CN210069942U

CN210069942U - Domestic gas safety valve capable of automatically delaying cut-off of gas

Info

Publication number: CN210069942U
Application number: CN201920347983.4U
Authority: CN
Inventors: 郭祯翔
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-03-19
Filing date: 2019-03-19
Publication date: 2020-02-14
Anticipated expiration: 2029-03-19

Abstract

The utility model discloses a domestic gas relief valve that automatic time delay of gas cut off belongs to gas-cooker technical field, including the gas-cooker, the gas-cooker both ends are provided with human inductor respectively, and human inductor is connected with the timer of setting on the gas-cooker panel, timer and gas-cooker controller communication connection, gas-cooker controller and a solenoid valve communication connection, the intercommunication of solenoid valve control gas pipeline and gas-cooker, the on-off state that the timer passes through gas-cooker controller control solenoid valve. The utility model discloses can take precautions against and forget all kinds of potential safety hazards that cause under the circumstances such as close the gas-cooker, can effectively carry out all-round protection to gas safety at home, save manpower and materials, stop the potential safety hazard.

Description

Domestic gas safety valve capable of automatically delaying cut-off of gas

Technical Field

The utility model relates to a domestic gas relief valve that automatic time delay of gas cut off belongs to gas-cooker technical field.

Background

Through the exchange investigation to gas company and relevant gas product dealer, relevant product has been searched from the online simultaneously, and at present, the relevant product in the aspect of common family gas safety in utilization on the market can be divided into two kinds:

one is that the electromagnetic cut-off valve is combined with gas leakage alarm, when the gas leakage reaches a certain concentration, the alarm gives an alarm and the cut-off valve is closed, mainly used for detecting the leakage concentration and preventing explosion;

the second type is a gas stove with flameout protection, which automatically flameout and close the valve for ventilation when boiling water.

The two safety valves prevent the extreme case of leakage to a certain concentration or a large amount of leakage. Many people have encountered such situations: when cooking at home, the cooking stove can not be kept at all times. Food is put into the pot, the user is busy in the process of waiting for the food to be cooked, sometimes forgets that the kitchen stove is still on fire, and finds that the food is burnt when thinking. This is more common when elderly people are cooking at home. Such a situation not only wastes well prepared food, but can also cause a fire hazard, causing even greater harm.

For the above situation, neither of the above two protection measures can be effectively protected.

SUMMERY OF THE UTILITY MODEL

According to the not enough of above prior art, the utility model discloses a solve the problem among the above-mentioned technique, provide a domestic gas relief valve that automatic time delay of gas cut off.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the household gas safety valve comprises a gas stove, wherein human body sensors are respectively arranged at two ends of the gas stove and are connected with a timer arranged on a panel of the gas stove, the timer is in communication connection with a gas stove controller, the gas stove controller is in communication connection with an electromagnetic valve, the electromagnetic valve controls communication of a gas pipeline and the gas stove, and the timer controls the opening and closing state of the electromagnetic valve through the gas stove controller.

As a preferable scheme, the human body sensor adopts a pyroelectric infrared sensor, an output end of the pyroelectric infrared sensor is connected with an input end of an operational amplifier, an output end of the operational amplifier is connected with an input end of a gas valve controller, and the gas valve controller controls the on-off of the electromagnetic valve and obtains a valve opening signal of the electromagnetic valve.

As a preferable scheme, the gas valve controller is further connected with a temperature sensor, and the gas valve controller displays the temperature of the temperature sensor and the remaining time of the timer through a liquid crystal display screen arranged on a panel of the gas stove.

Preferably, the gas valve controller is also communicated with a keyboard on a gas stove panel, and the keyboard can adjust the countdown time of the timer through keys.

As a preferable scheme, the human body sensor can be in communication connection with the timer through the Bluetooth module.

As a preferred scheme, the gas stove further comprises the self-extinguishing protection device, and the self-extinguishing protection device comprises a flame detector and an electromagnetic valve; the flame detector is connected with the electromagnetic valve circuit to form a control loop, the control loop is connected with the gas valve controller circuit, and the flame detector is arranged on the inner ring of the burner of the gas stove.

The utility model has the advantages that:

the utility model discloses can take precautions against and forget all kinds of potential safety hazards that cause under the circumstances such as close the gas-cooker, can effectively carry out all-round protection to gas safety at home, save manpower and materials, stop the potential safety hazard.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic circuit diagram of the temperature detecting device of the present invention;

FIG. 3 is a schematic diagram of the keyboard circuit of the present invention;

FIG. 4 is a schematic circuit diagram of the gas valve controller of the present invention;

FIG. 5 is a schematic diagram of the timer circuit of the present invention;

wherein, 1, a gas stove; 2. a liquid crystal display screen; 3. a human body sensor; 4. a keyboard; 5. a flame detector.

