CN111895461A

CN111895461A - Dry burning prevention device, gas stove and control method

Info

Publication number: CN111895461A
Application number: CN202010847633.1A
Authority: CN
Inventors: 王运发; 佘帅征; 王光汉; 段聪聪; 周文通; 刘梦茹
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2020-08-21
Filing date: 2020-08-21
Publication date: 2020-11-06

Abstract

The invention discloses an anti-dry-burning device which comprises a pot support, wherein the pot support is provided with a hollow cavity, a pot is placed on the pot support, an induction element is arranged in the cavity of the pot support and electrically connected with a controller, the controller is electrically connected with an electromagnetic valve, when the pot is placed on the pot support, the bottom surface of the pot is in contact with the induction element, the induction element senses related parameters of the pot and open fire, and the controller determines the opening or closing of the electromagnetic valve according to the detected parameters. Also discloses a gas stove, which comprises a panel, wherein the panel is provided with the dry burning prevention device. Also discloses a gas stove control method, which is applied to the gas stove. The invention provides a gas stove, wherein an induction element is arranged in a pot support, when a temperature sensor is completely pressed into the hollow pot support by a pot, no flame directly contacts the temperature sensor, so that the interference of flame is reduced, the precision of a temperature sensing device can be effectively improved, and the dry burning prevention performance is improved.

Description

Dry burning prevention device, gas stove and control method

Technical Field

The invention relates to the technical field of gas stoves, in particular to an anti-dry burning device, a gas stove and a control method.

Background

The household gas cooker usually uses natural gas or liquefied gas as fuel, certain potential safety hazard can exist when the household gas cooker is used improperly, especially, the household gas cooker always burns to work under the condition that no cooking materials are placed in a cooker or no cooking pot, and the combustion temperature is too high, so that the gas cooker is damaged, the cooker is damaged, and even a fire disaster is generated. In the dry-heating prevention device in the center of the prior art, a temperature sensing device is arranged at the center of a cooking range, and the dry-heating prevention function is realized by collecting the temperature of a pot bottom. However, the temperature sensing device is exposed in the flame, the flame interferes with the temperature sensing device, the accuracy of the temperature sensing device is reduced, and the problem of no pot ignition can be caused by misoperation.

Disclosure of Invention

The invention aims to provide an anti-dry heating device, a gas stove and a control method, and aims to solve the technical problems that a temperature sensor of the anti-dry heating device is easily influenced by flame and has low precision in the background technology.

In order to achieve the purpose, the specific technical scheme of the dry burning prevention device, the gas stove and the control method is as follows:

the utility model provides an prevent dry combustion method device, includes the pot support that has the cavity, places the pan on the pot support, is provided with sensing element in the cavity of pot support, and sensing element electricity is connected with the controller, and the controller electricity is connected with the solenoid valve, and when the pan was placed on the pot support, the pan bottom surface contacted with sensing element, and the controller is according to the signal determination whether to close the solenoid valve that sensing element detected.

Further, the sensing element includes temperature sensor and gravity sensor, and temperature sensor is used for detecting the temperature of pan bottom surface, and gravity sensor is used for detecting whether have the pan to place on the pot support.

Further, the induction element comprises an induction end, a limit flange is arranged at the induction end and is abutted against the inner surface of the pot support, and an elastic element is arranged on the lower surface of the induction end, so that the induction element is arranged in the cavity of the pot support.

Further, the upper surface of the pot support is provided with a through hole, the induction end protrudes out of the through hole, and when a pot is placed on the pot support, the induction element is pressed in the cavity of the pot support by the pot.

Furthermore, elastic element is the spring, and the bottom surface fixed connection of the one end of spring and response end, the inside cover of spring are equipped with the reference column.

Furthermore, a transmission line is arranged on the side wall of the induction element and electrically connected with the controller.

Further, a plurality of air holes are formed in the side wall of the pot support, a furnace end is arranged in the middle of the pot support, and the air holes are used for heat dissipation.

A gas stove comprises a bottom shell, wherein a panel is fixedly connected to the bottom shell, and the panel is provided with the dry burning prevention device.

A gas range control method applied to the gas range described above, the method comprising:

acquiring a parameter value detected by the sensing element;

the parameter value detected by the sensing element is larger than a set threshold value in the controller, and the electromagnetic valve is closed; and (4) the parameter value detected by the sensing element is smaller than a set threshold value in the controller, and the electromagnetic valve is opened.

Further, the gas stove control method further comprises the following steps:

acquiring a gravity signal detected by a gravity sensor;

starting an electromagnetic valve according to the gravity signal acquired by the controller to continuously acquire the temperature value detected by the temperature sensor;

if the detected temperature value is less than the set threshold value, the temperature sensor continues to detect the temperature value of the pot bottom;

and if the detected temperature value is greater than the set threshold value, controlling the electromagnetic valve to close.

The dry burning prevention device, the gas stove and the control method have the following advantages:

the invention provides a dry-burning-prevention gas stove, wherein a pot support is provided with a hollow cavity, an induction element is arranged in the support, and the back of the hollow support is provided with a vent hole for air circulation; through the combination of gravity and temperature, the switch of control solenoid valve does not need the thermocouple, and reduce cost, and can accomplish no pot and not ignite, improve gas-cooker security performance, prevent accidental operation or mistake and touch the ignition and injure the user.

