Liquefied gas detection control device

Abstract

The utility model relates to the technical field of intelligent fuel gas, and discloses a liquefied gas detection control device. The liquefied gas detection control device is used for a liquefied gas bottle, and comprises a main control chip; the sensor module is electrically connected with the main control chip and is used for detecting the information of the liquefied gas and / or the information of the liquefied gas bottle and transmitting the detected information of the liquefied gas and / or the information of the liquefied gas bottle to the main control chip; and the electromagnetic valve is electrically connected with the main control chip and used for controlling on-off of a gas source of the liquefied gas bottle, and the main control chip can control opening and closing of the electromagnetic valve according to information detected by the sensor module. According to the liquefied gas detection control device disclosed by the embodiment of the invention, the detection module and the control module are integrated together, so that the use safety of the liquefied gas bottle can be improved, and the life and property safety of a user is protected.

Description

Technical Field

[0001] This application relates to the field of intelligent gas technology, for example, to a liquefied gas detection and control device. Background Art

[0002] Liquefied gas, with the advantages of convenient transportation and storage and low price cost, is still widely used in residential and industrial and commercial users at present. However, liquefied gas itself has the characteristics of flammability and explosiveness, and its lower explosion limit is 1.5% vol.

[0003] In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related technologies:

[0004] When the liquefied gas in the related technologies is in use, it is generally stored in a liquefied gas cylinder. The liquefied gas cylinder has strong mobility and is convenient to use. However, when leakage occurs, it is not easy for users to detect, and it is easy to explode, which brings danger to the life and property safety of users.

[0005] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Utility Model

[0006] To have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. The summary is not a general review, nor is it intended to identify key / important constituent elements or delineate the protection scope of these embodiments, but rather serves as a preamble to the subsequent detailed description.

[0007] The embodiments of the present disclosure provide a liquefied gas detection and control device to improve the safety of liquefied gas use.

[0008] The embodiments of the present disclosure provide a liquefied gas detection and control device for a liquefied gas cylinder. The liquefied gas detection and control device includes: a main control chip; a sensor module electrically connected to the main control chip, for detecting information of the liquefied gas and the liquefied gas cylinder, and transmitting the detected information of the liquefied gas and the liquefied gas cylinder to the main control chip; an electromagnetic valve electrically connected to the main control chip, for controlling the on / off of the gas source of the liquefied gas cylinder, and the main control chip can control the opening and closing of the electromagnetic valve according to the information detected by the sensor module.

[0009] Optionally, the sensor module includes a plurality of detection devices. The plurality of detection devices include: a gas sensor for detecting the concentration of the target gas in the environment where the liquefied gas cylinder is located; a temperature sensor for detecting the temperature of the liquefied gas cylinder; a pressure sensor for detecting the pressure inside the liquefied gas cylinder.

[0010] Optionally, the liquefied gas detection control device further includes: a wireless NB module, communicatively connected to the main control chip, for reporting the information detected by the sensor module to the Internet of Things platform.

[0011] Optionally, the liquefied gas detection control device further includes a power module, and the power module includes: a power supply battery, electrically connected to the main control chip, for supplying power to the main control chip; a low dropout linear regulator, connected between the power supply battery and the main control chip.

[0012] Optionally, the power module further includes: a backup battery, for supplying power to the main control chip when the power supply battery is out of power; and / or, the power module is adapted to be connected to an external power supply.

[0013] Optionally, the liquefied gas detection control device further includes: a timer, integrated inside the main control chip, for periodically waking up the main control chip so that the main control chip processes work tasks.

[0014] Optionally, the liquefied gas detection control device further includes a display module, and the display module includes: a liquid crystal display screen, electrically connected to the main control chip, for displaying the working information of the liquefied gas detection control device; and / or, the display module includes: an indicator light, electrically connected to the main control chip, for displaying the working information of the liquefied gas detection control device.

