Ignition control circuit of gas clothes dryer

Abstract

The invention belongs to the field of intelligent household appliances, and particularly relates to an ignition control circuit of a gas clothes dryer. According to the circuit, through the synergistic effect of the control circuit, the ignition circuit, the fuel gas control circuit and the driving circuit, the safety of the fuel gas clothes dryer and the reliability of frequent ignition are achieved. After the control circuit receives the starting signal, the starting signal is sent to the ignition circuit and the drive circuit, and synchronous control over the ignition circuit and the drive circuit is achieved. The fuel gas control circuit controls the fuel gas valve to be opened according to the power source signal, fuel gas is provided for the ignition circuit, and control over fuel gas supply is achieved. The ignition circuit controls the fuel gas clothes dryer to enter a working state according to the starting signal and the fuel gas content, and normal operation of the fuel gas clothes dryer is guaranteed. According to the circuit design, the safety performance of the gas clothes dryer is improved, manual operation errors are reduced, and more convenient and safer use experience is provided for a user.

Description

Technical Field

[0001] This application belongs to the field of intelligent household appliances, and particularly relates to an ignition control circuit for a gas dryer. Background Art

[0002] With the development of technology and the improvement of people's living standards, gas dryers have gradually become an indispensable household appliance product. Gas dryers have the advantages of high efficiency, energy conservation, and environmental protection. They can dry clothes in a short time, saving the time for drying clothes and improving people's quality of life. In addition, gas dryers also have intelligent control functions, which can automatically adjust the drying time and temperature according to the humidity of the clothes to achieve the best drying effect.

[0003] Although gas dryers are widely used in households, there are still some deficiencies. First of all, the existing gas dryer solutions use relay control, which cannot meet the demand for millions of ignitions. The lifespan of the relay is limited, and it is prone to failure after long-term use, resulting in a reduction in the reliability of the gas dryer. Secondly, the existing gas module protection measures are not perfect enough, and safety hazards are likely to occur. Once the gas module fails, it may cause gas leakage and even lead to serious consequences such as fires. Finally, the existing gas dryers cannot give an alarm quickly. When an abnormal situation occurs, users cannot understand and take measures in time, increasing the safety risk. Therefore, all these situations will cause the gas dryer to be unable to ignite frequently.

[0004] Therefore, how to solve the problem that the gas dryer cannot ignite frequently, and then avoid the defects of short relay lifespan, large safety hazards, and inability to give an alarm quickly in the gas dryer, so as to improve the reliability of the gas dryer and ensure user safety, is the problem to be solved currently. Summary of the Invention

[0005] This application provides an ignition control circuit for a gas dryer, which is used to solve the problem that the gas dryer cannot ignite frequently, and then avoid the defects of short relay lifespan, large safety hazards, and inability to give an alarm quickly in the gas dryer, so as to improve the reliability of the gas dryer and ensure user safety.

[0006] In the first aspect, this application provides an ignition control circuit for a gas dryer. The ignition control circuit includes: a control circuit, an ignition circuit, a gas control circuit, and a drive circuit;

[0007] The control circuit is respectively connected to the ignition circuit and the drive circuit. The control circuit is used to receive the start signal of the gas dryer and send the start signal to the ignition circuit and the drive circuit respectively;

[0008] The gas control circuit is respectively connected to the ignition circuit and the drive circuit. The drive circuit is used to generate a power signal according to the start signal and send the power signal to the gas control circuit;

[0009] The gas control circuit is used to control the gas valve to open according to the power signal and supply gas to the ignition circuit;

[0010] The ignition circuit is used to control the gas dryer to enter the working state according to the start signal and the gas content.

[0011] Optionally, the ignition circuit includes a triode detection circuit, an amplifier detection circuit, and a thyristor detection circuit, where,

[0012] The triode detection circuit is connected to the amplifier detection circuit. The triode detection circuit is used to detect the electrical signal of the photosensitive triode, and the amplifier detection circuit is used to detect the electrical signal of the MOS tube;

[0013] The amplifier detection circuit is connected to the thyristor detection circuit. The thyristor detection circuit is used to detect the electrical signal of the thyristor.

[0014] Optionally, the triode detection circuit includes a first capacitor, a first resistor, and a triode control circuit, where the triode control circuit includes a second resistor, a third resistor, a power supply voltage, and a photosensitive triode;

[0015] The first capacitor is respectively connected to the control circuit and the triode control circuit. The triode control circuit is used to output the electrical signal of the photosensitive triode;

[0016] The triode control circuit is connected to the first resistor.

[0017] Optionally, it further includes:

[0018] The second resistor is respectively connected to the first capacitor, the third resistor, and the photosensitive triode;

[0019] The third resistor is respectively connected to the power supply voltage and the photosensitive triode;

[0020] The photosensitive triode is respectively connected to the power supply voltage and the first resistor.

