Gas stove anti-scalding reminder method and gas stove

Abstract

The present invention relates to a gas stove anti-scalding reminder method, comprising: obtaining a relationship between a first temperature of a pot support after a burner is heated, combustion parameters, and heating time, and a relationship between a second temperature of the pot support during the cooling process after the burner stops heating, the first temperature, a set of combustion parameters, and cooling time; then, by monitoring the burner's heating time and substituting the heating time into the relationship between the pot support temperature after heating, the pot support temperature Y1 at the moment the burner stops heating is obtained; finally, substituting a preset pot support temperature threshold for an anti-scalding reminder and Y1 into a calculation relationship during the cooling process to calculate the cooling time. When the cooling time is less than the cooling time, an anti-scalding reminder is issued; when the cooling time is greater than the cooling time, the anti-scalding reminder is stopped. Also disclosed is a gas stove employing the above-mentioned anti-scalding reminder method. This method does not require additional components or materials to detect the stove temperature, is low-cost, and does not require concern about component or material loss.

Description

Technical Field

[0001] The present invention relates to the technical field of gas stoves, and in particular to a gas stove anti-scalding reminder method and a gas stove. Background Art

[0002] The burner of a gas stove generates a significant amount of heat during combustion, which is transferred to the pot holder and cooktop. However, even after the gas stove is stopped, some areas on the cooktop remain warm. The pot holder area, in particular, can operate at very high temperatures, making it difficult to clearly determine its actual temperature during cleaning, which can easily cause burns. To prevent burns, a scalding warning function has been added. Currently, scalding warnings are primarily determined by sensor detection and temperature-sensitive material display. The simplest method is to set a fixed timer, allowing cleaning to begin after the burner has been stopped for a set period of time.

[0003] For example, the Chinese invention patent with application number CN201610251176.3 (application publication number CN105737213A) discloses "A gas stove with an anti-scalding reminder function". The gas stove includes an anti-scalding reminder device electrically connected to the controller and a heat detection device installed on the burner and / or the stove panel. The heat detection device is used to detect the temperature of the burner and / or the stove panel. The controller is used to generate an anti-scalding reminder instruction when the real-time temperature detected by the heat detection device is within a preset reminder range. The anti-scalding reminder device is used to provide an anti-scalding reminder according to the anti-scalding reminder instruction; the gas stove adopts the above-mentioned sensor detection method, and detects the temperature of the burner and / or the stove panel through the heat detection device, thereby providing anti-scalding according to the temperature collected by the sensor.

[0004] For example, the Chinese utility model application number ZL201920028837.5 (authorization announcement number CN210035594U) discloses "A gas stove with an anti-scalding reminder function". An installation groove is provided at the center of the top surface of the gas stove body, and card slots are symmetrically provided at both ends of the installation groove. An anti-scalding reminder device box is installed in the installation groove, and card strips are symmetrically provided at both ends of the anti-scalding reminder device box. An LED color-changing lamp is installed on the top surface of the anti-scalding reminder device box. The gas stove uses the above-mentioned temperature-sensitive material display method. The LED color-changing lamp installed on the gas stove body can change with temperature. When the temperature reaches 40°C, an alarm red light will be emitted to remind the wiping personnel or related personnel not to touch the surface of the stove body with their hands or other parts of the body.

[0005] However, existing anti-scalding methods have the following limitations: First, although the sensor detection method is relatively simple, the sensor is expensive and easily damaged due to long-term high-temperature use; second, like the sensor detection method, the temperature-sensitive material display method also has the problems of short lifespan and severe attenuation; third, the fixed time determination method is difficult to control, and too long or too short a time will affect the final anti-scalding effect.

[0006] Therefore, it is necessary to improve the existing gas stove anti-scalding reminder method. Summary of the Invention

[0007] The first technical problem to be solved by the present invention is to provide a gas stove anti-scalding reminder method that can accurately prevent scalding and is not prone to loss, in response to the above-mentioned existing technology.

[0008] The second technical problem to be solved by the present invention is to provide a gas stove using the above-mentioned gas stove anti-scalding reminder method.

