A wind pressure stabilizing circuit for a gas heating stove and a heating stove water heater thereof

Abstract

The application discloses a kind of wind pressure stabilizing circuit of gas heating stove, including control module, thyristor circuit, zero-crossing detection circuit, fan speed feedback circuit and wind pressure detection circuit, control module is respectively connected with the thyristor circuit, zero-crossing detection circuit, fan speed feedback circuit and wind pressure detection circuit, obtains wind pressure detection feedback signal, fan speed feedback signal and the zero point position of alternating current, the conduction angle size of control thyristor circuit, real-time regulation fan speed.The application obtains wind pressure detection feedback signal, fan speed feedback signal and the zero point position of alternating current by control module, controls thyristor circuit to switch to different conduction angle, adjusts the speed of fan, stabilizes the wind pressure in heating stove combustion chamber, avoids single speed or only adjusts fan speed, so that the defect that combustion is unstable is avoided, guarantees the stable combustion of heating stove water heater, improves work efficiency.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of water heater, in particular, relates to a kind of wind pressure stabilizing circuit of gas heating stove and heating stove water heater thereof. BACKGROUND

[0002] Traditional heating stove water heater is directly driven by mains, and the speed of AC fan cannot be adjusted. The combustion of heating stove is determined by gas and air, and the stability of gas is determined by control valve, while the amount of air is ensured by fan. Currently, fan in heating stove product is divided into two categories: DC fan and AC fan. The speed of DC fan can be controlled by frequency conversion design, which makes combustion stable. However, the combustion will be unstable when the fan is in wind pipe or small load state. The power supply of DC fan is generally DC 36V, which is generated by power supply scheme from mains, and added with frequency conversion circuit. The cost of DC fan scheme is relatively high.

[0003] Chinese patent with application number CN203014734U discloses an AC fan speed regulation circuit device for gas water heater, which comprises a controller, single-phase AC PG click, silicon controlled switch circuit, motor speed feedback circuit and zero-crossing detection circuit. The silicon controlled switch circuit, motor speed feedback circuit and zero-crossing detection circuit are connected with the controller. The purpose of the utility model is to control the electrical angle between the silicon controlled switch circuit connected with single-phase AC PG motor and AC zero-crossing, to realize stepless speed regulation of single-phase AC PG motor, to achieve good matching condition of gas and air, and to solve the problems of combustion instability and flameout of water heater when the air volume is too large or too small. The stability of combustion needs to ensure stable air pressure in combustion chamber. The device cannot ensure the stability of combustion by adjusting the speed of fan only, and combustion instability will still occur in different geographical locations or under different wind pipe lengths.

[0004] Therefore, the present application is proposed. SUMMARY

[0005] The present application solves the technical problem of overcoming the shortcomings of prior art, and provides a wind pressure stabilizing circuit for gas heating stove. The fan speed feedback circuit is arranged on the fan, and cooperates with the wind pressure detection circuit, silicon controlled circuit and zero-crossing detection circuit to detect the wind pressure in the combustion chamber of heating stove, so as to control the conduction angle of silicon controlled circuit by obtaining the zero point position of zero-crossing detection circuit, to make the fan have different speeds, to ensure stable air pressure in the combustion chamber, to solve the problem of unstable air pressure in the combustion chamber of gas heating water heater, and to make the heating stove achieve the purpose of stable combustion.

[0006] To solve the above technical problems, the basic idea of the technical scheme of the present application is: a wind pressure stabilizing circuit of a gas heating stove, comprising,

[0007] A silicon controlled circuit is used to adjust the rotating speed of the fan.

[0008] A zero-crossing detection circuit is used to detect the zero point position of the positive half cycle and the negative half cycle of the alternating current.

[0009] A fan rotating speed feedback circuit is used to detect the rotating speed of the fan.

[0010] A wind pressure detection circuit is used to detect the wind pressure in the combustion chamber of the heating stove.

[0011] A control module is connected with the silicon controlled circuit, the zero-crossing detection circuit, the fan rotating speed feedback circuit and the wind pressure detection circuit respectively, obtains the wind pressure detection signal, the fan rotating speed feedback signal and the zero point position of the alternating current, controls the conduction angle of the silicon controlled circuit, and adjusts the rotating speed of the fan in real time.