[0021] Optionally, the amplifier detection circuit includes a second capacitor, a fourth resistor, and an amplifier control circuit, where the amplifier control circuit includes a fifth resistor, a MOS tube, and a ground terminal;

[0022] The second capacitor is respectively connected to the triode detection circuit, the fourth resistor, and the amplifier control circuit, and the amplifier control circuit is used to output the electrical signal of the MOS transistor;

[0023] The fourth resistor is respectively connected to the triode detection circuit and the amplifier control circuit;

[0024] The amplifier control circuit is connected to the thyristor detection circuit.

[0025] Optionally, it further includes:

[0026] The fifth resistor is respectively connected to the second capacitor, the fourth resistor, the MOS transistor, and the ground terminal;

[0027] The MOS transistor is respectively connected to the thyristor detection circuit and the ground terminal.

[0028] Optionally, the thyristor detection circuit includes the power supply voltage, the air pressure switch, and the thyristor control circuit, wherein the thyristor control circuit includes a sixth resistor and a thyristor;

[0029] The power supply voltage is connected to the air pressure switch, and the air pressure switch is used to detect the pressure in the combustion chamber of the gas dryer;

[0030] The air pressure switch is connected to the thyristor control circuit, and the thyristor control circuit is used to output the electrical signal of the thyristor;

[0031] The sixth resistor is respectively connected to the thyristor and the amplifier detection circuit;

[0032] The thyristor is connected to the gas control circuit.

[0033] Optionally, the drive circuit includes a relay control circuit and a detection circuit, wherein the relay control circuit includes an L-line relay control circuit and an N-line main relay control circuit;

[0034] The detection circuit includes a thermostat detection circuit and an inner drum NTC detection circuit. The thermostat detection circuit is used to detect the temperature at the outlet and the inlet of the inner drum of the gas dryer, and the inner drum NTC detection circuit is used to detect the temperature of the inner drum of the gas dryer;

[0035] The L-line relay control circuit is connected to the gas control circuit;

[0036] The N-line main relay control circuit is respectively connected to the gas control circuit and the detection circuit;

[0037] The detection circuit is connected to the control circuit.

[0038] Optionally, the L-line relay control circuit includes an L-line relay, wherein,

[0039] the L-line relay is connected to the gas control circuit, and the L-line relay is used to control the power on / off of the gas dryer.

[0040] Optionally, the N-line main relay control circuit includes an N-line main relay, an inner drum inlet manual thermostat, an inner drum inlet thermostat, and an inner drum outlet thermostat, wherein,

[0041] the N-line main relay, the inner drum inlet manual thermostat, the inner drum inlet thermostat, and the inner drum outlet thermostat are connected in sequence according to the connection order, and the N-line main relay is used to control the on / off of the heating element of the gas dryer;

[0042] the inner drum inlet manual thermostat is connected to the detection circuit, and the inner drum inlet manual thermostat is used to control the initial heating temperature of the inner drum inlet of the gas dryer;

[0043] the inner drum inlet thermostat is connected to the detection circuit, and the inner drum inlet thermostat is used to output the inlet temperature of the inner drum of the gas dryer;

[0044] the inner drum outlet thermostat is respectively connected to the gas control circuit and the detection circuit, and the inner drum outlet thermostat is used to output the outlet temperature of the inner drum of the gas dryer.

[0045] The ignition control circuit of the gas dryer provided by the present application realizes the safety and reliability of frequent ignition of the gas dryer through the coordinated action of the control circuit, the ignition circuit, the gas control circuit, and the drive circuit. When the control circuit receives the start signal, it sends the start signal to the ignition circuit and the drive circuit respectively, realizing the synchronous control of the ignition circuit and the drive circuit. The gas control circuit controls the gas valve to open according to the power signal, providing gas for the ignition circuit, and realizing the control of gas supply. The ignition circuit controls the gas dryer to enter the working state according to the start signal and the gas content, ensuring the normal operation of the gas dryer. This circuit design improves the intelligent level and safety performance of the gas dryer, reduces manual operation errors, and provides a more convenient and safe use experience for users. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0047] Figure 1 is the circuit of the ignition control circuit of the gas dryer provided by the present invention Figure 1 ;

[0048] Figure 2 is the circuit of the ignition control circuit of the gas dryer provided by the present invention Figure 2 ;

[0049] Figure 3 is the circuit of the ignition control circuit of the gas dryer provided by the present invention Figure 3 ;

[0050] Figure 4 is the circuit of the ignition control circuit of the gas dryer provided by the present invention Figure 4 ;

[0051] Figure 5 is the circuit of the ignition control circuit of the gas dryer provided by the present invention Figure 5 .

[0052] Through the above-mentioned drawings, specific embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed Embodiments

[0053] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be clearly and completely described below with reference to the drawings in the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without making creative efforts shall fall within the protection scope of the present application.

[0054] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such used data may be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order different from those illustrated or described herein.

[0055] In the embodiments of the present application, words such as "exemplary" or "for example" are used to represent examples, illustrations or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0056] With the progress of technology and the improvement of people's living standards, gas dryers have gradually become an indispensable household appliance product. With its advantages such as high efficiency, energy conservation, and environmental protection, this device has brought great convenience to people's lives. It can dry clothes in a short time, thus saving the time required for drying clothes and improving people's quality of life. In addition, gas dryers also have intelligent control functions, which can automatically adjust the drying time and temperature according to the humidity of the clothes, thus ensuring the best drying effect of the clothes. The appearance of this device not only brings convenience to people's lives, but also makes family life more efficient and comfortable.

