Semiconductor condensation dehumidification device and method

Abstract

The present invention provides a semiconductor condensation dehumidification device and method, wherein the device includes a display panel and a host, and the display panel and the host are connected by a twisted pair cable; the host includes: a host module, a cooling fan and a semiconductor refrigeration sheet. The host module includes: a processing unit and a humidity sensor. The processing unit is used to calculate the mean square error value between the humidity value collected by the humidity sensor and the humidity standard value, and calculate the adjustment power according to the mean square error value and the voltage and current of the semiconductor condensation dehumidification device, and dynamically adjust the power of the semiconductor condensation dehumidification device according to the adjustment power. The present invention adopts a separate architecture design for the display panel and the host to avoid opening the cabinet door for operation and maintenance, thereby improving the execution efficiency of operation and maintenance and the safety of the switch cabinet; the semiconductor condensation dehumidification device is placed in the best working state by presetting a dynamic balance control algorithm, thereby improving the working efficiency of the semiconductor condensation dehumidification device.

Description

Technical Field

[0001] The present invention relates to the field of switch cabinet cooling and dehumidification, and in particular to a semiconductor condensation dehumidification device and method. Background Art

[0002] Switchgear is an important part of the power system protection equipment, and the good operation of this equipment directly affects the reliability of the power supply of the power grid. However, in many places, especially in southern my country, due to the humid climate and high moisture in the air, some important electrical components inside the switchgear work under high humidity all year round, which will cause metal parts to rust, which will seriously affect the service life of the equipment; and excessive humidity will reduce the insulation level of power equipment, leading to partial discharge and affecting the normal operation of the equipment, which brings great hidden dangers to the safe operation of power equipment.

[0003] To address this problem, most switch cabinets are currently equipped with corresponding dehumidifiers. Traditional dehumidifiers mainly include heating type, exhaust type, and nitrogen positive pressure dehumidification system. Although the above dehumidification systems have achieved dehumidification effects to a certain extent, they still have various disadvantages. For example, a heating dehumidifier uses a heater and other equipment to heat the humid air, causing the air temperature to rise, changing the water from liquid to gas and discharging it with the air flow, so that the relative humidity of the space decreases. However, when the external temperature suddenly drops, the water vapor will condense into water droplets and cannot play a dehumidification role. At the same time, a heating dehumidifier has another big problem: when a large current passes through the busbar inside the high-voltage cabinet, a relatively high temperature will be generated. If some cables inside the switch cabinet work at high temperatures for a long time, they will age severely and produce a relatively large partial discharge phenomenon. If a heating dehumidifier is used, it will not only fail to cool down the room, but increase the temperature inside the switch cabinet. Another traditional dehumidifier is the exhaust type dehumidifier, which introduces outdoor dry air into the room through natural ventilation or forced ventilation, and exhausts indoor humid air to reduce the air humidity in the local space. However, when the ambient humidity is high, it not only cannot solve the condensation problem caused by low temperature inside the switch cabinet, but also easily introduces dust and dirt into the cabinet, making the operating environment inside the switch cabinet even worse.

[0004] A relatively new type of dehumidifier is the semiconductor dehumidifier, which uses semiconductor refrigeration technology to lower the temperature of humid air, and then condenses water vapor into water droplets and discharges them from the switch cabinet to achieve the purpose of dehumidification. However, most semiconductor dehumidifiers on the market now have relatively simple functions, that is, they only support users to manually set the temperature and humidity values. After the settings are completed, the dehumidifier is turned on to start cooling and dehumidifying. Once the set temperature and humidity values ​​are reached, the dehumidification is turned off. Semiconductor dehumidifiers cannot achieve adaptive and automatic adjustment of the temperature inside the switch cabinet. At the same time, almost all semiconductor dehumidifiers do not have the function of network centralized control, and all use distributed control mode. In relatively large substations, when there are many switch cabinets, maintenance personnel need to open the cabinet door and set each dehumidifier one by one, which is very inefficient. Summary of the invention

[0005] The present invention aims at the shortcomings of the prior art and provides a semiconductor condensation dehumidification device and method.

[0006] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0007] A semiconductor condensation dehumidification device, comprising a display panel and a host, wherein the display panel and the host are connected via a twisted pair cable;

[0008] The host includes:

[0009] Host module;

[0010] Cooling fan;

[0011] Semiconductor refrigeration chip;

[0012] The main module includes:

[0013] Processing unit;

[0014] Humidity sensor;

[0015] A processing unit, used to calculate the adjustment power according to the acquired humidity standard value, the humidity value collected by the humidity sensor and the voltage and current of the semiconductor condensation dehumidification device in combination with a preset dynamic balance control algorithm, and dynamically adjust the power of the semiconductor condensation dehumidification device according to the adjustment power;

[0016] The preset dynamic balance control algorithm is used to calculate the mean square error value between the humidity value collected by the humidity sensor and the humidity standard value, and the adjustment power is calculated based on the mean square error value and the voltage and current of the semiconductor condensation dehumidification device.

[0017] Preferably, in the semiconductor condensation dehumidification device, the preset dynamic balance control algorithm comprises the following steps:

[0018] Obtain the humidity standard value at each moment within a preset time period;

[0019] Obtaining the humidity value collected by the humidity sensor at each moment within a preset time period, and recording it as the collected humidity value;

[0020] Calculate the mean square error between the humidity standard value and the collected humidity value at each moment within the preset time period;

[0021] Obtaining the current of the semiconductor condensation dehumidification device at each moment within a preset time period;

[0022] The power compensation factor is obtained by derivation of the mean square error value with respect to the current;

[0023] The regulating power of the semiconductor condensation dehumidification device is calculated based on the power compensation factor, voltage and current, so that the collected humidity value can be within the preset humidity standard range.

