CN218600776U - Refrigerant gas leakage detection device and system - Google Patents
Refrigerant gas leakage detection device and system Download PDFInfo
- Publication number
- CN218600776U CN218600776U CN202223147152.3U CN202223147152U CN218600776U CN 218600776 U CN218600776 U CN 218600776U CN 202223147152 U CN202223147152 U CN 202223147152U CN 218600776 U CN218600776 U CN 218600776U
- Authority
- CN
- China
- Prior art keywords
- refrigerant
- circuit
- temperature
- humidity
- refrigerant gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The application provides a refrigerant gas leakage detection device and system, the device includes: the temperature and humidity detection circuit comprises a control circuit, an AD conversion circuit, a refrigerant detection circuit and a temperature and humidity detection circuit; the refrigerant detection circuit is used for detecting a refrigerant gas concentration analog voltage signal in an environment in real time and sending the refrigerant gas concentration analog voltage signal to the AD conversion circuit; the AD conversion circuit is used for converting the refrigerant gas concentration analog voltage signal into a refrigerant gas concentration digital signal and sending the refrigerant gas concentration digital signal to the control circuit; the control circuit is used for determining the concentration of the refrigerant gas according to the digital signal of the concentration of the refrigerant gas and outputting a refrigerant leakage alarm signal when the concentration of the refrigerant gas is judged to exceed a preset reference concentration; the temperature and humidity information collected by the temperature and humidity detection circuit can be used as the adjustment reference of the preset reference concentration. This application is through above-mentioned circuit, realizes the automatic accurate detection of refrigerant gas leakage to in time report to the police when confirming to take place to leak, and equipment is simple with low costs.
Description
Technical Field
The application relates to the technical field of semiconductor testing, in particular to a refrigerant gas leakage detection device and system.
Background
At present, refrigerant gas leakage detection in the technical field of temperature control in the semiconductor industry is generally performed in a mode of a handheld refrigerant detector, for example, a temperature controller is used for detecting the temperature of the environment. The detection by using the handheld refrigerant detector has the following problems:
1. the refrigerant leakage can not be detected in real time, under the ordinary condition, when the refrigeration equipment can not work normally, a worker can detect whether the refrigerant leaks by using a refrigerant detector, and the refrigerant leaks in a large amount at the time, so that the loss is large.
2. The single cost of the hand-held refrigerant detector is thousands of yuan, the cost of a single temperature controller is hundreds of yuan, the using amount is more, and the cost is higher.
SUMMERY OF THE UTILITY MODEL
An object of this application is to provide a refrigerant gas leakage detection device and system, through refrigerant detection circuitry, temperature and humidity detection circuit, AD converting circuit and control circuit, realizes the automatic accurate detection of refrigerant gas leakage to in time report to the police when confirming to take place to leak, and equipment is simple with low costs.
In a first aspect, an embodiment of the present application provides a refrigerant gas leakage detection device, including: the temperature and humidity detection circuit comprises a control circuit, an AD conversion circuit, a refrigerant detection circuit and a temperature and humidity detection circuit; the refrigerant detection circuit, the AD conversion circuit and the control circuit are sequentially connected; the temperature and humidity detection circuit is connected with the AD conversion circuit; the refrigerant detection circuit is used for collecting a refrigerant gas concentration analog voltage signal in an environment in real time and sending the refrigerant gas concentration analog voltage signal to the AD conversion circuit; the AD conversion circuit is used for converting the refrigerant gas concentration analog voltage signal into a refrigerant gas concentration digital signal and sending the refrigerant gas concentration digital signal to the control circuit; the control circuit is used for determining the concentration of the refrigerant gas according to the digital signal of the concentration of the refrigerant gas and outputting a refrigerant leakage alarm signal when the concentration of the refrigerant gas is judged to exceed a preset reference concentration; the temperature and humidity detection circuit is used for collecting temperature and humidity analog voltage signals in the environment where the refrigerant detection circuit is located in real time and sending the temperature and humidity analog voltage signals to the AD conversion circuit; the AD conversion circuit is also used for converting the temperature and humidity analog voltage signal into a temperature and humidity digital voltage signal and sending the temperature and humidity digital voltage signal to the control circuit; the control circuit is also used for determining temperature and humidity information according to the temperature and humidity digital voltage signals and adjusting the preset reference concentration in real time according to the change condition of the temperature and humidity information.
