the frequency converters to stop the alternating operation.

[0014] When there is more than one frequency converter installed on the corresponding heat sink, if, except for the frequency converters determined to be in the non-operating state as described above, other frequency converters are in the operating state, since the other operating frequency converters will increase the temperature inside the electrical cabinet, and the fins of the heat sink of the non-operating frequency converter are connected to the air environment outside the cabinet, the temperature of the heat sink of the non-operating frequency converter inside the electrical cabinet is higher than the temperature of the fins of the heat sink located outside the electrical cabinet, which is likely to cause dew condensation on the surface of the heat sink. Therefore, it is possible to control other frequency converters to stop operating, control the non-operating frequency converters to start operating, and control multiple frequency converters to operate alternately, so as to prevent dew condensation on the surface of the heat sink of the frequency converter that has not been operating for a long time, and avoid dew flowing from the surface of the heat sink to the live parts of the frequency converter, so as to prevent short circuits or even burnout between the live parts.

[0015] According to an air conditioner control method provided by the present invention, determining whether other frequency converters are in the operating state includes: based on the fact that other frequency converters are not in the operating state, controlling the determined non-operating frequency converter to enter the compressor winding heating state until it is determined that the inner surface temperature of the corresponding heat sink is higher than the preset temperature, and then controlling the frequency converter to stop the compressor winding heating.

[0016] It should be noted that when there are multiple frequency converters and other frequency converters compared with the non-operating frequency converters are not in the operating state, only this non-operating frequency converter needs to be adjusted to enter the compressor winding heating state to increase the temperature of the heat sink of the frequency converter, avoid dew condensation on the surface of the heat sink caused by the heat sink temperature being lower than the dew point temperature of the humid air, and achieve anti-dew condensation control.

[0017] According to an air conditioner control method provided by the present invention, the method further includes: based on determining that the inner surface temperature of the corresponding heat sink is lower than the preset temperature, re-determining whether the frequency converter installed on the heat sink corresponding to the inner surface temperature of the heat sink is in the operating state, and by determining whether the inner surface temperature of the heat sink is lower than the preset temperature, to determine whether the above anti-dew condensation control needs to be stopped while ensuring that no dew condensation occurs on the surface of the heat sink, thereby avoiding causing additional power consumption losses and reducing the operating cost of the air conditioner.

[0018] According to an air conditioner control method provided by the present invention, determining the dew point temperature of the humid air according to the monitored temperature includes: obtaining the dew point temperature of the humid air according to the dry bulb temperature in the monitored temperature and the previously obtained relative humidity.

[0019] It should be noted that by detecting the dry bulb temperature while monitoring the internal environment temperature of the electrical cabinet, it is convenient to determine the corresponding dew point temperature of the humid air, so as to compare the monitored inner surface temperature of the heat sink with the dew point temperature of the humid air to confirm whether anti-dew condensation control is required.

[0020] According to an air conditioner control method provided by the present invention, before obtaining the dew point temperature of humid air based on the dry bulb temperature in the monitored temperature and the relative humidity obtained in advance, it includes: determining whether a relative humidity sensor is installed on the controller of the outdoor unit of the air conditioner; if a relative humidity sensor is installed on the controller of the outdoor unit of the air conditioner, obtaining the value of the relative humidity sensor to obtain the relative humidity.

[0021] It should be noted that since there is a situation where the controller of the outdoor unit of the air conditioner is not installed with a relative humidity sensor, it is necessary to first determine whether the controller of the outdoor unit of the air conditioner is installed with a relative humidity sensor, so as to obtain the relative humidity detected by the relative humidity sensor when the relative humidity sensor is installed, thereby ensuring the accuracy of the determined dew point temperature of humid air.

[0022] According to an air conditioner control method provided by the present invention, determining whether a relative humidity sensor is installed on the controller of the outdoor unit of the air conditioner further includes: if the controller of the outdoor unit of the air conditioner is not installed with a relative humidity sensor, obtaining the pre-set relative humidity.