[0024] Preferably, in a semiconductor condensation dehumidification device, the host module is connected to an external centralized controller and receives a humidity standard value input by the external centralized controller;

[0025] The host module includes a temperature sensor;

[0026] The display panel includes an input unit, and the input unit is used to receive an external input humidity standard value;

[0027] The processing unit is used to calculate the adjustment power according to the humidity standard value input from the outside, the humidity value collected by the humidity sensor and the voltage and current of the semiconductor condensation dehumidification device in combination with a preset dynamic balance control algorithm, and dynamically adjust the power of the semiconductor condensation dehumidification device according to the adjustment power; or

[0028] The humidity standard value is calculated based on the humidity value collected by the humidity sensor and the preset standard value calculation algorithm. The adjustment power is calculated based on the calculated humidity standard value, the humidity value collected by the humidity sensor and the voltage and current of the semiconductor condensation dehumidification device combined with the preset dynamic balance control algorithm. The power of the semiconductor condensation dehumidification device is dynamically adjusted according to the adjustment power.

[0029] Preferably, in the semiconductor condensation dehumidification device, the preset standard value calculation algorithm comprises the following steps:

[0030] Establish a current regulation model for a semiconductor condensation dehumidification device under constant voltage, and create a refrigeration work model based on the current regulation model;

[0031] Establish a calculation model for the total work done by heat convection and heat radiation in the semiconductor condensation dehumidification device at a preset time;

[0032] Establish a calculation model for the change in enthalpy of wet air in a semiconductor condensation dehumidification device;

[0033] A relationship model between humidity value and change value of humid air enthalpy is created based on the current regulation model, the refrigeration work model, the total work calculation model and the change value calculation model, and the humidity standard value is calculated based on the relationship model.

[0034] Preferably, the semiconductor condensation dehumidification device, wherein the display panel further comprises:

[0035] first shell;

[0036] A display screen is arranged on the outer side of the first housing;

[0037] The input unit is arranged on the display screen and is used to receive the humidity standard value inputted from the outside;

[0038] The control unit is arranged inside the first housing, connected to the display screen and the input unit, and is used for receiving and processing input signals received by the input unit.

[0039] Preferably, the semiconductor condensation dehumidification device, wherein the processing unit comprises:

[0040] The wireless module is connected to the local centralized controller and is used to receive the humidity standard value input by the local centralized controller.

[0041] A processing unit, for receiving the humidity value collected by the humidity sensor, and calculating the adjustment power according to the obtained humidity standard value, the humidity value collected by the humidity sensor and the voltage and current of the semiconductor refrigeration piece in combination with a preset dynamic balance control algorithm;

[0042] The relay power control circuit is connected to the processing unit and the semiconductor cooling chip respectively, and is used to control the semiconductor cooling chip according to the adjustment power calculated by the processing unit.

[0043] Preferably, the semiconductor condensation dehumidification device, wherein the host comprises:

[0044] Semiconductor refrigeration chip;

[0045] The heat dissipation module comprises a first heat dissipation fin and a second heat dissipation fin, wherein the first heat dissipation fin and the second heat dissipation fin are closely attached to the semiconductor refrigeration fin;

[0046] Cooling fan;

[0047] The heat dissipation fan, the first heat dissipation fin, the semiconductor cooling fin and the second heat dissipation fin are arranged side by side in sequence.

[0048] Preferably, a semiconductor condensation dehumidification device, wherein the display panel and the host are connected using an RS485 twisted pair cable, the host supplies power to the display panel via the RS485 twisted pair cable, and the host is communicatively connected to the display panel via the RS485 twisted pair cable.

[0049] A semiconductor condensation dehumidification method is also provided, which is applied to the semiconductor condensation dehumidification device as described above, and the method comprises the following steps:

[0050] Collecting the humidity value in the semiconductor condensation dehumidification device and recording it as the collected humidity value;

[0051] Obtaining the voltage and current of the semiconductor condensation dehumidification device;

[0052] The mean square error between the collected humidity value and the humidity standard value is calculated, and the adjustment power is calculated based on the mean square error and the voltage and current of the semiconductor condensation dehumidification device. The power of the semiconductor condensation dehumidification device is dynamically adjusted based on the adjustment power.

[0053] A semiconductor condensation dehumidification method is also provided, wherein, in the semiconductor condensation dehumidification device as described above, the humidity standard value input by the external centralized controller is recorded as the first humidity standard value, and the humidity standard value of the external input received by the input unit is recorded as the second humidity standard value;

[0054] The method comprises the following steps:

[0055] When the processing unit receives the first humidity standard value, the processing unit sets the humidity variable value in the linked list to the first humidity standard value;

[0056] When the processing unit receives the second humidity standard value, the processing unit sets the humidity variable value in the linked list to the second humidity standard value;

[0057] When the processing unit does not receive the first humidity standard value and the second humidity standard value, the processing unit uses a preset standard value calculation algorithm to calculate a third humidity standard value, and sets the humidity variable value in the linked list to the third humidity standard value;

[0058] The processing unit starts the semiconductor cooling sheet and obtains the humidity value collected by the humidity sensor in real time, calculates the mean square error between the humidity value collected by the humidity sensor and the humidity variable value, and determines whether the mean square error exceeds a preset error value threshold;

[0059] If so, the processing unit increases the power of the semiconductor condensation dehumidification device;

[0060] If not, the processing unit reduces the power of the semiconductor condensation dehumidification device.

[0061] The present invention adopts a separate architecture design for the display panel and the host, thereby avoiding the need for maintenance personnel to open the cabinet door for operation when adjusting the temperature and humidity and inspecting, thereby improving the execution efficiency of maintenance and the safety of the switch cabinet.

[0062] By presetting the dynamic balance control algorithm, the semiconductor condensation dehumidification device is always in an optimal working state, which greatly improves the working efficiency of the semiconductor condensation dehumidification device and enhances the safety of the switch cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] The accompanying drawings are used to better understand the present solution and do not constitute a limitation of the present disclosure.