In a preferred embodiment of the present application, the control circuit is further configured to output a temperature and humidity abnormal alarm signal when the temperature and humidity information is determined to exceed the preset temperature and humidity threshold.
In a preferred embodiment of the present invention, the refrigerant gas leakage detecting device further includes: the timing circuit is connected with the control circuit; the control circuit is also used for controlling the refrigerant detection circuit to start working when detecting that the preset electrifying time of the refrigerant detection circuit reaches the time set by the timing circuit.
In a preferred embodiment of the present invention, the refrigerant detection circuit includes: at least one refrigerant sensor arranged on the refrigerant pipeline; the control circuit is also used for determining the position of refrigerant leakage according to the identification of the refrigerant sensor while outputting the refrigerant leakage alarm signal.
In a preferred embodiment of the present application, the temperature/humidity detection circuit includes: the temperature and humidity sensor is arranged in a corresponding specified range at the position of each refrigerant sensor; the temperature and humidity sensor is used for acquiring temperature and humidity analog signals corresponding to the position of the refrigerant sensor.
In a preferred embodiment of the present invention, the refrigerant gas leakage detecting device further includes: the power supply control circuit and the power supply circuit are respectively connected with the refrigerant detection circuit, the AD conversion circuit, the temperature and humidity detection circuit and the control circuit; the power supply control circuit is used for controlling the electrification and the outage of the refrigerant detection circuit and the temperature and humidity detection circuit and the switching of the power supply voltages of the refrigerant detection circuit and the temperature and humidity detection circuit; the power supply circuit provides power for the refrigerant detection circuit, the temperature and humidity detection circuit and the control circuit.
In a preferred embodiment of the present application, the control circuit includes an MCU chip and an MCU interface circuit; the MCU chip is respectively connected with the AD conversion circuit, the power supply circuit and the power supply control circuit through the MCU interface circuit.
In a preferred embodiment of the present application, the control circuit further includes: and the debugging interface circuit is connected with the MCU chip.
In a second aspect, an embodiment of the present application further provides a refrigerant gas leakage detection system, which includes an upper computer and the refrigerant gas leakage detection apparatus according to the first aspect; the upper computer is connected with a control circuit in the refrigerant gas leakage detection device; the upper computer is used for receiving the refrigerant gas concentration information and/or the refrigerant leakage alarm signal sent by the control circuit.
In a preferred embodiment of the present application, the control circuit includes an MCU chip and a CAN interface circuit; the MCU chip is connected with the upper computer through a CAN interface circuit.
In refrigerant gas leakage detection device and system that this application embodiment provided, the device includes: the temperature and humidity detection circuit comprises a control circuit, an AD conversion circuit, a refrigerant detection circuit and a temperature and humidity detection circuit; the refrigerant detection circuit, the AD conversion circuit and the control circuit are sequentially connected; the temperature and humidity detection circuit is connected with the AD conversion circuit; the refrigerant detection circuit is used for collecting a refrigerant gas concentration analog voltage signal in an environment in real time and sending the refrigerant gas concentration analog voltage signal to the AD conversion circuit; the AD conversion circuit is used for converting the refrigerant gas concentration analog voltage signal into a refrigerant gas concentration digital signal and sending the refrigerant gas concentration digital signal to the control circuit; the control circuit is used for determining the concentration of the refrigerant gas according to the digital signal of the concentration of the refrigerant gas and outputting a refrigerant leakage alarm signal when the concentration of the refrigerant gas is judged to exceed a preset reference concentration; the temperature and humidity detection circuit is used for collecting temperature and humidity analog voltage signals in the environment where the refrigerant detection circuit is located in real time and sending the temperature and humidity analog voltage signals to the AD conversion circuit; the AD conversion circuit is also used for converting the temperature and humidity analog voltage signal into a temperature and humidity digital voltage signal and sending the temperature and humidity digital voltage signal to the control circuit; the control circuit is also used for determining temperature and humidity information according to the temperature and humidity digital voltage signals and adjusting the preset reference concentration in real time according to the change condition of the temperature and humidity information. The embodiment of the application carries out real-time adjustment to the preset reference concentration of the refrigerant detection circuit through the humiture information acquired and converted by the humiture detection circuit and the AD conversion circuit, then compares the preset reference concentration with the gas concentration of the refrigerant acquired and converted by the refrigerant detection circuit and the AD conversion circuit, determines the detection result of refrigerant leakage, and timely alarms when leakage is determined to occur, and the equipment is simple and low in cost.
