Evaporator anti-frosting control method, device and equipment based on plasma wind and storage medium

Abstract

The invention discloses an evaporator anti-frosting control method, device and equipment based on plasma wind and a storage medium. A plasma air frost prevention device is arranged on the air inlet side of the evaporator, during the working period of the evaporator, environmental data of the air inlet side of the evaporator are monitored, whether the evaporator has a frosting risk or not is judged based on the environmental data, and when it is judged that the evaporator has the frosting risk, the plasma air frost prevention device is started to generate plasma air. The air conditioner can inhibit water molecule frosting and decompose a formed frost layer, reverse circulation of a heat exchange system is not needed, the heating or refrigerating stability is improved, the service life of a compressor, a valve and other key components is prolonged, in addition, plasma air can further conduct dust removal, organic pollutant decomposition, sterilization and virus inactivation on the surface of the evaporator, and the service life of the evaporator is prolonged. The heat exchange efficiency can be improved, the operation and maintenance cost is reduced, and the application range of the heat exchange system is expanded.

Description

Technical Field

[0001] The present invention relates to heat exchange control technology, and in particular to an anti-frost control method, device, equipment and storage medium for an evaporator based on plasma wind. Background Art

[0002] A heat exchange system refers to a system that transfers heat between two different substances through a heat exchanger, which can transfer heat energy from a high-temperature substance to a low-temperature substance. For example, a heat pump system and a refrigeration system. A heat exchange system generally includes an evaporator and a condenser. The evaporator is used to absorb external heat and vaporize the refrigerant flowing through the evaporator, and the condenser is used to release heat and liquefy the refrigerant flowing through the condenser.

[0003] When a traditional heat exchange system operates in a low-temperature and high-humidity environment, the surface of the evaporator is prone to frosting, resulting in a significant decrease in heat exchange efficiency. It is necessary to frequently start the reverse cycle program. The reverse cycle will cause the heating program or the refrigeration program to be interrupted, affecting the stability of heating or refrigeration. In addition, the reverse cycle is prone to cause pipeline pressure fluctuations and reduce the service life of key components such as compressors and valves. Summary of the Invention

[0004] The present invention provides an anti-frost control method, device, equipment and storage medium for an evaporator based on plasma wind, so as to improve the stability of heating or refrigeration of the heat exchange system, extend the service life of key components such as compressors and valves, improve heat exchange efficiency, reduce operation and maintenance costs, and expand the application range of the heat exchange system.

[0005] In a first aspect, the present invention provides an anti-frost control method for an evaporator based on plasma wind. A plasma wind anti-frost device is arranged on the air inlet side of the evaporator, including:

[0006] During the operation of the evaporator, monitor the environmental data on the air inlet side of the evaporator;

[0007] Based on the environmental data, determine whether there is a frosting risk for the evaporator;

[0008] When there is a frosting risk for the evaporator, start the plasma wind anti-frost device to generate plasma wind;

[0009] When there is no frosting risk for the evaporator, maintain the closed state of the plasma wind anti-frost device.

[0010] Optionally, the environmental data includes the temperature and humidity on the air inlet side of the evaporator. Based on the environmental data, determining whether there is a frosting risk for the evaporator includes:

[0011] Judge whether the temperature on the air inlet side is less than or equal to the set temperature and whether the humidity on the air inlet side is greater than or equal to the set humidity;

[0012] When the temperature on the air inlet side is less than or equal to the set temperature and the humidity on the air inlet side is greater than or equal to the set humidity, it is determined that there is a risk of frosting on the evaporator;

[0013] When the temperature on the air inlet side is greater than the set temperature or the humidity on the air inlet side is less than the set humidity, it is determined that there is no risk of frosting on the evaporator.

[0014] Optionally, when there is a risk of frosting on the evaporator, start the plasma wind anti-frosting device to generate plasma wind, including:

[0015] Determine the frosting risk level of the evaporator based on the environmental data;

[0016] When the frosting risk level is the first level, control the plasma wind anti-frosting device to operate in the first working state. In the first working state, the operating power of the plasma wind anti-frosting device is the first set power, the air outlet speed of the plasma wind anti-frosting device is the first set speed, the first set power is less than the rated power of the plasma wind anti-frosting device, and the first set speed is less than the rated air outlet speed of the plasma wind anti-frosting device;

[0017] When the frosting risk level is the second level, control the plasma wind anti-frosting device to operate in the second working state. In the second working state, the operating power of the plasma wind anti-frosting device is the second set power, the air outlet speed of the plasma wind anti-frosting device is the second set speed, the second set power is greater than the first set power, and the second set speed is greater than the first set speed.

[0018] Optionally, during the process of controlling the plasma wind anti-frosting device to operate in the first working state, it further includes:

[0019] Obtain the temperature distribution map of the air inlet side surface of the evaporator and the wind pressure difference between the air inlet side and the air outlet side of the evaporator;

[0020] Calculate the temperature difference between two adjacent fins of the evaporator based on the temperature distribution map;

[0021] When the wind pressure difference between the air inlet side and the air outlet side of the evaporator is greater than or equal to the set wind pressure value and the temperature difference between any two adjacent fins is greater than or equal to the set temperature difference, control the plasma wind anti-frosting device to operate in the second working state.

[0022] Optionally, in the first working state, control the plasma wind anti-frosting device to operate with continuous power, and in the second working state, control the plasma wind anti-frosting device to operate with pulsed power.

[0023] Optionally, after starting the plasma wind anti-frost device to generate plasma wind, the following steps are further included:

[0024] Input the wind pressure difference between the inlet side and the outlet side of the evaporator into a pre-constructed regression model of frost layer thickness with respect to the wind pressure difference for processing to obtain the frost layer thickness;

[0025] Determine whether the frost layer thickness is greater than or equal to a preset thickness;

[0026] When the frost layer thickness is greater than or equal to the preset thickness, control the plasma wind anti-frost device to stop operating, and at the same time control the heat exchange system to start reverse cycle defrosting.

[0027] Optionally, after starting the plasma wind anti-frost device to generate plasma wind, the following steps are further included:

[0028] Obtain the ozone concentration on the outlet side of the evaporator;

[0029] Determine whether the ozone concentration is greater than or equal to a set concentration value;

[0030] When the ozone concentration is greater than or equal to the set concentration value, control the plasma wind anti-frost device to stop operating.

[0031] In a second aspect, the present invention further provides a plasma-wind-based evaporator anti-frost control device. A plasma wind anti-frost device is provided on the inlet side of the evaporator, and it includes:

[0032] An environmental data monitoring module, configured to monitor the environmental data on the inlet side of the evaporator during the operation of the evaporator;

[0033] A judgment module, configured to judge whether there is a frosting risk for the evaporator based on the environmental data;

[0034] A start module, configured to start the plasma wind anti-frost device to generate plasma wind when there is a frosting risk for the evaporator;

[0035] A state maintenance module, configured to maintain the closed state of the plasma wind anti-frost device when there is no frosting risk for the evaporator.

[0036] In a third aspect, the present invention further provides an electronic device, including:

[0037] One or more processors;

[0038] A storage device, configured to store one or more programs;

[0039] When the one or more programs are executed by the one or more processors, the one or more processors implement the plasma-wind-based evaporator anti-frost control method provided in the first aspect of the present invention.

[0040] In a fourth aspect, the present invention further provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, it implements the method for controlling anti-frosting of an evaporator based on plasma wind provided in the first aspect of the present invention.

[0041] In the method for controlling anti-frosting of an evaporator based on plasma wind provided by the present invention, a plasma wind anti-frosting device is arranged on the air inlet side of the evaporator. During the operation of the evaporator, the environmental data on the air inlet side of the evaporator is monitored, and based on the environmental data, it is determined whether there is a risk of frosting on the evaporator. When there is a risk of frosting on the evaporator, the plasma wind anti-frosting device is started to generate plasma wind. When there is no risk of frosting on the evaporator, the closed state of the plasma wind anti-frosting device is maintained. When it is determined that there is a risk of frosting on the evaporator, starting the plasma wind anti-frosting device to generate plasma wind can inhibit the frosting of water molecules and decompose the formed frost layer, without the need for reverse circulation of the heat exchange system, improving the stability of heating or cooling, and extending the service life of key components such as compressors and valves. In addition, the plasma wind can also remove dust, decompose organic pollutants, sterilize and inactivate viruses on the surface of the evaporator, which can improve the heat exchange efficiency, reduce the operation and maintenance costs, and expand the application range of the heat exchange system.

[0042] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following described drawings are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0044] Figure 1 It is a flowchart of a method for controlling anti-frosting of an evaporator based on plasma wind provided by the present invention;

[0045] Figure 2 It is a schematic structural diagram of a heat exchange system provided by the present invention;

[0046] Figure 3 It is a schematic diagram of the electrical connection relationship of the heat exchange system provided by the present invention;

[0047] Figure 4 It is a flowchart of another method for controlling anti-frosting of an evaporator based on plasma wind provided by the present invention;

[0048] Figure 5Schematic structural diagram of an evaporator anti - frosting control device based on plasma wind provided by the present invention;

[0049] Figure 6 Schematic structural diagram of an electronic device provided by the present invention.

[0050] Through the above - mentioned drawings, specific embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and written descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0051] In order to enable those skilled in the art of this technology to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0052] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above - mentioned drawings are used to distinguish similar objects, and do not necessarily need 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 invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non - exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those clearly listed steps or units, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0053] Figure 1 Flowchart of an evaporator anti - frosting control method based on plasma wind provided by the present invention. This embodiment is applicable to defrosting the evaporator in a heat exchange system. This method can be executed by the evaporator anti - frosting control device based on plasma wind provided by the present invention. This device can be implemented in software and / or hardware and is usually configured in an electronic device, such as Figure 1 As shown, the evaporator anti - frosting control method based on plasma wind includes the following steps:

[0054] S101. During the operation of the evaporator, monitor the environmental data on the air - inlet side of the evaporator.

[0055] The anti - frosting control method of the evaporator based on plasma wind is applied to a heat exchange system. Exemplarily, the heat exchange system can be a heat pump system or a refrigeration system, which is not limited in the present invention. Figure 2 It is a schematic structural diagram of a heat exchange system provided by the present invention. Figure 3 It is a schematic diagram of the electrical connection relationship of the heat exchange system provided by the present invention. As Figure 2 、 3 shown, the heat exchange system includes a plasma wind anti - frosting device 100, a compressor 210, a four - way valve 220, an evaporator 230, a throttle valve 240, a condenser 250, and a controller 260. The compressor 210 is electrically connected to the controller 260, and the plasma wind anti - frosting device 100 is arranged on the air inlet side of the evaporator 230.

[0056] The refrigerant outlet of the compressor 210 is connected to the first end D of the four - way valve 220. The second end C of the four - way valve 220 is connected to the refrigerant inlet of the condenser 250. The refrigerant outlet of the condenser 250 is connected to the refrigerant inlet of the throttle valve 240. The refrigerant outlet of the throttle valve 240 is connected to the refrigerant inlet of the evaporator 230. The refrigerant outlet of the evaporator 230 is connected to the third end E of the four - way valve 220. The fourth end S of the four - way valve 220 is connected to the refrigerant inlet of the compressor 210.

[0057] Exemplarily, during the operation of the heat exchange system, the compressor 210 compresses the refrigerant into a high - temperature gas, which is sent into the condenser 250 through the four - way valve 220. In the condenser 250, heat exchange occurs with the external fluid, the refrigerant releases heat and condenses into a liquid, and then is throttled and depressurized by the throttle valve 240 and sent into the evaporator 230. In the evaporator 230, heat exchange occurs with the external fluid, the refrigerant absorbs heat and vaporizes into a gas, and then returns to the compressor 210 through the four - way valve 220.

[0058] The plasma wind anti - frosting device 100 is arranged at the air inlet of the evaporator 230. After the air entering from the air inlet side of the evaporator 230 enters the plasma wind anti - frosting device 100, it is ionized by the plasma wind anti - frosting device 100 to generate plasma wind, and then is sent into the evaporator 230.

[0059] In the embodiment of the present invention, during the operation of the evaporator 230, the environmental data on the air inlet side of the evaporator 230 is monitored. Among them, the environmental data can include the temperature, humidity, wind speed, etc. on the air inlet side of the evaporator 230, which is not limited in the embodiment of the present invention.

[0060] S102. Judge whether there is a frosting risk for the evaporator based on the environmental data.

[0061] In the embodiment of the present invention, judge whether there is a frosting risk for the evaporator 230 based on the environmental data. If so, execute step S103; if not, execute step S104.

[0062] In some embodiments of the present invention, the environmental data includes the temperature and humidity on the air inlet side of the evaporator 230. Exemplarily, as Figure 2 , 3 shown, the heat exchange system further includes a temperature sensor 271 and a humidity sensor 272. Both the temperature sensor 271 and the humidity sensor 272 are disposed on the air inlet side of the evaporator 230, and both the temperature sensor 271 and the humidity sensor 272 are connected to the controller 260. Exemplarily, the temperature sensor 271 and the humidity sensor 272 are disposed in the central area of the surface on the air inlet side of the evaporator 230 for collecting the temperature and humidity on the air inlet side and uploading them to the controller 260. The controller 260 can determine whether there is a frosting risk for the evaporator 230 based on the real-time collected air inlet temperature and humidity.

[0063] In some embodiments of the present invention, it is determined whether the temperature on the air inlet side of the evaporator 230 is less than or equal to the set temperature, and whether the humidity on the air inlet side is greater than or equal to the set humidity. If so, there is a frosting risk. Exemplarily, the set temperature is 5 °C and the set humidity is 65%.

[0064] S103. Start the plasma wind anti-frost device to generate plasma wind.

[0065] In an embodiment of the present invention, when there is a frosting risk for the evaporator 230, the plasma wind anti-frost device 100 is started to generate plasma wind. The plasma wind blows towards the surface of the evaporator 230, which can inhibit the frosting of water molecules, decompose the formed frost layer, remove dust, and decompose organic pollutants.

[0066] Exemplarily, a high-voltage electric field can be formed inside the plasma wind anti-frost device 100. The high-voltage electric field ionizes gas molecules in the air (such as O 2 , H 2 O, N 2 etc.) to generate active particles such as high-energy electrons, ions, and free radicals. The positive and negative ions move towards the opposite poles under the action of the electric field to form ion migration and drive the neutral gas to form plasma wind.

[0067] The principle of air ionization is as follows:

[0068] Ionization of oxygen:

[0069] e - +O 2 →2O·+e -

[0070] Ionization of water molecules:

[0071] e - +H 2 O→H·+·OH+e -

[0072] Nitrogen ionization:

[0073] e - +N 2 →2N·+e -

[0074] The plasma wind blows towards the surface of the evaporator 230, which can inhibit the frosting of water molecules, decompose the formed frost layer, remove dust, and decompose organic pollutants. The specific principles are as follows:

[0075] Inhibiting the frosting of water molecules: The active particles in the plasma wind can break the hydrogen bonds of water molecules and inhibit the formation of frost crystals.