[0057] Although gas dryers have been widely used in households, there are still some deficiencies. First of all, the existing gas dryer solutions use relay control, which cannot meet the requirements of millions of ignitions. The lifespan of the relay is limited, and it is prone to failure after long-term use, resulting in a decrease in the reliability of the gas dryer. Secondly, the existing gas module protection measures are not perfect, and safety hazards are likely to occur. Once the gas module fails, it may cause gas leakage and even lead to serious consequences such as fires. Finally, the existing gas dryers cannot alarm quickly. When an abnormal situation occurs, users cannot understand and take measures in time, increasing the safety risk. Therefore, all these situations will result in the inability of gas dryers to ignite frequently.

[0058] Therefore, how to solve the problem that gas dryers cannot ignite frequently, and then avoid the defects of short relay lifespan, large safety hazards, and inability to alarm quickly in gas dryers, so as to improve the reliability of gas dryers and ensure user safety, is the problem to be solved currently.

[0059] In response to the above problems, this application provides an ignition control circuit for a gas dryer. Through the coordinated action of the control circuit, ignition circuit, gas control circuit, and drive circuit, the safety and reliability of frequent ignition of the gas dryer are achieved. When the control circuit receives the start signal, it sends the start signal to the ignition circuit and the drive circuit respectively, realizing synchronous control of the ignition circuit and the drive circuit. The gas control circuit controls the gas valve to open according to the power signal to provide gas for the ignition circuit, realizing the control of gas supply. The ignition circuit controls the gas dryer to enter the working state according to the start signal and gas content, ensuring the normal operation of the gas dryer. This circuit design improves the safety performance of the gas dryer, reduces manual operation errors, and provides users with a more convenient and safe use experience.

[0060] The technical solution of the present application and how the technical solution of the present application solves the above technical problems will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below with reference to the drawings.

[0061] Figure 1 It is the circuit of the ignition control circuit of the gas dryer provided by the present invention Figure 1 . As Figure 1 shown, the ignition control circuit of the gas dryer includes: a control circuit 10, an ignition circuit 11, a gas control circuit 12, and a drive circuit 13.

[0062] Among them, the control circuit is a single-chip microcomputer chip, which is an integrated circuit integrating a central processing unit (CPU), a memory (ROM, RAM), and various peripheral interfaces (such as input / output pins, timers, serial ports, etc.). Generally speaking, the single-chip microcomputer chip is like a small computer, integrating a processor, memory, and various functional modules inside. It is a chip specially designed to control and execute specific tasks and is often used in various electronic devices and embedded systems.

[0063] The control circuit 10 is respectively connected to the ignition circuit 11 and the drive circuit 13. The control circuit 10 is used to receive the start signal of the gas dryer and send the start signal to the ignition circuit 11 and the drive circuit 13 respectively.

[0064] It can be understood that when the control circuit 10 of the gas dryer receives the start signal of the gas dryer, it means that the user currently needs to use the gas dryer to dry clothes. Therefore, the control circuit 10 of the gas dryer will send the start signal it receives to the ignition circuit 11 and the drive circuit 13 so that the ignition circuit and the drive circuit can perform subsequent drying operations.

[0065] Therefore, the control circuit 10 of the gas dryer plays the role of a central processing unit here, receiving the external start signal, and further processing and distributing this signal to drive the operation of the ignition circuit 11 and the drive circuit 13. This design enables the gas dryer to quickly and accurately respond to the start signal and start working.

[0066] The gas control circuit 12 is respectively connected to the ignition circuit 11 and the drive circuit 13. The drive circuit 13 is used to generate a power signal according to the start signal and send the power signal to the gas control circuit 12.

[0067] It can be understood that when the drive circuit 13 of the gas dryer receives the start signal sent by the control circuit 10, the drive circuit 13 generates a power signal according to the current start signal. This power signal is the power source for driving the gas control circuit 12 to work. Therefore, the gas dryer sends the obtained power signal to the gas control circuit 12 of the gas dryer.

[0068] The gas control circuit 12 is used to control the gas valve to open according to the power signal and supply gas to the ignition circuit 11.

[0069] It can be understood that after the gas control circuit 12 of the gas dryer receives the power signal sent by the drive circuit 13, the gas dryer control circuit 12 controls the gas valve of the gas dryer to open according to the current power signal and supplies gas to the ignition circuit 11 of the gas dryer to enable the gas to be ignited.

[0070] The ignition circuit 11 is used to control the gas dryer to enter the working state according to the start signal and the gas content.

[0071] It can be understood that the ignition circuit 11 controls the gas dryer to enter the working state according to the start signal and the gas content. After receiving the start signal, the ignition circuit further processes this signal, considers the current gas content, and then controls the gas dryer to enter the working state according to these factors. This design enables the gas dryer to accurately enter the working state under different gas content conditions and achieve stable and efficient operation.