Drawings
In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a refrigerant gas leakage detection apparatus according to an embodiment of the present disclosure;
fig. 2 is a schematic structural view of another refrigerant gas leakage detection apparatus provided in the embodiment of the present application;
fig. 3 is a schematic diagram of a control process provided in an embodiment of the present application;
fig. 4 is a schematic structural diagram of another refrigerant gas leakage detection apparatus according to an embodiment of the present disclosure;
fig. 5 is a schematic structural view of another refrigerant gas leakage detection apparatus according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a refrigerant gas leakage detection system according to an embodiment of the present disclosure;
fig. 7 is a working block diagram of a refrigerant gas leakage detection system according to an embodiment of the present application.
Detailed Description
The technical solutions of the present application will be described clearly and completely with reference to the following embodiments, and it should be apparent that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the semiconductor industry, refrigerant gas leakage detection in the technical field of temperature control is generally performed in a handheld refrigerant detector mode, and the handheld refrigerant detector is large in usage amount and high in cost.
Based on this, this application embodiment provides a refrigerant gas leakage detection device and system, through refrigerant detection circuitry, temperature and humidity detection circuit, AD converting circuit and control circuit, realizes the automatic accurate detection of refrigerant gas leakage to in time report to the police when confirming to take place to leak, and equipment is simple with low costs.
For the convenience of understanding the present embodiment, a refrigerant gas leakage detecting apparatus disclosed in the embodiments of the present application will be described in detail first.
Fig. 1 is a block diagram of a refrigerant gas leakage detection apparatus according to an embodiment of the present application, where the apparatus includes: a control circuit 11, an AD conversion circuit 12, a refrigerant detection circuit 13 and a temperature and humidity detection circuit 14; the refrigerant detection circuit 13, the AD conversion circuit 12 and the control circuit 11 are connected in sequence; the temperature and humidity detection circuit 14 is connected with the AD conversion circuit 12; the refrigerant detection circuit 13 is used for collecting a refrigerant gas concentration analog voltage signal in an environment in real time and sending the refrigerant gas concentration analog voltage signal to the AD conversion circuit 12; the AD conversion circuit 12 is configured to convert the refrigerant gas concentration analog voltage signal into a refrigerant gas concentration digital signal, and send the refrigerant gas concentration digital signal to the control circuit 11; the control circuit 11 is used for determining the refrigerant gas concentration according to the refrigerant gas concentration digital signal and outputting a refrigerant leakage alarm signal when judging that the refrigerant gas concentration exceeds a preset reference concentration; the temperature and humidity detection circuit 14 is used for acquiring temperature and humidity analog voltage signals in the environment where the refrigerant detection circuit 13 is located in real time and sending the temperature and humidity analog voltage signals to the AD conversion circuit 12; the AD conversion circuit 12 is further configured to convert the temperature and humidity analog voltage signal into a temperature and humidity digital voltage signal, and send the temperature and humidity digital voltage signal to the control circuit 11; the control circuit 11 is further configured to determine temperature and humidity information according to the temperature and humidity digital voltage signal, and adjust the preset reference concentration in real time according to a change condition of the temperature and humidity information.
The refrigerant detection circuit 13 may be at least one refrigerant sensor provided in a refrigerant pipe, and in order to improve detection accuracy, the refrigerant sensor may be provided in a pipe portion where leakage is likely to occur. The refrigerant detection circuit 13 detects the refrigerant gas concentration in real time and outputs the acquired refrigerant gas concentration analog voltage value. After the refrigerant sensor works normally, in a calibrated environment, the refrigerant real-time voltage value is adjusted through the slide rheostat to be lower than the refrigerant reference voltage value by 1.9V and generally adjusted to be about 1.8V, when refrigerant gas leakage is detected, the internal resistance value of the sensor surface is changed through chemical reaction with the refrigerant gas, so that the output voltage of the sensor is changed, the refrigerant real-time voltage value can rise and is higher than the refrigerant reference voltage value, and at the moment, the control circuit can give an alarm.