[0023] It should be noted that by obtaining the pre-set relative humidity, it is possible to avoid the situation where the controller of the outdoor unit of the air conditioner is not installed with a relative humidity sensor and thus unable to obtain the relative humidity.

[0024] The present invention also provides an air conditioner control system, including: a temperature acquisition module that acquires the monitored temperature, where the monitored temperature is obtained by monitoring the internal and external environment temperatures of the electrical appliance box; a judgment module that determines the dew point temperature of humid air according to the monitored temperature, and determines whether the inner surface temperature of the heat sink in the monitored temperature is lower than the dew point temperature of humid air; a control module that, if the inner surface temperature of the heat sink in the monitored temperature is lower than the dew point temperature of humid air, determines whether the frequency converter installed on the heat sink corresponding to the inner surface temperature is in a working state, and based on the fact that the frequency converter installed on the corresponding heat sink is in a working state, controls the frequency converter to continuously maintain the working state until it is determined that the inner surface temperature of the corresponding heat sink is higher than the preset temperature, and then controls the frequency converter to stop working.

[0025] The judgment module determines the dew point temperature of humid air according to the monitored temperature acquired by the temperature acquisition module, so as to facilitate determining whether the inner surface temperature of the heat sink in the monitored temperature is lower than the dew point temperature of humid air, and by using the control module, when it is determined that the frequency converter installed on the heat sink corresponding to the inner surface temperature is in a working state, it is determined to continuously maintain the working state of the frequency converter to implement anti-condensation control, so that the temperature of the heat sink rises, avoiding condensation on the surface of the heat sink caused by the temperature of the heat sink being lower than the dew point temperature of humid air, thereby preventing condensation on the surface of the heat sink, avoiding additional power consumption and burning out the hardware circuit of the frequency converter, and reducing the air conditioner maintenance cost.

[0026] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, the steps of any of the above-mentioned air-conditioning control methods are implemented.

[0027] The present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of any of the above-mentioned air-conditioning control methods are implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 is one of the schematic flowcharts of the air-conditioning control method provided by the present invention; Figure 2 is the second schematic flowchart of the air-conditioning control method provided by the present invention; Figure 3 is the schematic structural diagram of the air-conditioning control system provided by the present invention; Figure 4 is the schematic structural diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] To make the objectives, technical solutions, and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions in the present invention with reference to the drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0031] Figure 1 Describe the schematic flowchart of an air-conditioning control method of the present invention, and the method includes: S11, obtaining the monitored temperature, where the monitored temperature is obtained by monitoring the internal and external environmental temperatures of the monitored electrical appliance box; S12, determining the dew point temperature of the humid air according to the monitored temperature, and determining whether the inner surface temperature of the heat sink in the monitored temperature is lower than the dew point temperature of the humid air; S13. If the temperature on the inner surface of the heat sink in the monitored temperature is lower than the dew point temperature of the humid air, determine whether the frequency converter installed on the heat sink corresponding to the temperature on the inner surface of the heat sink is in the working state. Based on the fact that the frequency converter installed on the corresponding heat sink is in the working state, control the frequency converter to continuously maintain the working state until it is determined that the temperature on the inner surface of the corresponding heat sink is higher than the preset temperature, and then control the frequency converter to stop working.

[0032] It should be noted that the step numbers "S1N" in this specification do not represent the sequence of the air conditioner control method. The following specifically combines Figure 2 to describe the air conditioner control method of the present invention.

[0033] Step S11. Obtain the monitored temperature, which is obtained by monitoring the internal and external environmental temperatures of the electrical cabinet.

[0034] It should be noted that the monitored temperature includes the dry bulb temperature obtained by monitoring the internal environment of the electrical cabinet and the temperature on the inner surface of the heat sink obtained by monitoring the external environment of the electrical cabinet. The monitored temperature can be detected by an environmental temperature sensor. The environmental temperature sensor is used to monitor the internal and external environmental temperatures of the electrical cabinet in real time, so as to timely control the working state of the compressor and avoid the temperature of the frequency converter heat sink being lower than the dew point temperature of the humid air inside the electrical cabinet.