[0009] The present invention solves the first technical problem by adopting a technical solution: a method for preventing scalding of a gas stove, the gas stove comprising a burner and a pot support arranged around the burner, characterized by comprising the following steps:

[0010] Step 1: Obtain a combustion parameter set q of the burner, where the combustion parameter set q includes at least one combustion parameter, and obtain a relationship between the first temperature y1(t1) of the pot support after the burner is heated, the combustion parameter set q, and the heating time t1; specifically:

[0011] y1(t1)=f1(t1,q)

[0012] Wherein, f1(.) is the relationship function between the first temperature y1(t1) of the pot support after the burner is heated, the combustion parameter set q and the heating time t1;

[0013] Step 2: Obtain the relationship between the second temperature y2(t2) of the pot support during the cooling process after the burner stops heating, the first temperature y1(t1), the combustion parameter set q, and the cooling time t2; specifically:

[0014] y2(t2)=f2(y1(t1), t2, q)

[0015] Wherein, f2(.) is the relationship function between the second temperature y2(t2) of the pot support and the first temperature y1(t1) during the cooling process after stopping heating, the combustion parameter set q and the cooling time t2;

[0016] Step 3, continuously monitoring whether the valve body of the burner is open and whether the burner generates flames, and starting timing when the valve body of the burner is open and the burner generates flames;

[0017] Step 4: continuously monitor whether the valve body of the burner is closed or whether the burner stops generating flames, and when the valve body of the burner is closed or the burner stops generating flames, stop timing and obtain the current timing time T1;

[0018] Step 5: Use the current timing time T1 as the heating time and substitute it into the relationship in step 1 to obtain the pot support temperature Y1 when the burner stops heating;

[0019] Step 6: Preset a pot support temperature threshold value Y2 for the anti-scalding reminder, and use the pot support temperature threshold value Y2 as the second temperature value. Substitute the pot support temperature threshold value Y2 and the pot support temperature Y1 in step 5 into the relationship in step 2 to calculate the cooling time T2.

[0020] Step 7: Start timing from the moment the burner valve body is closed or the burner stops generating flames. When the time is less than the cooling time T2, the anti-scalding reminder is issued; when the time is greater than the cooling time T2, the anti-scalding reminder is stopped.

[0021] In this solution, the calculation formula of y1(t1) in step 1 is:

[0022]

[0023] Among them, Q is the heat provided by the burner to the pot support per unit time; a1 is the heat transfer coefficient during the burner combustion process; S is the area of the pot support; c is the specific heat capacity of the pot support; m is the mass of the pot support; y0 is the ambient temperature of the burner. Q, a1, S, c, m and y0 are all known parameters in the combustion parameter set q.

[0024] In this solution, the calculation formula of y2(t2) in step 2 is:

[0025]

[0026] Among them, a2 is the heat transfer coefficient after the burner stops combustion, and a2 is a known parameter in the combustion parameter set q.

[0027] The technical solution adopted by the present invention to solve the second technical problem is: a gas stove using the above-mentioned gas stove anti-scalding reminder method, comprising:

[0028] Cooktop panel;

[0029] a burner, at least partially extending above the cooktop;

[0030] The pot support is installed on the cooktop and arranged around the burner;

[0031] a thermocouple disposed adjacent to the burner;

[0032] It is characterized by: further comprising:

[0033] Voltage detection module, used to detect the voltage of the burner valve body;

[0034] Electromotive force detection module, used to detect the electromotive force of the thermocouple;

[0035] The controller is connected with the voltage detection module and the electromotive force detection module.

[0036] In order to realize the anti-scalding alarm, it also includes a timing module and an alarm module provided on the stove panel. The alarm module and the timing module are both connected to the controller. The controller is configured to control the timing module and the alarm module to perform corresponding actions according to the detection results of the voltage detection module and the electromotive force detection module.

[0037] Compared with existing technologies, the present invention has the advantage of being able to calculate the wok support temperature when the burner stops firing by detecting the burner's operating time. Combined with the equation for the wok support's cooling process after the burner stops heating, the time required for the wok support to cool to the preset wok support temperature threshold for the anti-scalding warning can be calculated. Therefore, this method requires no additional components or materials to detect the stove's temperature, is low-cost, and eliminates the risk of component or material wear and tear. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic structural diagram of a gas stove according to an embodiment of the present invention;

[0039] Figure 2 Flowchart of the gas stove anti-scalding reminder method in an embodiment of the present invention. DETAILED DESCRIPTION

[0040] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0041] like Figure 1 As shown, the gas stove in this embodiment includes a cooker panel 1, a burner 2, a pot support 3, a thermocouple 4, a voltage detection module (not shown in the figure), an electromotive force detection module (not shown in the figure) and a controller (not shown in the figure).

