Anti-condensation control method and device for radiator and air conditioner

Abstract

The invention provides an anti-condensation control method and device for a radiator and an air conditioner, and is applied to the field of air conditioner control. The method comprises the steps that after the air conditioner is powered on and runs, an electronic expansion valve is controlled to run by taking the initial opening degree as the maximum opening degree for a preset detection period; a first temperature value is obtained, a temperature difference value between the first temperature value and a preset environment temperature is calculated, and the first temperature value is a detection value of the temperature sensor; and comparing the temperature difference value with the dew point temperature, adjusting the opening degree of the electronic expansion valve according to a comparison result, and / or detecting a period. According to the anti-condensation control method and device for the radiator and the air conditioner, the refrigerant radiator is prevented from generating condensation water, and the operation reliability of the electric control board is improved.

Description

Technical Field

[0001] This application relates to the field of air conditioner control, and particularly to a method and device for preventing condensation on a radiator and an air conditioner. Background Art

[0002] With the continuous improvement of people's living standards and the continuous improvement of the intelligent level of household electrical appliances, intelligent household appliances are becoming more and more popular. Users can use an air conditioner for heating in winter to increase the indoor temperature; they can also use an air conditioner for cooling in summer to reduce the indoor temperature.

[0003] In the related art, based on the air-conditioning refrigeration system, the refrigerant can be used to take away the heat generated by the electric control box during the operation of the whole machine, thereby reducing the temperature of the electric control board and improving the reliability of the operation of the electric control board. However, due to the low exhaust temperature, the opening of the electronic expansion valve of the outdoor unit will become smaller, the throttling will increase, which may cause the temperature of the refrigerant heat dissipation pipe to be lower than the dew point temperature, and then cause condensation water to be generated on the electric control board, which will have an irreversible impact on the operation of the air conditioner.

[0004] Based on this, there is an urgent need for a control method to avoid the generation of condensation water on the refrigerant radiator and improve the reliability of the operation of the electric control board. Summary of the Invention

[0005] The purpose of this application is to provide a method and device for preventing condensation on a radiator and an air conditioner, which are used to avoid the generation of condensation water on the refrigerant radiator and improve the reliability of the operation of the electric control board.

[0006] This application provides a method for preventing condensation on a radiator, including: After the air conditioner is powered on and running, control the electronic expansion valve to run at the maximum opening for a preset detection period; obtain a first temperature value, and calculate the temperature difference between the first temperature value and a preset ambient temperature; the first temperature value is the detection value of the temperature sensor; compare the temperature difference with the dew point temperature, and adjust the opening of the electronic expansion valve and / or the detection period according to the comparison result.

[0007] Optionally, comparing the temperature difference with the dew point temperature and adjusting the opening of the electronic expansion valve and / or the detection period according to the comparison result includes: when the air conditioner is in a stable operation state, if the temperature difference is greater than the dew point temperature, adjust it according to a first opening adjustment mode; wherein, the first opening adjustment mode is: the greater the difference between the temperature difference and the dew point temperature, the greater the adjustment value of the opening of the electronic expansion valve, and the adjusted opening of the electronic expansion valve is less than or equal to the maximum opening value.

[0008] Optionally, comparing the temperature difference with the dew point temperature, and adjusting the opening degree and detection period of the electronic expansion valve according to the comparison result includes: when the air conditioner is in a stable operation state, if the temperature difference is less than or equal to the dew point temperature, reducing the maximum opening value according to a preset ratio, and adjusting according to a second opening adjustment mode, and each adjustment value of the opening degree of the electronic expansion valve is less than the adjustment value of the opening degree of the electronic expansion valve each time in the first opening adjustment mode.

[0009] Optionally, comparing the temperature difference with the dew point temperature, and adjusting the opening degree of the electronic expansion valve, and / or the detection period according to the comparison result includes: calculating an opening difference between the current opening degree of the electronic expansion valve and the opening degree before adjustment, and adjusting the detection period based on the opening difference; wherein, the duration indicated by the detection period is negatively correlated with the opening difference.

[0010] Optionally, before comparing the temperature difference with the dew point temperature and adjusting the opening degree of the electronic expansion valve, and / or the detection period according to the comparison result, the method further includes: obtaining a plurality of operating frequency values of the compressor of the air conditioner within a preset duration, and calculating a mean square deviation of the plurality of operating frequency values to obtain a frequency fluctuation value; determining that the air conditioner is in a stable operation state when the frequency fluctuation value is less than a preset fluctuation threshold.

[0011] Optionally, comparing the temperature difference with the dew point temperature, and adjusting the opening degree of the electronic expansion valve, and / or the detection period according to the comparison result includes: when the operation mode of the air conditioner changes and the temperature difference is greater than the dew point temperature, adjusting the opening degree of the electronic expansion valve to the initial value of the maximum opening value until the temperature difference is less than a first preset temperature difference threshold; when the temperature difference is less than the preset temperature difference threshold, gradually reducing the opening degree of the electronic expansion valve until the difference between the temperature difference and the dew point temperature is less than a second preset temperature difference threshold.

[0012] Optionally, comparing the temperature difference with the dew point temperature, and adjusting the opening degree of the electronic expansion valve, and / or the detection period according to the comparison result includes: when the operation mode of the air conditioner changes and the temperature difference is less than or equal to the dew point temperature, adjusting the opening degree of the electronic expansion valve to the minimum value until the magnitude relationship between the first temperature value and the second temperature value changes; when the magnitude relationship between the first temperature value and the second temperature value changes, gradually increasing the opening degree of the electronic expansion valve until the temperature difference is greater than the dew point temperature.

[0013] The present application also provides a radiator anti-condensation control device, including: A control module, configured to control the electronic expansion valve to operate at a maximum opening degree for a preset detection period after the air conditioner is powered on and operates; an acquisition module, configured to acquire a first temperature value and calculate a temperature difference between the first temperature value and a preset ambient temperature; the first temperature value is the detected value of the temperature sensor; the control module is further configured to compare the temperature difference with the dew point temperature and adjust the opening degree of the electronic expansion valve and / or the detection period according to the comparison result.

[0014] Optionally, the control module is specifically configured to, when the air conditioner is in a stable operation state, if the temperature difference is greater than the dew point temperature, adjust according to a first opening degree adjustment mode; wherein, the first opening degree adjustment mode is: the greater the difference between the temperature difference and the dew point temperature, the greater the adjustment value of the opening degree of the electronic expansion valve and the adjusted opening degree of the electronic expansion valve is less than or equal to the maximum opening degree value.

[0015] Optionally, the control module is specifically configured to, when the air conditioner is in a stable operation state, if the temperature difference is less than or equal to the dew point temperature, reduce the maximum opening degree value according to a preset ratio and adjust according to a second opening degree adjustment mode, and each adjustment value of the opening degree of the electronic expansion valve is less than the adjustment value of the opening degree of the electronic expansion valve in the first opening degree adjustment mode each time.

[0016] Optionally, the control module is specifically configured to calculate an opening degree difference between the current opening degree of the electronic expansion valve and the opening degree before adjustment, and adjust the detection period based on the opening degree difference; wherein, the duration indicated by the detection period is negatively correlated with the opening degree difference.

[0017] Optionally, the device further includes: a determination module; the acquisition module is further configured to acquire a plurality of operating frequency values of the compressor of the air conditioner within a preset duration and calculate the mean square deviation of the plurality of operating frequency values to obtain a frequency fluctuation value; the determination module is configured to determine that the air conditioner is in a stable operation state when the frequency fluctuation value is less than a preset fluctuation threshold.

[0018] Optionally, the control module is specifically configured to, when the operation mode of the air conditioner changes and the temperature difference is greater than the dew point temperature, adjust the opening degree of the electronic expansion valve to the initial value of the maximum opening degree value until the temperature difference is less than a first preset temperature difference threshold; the control module is further specifically configured to, when the temperature difference is less than the preset temperature difference threshold, gradually reduce the opening degree of the electronic expansion valve until the difference between the temperature difference and the dew point temperature is less than a second preset temperature difference threshold.

[0019] Optionally, the control module is specifically configured to adjust the opening degree of the electronic expansion valve to the minimum value until the magnitude relationship between the first temperature value and the second temperature value changes when the operating mode of the air conditioner changes and the temperature difference is less than or equal to the dew point temperature; the control module is further specifically configured to gradually increase the opening degree of the electronic expansion valve until the temperature difference is greater than the dew point temperature when the magnitude relationship between the first temperature value and the second temperature value changes.

[0020] The present application also provides a computer program product, including a computer program / instructions, which when executed by a processor, implement the steps of the radiator anti-condensation control method as described in any one of the above.

[0021] The present application also provides an electronic device, which may be an air conditioner. The air conditioner includes: a control unit and a refrigerant radiator branch, and the heat dissipation flow path is connected in parallel to the refrigerant main pipeline of the air conditioner; a temperature sensor is arranged on the heat dissipation flow path; the control unit includes a memory, a processor, and a computer program stored on the memory and executable on the processor, and when the processor executes the program, it implements the steps of the radiator anti-condensation control method as described in any one of the above.

[0022] The present application also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it implements the steps of the radiator anti-condensation control method as described in any one of the above.

[0023] The radiator anti-condensation control method, device and air conditioner provided by the present application are applied to a control unit arranged on the air conditioner; the control unit is used to control the opening degree of an electronic expansion valve on the heat dissipation flow path; the heat dissipation flow path is connected in parallel to the refrigerant main pipeline of the air conditioner; a temperature sensor is arranged on the heat dissipation flow path; first, after the air conditioner is powered on and operates, control the electronic expansion valve to operate at the maximum opening degree for a preset detection period; then, obtain a first temperature value and calculate the temperature difference between the first temperature value and a second temperature value; the first temperature value is the detection value of the temperature sensor; the second temperature value is the set temperature of the air conditioner; finally, compare the temperature difference with the dew point temperature, and adjust the opening degree of the electronic expansion valve and / or the detection period according to the comparison result. In this way, it is possible to prevent condensed water from being generated on the surface of the heat dissipation flow path, and further avoid the condensed water from entering the electronic control board, resulting in a failure of the electronic control board, and improving the reliability of the operation of the electronic control board. Description of the Drawings

[0024] To more clearly illustrate the technical solutions in the present application or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0025] Figure 1 is a schematic diagram of the operating principle of the air conditioner provided by the present application; Figure 2 is a schematic diagram of the structure of the refrigerant heat dissipation system of the air conditioner provided by the present application; Figure 3 is a schematic flowchart of the method for controlling anti-condensation of the radiator provided by the present application; Figure 4 is a schematic diagram of the structure of the anti-condensation control device of the radiator provided by the present application; Figure 5 is a schematic diagram of the structure of the electronic device provided by the present application. Detailed Embodiments

[0026] To make the objectives, technical solutions, and advantages of the present application clearer, the following will clearly and completely describe the technical solutions in the present application with reference to the accompanying drawings in the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present application.

[0027] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally indicates an "or" relationship between the associated objects before and after.

[0028] The following will describe in detail the operating principle of the air conditioner involved in the embodiments of the present application: As Figure 1As shown in the figure, the compressor compresses the refrigerant, transports it through a pipeline to the condenser, where the high-temperature and high-pressure gaseous refrigerant releases heat and becomes a medium-temperature and high-pressure liquid refrigerant. Then, the medium-temperature and high-pressure liquid refrigerant passes through a capillary tube (throttling unit) to reduce the pressure and becomes a low-temperature and low-pressure liquid refrigerant. The low-temperature and low-pressure liquid refrigerant is transported to the evaporator, where it evaporates from a liquid to a gas and absorbs a large amount of heat during the evaporation process. Finally, the low-temperature and low-pressure gaseous refrigerant in the evaporator is transported to the compressor to participate in the next cycle. When the air conditioner is cooling, the heat exchanger of the outdoor unit is the condenser, and the heat exchanger of the indoor unit is the evaporator; conversely, when the air conditioner is heating, the heat exchanger of the outdoor unit is the evaporator, and the heat exchanger of the indoor unit is the condenser.

[0029] Dew point / dew point temperature Td, when the water vapor content in the air remains unchanged and the air pressure is kept constant, the temperature at which the air is cooled to saturation is called the dew point temperature, abbreviated as the dew point, and the unit is expressed in °C or °F. In fact, it is also the temperature at which water vapor and water reach an equilibrium state. The difference between the actual temperature t and the dew point temperature Td represents the degree of saturation of the air. When t > Td, it means the air is unsaturated; when t = Td, it is saturated; when t < Td, it is supersaturated.

[0030] In the refrigerant heat dissipation system in the related art, due to the shape of the inner channel of the designed radiator, all the refrigerant passes through the refrigerant radiator, resulting in throttling losses and affecting the performance. The refrigerant flow rate entering the existing refrigerant heat dissipation system is constant. Therefore, it is impossible to adjust the refrigerant heat dissipation temperature according to the temperature of the refrigerant radiator, and the temperature of the refrigerant radiator cannot be kept constant under different environments and different loads.

[0031] The radiator anti-condensation control method provided by the embodiments of the present application compares the real-time detected value of the temperature of the refrigerant radiator with the ambient temperature and adjusts the refrigerant flow rate. It can not only cool the electronic control unit more effectively and quickly, reduce the risk of circuit overheating, but also distribute the refrigerant entering the cold radiator according to actual needs, avoid the risk of condensation, and can achieve precise and continuous control of the temperature of the refrigerant radiator.

[0032] The embodiments of the present application have improved the refrigerant radiator of the air conditioner, as Figure 2 shown, this heat dissipation flow path is connected in parallel to the main refrigerant pipeline of the air conditioner, and the refrigerant flow rate entering the heat dissipation flow path is controlled by the opening degree of the electronic expansion valve LEV1. A temperature sensor is also provided on the heat dissipation flow path to monitor the temperature of the heat dissipation pipe of the heat dissipation flow path in real time.

[0033] The following will combine the accompanying drawings to describe in detail the radiator anti-condensation control method provided by the embodiments of the present application through specific embodiments and their application scenarios.

[0034] As Figure 3As shown in the figure, a method for controlling anti-condensation of a radiator provided by an embodiment of the present application may include the following steps 301 to 303: Step 301: After the air conditioner is powered on and operates, control the electronic expansion valve to operate at the maximum opening degree for a preset detection period with the initial opening degree being the maximum opening degree.

[0035] Among them, the maximum opening degree value of the electronic expansion valve is used to limit the maximum opening degree of the electronic expansion valve.

[0036] Exemplarily, both the above detection period and the maximum opening degree value have corresponding initial default values, and are adjusted according to the actual situation during the control process.

[0037] Step 302: Obtain a first temperature value, and calculate the temperature difference between the first temperature value and a second temperature value.

[0038] Among them, the first temperature value is the detection value of the temperature sensor; the second temperature value is the set temperature of the air conditioner.

[0039] Step 303: Compare the temperature difference with the dew point temperature, and adjust the opening degree of the electronic expansion valve and / or the detection period according to the comparison result.

[0040] Exemplarily, the operation of adjusting the opening degree of the electronic expansion valve includes: calculating the temperature difference between the first temperature value and the second temperature value, and under the constraint of the maximum opening degree value, adjusting at least one of the opening degree of the electronic expansion valve and the control parameter based on the comparison result between the temperature difference and the dew point temperature of the environment where the air conditioner is located.

[0041] Exemplarily, after ensuring the stable operation of the air conditioner, the opening degree control operation of the electronic expansion valve can be cyclically executed according to the detection period to avoid generating condensed water. In the embodiment of the present application, it can be divided into the following three control scenarios: Scenario 1: In Scenario 1, the air conditioner is in a stable operation state, and the temperature difference between the first temperature value and the second temperature value is greater than the dew point temperature.

[0042] Specifically, in the above step 202, for the control method of Scenario 1, it may further include the following step 202a: Step 202a: When the air conditioner is in a stable operation state, if the temperature difference is greater than the dew point temperature, adjust according to the first opening degree adjustment mode.

[0043] Among them, the first opening degree adjustment mode is: the greater the difference between the temperature difference and the dew point temperature, the greater the adjustment value of the opening degree of the electronic expansion valve, and the opening degree of the electronic expansion valve after adjustment is less than or equal to the maximum opening degree value.

[0044] Exemplarily, when the air conditioner is in a stable operating state, if the temperature difference between the first temperature value and the second temperature value is greater than the dew point temperature, the opening degree of the electronic expansion valve can be roughly adjusted. Moreover, during the process of adjusting the opening degree of the electronic expansion valve, the opening degree of the electronic expansion valve cannot exceed the above maximum opening degree value.

[0045] Exemplarily, the above detection period is used to control the temperature acquisition and the adjustment of the opening degree of the electronic expansion valve.

[0046] It should be noted that in the embodiments of the present application, branch heat dissipation is adopted, and the heat dissipation flow path is connected to the main refrigerant pipeline in a parallel manner, without generating pressure drop, realizing the temperature control of refrigerant heat dissipation and meeting the use requirements.

[0047] Scenario 2: In Scenario 2, the air conditioner is in a stable operating state, and the temperature difference between the first temperature value and the second temperature value is less than or equal to the dew point temperature.

[0048] Specifically, in the above step 202, for the control method in Scenario 2, the following step 202b may further be included: Step 202b: When the air conditioner is in a stable operating state, if the temperature difference is less than or equal to the dew point temperature, the maximum opening degree value is reduced according to a preset ratio, and adjustment is performed according to the second opening degree adjustment mode.

[0049] Wherein, the adjustment value of the opening degree each time in the second opening degree adjustment mode is less than the adjustment value of the opening degree each time in the first opening degree adjustment mode.

[0050] Exemplarily, when the air conditioner is in a stable operating state, if the temperature difference between the first temperature value and the second temperature value is less than or equal to the dew point temperature, that is, the magnitudes of the above first temperature value and the second temperature value are reversed, the above maximum opening degree value can be adjusted to half of the initial default value (i.e., the above preset ratio) to achieve fine adjustment of the opening degree of the electronic expansion valve.

[0051] Specifically, in the above step 202, the step of adjusting the opening degree of the electronic expansion valve and the detection period based on the temperature difference may further include the following step 202c: Step 202c: Calculate the opening degree difference between the current opening degree of the electronic expansion valve and the opening degree before adjustment, and adjust the detection period based on the opening degree difference.

[0052] Wherein, the duration indicated by the detection period is negatively correlated with the opening degree difference.

[0053] Exemplarily, after adjusting the opening degree of the electronic expansion valve, it is necessary to calculate the opening degree adjustment amount (i.e., the above-mentioned opening degree difference). After that, based on this opening degree adjustment amount, the detection period is adjusted. The larger the opening degree adjustment amount, the shorter the detection interval indicated by the detection period. On the contrary, the larger the opening degree adjustment amount, the longer the detection interval indicated by the detection period. The shorter the detection interval, the faster the control frequency. By reducing the detection interval, rapid and precise control of the opening degree of the electronic expansion valve can be achieved.

[0054] Scenario 3: In Scenario 3, if the operating mode of the air conditioner changes, it is necessary to control the opening degree of the electronic expansion valve according to the comparison result between the temperature difference and the dew point temperature. And before control, the above maximum opening degree value needs to be adjusted to the initial default value.

[0055] Exemplarily, in Scenario 3, the comparison result between the temperature difference and the dew point temperature can be divided into the following two cases: Case 1: In Case 1, the operating mode of the air conditioner changes and the temperature difference is greater than the dew point temperature.

[0056] Specifically, the above step 202 may further include the following steps 202d1 and 202d2: Step 202d1, when the operating mode of the air conditioner changes and the temperature difference is greater than the dew point temperature, adjust the opening degree of the electronic expansion valve to the initial value of the maximum opening degree value until the temperature difference is less than the first preset temperature difference threshold.

[0057] Step 202d2, when the temperature difference is less than the preset temperature difference threshold, gradually reduce the opening degree of the electronic expansion valve until the difference between the temperature difference and the dew point temperature is less than the second preset temperature difference threshold.

[0058] Exemplarily, when the temperature difference is greater than the dew point temperature, the opening degree of the electronic expansion valve can be adjusted to the maximum value allowed by the maximum opening degree value until the first temperature value and the second temperature value are close. At this time, the opening degree can be gradually reduced until the temperature difference between the first temperature and the second temperature is close to the dew point temperature.

[0059] Case 1: In Case 1, the operating mode of the air conditioner changes and the temperature difference is less than or equal to the dew point temperature.

[0060] Specifically, the above step 202 may further include the following steps 202e1 and 202e2: Step 202e1: When the operating mode of the air conditioner changes and the temperature difference is less than or equal to the dew point temperature, adjust the opening degree of the electronic expansion valve to the minimum value until the magnitude relationship between the first temperature value and the second temperature value changes.

[0061] Step 202e2: When the magnitude relationship between the first temperature value and the second temperature value changes, gradually increase the opening degree of the electronic expansion valve until the temperature difference is greater than the dew point temperature.

[0062] Exemplarily, when the temperature difference is less than or equal to the dew point temperature, the opening degree of the electronic expansion valve can be adjusted to the minimum until the magnitude relationship between the first temperature value and the second temperature value is reversed (for example, from the second temperature value being greater than the first temperature value to the first dimension being greater than the second temperature value). At this time, the opening degree can be gradually reduced until the temperature difference between the first temperature and the second temperature approaches the dew point temperature.

[0063] Optionally, in the embodiments of the present application, the mean square deviation of the compressor operating frequency can be used to determine whether the air conditioner is in a stable operating state.

[0064] Exemplarily, before the above step 202, the radiator anti-condensation control method provided by the embodiments of the present application may further include the following steps 203 and 204: Step 203: Obtain multiple operating frequency values of the compressor of the air conditioner within a preset time period, and calculate the mean square deviation of the multiple operating frequency values to obtain a frequency fluctuation value.

[0065] Step 204: When the frequency fluctuation value is less than a preset fluctuation threshold, determine that the air conditioner is in a stable operating state.

[0066] Exemplarily, the mean square deviation can measure the fluctuation magnitude of a set of data. When the air conditioner does not control the compressor to reduce the operating frequency, the smaller the mean square deviation of the compressor operating frequency, the more stable its operation.

[0067] It should be noted that the radiator anti-condensation control method provided by the embodiments of the present application adopts the proportional differential control idea of simultaneously changing the opening degree of the electronic expansion valve and the control time. It can adjust quickly when the temperature difference is large and adjust precisely when the temperature difference is small, realizing the constant temperature control and anti-condensation control of the heat dissipation flow path, ensuring the operation reliability of the heat dissipation flow path, and enabling the air conditioning system to operate normally under various working conditions.

[0068] The anti-condensation control method for the radiator provided by the embodiment of the present application is applied to the control unit set on the air conditioner; the control unit is used to control the opening degree of the electronic expansion valve on the heat dissipation flow path; the heat dissipation flow path is connected in parallel to the refrigerant main pipeline of the air conditioner; a temperature sensor is arranged on the heat dissipation flow path; first, after the air conditioner is powered on and operates, control the electronic expansion valve to operate at the maximum opening degree with the initial opening degree for a preset detection period; then, obtain the first temperature value and calculate the temperature difference between the first temperature value and the second temperature value; the first temperature value is the detection value of the temperature sensor; the second temperature value is the set temperature of the air conditioner; finally, compare the temperature difference with the dew point temperature, and adjust the opening degree of the electronic expansion valve and / or the detection period according to the comparison result. In this way, condensation water can be prevented from generating on the surface of the heat dissipation flow path, and further, the condensation water is prevented from entering the electronic control board, resulting in a failure of the electronic control board, and the reliability of the operation of the electronic control board is improved.

[0069] It should be noted that for the anti-condensation control method for the radiator provided by the embodiment of the present application, the execution subject can be an anti-condensation control device for the radiator, or a control module in the anti-condensation control device for the radiator that is used to execute the anti-condensation control method for the radiator. In the embodiment of the present application, the anti-condensation control device for the radiator executing the anti-condensation control method for the radiator is taken as an example to illustrate the anti-condensation control device for the radiator provided by the embodiment of the present application.

[0070] It should be noted that in the embodiment of the present application, the anti-condensation control method for the radiator shown in each of the above method drawings is exemplarily described by taking one drawing in the embodiment of the present application as an example. Specifically, when implemented, the anti-condensation control method for the radiator shown in each of the above method drawings can also be implemented in combination with any other combinable drawings schemed in the above embodiments, which will not be elaborated here.

[0071] The anti-condensation control device for the radiator provided by the present application will be described below, and the following description can be mutually corresponding and referred to the anti-condensation control method for the radiator described above.

[0072] Figure 4 The structural schematic diagram of the anti-condensation control device for the radiator provided by an embodiment of the present application is as Figure 4 shown, and specifically includes: A control module 401, configured to control the electronic expansion valve to operate at the maximum opening degree with the initial opening degree for a preset detection period after the air conditioner is powered on and operates; an acquisition module 402, configured to acquire a first temperature value and calculate the temperature difference between the first temperature value and the preset ambient temperature; the first temperature value is the detection value of the temperature sensor; the control module 401 is further configured to compare the temperature difference with the dew point temperature, and adjust the opening degree of the electronic expansion valve and / or the detection period according to the comparison result.

[0073] Optionally, the control module 401 is specifically configured to, when the air conditioner is in a stable operation state, if the temperature difference is greater than the dew point temperature, adjust according to a first opening adjustment mode; wherein, the first opening adjustment mode is: the greater the difference between the temperature difference and the dew point temperature, the greater the adjustment value of the opening of the electronic expansion valve and the adjusted opening of the electronic expansion valve is less than or equal to the maximum opening value.

[0074] Optionally, the control module 401 is specifically configured to, when the air conditioner is in a stable operation state, if the temperature difference is less than or equal to the dew point temperature, reduce the maximum opening value according to a preset ratio, and adjust according to a second opening adjustment mode, and each adjustment value of the opening of the electronic expansion valve is less than the adjustment value of the opening of the electronic expansion valve in the first opening adjustment mode each time.

[0075] Optionally, the control module 401 is specifically configured to calculate an opening difference between the current opening of the electronic expansion valve and the opening before adjustment, and adjust the detection period based on the opening difference; wherein, the duration indicated by the detection period is negatively correlated with the opening difference.

[0076] Optionally, the device further includes: a determination module; the acquisition module 402 is further configured to acquire a plurality of operating frequency values of the compressor of the air conditioner within a preset duration, and calculate a mean square deviation of the plurality of operating frequency values to obtain a frequency fluctuation value; the determination module is configured to determine that the air conditioner is in a stable operation state when the frequency fluctuation value is less than a preset fluctuation threshold.

[0077] Optionally, the control module 401 is specifically configured to, when the operation mode of the air conditioner changes and the temperature difference is greater than the dew point temperature, adjust the opening of the electronic expansion valve to the initial value of the maximum opening value until the temperature difference is less than a first preset temperature difference threshold; the control module 401 is further specifically configured to, when the temperature difference is less than the preset temperature difference threshold, gradually reduce the opening of the electronic expansion valve until the difference between the temperature difference and the dew point temperature is less than a second preset temperature difference threshold.

[0078] Optionally, the control module 401 is specifically configured to, when the operation mode of the air conditioner changes and the temperature difference is less than or equal to the dew point temperature, adjust the opening of the electronic expansion valve to the minimum value until the magnitude relationship between the first temperature value and the second temperature value changes; the control module 401 is further specifically configured to, when the magnitude relationship between the first temperature value and the second temperature value changes, gradually increase the opening of the electronic expansion valve until the temperature difference is greater than the dew point temperature.

[0079] The anti-condensation control device for the radiator provided by this application is applied to the control unit set on the air conditioner; the control unit is used to control the opening degree of the electronic expansion valve on the heat dissipation flow path; the heat dissipation flow path is connected in parallel to the refrigerant main pipeline of the air conditioner; a temperature sensor is arranged on the heat dissipation flow path; first, after the air conditioner is powered on and operates, control the electronic expansion valve to operate at the maximum opening degree as the initial opening degree for a preset detection period; then, obtain the first temperature value and calculate the temperature difference between the first temperature value and the second temperature value; the first temperature value is the detection value of the temperature sensor; the second temperature value is the set temperature of the air conditioner; finally, compare the temperature difference with the dew point temperature, and adjust the opening degree of the electronic expansion valve and / or the detection period according to the comparison result. In this way, it is possible to prevent the generation of condensed water on the surface of the heat dissipation flow path, and further avoid the condensed water from entering the electronic control board, resulting in a failure of the electronic control board, and improve the reliability of the operation of the electronic control board.

[0080] Figure 5 An example of the physical structure diagram of an electronic device, the electronic device can be the above-mentioned air conditioner, such as Figure 5 As shown, the electronic device may include: a processor 510, a communication interface 520, a memory 530, and a communication bus 540. Among them, the processor 510, the communication interface 520, and the memory 530 complete mutual communication through the communication bus 540. The processor 510 can call the logical instructions in the memory 530 to execute the anti-condensation control method for the radiator, and the method includes: after the air conditioner is powered on and operates, control the electronic expansion valve to operate at the maximum opening degree as the initial opening degree for a preset detection period; obtain the first temperature value and calculate the temperature difference between the first temperature value and the preset ambient temperature; the first temperature value is the detection value of the temperature sensor; compare the temperature difference with the dew point temperature, and adjust the opening degree of the electronic expansion valve and / or the detection period according to the comparison result.

[0081] In addition, when the logical instructions in the above-mentioned memory 530 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 this application, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of this application. The aforementioned 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.

[0082] On the other hand, this application also provides a computer program product. The computer program product includes a computer program stored on a computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, the computer can execute the radiator anti-condensation control method provided by the above-mentioned various methods. This method includes: after the air conditioner is powered on and running, controlling the electronic expansion valve to operate at the maximum opening degree for a preset detection period; obtaining a first temperature value and calculating the temperature difference between the first temperature value and a preset ambient temperature; the first temperature value is the detection value of the temperature sensor; comparing the temperature difference with the dew point temperature and adjusting the opening degree of the electronic expansion valve and / or the detection period according to the comparison result.

[0083] On another aspect, this application also provides a 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 radiator anti-condensation control method provided by the above-mentioned various methods. This method includes: after the air conditioner is powered on and running, controlling the electronic expansion valve to operate at the maximum opening degree for a preset detection period; obtaining a first temperature value and calculating the temperature difference between the first temperature value and a preset ambient temperature; the first temperature value is the detection value of the temperature sensor; comparing the temperature difference with the dew point temperature and adjusting the opening degree of the electronic expansion valve and / or the detection period according to the comparison result.

[0084] 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. A person of ordinary skill in the art can understand and implement it without creative labor.

[0085] 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 this 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, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit them. Although the present application 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 described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for controlling anti-condensation of a radiator, characterized in that, A control unit provided on an air conditioner; the control unit is used to control the opening degree of an electronic expansion valve on a heat dissipation pipeline; A temperature sensor is provided on the heat dissipation pipeline; The method includes: After the air conditioner is powered on and running, control the electronic expansion valve to run for a preset detection period with the initial opening degree as the maximum opening degree; Obtain a first temperature value, and calculate the temperature difference between the first temperature value and a second temperature value; the first temperature value is the detected value of the temperature sensor; the second temperature value is the set temperature of the air conditioner; Compare the temperature difference with the dew point temperature, and adjust the opening degree of the electronic expansion valve and / or the detection period according to the comparison result.

2. The method according to claim 1, wherein The comparing the temperature difference with the dew point temperature, and adjusting the opening degree of the electronic expansion valve and / or the detection period according to the comparison result includes: When the air conditioner is in a stable operation state, if the temperature difference is greater than the dew point temperature, adjust according to a first opening degree adjustment mode; Wherein, the first opening degree adjustment mode is: the greater the difference between the temperature difference and the dew point temperature, the greater the adjustment value of the opening degree of the electronic expansion valve, and the adjusted opening degree of the electronic expansion valve is less than or equal to the maximum opening degree value.

3. The method according to claim 2, wherein, The comparing the temperature difference with the dew point temperature, and adjusting the opening degree of the electronic expansion valve and the detection period according to the comparison result includes: When the air conditioner is in a stable operation state, if the temperature difference is less than or equal to the dew point temperature, reduce the maximum opening degree value according to a preset ratio, and adjust according to a second opening degree adjustment mode, and each adjustment value of the opening degree of the electronic expansion valve is less than the adjustment value of the opening degree of the electronic expansion valve in the first opening degree adjustment mode each time.

4. The method according to claim 2 or 3, characterized in that, The comparing the temperature difference with the dew point temperature, and adjusting the opening degree of the electronic expansion valve and / or the detection period according to the comparison result includes: Calculate the opening degree difference between the current opening degree of the electronic expansion valve and the opening degree before adjustment, and adjust the detection period based on the opening degree difference; Wherein, the duration indicated by the detection period is negatively correlated with the opening degree difference.

5. The method according to claim 2 or 3, characterized in that, Before the comparing the temperature difference with the dew point temperature, and adjusting the opening degree of the electronic expansion valve and / or the detection period according to the comparison result, the method further includes: Obtain multiple operating frequency values of the compressor of the air conditioner within a preset duration, and calculate the mean square deviation of the multiple operating frequency values to obtain a frequency fluctuation value; When the frequency fluctuation value is less than a preset fluctuation threshold, determine that the air conditioner is in a stable operation state.

6. The method according to claim 1, wherein The comparing the temperature difference with the dew point temperature, and adjusting the opening degree of the electronic expansion valve and / or the detection period according to the comparison result includes: When the operation mode of the air conditioner changes and the temperature difference is greater than the dew point temperature, adjust the opening degree of the electronic expansion valve to the initial value of the maximum opening degree until the temperature difference is less than a first preset temperature difference threshold; When the temperature difference is less than the preset temperature difference threshold, gradually reduce the opening degree of the electronic expansion valve until the difference between the temperature difference and the dew point temperature is less than the second preset temperature difference threshold.

7. The method according to claim 1, characterized in that Comparing the temperature difference with the dew point temperature, adjusting the opening degree of the electronic expansion valve according to the comparison result, and / or the detection period, includes: When the operating mode of the air conditioner changes and the temperature difference is less than or equal to the dew point temperature, adjust the opening degree of the electronic expansion valve to the minimum value until the magnitude relationship between the first temperature value and the second temperature value changes; When the magnitude relationship between the first temperature value and the second temperature value changes, gradually increase the opening degree of the electronic expansion valve until the temperature difference is greater than the dew point temperature.

8. A radiator anti-condensation control device, characterized in that, Applied to the control unit set on the air conditioner; the control unit is used to control the opening degree of the electronic expansion valve on the heat dissipation pipeline; A temperature sensor is provided on the heat dissipation pipeline; Includes: The control module is used to control the electronic expansion valve to operate at the maximum opening degree for a preset detection period after the air conditioner is powered on and operates; The acquisition module is used to acquire the first temperature value and calculate the temperature difference between the first temperature value and the preset ambient temperature; the first temperature value is the detection value of the temperature sensor; The control module is further used to compare the temperature difference with the dew point temperature, and adjust the opening degree of the electronic expansion valve and / or the detection period according to the comparison result.

9. An air conditioner, characterized in that, Includes a control unit and a refrigerant radiator branch; a temperature sensor is provided on the heat dissipation pipeline; the control unit includes: a memory, a processor, and a computer program stored on the memory and executable on the processor, and the processor implements the steps of the radiator anti-condensation control method according to any one of claims 1 to 7 when executing the program.

10. A computer-readable storage medium, characterized in that, A computer program is stored thereon, and when the computer program is executed by the processor, it implements the steps of the radiator anti-condensation control method according to any one of claims 1 to 7.

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