[0064] Figure 1 is a hardware schematic diagram of a display panel according to Embodiment 1 of the present disclosure;

[0065] Figure 2 is a hardware schematic diagram of a host according to the first embodiment of the present disclosure;

[0066] Figure 3 is a structural block diagram of the first embodiment of the present disclosure;

[0067] Figure 4 is a flowchart of Embodiment 3 of the present disclosure;

[0068] Figure 5 It is a flow chart of the preset dynamic balance control algorithm of the first embodiment of the present disclosure.

[0069] Figure numerals: display panel 100, surface sticker 101, display screen 102, light 103, button 104, first shell 105, first interface 106; host module 200, second shell 201, cooling fan 202, semiconductor cooling sheet 203, cooling module 204, signal power interface 205, wireless module 206, fixing seat 207. DETAILED DESCRIPTION

[0070] The present invention is further described in detail below in conjunction with embodiments. The following embodiments are for explanation of the present invention but the present invention is not limited to the following embodiments.

[0071] Embodiment 1;

[0072] A semiconductor condensation dehumidification device includes a display panel 100 and a host, wherein the display panel 100 and the host are connected via a twisted pair cable;

[0073] The host includes:

[0074] Host module 200;

[0075] Cooling fan 202;

[0076] Semiconductor cooling sheet 203;

[0077] The host module 200 includes:

[0078] Processing unit;

[0079] Humidity sensor;

[0080] The processing unit is connected to the humidity sensor and the semiconductor refrigeration sheet 203, respectively, and is used to calculate the adjustment power according to the obtained humidity standard value, the humidity value collected by the humidity sensor, and the voltage and current of the semiconductor condensation dehumidification device in combination with a preset dynamic balance control algorithm, and dynamically adjust the power of the semiconductor condensation dehumidification device according to the adjustment power;

[0081] The preset dynamic balance control algorithm is used to calculate the mean square error value between the humidity value collected by the humidity sensor and the humidity standard value, and the adjustment power is calculated based on the mean square error value and the voltage and current of the semiconductor condensation dehumidification device.

[0082] In the above embodiment, by adopting a separate architecture design for the display panel 100 and the host, it is avoided that the operation and maintenance personnel need to open the cabinet door when adjusting the temperature and humidity and inspecting, thereby improving the execution efficiency of operation and maintenance and the safety of the switch cabinet.

[0083] In the above embodiment, the following can be achieved by presetting the dynamic balance control algorithm:

[0084] The mean square error value between the humidity value collected by the humidity sensor and the humidity standard value is calculated, and the adjustment power is calculated according to the mean square error value and the voltage and current of the semiconductor condensation dehumidification device, and the power of the semiconductor condensation dehumidification device is dynamically adjusted according to the adjustment power, so that the semiconductor condensation dehumidification device adjusts the temperature and humidity inside the device where the semiconductor condensation dehumidification device is located;

[0085] Then, the power of the semiconductor condensation dehumidification device is further adjusted according to the above method based on the collected humidity value;

[0086] Thereby, the semiconductor condensation dehumidification device is always in an optimal working state, which greatly improves the intelligence level of the semiconductor condensation dehumidification device and enhances the safety of the switch cabinet.

[0087] In the above embodiment, the processing unit may be an MCU processing chip. Preferably, the MCU processing chip may integrate 128K SRAM and 256KB FLASH, and may also integrate a DSP computing unit and a TFT controller.

[0088] Furthermore, in the above embodiment, the host module 200 is connected to an external centralized controller, and is connected to the humidity standard value input by the external centralized controller;

[0089] The host module 200 includes a temperature sensor;

[0090] The display panel 100 includes an input unit, and the input unit is used to receive a humidity standard value input from the outside;

[0091] The processing unit is used to calculate the adjustment power according to the humidity standard value input from the outside, the humidity value collected by the humidity sensor and the voltage and current of the semiconductor condensation dehumidification device in combination with a preset dynamic balance control algorithm, and dynamically adjust the power of the semiconductor condensation dehumidification device according to the adjustment power; or

[0092] The humidity standard value is calculated based on the humidity value collected by the humidity sensor and the preset standard value calculation algorithm. The adjustment power is calculated based on the calculated humidity standard value, the humidity value collected by the humidity sensor and the voltage and current of the semiconductor condensation dehumidification device combined with the preset dynamic balance control algorithm. The power of the semiconductor condensation dehumidification device is dynamically adjusted according to the adjustment power.

[0093] Preferably, the input unit may be a display screen 102 with a touch input function.

[0094] Preferably, the input unit may be a display screen 102 and an input key with an input function, and the input key may be a button 104, and the button 104 is used to switch display pages and manually input humidity standard values.

[0095] In the above embodiment, by presetting the dynamic balance control algorithm, it is possible to control the semiconductor condensation and dehumidification device to perform temperature and humidity control even when there is no external input signal, thereby achieving dynamic control of the temperature and humidity inside the switch cabinet without human intervention, so that the switch cabinet is in an optimal working state, greatly improving the intelligence level of the semiconductor condensation and dehumidification device and enhancing the safety of the switch cabinet.

[0096] Furthermore, in the above embodiment, the display panel 100 and the host module 200 are connected by RS485 twisted pair cables, the host module 200 supplies power to the display panel 100 through the RS485 twisted pair cables, and the host module 200 is connected to the display panel 100 for communication through the RS485 twisted pair cables.

[0097] Preferably, the communication protocol between the host module 200 and the display panel 100 may adopt modbus-rtp.

