An electromagnetic valve, an electromagnetic valve control method and a cooking appliance

Abstract

The present invention relates to a solenoid valve, a solenoid valve control method and a cooking appliance. The solenoid valve receives an ignition signal, and the electronic control board outputs a voltage signal to the coil; after a set time, the power input unit is controlled to act, driving the actuator to push the valve core to move to connect the air inlet passage; the voltage signal is used to maintain the energized and attracted state of the coil, so that the air inlet passage is maintained in a connected state; the solenoid valve receives a flameout signal, the electronic control board cuts off the voltage signal, and the coil is de-energized to drive the valve core to reset and disconnect the air inlet passage. The overall structure of the present invention is simple. The electronic control board is used to provide a voltage signal for the solenoid valve to maintain the attracted state, and the actuator is used to push open the valve core to open the air inlet passage, avoiding the process in traditional cooking appliances that requires pressing the knob for a long time waiting for the thermocouple to heat up to generate an induced voltage to maintain the open state of the solenoid valve, with better control performance and greatly improving the use experience effect.

Description

Technical Field

[0001] The present invention relates to a household gas appliance, and particularly to a solenoid valve, a solenoid valve control method, and a cooking stove. Background Art

[0002] With the increasing improvement of people's living standards, people's requirements for various performances of gas stoves are also getting higher and higher. Generally, a solenoid valve is installed on the cooking stove to control the on-off of gas. Currently, the opening method of the solenoid valve on the gas stoves in the market is that when the knob is pressed down, the top shaft of the valve body is used to push open the solenoid valve, and after opening, it needs to be pressed down for 3 - 5 s. After the temperature of the thermocouple rises to generate an induced voltage, a small current is generated through the circuit formed with the solenoid valve winding to maintain the open state of the valve body. This way of opening the solenoid valve is the traditional way of using a cooking stove, and the control performance during ignition is poor. With the development and progress of society, people's requirements for experience are getting higher and higher. Therefore, the traditional way of opening the solenoid valve can no longer meet people's increasingly high requirements for the experience effect of the cooking stove. Summary of the Invention

[0003] The main technical problem to be solved by the present invention is to provide a solenoid valve with a simple structure, good control performance, and capable of greatly improving the use experience effect. At the same time, a control method for the solenoid valve and a cooking stove equipped with the solenoid valve and adopting the solenoid valve control method are provided.

[0004] To achieve the above object, the technical solution of the present invention is as follows:

[0005] A solenoid valve includes a valve body, a coil, a valve core, a valve component, and an actuator. The valve body is composed of an air inlet cavity and an air collection cavity that are interconnected. An air inlet hole is provided on the valve body of the air inlet cavity, and a valve component is provided on the air collection cavity. The coil and the valve core are installed in the air inlet cavity. The valve core is used to connect or disconnect the air inlet passage between the air inlet hole and the air collection cavity. The coil is connected to an electronic control board through a wire, and the electronic control board provides a voltage signal for maintaining the suction state to the coil. The actuator is connected to a power input unit, and the power input unit drives the actuator to move to selectively push the valve core to connect the air inlet passage.

[0006] Further, the actuator is installed in the air collection cavity.

[0007] Further, the actuator includes a rotating wheel and a pulling block. The pulling block extends from the side of the rotating wheel, and the other end of the pulling block can selectively contact the valve core. When the power input unit drives the rotating wheel to rotate, the pulling block is driven to rotate and then push the valve core to move along the air inlet cavity.

[0008] Further, the air inlet cavity and the air collection cavity of the valve body are integrally arranged in an L shape, and the air inlet cavity is arranged as a long cylindrical structure on one side of the air collection cavity.

[0009] Furthermore, the valve assembly includes a stacked adjustable valve and a fixed valve. An adjustable air hole and a fixed air hole are correspondingly arranged on the adjustable valve and the fixed valve, and the gas flow is adjusted by changing the size of the overlapping part between the adjustable air hole and the fixed air hole.

