Heating and dehumidification control method and control terminal for electrical equipment

Abstract

The invention provides an electrical equipment heating and dehumidification control method and a control terminal. The electrical equipment heating and dehumidification control method comprises the steps that the dry-bulb temperature, the wet-bulb temperature and the current atmospheric pressure are obtained, and the current dew-point temperature is determined according to the dry-bulb temperature, the wet-bulb temperature and the current atmospheric pressure; determining a target temperature according to the dew point temperature; and controlling a heater in the electrical equipment to start until the temperature in the electrical equipment reaches the target temperature. The dew-point temperature is determined by integrating the dry-bulb temperature, the wet-bulb temperature and the current atmospheric pressure, the dew-point temperature is determined by integrating multiple factors of an application scene, then the heater is controlled according to the dew-point temperature, condensation can be effectively avoided, and the dehumidification effect is good.

Description

Technical Field

[0001] The present invention relates to the technical field of heating and dehumidification, and in particular to a heating and dehumidification control method and a control terminal for electrical equipment. Background Art

[0002] The inverter controls the power output of the AC motor by changing the frequency of the motor's working power supply. It is widely used in industrial production, construction, electricity and other industries. The application scenarios of the inverter involve different altitudes and locations, including sea and land (grassland / woodland / rainforest / desert and many other environments). When the inverter is operated in an area with heavy humidity and large temperature difference, condensation is very likely to occur inside the inverter, and its insulation performance will be greatly reduced, and it may even cause a short circuit accident. The good operating environment of the inverter plays a vital role in the safe and stable operation of power equipment. Therefore, a heating device is usually set inside the inverter to heat and dehumidify the inverter to avoid condensation.

[0003] In the prior art, a dry-bulb control strategy is usually used to control heating and dehumidification. However, the dehumidification effect of the existing control strategy is unstable in different scenarios and cannot effectively avoid condensation of the inverter. Summary of the invention

[0004] The embodiment of the present invention provides a heating and dehumidification control method and a control terminal for electrical equipment to solve the problem that the dehumidification effect of the existing dry-bulb control strategy is not good enough.

[0005] In a first aspect, an embodiment of the present invention provides a method for controlling heating and dehumidification of electrical equipment, comprising:

[0006] Obtain the dry-bulb temperature, wet-bulb temperature and current atmospheric pressure, and determine the current dew point temperature based on the dry-bulb temperature, wet-bulb temperature and current atmospheric pressure;

[0007] Determine the target temperature based on the dew point temperature;

[0008] The heater in the electrical device is controlled to turn on until the temperature in the electrical device reaches the target temperature.

[0009] In the second aspect, an embodiment of the present invention provides a control terminal, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the steps of the method for heating and dehumidification control of electrical equipment provided in the first aspect or any possible implementation method of the first aspect.

[0010] The embodiment of the present invention provides a heating and dehumidification control method and a control terminal for electrical equipment. The above-mentioned heating and dehumidification control method for electrical equipment includes: obtaining the dry-bulb temperature, the wet-bulb temperature and the current atmospheric pressure, and determining the current dew point temperature according to the dry-bulb temperature, the wet-bulb temperature and the current atmospheric pressure; determining the target temperature according to the dew point temperature; and controlling the heater in the electrical equipment to turn on until the temperature in the electrical equipment reaches the target temperature. The embodiment of the present invention takes into account specific application scenarios, comprehensively determines the dew point temperature by combining the dry-bulb temperature, the wet-bulb temperature and the current atmospheric pressure, and then controls the heater according to the dew point temperature, which can effectively avoid condensation and achieve a good dehumidification effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0012] Figure 1 is a schematic diagram of the arrangement of a heater provided by an embodiment of the present invention;

[0013] Figure 2 It is a flow chart of an implementation method of a heating and dehumidification control method for electrical equipment provided by an embodiment of the present invention;

[0014] Figure 3 is a structural schematic diagram of a heating and dehumidification control device for electrical equipment provided by an embodiment of the present invention;

[0015] Figure 4 is a schematic diagram of a control terminal provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0016] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present invention.