[0012] Further, the wind pressure detection circuit comprises,

[0013] A wind pressure sensor is used to detect the wind pressure in the combustion chamber of the heating stove.

[0014] A switch control circuit is connected with the wind pressure sensor, is used to turn on or turn off the wind pressure detection circuit, controls the wind pressure sensor to be turned off at low level and turned on at high level.

[0015] A filter circuit is connected with the control module and the switch control circuit respectively, is used to filter out the interference signals in the transmission signals of the switch control circuit, and transmits to the control module.

[0016] Further, the switch control circuit comprises a resistor R75, the resistor R75 is connected with the wind pressure sensor CN23, the resistor R75 is connected in series with a transistor N24 and a resistor R76, the base and the emitter of the transistor N24 are connected in parallel with the resistor R76, and the emitter of the transistor is connected with the ground.

[0017] The filter circuit comprises a resistor R199, the resistor R199 is connected in series with the collector of the transistor N24, the resistor R199 is connected in parallel with a resistor R185, the resistor R185 is connected with a power supply 5V, the resistor R199 is connected in series with a capacitor C81, the capacitor C81 is connected with the ground, and the resistor R199 is connected with the control module.

[0018] Further, the fan rotating speed feedback circuit comprises,

[0019] A speed sensor is used to detect the rotating speed of the fan.

[0020] A switch control circuit is connected with the speed sensor, is used to turn on or turn off the fan rotating speed feedback circuit, controls the speed sensor to be turned off at low level and turned on at high level.

[0021] Filter circuit, connected with control module and switch control circuit respectively, used for filtering interference signal in transmission signal of switch control circuit and transmitting to control module;

[0022] Preferably, the speed sensor is part of a wind pressure sensor.

[0023] Further, the switch control circuit comprises a resistor R191 connected with the wind pressure sensor CN23, the resistor R191 is connected in series with a transistor N23 and a resistor R190, the base of the transistor N23 is connected in parallel with the resistor R190 of the transmitter, and the emitter of the transistor is grounded.

[0024] The filter circuit comprises a resistor R178 connected in series with the collector of a transistor N24, the resistor R178 is connected in parallel with a resistor R143 connected with a power supply 5V, the resistor R178 is connected in series with a capacitor C63 grounded, and the resistor R178 is connected with the control module.

[0025] Further, the speed sensor is part of a wind pressure sensor, which can detect the speed of the fan and the wind pressure in the combustion chamber of the heating furnace at the same time.

[0026] The pin 1 of the wind pressure sensor CN23 is connected with a power supply 5V, the pin 4 is grounded, and the pin 5 is connected with a power supply 12V.

[0027] Further, the thyristor circuit comprises,

[0028] The switch control circuit is connected with the control module, used for controlling the thyristor circuit to be turned off at low level and turned on at high level.

[0029] The bidirectional thyristor trigger circuit is connected with the switch control circuit and the motor respectively, used for obtaining the control signal of the switch control circuit, changing the conduction angle of the bidirectional thyristor, controlling the motor to switch different output powers, and realizing real-time speed regulation of the motor.

[0030] Further, the bidirectional thyristor trigger circuit comprises a photoelectric coupler IC12, one end of the photoelectric coupler IC12 is connected with a resistor R183 in parallel, the resistor R183 is connected with a power supply 12V, the other end of the photoelectric coupler IC12 is connected with a resistor R184 and a bidirectional thyristor Q1 in series, the resistor R184 is connected with the bidirectional thyristor Q1 in series, the bidirectional thyristor Q1 is connected with a capacitor C61 and a resistor R179 in parallel, the capacitor C61 is connected with the resistor R179 in series, the resistor R184 is connected with a resistor R186 and a resistor R182 in series, the resistor R186 and the resistor R182 are connected with the bidirectional thyristor Q1 in parallel, the resistor R179 and the resistor R182 are connected with a pin 1 of an electric connector CN20, a pin 6 of the photoelectric coupler IC12 and a pin 3 of the electric connector CN20 are connected with the zero-crossing detection circuit.

[0031] The switch control circuit comprises a resistor R189, the resistor R189 is connected with a triode N9 and a resistor R192 in series, the base and the emitter of the triode N9 are connected with the resistor R192 in parallel, the emitter of the triode N9 is connected with the resistor R1192, the collector of the triode N9 is connected with a resistor R188 in series, one end of the resistor R188 is connected with the resistor R183 and the photoelectric coupler IC12.

