Residential kitchen gas stove delayed gas cut-off protection system

Abstract

The utility model discloses a delayed gas cut-off protection system for a residential kitchen gas stove, which is characterized in that a gas pipeline opening and closing stop valve and a gas pipeline electric valve are sequentially mounted on a gas pipeline in series, and an inductive switch controller and a time relay are respectively mounted on one side of an inductive switch; the load output end of the inductive switch controller is connected to the input end of the time relay and the input end of the smoke exhaust ventilator through lines. The output end of the time relay is connected with the input end of the gas pipeline electric valve through a line I; the signal acquisition end of the inductive switch controller is also connected with an inductive switch through a circuit; the inductive switch is installed at the position close to the gas pipeline opening and closing stop valve. During cooking, the gas pipeline stop valve, the interlocking inductive switch, the interlocking starting exhaust fan and the interlocking starting time relay are manually opened. If the fire is forgotten to be turned off and the set time is exceeded, the electric stop valve is automatically closed to prevent the pot from being burnt out, so that fire accidents are prevented.

Description

Technical Field

[0001] This utility model relates to a delayed gas shut-off protection system, specifically a delayed gas shut-off protection system for residential kitchen gas stoves. Background Technology

[0002] Kitchen fires are frequent in residential buildings in my country, mainly caused by careless use of fire and gas leaks. Gas leak prevention is currently addressed by gas companies through free installation of gas shut-off valves and combustible gas detectors, as well as regular pipeline inspections and replacements. However, careless use of fire remains a significant concern, largely due to cooks, especially the elderly who are prone to forgetfulness. They may leave the stove on while doing other things, leading to fires. This delayed gas shut-off protection system for kitchen gas stoves was developed to address this issue and has broad application prospects. Utility Model Content

[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a delayed gas shut-off protection system for residential kitchen gas stoves.

[0004] According to the technical solution provided in the embodiments of this application, a residential kitchen gas stove delayed gas shut-off protection system includes a gas pipeline, a gas pipeline opening and closing valve, an induction switch, an induction switch controller, a time relay, and a gas pipeline electric valve. The gas pipeline opening and closing valve and the gas pipeline electric valve are installed in series on the gas pipeline. The induction switch controller and the time relay are respectively installed on one side of the induction switch.

[0005] The load output terminal of the inductive switch controller is connected to the input terminals of the time relay and the range hood via lines, respectively.

[0006] The output terminal of the time relay is connected to the input terminal of the gas pipeline electric valve via line one.

[0007] An inductive switch is also connected to the signal acquisition terminal of the inductive switch controller via a line.

[0008] The inductive switch is installed near the gas pipeline's opening and closing valve.

[0009] In this invention, the power input terminal of the inductive switch controller is connected to the mains power.

[0010] In this invention, the inductive switch controller has a built-in AC / DC conversion module, which provides 12V DC power to the probe.

[0011] In this utility model, the first line adopts the BV-3*1.5-JDG20 specification.

[0012] In this utility model, the circuits other than the first circuit adopt the BV-2*1.5-JDG20 specification.

[0013] This kitchen gas stove delayed gas shut-off protection system consists of a sensor switch and its controller and wiring, a time relay and its wiring, a gas on / off valve, and an exhaust and smoke extraction system (converted into a range hood) and its wiring. Initially, the electric valve is open, and the gas pipeline shut-off valve is closed. During cooking, the gas pipeline shut-off valve is manually opened, the sensor switch (i.e., the probe) is not obstructed, the sensor switch activates, and the load output current of the sensor switch controller powers the electrical equipment downstream of the load. The exhaust fan (also used as a range hood) vents, the time relay is energized and the timer starts, the normally closed L1 circuit of the time relay is powered, and the electric valve is open. When the timer reaches the set time, the normally closed L1 circuit of the time relay opens, the normally open L2 circuit closes, and the electric valve closes. If cooking is completed within the time set by the timer, the gas pipeline shut-off valve is manually closed, the sensor switch is obstructed, the sensor switch activates, the load of the sensor switch controller stops outputting current, the electrical equipment downstream of the load is de-energized, the exhaust fan turns off, and the timer resets to zero.

[0014] In summary, the beneficial effects of this application are as follows:

[0015] 1. When cooking, manually open the gas pipeline shut-off valve, which will interlock with the sensor switch, start the exhaust fan (which also functions as a range hood), and activate the time relay. In other words, the exhaust fan (range hood) starts simultaneously with the opening of the gas pipeline shut-off valve, effectively removing any leaking gas before ignition.

[0016] Second, if the stove is left on for too long and the set time has elapsed, the electric shut-off valve will automatically close to prevent the pot from burning dry and thus prevent a fire. Attached Figure Description

[0017] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0018] Figure 1 A schematic diagram showing the installation locations of components in the delayed gas shut-off protection system for a kitchen gas stove.

[0019] Figure 2 A schematic diagram of the control lines for the delayed gas shut-off protection system of a kitchen gas stove.

[0020] Numbering on the map:

[0021] Gas pipeline - 1; Gas pipeline on / off valve - 2; Induction switch - 3; Induction switch controller - 4; Time relay - 5; Gas pipeline electric valve - 6; Range hood - 7. Detailed Implementation

[0022] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] like Figure 1 and Figure 2 As shown, this is a residential kitchen gas stove delayed gas shut-off protection system. This system consists of a gas pipeline on / off valve 2, an induction switch 3 and an induction switch controller 4 and wiring, a time relay 5 and wiring, a gas pipeline electric valve 6, and a range hood 7 (which also functions as a range hood).