[0015] Optionally, the liquefied gas detection control device further includes: a housing, defining a cavity, and the main control chip and the sensor module are both located inside the cavity; wherein, the housing is provided with ventilation holes so that gas can enter the cavity through the ventilation holes.

[0016] Optionally, the display module is arranged on the front side wall of the housing; and / or, the rear side wall of the housing is configured with an installation groove, and the power supply battery is located inside the installation groove.

[0017] Optionally, the liquefied gas detection control device further includes: a voice alarm module, electrically connected to the main control chip, for issuing a voice to prompt the user; and / or, a data reading module, electrically connected to the main control chip, for storing and reading historical records.

[0018] The liquefied gas detection control device provided by the embodiments of the present disclosure can achieve the following technical effects:

[0019] The liquefied gas detection and control device according to the embodiments of the present disclosure is applied to a liquefied gas cylinder, which facilitates the detection and control of the working conditions of the liquefied gas cylinder. The main control chip of the embodiments of the present disclosure is used to control the operation of the liquefied gas detection and control device. The sensor module and the solenoid valve of the liquefied gas detection and control device are both electrically connected to the main control chip. In this way, the sensor module can transmit the collected liquefied gas information and / or the information of the liquefied gas cylinder to the control chip, so that the control chip can monitor the working conditions of the liquefied gas cylinder in real time. When a leakage or abnormal pressure and temperature occurs in the liquefied gas cylinder, the control chip can control the solenoid valve to close. The liquefied gas detection and control device according to the embodiments of the present disclosure integrates a detection module and a control module. The detection module includes a sensor module, and the control module includes a solenoid valve. In this way, the liquefied gas detection and control device has both detection and control functions, can improve the safety of using the liquefied gas cylinder, and protect the life and property safety of users.

[0020] The above general description and the following description are only exemplary and explanatory, and are not used to limit this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] One or more embodiments are illustrated by corresponding drawings. These exemplary illustrations and the drawings do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation, and among them:

[0022] Figure 1 is a schematic structural diagram of a liquefied gas detection and control device provided by an embodiment of the present disclosure;

[0023] Figure 2 is a schematic partial structural diagram of a liquefied gas detection and control device provided by an embodiment of the present disclosure;

[0024] Figure 3 is a schematic partial structural diagram of another liquefied gas detection and control device provided by an embodiment of the present disclosure;

[0025] Figure 4 is an exploded structural diagram of a liquefied gas detection and control device provided by an embodiment of the present disclosure.

[0026] REFERENCE SIGNS:

[0027] 10. Main control chip; 20. Sensor module; 21. Gas sensor; 22. Temperature sensor; 23. Pressure sensor; 30. Solenoid valve; 31. Voice alarm device; 32. Control valve wire interface; 40. Wireless NB module; 41. Power supply battery; 42. Low dropout linear regulator; 43. Backup battery; 44. Power interface; 50. Display module; 51. Liquid crystal display screen; 52. Indicator light; 53. Mute self-check key; 60. Data reading module; 61. Debugging serial port; 62. Reserved RS485 interface; 70. Housing; 71. First ventilation hole; 72. Second ventilation hole; 73. Front side wall; 74. Sound transmission hole; 75. Rear side wall; 76. Third ventilation hole; 77. Outer peripheral wall; 78. Circuit board. Detailed implementation manners

[0028] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The attached drawings are only for reference and explanation purposes and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a sufficient understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, well-known structures and devices can be shown in a simplified manner to simplify the drawings.

[0029] In the embodiments of the present disclosure, terms such as "first" and "second" in the description and claims of the present disclosure and the above-mentioned drawings are used to distinguish similar objects and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so as to describe the embodiments of the present disclosure here. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0030] In the embodiments of the present disclosure, the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "middle", "outer", "front", and "rear" is based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly used to better describe the embodiments of the present disclosure and their embodiments, and are not used to limit that the indicated devices, elements, or components must have a specific orientation or be constructed and operated in a specific orientation. And, in addition to being able to represent an orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0031] In addition, the terms "arranged", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or an internal communication between two devices, components, or parts. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0032] Unless otherwise specified, the term "plurality" means two or more.