[0032] Further, the zero-crossing detection circuit comprises a resistor R193, a resistor R197, one end of the resistor R193 is connected with a pin 6 of a photoelectric coupler IC12, the other end of the resistor R193 is connected with a resistor R194 in series, the resistor R194 is connected with a diode D9 in series, one end of the resistor R197 is connected with a pin 3 of an electric connector CN20, the resistor R197 is connected with a resistor R198 in series, the resistor R198 is connected with a cathode of a photoelectric coupler IC13, the diode D9 is connected with an anode of the photoelectric coupler IC13, the anode and the cathode of the photoelectric coupler IC13 are connected with a diode D25 in parallel, the emitter of the photoelectric coupler IC13 is connected with a triode P13 in series, the collector of the photoelectric coupler IC13 is connected with a resistor R196 in series, the photoelectric coupler IC13 is connected with the resistor R196 in series, the resistor R196 is connected with the collector of the triode P13, the emitter of the triode P13 is connected with a power supply 5V, the resistor R196 is connected with the resistor R195 in series, the resistor R195 is connected with a capacitor C80 in parallel, the capacitor C80 is connected with the ground, and the resistor R195 is connected with the zero-crossing detection end.

[0033] A heating stove water heater comprises the wind pressure stabilizing circuit of any one of the above-described gas heating stoves.

[0034] Compared with the prior art, the technical scheme has the following beneficial effects.

[0035] (1) The application sets the fan speed feedback circuit and the wind pressure detection circuit, transmits the fan speed signal and the pulse signal of the wind pressure sensor to the control module, adjusts the speed of the fan by detecting the wind pressure in the combustion chamber of the heating furnace, ensures the appropriate wind pressure, and makes the heating furnace reach the purpose of stable combustion.

[0036] (2) The application sets the thyristor circuit to control the conduction angle of the mains, realizes the speed regulation of the fan, changes the disadvantage that the fan has only one speed, realizes the regulation and control of the fan speed with the wind pressure detection circuit and the fan speed feedback circuit, prevents the wind pressure in the heating furnace from being affected by the smoke pipe or the external wind pressure, makes the combustion of the heating furnace stable, improves the efficiency of the water heater, and changes the disadvantage of the single-gear fan.

[0037] (3) The application sets the zero-crossing detection circuit connected with the thyristor circuit to detect the zero-crossing position of the waveform of the alternating current, provide the reference point of the motor voltage, detects the waveform generated by the Hall element in the motor speed feedback circuit, and outputs to the control module to achieve the speed measurement effect, facilitates the speed regulation of the motor according to the needs of the user, has the simple structure and is convenient to control, solves the problem that the unstable wind pressure of the heating furnace causes unstable combustion, realizes the controllable wind pressure, ensures stable combustion, and improves the working efficiency of the water heater.

[0038] (4) The application realizes the effect of the direct-current fan by using the alternating-current fan, the cost of the alternating-current fan is lower than that of the direct-current fan, the cost of the alternating-current control frequency conversion scheme is lower than that of the direct-current frequency conversion scheme, and the cost of the direct-current power supply scheme is saved, so the cost is reduced from the perspective of cost.

[0039] The specific embodiments of the application will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0040] The accompanying drawings are part of the present application and serve to provide a further understanding of the present application, the illustrative embodiments of the present application and the description thereof serve to explain the present application, but do not constitute an improper limitation on the present application. Obviously, the accompanying drawings in the following description are only some embodiments, and other drawings can be obtained by those skilled in the art without creating laborious work. In the drawings:

[0041] Figure 1 is the thyristor circuit circuit diagram of the present application;

[0042] Figure 2 is the zero-crossing detection circuit circuit diagram of the present application;

[0043] Figure 3 is the fan speed feedback circuit circuit diagram of the present application;

[0044] Figure 4 is the wind pressure detection circuit circuit diagram of the present application;

[0045] Figure 5 is a schematic diagram of a wind pressure sensor of the present application;

[0046] Figure 6 is a structural schematic diagram of the present application.