Detailed Description

Example 1:

referring to the attached drawings of the specification, in order to achieve the purpose, the utility model adopts the following technical scheme: the household gas safety valve capable of automatically delaying and cutting off gas comprises a gas stove 1 and is characterized in that human body sensors 3 are respectively arranged at two ends of the gas stove 1, the human body sensors 3 are connected with a timer arranged on a panel of the gas stove 1, the timer is in communication connection with a gas stove controller, the gas stove controller is in communication connection with an electromagnetic valve, the electromagnetic valve controls communication between a gas pipeline and the gas stove 1, and the timer controls the opening and closing state of the electromagnetic valve through the gas stove controller.

The human body sensor 3 adopts a pyroelectric infrared sensor, the output end of the pyroelectric infrared sensor is connected with the input end of an operational amplifier, the output end of the operational amplifier is connected with the input end of a gas valve controller, and the gas valve controller controls the on-off of the electromagnetic valve and obtains the valve opening signal of the electromagnetic valve.

The gas valve controller is also connected with a temperature sensor, and the gas valve controller displays the temperature of the temperature sensor and the remaining time of the timer through a liquid crystal display screen 2 arranged on a panel of the gas stove 1.

The gas valve controller is also communicated with a keyboard 4 on a panel of the gas stove 1, and the keyboard 4 can adjust the countdown time of the timer through keys.

The human body sensor 3 can also be in communication connection with the timer through the Bluetooth module.

The gas stove 1 also comprises the self-extinguishing protection device, and the self-extinguishing protection device comprises a flame detector 5 and an electromagnetic valve; the flame detector 5 is connected with the electromagnetic valve circuit to form a control loop, the control loop is connected with the gas valve controller circuit, and the flame detector 5 is arranged on the inner ring of the burner of the gas stove 1.

The invention relates to a household gas safety valve capable of meeting the requirement of automatic delayed gas cutoff, which has an overtime automatic closing function and an infrared artificial detection function.

The design principle and the operation steps are as follows:

when a person opens the valve to ignite, a valve opening signal is output to the gas valve controller, the human body sensor 3 is started, the human body sensor 3 adopts a pyroelectric infrared sensor, and when the person cannot move in an infrared sensing range, the timer is started. The time can be set through the keys of the keyboard 4, and the operation is convenient and fast. After the timer is started, if the activity of the personnel is sensed again, the timer is reset, when the timer reaches the set time, the gas valve controller outputs a valve closing signal, and the electromagnetic valve is closed.

Specifically, for example, the user needs to use the gas stove 1 to cook soup at night, but needs to leave temporarily after a while, the timing time of the timer can be set to 30 minutes, and in the time range, the electromagnetic valve is in a communication state, and the gas pipeline is opened. In the period of time, the user can use the fuel gas; outside the time range, the electromagnetic valve is in a disconnected state, and the gas pipeline is disconnected, so that the condition of gas leakage caused by the failure of the cooker or the forgetting of closing the cooker by the user can be avoided.

The gas valve controller is a single chip microcomputer or a programmable controller. The single chip computer is an integrated circuit chip, and is a small and perfect microcomputer system formed by integrating the functions of CPU RAM, ROM, various I/O ports, interrupt system, timer/timer, etc. (may also include display driving circuit, pulse width modulation circuit, analog multiplexer, A/D converter, etc.) with data processing capacity on a silicon chip by adopting super large scale integrated circuit technology, and is widely applied in the field of industrial control. From the 80 s of the last century, the current 32-bit 300M high-speed single chip microcomputer is developed by 4-bit and 8-bit single chip microcomputers. The Programmable Controller is abbreviated as PC (Programmable Logic Controller) and goes through several different periods of Programmable matrix Controller PMC, Programmable sequence Controller PSC, Programmable Logic Controller PLC and Programmable Controller PC. The single chip microcomputer or the programmable controller has low price, good stability and strong universality.

The gas range 1 further comprises a power source. The power supply can be a storage battery, a dry battery or be connected to the commercial power through a power adapter.

The human body sensor 3 comprises a human body infrared sensor, a Fresnel lens and an integrated circuit. When a person leaves the detection area, the sensor can transmit the detected signal to the gas valve controller, and the gas valve controller judges whether the electromagnetic valve is closed according to the actual situation.