[0033] The term "and / or" describes the associated relationship of an object and represents three possible relationships. For example, A and / or B means: A or B, or, A and B.

[0034] It should be noted that, without conflict, the embodiments in the embodiments of the present disclosure and the features in the embodiments can be combined with each other.

[0035] The main components of liquefied gas are hydrocarbons such as propane and butane, and it is also known as liquefied petroleum gas. These gases are usually

[0036] obtained from the petroleum refining process, and can also be separated from the natural gas treatment process. Liquefied gas is a flammable and explosive energy source, and its storage and use require strict compliance with safety regulations to prevent leakage or encountering an open flame, which may cause a fire or explosion accident. Liquefied gas needs to be stored in a special liquefied gas cylinder in a liquid state, and pressure reduction treatment is required before use. This makes the liquefied gas cylinder easy to move and more convenient to use, but it also leads to complex and changeable usage places of the liquefied gas cylinder, posing a great potential safety hazard.

[0037] For the sake of convenience of description, the front-back direction of this application is as Figure 4 shown.

[0038] Combined with Figures 1 to 4 shown, the embodiments of the present disclosure provide a liquefied gas detection and control device. The liquefied gas detection and control device is used for a liquefied gas cylinder. As Figure 1 shown, the liquefied gas detection and control device includes a main control chip 10, a sensor module 20, and a solenoid valve 30. The sensor module 20 is electrically connected to the main control chip 10. The sensor module 20 is used to detect information of the liquefied gas and / or information of the liquefied gas cylinder, and transmit the detected information of the liquefied gas and / or information of the liquefied gas cylinder to the main control chip 10; the solenoid valve 30 is electrically connected to the main control chip 10. The solenoid valve 30 is used to control the on-off of the liquefied gas cylinder, and the main control chip 10 can control the opening and closing of the solenoid valve 30 according to the information detected by the sensor module 20.

[0039] In the embodiments of the present disclosure, the liquefied gas detection and control device is installed on the liquefied gas cylinder, and is used to detect the liquefied gas information of the liquefied gas cylinder and / or the information of the liquefied gas cylinder. The information of the liquefied gas can be information such as the concentration and gas type of the liquefied gas, and the information of the liquefied gas cylinder can be information such as the temperature inside and outside the liquefied gas cylinder and the internal pressure, so as to be able to monitor in real time the leakage or other abnormal conditions of the liquefied gas cylinder, and be able to automatically control the on-off of the liquefied gas cylinder, realizing the integration of detection and control. The liquefied gas detection and control device is provided with a sensor module 20 and a solenoid valve 30, and both the sensor module 20 and the solenoid valve 30 are electrically connected to the control chip. In this way, the sensor module 20 can timely detect the internal information of the liquefied gas cylinder and the information of the environment where the liquefied gas cylinder is located, and can also detect whether the liquefied gas cylinder leaks. When the sensor module 20 detects liquefied gas leakage or other abnormalities in the liquefied gas cylinder, the control chip can receive the detection information of the sensor module in real time, and then control the solenoid valve 30 to close the liquefied gas cylinder, avoiding the occurrence of dangerous accidents caused by continuous leakage of liquefied gas. Therefore, the liquefied gas detection and control device of the embodiments of the present disclosure integrates detection and solenoid valve 30 control, enabling the liquefied gas cylinder to automatically detect and close the solenoid valve 30, improving the use safety of the liquefied gas cylinder, and ensuring the life and property safety of users.