[0017] In order to make the purpose, technical solutions and advantages of the present invention more clear, specific embodiments will be described below in conjunction with the accompanying drawings.

[0018] A good operating environment for electrical equipment such as frequency converters plays a role in ensuring the safe and stable operation of the system. At present, the cabinet structure of electrical equipment such as frequency converters is becoming increasingly miniaturized, with compact internal structures and reduced phase-to-phase and ground distances of live parts, so the requirements for environmental factors are relatively higher. Due to the electrical operating environment, manufacturing and other reasons, especially when the water vapor is heavy and the temperature difference is large, condensation is very easy to form in the cabinet of electrical equipment. There is a great risk of insulation failure when the cabinet operates in a high humidity and high pollution environment for a long time. In a high humidity environment, the insulation performance of the air medium is greatly reduced, and at the same time, high-voltage electrodes are very prone to partial discharge in a high humidity environment; the insulation performance of solid insulating materials in a high humidity environment has changed greatly, and under the influence of partial discharge, the aging of solid insulating materials is easily accelerated, and the electrical aging and environmental aging of solid insulating materials are usually irreversible.

[0019] Therefore, heaters are usually installed inside electrical equipment to heat and dehumidify to prevent condensation on the electrical equipment.

[0020] For example, refer to Figure 1 The heater includes: a heating resistor and a fan. The control terminal determines the target temperature according to the control strategy and controls the heater to start.

[0021] In the prior art, a dry-bulb control strategy is usually used to control the heater. For example, according to the dry-bulb control strategy, the target temperature is calculated to be 23°C. When the temperature is lower than 18°C, the heater is controlled to heat, and when the temperature rises to 23°C, the heating is stopped. Combining the enthalpy-humidity diagram, it is known that under a standard atmospheric pressure of 101.325 kPa, for a dry-bulb temperature of 30°C, when the relative humidity is 75%, the dew point temperature corresponding to the relative humidity is 75%, which is 25.08°C>23°C. The target temperature is lower than the dew point temperature, and condensation cannot be prevented. In other application scenarios, the target temperature may be too high, and the heater may be overheated, resulting in a waste of resources.

[0022] Based on the above, see Figure 2 , which shows a flow chart of the implementation of the heating and dehumidification control method for electrical equipment provided by an embodiment of the present invention, and is described in detail as follows:

[0023] The above-mentioned electrical equipment heating and dehumidification control method comprises:

[0024] S101: obtaining a dry-bulb temperature, a wet-bulb temperature and a current atmospheric pressure, and determining a current dew point temperature according to the dry-bulb temperature, the wet-bulb temperature and the current atmospheric pressure;

[0025] S102: Determine the target temperature according to the dew point temperature;

[0026] S103: Controlling the heater in the electrical device to turn on until the temperature in the electrical device reaches the target temperature.

[0027] In the embodiment of the present invention, the dry-bulb temperature is not simply considered, but based on the current application scenario, multiple factors are comprehensively considered, and the dew point temperature is determined in combination with the dry-bulb temperature, the wet-bulb temperature and the current atmospheric pressure. The heater is then controlled according to the dew point temperature. The determination of the target temperature is more in line with the actual application scenario. When the heater is heated to the target temperature, condensation can be effectively avoided without causing waste of resources, thereby achieving precise control of heating and dehumidification of electrical equipment.

[0028] It should be noted that the heater may include: a heating resistor and a fan. Controlling the heater to turn on includes controlling the heating resistor to heat and simultaneously controlling the fan to turn on. The fan enhances the internal convection heat exchange of the electrical equipment through mechanical forced turbulence to reduce the internal temperature gradient and achieve uniform dehumidification.

[0029] In a possible implementation, S101 may include:

[0030] S1011: Determine the moisture content based on the dry bulb temperature, wet bulb temperature and current atmospheric pressure;

[0031] In the embodiment of the present invention, the moisture content is determined by combining the three acquired parameters.

[0032] Further, in a possible implementation manner, S1011 may include:

[0033] 1. Determine the saturated moist air pressure based on the wet bulb temperature;

[0034] 2. Determine the saturated moisture content based on the current atmospheric pressure and saturated wet air pressure;

[0035] 3. Determine the moisture content based on the dry bulb temperature, wet bulb temperature and saturated moisture content.