[0035] Step S12. According to the monitored temperature, determine the dew point temperature of the humid air, and determine whether the temperature on the inner surface of the heat sink in the monitored temperature is lower than the dew point temperature of the humid air.

[0036] In this embodiment, determining the dew point temperature of the humid air according to the monitored temperature includes: obtaining the dew point temperature of the humid air according to the dry bulb temperature in the monitored temperature and the pre-obtained relative humidity.

[0037] It should be noted that by detecting the dry bulb temperature while monitoring the internal environmental temperature of the electrical cabinet, it is convenient to use the Magnus-Tetens Approximation to determine the corresponding dew point temperature of the humid air, so as to compare the monitored temperature on the inner surface of the heat sink with the dew point temperature of the humid air to confirm whether anti-condensation control is required.

[0038] In addition, the dew point temperature of the humid air where T represents the dry bulb temperature and RH represents the relative humidity.

[0039] Furthermore, before obtaining the dew point temperature of the humid air according to the dry bulb temperature in the monitored temperature and the pre-obtained relative humidity, it includes: determining whether the controller of the outdoor unit of the air conditioner is equipped with a relative humidity sensor; based on the fact that the controller of the outdoor unit of the air conditioner is equipped with a relative humidity sensor, obtain the value of the relative humidity sensor to obtain the relative humidity.

[0040] It should be noted that since there is a situation where the controller of the outdoor unit of the air conditioner does not install a relative humidity sensor, it is necessary to first determine whether the controller of the outdoor unit of the air conditioner installs a relative humidity sensor, so as to obtain the relative humidity detected by the relative humidity sensor in the case of installing the relative humidity sensor, thereby ensuring the accuracy of the determined dew point temperature of the moist air.

[0041] In addition, determining whether the controller of the outdoor unit of the air conditioner installs a relative humidity sensor also includes: based on the fact that the controller of the outdoor unit of the air conditioner does not install a relative humidity sensor, obtaining the pre-set relative humidity.

[0042] It should be noted that by obtaining the pre-set relative humidity, the situation where the relative humidity cannot be obtained due to the lack of installation of a relative humidity sensor in the controller of the outdoor unit of the air conditioner is avoided. In addition, the pre-set relative humidity can be dynamically set based on the geographical environment and season of the actual outdoor unit of the air conditioner, etc., and can be specifically set according to the actual design situation, and no further limitation is made here.

[0043] In an alternative embodiment, determining whether the inner surface temperature of the heat sink in the monitored temperature is lower than the dew point temperature of the moist air further includes: based on the fact that the inner surface temperature of the heat sink is not lower than the dew point temperature of the moist air, re-obtaining the monitored temperature, and updating the dew point temperature of the moist air according to the re-obtained monitored temperature, so as to re-determine whether the inner surface temperature of the heat sink obtained again is lower than the updated dew point temperature of the moist air, thereby realizing the real-time monitoring of the heat sink temperature and avoiding the situation where the heat sink generates a temperature difference inside and outside the electrical cabinet and causes surface condensation.

[0044] Step S13, based on the fact that the inner surface temperature of the heat sink in the monitored temperature is lower than the dew point temperature of the moist air, determine whether the frequency converter installed on the heat sink corresponding to the inner surface temperature of the heat sink is in the working state, and based on the fact that the frequency converter installed on the corresponding heat sink is in the working state, control the frequency converter to continuously maintain the working state until it is determined that the inner surface temperature of the corresponding heat sink is higher than the preset temperature, and then control the frequency converter to stop working.