[0040] Optionally, the solenoid valve 30 is electrically connected to the main control chip 10 through a CMOS (Complementary Metal Oxide Semiconductor) circuit. CMOS hardly consumes power when not switching states, which can reduce the power consumption of the liquefied gas detection and control device, improve the service life and usage duration of the liquefied gas detection and control device. Moreover, while saving energy, CMOS can also provide high-speed switching performance, ensuring the fast closing and opening of the solenoid valve 30. Furthermore, CMOS can be miniaturized, reducing the size of the liquefied gas detection and control device.

[0041] Optionally, the sensor module 20 includes multiple detection devices. The multiple detection devices include a gas sensor 21, a temperature sensor 22, and a pressure sensor 23. The gas sensor 21 is used to detect the target gas concentration in the environment where the liquefied gas cylinder is located; the temperature sensor 22 is used to detect the temperature in the environment where the liquefied gas cylinder is located; the pressure sensor 23 is used to detect the pressure of the liquefied gas cylinder.

[0042] In the embodiments of the present disclosure, the sensor module 20 of the liquefied gas detection and control device is provided with a plurality of detection devices. The plurality of detection devices can detect different information to ensure the safety of liquefied gas cylinders in various ways. Among them, the gas sensor 21 can detect the concentration of the target gas in the environment where the liquefied gas cylinder is located. The target gas is the main component in the liquefied gas. In this way, when the concentration of the target gas in the environment where the liquefied gas cylinder is located exceeds the concentration threshold, the control chip can timely control the solenoid valve 30 to close, so as to cut off the gas output from the liquefied gas cylinder and avoid explosion. The temperature sensor 22 can detect the temperature of the environment where the liquefied gas cylinder is located. When the temperature of the environment where the liquefied gas cylinder is located is abnormal, that is, there is a risk at the location where the liquefied gas cylinder is located, the solenoid valve 30 can also be timely controlled to close. The liquefied gas detection and control device is also provided with a pressure sensor 23. The pressure sensor 23 can detect the pressure in the liquefied gas cylinder. When overpressure or underpressure occurs in the liquefied gas cylinder, the main control chip can also timely control the solenoid valve 30 to close for timely maintenance.

[0043] Optionally, the gas sensor 21 is a semiconductor gas sensor. The gas-sensitive material of the semiconductor gas sensor is tin dioxide with a relatively low conductivity in clean air. When there is a combustible gas in the environment where the semiconductor gas sensor 21 is located, the conductivity of the sensor increases with the increase of the concentration of the combustible gas in the air. A simple circuit can be used to convert the change in conductivity into an output signal corresponding to the gas concentration. The semiconductor gas sensor has high sensitivity to propane, butane, and methane, and can better balance propane and methane. Therefore, the semiconductor gas sensor can detect a variety of combustible gases, especially liquefied gas (propane), and has a low cost, which can further reduce the cost of the liquefied gas detection and control device and improve its popularity.

[0044] Optionally, the temperature sensor 22 is a thermistor.

[0045] Optionally, the pressure sensor 23 can detect the gas pressure of 0-10 kPa. According to the national standard requirements, the rated outlet pressure of household bottled liquefied gas is 2.8 kPa, and the rated outlet pressure of commercial bottled liquefied gas is 2.8 kPa / 5.0 kPa. Therefore, the detection range of the pressure sensor 23 of 0-10 kPa can meet the detection requirements for liquefied gas cylinders.

[0046] Optionally, the main control chip 10 is integrated with an ADC (Analog-to-Digital Converter). The ADC can convert the analog signal output by the sensor module 20 into a digital signal, so as to achieve the purpose of transmitting the detection information to the main control chip 10.

[0047] Optionally, the liquefied gas detection and control device further includes a wireless NB module 40. The wireless NB module 40 is communicatively connected to the main control chip 10 and is used to report the information detected by the sensor module 20 to the Internet of Things platform.