[0098] Furthermore, in the above embodiment, if Figure 1 As shown, the display panel 100 further includes:

[0099] A first housing 105;

[0100] The display screen 102 is arranged outside the first housing 105;

[0101] The input unit is provided on the display screen 102 and is used to receive the humidity standard value inputted from the outside;

[0102] The control unit is disposed inside the first housing 105 and connected to the display screen 102 and the input unit, and is used to receive and process input signals received by the input unit.

[0103] Preferably, the control unit may also be an MCU processing chip.

[0104] Preferably, the first housing 105 may be made of aluminum.

[0105] As a preferred embodiment, Figure 1 As shown, the display panel 100 further includes:

[0106] The surface sticker 101 is arranged on the outer side of the first housing 105, and the display screen 102 is arranged on the outer surface of the surface sticker 101;

[0107] An alarm device, arranged on the outer surface of the face sticker 101, for issuing an alarm message according to the alarm data;

[0108] A button 104 is provided on the outer surface of the face sticker 101 and is used to switch display pages and manually input humidity standard values;

[0109] The control unit may also be connected to the alarm device and the button 104 for controlling the alarm device and for receiving button 104 instructions from the button 104 .

[0110] The display screen 102 can be integrated with the input unit to form a display screen 102 with a touch function, that is, the display screen 102 and the touch screen can be integrated into one, and the display screen 102 with a touch function is connected to the control unit through an SPI interface;

[0111] Preferably, the display screen 102 with touch function may be a 4-wire resistive touch screen.

[0112] Preferably, the warning device may be a speaker or a warning LED light 103 .

[0113] As a preferred embodiment, Figure 3 As shown, the display panel 100 further includes:

[0114] The first interface 106 is used to connect to the host module 200 via an RS485 twisted pair cable. The first interface 106 includes:

[0115] RS485 signal pin, connected to the control unit through RS485 communication circuit;

[0116] The power pin converts the +12V power provided by the host module 200200 into 5V and 3.3V through the DCDC voltage divider circuit.

[0117] In the above embodiments, the dehumidification device is mainly used for high and low voltage switch cabinets related to the power industry, including but not limited to: ring network cabinets, central cabinets, ring network boxes, distribution cabinets, distribution boxes, etc.

[0118] The dehumidification device adopts a separate structure, including a display panel 100 and a host, the display panel 100 and the host are connected via RS485 twisted pair cables, and the host module 200 supplies power to the display panel 100 via RS485 twisted pair cables, and the display panel 100 and the host are connected for communication via RS485 twisted pair cables.

[0119] Furthermore, in the above embodiment, the processing unit includes:

[0120] The wireless module 206 is connected to the local centralized controller and is used to receive the humidity standard value input by the local centralized controller.

[0121] The processing unit is connected to the humidity sensor and the wireless module 206 respectively, and is used to receive the humidity value collected by the humidity sensor, and calculate the adjustment power according to the obtained humidity standard value, the humidity value collected by the humidity sensor and the voltage and current of the semiconductor condensation dehumidification device in combination with a preset dynamic balance control algorithm;

[0122] The relay power control circuit is connected to the processing unit and the semiconductor refrigeration sheet 203 respectively, and is used to control the semiconductor condensation dehumidification device according to the adjustment power calculated by the processing unit.

[0123] It should be noted that the above-mentioned processing unit is connected to the temperature sensor to obtain the temperature value collected by the temperature sensor, so that when there is no humidity standard value of external input received by the centralized controller or input device, the humidity standard value can be calculated using a preset standard value calculation algorithm, wherein the temperature value collected by the temperature sensor is the current Kelvin temperature in the following formula.

[0124] In the above embodiment, the wireless module 206 can realize centralized joint control of multiple semiconductor condensation and dehumidification devices, that is, the semiconductor condensation and dehumidification devices in multiple switch cabinets can be calibrated and set at one time through the locally deployed centralized controller. At the same time, the working status of the semiconductor condensation and dehumidification devices inside all switch cabinets can also be centrally monitored through the centralized controller, which greatly improves the maintenance efficiency.

[0125] As a preferred embodiment, Figure 3 As shown, the processing unit includes:

[0126] Power interface, connected to the power supply;

[0127] Preferably, the power interface can be set to an AC interface, that is, the power supply at this time is an AC power supply;

[0128] A power conversion circuit is connected to the power interface and converts the power current into a DC power supply;

[0129] Preferably, the power conversion circuit can adopt an AC / DC+DC / DC conversion circuit, and the AC / DC+DC / DC conversion circuit supports dual power input, supporting both 110-400V, 50-60Hz AC power input and 100-400V DC power input;

[0130] and a signal power interface 205 of the display panel 100, for outputting a 12V DC power supply and an RS485 signal;

[0131] A second RS circuit is provided between the power conversion circuit and the signal power interface 205 and between the processing unit and the signal power interface 205, and is used to convert the UART TTL signal into an RS485 signal;

[0132] The power output circuit controlled by the relay can control the linear adjustment of the working power of the semiconductor condensation dehumidification device;

[0133] Processing unit, used for data acquisition, circuit control, algorithm calculation and interface display.

[0134] In the above embodiments, both the temperature sensor and the humidity sensor can be connected to the processing unit via an I2C bus.

[0135] As a preferred implementation, the temperature sensor and the temperature sensor may be integrated into one. For example, a high-precision digital humidity sensor may be directly used to simultaneously collect humidity and temperature. The use of a high-precision digital humidity sensor may improve sampling accuracy and sampling frequency.

[0136] As a preferred embodiment, Figure 2 As shown, the host module 200 includes:

[0137] Semiconductor cooling sheet 203;

[0138] The heat dissipation module 204 includes a first heat dissipation fin and a second heat dissipation fin, and the first heat dissipation fin and the second heat dissipation fin are closely attached to the semiconductor cooling fin 203;

[0139] Cooling fan 202;

[0140] The cooling fan 202, the first heat sink, the semiconductor cooling fin 203 and the second heat sink are arranged in sequence.

