CN218822485U - CO based on automatic heating dew removal 2 Temperature and humidity three-in-one sensor - Google Patents
CO based on automatic heating dew removal 2 Temperature and humidity three-in-one sensor Download PDFInfo
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- CN218822485U CN218822485U CN202222095559.XU CN202222095559U CN218822485U CN 218822485 U CN218822485 U CN 218822485U CN 202222095559 U CN202222095559 U CN 202222095559U CN 218822485 U CN218822485 U CN 218822485U
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Abstract
The utility model provides a CO based on self-heating removes dew 2 Temperature and humidity three-in-one sensor, belonging to the technical field of data detection and being used for removing dew based on automatic heating 2 Temperature and humidity three-in-one sensorComprises a main control unit, a power supply module, a communication module, a sensor module, a dew removing module and a waterproof box, wherein the main control unit, the power supply module and the communication module are arranged in the waterproof box and are arranged in CO 2 Plastic shells are arranged outside the sensor and the temperature and humidity sensor, so that the problems of rusting and damage of components in a high-humidity environment are solved; the main control unit is electrically connected with the sensor module and the dew removing module, can analyze data collected by the sensor module in real time, is matched with the dew removing module to perform real-time dew removing treatment, and solves the problem that CO is generated after the sensor dews in a high-humidity environment 2 Inaccurate concentration and humidity; CO is introduced into 2 The sensor and the temperature and humidity sensor are separated, heating and dew removal are not interfered with each other, and the accuracy of data and the reliability of equipment linkage are ensured.
Description
Technical Field
The utility model belongs to the technical field of data detection, particularly, relate to a CO based on self-heating removes dew 2 Temperature and humidity three-in-one sensor.
Background
With the continuous development of intelligent agriculture, the demand for sensor products in agricultural planting is more and more increased, and the most relevant major elements for crop growth are water, temperature and CO respectively 2 Concentration, so the most commonly used sensors for plant height correlation in agricultural planting are the temperature and humidity sensors, CO 2 The sensor, the illuminance sensor and the like are used for judging whether each element in the plant growth environment is appropriate or not and whether the growth of crops is facilitated or not, and if the elements have problems, measures can be taken in time to ensure the normal growth of the crops.
At present, CO is present 2 The sensor, temperature and humidity sensor mainly uses in the non-dewfall environment, can detect CO under the non-dewfall environment 2 Concentration, temperature and humidity value, and under the environment that can dewfall such as high humidity, big green house of difference in temperature, mushroom case breed, the dewfall can lead to sensor air permeable membrane to block, unable normal work, and detection numerical value is inaccurate, and humidity can be in 100% state always, carries the judgement information of giving other intelligent equipment mistakes, leads to other equipment can't be according to appointed logic operation, causes crops to reduce production or die.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a CO based on self-heating removes dew 2 A temperature and humidity three-in-one sensor, which aims at solving the problem of the existing CO 2 The temperature and humidity three-in-one sensor has the problems that components are easy to rust in a high-humidity environment, the measurement result is inaccurate due to the fact that the temperature and humidity three-in-one sensor does not have an automatic dew removing function, and the linkage of equipment is poor.
The utility model discloses a realize like this:
the utility model provides a CO based on self-heating removes dew 2 The temperature and humidity three-in-one sensor comprises a main control unit, a power supply module, a communication module, a sensor module and a dew removing module;
the main control unit is electrically connected with the power supply module, the communication module, the sensor module and the dew removing module, and is used for receiving information, analyzing and logically configuring the information, and removing dew and preventing dew through the dew removing module;
the power supply module is electrically connected with the main control unit, the communication module, the sensor module and the dew removal module and is used for supplying power to components connected with the power supply module;
one end of the communication module is connected with the communication interface of the main control unit, and the other end of the communication module is connected with the gateway through a 485 line, so that the communication between the main unit and the platform is realized in a 485 communication mode;
the sensor module comprises CO 2 Sensor and temperature and humidity sensor for measuring environmental CO 2 The concentration and the temperature and the humidity are transmitted to the main control unit through an interface;
the dew removing module comprises a control unit and a dew removing device, wherein the control unit is used for being matched with the main control unit to carry out on-off heating control on the dew removing device.