[0048] In the embodiment of the present disclosure, the wireless NB module 40, i.e., the NB-IoT (Narrow Band Internet of Things) module, is a narrow-band Internet of Things technology based on the cellular network and is designed specifically for low-power wide-area Internet of Things (LPWA). The wireless NB module 40 is communicatively connected to the main control chip 10 and is used to report the information detected by the sensor module 20 to the Internet of Things platform. In this way, when the control chip detects liquefied gas leakage, overpressure or underpressure of the liquefied gas cylinder, or abnormal temperature, the alarm information and the information for closing the solenoid valve 30 are reported to the Internet of Things platform in real time, and the alarm and valve-closing information is informed to the user in the form of a phone call and a text message through the Internet of Things platform. The NB-IoT technology has functions such as event reporting, instruction issuing, device data and device information reporting, etc., which realizes the access of physical layer devices to the application layer, facilitating unified management. In this way, the liquefied gas cylinders can be uniformly managed, and it is convenient for users to remotely detect liquefied gas leakage and handle it in time.

[0049] In the embodiment of the present disclosure, the wireless NB module is used for wireless communication to connect physical layer hardware devices to the application layer, thereby realizing Internet of Things communication and data information transmission. In addition, the use of the wireless NB module has relatively low power consumption, which can also reduce the power consumption of the liquefied gas detection and control device and increase the usage duration and service life of the liquefied gas detection and control device.

[0050] Optionally, the liquefied gas detection and control device further includes a power supply module. The power supply module includes a power supply battery 41 and a low-dropout linear voltage regulator 42. The power supply battery 41 is electrically connected to the main control chip 10, and the power supply battery 41 is used to supply power to the main control chip 10; the low-dropout linear voltage regulator 42 is connected between the power supply battery 41 and the main control chip 10.

[0051] In the embodiment of the present disclosure, the power supply module is powered by the power supply battery 41, which can realize wireless power supply. Compared with the wired power supply method, the position layout of the liquefied gas detection and control device is not affected and restricted by spatial factors, which can ensure the mobility of the liquefied gas cylinder. In addition, the low-dropout linear voltage regulator 42 is an electronic circuit used to provide a stable DC voltage output, which can stabilize the output voltage of the power supply battery 41 to ensure the stable operation of the liquefied gas detection and control device.

[0052] Optionally, the power supply module further includes a backup battery 43. The backup battery 43 can provide power to the main control chip 10 when the power of the power supply battery 41 is low to ensure the normal use of the liquefied gas detection and control device and facilitate the user to replace the power supply battery 41.

[0053] Optionally, the power supply battery 41 is a lithium battery. Specifically, the power supply battery 41 is a 3.6V lithium battery.

[0054] Optionally, the power module is electrically connected to the wireless NB module 40 to supply power to the wireless NB module 40.

[0055] Optionally, the power module is adapted to be connected to an external power supply.

[0056] In the embodiments of the present disclosure, the power module can also be powered in a wired power supply manner. The power module can be externally connected to an AC 220V power supply, and the main control chip 10 is powered through an AC 220V to DC 5V power plug and a DC 5V to DC 3.3V LDO (Low Dropout Linear Regulator) circuit. In this way, the liquefied gas detection and control device can be powered in two power supply modes: wireless power supply and wired power supply, improving the power supply stability.

[0057] Optionally, a timer is integrated in the main control chip 10 of the liquefied gas detection and control device. The timer can be used to control the liquefied gas detection and control device to periodically perform tasks such as sensor detection, so that the main control chip 10 controls the sensor module 20 to work.

[0058] In the embodiments of the present disclosure, most of the components on the circuit board are in a sleep state. A timer is provided in the main control chip 10 of the liquefied gas detection and control device. The main control chip 10 is awakened from the sleep state through a timer interrupt. After being awakened, the main control chip 10 will execute work tasks, such as performing sensor detection, etc., and send the detection results to the platform periodically through the wireless NB module 40. Then, the main control chip 10 will enter the sleep state again. This can reduce the energy consumption of the liquefied gas detection and control device and improve the service life of the power module.