[0141] In the above embodiment, the size of the cooling fan 202 may be 80mmx80mmx10mm, the required voltage is 12V, the current is 1A, and it is used for exhaust and heat dissipation;

[0142] The size of the first heat sink may be 110mmx95mmx11mm;

[0143] The size of the semiconductor cooling sheet 203 can be 40mmx40mmx3mm, the required power supply is 12V DC, the rated current is 4A, and the cooling power is 36W;

[0144] The size of the second heat sink may be 80mmx75mmx7mm;

[0145] Furthermore, the first heat sink and the second heat sink may be aluminum PC plates. By using the two aluminum PC plates in conjunction with the semiconductor cooling plate 203, the efficiency of air condensation may be improved.

[0146] As a preferred embodiment, Figure 2 As shown, the host module 200 includes:

[0147] Second shell;

[0148] A fixing base 207 is provided corresponding to the second housing, and the second housing and the fixing base 207 can be assembled into a switch cabinet;

[0149] The processing unit is arranged inside the switch cabinet;

[0150] The cooling fan 202, the first heat sink, the semiconductor cooling fin 203 and the second heat sink are arranged in sequence inside the switch cabinet;

[0151] The second housing is provided with heat dissipation holes, and the heat dissipation fan 202 is disposed adjacent to the second housing.

[0152] Preferably, the second shell can be an aluminum alloy shell, and the fixing seat 207 can also be a wall-mounted fixing seat 207.

[0153] Furthermore, in the above embodiment, the preset standard value calculation algorithm includes the following steps:

[0154] Step A1, establishing a current regulation model of a semiconductor condensation dehumidification device under a constant voltage;

[0155] Specifically, the cooling power of the semiconductor refrigeration plate 203 in the semiconductor condensation dehumidification device can be set to P cold , the output control adopts the current regulation model under constant voltage, the formula is as follows:

[0156]

[0157] Among them, Pcold Used to indicate the cooling power of the semiconductor cooling piece 203;

[0158] t is used to represent unit time;

[0159] u(t) is used to represent the instantaneous voltage of the semiconductor cooling piece 203 at time t;

[0160] i(t) is used to represent the instantaneous current of the semiconductor refrigeration piece 203 at time t;

[0161] U is used to represent the average voltage from t0 to t1;

[0162] t, t1, and t0 are commonly used symbols to represent mathematical integral formulas;

[0163] In the above step A1, a cooling work model is created according to the current regulation model:

[0164] W cold =P cold T a ; (2)

[0165] Among them, W cold Used to indicate the work done by the semiconductor refrigeration piece 203;

[0166] T a Used to indicate time;

[0167] And, you can work during the working hours T a Under the condition of time, the cooling work is shown in the following formula (2). According to the above formulas (1) and (2), it can be seen that the regulated power can be obtained by controlling the output current. In order to simplify the calculation, it can be assumed that the output current is linearly controlled in the time domain.

[0168] Step A2, establishing a calculation model for the total work done by heat convection and heat radiation in the semiconductor condensation dehumidification device at a preset time, as shown in the following formula:

[0169] W1=Φ conv Ta+Φ Ther Ta; (3)

[0170] Among them, W1 is used to represent the total work done by thermal convection and thermal radiation;

[0171] Φ conv Used to express the convection coefficient;

[0172] Φ Ther Used to express thermal radiation coefficient;

[0173] For the convenience of calculation, under the condition of constant voltage power supply, it is assumed that the convection coefficient and thermal radiation coefficient change very little over time and can be ignored;

[0174] Step A3, establishing a calculation model for the change value of the enthalpy of wet air in the semiconductor condensation dehumidification device, specifically includes the following steps:

[0175] Step A31, when the semiconductor condensation dehumidification device is working T a After the time, the change in enthalpy of the wet air in the box can be calculated according to the following formula:

[0176] ΔH=W cold -W1; (4)

[0177] Among them, ΔH is used to represent the change in enthalpy of moist air;

[0178] Step A32, at T a After the moment, the enthalpy change in the box is as shown in the following formula:

[0179] H x =H1–ΔH; (5)

[0180] Among them, H1 is used to represent the initial enthalpy value of moist air;

[0181] H x Used to indicate the current enthalpy value of moist air;

[0182] Where, ΔH=m a h; (6)

[0183] Among them, m a Used to indicate the air quality in the box;

[0184] h is used to represent the enthalpy of moist air;

[0185] in,

[0186] Among them, ρ a Used to express the density of dry air;

[0187] V is used to represent the volume of air in the box;

[0188] B is used to indicate atmospheric pressure;

[0189] P s Used to indicate atmospheric pressure;

[0190] K is used to represent the corresponding current Kelvin temperature, which is the temperature value collected by the temperature sensor;

[0191] Used to indicate humidity value;

[0192] Among them, the calculation formula of dry air density derived from the ideal gas state equation is:

[0193]

[0194] Among them, ρ a Used to express the density of dry air;

[0195] Ra is used to represent the gas constant of dry air, 287 J / (kg·K);

[0196] P v Used to express water vapor partial pressure;

[0197] B is used to indicate atmospheric pressure;

[0198] K is used to indicate the corresponding current Kelvin temperature;

[0199] Among them, the calculation formula of the enthalpy value h of unit humid air is:

[0200] h=c dry t+10 -3 V(r0+c vap t); (9)

[0201] Where h is used to represent the enthalpy of moist air;

[0202] cdry is used to represent the drying coefficient;

[0203] c vap Used to express the air enthalpy coefficient;

[0204] r0 is used to represent the compensation coefficient;

[0205] V is used to represent the volume of air in the box;

[0206] t is used to represent unit time;

[0207] It should be noted that the box in the present disclosure refers to the switch cabinet where the semiconductor condensation and dehumidification device is located;

[0208] Step A4, creating a relationship model between the humidity value and the change value of the enthalpy of wet air according to the current regulation model, the refrigeration work model, the total work calculation model and the change value calculation model, and calculating the humidity standard value according to the relationship model, wherein the relationship model is shown in the following formula:

[0209]

[0210] Where Ra is used to represent the dry air gas constant of 287 J / (kg·K);

[0211] K is used to indicate the corresponding current Kelvin temperature;

[0212] t is used to indicate the current temperature in Celsius;

[0213] V is used to indicate the volume of the switchgear;

[0214] ΔH is used to indicate the current enthalpy value inside the switch cabinet;

[0215] Used to indicate the humidity standard value of the current semiconductor condensation dehumidification device.