The specific working process of the device is as follows: the refrigerant detection circuit 13 transmits the acquired refrigerant gas concentration analog voltage signal to the AD conversion circuit 12; the AD conversion circuit 12 may be an ADC chip, for example, the AD7175 is used to acquire and convert analog quantity, a corresponding software module needs to perform relevant configuration on the AD7175, and perform conversion and optimized filtering processing on analog quantity voltages acquired by each port, so as to output a digital quantity voltage value. The ADC chip converts and filters the acquired analog voltage for optimization processing, then transmits the refrigerant gas concentration digital signal to the MCU in the control circuit 11 through the SPI interface, the MCU obtains the refrigerant gas concentration after calculation through an algorithm formula, and outputs a refrigerant leakage alarm signal when judging that the refrigerant gas concentration exceeds a preset reference concentration.
The refrigerant gas leakage detection device that this application embodiment provided includes: the temperature and humidity detection circuit comprises a control circuit, an AD conversion circuit, a temperature and humidity detection circuit and a refrigerant detection circuit; by adopting the circuit form, the cost is about several hundred yuan, and the refrigerant detection cost is greatly reduced; and can adjust refrigerant detection circuitry's preset reference concentration in real time through temperature and humidity detection circuit, the humiture information that AD converting circuit gathered the conversion, based on preset reference concentration and through refrigerant detection circuitry, the refrigerant gas concentration that AD converting circuit gathered the conversion and obtained carries out the comparison, confirm refrigerant leakage detection result, and in time report to the police when confirming to take place to leak, can accurately detect whether refrigerant gas leaks in real time promptly, in time report to the police, stop the loss fast, avoid causing bigger loss.
In the process of refrigerant detection research, the applicant finds that the conventional mode of a handheld detector can only detect whether refrigerant gas leakage exists in the environment, but cannot confirm the specific position of the refrigerant gas leakage. The temperature controller can detect the temperature of the environment and cannot detect the humidity of the working environment of the refrigerant sensor in real time. Based on this, the embodiment of the present application further provides a structural block diagram of a refrigerant gas leakage detection device, as shown in fig. 2, in the refrigerant gas leakage detection device, the refrigerant detection circuit 13 includes: at least one refrigerant sensor 131 (1 to N shown in fig. 2) disposed on the refrigerant pipeline; the control circuit 11 is further configured to determine a refrigerant leakage position according to the identifier of the refrigerant sensor 131 while outputting a refrigerant leakage alarm signal.
The temperature and humidity detection circuit 14 includes: a temperature and humidity sensor 141 arranged in a corresponding specified range at the position of each refrigerant sensor 131; the temperature and humidity sensor 141 is configured to collect temperature and humidity analog signals corresponding to the position of the refrigerant sensor 131, and send the temperature and humidity analog voltage signals to the AD conversion circuit 12; the AD conversion circuit 12 is further configured to convert the temperature and humidity analog voltage signal into a temperature and humidity digital voltage signal, and send the temperature and humidity digital voltage signal to the control circuit 11; the control circuit 11 is further configured to determine temperature and humidity information according to the temperature and humidity digital voltage signal, and output a temperature and humidity abnormality alarm signal when it is determined that the temperature and humidity information exceeds a preset temperature and humidity threshold.
The determination process of the temperature and humidity information is as follows: the temperature and humidity sensor detects the temperature and humidity of the surrounding environment of the refrigerant sensor in real time and outputs a collected temperature and humidity analog voltage value. The surface temperature and humidity change of the temperature and humidity sensor causes resistance value change, so that output voltage changes, the output voltage is transmitted to an MCU in a control circuit after being converted by the ADC, and the MCU passes through a formula:
t = -66.875.75 × VT/VDD and RH = -12.5+125 × VRH/VDD;
and calculating to obtain the temperature and humidity value.
Therefore, the temperature condition around the refrigerant sensor can be known in real time, so that the reference concentration information can be adjusted. Namely, the control circuit is also used for adjusting the reference concentration information in real time according to the change condition of the temperature and humidity information. Technical manual and experimental data show that the performance of refrigerant sensor itself can receive the influence of humiture, and in same refrigerant gas environment, temperature or humidity are gradually increased, and the refrigerant real-time voltage value that refrigerant sensor surveyed can gradually increase. The temperature and humidity detection circuit 14 is convenient for detecting the temperature and humidity of the working environment of the refrigerant sensor 131 in real time, and sends the humidity and humidity analog signal to the MCU of the control circuit 11 through the AD conversion circuit 12, the MCU performs real-time reference concentration adjustment, thereby avoiding false alarm triggered by the change of the real-time voltage value of the refrigerant due to the change of the temperature and humidity, and the specific control flow is as shown in fig. 3.
