Kitchen range dry-burning detection method and kitchen range anti-dry-burning control device

Abstract

The invention discloses a stove dry burning detection method and a stove anti-dry burning control device, and the detection method comprises the following steps: A, detecting the temperature of a pot bottom through an infrared temperature detection part, and feeding back the detected temperature of the pot bottom to a controller through the infrared temperature detection part; b, the controller monitors the detected pot bottom temperature change and the valve opening size change of the gas valve body; c, when the detected temperature of the pot bottom exceeds T DEG C, the change of the temperature of the pot bottom exceeds T DEG C within a certain time t, and the valve opening degree of the valve body of the gas valve is not changed within a period of time before and after the temperature change, the controller judges that the stove is in dry burning; in the step C, when the controller judges that the stove is in dry burning, the controller disconnects the gas valve; in the step B, the gas valve feeds back the valve opening size of the valve body of the gas valve to the controller, and the controller controls the valve opening size of the valve body of the gas valve according to the detected pot bottom temperature. The problem that the dry burning temperatures of cookware made of different materials are inconsistent can be solved, namely the problem that a contact type temperature probe has requirements for the materials of the cookware is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of gas stoves, and in particular to a stove dry-burning detection method and a stove dry-burning prevention control device. Background Art

[0002] Most of the existing anti-dry-burning stoves use a thermistor supported by a free telescopic rod and close to the bottom of the pot. The temperature of the pot bottom is measured by a thermistor temperature probe. This method sets a limit value for the on and off of the temperature probe. When the temperature reaches the set temperature, the temperature probe is disconnected, thereby disconnecting the gas valve to achieve the purpose of anti-dry-burning. Since pots of different materials have different temperatures when heated, that is, the dry-burning temperatures of pots of different materials are different, the above-mentioned contact temperature probe is set with a fixed on and off temperature, which has certain limitations on the dry-burning temperature range of the pot.

[0003] Therefore, further improvements are necessary. Summary of the invention

[0004] The purpose of the present invention is to provide a stove dry-burning detection method and a stove dry-burning prevention control device with simple structure, accurate temperature measurement, good anti-dry-burning effect, strong applicability and practicality, so as to overcome the shortcomings of the prior art.

[0005] A method for detecting dry burning of a stove designed for this purpose is characterized by comprising the following steps: A. The temperature of the bottom of the pot is detected by an infrared temperature detection component, and the infrared temperature detection component feeds back the detected temperature of the bottom of the pot to the controller; B. The controller monitors and detects changes in the pot bottom temperature and changes in the opening size of the gas valve body; C. When the detected pot bottom temperature exceeds T℃, and the pot bottom temperature changes by more than △T℃ within a certain period of time △t, and the valve opening size of the gas valve body does not change within a period of time before and after the temperature change, the controller determines that the stove is dry-burning.

[0006] In step C, when the controller determines that the cooker is dry-burning, the controller disconnects the gas valve.

[0007] In step B, the gas valve feeds back the valve opening size of its valve body to the controller, and the controller controls the valve opening size of the gas valve body according to the detected pot bottom temperature.

[0008] In step A, the infrared temperature detection component continuously detects the temperature of the bottom of the pot.

[0009] In step C, the period of time is 5 to 15 seconds.

[0010] A stove dry-burning prevention control device designed for this purpose is used to execute the stove dry-burning detection method, including a stove head, characterized in that it also includes an infrared temperature detection component for detecting the temperature of the bottom of the pot, and a controller and a gas valve arranged on the stove, the infrared temperature detection component is arranged on the stove head, and the controller is electrically connected to the infrared temperature detection component and the gas valve respectively.

[0011] The infrared temperature detection component is arranged on the center hole of the furnace head.

[0012] It also includes a bottom shell and a bracket installed in the bottom shell. The bracket is located below the stove head, and the infrared temperature detection component is detachably installed on the bracket.

[0013] The infrared temperature detection component includes a detection part and an assembly part. The detection part is located on the center hole of the furnace head. The assembly part is provided with an external thread. The bracket includes an installation matching part. The assembly part is fixed on the installation matching part by the external thread and the fixing nut.

[0014] The controller is provided with an anti-dry-burn switch button for turning on or off the anti-dry-burn function.

[0015] The dry-burning detection method of the stove of the present invention detects the temperature of the bottom of the pot through an infrared temperature detection component. When the temperature of the bottom of the pot exceeds the normal temperature T of the bottom of the pot, and within the time period △t, the temperature of the bottom of the pot rises rapidly and the temperature change is greater than △T, it is judged as dry-burning. The use of this temperature change detection method can solve the problem of inconsistent dry-burning temperatures of pots of different materials, that is, solve the problem that the contact temperature probe has requirements on the material of the pot. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of a stove in one embodiment of the present invention.

[0017] Figure 2 The schematic diagram of a stove anti-dry-burning control device in one embodiment of the present invention.

[0018] Figure 3 Schematic diagram of the dry-boiling temperature of a cooker in one embodiment of the present invention. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] See also Figure 1-Figure 3 The present stove dry burning detection method comprises the following steps: A. The temperature of the bottom of the pot is detected by the infrared temperature detection component 1, and the infrared temperature detection component 1 feeds back the detected bottom temperature of the pot to the controller 2; B. The controller 2 monitors and detects the changes in the temperature of the pot bottom and the changes in the valve opening size of the gas valve 3; C. When the detected pot bottom temperature exceeds T℃ (normal temperature T), and the pot bottom temperature changes by more than △T℃ within a certain period of time △t, and the valve opening size of the gas valve 3 does not change within a period of time before and after the temperature change, the controller 2 determines that the cooker is dry-burning.

[0021] In step C, when the controller 2 determines that the cooker is dry-burning, the controller 2 disconnects the gas valve 3 to achieve the purpose of preventing dry-burning.

[0022] In step B, the gas valve 3 feeds back the valve opening size of its valve body to the controller 2, and the controller 2 controls the valve opening size of the gas valve 3 according to the detected pot bottom temperature.

[0023] In step A, the infrared temperature detection component 1 continuously detects the temperature of the pot bottom, and then the controller 2 monitors the changes in the detected temperature of the pot bottom.

[0024] In step C, the period of time is 5 to 15 seconds, preferably 10 seconds.

[0025] The controller 2 is connected with the infrared temperature detection component 1 and the gas valve 3, so as to monitor the temperature change detected by the infrared temperature detection component 1, monitor the valve opening size change of the gas valve 3, and control the on and off of the gas valve 3. Figure 3 As shown, when the stove is heated from room temperature to normal cooking temperature during the ignition stage (t0-t1) of cooking, the temperature of the bottom of the pot will fluctuate within a certain range during the normal cooking stage (t1-t2). When dry burning occurs, the temperature of the bottom of the pot will rise rapidly within a period of time, and the temperature of the bottom of the pot is relatively high, that is, the temperature is relatively high and rises rapidly during the dry burning stage (t2-t3). A program is set in the controller 2. When it is detected that the temperature of the bottom of the pot exceeds T℃, and within a certain time △t, the temperature of the bottom of the pot changes by more than △T℃, and the valve opening size of the gas valve 3 does not change within 10S before and after the temperature change, it is judged that the stove is dry burning.

[0026] The present stove dry-burning prevention control device is used to execute the stove dry-burning detection method, comprising a stove head 4, an infrared temperature detection component 1 for detecting the temperature of a pot bottom, and a controller 2 and a gas valve 3 arranged on the stove, wherein the infrared temperature detection component 1 is arranged on the stove head 4, and the controller 2 is electrically connected to the infrared temperature detection component 1 and the gas valve 3 respectively.

[0027] The infrared temperature detection component 1 is arranged on the central hole 5 of the burner 4. In the traditional method of using a contact temperature probe to detect the temperature of the bottom of the pot, after the pot has been used for a period of time, the bottom of the pot will produce debris and grease, which will affect the contact between the bottom of the pot and the probe, thereby affecting the accuracy of temperature measurement. This solution uses an infrared temperature detection component 1 to detect the temperature of the bottom of the pot, and realizes accurate temperature measurement through infrared temperature measurement technology, thereby solving the problem of inaccurate temperature measurement caused by poor contact of the contact probe due to grease and debris on the bottom of the pot.

[0028] It also includes a bottom shell 6 and a bracket 7 installed in the bottom shell 6 . The bracket 7 is located below the furnace head 4 . The infrared temperature detection component 1 is detachably installed on the bracket 7 .

[0029] The infrared temperature detection component 1 includes a detection part 8 and an assembly part 9 which are arranged upper and lower. The detection part 8 is located on the center hole 5 of the furnace head 4. The assembly part 9 is provided with an external thread. The bracket 7 includes an installation matching part 10. The assembly part 9 is fixed on the installation matching part 10 by the cooperation of the external thread and the fixing nut 11, so that the infrared temperature detection component 1 is fixed on the installation matching part 10; the installation part 9 is a mounting column arranged at the lower part of the infrared temperature detection component 1.

[0030] The mounting fitting portion 10 is provided with a through hole 12 , and the infrared temperature detection component 2 is passed through the through hole 11 , so that the infrared temperature detection component 1 is positioned on the bracket 7 in front, back, left and right directions.

[0031] A limiting portion 13 is provided at the bottom of the detection portion 8, the limiting portion 13 presses downward against the mounting fitting portion 10, the fixing nut 11 presses upward against the mounting fitting portion 10, and the mounting fitting portion 10 is located between the limiting portion 13 and the fixing nut 11, thereby positioning the infrared temperature detection component 1 up and down on the bracket 7.

[0032] The bracket 7 also includes a bracket body 14 and a fixing portion 15. The fixing portion 15 is bent and arranged at the bottom of one side of the bracket body 14, and the installation matching portion 10 is bent and arranged at the top of the other side of the bracket body 14. This structure can improve the structural strength of the bracket 7. The fixing portion 15 is fixed to the bottom shell 6 by screws or clips, or the fixing portion 15 is welded to the bottom shell 6.

[0033] The infrared temperature detection component 1 is an infrared temperature probe, and the controller 2 is a microcomputer controller.

[0034] The controller 2 is provided with an anti-dry-burn switch button for turning on or off the anti-dry-burn function, and the user can turn on or off the anti-dry-burn function as needed.

[0035] It also includes a panel 16, which is covered and installed on the top of the bottom shell 6. The burner head 4 is installed on the panel 16. A pot bracket 17 for installing pots is provided on the panel 16. An inner fire cover 18 is provided on the top of the burner head 4, and the detection unit 8 is located below the inner fire cover 18.

[0036] The above is a preferred embodiment of the present invention, which shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for illustrating the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A method for detecting dry burning of a stove, characterized in that: The following steps are involved: A. detecting the temperature of the pot bottom by an infrared temperature detection component (1), and the infrared temperature detection component (1) feeds back the detected temperature of the pot bottom to the controller (2); B. The controller (2) monitors and detects changes in the temperature of the pot bottom and changes in the valve opening size of the gas valve (3); C. When the detected pot bottom temperature exceeds T°C, and the pot bottom temperature changes by more than △T°C within a certain period of time △t, and the valve opening size of the gas valve (3) does not change within a period of time before and after the temperature change, the controller (2) determines that the stove is dry-burning.

2. The method for detecting dry burning of a cooker according to claim 1, characterized in that: In step C, when the controller (2) determines that the cooker is dry-burning, the controller (2) disconnects the gas valve (3).

3. The method for detecting dry burning of a stove according to claim 1, characterized in that: In step B, the gas valve (3) feeds back the valve opening size of its valve body to the controller (2), and the controller (2) controls the valve opening size of the gas valve (3) according to the detected pot bottom temperature.

4. The method for detecting dry burning of a stove according to claim 1, characterized in that: In step A, the infrared temperature detection component (1) continuously detects the temperature of the bottom of the pot.

5. The method for detecting dry burning of a cooker according to claim 1, characterized in that: In step C, the period of time is 5 to 15 seconds.

6. A stove dry-burning prevention control device, used to execute the stove dry-burning detection method according to any one of claims 1 to 5, comprising a burner head (4), characterized in that: It also comprises an infrared temperature detection component (1) for detecting the temperature of the bottom of the pot, and a controller (2) and a gas valve (3) arranged on the stove. The infrared temperature detection component (1) is arranged on the stove head (4), and the controller (2) is electrically connected to the infrared temperature detection component (1) and the gas valve (3), respectively.

7. The stove anti-dry burning control device according to claim 6, characterized in that: The infrared temperature detection component (1) is arranged on the central hole (5) of the furnace head (4).

8. The stove anti-dry burning control device according to claim 6, characterized in that: It also comprises a bottom shell (6) and a bracket (7) installed in the bottom shell (6); the bracket (7) is located below the furnace head (4); and the infrared temperature detection component (1) is detachably installed on the bracket (7).

9. The stove anti-dry burning control device according to claim 8, characterized in that: The infrared temperature detection component (1) comprises a detection portion (8) and an assembly portion (9); the detection portion (8) is located on the center hole (5) of the furnace head (4); the assembly portion (9) is provided with an external thread; the bracket (7) comprises a mounting matching portion (10); the assembly portion (9) is fixed to the mounting matching portion (10) by the matching of the external thread and a fixing nut (11).

10. The stove anti-dry burning control device according to claim 6, characterized in that: The controller (2) is provided with an anti-dry-burn switch button for turning on or off the anti-dry-burn function.

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