[0216] Furthermore, in the above embodiment, the preset dynamic balance control algorithm includes the following steps:

[0217] Step B1, obtaining the humidity standard value at each moment within a preset time period, as shown in the following formula;

[0218]

[0219] In the above formula (11), j=1, 2, ..., N, which means that within the time point Ta, the time point is divided into N moments, and the number of sampled humidity values ​​at each moment is k.

[0220] Step B2, obtaining the humidity value collected by the humidity sensor at each moment within a preset time period, and recording it as the collected humidity value, as shown in the following formula;

[0221] σ j (k)=[σ1, σ2, σ3,…σ k ];(12)

[0222] In the above formula (12), j=1, 2, ..., N, which means that within the Ta period, the time point is divided into N moments, and the number of sampled humidity values ​​at each moment is k.

[0223] Step B3, calculating the mean square error between the humidity standard value and the collected humidity value at each moment within the preset time period, as shown in the following formula;

[0224]

[0225] In formula (13),

[0226] Step B4, obtaining the current of the semiconductor condensation dehumidification device at each moment within a preset time period, as shown in the following formula:

[0227] I j (k) = [i1, i2, i3, ..., i k ];(14)

[0228] Step B5, the mean square error value is derived from the current to obtain a power compensation factor, as shown in the following formula:

[0229]

[0230] In formula (15), ΔI j (k) is used to represent the power compensation factor;

[0231] Step B6, as shown in the following formula, the adjustment power of the semiconductor condensation dehumidification device is adjusted according to the power compensation factor, voltage and current, so that the collected humidity value can be within the preset humidity standard range;

[0232]

[0233] In the above embodiment, under the current limiting conditions (limiting conditions include switch cabinet volume, ambient temperature and humidity values, semiconductor refrigeration power), an adaptive preset dynamic balance control algorithm for linear current drive under constant voltage conditions is designed, such as Figure 5 As shown, the collected data of the temperature sensor and the humidity sensor are used as input values, and the minimum mean square error between the humidity standard value and the sampled humidity value is used to control the current output, and the adjustment power of the semiconductor refrigeration plate 203 is continuously adjusted and corrected (in order to simplify the calculation, we assume here that the adjustment of the output current and power belongs to a linear adjustment method within the Ta time range), so that the values ​​collected by the temperature sensor and the humidity sensor are close to the humidity standard value in the switch cabinet, so as to achieve the best refrigeration and dehumidification effect.

[0234] Embodiment 2:

[0235] A semiconductor condensation dehumidification method is also provided, which is applied to the semiconductor condensation dehumidification device as described above, and the method comprises the following steps:

[0236] Collecting the humidity value in the semiconductor condensation dehumidification device and recording it as the collected humidity value;

[0237] Obtaining the voltage and current of the semiconductor condensation dehumidification device;

[0238] The mean square error between the collected humidity value and the humidity standard value is calculated, and the adjustment power is calculated based on the mean square error and the voltage and current of the semiconductor condensation dehumidification device. The power of the semiconductor condensation dehumidification device is dynamically adjusted based on the adjustment power.

[0239] It should be noted that the various embodiments of a semiconductor condensation dehumidification method and the various embodiments of a semiconductor condensation dehumidification device are consistent and will not be described in detail here.

[0240] Embodiment three;

[0241] A semiconductor condensation dehumidification method is also provided, which is applied to the above-mentioned semiconductor condensation dehumidification device.

[0242] The humidity standard value input by the external centralized controller is recorded as the first humidity standard value, and the humidity standard value of the external input received by the input unit is recorded as the second humidity standard value;

[0243] The method comprises the following steps:

[0244] When the processing unit receives the first humidity standard value, the processing unit sets the humidity variable value in the linked list to the first humidity standard value;

[0245] When the processing unit receives the second humidity standard value, the processing unit sets the humidity variable value in the linked list to the second humidity standard value;

[0246] When the processing unit does not receive the first humidity standard value and the second humidity standard value, the processing unit uses a preset standard value calculation algorithm to calculate a third humidity standard value, and sets the humidity variable value in the linked list to the third humidity standard value;

[0247] The processing unit starts the semiconductor cooling sheet 203, and obtains the humidity value collected by the humidity sensor in real time, calculates the mean square error between the humidity value collected by the humidity sensor and the humidity variable value, and determines whether the mean square error exceeds a preset error value threshold;

[0248] If so, the processing unit increases the power of the semiconductor condensation dehumidification device;

[0249] If not, the processing unit reduces the power of the semiconductor condensation dehumidification device.

[0250] As a specific example, Figure 4 As shown, the semiconductor condensation dehumidification method specifically includes the following steps:

[0251] Step S1, starting the semiconductor condensation dehumidification device, and initializing the control unit and the processing unit;

[0252] Preferably, a power supply can be inserted to start the initialization of the control unit and the processing unit of the semiconductor condensation dehumidification device, including system initialization and initialization of various variables and linked list values;

[0253] Step S2, the processing unit queries the registration status value in the linked list, and determines whether the semiconductor condensation dehumidification device has been registered in the local centralized controller according to the registration status value;

[0254] If yes, the processing unit sends the first heartbeat packet to the local central controller;

[0255] If not, the processing unit sends a registration request to the local central controller, and modifies the registration status value in the linked list after the registration is successful, and then sends the first heartbeat packet to the local central controller;

[0256] It should be noted that a linked list is a special term in a programming language, which is equivalent to a table that can be used to store information in a programming language.