[0042] The burner 2 at least partially extends above the stove panel; the above-mentioned burner 2 is a well-known structure on the existing gas stove and will not be elaborated here; the pot bracket 3 is provided on the stove panel 1 and arranged around the burner 2; the thermocouple 4 is provided adjacent to the burner 2, and the thermocouple 4 is mainly used to detect whether the burner 2 is burning, that is, after the burner 2 burns and produces a flame, the electromotive force of the thermocouple 4 will change, conversely, when the burner 2 does not produce a flame, the electromotive force of the thermocouple 4 does not change; the voltage detection module is used to detect the voltage of the burner valve body, and the result of the voltage detection module is mainly used for the subsequent controller to determine whether the valve body is open or closed; the valve body can be an ignition needle provided on the burner; the electromotive force detection module is used to detect the electromotive force of the thermocouple, and the result of the electromotive force detection module is mainly used for the subsequent controller to determine whether the burner produces a flame; the controller is connected to the voltage detection module and the electromotive force detection module to obtain the opening status of the valve body and the flame status of the burner.

[0043] The cooktop 1 also includes a timing module (not shown) and an alarm module (not shown) located on the cooktop. Both the alarm module and the timing module are connected to a controller. The controller is configured to control the timing module and the alarm module to perform corresponding actions based on the detection results of the voltage detection module and the electromotive force detection module. In this embodiment, the timing module is a timer with a timing function, and the alarm module is an alarm with an audible and visual alarm function.

[0044] The anti-scalding reminder method of the gas stove in this embodiment is mainly used to provide anti-scalding reminders for the temperature of the pot support. Figure 2 As shown, the anti-scalding reminder method of the gas stove includes the following steps:

[0045] Step 1: Obtain a combustion parameter set q of the burner, where the combustion parameter set q includes at least one combustion parameter, and obtain a relationship between the first temperature y1(t1) of the pot support after the burner is heated, the combustion parameter set q, and the heating time t1; specifically:

[0046] y1(t1)=f1(t1,q)

[0047] Wherein, f1(.) is the relationship function between the first temperature y1(t1) of the pot support after the burner is heated, the combustion parameter set q and the heating time t1;

[0048] Step 2: Obtain the relationship between the second temperature y2(t2) of the pot support during the cooling process after the burner stops heating, the first temperature y1(t1), the combustion parameter set q, and the cooling time t2; specifically:

[0049] y2(t2)=f2(y1(t1), t2, q)

[0050] Wherein, f2(.) is the relationship function between the second temperature y2(t2) of the pot support and the first temperature y1(t1) during the cooling process after stopping heating, the combustion parameter set q and the cooling time t2;

[0051] Step 3: Continuously monitor whether the burner valve is open and whether the burner generates flames, and start timing when the burner valve is open and the burner generates flames. In this embodiment, multiple detections of whether the valve is open and whether the burner generates flames are performed to prevent interference caused by detection errors.

[0052] Step 4: continuously monitor whether the valve body of the burner is closed or whether the burner stops generating flames, and when the valve body of the burner is closed or the burner stops generating flames, stop timing and obtain the current timing time T1;

[0053] Step 5: Use the current timing time T1 as the heating time and substitute it into the relationship in step 1 to obtain the pot support temperature Y1 when the burner stops heating;

[0054] Step 6: Preset a pot support temperature threshold value Y2 for the anti-scalding reminder, and use the pot support temperature threshold value Y2 as the second temperature value. Substitute the pot support temperature threshold value Y2 and the pot support temperature Y1 in step 5 into the relationship in step 2 to calculate the cooling time T2.

[0055] Step 7: Start timing from the moment the burner valve body is closed or the burner stops generating flames. When the time is less than the cooling time T2, the anti-scalding reminder is issued; when the time is greater than the cooling time T2, the anti-scalding reminder is stopped.

[0056] In this embodiment, the temperature of the pot support during the burner heating process follows the relationship:

[0057] Q=a1*S*[y1(t)-y0]+c*m*y1′(t)

[0058] Where Q is the heat provided by the burner to the pot support per unit time, unit: W / s; a1 is the heat transfer coefficient during the burner combustion process, determined by the material, shape and other characteristics, unit: W / (℃*m2); S is the area of the pot support, unit: m2; y1(t) is the temperature of the pot support when the burner is heated for a time of t; y0 is the ambient temperature of the burner; c is the specific heat capacity of the pot support, unit: J / (kg*℃); m is the mass of the pot support, unit: kg; y1′(t) is the derivative of y1(t) (i.e., the rate of change of the pot support temperature per unit time); Q, a1, S, c, m and y0 are all known parameters in the combustion parameter set q.