Drawings

FIG. 1 is a schematic structural view of an anti-dry heating apparatus according to the present invention;

FIG. 2 is a front view of the dry burning prevention device of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2;

FIG. 4 is a cross-sectional view of the dry-fire prevention device of the present invention;

FIG. 5 is a partial enlarged view of B in FIG. 4;

fig. 6 is a control method of a gas range of the present invention.

The reference numbers in the figures illustrate: 1. a pan support; 2. an inductive element; 21. a temperature sensor; 22. a gravity sensor; 23. a flange; 24. a transmission line; 25. a spring; 26. a positioning column; 3. a burner; 4. a furnace end; 5. a vent hole; 6. a controller; 7. an electromagnetic valve; 8. a pot.

Detailed Description

In order to better understand the purpose, structure and function of the present invention, the dry-burning prevention device, the gas stove and the control method of the present invention are further described in detail with reference to the accompanying drawings.

As shown in fig. 1, the present invention provides an anti-dry heating device, which comprises a pot support 1 having a hollow cavity, wherein an induction element 2 is arranged in the cavity of the pot support 1, the induction element 2 is electrically connected to a controller 6, when a pot 8 is placed on the pot support 1, the bottom surface of the pot 8 contacts with the induction element 2, and the controller 6 determines whether to close an electromagnetic valve 7 according to a signal detected by the induction element 2.

As shown in fig. 2 to 5, the sensing element 2 includes a sensing end, the sensing end is provided with a limit flange 23, the limit flange 23 abuts against the inner surface of the pan support 1, the lower surface of the sensing end is provided with an elastic element, and the elastic element is sleeved with a positioning column 26, so that the sensing element 2 is arranged in the cavity of the pan support 1.

The upper surface of the pot support 1 is provided with a through hole, and the sensing end protrudes out of the through hole, so that when the pot 8 is placed on the pot support 1, the pot 8 presses the sensing element 2 into the cavity of the pot support 1 under the action of gravity.

The elastic element is a spring 25, one end of the spring 25 is fixedly connected with the bottom surface of the induction end, a positioning column 26 is sleeved inside the spring 25, and when the induction element 2 is pressed into the cavity of the pot support 1 by the pot 8, the spring 25 is compressed; when the induction element 2 does not receive the action of gravity, the spring 25 is reset under the action of elasticity, the induction end is ejected out of the through hole, and the limiting flange 23 is abutted against the inner surface of the pot support 1.

Further, a transmission line 24 is arranged on the side wall of the induction element 2, the transmission line 24 is electrically connected with the controller 6, the transmission line 24 is used for transmitting data to the controller 6, the controller 6 is electrically connected with the electromagnetic valve 7, and the electromagnetic valve 7 controls whether air is supplied or not.

The sensing element 2 comprises a temperature sensor 21 and a gravity sensor 22, the temperature sensor 21 is used for detecting the temperature of the bottom surface of the pot 8, and the gravity sensor 22 is used for detecting whether the pot 8 is placed on the pot support 1.

Be provided with a plurality of air vents 5 on the lateral wall of pot support 1, the middle part of pot support 1 is provided with combustor 3, is provided with furnace end 4 in the combustor 3, and a plurality of air vents 5 are used for the heat dissipation. Preferably, a plurality of vent holes 5 are vertically arranged on the side wall of the pot support 1 in sequence.

In order to prevent the temperature sensor 21 from failing, a plurality of temperature sensors 21 are provided on the side wall of the pot support 1.

The temperature sensor 21 and the gravity sensor 22 provided by the invention are arranged in the hollow support cavity to avoid the influence of open fire interference on the dry burning prevention precision.

The invention provides a gas stove which comprises a bottom shell, wherein a panel is fixedly connected to the bottom shell, and the panel is provided with the anti-dry-burning device.

As shown in fig. 6, the present invention further provides a control method of a gas stove, comprising the following steps:

step S1: acquiring a detection signal of the gravity sensor 22; if so, go to step S2; if no signal is output, repeatedly executing step S1;

step S2: the controller 6 opens the electromagnetic valve 7, allows ignition, and executes step S3;

step S3: acquiring a temperature signal detected by the temperature sensor 21, and judging whether the dry burning condition is met currently or not according to the temperature signal;

specifically, the temperature signal is transmitted to the controller 6, the temperature of the bottom surface of the pot 8 is compared with a set threshold value, whether the temperature of the bottom surface of the pot exceeds the set threshold value or not is judged, if the temperature exceeds the set threshold value, the pot is judged to be in a dry-burning state, the electromagnetic valve 7 is shut off, and the air source is cut off; if the temperature is smaller than the set threshold value, the temperature sensor 21 continues to detect the temperature of the pot bottom.

Preferably, the threshold value is set to 300 ℃, when the temperature of the pot bottom detected by the temperature sensor 21 is more than 300 ℃, the pot is judged to be in a dry-burning state, the pot is flamed out, and the electromagnetic valve 7 is closed; if the temperature detected by the temperature sensor 21 is less than 300 ℃, the temperature sensor 21 continues to detect the excessively low temperature.