The utility model provides a pair of CO based on self-heating removes dew 2 The technical effects of the temperature and humidity three-in-one sensor are as follows: the main control unit is electrically connected with the sensor module and the dew removing module, so that the main control unit can analyze the data collected by the sensor module in real time and is matched with the dew removing module,real-time dew removal treatment is carried out to solve CO generated after the sensor is dewed in a high humidity environment 2 Inaccurate concentration and humidity; by introducing CO 2 The sensor and the temperature and humidity sensor are separated, heating and dew removal are not interfered with each other, and the accuracy of data acquisition of the sensor and the reliability of equipment linkage are ensured.
On the basis of the technical scheme, the utility model discloses a CO based on self-heating removes dew 2 The temperature and humidity three-in-one sensor can be further improved as follows:
the power supply module is externally connected with 12V direct-current voltage.
Further, the power module comprises two DCDC conversion chips for converting a voltage of 12V into a voltage of 3.3V and a voltage of 5V to supply power to the communication module and the dew removal module.
Furthermore, the power module further comprises an LDO conversion chip for converting a voltage of 5V into a voltage of 3.3V to supply power to the main control unit and the sensor module.
The communication module converts a serial port of the main control unit into a 485 bus interface by using a 485 chip and is used for being connected with the platform gateway.
Wherein the sensor module further comprises a pull-up resistor and a filter capacitor.
Wherein, CO 2 And data of the sensor and the temperature and humidity sensor chip are sent to the main control unit through a 12C bus interface.
The dew removing devices are PI heating films, the number of the dew removing devices is 2, the dew removing devices are respectively arranged on the inner wall of the end part of the plastic shell and the support frame, and the CO is heated by the CO 2 The sensor with temperature and humidity sensor parcel is lived.
The beneficial effect who adopts above-mentioned improvement scheme does: by arranging the dew removing device at the CO 2 The inner wall of the end part of the sensor and the support frame of the vent hole are convenient for the CO treatment 2 The sensor and the temperature and humidity sensor perform real-time dew removal treatment, so that the accuracy of data acquisition of the sensor is improved.
Wherein, still include waterproof box, master control unit, instituteThe power module and the CO 2 The sensor is located inside the waterproof box, the communication module and the temperature and humidity sensor are arranged on the side wall of the waterproof box, and the CO is 2 The sensor and the temperature and humidity sensor are provided with a plastic shell, and the plastic shell is covered with a hydrophobic membrane.
The beneficial effect who adopts above-mentioned improvement scheme does: through the scheme, the problem that components and parts rust, damage under the high-humidity environment is solved, and water drops on the plastic shell can be quickly discharged by arranging the hydrophobic membrane, so that the service life of equipment is effectively prolonged.
The waterproof box is provided with a ventilation hole, the ventilation hole is provided with a support frame, and the waterproof box and the ventilation hole are both covered with a hydrophobic membrane.
The beneficial effect who adopts above-mentioned improvement scheme does: the ventilation hole is used for exchanging the waterproof box with the outside air, so that CO in the waterproof box 2 The sensor can detect CO in the outside air 2 The concentration of (2).