[0010] Another technical solution of the present invention is:

[0011] A solenoid valve control method includes the following steps:

[0012] The solenoid valve receives an ignition signal, and the electronic control board outputs a voltage signal to the coil;

[0013] After a set time, the power input unit is controlled to act, driving the actuator to push the valve core to move and connect the intake passage;

[0014] The voltage signal is used to maintain the energized and attracted state of the coil, so that the intake passage remains in the connected state;

[0015] The solenoid valve receives a flameout signal, the electronic control board cuts off the voltage signal, and the coil is de-energized to drive the valve core to reset and disconnect the intake passage.

[0016] Furthermore, the set time is 1-2 seconds.

[0017] Furthermore, the electronic control board judges the working state of the stove according to the signal collected by the thermocouple. When it is detected that the stove is in the flameout state, the electronic control board cuts off the voltage signal, and the coil is de-energized to drive the valve core to reset and disconnect the intake passage.

[0018] Another technical solution of the present invention is:

[0019] A stove includes an intake pipe and a burner head. The solenoid valve described above is installed on the intake pipe, and the intake hole is communicated with the intake pipe

[0020] A stove includes an intake pipe and a burner head. A solenoid valve is installed on the intake pipe, and the solenoid valve adopts the solenoid valve control method described above.

[0021] In summary, a solenoid valve, a solenoid valve control method and a stove provided by the present invention have a simple overall structure. The electronic control board is used to provide a voltage signal to maintain the attracted state of the solenoid valve, and the actuator is used to push open the valve core to open the intake passage, avoiding the process of pressing the knob for a long time in a traditional stove to wait for the thermocouple to heat up to generate an induced voltage to maintain the open state of the solenoid valve. The control performance is better, and the use experience effect is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of the solenoid valve of the present invention;

[0023] Figure 2is the structural explosion of the solenoid valve of the present invention Figure 1 ;

[0024] Figure 3 is the structural explosion of the solenoid valve of the present invention Figure 2 ;

[0025] Figure 4 is the schematic structural diagram of the solenoid valve of the present invention in the closed state;

[0026] Figure 5 is the schematic structural diagram of the solenoid valve of the present invention in the open state.

[0027] As Figures 1 to 5 shown, the valve body 1, coil 2, valve core 3, valve assembly 4, actuator 5, air inlet hole 6, air hole 7, air inlet cavity 8, air collecting cavity 9, wire 10, air inlet passage 11, rotating wheel 12, pulling block 13, ejector rod 14, valve plug 15, fixed valve 16, adjustable valve 17, adjustable air hole 18, fixed air hole 19, support spring 20, receiving groove 21, convex platform 22, adjusting rod 23. Detailed implementation manners

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners:

[0029] As Figures 1 to 3 shown, a solenoid valve provided by the present invention includes a valve body 1, a coil 2, a valve core 3, a valve assembly 4 and an actuator 5. An air inlet hole 6 is provided on the valve body 1, and the air inlet hole 6 is communicated with an air inlet pipe (not shown in the figure) on the cooker. The valve assembly 4 has an air hole 7 for discharging air, and the air hole 7 is connected to a burner head (not shown in the figure) through a gas pipe. The gas sequentially passes through the air inlet pipe, the air inlet hole 6, the solenoid valve, the air hole 7, the gas pipe, and finally enters the burner of the burner head for combustion.

[0030] As Figure 2 and Figure 3 shown, the valve body 1 is composed of an air inlet cavity 8 and an air collecting cavity 9 that are communicated with each other. The air inlet hole 6 is opened on the valve body 1 of the air inlet cavity 8, and the valve assembly 4 is installed on the air collecting cavity 9. The air inlet cavity 8 and the air collecting cavity 9 are integrally arranged in an L shape. The air inlet cavity 8 is integrally in a long cylindrical structure, and the air collecting cavity 9 is integrally in a flat cylindrical structure. The air inlet cavity 8 is arranged on one side of the air collecting cavity 9.