The integrated circuit is a digital-analog mixed special integrated circuit composed of an operational amplifier, a voltage comparator, a state controller, a delay time timer and the like, when infrared rays radiated by a human body are focused on a detection element of a pyroelectric infrared sensor through a Fresnel lens, the sensor in the circuit outputs a voltage signal through a NOT gate, and then the signal firstly passes through a band-pass filter, wherein the upper limit cut-off frequency of the filter is 16Hz, and the lower limit cut-off frequency of the filter is 0.16 Hz.

Because the voltage of the detection signal output by the pyroelectric infrared sensor is very weak (usually only about 1 mV), and is a variable signal, and the action of the Fresnel lens makes the voltage of the output signal be in a pulse form (the pulse voltage is about 0.1-10 Hz), the voltage signal output by the pyroelectric infrared sensor is subjected to secondary amplification through the operational amplifiers OP1 and OP 2. After the processing by the dual discriminator composed of the voltage comparators COP1 and COP2, the effective trigger signal Vs is detected to start the timer.

The output signal is connected with the singlechip to detect, 0V low level is output when a person exists, and 5V is output after a time delay after the person leaves so as to facilitate the control of the main control circuit. The circuit design allows the chip to be in a repeatable activation state to suit the kitchen situation.

The timer can be timed by a single chip microcomputer or an external timing circuit, as shown in fig. 5, the 555 circuit is an NE555, muA 555, SL555 and other time-base integrated circuit; the diodes VT1 and VT2 are 4148 type silicon switch diodes; the resistors R1 and Rt are RTX-1/4W type carbon film resistors; the capacitor Ct is an electrolytic capacitor; the relay K can be selected according to the requirements of the electric equipment.

When the button SB is pressed, the power supply of 12V charges the capacitor Ct through the resistor Rt, so that the potential of the 6 pin continuously rises, and when the potential of the 6 pin rises to the potential of the 5 pin, the circuit reset timing ends. VD1 allows the 5-pin potential to rise due to a diode on the 5-pin string, thus allowing for longer timing than a typical connection (floating or grounded through a small capacitor).

The above embodiments are not exhaustive of the specific embodiments, and other embodiments are possible, and the above embodiments are intended to illustrate, but not limit the scope of the present invention, and all applications coming from the simple changes of the present invention fall within the scope of the present invention.

It should be noted that the terms "first," "second," and the like do not denote any order, quality, or importance, but rather are used to distinguish one technical feature from another. The modifier "about" used in connection with a quantity is inclusive of the stated value and the meaning dictated by the context. (e.g., it contains errors in measuring a particular quantity).

Claims

1. The utility model provides a domestic gas relief valve that automatic time delay of gas was cut off, includes gas-cooker (1), its characterized in that, and gas-cooker (1) both ends are provided with human inductor (3) respectively, and human inductor (3) are connected with the timer that sets up on gas-cooker (1) panel, timer and gas valve controller communication connection, gas valve controller and an solenoid valve communication connection, the intercommunication of solenoid valve control gas pipeline and gas-cooker (1), the on-off state of timer through gas valve controller control solenoid valve.

2. The household gas safety valve with automatic time delay and cut-off of gas as claimed in claim 1, characterized in that the human body sensor (3) adopts a pyroelectric infrared sensor, the output end of the pyroelectric infrared sensor is connected with the input end of an operational amplifier, the output end of the operational amplifier is connected with the input end of a gas valve controller, and the gas valve controller controls the on-off of the electromagnetic valve and obtains the valve opening signal of the electromagnetic valve.

3. The household gas safety valve with automatic time delay and cut-off of gas as claimed in claim 1, characterized in that a temperature sensor is further connected to the gas valve controller, and the gas valve controller displays the temperature of the temperature sensor and the remaining time of the timer through a liquid crystal display (2) arranged on a panel of the gas stove (1).

4. The gas safety valve for household with automatic time delay and cut-off of gas in claim 3 is characterized in that the gas valve controller is also communicated with a keyboard (4) on the panel of the gas stove (1), and the keyboard (4) can adjust the countdown time of the timer through a key.

5. The household gas safety valve capable of automatically delaying the cut-off of gas as claimed in claim 1, wherein the human body sensor (3) can be further in communication connection with the timer through a Bluetooth module.

6. The household gas safety valve with automatic time delay and cut-off of gas as claimed in claim 1, characterized in that the gas range (1) further comprises a self-extinguishing protection device, the self-extinguishing protection device comprises a flame detector (5) and an electromagnetic valve; the flame detector (5) is connected with the electromagnetic valve circuit to form a control loop, the control loop is connected with the gas valve controller circuit, and the flame detector (5) is arranged on the inner ring of the combustor of the gas stove (1).