[0059] Optionally, the timer is an RTC clock (Real-Time Clock). The RTC clock can provide accurate time information and can maintain the time accuracy even when the system is powered off, improving the stability and reliability of the liquefied gas detection and control device.

[0060] Optionally, some circuit components of the circuit board are powered off through the GPIO (General-Purpose Input / Output) when the main control chip 10 is in the sleep state, so as to achieve a better low-power effect.

[0061] Optionally, the liquefied gas detection and control device further includes a display module 50. The display module 50 includes a liquid crystal display screen 51 and / or an indicator light 52. The liquid crystal display screen 51 is electrically connected to the main control chip 10 and is used to display the working information of the liquefied gas detection and control device; the indicator light 52 is electrically connected to the main control chip 10 and is used to prompt the working information of the liquefied gas detection and control device.

[0062] In the embodiments of the present disclosure, the liquid crystal display screen 51 has the advantage of low power consumption. The liquid crystal display screen 51 can not only display numerical information such as the concentration of liquefied gas in the air, temperature, gas cylinder pressure, time, etc., but also prompt states such as alarm, fault, operation, power failure, etc. through the indicator light 52. While ensuring low power consumption, the liquid crystal display screen 51 has various display contents.

[0063] Optionally, the liquid crystal display screen 51 is an LED display screen, and the indicator light 52 is an LED indicator light 52, which can reduce the power consumption of the liquefied gas detection and control device.

[0064] In the embodiments of the present disclosure, the sensor module 20, the display module 50, and the main control chip 10 all adopt low-power settings. In this way, after the liquefied gas detection and control device enters the low-power state, the power consumption current in the standby state is less than 40 uA. This can greatly improve the service life of the power supply battery 41 and eliminate the need for frequent battery replacement.

[0065] Optionally, the liquefied gas detection and control device further includes a silencing and self-checking key 53, which is electrically connected to the main control chip 10 and is used to control the main control chip 10 for silencing and self-checking.

[0066] Optionally, the display module 50 and the main control chip 10 are electrically connected by using GPIO (General Purpose Input / Output) technology.

[0067] Optionally, the liquefied gas detection and control device further includes a voice alarm device 31, which is electrically connected to the main control chip 10 and is used to issue a voice to prompt the user.

[0068] In the embodiments of the present disclosure, when the sensor module 20 detects abnormal situations such as leakage, abnormal temperature, overpressure, or underpressure of the liquefied gas cylinder, the control chip can not only control the solenoid valve 30 to close, but also control the voice alarm device 31 to issue a warning to prompt the user to discover the fault in time and perform maintenance in time. Optionally, the voice can be a beeping sound or a human voice prompt, etc.

[0069] Optionally, the liquefied gas detection and control device further includes a data reading module 60, which is electrically connected to the main control chip 10.

[0070] Optionally, the data reading module 60 includes a debugging serial port 61 and a reserved RS485 interface 62. The debugging serial port 61 is a serial communication interface for debugging purposes, allowing developers to communicate with the embedded system or microcontroller through a computer, which facilitates users to read and analyze historical records such as liquefied gas alarms. The reserved RS485 interface 62 is used for reliable serial communication in long-distance and high-noise environments. Using differential signal transmission, it has stronger anti-interference ability than traditional RS232 or TTL serial communication, which can improve the anti-interference ability of the liquefied gas detection and control device and ensure the stability of data information transmission.

[0071] Optionally, the data reading module 60 and the main control chip 10 implement data communication using UART (Universal Asynchronous Receiver / Transmitter) technology.

[0072] Optionally, as Figures 2 to 3 shown, the liquefied gas detection and control device further includes a housing 70, the housing 70 defines a cavity, and the main control chip 10 and the sensor module 20 are located inside the cavity; wherein, the housing 70 is provided with ventilation holes to enable air to enter the cavity.

[0073] In the embodiments of the present disclosure, the method of hiding the sensor module 20 inside the device and leaving ventilation holes can ensure the beauty of the liquefied gas detection and control device without affecting the diffusion and real-time accurate detection of liquefied gas.