[0036] Specifically, in a possible implementation, determining the moisture content according to the dry-bulb temperature, the wet-bulb temperature, and the saturated moisture content may include:

[0037] (1) Determine the moisture content based on the dry-bulb temperature, wet-bulb temperature and saturated moisture content using the first formula;

[0038] The first formula may include:

[0039] W=[(2501-2.326t s )W s -1.006(tt s )] / [2501+1.86t-4.186t s ]

[0040] Among them, t s is the wet bulb temperature in °C, t is the dry bulb temperature in °C, W sIt is the saturated moisture content, and its unit is kg / w / kg.

[0041] It should be noted that 4.086 is the average specific heat of water above 0°C, and the unit is kJ / kgK; 2501 is the latent heat of vaporization of water at 0°C, and the unit is kJ / kg; 1.006 is the average constant-pressure specific heat of absolute dry air (below 200°C); 1.86 is the average constant-pressure specific heat of water, and the unit of constant-pressure specific heat is kJ / kgK.

[0042] In the embodiment of the present invention, only the case where the dry-bulb temperature is greater than 0 is considered, and the case where the dry-bulb temperature is less than 0 is not considered for the time being.

[0043] In a possible implementation, determining the saturated moisture content according to the current atmospheric pressure and the saturated humid air pressure may include:

[0044] According to the current atmospheric pressure and the saturated wet air pressure, the saturated moisture content is determined in combination with the second formula;

[0045] The second formula may include:

[0046] W s =0.621945[P ws / PP ws ]

[0047] Among them, W s is the saturated moisture content, in kg / w / kg; P ws is the saturated moist air pressure, in kPa; P is the current atmospheric pressure, in kPa.

[0048] In a possible implementation, determining the saturated moist air pressure according to the wet bulb temperature may include:

[0049] According to the wet bulb temperature, the saturated wet air pressure is determined in combination with the third formula;

[0050] The third formula may include:

[0051] P ws =[2C-B+(B 2 -4AC) 0.5 ] 4 ×p #

[0052] A=ψ 2 +n1ψ+n2

[0053] B=n3ψ 2 +n4ψ+n5

[0054] C=n6ψ 2 +n7ψ+n8

[0055] ψ=ts / T # +n9 / [(t s / T # )-n 10 ]

[0056] Among them, P ws is the saturated moist air pressure, in kPa; t s is the wet bulb temperature in °C; A, B, C, ψ are all transfer parameters, n1, n2, n3, n4, n5, n6, n7, n8, n9, n 10 、p # and T # are all constants.

[0057] Based on the above, the moisture content can be calculated by combining the first formula, the second formula and the third formula. The above calculation takes into account the influence of multiple parameters. The calculation of moisture content is more in line with the actual operation scenario of the electrical equipment, and the calculation result is more accurate.

[0058] For example, the values ​​of the above constants may be:

[0059] p # =1MPa

[0060] T # =1K

[0061] n1=0.11670521452767*10 4

[0062] n2=-0.72421316703206*10 6

[0063] n3=0.17073846940092*10 2

[0064] n4=0.12020824702470*10 5

[0065] n5=-0.32325550322333*10 7

[0066] n6=0.14915108613530*10 2

[0067] n7=0.48232657361591*10 4

[0068] n8=0.40511340542057*10 6

[0069] n9=0.23855557567849

[0070] n 10 =0.65017534844798*10 3

[0071] S1012: Determine water vapor partial pressure based on current atmospheric pressure and moisture content;

[0072] Water vapor partial pressure is used to indicate the pressure occupied by water vapor in humid air.

[0073] In a possible implementation, S1012 may include:

[0074] 1. Determine the water vapor partial pressure based on the current atmospheric pressure and moisture content and the fourth formula;

[0075] The fourth formula may include:

[0076] P w =(P×W) / (0.621945+W)

[0077] Among them, P w is the water vapor partial pressure, in kPa; P is the current atmospheric pressure, in kPa; W is the moisture content, in kg / w / kg.

[0078] S1013: Determine the dew point temperature based on the water vapor partial pressure.

[0079] The water vapor partial pressure is related to the dew point temperature. Therefore, in the embodiment of the present invention, it is more accurate to determine the dew point temperature based on the water vapor partial pressure.

[0080] In a possible implementation, S1013 may include:

[0081] 1. Determine the dew point temperature based on the water vapor partial pressure and the fifth formula;

[0082] The fifth formula may include:

[0083] t d =C 14 +C 15 a+C 16 a 2 +C 17 a 3 +C 18 P w 0.1984

[0084] a=ln P w

[0085] Among them, t d is the dew point temperature, in °C; Pw is the water vapor partial pressure in kPa; a is the transfer parameter, C 14 , C 15 , C 16 , C 17 , C 18 are all constants.

[0086] The embodiment of the present invention calculates the water vapor partial pressure based on multiple parameters, and then determines the dew point temperature based on the water vapor partial pressure. The calculation result of the dew point temperature is more accurate and more practical.

[0087] In a possible implementation, S102 may include:

[0088] S1021: Add the dew point temperature and the preset adjustment amount to obtain the target temperature;

[0089] The preset adjustment value range is 2.5°C to 5°C.

[0090] 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, which is actually the temperature at which water vapor and water reach equilibrium. When the temperature is greater than the dew point temperature, condensation will not occur; when the temperature is less than the dew point temperature, condensation will occur.

[0091] Based on the dew point temperature calculated above, in the embodiment of the present invention, a certain preset adjustment amount is added to the dew point temperature to obtain the target temperature. Figure 1 , the control terminal 3 controls the heater to heat until the target temperature is reached. If the target temperature is higher than the dew point temperature, when the heater heats the electrical equipment to the target temperature, the temperature of the electrical equipment is higher than the dew point temperature, deviates from the water vapor-liquid phase critical line, and does not condense. At the same time, since the target temperature is only 2.5℃ to 5℃ higher than the dew point temperature, it will not cause overheating and avoid waste of resources while ensuring that there will be no condensation. The control of the heater is more precise and suitable for various operating scenarios, which improves the applicability of the heating and dehumidification control method for electrical equipment.

[0092] In other embodiments, other relevant parameters may also be calculated for use in relevant analysis.

[0093] 1. Based on the altitude, determine the atmospheric pressure at the altitude.

[0094] P=P0*(1-(L*H) / T0) (g / (R*L))

[0095] Among them, H is the altitude, P is the atmospheric pressure at the altitude, Pa, P0 is the standard atmospheric pressure at sea level, about 101325 Pa., T0 is the standard temperature at sea level, about 288.15K, g is the acceleration of gravity, R is the gas constant, about 8.314 (J / (C·mol)), and L is the rate of change of temperature with altitude, about 0.0065K / m.

[0096] 2. There is another way to calculate moisture content, including:

[0097] W=0.621945[P w / (P wp -P w )]

[0098] W S =0.621945[P ws / (PP ws )]

[0099] Where W is the moisture content, the unit is kg / w / kg (water vapor / humid air); W S is the saturated moisture content, in kg / w / kg; P w is the partial pressure of water vapor, in kPa; P ws is the saturated water vapor partial pressure, in kPa.

[0100] Specifically, 18.015268 is the relative molecular mass of water; 28.966 is the relative molecular mass of air; 0.621945 is the ratio of 18.015268 to 28.966.

[0101] From this, we can also calculate the specific enthalpy, h+(W s -W)h w =h s , due to h w ≈4.168t s , then when t>0, h=1.006t+W(2501+1.86t);

[0102] When t<0, h w ≈-333.4+2.1t s ,

[0103] W=[(2830-2.4t s )W s -1.006(tt s )] / [2830+1.86t-2.1t s ]

[0104] Among them, 333.4 is the heat required to melt ice, in kJ / kg; 2.1 is the average specific heat capacity of water below 0°C, in kJ / kgK.

[0105] The control method in the above embodiment does not consider the case where t<0.

[0106] 3. Relative humidity

[0107]

[0108] in, is the relative humidity.

[0109] 4. Absolute humidity

[0110] d v =(18.015268×P w ) / (R×T)

[0111] Where T is the absolute temperature, K; R is the universal gas constant, 8314.472 J / (kmol·K).

[0112] 5. Air specific volume

[0113] v=V / M da =V / 28.966n da

[0114] P da V=n da RT

[0115] P=P da +P w

[0116] Then we can get:

[0117] v=[RT(1+1.607858W)] / 28.966P

[0118] Among them, P da is the dry air partial pressure, V is the volume of the mixed gas; n da is the number of moles of dry air.

[0119] 6. Density of moist air

[0120] ρ=(M da +M w ) / V=(1 / v)(1+W)

[0121] Where ρ is the density of moist air, M w is the molar mass of water vapor per mole.

[0122] It should be understood that the order of execution of the steps in the above embodiment does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present invention.

[0123] The following is an embodiment of the device of the present invention. For details not described in detail therein, reference may be made to the corresponding method embodiment described above.

[0124] Figure 3 The following is a schematic diagram showing the structure of a heating and dehumidification control device for electrical equipment provided by an embodiment of the present invention. For ease of explanation, only the parts related to the embodiment of the present invention are shown, which are described in detail as follows:

[0125] like Figure 3 As shown, the electrical equipment heating and dehumidification control device comprises:

[0126] The dew point temperature calculation module 21 is used to obtain the dry bulb temperature, the wet bulb temperature and the current atmospheric pressure, and determine the current dew point temperature according to the dry bulb temperature, the wet bulb temperature and the current atmospheric pressure;

[0127] A target temperature determination module 22, used to determine the target temperature according to the dew point temperature;

[0128] The heating control module 23 is used to control the heater in the electrical device to turn on until the temperature in the electrical device reaches a target temperature.

[0129] In a possible implementation, the dew point temperature calculation module 21 may include:

[0130] A moisture content determination unit, used to determine the moisture content based on the dry-bulb temperature, the wet-bulb temperature and the current atmospheric pressure;

[0131] a water vapor partial pressure determination unit, for determining the water vapor partial pressure according to the current atmospheric pressure and moisture content;

[0132] The dew point temperature determination unit is used to determine the dew point temperature according to the water vapor partial pressure.

[0133] In a possible implementation, the moisture content determination unit may be specifically used to:

[0134] 1. Determine the saturated moist air pressure based on the wet bulb temperature;

[0135] 2. Determine the saturated moisture content based on the current atmospheric pressure and saturated wet air pressure;

[0136] 3. Determine the moisture content based on the dry bulb temperature, wet bulb temperature and saturated moisture content.

[0137] In a possible implementation, determining the moisture content according to the dry-bulb temperature, the wet-bulb temperature, and the saturated moisture content may include:

[0138] Determine the moisture content based on the dry bulb temperature, wet bulb temperature and saturated moisture content using the first formula;

[0139] The first formula may include:

[0140] W=[(2501-2.326t s )W s -1.006(tt s )] / [2501+1.86t-4.186t s ]

[0141] Among them, t s is the wet bulb temperature, t is the dry bulb temperature, W s is the saturated moisture content.

[0142] In a possible implementation, determining the saturated moisture content according to the current atmospheric pressure and the saturated humid air pressure may include:

[0143] According to the current atmospheric pressure and the saturated wet air pressure, the saturated moisture content is determined in combination with the second formula;

[0144] The second formula may include:

[0145] W s =0.621945[P ws / PP ws ]

[0146] Among them, W s is the saturated moisture content, P ws is the saturated moist air pressure, and P is the current atmospheric pressure.

[0147] In a possible implementation, determining the saturated moist air pressure according to the wet bulb temperature may include:

[0148] According to the wet bulb temperature, the saturated wet air pressure is determined in combination with the third formula;

[0149] The third formula may include:

[0150] P ws =[2C-B+(B 2 -4AC) 0.5 ] 4 ×p #

[0151] A=ψ 2 +n1ψ+n2

[0152] B=n3ψ 2 +n4ψ+n5

[0153] C=n6ψ2 +n7ψ+n8

[0154] ψ=t s / T # +n9 / [(t s / T # )-n 10 ]

[0155] Among them, P ws is the saturated moist air pressure, t s is the wet bulb temperature; A, B, C, ψ are all transfer parameters, n1, n2, n3, n4, n5, n6, n7, n8, n9, n 10 、p # and T # are all constants.

[0156] In a possible implementation, the water vapor partial pressure determination unit may be specifically used to: determine the water vapor partial pressure according to the current atmospheric pressure and moisture content in combination with the fourth formula;

[0157] The fourth formula may include:

[0158] P w =(P×W) / (0.621945+W)

[0159] Among them, P w is the water vapor partial pressure, P is the current atmospheric pressure, and W is the moisture content.

[0160] In a possible implementation manner, the dew point temperature determination unit may be specifically configured to: determine the dew point temperature according to the water vapor partial pressure in combination with the fifth formula;

[0161] The fifth formula may include:

[0162] t d =C 14 +C 15 a+C 16 a 2 +C 17 a 3 +C 18 P w 0.1984

[0163] a=ln P w

[0164] Among them, t d is the dew point temperature, P w is the water vapor partial pressure, a is the transfer parameter, C 14 , C 15 , C 16 , C 17 , C18 are all constants.

[0165] In a possible implementation, the target temperature determination module 22 may be specifically configured to: add the dew point temperature to a preset adjustment amount to obtain a target temperature;

[0166] The preset adjustment value may range from 2.5°C to 5°C.

[0167] Figure 4 Schematic diagram of the control terminal 3 provided in the embodiment of the present invention. Figure 4 As shown, the control terminal 3 of this embodiment includes: a processor 30 and a memory 31. The memory 31 is used to store a computer program 32, and the processor 30 is used to call and run the computer program 32 stored in the memory 31 to execute the steps in the above-mentioned various electrical equipment heating and dehumidification control method embodiments, such as Figure 2 Alternatively, the processor 30 is used to call and run the computer program 32 stored in the memory 31 to implement the functions of each module / unit in the above-mentioned device embodiments, such as Figure 3 The functions of modules 21 to 23 are shown.

[0168] Exemplarily, the computer program 32 may be divided into one or more modules / units, one or more modules / units are stored in the memory 31 and executed by the processor 30 to implement the present invention. One or more modules / units may be a series of computer program instruction segments capable of implementing specific functions, and the instruction segments are used to describe the execution process of the computer program 32 in the control terminal 3. For example, the computer program 32 may be divided into Figure 3 Modules / units 21 to 23 are shown.

[0169] The control terminal 3 may be a computing device such as a desktop computer, a notebook, a PDA, or a cloud server. The control terminal 3 may include, but is not limited to, a processor 30 and a memory 31. Those skilled in the art will appreciate that Figure 4 It is only an example of the control terminal 3 and does not constitute a limitation on the control terminal 3. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the terminal may also include input and output devices, network access devices, buses, etc.

[0170] The processor 30 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0171] The memory 31 may be an internal storage unit of the control terminal 3, such as a hard disk or memory of the control terminal 3. The memory 31 may also be an external storage device of the control terminal 3, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the control terminal 3. Further, the memory 31 may also include both an internal storage unit of the control terminal 3 and an external storage device. The memory 31 is used to store computer programs and other programs and data required by the terminal. The memory 31 may also be used to temporarily store data that has been output or is to be output.

[0172] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0173] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0174] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0175] In the embodiments provided by the present invention, it should be understood that the disclosed devices / terminals and methods can be implemented in other ways. For example, the device / terminal embodiments described above are only schematic, for example, the division of modules or units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0176] 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 on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0177] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0178] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. Computer-readable media may include: any entity or device capable of carrying computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal and software distribution medium, etc.

[0179] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention.

Claims

1. A method for controlling heating and dehumidification of electrical equipment, characterized in that: include: Acquire the dry-bulb temperature, the wet-bulb temperature and the current atmospheric pressure, and determine the current dew point temperature according to the dry-bulb temperature, the wet-bulb temperature and the current atmospheric pressure; Determining a target temperature according to the dew point temperature; A heater in the electrical device is controlled to turn on until the temperature in the electrical device reaches the target temperature.