In the preferred embodiment of the present application, a single AD conversion circuit (AD acquisition board) can be connected to four refrigerant sensors and four temperature and humidity sensors. The AD acquisition board has 16 signal channels, and each refrigerant acquisition board and temperature and humidity acquisition board need occupy 4 channels, so an AD control panel can be accessed into 4 refrigerant acquisition boards and 4 temperature and humidity acquisition boards, namely 4 paths of refrigerant sensors and 4 paths of temperature and humidity sensors. The refrigerant sensor and the temperature and humidity sensor are small in size and convenient to install, and can be installed at the position of a refrigerant pipeline where leakage is easy to occur, and the sensor at which position gives an alarm, so that the leakage position of refrigerant gas can be determined.
In addition, in the research of refrigerant detection, the applicant also finds that when the refrigerant sensor is electrified, the voltage of a voltage output pin of the refrigerant sensor is suddenly increased, the detected real-time voltage value of the refrigerant exceeds the reference voltage of the refrigerant, the refrigerant leakage alarm is caused, the environment where the sensor is located may not have refrigerant gas, and the false alarm problem is caused.
Based on this, in the embodiment of the present application, the refrigerant gas leakage detecting device further includes: a timing circuit 15 connected to the control circuit 11, see fig. 4; the control circuit 11 is further configured to control the refrigerant detection circuit 13 to start operating when detecting that the preset power-on time of the refrigerant detection circuit reaches the time set by the timing circuit.
After the timing circuit is introduced, the refrigerant sensor cannot enter a working state immediately when being electrified initially, false alarm cannot occur, and the sensor can normally work after about 15 minutes (the starting time of the refrigerant sensor is about 12 minutes), so that the problem of electrification false alarm is avoided.
Referring to fig. 5, the refrigerant gas leakage detecting apparatus further includes: a power supply control circuit 16 and a power supply circuit 17 which are respectively connected with the refrigerant detection circuit 13, the AD conversion circuit 12, the temperature and humidity detection circuit 14 and the control circuit 11; the power supply control circuit 16 is connected to the power supply circuit 17. The power supply control circuit 16 is used for controlling the power-on and power-off of the detection circuit and the switching of the power supply voltage of the detection circuit; the power supply circuit 17 supplies power to the detection circuit and the control circuit. In a preferred embodiment of the present application, the control circuit includes an MCU chip and an MCU interface circuit; the MCU chip is respectively connected with the AD conversion circuit, the power supply circuit and the power supply control circuit through the MCU interface circuit. The control circuit further includes: and the debugging interface circuit is connected with the MCU chip and is used for completing the function debugging of the chip.
The MCU realizes control over power supply of the sensor and switching of a power supply (the power supply of the sensor can be switched to 5V or 24V) by realizing control over the external relay.
The refrigerant gas leakage detection device provided by the embodiment of the application is applied to the technical field of temperature control in the semiconductor industry, and the AD control board can be simultaneously connected with four refrigerant sensors and four temperature and humidity sensors; the temperature and humidity of the working environment of the refrigerant sensor can be detected in real time; when refrigerant gas leakage or temperature and humidity abnormality is detected, an alarm can be given through the MCU or the upper computer; the refrigerant and temperature and humidity sensor is small in size and easy to install, and the position of refrigerant gas leakage can be further conveniently determined; the setting of the timing circuit can prevent false alarm on the refrigerant sensor; the simultaneous detection of the refrigerant gas concentration information and the temperature and humidity information can adjust the reference concentration information in real time so as to ensure that the detected refrigerant concentration information and the alarm are accurate.
Based on the above device embodiment, the present application embodiment further provides a refrigerant gas leakage detection system, as shown in fig. 6, the system includes an upper computer 62 and the refrigerant gas leakage detection device 64 as described above; the upper computer 62 is connected with a control circuit 642 in the refrigerant gas leakage detection device 64; the upper computer 62 is used for receiving the refrigerant gas concentration information and/or the refrigerant leakage alarm signal sent by the control circuit 642. The upper computer software interface can display the temperature and humidity value of the current environment of the refrigerant detection circuit, and display the working state of the refrigerant sensor, the real-time voltage value of the refrigerant concentration and the refrigerant gas concentration.