[0076] H 2 O+O·→HO 2 ·+H·

[0077] H 2 O+·OH→H 2 O 2

[0078] Among them, H 2 O 2 can accelerate the decomposition of the frost layer.

[0079] Decomposing the formed frost layer: High-energy particles impact the frost layer (solid water: H 2 O (s) ), prompting it to sublime into gaseous water (H 2 O (g) ) or decompose.

[0080] H 2 O (s) +e - →H 2 O (g) +e -

[0081]

[0082] Compared with the traditional reverse cycle defrosting method, the anti-frost control method of the present invention can defrost during the normal operation of the heat exchange system without the reverse cycle of the heat exchange system, improving the stability of heating or cooling and extending the service life of key components such as compressors and valves.

[0083] Dust removal: The plasma in the plasma wind is charged. After attaching to dust and oil mist particles, the dust and oil mist particles also become charged. Through electrostatic adsorption or ion wind guidance, the dust and oil mist particles settle, realizing the self-cleaning of the evaporator, extending the manual cleaning cycle, and reducing the operation and maintenance costs.

[0084] Decomposition of organic pollutants: Free radical chain reactions can decompose organic pollutants such as formaldehyde and grease.

[0085] ·OH + CH 2 O → HCO· + H 2 O

[0086] O· + C n H m → CO 2 + H 2 O

[0087] In addition, the plasma wind can also play a role in sterilization and virus inactivation. Specifically, oxygen atom free radicals can destroy the lipid of the bacterial cell membrane and oxidize it into lipid peroxide; hydroxyl free radicals can destroy virus RNA (ribonucleotide) and DNA (deoxyribonucleotide), thereby inactivating the genetic material of the virus.

[0088] The decomposition of organic pollutants, sterilization and virus inactivation expand the additional functions and applicable scenarios of the heat exchange system, and expand the application value of the heat exchange system in scenarios with strict requirements for the cleanliness of the outlet air, such as medical treatment, food processing, laboratories, etc.

[0089] S104. Maintain the closed state of the plasma wind anti-frost device.

[0090] In the embodiment of the present invention, when there is no frosting risk in the evaporator 230, the closed state (standby or shutdown) of the plasma wind anti-frost device 100 is maintained.

[0091] The evaporator anti-frost control method based on plasma wind provided by the present invention is provided with a plasma wind anti-frost device on the air inlet side of the evaporator. During the operation of the evaporator, the environmental data on the air inlet side of the evaporator is monitored. Based on the environmental data, it is judged whether there is a frosting risk in the evaporator. When there is a frosting risk in the evaporator, the plasma wind anti-frost device is started to generate plasma wind. When there is no frosting risk in the evaporator, the closed state of the plasma wind anti-frost device is maintained. When it is determined that there is a frosting risk in the evaporator, the plasma wind anti-frost device is started to generate plasma wind, which can inhibit the frosting of water molecules and decompose the formed frost layer, without the reverse cycle of the heat exchange system, improving the stability of heating or cooling and extending the service life of key components such as compressors and valves. In addition, the plasma wind can also remove dust, decompose organic pollutants, sterilize and inactivate viruses on the surface of the evaporator, which can improve the heat exchange efficiency, reduce the operation and maintenance cost, and expand the application range of the heat exchange system.

[0092] Figure 4 It is a flowchart of another evaporator anti-frost control method based on plasma wind provided by the present invention. As Figure 4 shown, the evaporator anti-frost control method based on plasma wind includes:

[0093] S201. During the operation of the evaporator, monitor the environmental data on the air inlet side of the evaporator.

[0094] The anti - frosting control method of the evaporator based on plasma wind is applied to a heat exchange system. Exemplarily, the heat exchange system can be a heat pump system or a refrigeration system, and the present invention does not limit this here. In the embodiments of the present invention, during the operation of the evaporator, the environmental data on the air inlet side of the evaporator is monitored. Among them, the environmental data can include the temperature, humidity, wind speed, etc. on the air inlet side of the evaporator, and the embodiments of the present invention do not limit this here.

[0095] S202. Determine whether there is a frosting risk for the evaporator based on the environmental data.

[0096] In the embodiments of the present invention, based on the environmental data, it is determined whether there is a frosting risk for the evaporator. If so, step S203 is executed; if not, step S212 is executed.

[0097] In some embodiments of the present invention, it is determined whether the temperature on the air inlet side of the evaporator is less than or equal to the first set temperature and whether the humidity on the air inlet side is greater than or equal to the first set humidity. If so, there is a frosting risk. Exemplarily, the first set temperature is 5°C and the first set humidity is 65%.

[0098] S203. Determine the frosting risk level of the evaporator based on the environmental data.

[0099] In the embodiments of the present invention, when it is determined that there is a frosting risk for the evaporator, the frosting risk level of the evaporator is further determined based on the environmental data. Exemplarily, when the temperature on the air inlet side is less than or equal to the first set temperature, greater than or equal to the second set temperature, and the humidity on the air inlet side is greater than or equal to the first set humidity and less than or equal to the second set humidity, the frosting risk level is determined to be the first level. When the temperature on the air inlet side is less than the second set temperature and the humidity on the air inlet side is greater than the second set humidity, the frosting risk level is determined to be the second level.

