Gas valve and cooking equipment

Abstract

The utility model discloses a gas valve and cooking equipment. The gas valve comprises a direct current motor; the detection structure is used for detecting the number of rotation turns of the direct current motor; the input end of the reduction gearbox is connected with a motor output shaft of the direct current motor; the valve plate is connected with a speed reduction output shaft of the speed reduction box; a fuel gas inlet and a fuel gas outlet are formed in the fuel gas adjusting box, the valve plate extends into the fuel gas adjusting box, and when the direct-current motor rotates, the valve plate can conduct one or more of uniform acceleration motion, uniform linear motion and uniform deceleration motion between the positions where the fuel gas outlet is closed and opened. The utility model provides a gas valve which can achieve automatic fire power adjustment and is high in adjustment precision.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen appliances, in particular to a gas valve and cooking equipment. Background Art

[0002] With the development of society and the advancement of technology, people's quality of life requirements are getting higher and higher. People who like to eat barbecue hope to be able to barbecue at home. However, traditional electric ovens are limited by power and cannot achieve the instantaneous high-temperature baking effect of fire. Ordinary gas ovens can only roughly adjust the fire through the stopcock, and cannot achieve precise fire control, which results in a very bad user experience.

[0003] Therefore, there is an urgent need for a gas valve and cooking equipment to solve the above problems. Utility Model Content

[0004] The present invention aims to solve one of the problems existing in the existing related technologies to at least a certain extent. To this end, the present invention provides a gas valve that can automatically adjust the firepower with high adjustment accuracy.

[0005] The above purpose is achieved through the following technical solutions:

[0006] A gas valve, comprising:

[0007] DC motor;

[0008] A detection structure for detecting the number of rotations of the DC motor;

[0009] a reduction gearbox, the input end of which is connected to the motor output shaft of the DC motor;

[0010] A valve plate connected to the reduction output shaft of the reduction box;

[0011] A gas regulating box is provided with a gas inlet and a gas outlet, and the valve plate extends into the gas regulating box. When the DC motor rotates, the valve plate can perform one or more of uniform acceleration motion, uniform linear motion and uniform deceleration motion between the positions of closing and opening the gas outlet.

[0012] Optionally, the detection structure includes:

[0013] A Hall element is mounted on the housing of the DC motor or is arranged on one side of the DC motor;

[0014] A magnet is mounted on the motor output shaft. When the motor output shaft drives the magnet to rotate to a first position close to the Hall element, the Hall element outputs a low level. When the motor output shaft drives the magnet to rotate to a second position away from the Hall element, the Hall element outputs a high level.

[0015] Optionally, a limiting structure is further included, which is arranged in the gas regulating box and is used to limit the movement stroke of the valve plate.

[0016] Optionally, it also includes a first limit member and a second limit member, the first limit member is arranged on the first side of the gas outlet, and the second limit member is arranged on the second side of the gas outlet, the first side of the gas outlet and the second side of the gas outlet are arranged opposite to each other, when the valve plate moves to contact with the first limit member, the valve plate completely closes the gas outlet, and when the valve plate moves to contact with the second limit member, the valve plate completely opens the gas outlet.

[0017] On the other hand, the present invention provides a cooking device, comprising the above-mentioned gas valve, wherein the gas valve operates according to the above-mentioned gas valve control method.

[0018] Optionally, a main control board is further included, and the main control board is communicatively connected to the detection structure.

[0019] Optionally, a display operation panel is further included, and the display operation panel is communicatively connected to the main control panel.

[0020] Compared with the prior art, the present invention has at least the following beneficial effects:

[0021] The gas valve provided by the utility model includes a DC motor, a detection structure, a reduction gearbox, a valve disc, and a gas regulating box. The detection structure is used to detect the number of revolutions of the DC motor. The input end of the reduction gearbox is connected to the motor output shaft of the DC motor. The valve disc is connected to the reduction gear output shaft of the reduction gearbox. The gas regulating box is provided with a gas inlet and a gas outlet. The valve disc extends into the gas regulating box. When the DC motor rotates, the valve disc can perform one or more of uniform acceleration, uniform linear motion, and uniform deceleration between closing and opening the gas outlet. The detection structure is provided to detect the total number of revolutions of the DC motor from fully closing the gas outlet to fully opening the gas outlet. The total number of revolutions is allocated to each gas outlet gear. The DC motor is then rotated to the corresponding number of revolutions according to the gear command set by the user. The DC motor is stably started through uniform acceleration and accurately stopped through uniform deceleration. This prevents the DC motor from rotating more than the preset number of revolutions due to the inability to directly brake, thereby improving the regulation accuracy of the gas outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of a gas valve provided by a specific embodiment of the utility model;

[0023] Figure 2It is a step diagram of a gas valve control method provided by a specific embodiment of the utility model.

[0024] In the picture:

[0025] 1. Gas regulating box; 11. Gas inlet; 12. Gas outlet;

[0026] 21. First stopper; 22. Second stopper;

[0027] 3. Reducer box; 31. Reducer output shaft;

[0028] 4. Valve plate;

[0029] 5. DC motor; 51. Motor output shaft;

[0030] 6. Magnet;

[0031] 7. Hall element. DETAILED DESCRIPTION

[0032] The following examples illustrate the present invention, but the present invention is not limited by these examples. Modifications to the specific embodiments of the present invention or equivalent replacements of some technical features without departing from the spirit of the present invention should be included in the scope of the technical solution claimed in the present invention.

[0033] Please refer to Figure 1 The utility model provides a gas valve, including a DC motor 5, a detection structure, a reduction gear box 3, a valve plate 4 and a gas regulating box 1. The detection structure is used to detect the number of rotations of the DC motor 5. The input end of the reduction gear box 3 is connected to the motor output shaft 51 of the DC motor 5. The valve plate 4 is connected to the reduction output shaft 31 of the reduction gear box 3. A gas inlet 11 and a gas outlet 12 are provided on the gas regulating box 1, and the valve plate 4 extends into the gas regulating box 1. When the DC motor 5 rotates, the valve plate 4 can perform one or more of uniform acceleration motion, uniform linear motion and uniform deceleration motion between the positions of closing and opening the gas outlet 12. By setting a detection structure to detect the total number of revolutions of the DC motor 5 from driving the valve plate 4 to completely close the gas outlet 12 to driving the valve plate 4 to completely open the gas outlet 12, the total number of revolutions is allocated to each gas outlet gear, and then the DC motor 5 is rotated to the corresponding number of revolutions according to the gear instruction set by the user. The stable startup of the DC motor 5 is achieved through uniform acceleration motion, and the precise stopping of the DC motor 5 is achieved through uniform deceleration motion, thereby avoiding the actual number of revolutions of the DC motor 5 being greater than the preset number of revolutions due to the inability to directly brake, thereby improving the adjustment accuracy of the gas outlet 12.

[0034] Optionally, the detection structure includes a Hall element 7 and a magnet 6. The Hall element 7 is mounted on the housing of the DC motor 5 or is arranged on one side of the DC motor 5. The magnet 6 is mounted on the motor output shaft 51. When the motor output shaft 51 drives the magnet 6 to rotate to a first position close to the Hall element 7, the Hall element 7 outputs a low level. When the motor output shaft 51 drives the magnet 6 to rotate to a second position away from the Hall element 7, the Hall element 7 outputs a high level, thereby realizing the calculation of the number of rotations of the DC motor 5.

[0035] In other embodiments, the detection structure may also be a photoelectric sensor, which can also realize the calculation of the number of rotations of the DC motor 5. This is a prior art and will not be described in detail here.

[0036] Optionally, a limiting structure is further included, which is arranged in the gas regulating box 1 and is used to limit the movement stroke of the valve plate 4.