2. The method for controlling heating and dehumidification of electrical equipment according to claim 1, characterized in that: Determining the current dew point temperature according to the dry-bulb temperature, the wet-bulb temperature and the current atmospheric pressure includes: determining moisture content based on the dry-bulb temperature, the wet-bulb temperature, and the current atmospheric pressure; determining a water vapor partial pressure based on the current atmospheric pressure and the moisture content; Based on the water vapor partial pressure, the dew point temperature is determined.

3. The electrical equipment heating and dehumidification control method according to claim 2, characterized in that: Determining the moisture content according to the dry-bulb temperature, the wet-bulb temperature and the current atmospheric pressure includes: determining the saturated moist air pressure based on the wet bulb temperature; Determining saturated moisture content according to the current atmospheric pressure and the saturated humid air pressure; The moisture content is determined based on the dry-bulb temperature, the wet-bulb temperature, and the saturated moisture content.

4. The method for controlling heating and dehumidification of electrical equipment according to claim 3, characterized in that: Determining the moisture content according to the dry-bulb temperature, the wet-bulb temperature and the saturated moisture content includes: Determining the moisture content according to the dry-bulb temperature, the wet-bulb temperature and the saturated moisture content in combination with a first formula; The first formula includes: W=[(2501-2.326t s )W s -1.006(t-t s )] / [2501+1.86t-4.186t s ] Among them, t s is the wet bulb temperature, t is the dry bulb temperature, W s is the saturated moisture content.

5. The method for controlling heating and dehumidification of electrical equipment according to claim 3, characterized in that: The determining of the saturated moisture content according to the current atmospheric pressure and the saturated humid air pressure comprises: Determine the saturated moisture content according to the current atmospheric pressure and the saturated wet air pressure in combination with a second formula; The second formula includes: W s =0.621945[P ws / P-P ws ] Among them, W s is the saturated moisture content, P ws is the saturated moist air pressure, and P is the current atmospheric pressure.

6. The method for controlling heating and dehumidification of electrical equipment according to claim 3, characterized in that: Determining the saturated moist air pressure according to the wet bulb temperature comprises: Determine the saturated wet air pressure according to the wet bulb temperature in combination with a third formula; The third formula includes: P ws =[2C-B+(B 2 -4AC) 0.5 ] 4 ×p # A=ψ 2 +n1ψ+n2 B=n3ψ 2 +n4ψ+n5 C=n6ψ 2 +n7ψ+n8 ψ=t s / T # +n9 / [(t s / T # )-n 10 ] Among them, P ws is the saturated moist air pressure, t s is the wet bulb temperature; A, B, C, ψ are all transfer parameters, n1, n2, n3, n4, n5, n6, n7, n8, n9, n 10 、p # and T # are all constants.

7. The method for controlling heating and dehumidification of electrical equipment according to claim 2, characterized in that: The determining of the water vapor partial pressure according to the current atmospheric pressure and the moisture content comprises: Determine the water vapor partial pressure according to the current atmospheric pressure and the moisture content in combination with a fourth formula; The fourth formula includes: P w =(P×W) / (0.621945+W) Among them, P w is the water vapor partial pressure, P is the current atmospheric pressure, and W is the moisture content.

8. The method for controlling heating and dehumidification of electrical equipment according to claim 2, characterized in that: Determining the dew point temperature according to the water vapor partial pressure includes: Determine the dew point temperature according to the water vapor partial pressure in combination with the fifth formula; The fifth formula includes: a=lnP Among them, t d is the dew point temperature, P w is the water vapor partial pressure, a is the transfer parameter, C 14 , C 15 , C 16 , C 17 , C 18 are all constants.

9. The method for controlling heating and dehumidification of electrical equipment according to any one of claims 1 to 8, characterized in that: Determining the target temperature according to the dew point temperature includes: Adding the dew point temperature to a preset adjustment amount to obtain the target temperature; The preset adjustment value ranges from 2.5°C to 5°C.

10. A control terminal, characterized in that: It comprises a processor and a memory, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the steps of the electrical equipment heating and dehumidification control method as described in any one of claims 1 to 9.

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