[0074] Optionally, the liquefied gas detection and control device further includes a circuit board 78, the circuit board 78 is located inside the cavity, and the main control chip 10 and the sensor module 20 are both provided on the circuit board 78.

[0075] Optionally, the gas sensor 21, the temperature sensor 22, and the pressure sensor 23 are welded to the circuit at intervals.

[0076] Optionally, the sensor module 20 is provided on one side of the circuit board 78 facing the ventilation holes to facilitate the detection of the gas flowing into the cavity.

[0077] Optionally, the main control chip 10 is welded to the circuit board 78.

[0078] Optionally, the sensor module 20 is provided on the side of the circuit board 78 facing away from the ventilation holes, and there is a gap between the circuit board 78 and the housing 70, so that the gas flowing in through the ventilation holes can flow around the circuit board 78 and then reach the sensor module 20, which can avoid the accumulation of oil fume in the air flow on the probe of the sensor module 20, affect the detection accuracy, and improve the service life of the sensor module 20.

[0079] Optionally, when the sensor module 20 is disposed on the side of the circuit board 78 away from the ventilation holes, the circuit board 78 is provided with ventilation holes so that the airflow flowing in through the ventilation holes can pass through the ventilation holes and flow to the sensor module 20.

[0080] Optionally, the ventilation holes are provided on the front side wall 73 of the housing 70, and the number of the ventilation holes is multiple. The multiple ventilation holes are spaced apart on the front side wall 73 of the housing 70.

[0081] Optionally, the multiple ventilation holes include a first ventilation hole 71 and a second ventilation hole 72. The first ventilation hole 71 is provided at the outer edge of the housing 70, and the multiple first ventilation holes 71 are arranged in a ring along the circumferential direction of the front side wall 73 of the housing 70. The second ventilation hole 72 is located inside the first ventilation hole 71, and the number of the second ventilation holes 72 is multiple. The multiple second ventilation holes 72 form multiple annular ventilation hole groups to increase the inflow of gas.

[0082] Optionally, the display module 50 is disposed on the front side wall 73 of the housing 70.

[0083] In the embodiment of the present disclosure, the display module 50 is disposed on the front side wall 73 of the housing 70, which is convenient for the user to observe and operate the liquefied gas detection and control device.

[0084] Optionally, the liquid crystal display screen 51 is located in the upper middle part of the front side wall 73 of the housing 70 so as to facilitate the user to observe the liquid crystal display screen 51.

[0085] Optionally, the liquid crystal display screen 51 is located above the second ventilation hole 72.

[0086] Optionally, the number of the indicator lights 52 is multiple, and the multiple indicator lights 52 are arranged side by side on the front side wall 73 of the housing 70.

[0087] Optionally, the multiple indicator lights 52 include an alarm indicator light 52, an operation indicator light 52, and a fault indicator light 52.

[0088] Optionally, the colors of the multiple indicator lights 52 are different.

[0089] Exemplarily, the alarm indicator light 52 is red, the operation indicator light 52 is green, and the fault indicator light 52 is yellow.

[0090] Optionally, the mute self-check key 53 is disposed below the indicator light 52.

[0091] Optionally, the housing 70 is further provided with a sound transmission hole 74, and the sound transmission hole 74 corresponds to the voice alarm device 31. In this way, when the voice alarm device 31 works, the alarm sound can be transmitted out through the sound transmission hole 74 to prompt the user to process the fault in time.

[0092] Optionally, the rear side wall 75 of the housing 70 is configured with an installation cavity, and the power supply battery 41 is installed in the installation cavity.

[0093] Optionally, a SIM card slot is further configured on the bottom wall of the installation cavity. The SIM card slot is used to install an IoT card to realize the communication connection between the wireless NB module 40 and the main control chip 10.