[0037] Optionally, a first limiter 21 and a second limiter 22 are further included. The first limiter 21 is arranged on a first side of the gas outlet 12, and the second limiter 22 is arranged on a second side of the gas outlet 12. The first side of the gas outlet 12 and the second side of the gas outlet 12 are arranged opposite each other. When the valve disc 4 moves to contact the first limiter 21, the valve disc 4 completely closes the gas outlet 12. When the valve disc 4 moves to contact the second limiter 22, the valve disc 4 completely opens the gas outlet 12. By providing the first limiter 21 and the second limiter 22, the movement range of the valve disc 4 is limited.

[0038] In other embodiments, the limiting structure can also be set as a slide groove and a slider, wherein the slide groove is opened on the inner wall of the gas regulating box 1, and the slider is set on the valve plate 4. The slider slides in the slide groove, thereby limiting the movement stroke of the valve plate 4.

[0039] Optionally, the reduction ratio of the reduction box 3 is 1000:1.

[0040] Please refer to Figure 1 and Figure 2 The gas valve provided by this utility model operates specifically according to the following steps:

[0041] S1: Start gas valve;

[0042] S2: Determine whether the gas valve has been initialized. If not, go to S3. If yes, go to S4:

[0043] S3: Initialize the gas valve to obtain the total number of rotations of the DC motor 5 from driving the valve plate 4 from completely closing the gas outlet 12 to completely opening the gas outlet 12, and distribute the total number of rotations of the DC motor 5 to each gas outlet gear. For example, ten gas outlet gears are set, and each gas outlet gear is evenly distributed. The ignition gear is the seventh gear. When the first gear is selected, the DC motor 5 rotates 30 times; when the second gear is selected, the DC motor 5 rotates 60 times... When the seventh gear is selected, the DC motor 5 rotates 210 times; when the eighth gear is selected, the DC motor 5 rotates 240 times; when the ninth gear is selected, the DC motor 5 rotates 270 times; when the tenth gear is selected, the DC motor 5 rotates 300 times.

[0044] S4: Obtain the target number of rotations C0 of the DC motor 5;

[0045] S5: Determine whether C0 ≥ 2C1. If so, it means that the target number of rotations C0 of the DC motor 5 is large, and uniform acceleration and deceleration are required to increase the operating speed of the valve plate 4, thereby increasing the speed of opening the gas valve. At this time, enter S6;

[0046] S6: The DC motor 5 is uniformly accelerated to a first preset speed V01 within a first preset time T1, and then performs uniform linear motion at the speed V01;

[0047] S7: Determine whether C2 = C0 - C1. If so, it means that the DC motor 5 needs to enter uniform deceleration motion to ensure that it stops in time when it reaches the target number of rotations C0. At this time, the process proceeds to S8. If not, it means that the DC motor 5 does not need to enter uniform deceleration motion yet. At this time, S7 is repeated to maintain uniform linear motion.

[0048] S8: The DC motor 5 is decelerated uniformly to a stop within a second preset time T2;

[0049] Wherein, C1 is the number of revolutions of the DC motor 5 during uniform acceleration or uniform deceleration; and C2 is the actual number of revolutions of the DC motor 5.

[0050] Optionally, S6 includes the following steps:

[0051] S41: Calculating the current speed of the DC motor 5 within the first preset time T1. The DC motor 5 is uniformly accelerated according to V11 within the first preset time T1.

[0052] S42: Determine whether V11 = V0. If so, the DC motor 5 enters uniform linear motion. If not, repeat S42.

[0053] Wherein, F is the pulse width adjustment driving frequency of the DC motor 5, and N is the sequence of the pulses output by the DC motor 5 in the previous stage.

[0054] Optionally, S7 includes the following steps:

[0055] S71: Calculate the current speed of the DC motor 5 within the second preset time T2, and the DC motor 5 runs at a uniform deceleration rate V12 within the second preset time T2;

[0056] S72: Determine whether V12=0. If so, the DC motor 5 stops running. If not, repeat S72.