[0045] It should be noted that by determining that the inner surface temperature of the heat sink in the monitored temperature is lower than the dew point temperature of the moist air, the anti-condensation control is determined, and by determining whether the frequency converter installed on the heat sink corresponding to the inner surface temperature of the heat sink is in the working state, it is determined which control method is used to implement the anti-condensation control, so as to prevent the surface of the heat sink from condensing, avoid causing additional power consumption and burning out the hardware circuit of the frequency converter, and reduce the air conditioner maintenance cost. In addition, in the case where it is determined that the frequency converter installed on the corresponding heat sink is in the working state, by continuously maintaining the working state of the frequency converter, the temperature of the heat sink is increased to avoid the situation where the surface of the heat sink condenses due to the temperature of the heat sink being lower than the dew point temperature of the moist air, and avoid burning out the circuit of the frequency conversion device.

[0046] In an alternative embodiment, determining whether the frequency converter installed on the heat sink corresponding to the inner surface temperature of the heat sink is in an operating state further includes: based on the fact that there is a frequency converter on the corresponding heat sink that is not in an operating state, determining whether the number of frequency converters installed on the corresponding heat sink is one; based on the number of frequency converters installed on the corresponding heat sink being one, controlling the frequency converter to enter the compressor winding heating state until it is determined that the inner surface temperature of the corresponding heat sink is higher than a preset temperature, and then controlling the frequency converter to stop heating the compressor winding.

[0047] It should be noted that when there is a frequency converter installed on the corresponding heat sink that is not in an operating state, if the number of frequency converters installed on the corresponding heat sink is one, then by controlling the frequency converter to enter the compressor winding heating state, the temperature of the heat sink can be increased to avoid the condensation on the surface of the heat sink caused by the temperature of the heat sink being lower than the dew point temperature of the humid air, thus realizing anti-condensation control.

[0048] Further, controlling the frequency converter to enter the compressor winding heating state includes: controlling the injection of a pre-modulated voltage into the compressor winding and using the copper loss or iron loss of the compressor motor to heat the refrigeration oil stored in the compressor.

[0049] It should be noted that by controlling the injection of a pre-modulated voltage into the compressor winding, the current generated and the copper loss or iron loss of the compressor motor are utilized to heat the compressor motor, thereby heating the refrigeration oil stored at the bottom of the compressor. In addition, after the voltage is injected, a current will be generated. When the current flows through the rectifier module and the inverter module of the frequency converter, heat will also be generated in the rectifier module and the inverter module and transferred to the heat sink, increasing the temperature of the heat sink to avoid the condensation on the surface of the heat sink caused by the temperature of the heat sink being lower than the dew point temperature of the humid air, thus realizing anti-condensation control.

[0050] In addition, determining whether the number of frequency converters installed on the corresponding heat sink is one includes: based on the fact that the number of frequency converters installed on the corresponding heat sink is more than one, determining whether the other frequency converters are in an operating state; where the other frequency converters are used to represent the frequency converters on the corresponding heat sink other than the determined frequency converter that is not in an operating state; based on the other frequency converters being in an operating state, controlling the other frequency converters to stop operating, and controlling the frequency converter that is not in an operating state to start operating, and performing alternating operation of the frequency converters until it is determined that the inner surface temperature of the corresponding heat sink is higher than a preset temperature, and then controlling the frequency converters to stop alternating operation.

[0051] It should be noted that when there is more than one frequency converter installed on the corresponding heat sink, if, in addition to the frequency converters determined to be in a non-operating state as described above, other frequency converters are in an operating state, since the other operating frequency converters will increase the temperature inside the electrical cabinet, and the fins of the heat sink of the non-operating frequency converter are connected to the air environment outside the cabinet, the temperature of the heat sink of the non-operating frequency converter inside the electrical cabinet is higher than the temperature of the fins of the heat sink located outside the electrical cabinet, which is likely to cause condensation of dew on the surface of the heat sink. Therefore, it is possible to control other frequency converters to stop operating, control the non-operating frequency converters to start operating, and control multiple frequency converters to operate alternately, so as to prevent condensation of dew on the surface of the heat sink of the frequency converter that has not been operating for a long time, and avoid dew flowing from the surface of the heat sink to the live parts of the frequency converter, resulting in a short circuit or even burnout between the live parts.

[0052] Furthermore, determining whether other frequency converters are in an operating state includes: based on the fact that other frequency converters are not in an operating state, controlling the determined non-operating frequency converter to enter the compressor winding heating state until it is determined that the inner surface temperature of the corresponding heat sink is higher than the preset temperature, and then controlling the frequency converter to stop the compressor winding heating.

[0053] It should be noted that when there are multiple frequency converters and other frequency converters compared with the non-operating frequency converters are not in an operating state, only this non-operating frequency converter needs to be adjusted to enter the compressor winding heating state to increase the temperature of the heat sink of the frequency converter, avoid condensation on the surface of the heat sink caused by the temperature of the heat sink being lower than the dew point temperature of the humid air, and achieve anti-condensation control.

[0054] In an alternative embodiment, the method further includes: based on determining that the inner surface temperature of the corresponding heat sink is less than the preset temperature, re-determining whether the frequency converter installed on the heat sink corresponding to the inner surface temperature of the heat sink is in an operating state.

[0055] It should be added that the preset temperature can be set based on factors such as the dew point temperature of the humid air, the geographical environment and season of the outdoor unit of the air conditioner. For example, it is 2 degrees higher than the dew point temperature of the humid air, and it can be specifically set according to the actual design situation, and no further limitation is made here. In addition, by determining whether the inner surface temperature of the heat sink is less than the preset temperature, it is possible to determine whether the above anti-condensation control needs to be stopped while ensuring that no condensation occurs on the surface of the heat sink, thereby avoiding additional power consumption losses and reducing the operating cost of the air conditioner.

[0056] In an alternative embodiment, after controlling the frequency converter to stop operating, stop the compressor winding heating or stop the alternating operation, it further includes: re-acquiring the monitored temperature, and based on the re-acquired monitored temperature, updating the dew point temperature of the humid air to re-determine whether the inner surface temperature of the re-acquired heat sink is lower than the updated dew point temperature of the humid air.

[0057] In summary, in the embodiment of the present invention, the monitored temperature is obtained to determine the dew point temperature of the humid air, so as to facilitate determining whether the inner surface temperature of the heat sink in the monitored temperature is lower than the dew point temperature of the humid air, and by determining that the frequency converter installed on the heat sink corresponding to the inner surface temperature of the heat sink is in the working state, it is determined to continuously maintain the working state of the frequency converter to implement anti-condensation control, so that the temperature of the heat sink rises, avoiding condensation on the surface of the heat sink caused by the temperature of the heat sink being lower than the dew point temperature of the humid air, thereby preventing condensation on the surface of the heat sink, avoiding additional power consumption and burning out the hardware circuit of the frequency converter, and reducing the air conditioner maintenance cost.

[0058] The air conditioner control system provided by the present invention will be described below. The air conditioner control system described below can be mutually corresponding and referred to the air conditioner control method described above.

[0059] Figure 3 The structural schematic diagram of an air conditioner control system is shown. The system includes: A temperature acquisition module 31, which acquires the monitored temperature, and the monitored temperature is obtained by monitoring the internal and external environmental temperatures of the electrical appliance box; A judgment module 32, which determines the dew point temperature of the humid air according to the monitored temperature, and determines whether the inner surface temperature of the heat sink in the monitored temperature is lower than the dew point temperature of the humid air; A control module 33, based on the inner surface temperature of the heat sink in the monitored temperature being lower than the dew point temperature of the humid air, determines whether the frequency converter installed on the heat sink corresponding to the inner surface temperature of the heat sink is in the working state, and based on the frequency converter installed on the corresponding heat sink being in the working state, controls the frequency converter to continuously maintain the working state until it is determined that the inner surface temperature of the corresponding heat sink is higher than the preset temperature, and then controls the frequency converter to stop working.

[0060] The judgment module 32 includes: a temperature acquisition unit, which obtains the dew point temperature of the humid air according to the dry bulb temperature in the monitored temperature and the previously acquired relative humidity.

[0061] Further, the judgment module 32 further includes: a sensor judgment unit, which determines whether a relative humidity sensor is installed on the controller of the outdoor unit of the air conditioner before obtaining the dew point temperature of the humid air according to the dry bulb temperature in the monitored temperature and the previously acquired relative humidity; a humidity acquisition unit, based on the controller of the outdoor unit of the air conditioner installing a relative humidity sensor, acquires the value of the relative humidity sensor to obtain the relative humidity.

[0062] In addition, the humidity acquisition unit is further used for: based on the controller of the outdoor unit of the air conditioner not installing a relative humidity sensor, acquiring the previously set relative humidity.

[0063] In an alternative embodiment, the system further includes: a circulation module, which, based on the condition that the temperature of the inner surface of the heat sink is not lower than the dew point temperature of the humid air, re-acquires the monitored temperature, and updates the dew point temperature of the humid air according to the re-acquired monitored temperature, so as to re-determine whether the re-acquired temperature of the inner surface of the heat sink is lower than the updated dew point temperature of the humid air.

[0064] In an alternative embodiment, the control module 33 includes: a quantity determination unit, which determines whether the number of inverters installed on the corresponding heat sink is one based on the presence of an inverter that is not in the working state on the corresponding heat sink; a control unit, which, based on the number of inverters installed on the corresponding heat sink being one, controls the inverter to enter the compressor winding heating state until it is determined that the inner surface temperature of the corresponding heat sink is higher than the preset temperature, and then controls the inverter to stop heating the compressor winding.

[0065] Furthermore, the control unit includes: a voltage control sub-unit, which controls the injection of a pre-modulated voltage into the compressor winding and heats the refrigerant oil stored in the compressor by using the copper loss or iron loss of the compressor motor.

[0066] In addition, the control module 33 further includes: a status judgment unit, which determines whether other inverters are in the working state based on the condition that the number of inverters installed on the corresponding heat sink is more than one; where the other inverters are used to represent the inverters on the corresponding heat sink other than the determined inverter that is not in the working state; a control unit, which, based on the other inverters being in the working state, controls the other inverters to stop working, and controls the inverter that is not in the working state to start working, and performs alternating operation of the inverters until it is determined that the inner surface temperature of the corresponding heat sink is higher than the preset temperature, and then controls the inverters to stop alternating operation.

[0067] Even further, the control unit is further configured to: based on the other inverters not being in the working state, control the determined inverter that is not in the working state to enter the compressor winding heating state until it is determined that the inner surface temperature of the corresponding heat sink is higher than the preset temperature, and then control the inverter to stop heating the compressor winding.

[0068] In an alternative embodiment, the system further includes: a temperature judgment module, which re-determines whether the inverter installed on the heat sink corresponding to the inner surface temperature of the heat sink is in the working state based on the condition that the inner surface temperature of the determined heat sink is less than the preset temperature.

[0069] In an alternative embodiment, the circulation module is further configured to, after controlling the inverter to stop working, stop heating the compressor winding or stop alternating operation, re-acquire the monitored temperature, and update the dew point temperature of the humid air according to the re-acquired monitored temperature, so as to re-determine whether the re-acquired temperature of the inner surface of the heat sink is lower than the updated dew point temperature of the humid air.

[0070] In summary, in the embodiment of the present invention, the determination module determines the dew point temperature of the humid air according to the monitored temperature obtained by the temperature acquisition module, so as to facilitate determining whether the inner surface temperature of the heat sink in the monitored temperature is lower than the dew point temperature of the humid air. And by using the control module, when it is determined that the frequency converter installed on the heat sink corresponding to the inner surface temperature of the heat sink is in the working state, it is determined to continuously maintain the working state of the frequency converter to implement anti-condensation control, so that the temperature of the heat sink rises, avoiding condensation on the surface of the heat sink caused by the temperature of the heat sink being lower than the dew point temperature of the humid air, thereby preventing condensation on the surface of the heat sink, avoiding additional power consumption and burning out the hardware circuit of the frequency converter, and reducing the air conditioner maintenance cost.