In a preferred embodiment of the present application, the control circuit 642 includes an MCU chip and a CAN interface circuit; the MCU chip is connected with the upper computer through a CAN interface circuit.
Before refrigerant gas detection, various information configurations CAN be firstly carried out, such as SPI communication configuration (between an MCU and an ADC chip), CAN communication configuration (between the MCU and an upper computer), configuration of related timers and the like. Calling the CAN and SPI library files at the bottom layer of the STM32, configuring various parameters, combining the CAN communication protocol, compiling corresponding transceiving functions and finally realizing the complete communication function. On-off control of the sensor can be achieved through the upper computer interface.
In this application embodiment, the AD converting circuit (like AD7175 chip) carries out analog-to-digital conversion with refrigerant gas analog signal and the humiture analog signal that the refrigerant sensor gathered, filtering optimization handles, MCU reads the digital quantity voltage value of AD converting circuit output, communicate through the SPI bus between MCU and the AD chip, then MCU carries out corresponding algorithm to digital quantity voltage value and handles, and send the humiture information and the refrigerant gas concentration information after will converting for the host computer through the CAN transceiver. The operation block diagram is shown in fig. 7.
The system provided by the embodiment of the present application, which has the same implementation principle and the same technical effect as those of the foregoing device embodiment, for brief description, and where no mention is made in part of the embodiment of the system, reference may be made to the corresponding contents in the foregoing device embodiment.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer-readable storage medium executable by a processor. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and operate, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present application, and are used to illustrate the technical solutions of the present application, but not to limit the technical solutions, and the scope of the present application is not limited to the above-mentioned embodiments, although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope disclosed in the present application; such modifications, changes or substitutions do not depart from the spirit and scope of the exemplary embodiments of the present application, and are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A refrigerant gas leakage detection device, comprising: the temperature and humidity detection circuit comprises a control circuit, an AD conversion circuit, a refrigerant detection circuit and a temperature and humidity detection circuit; the refrigerant detection circuit, the AD conversion circuit and the control circuit are sequentially connected; the temperature and humidity detection circuit is connected with the AD conversion circuit;
the refrigerant detection circuit is used for collecting a refrigerant gas concentration analog voltage signal in an environment in real time and sending the refrigerant gas concentration analog voltage signal to the AD conversion circuit;
the AD conversion circuit is used for converting the refrigerant gas concentration analog voltage signal into a refrigerant gas concentration digital signal and sending the refrigerant gas concentration digital signal to the control circuit;
the control circuit is used for determining the concentration of refrigerant gas according to the digital refrigerant gas concentration signal and outputting a refrigerant leakage alarm signal when judging that the concentration of the refrigerant gas exceeds a preset reference concentration;
the temperature and humidity detection circuit is used for collecting temperature and humidity analog voltage signals in the environment where the refrigerant detection circuit is located in real time and sending the temperature and humidity analog voltage signals to the AD conversion circuit;
the AD conversion circuit is also used for converting the temperature and humidity analog voltage signal into a temperature and humidity digital voltage signal and sending the temperature and humidity digital voltage signal to the control circuit;
the control circuit is further used for determining temperature and humidity information according to the temperature and humidity digital voltage signals and adjusting the preset reference concentration in real time according to the change condition of the temperature and humidity information.
2. The refrigerant gas leakage detection apparatus according to claim 1,
the control circuit is further used for outputting a temperature and humidity abnormity alarm signal when the temperature and humidity information is judged to exceed a preset temperature and humidity threshold value.
3. The refrigerant gas leakage detection device according to claim 1, further comprising: the timing circuit is connected with the control circuit;
the control circuit is also used for controlling the refrigerant detection circuit to start working when the preset electrifying time of the refrigerant detection circuit is detected to reach the time set by the timing circuit.
4. The refrigerant gas leak detection device according to claim 1, wherein the refrigerant detection circuit includes: at least one refrigerant sensor arranged on the refrigerant pipeline; the control circuit is also used for determining the position of refrigerant leakage according to the identification of the refrigerant sensor while outputting the refrigerant leakage alarm signal.