[0059] According to the above calculation, the temperature of the pot support during the burner heating process is:

[0060]

[0061] In addition, the temperature of the pot support during the cooling process after the burner stops heating follows the relationship:

[0062] c*m*y2′(t)+a2*S*[y2(t)-y0]=0

[0063] Wherein, a2 is the heat transfer coefficient after the burner stops burning, and a2 is a known parameter in the combustion parameter set q;

[0064] The initial temperature during heat dissipation is obtained from the heating process formula:

[0065] The temperature can be reduced to the anti-scalding temperature y2:

[0066]

[0067] According to the heat dissipation process formula, the time required for the anti-scalding reminder is:

[0068]

[0069] Since c, m, a1, a2, y2, y0, S, and Q are all known items, the time required for the anti-scalding reminder can be calculated based on the burning time.

Claims

1. A gas stove anti-scalding reminder method, the gas stove includes a burner and a pot support arranged around the burner, characterized in that The steps include: Step 1: Obtain a combustion parameter set q of the burner, where the combustion parameter set q includes at least one combustion parameter, and obtain a relationship between the first temperature y1(t1) of the pot support after the burner is heated, the combustion parameter set q, and the heating time t1; specifically: y1(t1)=f1(t1,q) Wherein, f1(.) is the relationship function between the first temperature y1(t1) of the pot support after the burner is heated, the combustion parameter set q and the heating time t1; Step 2: Obtain the relationship between the second temperature y2(t2) of the pot support during the cooling process after the burner stops heating, the first temperature y1(t1), the combustion parameter set q, and the cooling time t2; specifically: y2(t2)=f2(y1(t1), t2, q) Wherein, f2(.) is the relationship function between the second temperature y2(t2) of the pot support and the first temperature y1(t1) during the cooling process after stopping heating, the combustion parameter set q and the cooling time t2; Step 3, continuously monitoring whether the valve body of the burner is open and whether the burner generates flames, and starting timing when the valve body of the burner is open and the burner generates flames; Step 4: continuously monitor whether the valve body of the burner is closed or whether the burner stops generating flames, and when the valve body of the burner is closed or the burner stops generating flames, stop timing and obtain the current timing time T1; Step 5: Use the current timing time T1 as the heating time and substitute it into the relationship in step 1 to obtain the pot support temperature Y1 when the burner stops heating; Step 6: Preset a pot support temperature threshold value Y2 for the anti-scalding reminder, and use the pot support temperature threshold value Y2 as the second temperature value. Substitute the pot support temperature threshold value Y2 and the pot support temperature Y1 in step 5 into the relationship in step 2 to calculate the cooling time T2. Step 7: Start timing from the moment the burner valve body is closed or the burner stops generating flames. When the time is less than the cooling time T2, the anti-scalding reminder is issued; when the time is greater than the cooling time T2, the anti-scalding reminder is stopped.

2. The gas stove anti-scalding reminder method according to claim 1, characterized in that: The calculation formula of y1(t1) in step 1 is: Among them, Q is the heat provided by the burner to the pot support per unit time; a1 is the heat transfer coefficient during the burner combustion process; S is the area of the pot support; c is the specific heat capacity of the pot support; m is the mass of the pot support; y0 is the ambient temperature of the burner. Q, a1, S, c, m and y0 are all known parameters in the combustion parameter set q.

3. The gas stove anti-scalding reminder method according to claim 2, characterized in that: The calculation formula of y2(t2) in step 2 is: Among them, a2 is the heat transfer coefficient after the burner stops combustion, and a2 is a known parameter in the combustion parameter set q.

4. A gas stove using the gas stove anti-scalding reminder method according to any one of claims 1 to 3, comprising: Cooktop panel; a burner, at least partially extending above the cooktop; The pot support is installed on the cooktop and arranged around the burner; a thermocouple disposed adjacent to the burner; It is characterized by: further comprising: Voltage detection module, used to detect the voltage of the burner valve body; Electromotive force detection module, used to detect the electromotive force of the thermocouple; The controller is connected with the voltage detection module and the electromotive force detection module.

5. The gas stove according to claim 4, characterized in that: It also includes a timing module and an alarm module provided on the stove panel. The alarm module and the timing module are both connected to a controller. The controller is configured to control the timing module and the alarm module to perform corresponding actions based on the detection results of the voltage detection module and the electromotive force detection module.

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