[0072] The ignition control circuit of the gas dryer provided in this embodiment includes a control circuit, an ignition circuit, a gas control circuit, and a drive circuit. The control circuit is respectively connected to the ignition circuit and the drive circuit. The control circuit is used to receive the start signal of the gas dryer and send the start signal to the ignition circuit and the drive circuit respectively; the gas control circuit is respectively connected to the ignition circuit and the drive circuit. The drive circuit is used to generate a power signal according to the start signal and send the power signal to the gas control circuit; the gas control circuit is used to control the gas valve to open according to the power signal and supply gas to the ignition circuit; the ignition circuit is used to control the gas dryer to enter the working state according to the start signal and the gas content.

[0073] Figure 2 For the circuit of the ignition control circuit of the gas dryer provided by the present invention Figure 2 . On the basis of the above Figure 1 embodiment, the structure of the ignition circuit is described in detail in this embodiment. The ignition circuit 11 includes a triode detection circuit 111, an amplifier detection circuit 112, and a thyristor detection circuit 113.

[0074] Among them, the triode detection circuit 111 is connected to the amplifier detection circuit 112. The triode detection circuit 111 is used to detect the electrical signal of the photosensitive triode, and the amplifier detection circuit 112 is used to detect the electrical signal of the MOS transistor.

[0075] The amplifier detection circuit 112 is connected to the thyristor detection circuit 113. The thyristor detection circuit 113 is used to detect the electrical signal of the thyristor.

[0076] It can be understood that the triode detection circuit controls the voltage of the ignition circuit by detecting the electrical signal of the photosensitive triode to ensure the stability of the voltage, so as to avoid damage to the ignition circuit and the gas dryer caused by overvoltage or undervoltage.

[0077] The amplifier detection circuit 112 is also called the MOS transistor detection circuit, which is mainly used to detect the electrical signal of the MOS transistor. The MOS transistor is a controllable semiconductor switch that can achieve precise on-off control in environments such as high voltage and large current. The amplifier detection circuit is used to obtain these electrical signals, which may contain information such as current and voltage, so as to timely adjust or control the current and voltage in the ignition circuit, thereby ensuring the smooth progress of the ignition process.

[0078] The thyristor detection circuit 113 is mainly used to detect the electrical signal of the thyristor. The thyristor is an important semiconductor switch that can achieve precise on-off control in environments such as high voltage and large current. The function of the thyristor detection circuit is to obtain these electrical signals in order to monitor and adjust the working state of the thyristor, thereby ensuring the safe and stable operation of the ignition circuit.

[0079] For the ignition control circuit of the gas dryer provided in this embodiment, the ignition circuit of the gas dryer includes a triode detection circuit, an amplifier detection circuit, and a thyristor detection circuit. First, the triode detection circuit is responsible for detecting the electrical signal of the photosensitive triode to monitor the voltage of the ignition circuit. Secondly, the amplifier detection circuit is used to detect the electrical signal of the MOS transistor to further control the on-off of the ignition circuit. Finally, the thyristor detection circuit finally monitors and adjusts the entire ignition circuit to ensure the stable operation of the ignition process. This design realizes the precise control of the ignition circuit of the gas dryer, improving the safety and efficiency of the gas dryer.

[0080] Figure 3 For the circuit of the ignition control circuit of the gas dryer provided by the present invention Figure 3 . On the basis of the above Figure 2 embodiment, the structure of the ignition circuit is specifically described in detail in this embodiment.

[0081] As Figure 3As shown, the triode detection circuit 111 includes a first capacitor 20, a first resistor 21, and a triode control circuit. Among them, the triode control circuit is composed of a second resistor 22, a third resistor 23, a power supply voltage 24, and a photosensitive triode 25. The triode control circuit is used to output the electrical signal of the photosensitive triode.

[0082] In the triode detection circuit 111, the first capacitor 20 is respectively connected to the control circuit 10 of the ignition control circuit and the second resistor 22. The second resistor 22 is respectively connected to the third resistor 23 and the photosensitive triode 25. The third resistor is respectively connected to the power supply voltage 24 and the photosensitive triode 25. The photosensitive triode 25 is respectively connected to the power supply voltage 24 and the first resistor 21.

[0083] It can be understood that the first capacitor 20 is respectively connected to the control circuit 10 of the ignition control circuit and the second resistor 22. This connection method can absorb or release charges, thus playing a role in buffering or protecting the circuit. At the same time, the second resistor 22 is connected to the third resistor 23 and the photosensitive triode 25. By controlling the resistance value of the resistor, the size of the circuit can be controlled, and then the state of the photosensitive triode can be affected.

[0084] The third resistor 23 is respectively connected to the power supply voltage 24 and the photosensitive triode 25. This connection can obtain the information of the power supply voltage 24 and transmit this information to the photosensitive triode 25. At the same time, the photosensitive triode 25 is respectively connected to the power supply voltage 24 and the first resistor 21. The photosensitive triode can change its own resistance value according to the light intensity.