When a user places a pot 8 on the hollow pot support 1, the sensing element 2 retracts downwards under the action of the pot until the sensing element is completely immersed in the pot support 1, the sensing end of the sensing element 2 is directly contacted with the bottom of the pot, the gravity sensor 22 receives a signal and transmits the signal to the controller 6, the controller 6 receives an output signal of the gravity sensor 22 and judges that the pot is on the stove, and the controller 6 opens the electromagnetic valve 7 and allows ignition; when the cooker 8 is in the state of allowing ignition, if the temperature sensor 21 does not acquire temperature change information within the set time t1, the controller 6 judges that the cooker is in the state of no ignition and no cooking, closes the electromagnetic valve 7, cuts off the air inlet source, resets the gravity sensor 22, and returns to the initial state after resetting by taking up the cooker 8 and putting down the cooker, so that the ignition and cooking can be continued.

When the user ignites for cooking, namely the temperature sensor 21 collects temperature change information within a set time t1, the temperature sensor transmits the collected pot bottom temperature value to the controller 6; when only one temperature sensor 21 is arranged in the pot support 1, the controller 6 compares the pot bottom temperature transmitted by the temperature sensor 21 with the set temperature, if the temperature is higher than the set temperature value, the state of overhigh temperature is judged, and the controller 6 controls the electromagnetic valve 7 to be switched off to cut off the gas supply; when more than two temperature sensors 21 are arranged in the pot support 1, the controller 6 compares the average value of the pot bottom temperatures transmitted by all the temperature sensors 21 with the set temperature, if the average temperature is higher than the set temperature, the temperature is judged to be in an overhigh state, the controller 6 controls the electromagnetic valve 7 to be closed, the air supply is cut off, and meanwhile, the gravity sensor 22 is reset.

It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. The utility model provides an prevent dry combustion method device, a serial communication port, including pot support (1), pot support (1) has the cavity, place pan (8) on it, be provided with inductive element (2) in the cavity of pot support (1), inductive element (2) electricity is connected with controller (6), controller (6) are connected with solenoid valve (7) electricity, when pan (8) are placed on pot support (1), pan (8) bottom surface and inductive element (2) contact, inductive element (2) sensing pan (8) and the relevant parameter of naked light, controller (6) confirm opening or closing of solenoid valve (7) according to the parameter that detects.

2. The device for preventing dry burning according to claim 1, wherein the sensing element (2) comprises a temperature sensor (21) and a gravity sensor (22), the temperature sensor (21) is used for detecting the temperature of the bottom surface of the pot (8), and the gravity sensor (22) is used for detecting whether the pot (8) is placed on the pot holder (1).

3. The device for preventing dry burning according to claim 2, wherein the sensing element (2) comprises a sensing end provided with a position-limiting flange (23), the position-limiting flange (23) abuts against the inner surface of the pot support (1), and the lower surface of the sensing end is provided with a resilient element, thereby positioning the sensing element (2) in the cavity of the pot support (1).

4. The device of claim 3, wherein the upper surface of the pot holder (1) is formed with a through hole, the sensing end is protruded from the through hole, when the pot (8) is placed on the pot holder (1), the pot (8) presses the sensing element (2) into the cavity of the pot holder (1).

5. The device of claim 3, wherein the resilient member is a spring (25), one end of the spring (25) is fixedly connected to the bottom surface of the sensing end, and a positioning post (26) is sleeved inside the spring (25).

6. The device of claim 1, characterized in that the side wall of the inductive element (2) is provided with a transmission line (24), and the transmission line (24) is electrically connected with the controller (6).

7. The dry burning prevention device according to claim 1, wherein a burner (3) is provided at the middle of the pot support (1), a burner (4) is provided in the burner (3), a plurality of vent holes (5) are provided on the side wall of the pot support (1), and the plurality of vent holes (5) are used for heat dissipation.

8. A gas range, comprising a bottom case, a panel fixedly connected to the bottom case, and the panel being provided with the dry-burning prevention device as claimed in any one of claims 1 to 7.

9. A gas range control method applied to the gas range set forth in claim 8, the method comprising:

acquiring a parameter value detected by the sensing element (2);

the parameter value detected by the sensing element (2) is greater than a set threshold value in the controller (6), and the electromagnetic valve (7) is closed; and (3) the parameter value detected by the sensing element (2) is smaller than a set threshold value in the controller (6), and the electromagnetic valve (7) is opened.

10. Gas stove control method according to claim 9, characterized in that the parameter values detected by the sensing element (2) specifically comprise:

acquiring a gravity signal detected by a gravity sensor (22);

opening the electromagnetic valve (7) according to the gravity signal acquired by the controller (6) to continuously acquire the temperature value detected by the temperature sensor (21);

if the detected temperature value is less than the set threshold value, the temperature sensor (21) continues to detect the temperature value of the bottom of the pan;

and if the detected temperature value is greater than the set threshold value, closing the electromagnetic valve (7).