[0031] A coil 2 and a valve core 3 are installed in the air inlet cavity 8, and the coil 2 and the valve core 3 move along the air inlet cavity 8 in the air inlet cavity 8. The valve core 3 is used to connect or disconnect the air inlet passage 11 between the air inlet hole 6 and the air collecting cavity 9. The valve core 3 is composed of an ejector rod 14 and a valve plug 15, and the ejector rod 14 drives the valve plug 15 to move. As Figure 4 and Figure 5As shown, the coil 2 is divided into two sections. The bottom end of one section abuts against the bottom of the valve body of the intake cavity 8, and the other end abuts against the valve plug 15. The bottom end of the other section of the coil 2 is fixed to the valve body, and the other end is fixed to the push rod 14. When the actuator 5 drives the push rod 14 to move, it drives the two sections of the coil 2 to compress and the valve plug 15 to move. The coil 2 is connected to an electronic control board (not shown in the figure) through a wire 10, and the wire 10 passes out from the end of the valve body 1. In this embodiment, preferably, the electronic control board provides a voltage signal to the coil 2, and the coil 2 uses this voltage signal to maintain the suction state, thereby maintaining the open state of the solenoid valve. After the electronic control board cuts off the voltage signal, the coil 2 is powered off, and the coil 2 resets to make the solenoid valve return to the closed state.

[0032] The actuator 5 is connected to a power input unit (not shown in the figure), and the power input unit drives the actuator 5 to move to selectively push the valve core 3 to connect the intake passage 11. In this embodiment, in order to make the structure more compact, it is preferably to install the actuator 5 in the air collecting cavity 9. The power input unit preferably uses a motor, and the motor is automatically controlled by the electronic control board.

[0033] In this embodiment, the actuator includes a rotating wheel 12 and a pulling block 13. The pulling block 13 extends from the side of the rotating wheel 12, and the other end of the pulling block 13 selectively abuts against the push rod 14 of the valve core 3. The output shaft of the motor passes through the valve body 1 of the air collecting cavity 9 and is fixedly connected to the rotating wheel 12. When the electronic control board receives the ignition signal, it controls the motor to start. The motor drives the rotating wheel 12 to rotate, and the rotating wheel 12 drives the pulling block 13 to rotate. The pulling block 13 pushes the push rod 14 to move along the intake cavity 8. When the push rod 14 moves, it drives the valve plug 15 to move and at the same time compresses the two sections of the coil 2 respectively, opening the intake passage 11 between the intake hole 6 and the air collecting cavity 9. The rotation angle and speed of the rotating wheel 12 can be controlled by the electronic control board. The electronic control board can control the rotating wheel 12 to rotate one week each time. After the pulling block 13 pushes the push rod 14, it disengages from the push rod 14 and then continues to rotate to the initial position to wait for the next instruction. Or, the electronic control board controls the rotating wheel 12 to rotate a fixed angle each time. This angle is from the initial position of the pulling block 13 to the position where it disengages from the push rod 14. After disengagement, it stops rotating. When waiting for the next instruction, it first rotates from the initial position to the fixed rotation angle.

[0034] As Figure 4 and Figure 5 shown, when the rotating wheel 12 drives the valve core 3 to act, it drives the coil 2 to be compressed and sucked along the intake cavity 8. The coil 2 always remains in the suction state under the action of the voltage signal, thereby keeping the valve core 3 in the open state of the intake passage 11. After the coil 2 is powered off, the coil 2 resets and drives the valve core 3 to reset, disconnecting the intake passage 11 and making the solenoid valve return to the closed state.

[0035] The valve assembly 4 includes a stacked adjustable valve 17 and a fixed valve 16. The adjustable valve 17 is installed above the fixed valve 16. An adjustable air hole 18 is provided on the adjustable valve 17, and a fixed air hole 19 is provided on the fixed valve 16. The adjustable air hole 18 and the fixed air hole 19 are correspondingly arranged. The gas flow rate into the burner of the stove is adjusted by changing the size of the overlapping part between the adjustable air hole 18 and the fixed air hole 17 (i.e., the size of the air hole 7).

[0036] The adjustable valve 17 and the fixed valve 16 are hermetically connected to the valve body 1 of the gas collecting chamber 9. The gas can only flow out through the adjustable air hole 18 and the fixed air hole 19. A support spring 20 is installed in the gas collecting chamber 9. The bottom of the support spring 20 abuts against the rotating wheel 12. An annular receiving groove 21 for receiving the support spring 20 is provided on the upper surface of the rotating wheel 12. The top of the support spring 20 abuts against the lower surface of the adjustable valve 17. An annular boss 22 extends downward from the lower surface of the adjustable valve 17, and the boss 22 is inserted into the support spring 20.