[0085] Therefore, through the interaction of components such as the first capacitor 20, the first resistor 21, the second resistor 22, the third resistor 23, the power supply voltage 24, and the photosensitive triode 25, the triode detection circuit can sense the change of light and automatically adjust the output state information according to the light intensity, thus ensuring the stable operation of the triode detection circuit.

[0086] The amplifier detection circuit 112 includes a second capacitor 30, a fourth resistor 31, and an amplifier control circuit. Among them, the amplifier control circuit is composed of a fifth resistor 32, a MOS transistor 33, and a ground terminal 34. The amplifier control circuit is used to output the electrical signal of the MOS transistor.

[0087] The MOS transistor 33 is a voltage-controlled semiconductor device with the advantages of fast switching speed, strong driving ability, and good thermal stability. In the ignition circuit, the MOS transistor is usually used as a switching element. By controlling the on and off of the MOS transistor, the power on and off of the ignition circuit can be controlled.

[0088] In the amplifier detection circuit 112, the second capacitor 30 is respectively connected to the triode detection circuit 111, the fourth resistor 31, and the amplifier control circuit. The fourth resistor 31 is respectively connected to the triode detection circuit 111 and the amplifier control circuit. The amplifier control circuit is connected to the thyristor detection circuit 113. The fifth resistor 32 is respectively connected to the second capacitor 30, the fourth resistor 31, the MOS transistor 33, and the ground terminal 34. The MOS transistor 33 is respectively connected to the thyristor detection circuit 113 and the ground terminal 34.

[0089] It can be understood that the second capacitor 30 is respectively connected to the triode detection circuit 111, the fourth resistor 31, and the amplifier control circuit. This connection enables the signal of the triode detection circuit 111 to be stored or buffered by the second capacitor 30, and at the same time, the signal is transmitted to the amplifier control circuit through the fourth resistor 31.

[0090] The fourth resistor 31 is connected to both the triode detection circuit 111 and the amplifier control circuit, and its function is to guide the circuit through the triode detection circuit 111 and transmit it to the amplifier control circuit.

[0091] The amplifier control circuit is connected to the thyristor detection circuit 113. Since the MOS transistor can receive signals from other circuits (such as the photosensitive triode detection circuit) and control the on-off of the current according to these signals. Therefore, when the gate (control terminal) of the MOS transistor receives a high-level signal, it forms a conductive channel inside, enabling conduction between the source (source terminal) and the drain (drain terminal). In this case, current can flow from the source to the drain through this conductive channel, thus turning on the thyristor detection circuit 112. When the gate of the MOS transistor receives a low-level signal, it cuts off the conductive channel inside, disconnecting the source and the drain. In this case, current cannot flow from the source to the drain, thus turning off the thyristor detection circuit 112.

[0092] Therefore, by connecting the amplifier control circuit to the thyristor detection circuit 113, the MOS transistor can control the on-off of the thyristor detection circuit 112 according to the received signal, thereby achieving precise control of the ignition control circuit. At the same time, due to the switching function of the MOS transistor, it can also effectively prevent damage to the circuit caused by excessive or too small current, improving the safety and stability of the gas dryer.

[0093] The fifth resistor 32 is connected to the second capacitor 30, the fourth resistor 31, the MOS transistor 33, and the ground terminal 34 respectively. This connection method plays a role in voltage division, reducing the voltages of various components in the circuit and protecting them from being damaged by excessive voltages. Specifically, when current passes through the fifth resistor 32, it will generate a certain voltage drop according to Ohm's law, and this voltage drop can reduce the power supply voltage to an appropriate value. Then, this reduced voltage will be transmitted to the MOS transistor 33, enabling each component to operate at a lower voltage, thus playing a role in protecting the circuit.

[0094] The MOS transistor 33 is connected to the thyristor detection circuit 113 and the ground terminal 34 respectively. This connection method plays a role in protecting the circuit and preventing excessive voltages from damaging the circuit.

[0095] The thyristor detection circuit 113 includes a power supply voltage 24, a wind pressure switch 40, and a thyristor control circuit. Among them, the thyristor control circuit includes a sixth resistor 41 and a thyristor 42. The wind pressure switch is used to detect the pressure in the combustion chamber of the gas dryer, and the thyristor control circuit is used to output the electrical signal of the thyristor.

[0096] A thyristor is a high-power semiconductor device with advantages such as large current capacity, high voltage resistance, and fast switching speed. In the ignition circuit, the thyristor is usually used as a load switch. Similar to the MOS transistor, by controlling the conduction and cutoff of the thyristor, the energization and de-energization of the ignition circuit can be controlled.

[0097] In the thyristor detection circuit 113, the power supply voltage 24 is connected to the wind pressure switch 40, the wind pressure switch 40 is connected to the thyristor control circuit, the sixth resistor 41 is connected to the thyristor 42 and the amplifier detection circuit 112 respectively, and the thyristor 42 is connected to the gas control circuit 12.