Compared with the prior art, the utility model provides a pair of CO based on self-heating removes dew 2 The beneficial effect of humiture trinity sensor is: on the one hand, the main control unit is electrically connected with the sensor module and the dew removing module, so that the main control unit can analyze data collected by the sensor module in real time, the data are matched with the dew removing module to perform real-time dew removing treatment, and CO after dew condensation of the sensor under a high humidity environment is solved 2 Inaccurate concentration and humidity; in a second aspect, by reacting CO 2 The sensor and the temperature and humidity sensor are separated, heating dew removal is not interfered with each other, and the accuracy of data acquisition of the sensor and the reliability of equipment linkage are ensured; in a third aspect, the main control unit, the power module and the communication module are arranged inside the waterproof box and in the CO 2 The plastic shell is arranged outside the sensor and the temperature and humidity sensor, so that the problems of rusting and damage of components and parts in a high-humidity environment are solved, and the hydrophobic membrane is arranged on the protective shell and the waterproof box, so that water drops formed by dew can be quickly discharged.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is CO based on automatic heating dew removal 2 The temperature and humidity three-in-one sensor is electrically connected with the schematic diagram;
FIG. 2 is CO based on automatic heating dew removal 2 The appearance schematic diagram of the temperature and humidity three-in-one sensor;
FIG. 3 is a schematic diagram of CO removal based on self-heating 2 A top view section of a waterproof box of the temperature and humidity three-in-one sensor;
FIG. 4 is CO based on self-heating dew removal 2 A PCB shell section of a temperature and humidity sensor of the temperature and humidity three-in-one sensor;
FIG. 5 is a schematic diagram of CO removal based on self-heating 2 A power input schematic diagram of the temperature and humidity three-in-one sensor;
FIG. 6 is CO based on self-heating dew removal 2 A schematic diagram of a main control template of the temperature and humidity three-in-one sensor;
FIG. 7 is CO based on self-heating dew removal 2 A schematic diagram of converting 12V voltage of a power supply of the temperature and humidity three-in-one sensor into 3.3V voltage;
FIG. 8 is CO based on self-heating dew removal 2 A schematic diagram of converting 12V voltage of a power supply of a temperature and humidity three-in-one sensor into 5V voltage;
FIG. 9 is CO based on self-heating dew removal 2 A schematic diagram of converting 5V voltage of a power supply of a temperature and humidity three-in-one sensor into 3.3V voltage;
FIG. 10 shows CO based on self-heating dew removal 2 An RS485 schematic diagram of a temperature and humidity three-in-one sensor;
FIG. 11 is a schematic representation of CO dew removal based on self-heating 2 CO of temperature and humidity three-in-one sensor 2 A sensor schematic;
FIG. 12 is a drawing showingCO based on automatic heating dew removal 2 CO of temperature and humidity three-in-one sensor 2 A sensor heating schematic;
FIG. 13 is a schematic representation of CO dew removal based on self-heating 2 A temperature and humidity sensor heating schematic diagram of the temperature and humidity three-in-one sensor;
FIG. 14 is CO based on self-heating dew removal 2 A temperature and humidity sensor interface schematic diagram of the temperature and humidity three-in-one sensor;
in the drawings, the components represented by the respective reference numerals are listed below:
1. a main control unit; 2. a power supply module; 3. a communication module; 4. a sensor module; 41. CO 2 2 A sensor; 42. a temperature and humidity sensor; 5. a dew removal module; 51. a control unit; 52. a dew removing device; 6. a waterproof box; 61. a vent hole; 611. a support frame.
Detailed Description
To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
As shown in FIG. 1 and FIGS. 5-14, the present invention provides a CO based on automatic heating dew removal 2 The first embodiment of the three-in-one temperature and humidity sensor comprises a main control unit 1, a power module 2, a communication module 3, a sensor module 4 and a dew removing module 5;
the main control unit 1 is electrically connected with the power module 2, the communication module 3, the sensor module 4 and the dew removal module 5, and is used for receiving information, analyzing and logically configuring the information, and removing dew and preventing dew removal through the dew removal module 5;
the power supply module 2 is electrically connected with the main control unit 1, the communication module 3, the sensor module 4 and the dew removal module 5 and is used for supplying power to the components connected with the power supply module;
one end of the communication module 3 is connected with the communication interface of the main control unit 1, and the other end is connected with the gateway through a 485 line, so that the communication between the main unit and the platform is realized in a 485 communication mode;
the sensor module 4 comprises CO 2 A sensor 41 and a temperature and humidity sensor 42 for measuring the ambient CO 2 The concentration and the temperature and humidity are transmitted to the main control unit 1 through the interface;
the dew removing module 5 comprises a control unit 51 and a dew removing device 52, wherein the control unit 51 is used for matching with the main control unit 1 to perform on-off heating control on the dew removing device 52.
When the device is used, the device is firstly placed in an environment to be tested, an external power supply of the power module 2 supplies power to other parts, and CO 2 Sensor 41 and temperature/humidity sensor 42 for CO in air 2 The concentration, the temperature and the humidity are subjected to real-time data acquisition, the acquired data are synchronously sent to the main control unit 1 through the 12C bus interface, the main control unit 1 uploads the received data to the platform through the communication module 3, and the CO is subjected to CO (carbon monoxide) processing 2 Analyzing the data of the sensor 41 and the temperature and humidity sensor 42, logically configuring, if the data analysis shows that the dew condensation exists on the current sensor module 4, performing dew condensation removing treatment on the dew condensation removing module 5 by the main control unit 1 through GPIO (general purpose input/output), and removing CO 2 Dew on the sensor 41 and the temperature and humidity sensor 42 is treated, and accuracy of data collected by the sensors is guaranteed.
The main control unit 1 is an ES8P5066 produced by Shanghai east soft Carrier microelectronics Limited, is a high-performance low-energy consumption 32-bit general microcontroller with an ARM Cortex-M0 CPU core, has a clock of 48MHZ 64KB flash and 4KB RAM at most, has rich interfaces and is calibrated.
Wherein, CO 2 The sensor 41 can adopt SCD41-D-R1 produced by Shenzhen Shengmury Chuang technology Limited, the working voltage is 3.6V, the working current is 0.5mA, and the measuring range is 400-5000ppm; the temperature/humidity sensor 42 may be HIH6130-021-001 manufactured by Hangzhou Kovo electronics Co.
In the above technical solution, the power module 2 is externally connected with a 12V dc voltage.
The DCDC converter is a switching power supply chip, and refers to a device that utilizes the energy storage characteristics of capacitors and inductors, and is implemented by a controllable switch, for example: the MOSFET, etc., performs a high frequency switching operation to store input electric energy in a capacitor or an inductor, and when the switch is turned off, the electric energy is released to a load to supply energy.
Further, in the above technical solution, the power module 2 includes two DCDC conversion chips, and is configured to convert a 12V voltage into a 3.3V voltage and a 5V voltage, and supply power to the communication module 3 and the dew removal module 5.
The DC/DC converter is a switching power supply chip, which utilizes the energy storage characteristics of a capacitor and an inductor to perform the action of high-frequency switching through a controllable switch (MOSFET, and the like), so as to store the input electric energy in the capacitor (inductor), and when the switch is switched off, the electric energy is released to a load to provide energy
Further, in the above technical solution, the power module 2 further includes an LDO conversion chip, which is used for converting a voltage of 5V into a voltage of 3.3V to supply power to the main control unit 1 and the sensor module 4.
An LDO is a linear regulator that uses a transistor or Field Effect Transistor (FET) operating in its saturation region to subtract excess voltage from the applied input voltage to produce a regulated output voltage.
In the above technical solution, the communication module 3 converts the serial port of the main control unit 1 into a 485 bus interface by using a 485 chip, and is used for connecting with the platform gateway.
During the use, main control unit 1 passes through the serial ports and is connected with the 485 chip, turns into the RS485 signal, is connected with the platform gateway through the 485 line, carries out the transmission of data acquisition.
The communication module 3 may be BL3085A (H) manufactured by shanghai beiling gmbh, and its operating voltage range is 4V to 9V.
In the above technical solution, the sensor module 4 further includes a pull-up resistor and a filter capacitor.