[0071] Figure 4 An example of a schematic physical structure diagram of an electronic device is as Figure 4 shown. The electronic device may include: a processor 410, a communication interface 420, a memory 430, and a communication bus 440. Among them, the processor 410, the communication interface 420, and the memory 430 complete mutual communication through the communication bus 440. The processor 410 can call the logical instructions in the memory 430 to execute the air conditioner control method, and the method includes: obtaining the monitored temperature, where the monitored temperature is obtained by monitoring the internal and external environmental temperatures of the electrical cabinet; determining the dew point temperature of the humid air according to the monitored temperature, and determining whether the inner surface temperature of the heat sink in the monitored temperature is lower than the dew point temperature of the humid air; based on the inner surface temperature of the heat sink in the monitored temperature being lower than the dew point temperature of the humid air, determining whether the frequency converter installed on the heat sink corresponding to the inner surface temperature of the heat sink is in the working state, and based on the frequency converter installed on the corresponding heat sink being in the working state, controlling the frequency converter to continuously maintain the working state until it is determined that the inner surface temperature of the corresponding heat sink is higher than the preset temperature, and then controlling the frequency converter to stop working.

[0072] In addition, when the logic instructions in the above-mentioned memory 430 can be implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0073] On the other hand, the present invention also provides a computer program product. The computer program product includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, the computer can execute the air conditioner control method provided by the above-mentioned various methods. The method includes: obtaining a monitored temperature, where the monitored temperature is obtained by monitoring the internal and external environmental temperatures of the electrical appliance box; determining the dew point temperature of the humid air according to the monitored temperature, and determining whether the inner surface temperature of the heat sink in the monitored temperature is lower than the dew point temperature of the humid air; based on the inner surface temperature of the heat sink in the monitored temperature being lower than the dew point temperature of the humid air, determining whether the frequency converter installed on the heat sink corresponding to the inner surface temperature of the heat sink is in a working state, and based on the frequency converter installed on the corresponding heat sink being in a working state, controlling the frequency converter to continuously maintain the working state until it is determined that the inner surface temperature of the corresponding heat sink is higher than a preset temperature, and controlling the frequency converter to stop working.

[0074] On another aspect, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it is implemented to execute the air conditioner control method provided by the above-mentioned various methods. The method includes: obtaining a monitored temperature, where the monitored temperature is obtained by monitoring the internal and external environmental temperatures of the electrical appliance box; determining the dew point temperature of the humid air according to the monitored temperature, and determining whether the inner surface temperature of the heat sink in the monitored temperature is lower than the dew point temperature of the humid air; based on the inner surface temperature of the heat sink in the monitored temperature being lower than the dew point temperature of the humid air, determining whether the frequency converter installed on the heat sink corresponding to the inner surface temperature of the heat sink is in a working state, and based on the frequency converter installed on the corresponding heat sink being in a working state, controlling the frequency converter to continuously maintain the working state until it is determined that the inner surface temperature of the corresponding heat sink is higher than a preset temperature, and controlling the frequency converter to stop working.

[0075] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative efforts.

[0076] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on such an understanding, the essence of the above technical solution, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An air conditioner control method, characterized in that, Including: Obtain the monitored temperature, which is obtained by monitoring the internal and external environmental temperatures of the electrical cabinet; According to the monitored temperature, determine the dew point temperature of the humid air, and determine whether the inner surface temperature of the heat sink in the monitored temperature is lower than the dew point temperature of the humid air; Based on the inner surface temperature of the heat sink in the monitored temperature being lower than the dew point temperature of the humid air, determine whether the frequency converter installed on the heat sink corresponding to the inner surface temperature of the heat sink is in a working state, and based on the frequency converter installed on the corresponding heat sink being in a working state, control the frequency converter to continuously maintain the working state until it is determined that the inner surface temperature of the corresponding heat sink is higher than the preset temperature, and then control the frequency converter to stop working.