[0098] It can be understood that the connection between the power supply voltage 24 and the wind pressure switch 40 can supply energy from the power supply voltage to the wind pressure switch. The wind pressure switch 40 is then connected to the thyristor control circuit, and this connection can transmit the electrical signal sensed by the wind pressure switch to the thyristor control circuit, enabling the thyristor control circuit to control the state of the thyristor according to this electrical signal. For example, when the pressure sensed by the wind pressure switch is too low, the thyristor control circuit will turn off the thyristor, thus cutting off the current in the ignition circuit; conversely, when the pressure sensed by the wind pressure switch is too high, the thyristor control circuit will turn on the thyristor, thus connecting the current in the ignition circuit.

[0099] The sixth resistor 41 is respectively connected to the thyristor 42 and the amplifier detection circuit 112. This connection method plays a role in protecting the circuit and preventing excessive voltage from damaging the circuit. The thyristor 42 is connected to the gas control circuit, which can achieve precise control of the gas control circuit, such as controlling parameters such as gas flow and pressure, so as to ensure the normal operation of the gas dryer.

[0100] The thyristor 42 is connected to the gas control circuit 12. This connection method realizes the power supply function of the gas control circuit. When the L-line relay and the N-line main relay in the gas dryer are closed, the zero line passes through the relay, the inner cylinder inlet manual thermostat, the inner cylinder inlet thermostat, and the inner cylinder outlet thermostat to the gas module, so that the gas control circuit has the power supply function and provides gas for the ignition circuit to ensure the successful operation of the ignition circuit.

[0101] During the ignition process, when both the L-line relay and the N-line main relay are closed, the zero line finally reaches the gas control circuit through a series of relays and thermostats. At this time, the gas control circuit has the power supply ability. Therefore, when the air pressure switch 40 is closed, the photosensitive triode 25 is in the switch state through CTRL_PWM. The second capacitor 30 is charged through the first resistor 21 to turn on the MOS tube to the ground, causing the gate of the thyristor 42 to be pulled low and turned on, and then the gas control circuit starts to ignite. At this time, if the inner cylinder NTC detects that the inner cylinder temperature rises, it indicates that the ignition is successful, and then the thyristor is turned off. Then when the temperature at the inner cylinder inlet or the inner cylinder outlet reaches the set temperature value of the thermostat, the thermostat detection circuit will be disconnected, resulting in the disconnection of the zero line of the gas control circuit, and the flameout is completed at this time. Finally, as the temperature of the inner cylinder of the gas dryer and the temperatures at the inner cylinder outlet and inlet decrease, each thermostat closes again, and the thyristor 42 is turned on again to start the next ignition process.

[0102] The ignition control circuit of the gas dryer provided in this embodiment. The ignition circuit of the gas dryer consists of a triode detection circuit, an amplifier detection circuit, and a thyristor detection circuit. When the triode detection circuit starts to work, it can prevent overvoltage or undervoltage conditions from occurring, thereby preventing damage to the gas dryer caused by abnormal voltage. When the amplifier detection circuit starts to operate, it can output the electrical signal of the MOS tube and control the on / off of the ignition circuit, thereby ensuring the normal operation of the gas dryer. When the thyristor detection circuit starts to operate, it is responsible for detecting the pressure in the combustion chamber of the gas dryer and controlling the on / off of the current in the ignition circuit. Therefore, through the mutual connection between the triode detection circuit, the amplifier detection circuit, and the thyristor detection circuit, not only can the operation stability and safety of the gas dryer be effectively improved, but also damage caused by excessive or too small current can be prevented. At the same time, by precisely controlling the on / off and current of the ignition circuit, not only can the normal operation of the gas dryer be ensured, but also the efficiency and lifespan of the gas dryer can be improved.

[0103] Figure 4 For the circuit of the ignition control circuit of the gas dryer provided by the present invention Figure 4 . On the basis of the above Figure 1 embodiment, in this embodiment, the structure of the drive circuit is specifically described in detail. The drive circuit 13 includes a relay control circuit 50 and a detection circuit 60.

[0104] Among them, the relay control circuit 50 includes an L-line relay control circuit 51 and an N-line main relay control circuit 52. The detection circuit includes a thermostat detection circuit 61 and an inner drum NTC detection circuit 62. And the thermostat detection circuit is used to detect the temperature at the outlet and inlet of the inner drum of the gas dryer, and the inner drum NTC detection circuit is used to detect the temperature of the inner drum of the gas dryer.

[0105] In the drive circuit 13, the L-line relay control circuit 51 is connected to the gas control circuit 12; the N-line main relay control circuit 52 is respectively connected to the gas control circuit 12 and the detection circuit 60; the detection circuit 60 is connected to the control circuit 10.

[0106] It can be understood that in the drive circuit 13, the L-line relay control circuit 51 is connected to the gas control circuit 12, which means that the gas supply of the gas dryer can be controlled through the L-line relay control circuit. At the same time, the N-line main relay control circuit 52 is respectively connected to the gas control circuit 12 and the detection circuit 60, indicating that the N-line main relay control circuit can not only control the gas supply but also interact with the detection circuit. The detection circuit is connected to the control circuit 10, which means that when the detection circuit receives the start signal sent by the control circuit, it will control the detection circuit to detect the temperature data at the inlet, outlet, and inside of the inner drum of the gas dryer, so as to control the normal operation of the gas dryer.