[0037] An adjusting rod 23 also extends downward from the adjustable valve 17. The adjusting rod 23 can pass through the fixed valve 16 and the valve body 1 and be connected to the motor. The motor automatically rotates the adjusting rod 23 according to the working instruction, so that the adjustable valve 17 rotates relative to the fixed valve 16, thereby adjusting the size of the air hole 7 to adjust the gas flow rate and the firepower. It can also be directly connected to an adjusting knob, and the size of the air hole 7 can be manually adjusted by a person to adjust the gas flow rate and the firepower.

[0038] As Figure 2 and Figure 3 shown, in this embodiment, the adjustable air hole 18 on the adjustable valve 17 is fan-shaped, and the fixed air hole 19 on the fixed valve 16 is in the shape of a "knife", which is composed of a fan-shaped hole part 19a and a triangular hole part 19b. The triangular hole part 19b extends from the fan-shaped hole part 19a to one side. The shapes and sizes of the fan-shaped hole parts 19a of the adjustable air hole 18 and the fixed air hole 19 are the same.

[0039] During operation, when the adjustable valve 17 rotates relative to the fixed valve 16 and the fan-shaped fixed air hole 19 completely coincides with the fan-shaped hole part on the adjustable air hole 18, the gas flow rate is the largest. At this time, the gas stove is in the maximum firepower state. As the adjustable valve 17 continues to rotate, the overlapping area between the fixed air hole 19 and the adjustable air hole 18 becomes smaller and smaller, the gas flow rate decreases accordingly, and the firepower also decreases. When there is no overlapping area between the fixed air hole 19 and the adjustable air hole 18, the gas flow rate is zero and the burner is closed.

[0040] A solenoid valve control method provided by the present invention, as Figure 4 and Figure 5 shown, includes the following steps:

[0041] AsFigure 4 As shown, the solenoid valve is in a closed state. At this time, the valve core 3 disconnects the air intake passage 11.

[0042] The solenoid valve receives an ignition signal, and the electronic control board outputs a voltage signal to the coil 2. At this time, the coil 2 is already in an energized state.

[0043] After a set time controlled by the electronic control board, the motor is started. This set time is preferably 1 - 2 seconds, that is, to ensure that the coil 2 is energized before controlling the motor to start. After the motor starts, it drives the rotating wheel 12 to rotate. When the rotating wheel 12 rotates, it drives the pulling block 13 to rotate. The pulling block 13 pushes the ejector rod 14 to move along the air intake cavity 8 to one side. When the ejector rod 14 moves, it drives the valve plug 15 to move, as Figure 5 shown, to open the air intake passage 11 between the air intake hole 6 and the air collecting cavity 9. During this process, the coil 2 is compressed and attracted.

[0044] During the process of opening the air intake passage 11, the voltage signal provided by the electronic control board is always used to maintain the energized state of the coil 2, and thus maintain the solenoid valve in an open state. At this time, the gas can enter from the air intake hole 6, pass through the air intake cavity 8, and then enter the air collecting cavity 9. The gas is input into the burner of the stove top through the air collecting cavity 9 for combustion.

[0045] After the solenoid valve receives a signal to turn off the fire, the voltage signal is cut off through the electronic control board, the coil 2 is de-energized and reset, and then drives the valve core 3 to reset and disconnect the air intake passage 11.

[0046] During the operation of the stove, the electronic control board judges the state of the stove in real time according to the signal collected by the thermocouple. When it detects that it is in an extinguished state, the electronic control board actively cuts off the voltage signal, de-energizes the coil 2, and then drives the valve core 3 to reset and disconnect the air intake passage 11 to turn off the gas to ensure safety.