[0257] In the above step S2, the processing unit initializes the wireless module 206, queries the registration status value in the linked list, and if it has been registered in the local centralized controller, sends the first heartbeat packet after initialization to the local centralized controller. If the dehumidification device has not been registered in the centralized controller, it sends a registration message to the centralized controller. After successful registration, it modifies the registration status value of the linked list and sends the first heartbeat packet to the centralized controller.

[0258] Step S3, the processing unit enters a first timer interruption period, and determines whether a first humidity standard value sent by the local central controller is received during the first timer interruption period;

[0259] If yes, the processing unit sets the humidity variable value in the linked list to the first humidity standard value, sets the centralized control state value in the linked list to the ON state, sets the distributed control state value and the automatic dynamic balance control state value in the linked list to the OFF state, and then executes step S5;

[0260] If not, the processing unit sets the centralized control state value in the linked list to the default OFF state and executes step S4;

[0261] In the above step S3, after the initialization of the processing unit is completed, the processing unit enters the first timer interrupt and waits for the central controller to send a set value of the temperature and humidity required by the cabinet, which is the first humidity standard value. If the first humidity standard value is received, it indicates that the current dehumidification device is controlled by the central controller, and the first humidity standard value issued by the central controller replaces the humidity variable value in the linked list of the processing unit, and the central control state value in the linked list of the processing unit is set to the ON state, and the distributed control state value and the automatic dynamic balance control state value are set to OFF.

[0262] If the dehumidification device does not receive the first humidity standard value, it indicates that the current dehumidification device is not controlled by the centralized controller, and the centralized control state value in the linked list is set to the default OFF state.

[0263] Step S4, the processing unit enters the second timer interruption period, the processing unit sends a temperature and humidity setting request to the control unit, the control unit requests the user to set a second humidity standard value, and determines whether the second humidity standard value is received;

[0264] If so, the processing unit sets the humidity variable value in the linked list to the second humidity standard value, sets the distributed control state value in the linked list to the ON state, and sets the automatic dynamic balance control state value in the linked list to the OFF state;

[0265] If not, the processing unit sets the distributed control state value in the linked list to the OFF state, and sets the automatic dynamic balance control state value in the linked list to the ON state, and uses a preset standard value calculation algorithm to calculate the third humidity standard value, and sets the humidity variable value in the linked list to the third humidity standard value;

[0266] In the above step S4, if the semiconductor condensation dehumidification device is not controlled by the centralized controller, the semiconductor condensation dehumidification device will start the second timer interrupt, print information on the display screen 102, prompt the user and wait for the user to manually set the second humidity standard value on the display screen 102. If the user manually sets the second humidity standard value, then the distributed control state value in the linked list of the processing unit is set to ON (the default is OFF), and the automatic dynamic balance control state value is set to OFF (the default is ON), and the manually input second humidity standard value replaces the temperature and humidity value in the linked list of the processing unit. If the user does not manually operate within the second timer interrupt time, then the distributed control state value is set to the default OFF state, the automatic dynamic balance control state value is set to ON, and the preset standard value calculation algorithm is started, and the calculated temperature and humidity values ​​replace the temperature and humidity values ​​in the linked list of the processing unit.

[0267] Step S5, the processing unit starts the semiconductor cooling sheet 203, and obtains the temperature and humidity signals output by the humidity sensor in real time, calculates the mean square error between the temperature and humidity signals and the humidity variable value, and determines whether the mean square error exceeds a preset error value threshold;

[0268] If so, the processing unit increases the power of the semiconductor condensation dehumidification device;

[0269] If not, the processing unit reduces the power of the semiconductor condensation dehumidification device.

[0270] In the above step S5, when the semiconductor refrigeration chip 203 and the cooling fan 202 are started to start cooling and dehumidifying, the value of the humidity sensor is read in real time to determine whether the mean square error between the temperature and humidity values ​​of the sensor and the temperature and humidity values ​​in the linked list of the processing unit exceeds the threshold value. If exceeded, the output cooling power of the semiconductor refrigeration chip 203 and the power of the cooling fan 202 are increased. If less than, the output cooling power of the semiconductor refrigeration chip 203 is reduced, and the power of the cooling fan 202 is reduced.

[0271] Step S6, after the second timer interruption period ends, return to step S3.

[0272] In the above step S6, if the second timer interruption period ends, the second cycle is started, thereby continuously circulating to ensure that the cooling and dehumidifying device works around the clock without power outages.

[0273] In addition, it should be noted that the above exemplary embodiments of the present disclosure are described in conjunction with the accompanying drawings, including various details of the embodiments of the present disclosure to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Similarly, for the sake of clarity and conciseness, the description of well-known functions and structures is omitted in the above description.

Claims

1. A semiconductor condensation dehumidification device, characterized in that: It includes a display panel and a host, wherein the display panel and the host are connected via a twisted pair cable; The host comprises: Host module; Cooling fan; Semiconductor refrigeration chip; The host module comprises: Processing unit; Humidity sensor; A processing unit, configured to calculate an adjustment power according to the acquired humidity standard value, the humidity value collected by the humidity sensor, and the voltage and current of the semiconductor condensation dehumidification device in combination with a preset dynamic balance control algorithm, and dynamically adjust the power of the semiconductor condensation dehumidification device according to the adjustment power; The preset dynamic balance control algorithm is used to calculate the mean square error value between the humidity value collected by the humidity sensor and the humidity standard value, and calculate the adjustment power according to the mean square error value and the voltage and current of the semiconductor condensation dehumidification device; The preset dynamic balance control algorithm comprises the following steps: Obtain the humidity standard value at each moment within a preset time period; Obtaining the humidity value collected by the humidity sensor at each moment within the preset time period, and recording it as the collected humidity value; Calculate the mean square error between the humidity standard value and the collected humidity value at each moment within the preset time period; Obtaining the current of the semiconductor condensation dehumidification device at each moment within the preset time period; Derivative the mean square error value with respect to the current to obtain a power compensation factor; The regulating power of the semiconductor condensation dehumidification device is calculated according to the power compensation factor, the voltage and the current of the semiconductor condensation dehumidification device, so that the collected humidity value can be within the preset humidity standard range.