2. The air conditioner control method according to claim 1, wherein, Determining whether the frequency converter installed on the heat sink corresponding to the inner surface temperature of the heat sink is in a working state further includes: Based on there being a frequency converter on the corresponding heat sink that is not in a working state, determine whether the number of frequency converters installed on the corresponding heat sink is one; Based on the number of frequency converters installed on the corresponding heat sink being one, control the frequency converter to enter the compressor winding heating state until it is determined that the inner surface temperature of the corresponding heat sink is higher than the preset temperature, and then control the frequency converter to stop heating the compressor winding.

3. The air conditioner control method according to claim 2, wherein Controlling the frequency converter to enter the compressor winding heating state includes: Control to inject a pre-modulated voltage into the compressor winding, and use the copper loss or iron loss of the compressor motor to heat the refrigerant oil stored in the compressor.

4. The air conditioner control method according to claim 2, wherein Determining whether the number of frequency converters installed on the corresponding heat sink is one includes: Based on the number of frequency converters installed on the corresponding heat sink being more than one, determine whether the other frequency converters are in a working state; where the other frequency converters are used to represent the frequency converters on the corresponding heat sink other than the determined non-working frequency converter; based on the other frequency converters being in a working state, control the other frequency converters to stop working, and control the non-working frequency converter to start working, and perform alternating operation of the frequency converters until it is determined that the inner surface temperature of the corresponding heat sink is higher than the preset temperature, and then control the frequency converters to stop alternating operation.

5. The air conditioner control method according to claim 4, wherein, Determining whether the other frequency converters are in a working state includes: Based on the other frequency converters not being in a working state, control the determined non-working frequency converter to enter the compressor winding heating state until it is determined that the inner surface temperature of the corresponding heat sink is higher than the preset temperature, and then control the frequency converter to stop heating the compressor winding.

6. The air conditioner control method according to any one of claims 1-5, characterized in that, The method further includes: Based on determining that the inner surface temperature of the corresponding heat sink is less than the preset temperature, re-determine whether the frequency converter installed on the heat sink corresponding to the inner surface temperature of the heat sink is in a working state.

7. The air conditioner control method according to claim 1, characterized in that According to the monitored temperature, determining the dew point temperature of the humid air includes: Obtain the dew point temperature of the humid air according to the dry bulb temperature in the monitored temperature and the pre-acquired relative humidity.

8. The air conditioner control method according to claim 7, wherein Before obtaining the dew point temperature of the humid air according to the dry bulb temperature in the monitored temperature and the pre-acquired relative humidity, it includes: Determine whether the controller of the outdoor unit of the air conditioner is equipped with a relative humidity sensor; Based on the controller of the outdoor unit of the air conditioner being equipped with a relative humidity sensor, obtain the value of the relative humidity sensor to obtain the relative humidity.

9. The air conditioner control method according to claim 8, characterized in that, Determining whether a relative humidity sensor is installed in the controller of the outdoor unit of the air conditioner further includes: Based on the fact that the relative humidity sensor is not installed in the controller of the outdoor unit of the air conditioner, obtaining the preset relative humidity.

10. An air-conditioning control system, characterized in that, Including: A temperature acquisition module that acquires the monitored temperature, where the monitored temperature is obtained by monitoring the internal and external environment temperatures of the electrical appliance box; A judgment module that determines the dew point temperature of the humid air according to the monitored temperature and determines whether the inner surface temperature of the heat sink in the monitored temperature is lower than the dew point temperature of the humid air; A control module that, based on the fact that the inner surface temperature of the heat sink in the monitored temperature is lower than the dew point temperature of the humid air, determines whether the frequency converter installed on the heat sink corresponding to the inner surface temperature of the heat sink is in a working state, and based on the fact that the frequency converter installed on the corresponding heat sink is in a working state, controls the frequency converter to continuously maintain the working state until it is determined that the inner surface temperature of the corresponding heat sink is higher than the preset temperature, and then controls the frequency converter to stop working.

11. An electronic device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein, When the processor executes the program, it implements the steps of the air conditioner control method according to any one of claims 1 to 9.

12. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the air conditioner control method according to any one of claims 1 to 9.

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