[0100] S204. Control the plasma wind anti - frosting device to operate in the first working state.

[0101] When the frosting risk level is the first level (i.e., the frosting risk is small), control the plasma wind anti - frosting device to operate in the first working state. In the first working state, the operating power of the plasma wind anti - frosting device is the first set power (for example, 30% - 50% of the rated power), the air outlet speed of the plasma wind anti - frosting device is the first set speed (for example, 0.8 m / s - 1.2 m / s), the first set power is less than the rated power of the plasma wind anti - frosting device, and the first set speed is less than the rated air outlet speed of the plasma wind anti - frosting device.

[0102] Exemplarily, in some embodiments of the present invention, in the first working state, control the plasma wind anti - frosting device to operate at a continuous power, and the generated plasma wind continuously sweeps the surface of the evaporator.

[0103] S205. Obtain the temperature distribution map of the air inlet side surface of the evaporator and the air pressure difference between the air inlet side and the air outlet side of the evaporator.

[0104] During the operation of the plasma wind anti-frost device in the first working state, the temperature distribution map of the air inlet side surface of the evaporator and the air pressure difference between the air inlet side and the air outlet side of the evaporator are obtained in real time.

[0105] Exemplarily, as Figure 2 、 3 shown, the heat exchange system further includes an infrared thermal imager 273. The infrared thermal imager 273 is connected to the controller 260 and is used to detect the surface temperature distribution of the air inlet side of the evaporator 230 and upload it to the controller 260. The controller 260 is based on the surface temperature distribution of the air inlet side of the evaporator 230.

[0106] As Figure 2 、 3 shown, the heat exchange system further includes a differential pressure sensor 274, which is used to detect the air pressure difference between the air inlet side and the air outlet side of the evaporator 230. The differential pressure sensor 274 includes a first sensing part 2741 and a second sensing part 2742. The first sensing part 2741 is arranged on the air inlet side of the evaporator 230, and the second sensing part 2742 is arranged on the air outlet side of the evaporator 230.

[0107] S206. Calculate the temperature difference between two adjacent fins of the evaporator based on the temperature distribution map.

[0108] In the embodiment of the present invention, the temperature difference between two adjacent fins of the evaporator is calculated based on the temperature distribution map. Specifically, based on the temperature distribution map, the temperatures of any two adjacent fins are determined, and the temperature difference between them is calculated.

[0109] S207. When the air pressure difference between the air inlet side and the air outlet side of the evaporator is greater than or equal to the set air pressure value, and the temperature difference between any two adjacent fins is greater than or equal to the set temperature difference, control the plasma wind anti-frost device to operate in the second working state.

[0110] When the air pressure difference between the air inlet side and the air outlet side of the evaporator is greater than or equal to the set air pressure value, and the temperature difference between any two adjacent fins is greater than or equal to the set temperature difference (indicating that frosting may have occurred), control the plasma wind anti-frost device to operate in the second working state. In the second working state, the operating power of the plasma wind anti-frost device is the second set power (for example, 70%-100% of the rated power), and the air outlet speed of the plasma wind anti-frost device is the second set speed (for example, 2m / s - 3m / s). The second set power is greater than the first set power, and the second set speed is greater than the first set speed.

[0111] Exemplarily, in some embodiments of the present invention, in the second operating state, the plasma wind anti-frost device is controlled to operate with pulsed power, and the generated high-concentration plasma wind impacts the frost layer.

[0112] S208. Control the plasma wind anti-frost device to operate in the second operating state.

[0113] In step S203, when it is determined that the frosting risk level is the second level (i.e., the frosting risk is relatively high), control the plasma wind anti-frost device to operate in the second operating state. The operating parameters of the second operating state are as described above, and the present invention will not elaborate herein.

[0114] S209. Input the wind pressure difference between the inlet side and the outlet side of the evaporator into the pre-constructed regression model of the frost layer thickness with respect to the wind pressure difference for processing to obtain the frost layer thickness.

[0115] During the operation of the plasma wind anti-frost device in the second operating state, input the wind pressure difference between the inlet side and the outlet side of the evaporator into the pre-constructed regression model of the frost layer thickness with respect to the wind pressure difference for processing to obtain the frost layer thickness. Exemplarily, a large amount of historical data of the wind pressure difference between the inlet side and the outlet side of the evaporator and the frost layer thickness can be collected in advance, and a regression model of the frost layer thickness with respect to the wind pressure difference can be constructed based on the historical data. Exemplarily, the thicker the frost layer thickness, the greater the wind pressure difference between the inlet side and the outlet side of the evaporator.

[0116] S210. Determine whether the frost layer thickness is greater than or equal to the preset thickness.

[0117] After determining the frost layer thickness, determine whether the frost layer thickness is greater than or equal to the preset thickness (for example, 1.5 mm).

[0118] S211. Control the plasma wind anti-frost device to stop operating, and at the same time control the heat exchange system to start reverse cycle defrosting.