[0025] In this embodiment, the induction switch 3 and the induction switch controller 4 are model LP5818, the time relay 5 is preferably a digital display DH48S series, and the gas pipeline electric valve 6 is preferably model FVQ11S-32.

[0026] The DH48S series digital display time relay (hereinafter referred to as the relay) is a power-on delay type, suitable for use as a delay element in control circuits with AC 47-63Hz, operating voltage below 265V, or operating voltage of 12V or 24V. Internally, it uses a high-performance microcomputer chip as the core component, a solid oscillator as the clock source, and a high-brightness LED as the display component. It features good anti-interference performance and high delay accuracy. Standard panel size: DIN48x48mm. Capable of both clockwise and countdown timers. The product complies with relevant standards such as GB14048.5-2000 and JB / T10047-1999.

[0027] In the initial state, attached Figure 2 The electric valve is in the open position, and the gas pipeline shut-off valve 2 is in the closed position. When cooking, the gas pipeline shut-off valve 2 is manually opened. The sensor switch (i.e., probe) 3 is not obstructed, and the sensor switch 3 activates. This activates the load output current of the sensor switch controller 4, supplying power to the electrical equipment downstream of the load. The exhaust fan (also used as a range hood) then exhausts air, and the time relay 5 is energized to start timing. Figure 2 The normally closed circuit L1 of the time relay is powered, and the gas pipeline electric valve 6 is in the open state. When the time relay 5 reaches the set time, the normally closed circuit L1 of the time relay opens, the normally open circuit L2 closes to supply power, and the gas pipeline electric valve 6 closes. If cooking is completed within the time set by the time relay 5, the auxiliary valve can be manually closed. Figure 2When the gas pipeline opening and closing valve 2 is blocked, the induction switch 3 is activated. Then, the load of the induction switch controller 4 no longer outputs current, that is, the electrical equipment downstream of the load is de-energized, the exhaust fan is turned off, and the timer is reset to zero.

[0028] When cooking, manually open the gas pipeline shut-off valve 2. This activates the sensor switch 3, interlocking and starting the exhaust fan (which also functions as a range hood), and the time relay 5 begins timing. In other words, the exhaust fan (range hood) starts simultaneously with the opening of the gas pipeline shut-off valve 2, effectively venting leaked gas before ignition. This is one of the fire safety protection functions of this system (its advantage is that even if there is a small gas leak in the kitchen, it will be vented before ignition, compensating for the failure of the self-closing valve or alarm. Even in kitchens without self-closing valves and alarms, leaked gas can still be effectively vented, as kitchens are generally small in size). The second fire safety protection function of this system is as follows: When cooking, manually opening the gas pipeline shut-off valve 2 will activate the sensor switch 3, interlocking and starting the exhaust fan. The time relay 5 will then begin timing. Based on calculations of cooking time for elderly people, the time is generally set to around 20 minutes (elderly people tend to eat simpler meals, but this can be customized; the time relay time is adjustable). If the stove is left on for longer than the set time, the gas pipeline electric valve 6 will automatically close, cutting off the gas supply, extinguishing the flame, and preventing the pot from burning dry, thus preventing a fire. If the gas pipeline is closed and you wish to continue cooking, you can open and close the gas pipeline shut-off valve 2 once; the electric valve will automatically release, and the second timing will begin. (Because the stove was forgotten and the set time was exceeded, time relay 5 is still timing, the exhaust fan (also used as a range hood) is still in exhaust mode, and the gas pipeline electric valve 6 is in the closed state. If cooking continues, gas pipeline shut-off valve 2 is manually closed, sensor switch 3 is blocked, and the load of sensor switch controller 4 no longer outputs current, meaning the electrical equipment downstream of the load is de-energized, the exhaust fan turns off, and the timer resets to zero. Gas pipeline shut-off valve 2 is manually opened, sensor switch 3 is not blocked, and the load of sensor switch controller 4 outputs current, meaning the electrical equipment downstream of the load is powered, time relay 5 is energized, and timing begins. (See attached...)) Figure 2 When the normally closed L1 circuit is powered, the electric valve is energized and opened, the gas is connected, the time relay 4 reaches the set time, the normally closed L1 circuit of the time relay opens, the normally open L2 circuit closes and powers on, and the electric valve 6 of the gas pipeline closes.

[0029] The above description is merely a preferred embodiment of this application and an explanation of the technical principles and solutions employed. Furthermore, the scope of the utility model involved in this application is not limited to the specific combination of the above-described technical features, but should also cover other technical solutions formed by any combination of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A delayed gas shut-off protection system for a residential kitchen gas stove, comprising a gas pipeline (1), a gas pipeline gate valve (2), an induction switch (3), an induction switch controller (4), a time relay (5), and a gas pipeline electric valve (6), characterized in that: The gas pipeline (1) is connected in series with a gas pipeline gate valve (2) and a gas pipeline electric valve (6). The induction switch (3) is connected in series with an induction switch controller (4), a time relay (5) and a gas pipeline electric valve (6). The load output terminal of the inductive switch controller (4) is connected to the input terminal of the time relay (5) and the range hood (7) respectively via lines; The output terminal of the time relay (5) is connected to the input terminal of the gas pipeline electric valve (6) via line one; The inductive switch (3) is also connected to the signal acquisition terminal of the inductive switch controller (4) via a line; The induction switch (3) is installed near the gas pipeline opening and closing valve (2).

2. The residential kitchen gas stove delayed gas shut-off protection system according to claim 1, characterized in that: The power input terminal of the inductive switch controller (4) is connected to the mains power.

3. The residential kitchen gas stove delayed gas shut-off protection system according to claim 1, characterized in that: The inductive switch controller (4) has an AC / DC conversion module built in, which provides 12V DC power to the inductive switch (3).

Images