The pull-up resistor is used for pulling up an uncertain signal at a high level through a resistor, the resistor plays a role in current limiting at the same time, and the pull-up resistor mainly has the function of outputting a current channel for a collector open-circuit output type circuit; the filter capacitor is an energy storage device which is arranged at two ends of the rectifying circuit and used for reducing the alternating current ripple coefficient and improving the high-efficiency smooth direct current output.
Wherein, in the technical scheme, CO 2 Data of the sensor 41 and the temperature and humidity sensor 42 are sent to the main control unit 1 through an I2C bus interface.
The I2C bus is a simple, bidirectional synchronous serial bus, and only two lines, i.e., a data line SDA and a clock line SCL, are needed to transmit information between devices connected to the bus.
In the above technical solution, as shown in fig. 3-4, the dew removing device 52 is a PI heating film, the number of dew removing devices 52 is 2, and the devices are respectively disposed on the inner wall of the end of the plastic shell and the support frame 611, and CO is introduced into the plastic shell 2 The sensor 41 is wrapped with the temperature and humidity sensor 42.
The PI heating film is an automatic constant-temperature and power-saving electric heater and has the advantages of small thermal resistance, high heat exchange efficiency and good safety performance.
Wherein, the dew removing device 52 can adopt PI heating film produced by Rui pu electric appliance of easguan city, which has excellent high and low temperature resistance, electric insulation, caking property and radiation resistance, and can be used for a long time in the temperature range of-100-240 ℃ and can reach the high temperature of 300 ℃ in a short time.
Wherein, dew removing principle of dew removing device 52 is: when dew condensation occurs on the temperature and humidity sensor 42 or the vent hole 61, the PI heating film heats dew attached to the surface, the dew on the temperature and humidity sensor 42 and the vent hole 61 is evaporated, and CO is guaranteed 2 The data acquisition results of the sensor 41 and the temperature and humidity sensor 42 are accurate.
As shown in fig. 2, in the above technical solution, the solar water heater further includes a waterproof box 6, a main control unit 1, a power module 2, and a CO 2 The sensor 41 is positioned inside the waterproof box 6, the communication module 3 and the temperature and humidity sensor 42 are arranged on the side wall of the waterproof box 6 2 The sensor 41 and the temperature and humidity sensor 42 are provided with plastic shells, and the plastic shells are covered with hydrophobic films.
Wherein, in the above technical scheme, still be provided with ventilation hole 61 on waterproof box 6, be provided with support frame 611 on ventilation hole 61, all cover hydrophobic membrane on waterproof box 6 and ventilation hole 61.
Wherein the hydrophobic membrane is ES673 produced by Dongguan micro-Er science and technology Limited, and has air permeability of more than 1200ml/min/cm2 and dustproof and waterproof grade of IP67/IP68.
Specifically, the principle of the utility model is that: CO 2 2 Sensor 41 and temperature and humidity sensor 42 for CO in air 2 The concentration, the temperature and the humidity are subjected to real-time data acquisition, the acquired data are synchronously transmitted to the main control unit 1 through the I2C interface, the main control unit 1 uploads the received data to the platform through the communication module 3, and the CO is subjected to CO (carbon monoxide) processing 2 The data of the sensor 41 and the temperature and humidity sensor 42 are analyzed and logically configured, if the data analysis shows that the dew condensation condition exists on the sensor module 4, the main control unit 1 controls the dew condensation removing device 52 through the control unit 51 to control the CO 2 The sensor 41 and the temperature/humidity sensor 42 are subjected to dew removal treatment to remove CO 2 Dew on the sensor 41 and the temperature and humidity sensor 42 is treated, and accuracy of data collected by the sensors is guaranteed.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. CO based on automatic heating dew removal 2 The temperature and humidity three-in-one sensor is characterized by comprising a main control unit (1), a power supply module (2), a communication module (3), a sensor module (4) and a dew removing module (5);
the main control unit (1) is electrically connected with the power module (2), the communication module (3), the sensor module (4) and the dew removing module (5) and is used for receiving information, analyzing and logically configuring the information, and removing dew and preventing dew removal through the dew removing module (5);
the power module (2) is electrically connected with the main control unit (1), the communication module (3), the sensor module (4) and the dew removal module (5) and is used for supplying power to components connected with the sensor module;
one end of the communication module (3) is connected with a communication interface of the main control unit (1), and the other end of the communication module is connected with the gateway through a 485 line, so that the communication between the main unit and the platform is realized in a 485 communication mode;
the sensor module (4) comprises CO 2 A sensor (41) and a temperature and humidity sensor (42) for measuring the ambient CO 2 The concentration and the temperature and humidity are transmitted to the main control unit (1) through an interface;
the dew removing module (5) comprises a control unit (51) and a dew removing device (52), wherein the control unit (51) is used for being matched with the main control unit (1) to carry out switch heating control on the dew removing device (52).