[0057] Optionally, S3 includes the following steps:

[0058] S31: The DC motor 5 drives the valve plate 4 to move to one of the positions of fully opening the gas outlet 12 and fully closing the gas outlet 12 and then stops operating;

[0059] S32: Clear the number of rotations of the DC motor 5;

[0060] S33: The DC motor 5 drives the valve plate 4 to move to the other of the positions of fully opening the gas outlet 12 and fully closing the gas outlet 12, and then stops running. The total number of rotations of the DC motor 5 at this time is calculated and saved.

[0061] S34: Allocate the total number of rotations of the DC motor 5 to each gas outlet gear position.

[0062] Optionally, in S5, if C0<2C1, it means that the target number of rotations C0 of the DC motor 5 is small. At this time, if uniform acceleration or uniform deceleration is performed, the target number of rotations C0 will inevitably be exceeded. At this time, the DC motor 5 directly runs at the second preset speed V02 until C2=C0 and the DC motor 5 stops running, wherein V02<V01.

[0063] Optionally, T1=T2=1S, V01 is the maximum speed of the DC motor 5, and F=20KHz.

[0064] Specifically, at V01, the duty cycle of the DC motor 5 is 100%, and at V02, the duty cycle of the DC motor 5 is 10%.

[0065] On the other hand, the present invention provides a cooking device, comprising the above-mentioned gas valve, which operates according to the above-mentioned gas valve control method.

[0066] Optionally, a main control board is further included, which is connected to the input end of the Hall element 7 to obtain the high level and low level output by the Hall element 7, thereby calculating the number of rotations of the DC motor 5.

[0067] Optionally, a display operation panel is further included, which is in communication with the main control panel. A user can input a preset cooking temperature through the display operation panel, and the main control panel calculates the opening of the gas valve based on the preset cooking temperature, and then instructs the DC motor to rotate a corresponding number of revolutions.

[0068] The above descriptions are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A gas valve, characterized in that: include: DC motor (5); A detection structure for detecting the number of rotations of the DC motor (5); A reduction box (3), the input end of which is connected to the motor output shaft (51) of the DC motor (5); A valve plate (4) connected to a reduction output shaft (31) of the reduction box (3); A gas regulating box (1) is provided with a gas inlet (11) and a gas outlet (12), and the valve plate (4) extends into the gas regulating box (1). When the DC motor (5) rotates, the valve plate (4) can perform one or more of uniform acceleration motion, uniform linear motion and uniform deceleration motion between the positions of closing and opening the gas outlet (12).

2. The gas valve according to claim 1, characterized in that The detection structure includes: A Hall element (7) is mounted on the housing of the DC motor (5) or is arranged on one side of the DC motor (5); A magnet (6) is mounted on the motor output shaft (51). When the motor output shaft (51) drives the magnet (6) to rotate to a first position close to the Hall element (7), the Hall element (7) outputs a low level. When the motor output shaft (51) drives the magnet (6) to rotate to a second position away from the Hall element (7), the Hall element (7) outputs a high level.

3. The gas valve according to claim 1, characterized in that It also includes a limiting structure, which is arranged in the gas regulating box (1) and is used to limit the movement stroke of the valve plate (4).

4. The gas valve according to claim 3, characterized in that The invention also includes a first limiting member (21) and a second limiting member (22), wherein the first limiting member (21) is arranged on a first side of the gas outlet (12), and the second limiting member (22) is arranged on a second side of the gas outlet (12), and the first side of the gas outlet (12) and the second side of the gas outlet (12) are arranged relative to each other, and when the valve plate (4) moves to contact with the first limiting member (21), the valve plate (4) completely closes the gas outlet (12), and when the valve plate (4) moves to contact with the second limiting member (22), the valve plate (4) completely opens the gas outlet (12).

5. The gas valve according to any one of claims 1 to 3, characterized in that: The reduction ratio of the reduction box (3) is 1000:

1.

6. A cooking device, characterized in that: The gas valve comprises the gas valve according to any one of claims 1 to 5.

7. The cooking device according to claim 6, characterized in that It also includes a main control board, which is communicatively connected with the detection structure.

8. The cooking device according to claim 7, characterized in that It also includes a display operation panel, which is communicatively connected with the main control panel.

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