[0119] When the frost layer thickness is greater than or equal to the preset thickness, it indicates that the defrosting effect of the plasma wind anti-frost device can no longer meet the defrosting requirements. Therefore, control the plasma wind anti-frost device to stop operating, and at the same time control the heat exchange system to start reverse cycle defrosting. Specifically, after the heat exchange system performs reverse cycle, the high-temperature refrigerant output by the compressor first enters the evaporator to defrost the evaporator using the high-temperature refrigerant, and then successively passes through the throttle valve, condenser, and four-way valve and returns to the compressor to complete the cycle.

[0120] When the frost layer thickness is less than the preset thickness, return to execute step S209 to continuously calculate the frost layer thickness.

[0121] S212. When there is no frosting risk in the evaporator, maintain the closed state of the plasma wind anti-frost device.

[0122] In step S202, if it is determined that there is no risk of frosting on the evaporator, the closed state (standby or shutdown) of the plasma wind anti-frost device is maintained, and the process returns to step S201 to continuously monitor the environmental data.

[0123] During the operation of the plasma wind anti-frost device, oxygen in the air is ionized, generating ozone. If the indoor ozone concentration exceeds the standard, it will cause harm to the human body. Therefore, in some embodiments of the present invention, after starting the plasma wind anti-frost device to generate plasma wind, that is, during the operation of the plasma wind anti-frost device, the ozone concentration on the air outlet side of the evaporator is obtained in real time, and it is judged whether the ozone concentration is greater than or equal to the set concentration value. When the ozone concentration is greater than or equal to the set concentration value (for example, 0.05 ppm), the operation of the plasma wind anti-frost device is controlled to stop (cut off the power supply or enter the standby state) to improve safety. Of course, in other embodiments of the present invention, an ozone filter screen can also be provided on the air outlet side of the plasma wind anti-frost device to filter ozone in the air. Exemplarily, using a catalytic filter screen containing OD-KC type or other supported manganese-based composite metal oxides can quickly catalytically decompose ozone into oxygen at room temperature.

[0124] Figure 5 FIG. 7 is a schematic structural diagram of an evaporator anti-frost control device based on plasma wind provided by the present invention. A plasma wind anti-frost device is provided on the air inlet side of the evaporator, including:

[0125] An environmental data monitoring module 301, configured to monitor the environmental data on the air inlet side of the evaporator during the operation of the evaporator;

[0126] A judgment module 302, configured to judge whether there is a risk of frosting on the evaporator based on the environmental data;

[0127] A start module 303, configured to start the plasma wind anti-frost device to generate plasma wind when there is a risk of frosting on the evaporator;

[0128] A state maintenance module 304, configured to maintain the closed state of the plasma wind anti-frost device when there is no risk of frosting on the evaporator.

[0129] In some embodiments of the present invention, the environmental data includes the temperature and humidity on the air inlet side of the evaporator, and the judgment module 302 includes:

[0130] A judgment sub-module, configured to judge whether the temperature on the air inlet side is less than or equal to the set temperature and whether the humidity on the air inlet side is greater than or equal to the set humidity;

[0131] A first risk determination sub-module, configured to determine that there is a risk of frosting on the evaporator when the temperature on the air inlet side is less than or equal to the set temperature and the humidity on the air inlet side is greater than or equal to the set humidity;

[0132] A second risk determination sub-module, configured to determine that there is no frosting risk for the evaporator when the temperature on the air inlet side is greater than a set temperature or the humidity on the air inlet side is less than a set humidity.

[0133] In some embodiments of the present invention, the startup module 303 includes:

[0134] A risk level determination sub-module, configured to determine the frosting risk level of the evaporator based on the environmental data;

[0135] A first control sub-module, configured to control the plasma wind anti-frosting device to operate in a first working state when the frosting risk level is at the first level. In the first working state, the operating power of the plasma wind anti-frosting device is a first set power, the air outlet speed of the plasma wind anti-frosting device is a first set speed, the first set power is less than the rated power of the plasma wind anti-frosting device, and the first set speed is less than the rated air outlet speed of the plasma wind anti-frosting device;

[0136] A second control sub-module, configured to control the plasma wind anti-frosting device to operate in a second working state when the frosting risk level is at the second level. In the second working state, the operating power of the plasma wind anti-frosting device is a second set power, the air outlet speed of the plasma wind anti-frosting device is a second set speed, the second set power is greater than the first set power, and the second set speed is greater than the first set speed.

[0137] In some embodiments of the present invention, the evaporator anti-frosting control device based on plasma wind further includes:

[0138] An acquisition module, configured to acquire the temperature distribution map of the air inlet side surface of the evaporator and the wind pressure difference between the air inlet side and the air outlet side of the evaporator during the process of controlling the plasma wind anti-frosting device to operate in the first working state;

[0139] A temperature difference calculation module, configured to calculate the temperature difference between two adjacent fins of the evaporator based on the temperature distribution map;

[0140] A control module, configured to control the plasma wind anti-frosting device to operate in the second working state when the wind pressure difference between the air inlet side and the air outlet side of the evaporator is greater than or equal to a set wind pressure value and the temperature difference between any two adjacent fins is greater than or equal to a set temperature difference.