2. The semiconductor condensation dehumidification device according to claim 1, characterized in that: The host module is connected to an external centralized controller and receives a humidity standard value input by the external centralized controller; The host module includes a temperature sensor; The display panel includes an input unit, and the input unit is used to receive an external input humidity standard value; The processing unit is used to calculate the adjustment power according to the humidity standard value input from the outside, the humidity value collected by the humidity sensor and the voltage and current of the semiconductor condensation dehumidification device in combination with the preset dynamic balance control algorithm, and dynamically adjust the power of the semiconductor condensation dehumidification device according to the adjustment power; or The humidity standard value is calculated based on the humidity value collected by the humidity sensor and the preset standard value calculation algorithm. The adjustment power is calculated based on the calculated humidity standard value, the humidity value collected by the humidity sensor and the voltage and current of the semiconductor condensation dehumidification device and the preset dynamic balance control algorithm. The power of the semiconductor condensation dehumidification device is dynamically adjusted according to the adjustment power.

3. The semiconductor condensation dehumidification device according to claim 2, characterized in that: The preset standard value calculation algorithm comprises the following steps: Establishing a current regulation model of the semiconductor condensation dehumidification device under a constant voltage, and creating a refrigeration work model according to the current regulation model; Establishing a calculation model for the total work done by heat convection and heat radiation in the semiconductor condensation dehumidification device at a preset time; Establishing a calculation model for the change value of the enthalpy of the humid air in the semiconductor condensation dehumidification device; A relationship model between humidity value and change value of humid air enthalpy is created based on the current regulation model, the refrigeration work model, the total work calculation model and the change value calculation model, and the humidity standard value is calculated based on the relationship model.

4. The semiconductor condensation dehumidification device according to claim 2, characterized in that: The display panel further includes: first shell; A display screen is arranged on the outer side of the first housing; The input unit is arranged on the display screen and is used to receive a humidity standard value input from the outside; The control unit is arranged inside the first housing, connected to the display screen and the input unit, and is used to receive and process input signals received by the input unit.

5. The semiconductor condensation dehumidification device according to claim 1, characterized in that: The host module comprises: A wireless module connected to a local centralized controller and used to receive a humidity standard value input by the local centralized controller; A processing unit, configured to receive the humidity value collected by the humidity sensor, and calculate the adjustment power according to the humidity standard value obtained, the humidity value collected by the humidity sensor and the voltage and current of the semiconductor condensation dehumidification device in combination with a preset dynamic balance control algorithm; The relay power control circuit is connected to the processing unit and the semiconductor refrigeration chip respectively, and is used to control the semiconductor refrigeration chip according to the adjustment power calculated by the processing unit.

6. The semiconductor condensation dehumidification device according to claim 1, characterized in that: The host comprises: Semiconductor refrigeration chip; The heat dissipation module comprises a first heat dissipation fin and a second heat dissipation fin, wherein the first heat dissipation fin and the second heat dissipation fin are closely attached to the semiconductor refrigeration fin; Cooling fan; The heat dissipation fan, the first heat sink, the semiconductor cooling fins and the second heat sink are arranged side by side in sequence.

7. The semiconductor condensation dehumidification device according to claim 1, characterized in that: The display panel is connected to the host by using a RS485 twisted pair cable, the host supplies power to the display panel via the RS485 twisted pair cable, and the host is in communication connection with the display panel via the RS485 twisted pair cable.

8. A semiconductor condensation dehumidification method, characterized in that: Applied to the semiconductor condensation dehumidification device as claimed in any one of claims 1 to 7, the method comprises the following steps: Collecting and obtaining a humidity value in the semiconductor condensation dehumidification device and recording it as a collected humidity value; Obtaining the voltage and current of the semiconductor condensation dehumidification device; The mean square error value between the collected humidity value and the humidity standard value is calculated, the adjustment power is calculated according to the mean square error value and the voltage and current of the semiconductor condensation dehumidification device, and the power of the semiconductor condensation dehumidification device is dynamically adjusted according to the adjustment power.

9. A semiconductor condensation dehumidification method, characterized in that: Applied to the semiconductor condensation dehumidification device as claimed in any one of claims 1 to 3, the humidity standard value input by the external centralized controller is recorded as the first humidity standard value, and the humidity standard value of the external input received by the input unit is recorded as the second humidity standard value; The method comprises the following steps: When the processing unit receives the first humidity standard value, the processing unit sets the humidity variable value in the linked list to the first humidity standard value; When the processing unit receives the second humidity standard value, the processing unit sets the humidity variable value in the linked list to the second humidity standard value; When the processing unit does not receive the first humidity standard value and the second humidity standard value, the processing unit uses a preset standard value calculation algorithm to calculate a third humidity standard value, and sets the humidity variable value in the linked list to the third humidity standard value; The processing unit starts the semiconductor refrigeration chip, and obtains the humidity value collected by the humidity sensor in real time, calculates the mean square error value between the humidity value collected by the humidity sensor and the humidity variable value, and determines whether the mean square error exceeds a preset error value threshold; If so, the processing unit increases the power of the semiconductor condensation dehumidification device; If not, the processing unit reduces the power of the semiconductor condensation dehumidification device.

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