[0107] The detection circuit 60 is composed of a thermostat detection circuit 61 and an inner drum NTC detection circuit 62. Since the thermostat detection circuit 61 is mainly used to detect the temperature at the outlet and inlet of the inner drum of the gas dryer, when the temperatures at the inner drum outlet and inlet reach the set temperature values, the thermostat detection circuit 61 will automatically disconnect and issue an alarm command. At the same time, since the inner drum NTC detection circuit 62 is mainly used to detect the temperature reached during the combustion of the inner drum, when the temperature reached during the combustion of the inner drum reaches the set temperature value, the inner drum NTC detection circuit 62 will automatically disconnect and issue an alarm command, thus avoiding damage to the gas dryer and damage to the clothes caused by overheating or overcooling.

[0108] The ignition control circuit of the gas dryer provided in this embodiment controls the gas supply through the relay control circuit, and obtains and feeds back the temperature information to the control system through the detection circuit, so as to achieve precise control of the gas dryer. At the same time, the thermostat, as a temperature protection device, can protect the equipment and avoid damage to the clothes caused by overheating or overcooling. The detection circuit is used to monitor the state of the thermostat in order to issue an alarm or make corresponding adjustments in a timely manner. Such a design can improve the efficiency and safety of the gas dryer.

[0109] Figure 5 For the circuit of the ignition control circuit of the gas dryer provided by the present invention Figure 5 In the above Figure 4 Based on the embodiment, the structure of the relay control circuit 50 is specifically described in detail in this embodiment.

[0110] As Figure 5 shown, the L-line relay control circuit 51 includes an L-line relay 74, and the N-line main relay control circuit 52 includes an N-line main relay 70, an inner drum inlet manual thermostat 71, an inner drum inlet thermostat 72, and an inner drum outlet thermostat 73.

[0111] Among them, the L-line relay is used to control the power on and off of the gas dryer, the N-line main relay is used to control the on and off of the heating element of the gas dryer, the inner drum inlet manual thermostat is used to control the initial heating temperature of the inner drum inlet of the gas dryer, the inner drum inlet thermostat is used to output the inlet temperature of the inner drum of the gas dryer, and the inner drum outlet thermostat is used to output the outlet temperature of the inner drum of the gas dryer.

[0112] In the relay control circuit 50, the L-line relay 74 is connected to the gas control circuit 12, and the N-line main relay 70, the inner drum inlet manual thermostat 71, the inner drum inlet thermostat 72, and the inner drum outlet thermostat 73 are connected in sequence according to the connection order, and the inner drum outlet thermostat 73 is connected to the gas control circuit 12.

[0113] It can be understood that in the relay control circuit, through the connection with the gas control circuit 12, when the L-line relay receives a start signal, it will control the power on and off, thereby controlling the start and stop of the gas dryer.

[0114] The N-line main relay 70 is connected to the inner drum inlet manual thermostat 71, the inner drum inlet thermostat 72, and the inner drum outlet thermostat 73 in sequence to achieve temperature control of different parts, thereby avoiding damage to the gas dryer and ensuring the safe operation of the ignition control circuit of the gas dryer. For example, if the initial temperature value of the inner drum inlet output by the inner drum inlet manual thermostat 71 reaches the set initial temperature value, the detection circuit 60 will control the heating element to disconnect; if not, the heating element will continue to heat. If the heating temperature value of the inner drum inlet output by the inner drum inlet thermostat 72 reaches the set heating temperature, the detection circuit 60 will control the inner drum inlet thermostat to disconnect. If the heating temperature of the inner drum outlet output by the inner drum outlet thermostat 73 reaches the set heating temperature, the detection circuit 60 will control the inner drum outlet thermostat to disconnect.

[0115] The ignition control circuit of the gas dryer provided in this embodiment. The drive circuit includes an L-line relay control circuit and an N-line main relay control circuit. Among them, the L-line relay control circuit includes an L-line relay, and the L-line relay is connected to the gas control circuit. The L-line relay is used to control the power on and off of the gas dryer. The N-line main relay control circuit includes an N-line main relay, an inner drum inlet manual thermostat, an inner drum inlet thermostat, and an inner drum outlet thermostat. And the N-line main relay, the inner drum inlet manual thermostat, the inner drum inlet thermostat, and the inner drum outlet thermostat are connected in sequence according to the connection order. The N-line main relay is used to control the on and off of the heating element of the gas dryer; the detection circuit is respectively connected to the inner drum inlet manual thermostat, the inner drum inlet thermostat, and the inner drum outlet thermostat. Therefore, through the cooperation of the L-line relay and the N-line main relay, the drive circuit realizes the precise control of the power supply and the heating element of the gas dryer; at the same time, the detection circuit monitors the temperature at the inlet and outlet of the inner drum in real time and feeds the data back to the control circuit to realize the precise adjustment of the temperature and the stable operation of the equipment. Such a design can improve the efficiency and safety of the equipment.