[0141] In some embodiments of the present invention, in the first working state, the plasma wind anti-frosting device is controlled to operate with continuous power, and in the second working state, the plasma wind anti-frosting device is controlled to operate with pulsed power.

[0142] In some embodiments of the present invention, the evaporator frost prevention control device based on plasma wind further includes:

[0143] A frost layer thickness calculation module, configured to, after starting the plasma wind anti-frost device to generate plasma wind, input the wind pressure difference between the air inlet side and the air outlet side of the evaporator into a pre-constructed regression model of the frost layer thickness with respect to the wind pressure difference for processing to obtain the frost layer thickness;

[0144] A thickness judgment module, configured to judge whether the frost layer thickness is greater than or equal to a preset thickness;

[0145] A reverse cycle control module, configured to, when the frost layer thickness is greater than or equal to the preset thickness, control the plasma wind anti-frost device to stop operating, and at the same time control the heat exchange system to start reverse cycle defrosting.

[0146] In some embodiments of the present invention, the evaporator frost prevention control device based on plasma wind further includes:

[0147] An ozone concentration acquisition module, configured to, after starting the plasma wind anti-frost device to generate plasma wind, acquire the ozone concentration on the air outlet side of the evaporator;

[0148] A concentration judgment module, configured to judge whether the ozone concentration is greater than or equal to a set concentration value;

[0149] A stop module, configured to, when the ozone concentration is greater than or equal to the set concentration value, control the plasma wind anti-frost device to stop operating.

[0150] The above-mentioned evaporator frost prevention control device based on plasma wind can execute the evaporator frost prevention control method based on plasma wind provided in the foregoing embodiments of the present invention, and has corresponding functional modules and beneficial effects for executing the evaporator frost prevention control method based on plasma wind.

[0151] Figure 6 FIG. is a schematic structural diagram of an electronic device provided by the present invention. The electronic device is intended to represent various forms of digital computers, such as, laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as, personal digital processors, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the present invention described herein and / or claimed.

[0152] As Figure 6As shown, the electronic device includes at least one processor 11 and a memory communicatively connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc. The memory stores a computer program executable by the at least one processor. The processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 into the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0153] Multiple components in the electronic device are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a magnetic disk, an optical disc, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device to exchange information / data with other devices via a computer network such as the Internet and / or various telecommunication networks.

[0154] The processor 11 can be various general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of the processor 11 include but are not limited to a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as the evaporator anti-frost control method based on plasma wind.

[0155] In some embodiments, the evaporator anti-frost control method based on plasma wind can be implemented as a computer program tangibly embodied in a computer-readable storage medium, such as the storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed onto the electronic device via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the evaporator anti-frost control method based on plasma wind described above can be executed. Alternatively, in other embodiments, the processor 11 can be configured to execute the evaporator anti-frost control method based on plasma wind in any other appropriate manner (e.g., by means of firmware).

[0156] The various embodiments of the systems and techniques described above in this specification can be implemented in digital electronic circuitry, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on a chip (SOCs), complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include: being implemented in one or more computer programs that are executable and / or interpretable on a programmable system including at least one programmable processor, which can be a special-purpose or general-purpose programmable processor that receives data and instructions from, and transmits data and instructions to, a storage system, at least one input device, and at least one output device.

[0157] The computer program for implementing the methods of the present invention can be written in any combination of one or more programming languages. These computer programs can be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions / operations specified in the flowchart and / or block diagram to be implemented. The computer program can be executed entirely on the machine, partly on the machine, as a stand-alone software package partly on the machine and partly on a remote machine or entirely on the remote machine or server.

[0158] In the context of the present invention, a computer-readable storage medium can be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer-readable storage medium can include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. Alternatively, the computer-readable storage medium can be a machine-readable signal medium. More specific examples of the machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0159] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or a trackball) by which the user can provide input to the electronic device. Other kinds of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including acoustic input, voice input, or tactile input).

[0160] The systems and techniques described herein can be implemented in a computing system including backend components (e.g., as a data server), or a computing system including middleware components (e.g., an application server), or a computing system including frontend components (e.g., a user computer having a graphical user interface or a web browser through which the user can interact with an implementation of the systems and techniques described herein), or a computing system including any combination of such backend components, middleware components, or frontend components. The components of the system can be interconnected to each other by digital data communication in any form or medium (e.g., a communication network). Examples of communication networks include: local area network (LAN), wide area network (WAN), blockchain network, and the Internet.

[0161] A computing system can include a client and a server. The client and the server are generally remote from each other and typically interact through a communication network. The relationship between the client and the server is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or a cloud host, which is a host product in the cloud computing service system and solves the defects of difficult management and weak business scalability existing in traditional physical hosts and VPS services.

[0162] An embodiment of the present invention also provides a computer program product, including a computer program which, when executed by a processor, implements the evaporator anti-frost control method based on plasma wind provided in any embodiment of the present application.

[0163] In the process of implementing the computer program product, computer program code for performing the operations of the present invention can be written in one or more programming languages or combinations thereof. The programming languages include object-oriented programming languages such as Java, Smalltalk, C++, and also include conventional procedural programming languages such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, executed as an independent software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any type of network - including a local area network (LAN) or a wide area network (WAN) - or, alternatively, can be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0164] It should be understood that the various forms of the processes shown above can be used, steps can be reordered, added, or deleted. For example, the steps recited in the present invention can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved, and no limitation is imposed herein.