[0047] Embodiment 2:

[0048] In this embodiment, a stove is provided, including an air inlet pipe and a stove top. A solenoid valve as described in Embodiment 1 is installed on the air inlet pipe. The air intake hole 6 on the solenoid valve is communicated with the air inlet pipe, and the air hole 7 is communicated with the stove top through a pipeline. The solenoid valve is controlled by the solenoid valve control method as described in Embodiment 1. When the solenoid valve is in an open state, the gas sequentially passes through the air inlet pipe, the air intake hole 6, the air intake cavity 8, the air collecting cavity 9, the air hole 7, the gas pipeline, and finally enters the burner of the stove top for combustion.

[0049] As described above, in combination with the content of the solution given in the accompanying drawings, similar technical solutions can be derived. Any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A solenoid valve, characterized in that: It includes a valve body, a coil, a valve core, a valve assembly and an actuator. The valve body is composed of an air inlet cavity and a gas collecting cavity that communicate with each other. An air inlet hole is provided on the valve body of the air inlet cavity, and the air inlet hole is communicated with the air inlet pipe on the cooking stove. A valve assembly is provided on the gas collecting cavity, and the valve assembly has an air hole for discharging gas. The air hole is connected to the burner through a gas pipe. A coil and a valve core are installed in the air inlet cavity. The coil and the valve core move along the air inlet cavity in the air inlet cavity. The valve core is used to connect or disconnect the air inlet passage between the air inlet hole and the gas collecting cavity. The coil is connected to an electronic control board through a wire. The electronic control board provides a voltage signal for maintaining the suction state to maintain the open state of the solenoid valve. After the electronic control board cuts off the voltage signal, the coil is powered off, and the coil resets to make the solenoid valve return to the closed state. The actuator is connected to a power input unit. The power input unit drives the actuator to move to selectively push the valve core to move along the air inlet cavity while the coil is compressed and sucked to connect the air inlet passage. The power input unit is automatically controlled by the electronic control board.

2. The solenoid valve according to claim 1, characterized in that: The actuator is installed in the gas collecting cavity.

3. A solenoid valve according to claim 1 or 2, characterized in that: The actuator includes a rotating wheel and a pulling block. The pulling block extends from the side of the rotating wheel, and the other end of the pulling block can selectively contact the valve core. When the power input unit drives the rotating wheel to rotate, it drives the pulling block to rotate and then pushes the valve core to move along the air inlet cavity.

4. A solenoid valve according to claim 1, characterized in that: The air inlet cavity and the gas collecting cavity of the valve body are integrally arranged in an L shape. The air inlet cavity is a long cylindrical structure and is arranged on one side of the gas collecting cavity.

5. A solenoid valve according to claim 1, characterized in that: The valve assembly includes a tunable valve and a fixed valve that are stacked. A tunable air hole and a fixed air hole are correspondingly provided on the tunable valve and the fixed valve. The gas flow rate is adjusted by changing the size of the overlapping part of the tunable air hole and the fixed air hole.

6. A solenoid valve control method for the solenoid valve according to any one of claims 1-5, characterized in that, It includes the following steps: The solenoid valve receives an ignition signal, and the electronic control board outputs a voltage signal to the coil; After a set time, control the power input unit to act, drive the actuator to push the valve core to move while the coil is compressed and sucked to connect the air inlet passage; Use the voltage signal to maintain the energized and sucked state of the coil, so that the air inlet passage is maintained in a connected state; The solenoid valve receives a flameout signal, the electronic control board cuts off the voltage signal, and the coil is powered off to drive the valve core to reset and disconnect the air inlet passage.

7. A solenoid valve control method according to claim 6, characterized in that: The set time is 1-2 seconds.

8. A solenoid valve control method according to claim 6, characterized in that: The electronic control board judges the working state of the cooking stove according to the signal collected by the thermocouple. When it detects that it is in a flameout state, the electronic control board cuts off the voltage signal, and the coil is powered off to drive the valve core to reset and disconnect the air inlet passage.

9. A cooking appliance, comprising an intake pipe and a burner head, characterized in that: Install the solenoid valve as described in any one of claims 1-5 on the air inlet pipe.

10. A cooking appliance, comprising an intake pipe and a burner head, wherein a solenoid valve is installed on the intake pipe, and characterized in that: The solenoid valve adopts the solenoid valve control method as described in any one of claims 6-8.

Images