2. CO based on self-heating dewing according to claim 1 2 The temperature and humidity three-in-one sensor is characterized in that the power module (2) is externally connected with a 12V direct-current voltage.
3. CO based on self-heating dewing according to claim 2 2 Temperature and humidity trinity sensor, its characterized in that, power module (2) contain two DCDC conversion chips for give with 12V's voltage conversion 3.3V's voltage and 5V's voltage communication module (3) remove dew module (5) power supply.
4. CO based on self-heating dewing according to claim 3 2 Temperature and humidity trinity sensor, its characterized in that, power module (2) still include an LDO conversion chip for convert 5V's voltage into 3.3V's voltage give main control unit (1) sensor module (4) power supply.
5. CO based on self-heating dewing according to claim 1 2 The three-in-one temperature and humidity sensor is characterized in that the communication module (3) converts a serial port of the main control unit (1) into a 485 bus interface by using a 485 chip,for interfacing with the platform gateway.
6. CO based on self-heating dewing according to claim 1 2 The temperature and humidity three-in-one sensor is characterized in that the sensor module (4) further comprises a pull-up resistor and a filter capacitor.
7. CO based on self-heating dewing according to claim 1 2 The three-in-one sensor for temperature and humidity is characterized in that CO is used as the sensor 2 And data of the sensor (41) and the temperature and humidity sensor (42) chip are sent to the main control unit (1) through an I2C bus interface.
8. CO based on self-heating dewing according to claim 1 2 Temperature and humidity trinity sensor, its characterized in that, remove dew device (52) and be PI heating film, the number that removes dew device (52) is 2, set up respectively on the inner wall of plastic casing tip and support frame (611), will CO on the support frame (611) 2 The sensor (41) and the temperature and humidity sensor (42) are wrapped.
9. CO based on self-heating dewing according to claim 8 2 The three-in-one temperature and humidity sensor is characterized by further comprising a waterproof box (6), wherein the main control unit (1), the power module (2) and the CO are arranged in the waterproof box 2 The sensor (41) is located inside the waterproof box (6), the communication module (3) and the temperature and humidity sensor (42) are arranged on the side wall of the waterproof box (6), and the CO is 2 The plastic shell is arranged on the sensor (41) and the temperature and humidity sensor (42), and a hydrophobic film covers the plastic shell.
10. CO based on self-heating dewing according to claim 9 2 Temperature and humidity trinity sensor, its characterized in that still is provided with ventilation hole (61) on waterproof box (6), be provided with support frame (611) on ventilation hole (61), waterproof box (6) with all cover on ventilation hole (61) and have hydrophobic membrane.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222095559.XU CN218822485U (en) | 2022-08-10 | 2022-08-10 | CO based on automatic heating dew removal 2 Temperature and humidity three-in-one sensor |
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| CN202222095559.XU CN218822485U (en) | 2022-08-10 | 2022-08-10 | CO based on automatic heating dew removal 2 Temperature and humidity three-in-one sensor |
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