[0116] So far, the technical solutions of the present application have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An ignition control circuit for a gas dryer, characterized in that, it includes: a control circuit, an ignition circuit, a gas control circuit, and a drive circuit; The control circuit is respectively connected to the ignition circuit and the drive circuit. The control circuit is used to receive the start signal of the gas dryer and send the start signal to the ignition circuit and the drive circuit respectively; The gas control circuit is respectively connected to the ignition circuit and the drive circuit. The drive circuit is used to generate a power signal according to the start signal and send the power signal to the gas control circuit; The gas control circuit is used to control the gas valve to open according to the power signal and supply gas to the ignition circuit; The ignition circuit is used to control the gas dryer to enter the working state according to the start signal and the gas content.

2. The ignition control circuit for a gas dryer according to claim 1, characterized in that, the ignition circuit includes a triode detection circuit, an amplifier detection circuit, and a thyristor detection circuit, wherein, the triode detection circuit is connected to the amplifier detection circuit. The triode detection circuit is used to detect the electrical signal of the photosensitive triode, and the amplifier detection circuit is used to detect the electrical signal of the MOS tube; The amplifier detection circuit is connected to the thyristor detection circuit. The thyristor detection circuit is used to detect the electrical signal of the thyristor.

3. The ignition control circuit for a gas dryer according to claim 2, characterized in that, the triode detection circuit includes a first capacitor, a first resistor, and a triode control circuit, wherein the triode control circuit includes a second resistor, a third resistor, a power supply voltage, and a photosensitive triode; The first capacitor is respectively connected to the control circuit 1 and the triode control circuit. The triode control circuit is used to output the electrical signal of the photosensitive triode; The triode control circuit is connected to the first resistor.

4. The ignition control circuit for a gas dryer according to claim 3, characterized in that, it further includes: the second resistor is respectively connected to the first capacitor, the third resistor, and the photosensitive triode; the third resistor is respectively connected to the power supply voltage and the photosensitive triode; the photosensitive triode is respectively connected to the power supply voltage and the first resistor.

5. The ignition control circuit for a gas dryer according to claim 2, characterized in that, the amplifier detection circuit includes a second capacitor, a fourth resistor, and an amplifier control circuit, wherein the amplifier control circuit includes a fifth resistor, a MOS tube, and a ground terminal; The second capacitor is respectively connected to the triode detection circuit, the fourth resistor, and the amplifier control circuit. The amplifier control circuit is used to output the electrical signal of the MOS tube; The fourth resistor is respectively connected to the triode detection circuit and the amplifier control circuit; The amplifier control circuit is connected to the thyristor detection circuit.

6. The ignition control circuit for a gas dryer according to claim 5, characterized in that, it further includes: The fifth resistor is connected to the second capacitor, the fourth resistor, the MOS transistor, and the ground terminal respectively; The MOS transistor is connected to the thyristor detection circuit and the ground terminal respectively.

7. The ignition control circuit of the gas dryer according to claim 2, characterized in that the thyristor detection circuit includes the power supply voltage, a wind pressure switch, and a thyristor control circuit, wherein the thyristor control circuit includes a sixth resistor and a thyristor; the power supply voltage is connected to the wind pressure switch, and the wind pressure switch is used to detect the pressure in the combustion chamber of the gas dryer; the wind pressure switch is connected to the thyristor control circuit, and the thyristor control circuit is used to output an electrical signal of the thyristor; the sixth resistor is connected to the thyristor and the amplifier detection circuit respectively; the thyristor is connected to the gas control circuit.

8. The ignition control circuit of the gas dryer according to claim 1, characterized in that the drive circuit includes a relay control circuit and a detection circuit, wherein the relay control circuit includes an L-line relay control circuit and an N-line main relay control circuit; the detection circuit includes a thermostat detection circuit and an inner drum NTC detection circuit. The thermostat detection circuit is used to detect the temperature at the outlet and the inlet of the inner drum of the gas dryer, and the inner drum NTC detection circuit is used to detect the temperature of the inner drum of the gas dryer; the L-line relay control circuit is connected to the gas control circuit; the N-line main relay control circuit is connected to the gas control circuit and the detection circuit respectively; the detection circuit is connected to the control circuit.

9. The ignition control circuit of the gas dryer according to claim 8, characterized in that the L-line relay control circuit includes an L-line relay, wherein the L-line relay is connected to the gas control circuit, and the L-line relay is used to control the on / off of the power supply of the gas dryer.

10. The ignition control circuit of the gas dryer according to claim 8, characterized in that the N-line main relay control circuit includes an N-line main relay, a manual inner drum inlet thermostat, an inner drum inlet thermostat, and an inner drum outlet thermostat, wherein the N-line main relay, the manual inner drum inlet thermostat, the inner drum inlet thermostat, and the inner drum outlet thermostat are connected in sequence according to the connection order, and the N-line main relay is used to control the on / off of the heating element of the gas dryer; the detection circuit is connected to the manual inner drum inlet thermostat, the inner drum inlet thermostat, and the inner drum outlet thermostat respectively.

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