5. The refrigerant gas leakage detection device according to claim 4, wherein the temperature/humidity detection circuit includes: the position of each refrigerant sensor corresponds to a temperature and humidity sensor arranged in a specified range;
the temperature and humidity sensor is used for acquiring temperature and humidity analog signals corresponding to the position of the refrigerant sensor.
6. The refrigerant gas leak detection device according to claim 1, further comprising: the power supply control circuit and the power supply circuit are respectively connected with the refrigerant detection circuit, the AD conversion circuit, the temperature and humidity detection circuit and the control circuit;
the power supply control circuit is used for controlling the on and off of the refrigerant detection circuit and the temperature and humidity detection circuit and the switching of the power supply voltages of the refrigerant detection circuit and the temperature and humidity detection circuit;
the power supply circuit provides power for the refrigerant detection circuit, the temperature and humidity detection circuit and the control circuit.
7. The refrigerant gas leakage detection device according to claim 6, wherein the control circuit includes an MCU chip, an MCU interface circuit; the MCU chip is respectively connected with the AD conversion circuit, the power supply circuit and the power supply control circuit through the MCU interface circuit.
8. The refrigerant gas leakage detection device according to claim 7, wherein the control circuit further comprises: and the debugging interface circuit is connected with the MCU chip.
9. A refrigerant gas leakage detection system, characterized by, the said system includes the upper computer and any one of the refrigerant gas leakage detection device of claims 1-8; the upper computer is connected with a control circuit in the refrigerant gas leakage detection device;
the upper computer is used for receiving the refrigerant gas concentration information and/or the refrigerant leakage alarm signal sent by the control circuit 。
10. The refrigerant gas leakage detection system according to claim 9, wherein the control circuit includes an MCU chip, a CAN interface circuit; the MCU chip is connected with the upper computer through the CAN interface circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223147152.3U CN218600776U (en) | 2022-11-25 | 2022-11-25 | Refrigerant gas leakage detection device and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223147152.3U CN218600776U (en) | 2022-11-25 | 2022-11-25 | Refrigerant gas leakage detection device and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218600776U true CN218600776U (en) | 2023-03-10 |
Family
ID=85409272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223147152.3U Active CN218600776U (en) | 2022-11-25 | 2022-11-25 | Refrigerant gas leakage detection device and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218600776U (en) |
-
2022
- 2022-11-25 CN CN202223147152.3U patent/CN218600776U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100933001B1 (en) | Group management system, semiconductor manufacturing apparatus, information processing method and recording medium having program thereon | |
| CN108235801B (en) | Access method and system of intelligent device | |
| CN107270968A (en) | A kind of integrated machine system of indoor dust-free environmental monitoring | |
| US20230152389A1 (en) | Method for Detecting Storage Battery of Vehicle and Battery Detection Device | |
| CN114492629A (en) | Abnormality detection method, abnormality detection device, electronic apparatus, and storage medium | |
| ITMI20081522A1 (en) | SYSTEM FOR THE CONTROL AND / OR WALL DEHUMIDIFICATION | |
| CN218600776U (en) | Refrigerant gas leakage detection device and system | |
| CN110530408A (en) | A kind of Transducer-fault Detecting Method, detection circuit and detector | |
| CN103115656B (en) | Method and device for detecting position of fluid channel | |
| CN109405867B (en) | Sensor detection control method and system for mobile robot | |
| US8060332B2 (en) | Method for testing sensor function and computer program product thereof | |
| CN107817432B (en) | MEMS gyroscope circuit board detection method and device | |
| CN110736950A (en) | Online testing system and method for battery management system | |
| CN114460464A (en) | Motor calibration method and device | |
| CN112212908B (en) | Intelligent sensor and intelligent method thereof | |
| CN113933694A (en) | Method and device for detecting running state of optical coupling relay | |
| CN210803623U (en) | Charger detection device and system | |
| CN210181590U (en) | MCU parameter testing system | |
| CN209842370U (en) | Data acquisition and storage system for intelligent multi-channel digital signals | |
| CN112461371A (en) | Portable thermal imager system with laser range finder | |
| US10416233B2 (en) | Electronic apparatus and control method thereof | |
| CN112067165A (en) | Temperature sensor precision testing system, testing method, testing device and storage medium | |
| CN113358200A (en) | Digital sensor junction box and weighing system based on same | |
| CN111238560A (en) | Test method for sensor data acquisition module for intelligent cat house | |
| CN109188072A (en) | A kind of power detection device, radar system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |