Gas stove firepower display control method and gas stove

Abstract

The invention belongs to the technical field of household appliances, and discloses a gas stove firepower display control method and a gas stove.The gas stove firepower display control method comprises the following steps that S1, a gas pressure value in a gas valve is obtained; s2, acquiring a detection value of a firepower detection module, wherein the detection value of the firepower detection module can change according to the flame temperature change of the gas stove; s3, if the gas pressure value is increased and the detection value of the firepower detection module has a first preset change trend, ignition succeeds and the step S4 is executed, otherwise, ignition fails and the step S5 is executed; s4, the firepower value of the gas stove is displayed according to the gas pressure value; and S5, sending out a first early warning signal. After ignition is successful, the firepower value of the gas stove is directly displayed according to the gas pressure value in the gas valve, and compared with the mode that the firepower value is indirectly measured by detecting the rotation angle of the gas valve in the prior art, the display result is more accurate. And if the ignition fails, the user is warned, so that the use safety is improved.

Description

Technical Field

[0001] The invention relates to the technical field of household appliances, and in particular to a gas stove firepower display control method and a gas stove. Background Art

[0002] Gas stoves are commonly used cooking appliances, and the control of firepower during cooking is an important factor affecting the quality of dishes. In order to more intuitively display the firepower status, the prior art usually uses lighting effects or screen display of firepower values ​​to represent the firepower, which is convenient for users to know.

[0003] However, no matter which representation method is used, the detection source of the firepower value is realized by detecting the rotation angle of the gas valve. That is, any rotation angle of the gas valve corresponds to a calibrated gas stove firepower value. When the gas stove is used, the corresponding gas stove firepower value can be displayed by detecting the rotation angle of the gas valve.

[0004] The above scheme has the following defects: the change in the rotation angle of the gas valve is not linearly related to the change in the overlap between the valve core opening and the valve body outlet when the gas valve rotates, and it is difficult to accurately calibrate the gas stove fire value according to the rotation angle of the gas valve. In addition, no correction is made during the fire value detection, resulting in poor accuracy of fire display. In addition, in the prior art, whether the gas stove is ignited successfully or not, and whether the gas stove is in the off state or the accidental flameout state, requires the user to observe the flame state and whether the gas is emitting gas to judge, without other prompt information, and when the gas stove is accidentally flamed out, it may cause gas leakage, which may cause fire, explosion and other dangerous accidents. The user cannot intuitively understand the operating status of the gas stove, the user experience is poor, and there are safety hazards.

[0005] Therefore, there is an urgent need for a gas stove firepower display control method and a gas stove to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide a gas stove firepower display control method and a gas stove, which can accurately display the firepower value of the gas stove and the operating status of the gas stove, thereby improving the user experience and safety.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] In a first aspect, a method for controlling the firepower display of a gas stove is provided, wherein gas is sprayed and burned through a gas valve, comprising the following steps:

[0009] S1. Obtain the gas pressure value in the gas valve;

[0010] S2, obtaining a detection value of a fire detection module, wherein the detection value of the fire detection module can change according to a change in the flame temperature of the gas stove;

[0011] S3, if the gas pressure value increases and the detection value of the fire detection module has a first preset change trend, the ignition is successful and S4 is executed, otherwise the ignition fails and S5 is executed;

[0012] S4, displaying the fire power value of the gas stove according to the gas pressure value;

[0013] S5. Issue the first warning signal.

[0014] During the ignition stage, gas will pass through the gas valve, and the internal gas pressure will rise instantly. If the ignition is successful, the burner of the gas stove will produce flames, and the temperature will rise, which will cause the detection value of the fire detection module to change, and the change trend is the first preset change trend; if the ignition fails, the burner cannot form a flame, and the temperature is almost unchanged. Correspondingly, the detection value of the fire detection module will not change, and it does not meet the first preset change trend. Therefore, during the user's ignition stage, the gas pressure value in the gas valve is first obtained, and then the detection value of the fire detection module is obtained. When the gas pressure value rises and the change trend of the detection value of the fire detection module is consistent with the first preset change trend, it is determined that the ignition is successful. After the ignition is successful, the fire value of the gas stove is directly displayed according to the gas pressure value in the gas valve. The fire value is related to the gas flow in the gas valve. The gas pressure value can accurately represent the fire value. Compared with the indirect measurement of the fire value by detecting the rotation angle of the gas valve in the prior art, the fire value changes with the change of the gas pressure value, and the display result is more accurate. If the ignition fails, although the gas pressure value increases, there will be some gas leakage due to the lack of flame. At this time, the detection value of the fire detection module will not show the first preset change trend. The gas stove will prompt the user with a first warning signal that the ignition has failed, so that the user can re-ignite and open the valve until the ignition is successful. The gas stove fire display control method can accurately display the fire value of the gas stove, improve the cooking quality of food, and can display the operating status of whether the gas stove is ignited successfully or not, thereby improving the user experience and safety.

[0015] As a preferred embodiment of the gas stove firepower display control method provided by the present invention, the gas stove firepower display control method further comprises the following steps:

[0016] S6, gas valve accepts screwing operation;

[0017] S7, determining whether the gas pressure value increases within a unit time, if yes, executing S8, if no, executing S9;

[0018] S8. If the detection value of the firepower detection module has a second preset change trend, the firepower value is reduced and displayed, otherwise it is in a fire-off state and displayed;

[0019] S9. If the detection value of the firepower detection module has a second preset change trend, the firepower value increases and is displayed; otherwise, it is an unexpected flameout state and a second warning signal is issued.

[0020] As a preferred solution of the gas stove firepower display control method provided by the present invention, the firepower detection module includes a thermocouple, and the thermoelectric potential of the thermocouple increases with the increase of temperature;

[0021] The first preset change trend is: the thermoelectric potential of the thermocouple is greater than zero and presents an upward trend;

[0022] The second preset change trend is: the absolute value of the change in the thermoelectric potential of the thermocouple per unit time is greater than a preset constant.

[0023] In a second aspect, a gas stove is provided, which is controlled by the gas stove firepower display control method as described above, and the gas stove comprises:

[0024] a gas valve through which the gas is ejected and burned;

[0025] A pressure detection module, the detection end of which extends into the gas valve to obtain the gas pressure value;

[0026] A fire detection module is arranged inside the burner of the gas stove;

[0027] A firepower display module, used to display the firepower value of the gas stove and the operating status of the gas stove;

[0028] The control module is communicatively connected with the pressure detection module, the firepower detection module and the firepower display module.

[0029] As a preferred solution of the gas stove provided by the present invention, the gas valve comprises:

[0030] A valve body, wherein a valve body air inlet, a gas channel, a mounting groove and a valve body air outlet are sequentially arranged on the valve body along the air flow direction, and the valve body air inlet is connected to the gas channel in a blockable manner;

[0031] A valve core, the valve core is rotatably arranged in the mounting groove, the valve core is provided with a core cavity and a valve core inlet and a valve core outlet communicated with the core cavity, the core cavity is communicated with the gas channel through the valve core inlet, the core cavity is communicated with the valve body air outlet through the valve core outlet, when the valve core is rotated, the overlap degree of the valve core outlet and the valve body air outlet changes;

[0032] The detection end of the pressure detection module extends into the gas channel.

[0033] As a preferred solution of the gas stove provided by the present invention, a first sealing structure is provided between the pressure detection module and the tube wall of the gas channel.

[0034] As a preferred solution of the gas stove provided by the present invention, a control channel is further provided on the valve body, and a solenoid valve is provided in the control channel, and a valve stem of the solenoid valve can move along the control channel to open or block the air inlet of the valve body and the gas channel;

[0035] A second sealing structure is arranged between the valve stem and the gas channel.

[0036] As a preferred solution of the gas stove provided by the present invention, the cross-sectional area of ​​the gas channel is larger than the cross-sectional area of ​​the valve core outlet, and the cross-sectional area of ​​the gas channel is smaller than the cross-sectional area of ​​the control channel and the cross-sectional area of ​​the valve body air inlet.

[0037] As a preferred solution of the gas stove provided by the present invention, the pressure detection module includes a pressure sensor.

[0038] As a preferred solution of the gas stove provided by the present invention, the fire power display module includes a display screen and / or a display light assembly.

[0039] Beneficial effects of the present invention:

[0040] The gas stove firepower display control method and the gas stove provided by the present invention, in the ignition stage, gas will pass through the gas valve, and the internal gas pressure will rise instantly. If the ignition is successful, the burner of the gas stove will generate flames, the temperature will rise, and the detection value of the firepower detection module will change, and the change trend is the first preset change trend; if the ignition fails, the burner cannot form a flame, the temperature is almost unchanged, and accordingly, the detection value of the firepower detection module will not change, which does not meet the first preset change trend. Therefore, in the user's ignition stage, the gas pressure value in the gas valve is first obtained, and then the detection value of the firepower detection module is obtained. When the gas pressure value rises and the change trend of the detection value of the firepower detection module is consistent with the first preset change trend, it is determined that the ignition is successful. After the ignition is successful, the firepower value of the gas stove is directly displayed according to the gas pressure value in the gas valve. The firepower value is related to the gas flow in the gas valve. The firepower value can be accurately characterized by the gas pressure value. Compared with the indirect measurement of the firepower value by detecting the rotation angle of the gas valve in the prior art, the firepower value changes with the change of the gas pressure value, and the display result is more accurate. If the ignition fails, although the gas pressure value increases, there will be some gas leakage due to the lack of flame. At this time, the detection value of the fire detection module will not show the first preset change trend. The gas stove will prompt the user with a first warning signal that the ignition has failed, so that the user can re-ignite and open the valve until the ignition is successful. The gas stove fire display control method can accurately display the fire value of the gas stove, improve the cooking quality of food, and can display the operating status of whether the gas stove is ignited successfully or not, thereby improving the user experience and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 is a first flow chart of a gas stove firepower display control method provided by a specific embodiment of the present invention;

[0042] Figure 2 is a second flow chart of the gas stove firepower display control method provided by the specific embodiment of the present invention;

[0043] Figure 3 It is a schematic diagram of a structure for controlling firepower display in a gas stove provided in a specific embodiment of the present invention;

[0044] Figure 4 is a first cross-sectional view of a gas valve provided in a specific embodiment of the present invention;

[0045] Figure 5 It is a second cross-sectional view of the gas valve provided in the specific embodiment of the present invention.

[0046] In the figure:

[0047] 1. Gas valve; 2. Pressure detection module; 3. Thermocouple; 4. Fire display module; 5. Control module;

[0048] 11. Valve body; 12. Valve core; 13. Solenoid valve; 14. Mounting pipe; 15. Nozzle;

[0049] 111, air inlet of valve body; 112, gas passage; 113, mounting groove; 114, air outlet of valve body; 115, control passage; 116, air inlet pipe;

[0050] 121, core cavity; 122, valve core inlet; 123, valve core outlet;

[0051] 131. Valve stem. DETAILED DESCRIPTION

[0052] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0053] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0055] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0056] like Figure 1 As shown, this embodiment provides a method for controlling the firepower display of a gas stove. The gas passes through a gas valve 1 (see Figure 3 ) is sprayed out and burns. The gas stove firepower display control method comprises the following steps:

[0057] S1, obtaining the gas pressure value in the gas valve 1;

[0058] S2, obtaining a detection value of a fire detection module, where the detection value of the fire detection module can change according to a change in the flame temperature of the gas stove;

[0059] S3, if the gas pressure value increases and the detection value of the fire detection module has a first preset change trend, the ignition is successful and S4 is executed, otherwise the ignition fails and S5 is executed;

[0060] The first preset change trend is the change trend of the detection value of the fire detection module from no fire to flame generation.

[0061] S4, displaying the fire value of the gas stove according to the gas pressure value;

[0062] S5. Issue the first warning signal.

[0063] During the ignition stage, gas will flow through the gas valve 1, and the internal gas pressure will rise instantly. If the ignition is successful, the burner of the gas stove will produce flames, and the temperature will rise, which will cause the detection value of the fire detection module to change, and the change trend is the first preset change trend; if the ignition fails, the burner cannot form a flame, and the temperature is almost unchanged. Correspondingly, the detection value of the fire detection module will not change, and it does not meet the first preset change trend. Therefore, during the user's ignition stage, the gas pressure value in the gas valve 1 is first obtained, and then the detection value of the fire detection module is obtained. When the gas pressure value rises and the change trend of the detection value of the fire detection module is consistent with the first preset change trend, it is determined that the ignition is successful. After the ignition is successful, the fire value of the gas stove is directly displayed according to the gas pressure value in the gas valve 1. The fire value is related to the gas flow in the gas valve 1. The fire value can be accurately characterized by the gas pressure value. Compared with the indirect measurement of the fire value by detecting the rotation angle of the gas valve 1 in the prior art, the fire value changes with the change of the gas pressure value, and the display result is more accurate. If the ignition fails, although the gas pressure value increases, there will be some gas leakage due to the lack of flame. At this time, the detection value of the fire detection module will not show the first preset change trend. The gas stove will prompt the user with a first warning signal that the ignition has failed, so that the user can re-ignite and open the valve until the ignition is successful. The gas stove fire display control method can accurately display the fire value of the gas stove, improve the cooking quality of food, and can display the operating status of whether the gas stove is ignited successfully or not, thereby improving the user experience and safety.

[0064] It is understandable that the fire detection module can receive the temperature change generated by the burner, thereby changing its detection value. For example, when a flame is generated, the detection value of the fire detection module becomes significantly larger or significantly smaller.

[0065] In step S3, if the ignition is successful, it can be displayed, for example, "Ignition has been started", "Ignition is successful" or by lighting a warning light.

[0066] Based on Bernoulli equation p+1 / 2ρv 2 +ρgh=C, where p is the pressure at a certain point in the fluid, v is the flow velocity at that point, ρ is the fluid density, g is the acceleration due to gravity, h is the height of the point, and C is a constant, which indicates that kinetic energy + gravitational potential energy + pressure potential energy = constant, that is, the mechanical energy of the fluid is conserved. When the fluid flows at equal heights, the greater the flow velocity, the smaller the pressure. The total mechanical energy of the gas introduced into the gas valve 1 is a constant, and the pressure p can be obtained according to the gas pressure value. The velocity v of the fluid is related to the flow value at the outlet of the gas valve 1, so a corresponding relationship is established with the firepower value, and the firepower value is characterized according to the velocity v.

[0067] After the ignition is successful, the gas stove firepower display control method further includes the following steps:

[0068] S6, the gas valve 1 is turned and screwed. Specifically, the user adjusts the fire power by turning the gas valve 1.

[0069] S7, judging whether the gas pressure value increases within a unit time, if so, executing S8, if not, executing S9.

[0070] S8. If the detection value of the fire detection module has a second preset change trend, the fire value is reduced and displayed, otherwise it is in the off state and displayed;

[0071] S9. If the detection value of the firepower detection module has a second preset change trend, the firepower value increases and is displayed; otherwise, it is an unexpected flameout state and a second warning signal is issued.

[0072] The second preset change trend is the change trend of the detection value of the fire detection module from the stage of fire to no fire.

[0073] After the gas valve 1 is turned, when the gas pressure value per unit time increases, the gas flow rate decreases, and there are two situations: fire power value reduction and fire off, which need to be further judged by the detection value of the fire power detection module. If the fire is turned off, the flame at the burner disappears, the temperature drops instantly, and the detection value of the fire power detection module changes accordingly, and the change trend is the second preset change trend. Therefore, if it is determined that the change of the detection value of the fire power detection module is consistent with the second preset change trend, it is in the fire off state, otherwise it is in the fire power reduction state, and the size of the fire power value can be displayed at this time.

[0074] After turning the gas valve 1, when the gas pressure value per unit time decreases, the gas flow rate increases, which is a state of increased firepower. When the gas pressure value per unit time does not change substantially, it is an unexpected flameout state. For the increased firepower and unexpected flameout, it is necessary to further judge by the detection value of the firepower detection module. If it is determined that the change in the detection value of the firepower detection module is consistent with the second preset change trend, it means that the flame is extinguished at this time, but since the gas pressure remains unchanged, it indicates that the gas is still being output, so it is determined to be an unexpected flameout state, otherwise it is a state of increased firepower, and the size of the firepower value can be displayed at this time.

[0075] In step S9, the second warning signal can promptly remind the user that an unexpected flameout has occurred, thereby avoiding a greater safety accident. Both the first warning signal and the second warning signal can be in the form of text prompts, voice prompts, light prompts, sound prompts, and the like.

[0076] In this embodiment, the fire detection module includes a thermocouple 3. The thermocouple 3 is preferably arranged inside the burner to receive temperature changes at the burner. The thermoelectric potential of the thermocouple 3 increases as the temperature rises.

[0077] Specifically, the first preset change trend is: the thermoelectric potential Ut of the thermocouple 3 is greater than zero and is on an upward trend. The second preset change trend is: the absolute value of the change in the thermoelectric potential Ut of the thermocouple 3 per unit time is greater than the preset constant ΔU (usually a few tenths of a millivolt). Figure 2 As shown, if |U(t+1)-Ut|≤ΔU, it means that the change of the thermoelectric potential Ut is not large, and the flame still exists, corresponding to the two states of increasing or decreasing firepower.

[0078] See also Figure 2 If the gas pressure Pt in the gas valve 1 is 0 when not ignited, then when Pt>0, and Ut>0, U(t+1)-Ut>0, it is determined that the ignition is successful.

[0079] This embodiment also provides a gas stove, which is controlled by the gas stove firepower display control method as described above. Figure 3 As shown, the gas stove includes a gas valve 1 , a pressure detection module 2 , a fire detection module, a fire display module 4 and a control module 5 .

[0080] The gas is ejected through the gas valve 1 and burns at the burner position. The detection end of the pressure detection module 2 extends into the gas valve 1 to obtain the gas pressure value in the gas valve 1. The fire detection module is arranged inside the burner of the gas stove to ensure that it senses the temperature change of the flame. The fire display module 4 is used to display the fire value of the gas stove and the operating status of the gas stove (such as turning off the fire, accidental flameout, ignition failure, etc.). The control module 5 is connected to the pressure detection module 2, the fire detection module and the fire display module 4.

[0081] The control module 5 can obtain the gas pressure value information detected by the pressure detection module 2 and the detection value of the fire detection module. Taking the fire detection module including the thermocouple 3 as an example, the control module 5 can obtain the thermoelectric potential value of the thermocouple 3. In the ignition stage, when the gas pressure value Pt increases and the thermoelectric potential Ut is greater than zero and shows an upward trend, the ignition is successful, and the control module 5 controls the fire display module 4 to display the current fire value.

[0082] See also Figure 3 , Figure 4 as well as Figure 5 The gas valve 1 includes a valve body 11 and a valve core 12. The valve body 11 is provided with a valve body air inlet 111, a gas channel 112, a mounting groove 113 and a valve body air outlet 114 in sequence along the air flow direction. The valve body 11 is provided with an air inlet pipe 116 for accessing the gas at the valve body air inlet 111. The valve body air inlet 111 is connected to the gas channel 112 in a blockable manner to realize the supply and cutoff of the gas. The detection end of the pressure detection module 2 extends into the gas channel 112 to detect the gas pressure value inside it. The valve core 12 is rotatably arranged in the installation groove 113. The valve core 12 is provided with a core cavity 121 and a valve core inlet 122 and a valve core outlet 123 which are connected with the core cavity 121. The core cavity 121 is connected with the gas channel 112 through the valve core inlet 122, and the core cavity 121 is connected with the valve body air outlet 114 through the valve core outlet 123. When the valve core 12 is rotated, the overlap between the valve core outlet 123 and the valve body air outlet 114 changes, thereby changing the gas flow value at the valve body air outlet 114. At this time, the gas pressure value in the gas channel 112 changes.

[0083] See also Figure 3 and Figure 5 The valve body 11 is provided with a mounting pipe 14 at the valve body air outlet 114 , and one end of the mounting pipe 14 away from the valve body air outlet 114 is used to connect with a nozzle 15 , and the nozzle 15 is used to spray out the gas, so that the gas output is more uniform.

[0084] Optionally, the pressure detection module 2 is connected to the wall of the gas channel 112. Further, a first sealing structure is provided between the pressure detection module 2 and the wall of the gas channel 112 to prevent air leakage at the connection. The first sealing structure may be a sealing rubber ring.

[0085] See also Figure 3 and Figure 4 The valve body 11 is also provided with a control channel 115, in which a solenoid valve 13 is provided. When the solenoid valve 13 is powered on or off, the valve stem 131 of the solenoid valve 13 can move along the control channel 115 to connect or block the valve body air inlet 111 and the gas channel 112. Specifically, the control channel 115 is coaxially arranged with the gas channel 112, and the diameter of the control channel 115 is larger than the diameter of the gas channel 112. The air inlet pipe 116 is vertically connected to the pipe wall of the control channel 115. When the valve body air inlet 111 and the gas channel 112 are blocked, the valve stem 131 moves to block the air inlet of the gas channel 112. When the valve body air inlet 111 and the gas channel 112 are connected, the valve stem 131 moves away from the air inlet of the gas channel 112.

[0086] Furthermore, a second sealing structure is arranged between the valve stem 131 and the gas channel 112 to ensure the reliability of the valve stem 131 in sealing the air inlet of the gas channel 112. Exemplarily, the second sealing structure can be a sealing rubber ring arranged on the valve stem 131 or on the stepped surface at the connection between the gas channel 112 and the control channel 115.

[0087] Preferably, the cross-sectional area of ​​the gas channel 112 is larger than the cross-sectional area of ​​the valve core outlet 123, and the cross-sectional area of ​​the gas channel 112 is smaller than the cross-sectional area of ​​the control channel 115 and the cross-sectional area of ​​the valve body air inlet 111, which can improve the sensitivity of pressure changes in the gas channel 112 while meeting the firepower requirements of the gas stove.

[0088] Optionally, the pressure detection module 2 includes a pressure sensor, which has high detection accuracy and is easy to communicate with the control module 5 .

[0089] Optionally, the firepower display module 4 includes a display screen, which can display the firepower value, such as displaying the firepower value in the form of L1, L2, L3..., or directly displaying numbers. The display screen can also display operating status prompts such as "ignition", "ignition failure", and "accidental flameout".

[0090] Alternatively, the firepower display module 4 includes a display light assembly, which can light up lights of different colors to indicate the current operating state of the gas stove, for example, a yellow light indicates "ignition failure" and a red light indicates "accidental flameout". Further, the display light assembly can indicate the size of the firepower value by the number of lighted lamp beads, which can be selected according to design requirements. The display screen and the display light assembly can also be used in combination, and the two can be set independently or integrated in one module.

[0091] In summary, combined with Figures 2 to 5The process of realizing firepower display control of the gas stove provided in this embodiment is roughly as follows:

[0092] The solenoid valve 13 on the gas valve 1 of the gas stove is opened, the valve stem 131 no longer blocks the air inlet of the gas channel 112, the valve body air inlet 111 is connected with the gas channel 112, the gas enters the gas channel 112, and the gas pressure value Pt increases. When the valve core 12 is turned to increase the overlap between the valve core outlet 123 and the valve body outlet 114, the gas flow rate at the gas channel 112 increases, and the gas pressure value Pt decreases. The smaller the Pt value detected at the gas channel 112, the faster the gas flow rate, and the greater the firepower of the gas stove at this time, and vice versa.

[0093] When the gas stove opens the valve to ignite, the gas pressure value Pt detected by the pressure sensor changes instantly, and at the same time, the thermoelectric potential Ut of the thermocouple 3 rises, then the control module 5 determines that the ignition is successful and displays it, and at the same time displays the firepower value according to the gas pressure value Pt detected by the pressure sensor, or directly displays the current firepower value if the ignition is successful. If it is detected that the thermoelectric potential Ut of the thermocouple 3 has no rising trend, it is determined that the ignition has failed and relevant information is displayed, and the user is prompted with a first warning signal.

[0094] For a normally operating gas stove, when the pressure sensor detects that Pt is basically unchanged and the thermoelectric potential Ut of the thermocouple 3 decreases, it is determined that the gas stove is accidentally turned off and information is displayed, and the user is prompted with a second warning signal. When the gas stove is adjusting the size of the fire, the gas pressure value Pt is detected to change. When Pt rises, if the absolute value of the change in the thermoelectric potential Ut of the thermocouple 3 is less than or equal to the constant ΔU, it is determined that the firepower is reduced and the firepower value is displayed. If the absolute value of the change in the thermoelectric potential Ut of the thermocouple 3 is greater than the constant ΔU, it is determined that the gas stove is turned off. If it is detected that the gas pressure value Pt decreases, and the absolute value of the change in the thermoelectric potential Ut of the thermocouple 3 is less than or equal to the constant ΔU, it is determined that the firepower is increased and the firepower value is displayed; if it is detected that the gas pressure value Pt is basically unchanged, and the absolute value of the change in the thermoelectric potential Ut of the thermocouple 3 is greater than the constant ΔU, it is determined that the gas stove is accidentally turned off and the operating status is displayed.

[0095] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A method for controlling the firepower display of a gas stove, wherein the gas is ejected and burned through a gas valve (1), characterized in that: The following steps are involved: S1, obtaining the gas pressure value in the gas valve (1); S2, obtaining a detection value of a fire detection module, wherein the detection value of the fire detection module can change according to a change in the flame temperature of the gas stove; S3, if the gas pressure value increases and the detection value of the fire detection module has a first preset change trend, the ignition is successful and S4 is executed, otherwise the ignition fails and S5 is executed; S4, displaying the fire power value of the gas stove according to the gas pressure value; S5. Issue the first warning signal.

2. The gas stove firepower display control method according to claim 1, characterized in that: The gas stove firepower display control method also includes the following steps: S6, the gas valve (1) is screwed; S7, determining whether the gas pressure value increases within a unit time, if yes, executing S8, if no, executing S9; S8. If the detection value of the firepower detection module has a second preset change trend, the firepower value is reduced and displayed, otherwise it is in a fire-off state and displayed; S9. If the detection value of the firepower detection module has a second preset change trend, the firepower value increases and is displayed; otherwise, it is an unexpected flameout state and a second warning signal is issued.

3. The gas stove firepower display control method according to claim 2, characterized in that: The fire detection module comprises a thermocouple (3), the thermoelectric potential of the thermocouple (3) increases as the temperature rises; The first preset change trend is: the thermoelectric potential of the thermocouple (3) is greater than zero and presents an upward trend; The second preset change trend is that the absolute value of the change in the thermoelectric potential of the thermocouple (3) per unit time is greater than a preset constant.

4. A gas stove, characterized in that: The gas stove is controlled by the gas stove firepower display control method according to any one of claims 1 to 3, wherein the gas stove comprises: A gas valve (1), through which the gas is ejected and burned; A pressure detection module (2), wherein a detection end of the pressure detection module (2) extends into the gas valve (1) and is used to obtain the gas pressure value; A fire detection module is arranged inside the burner of the gas stove; A firepower display module (4), used for displaying the firepower value of the gas stove and the operating status of the gas stove; The control module (5) is communicatively connected to the pressure detection module (2), the firepower detection module and the firepower display module (4).

5. The gas stove according to claim 4, characterized in that: The gas valve (1) comprises: A valve body (11), wherein the valve body (11) is provided with a valve body air inlet (111), a gas passage (112), a mounting groove (113) and a valve body air outlet (114) in sequence along the air flow direction, and the valve body air inlet (111) is connected to the gas passage (112) in a blockable manner; A valve core (12), the valve core (12) being rotatably arranged in the mounting groove (113), the valve core (12) being provided with a core cavity (121) and a valve core inlet (122) and a valve core outlet (123) communicating with the core cavity (121), the core cavity (121) being communicated with the gas passage (112) via the valve core inlet (122), the core cavity (121) being communicated with the valve body air outlet (114) via the valve core outlet (123), and when the valve core (12) is rotated, the overlap between the valve core outlet (123) and the valve body air outlet (114) changes; The detection end of the pressure detection module (2) extends into the gas channel (112).

6. The gas stove according to claim 5, characterized in that: A first sealing structure is provided between the pressure detection module (2) and the tube wall of the gas channel (112).

7. The gas stove according to claim 5, characterized in that: The valve body (11) is also provided with a control channel (115), and a solenoid valve (13) is provided in the control channel (115); a valve stem (131) of the solenoid valve (13) is capable of moving along the control channel (115) to open or block the valve body air inlet (111) and the gas channel (112); A second sealing structure is provided between the valve stem (131) and the gas channel (112).

8. The gas stove according to claim 7, characterized in that: The cross-sectional area of ​​the gas channel (112) is larger than the cross-sectional area of ​​the valve core outlet (123), and the cross-sectional area of ​​the gas channel (112) is smaller than the cross-sectional area of ​​the control channel (115) and the cross-sectional area of ​​the valve body air inlet (111).

9. The gas stove according to any one of claims 4 to 8, characterized in that: The pressure detection module (2) comprises a pressure sensor.

10. The gas stove according to any one of claims 4 to 8, characterized in that: The firepower display module (4) comprises a display screen and / or a display light assembly.

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