[0094] Optionally, a control valve wire interface 32 is further configured on the rear side wall 75 of the housing 70. The solenoid valve 30 is electrically connected to the main control chip 10 through a control valve wire, and the control valve wire passes through the control valve wire interface 32 and is connected to the main control chip 10.

[0095] Optionally, the peripheral side wall 77 of the housing 70 is connected between the front side wall 73 and the rear side wall 75 of the housing 70. A power supply interface 44 is further configured on the peripheral side wall 77 of the housing 70. The power supply interface 44 is used for external power supply.

[0096] Optionally, a third ventilation hole 76 is formed in the rear side wall 75 of the housing 70. Gas can also enter the cavity through the third ventilation hole 76 in the rear side wall 75 of the housing 70 and then flow to the sensor module 20. The ventilation holes include the third ventilation hole 76.

[0097] The above description and the drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural and other changes. The embodiments only represent possible variations. Unless explicitly required, the individual components and functions are optional, and the order of operations can vary. Parts and features of some embodiments may be included in or substituted for parts and features of other embodiments. The embodiments of the present disclosure are not limited to the structures already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. A liquefied gas detection and control device for a liquefied gas cylinder, characterized in that: include: Main control chip; The sensor module is electrically connected to the main control chip and is used to detect the information of the liquefied gas and / or the information of the liquefied gas cylinder, and transmit the detected information of the liquefied gas and / or the information of the liquefied gas cylinder to the main control chip; The solenoid valve is electrically connected to the main control chip and is used to control the on and off of the gas source of the liquefied gas cylinder, and the main control chip can control the opening and closing of the solenoid valve according to the information detected by the sensor module.

2. The liquefied gas detection control device according to claim 1, characterized in that: The sensor module includes a plurality of detection devices, and the plurality of detection devices include: Gas sensor, used to detect the target gas concentration in the environment of the liquefied gas cylinder; Temperature sensor, used to detect the temperature of the liquefied gas cylinder; Pressure sensor, used to detect the pressure inside the liquefied gas cylinder.

3. The liquefied gas detection and control device according to claim 1, characterized in that: Also includes: The wireless NB module is connected to the main control chip for reporting the information detected by the sensor module to the Internet of Things platform.

4. The liquefied gas detection and control device according to claim 1, characterized in that: It also includes a power module, which includes: A power supply battery is electrically connected to the main control chip and is used to supply power to the main control chip and some circuit components; A low voltage dropout linear regulator is connected between the power supply battery and the main control chip.

5. The liquefied gas detection control device according to claim 4, characterized in that: The power module also includes: A backup battery, used to supply power to the main control chip when the power supply battery is low on power; and / or, The power module is adapted to be in communication with an external power source.

6. The liquefied gas detection and control device according to claim 1, characterized in that: Also includes: The timer is integrated inside the main control chip and is used to periodically wake up the main control chip so that the main control chip can process work tasks.

7. The liquefied gas detection control device according to claim 4, characterized in that: Also includes a display module, the display module includes: A liquid crystal display screen, electrically connected to the main control chip, for displaying the working information of the liquefied gas detection and control device; and / or, The display module includes: The indicator light is electrically connected to the main control chip and is used to display the working information of the liquefied gas detection control device.

8. The liquefied gas detection and control device according to claim 7, characterized in that: Also includes: The housing defines a cavity, and the main control chip and the sensor module are both located in the cavity; The shell is provided with air holes so that gas can enter the cavity through the air holes.

9. The liquefied gas detection and control device according to claim 8, characterized in that: The display module is disposed on the front side wall of the housing; and / or, The rear side wall of the shell is configured with a mounting groove, and the power supply battery is located in the mounting groove.

10. The liquefied gas detection and control device according to any one of claims 1 to 9, characterized in that: Also includes: The voice alarm module is electrically connected to the main control chip and is used to issue voice prompts to the user; and / or, The data reading module is electrically connected to the main control chip and is used for storing and reading historical records.

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