[0165] The above specific embodiments do not constitute a limitation on the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An evaporator anti-frost control method based on plasma wind, characterized in that: The air inlet side of the evaporator is provided with a plasma wind anti-frost device, including: During the operation of the evaporator, monitoring environmental data on the air inlet side of the evaporator; determining whether the evaporator has a risk of frosting based on the environmental data; When there is a risk of frost on the evaporator, starting the plasma wind anti-frost device to generate plasma wind; When there is no risk of frost on the evaporator, the plasma wind anti-frost device is maintained in a closed state.

2. The evaporator anti-frost control method based on plasma wind according to claim 1, characterized in that: The environmental data includes the temperature and humidity of the air inlet side of the evaporator, and judging whether the evaporator has a risk of frosting based on the environmental data includes: Determine whether the temperature of the air inlet side is less than or equal to a set temperature, and whether the humidity of the air inlet side is greater than or equal to a set humidity; When the temperature of the air inlet side is less than or equal to the set temperature, and the humidity of the air inlet side is greater than or equal to the set humidity, it is determined that the evaporator has a risk of frosting; When the temperature on the air inlet side is greater than a set temperature, or the humidity on the air inlet side is less than a set humidity, it is determined that there is no risk of frost on the evaporator.

3. The evaporator anti-frost control method based on plasma wind according to claim 1 or 2, characterized in that: When there is a risk of frost on the evaporator, the plasma wind anti-frost device is started to generate plasma wind, including: determining a frost risk level of the evaporator based on the environmental data; When the frost risk level is the first level, the plasma wind anti-frost device is controlled to operate in a first working state, in which the operating power of the plasma wind anti-frost device is a first set power, the air outlet speed of the plasma wind anti-frost device is a first set speed, the first set power is less than the rated power of the plasma wind anti-frost device, and the first set speed is less than the rated air outlet speed of the plasma wind anti-frost device; When the frost risk level is the second level, the plasma wind anti-frost device is controlled to operate in a second working state. In the second working state, the operating power of the plasma wind anti-frost device is a second set power, and the wind speed of the plasma wind anti-frost device is a second set speed. The second set power is greater than the first set power, and the second set speed is greater than the first set speed.

4. The evaporator anti-frost control method based on plasma wind according to claim 3 is characterized in that: In the process of controlling the plasma wind frost protection device to operate in the first working state, it also includes: Obtaining a temperature distribution diagram of the air inlet side surface of the evaporator and a wind pressure difference between the air inlet side and the air outlet side of the evaporator; Calculating the temperature difference between two adjacent fins of the evaporator based on the temperature distribution diagram; When the wind pressure difference between the air inlet side and the air outlet side of the evaporator is greater than or equal to the set wind pressure value, and the temperature difference between any two adjacent fins is greater than or equal to the set temperature difference, the plasma wind anti-frost device is controlled to operate in the second working state.

5. The evaporator anti-frost control method based on plasma wind according to claim 4, characterized in that: In the first working state, the plasma wind anti-frost device is controlled to operate with continuous power, and in the second working state, the plasma wind anti-frost device is controlled to operate with pulse power.

6. The evaporator anti-frost control method based on plasma wind according to claim 4, characterized in that: After the plasma wind anti-frost device is started to generate plasma wind, the method further includes: The wind pressure difference between the air inlet side and the air outlet side of the evaporator is input into a pre-constructed regression model of frost layer thickness with respect to wind pressure difference for processing to obtain the frost layer thickness; Determining whether the thickness of the frost layer is greater than or equal to a preset thickness; When the thickness of the frost layer is greater than or equal to a preset thickness, the plasma wind anti-frost device is controlled to stop running, and the heat exchange system is controlled to start reverse cycle defrosting.

7. The evaporator anti-frost control method based on plasma wind according to claim 1 or 2, characterized in that: After the plasma wind anti-frost device is started to generate plasma wind, the method further includes: Obtaining the ozone concentration at the air outlet side of the evaporator; Determining whether the ozone concentration is greater than or equal to a set concentration value; When the ozone concentration is greater than or equal to a set concentration value, the plasma wind anti-frost device is controlled to stop running.

8. An evaporator anti-frost control device based on plasma wind, characterized in that: The air inlet side of the evaporator is provided with a plasma wind anti-frost device, including: An environmental data monitoring module, used for monitoring environmental data of an air inlet side of the evaporator during operation of the evaporator; A judgment module, used for judging whether the evaporator has a risk of frosting based on the environmental data; A starting module, used for starting the plasma wind anti-frost device to generate plasma wind when there is a risk of frost on the evaporator; The state maintaining module is used to maintain the closed state of the plasma wind anti-frost device when there is no risk of frost on the evaporator.

9. An electronic device, characterized in that: include: one or more processors; A storage device for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the plasma wind-based evaporator anti-frost control method as described in any one of claims 1-7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the plasma wind-based evaporator anti-frost control method as described in any one of claims 1 to 7 is implemented.

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