[0047] It should be noted that these drawings and written descriptions are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments will be described clearly and completely below with reference to the drawings of the embodiments of the present application. The following embodiments are used to illustrate the present application, but not to limit the scope of the present application.

[0049] In the description of the present application, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0050] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0051] As shown in Figures 1 to 6 The wind pressure stabilizing circuit of the gas heating stove comprises a control module, a silicon controlled circuit, a zero-crossing detection circuit, a fan speed feedback circuit and a wind pressure detection circuit.

[0052] The silicon controlled circuit is used to adjust the speed of the fan.

[0053] The zero-crossing detection circuit is used to detect the zero point position of the positive half cycle and the negative half axis of the alternating current.

[0054] The fan speed feedback circuit is used to detect the speed of the fan.

[0055] The wind pressure detection circuit is used to detect the wind pressure in the combustion chamber of the heating stove.

[0056] The control module is connected with the silicon controlled circuit, the zero-crossing detection circuit, the fan speed feedback circuit and the wind pressure detection circuit respectively, obtains the wind pressure detection feedback signal, the fan speed feedback signal and the zero point position of the alternating current, controls the conduction angle of the silicon controlled circuit, and adjusts the fan speed in real time.

[0057] The wind pressure detection circuit detects the wind pressure pulse signal in the combustion chamber of the heating furnace, and the fan speed feedback circuit feeds back the fan speed signal to the control module.

[0058] Further, the wind pressure detection circuit comprises a switch control circuit, a filter circuit and a wind pressure sensor CN23.

[0059] The wind pressure sensor CN23 is used for detecting the wind pressure in the combustion chamber of the heating furnace.

[0060] The switch control circuit is connected with the control module, and is used for controlling the on or off of the wind pressure detection circuit.

[0061] The filter circuit is connected with the control module and the switch control circuit respectively, and is used for filtering the interference signal in the transmission signal of the switch control circuit and transmitting the signal to the control module.

[0062] The control module obtains the wind pressure pulse signal of the wind pressure detection circuit, sends a control signal to the silicon controlled circuit, changes the conduction angle of the double-directional silicon controlled, controls the fan to switch different output powers, and changes the fan speed in real time.

[0063] The filter circuit is added in the wind pressure detection circuit, interference signals in the detection signal of the wind pressure sensor CN23 are prevented, self-excitation of the zero point is prevented, and the wind pressure detection signal can be better output.

[0064] Further, the switch control circuit comprises a resistor R75, the resistor R75 is connected with the wind pressure sensor CN23, the resistor R75 is connected with a triode N24 and a resistor R76 in series, the base and the emitter of the triode N24 are connected with the resistor R76 in parallel, and the emitter of the triode is connected with the ground.

[0065] The filter circuit comprises a resistor R199, the resistor R199 is connected in series with the collector of a transistor N24, the resistor R199 is connected in parallel with a resistor R185, the resistor R185 is connected with a power supply 5V, the resistor R199 is connected in series with a capacitor C81, the capacitor C81 is grounded, and the resistor R199 is connected with a control module.

[0066] Further, the fan speed feedback circuit comprises a switch control circuit, a filter circuit and a speed sensor.

[0067] The speed sensor is used for detecting the fan speed.

[0068] The switch control circuit is connected with the speed sensor and is used for controlling the fan speed feedback circuit to be disconnected at a low level and to be turned on at a high level.

[0069] The filter circuit is connected with the control module and the switch control circuit respectively and is used for filtering out interference signals in the transmission signals of the switch control circuit and transmitting the signals to the control module.

[0070] Preferably, the speed sensor is a wind pressure sensor CN23.

[0071] By using one wind pressure sensor to detect the fan feedback circuit and the wind pressure detection circuit, the cost is saved and the external interference is reduced.

[0072] The switch control circuit comprises a resistor R191, the resistor R191 is connected with the wind pressure sensor CN23, the resistor R191 is connected in series with a transistor N23 and a resistor R190, the base of the transistor N23 is connected in parallel with the resistor R190, and the emitter of the transistor is grounded.

[0073] The filter circuit comprises a resistor R178, the resistor R178 is connected in series with the collector of a transistor N24, the resistor R178 is connected in parallel with a resistor R143, the resistor R143 is connected with a power supply 5V, the resistor R178 is connected in series with a capacitor C63, the capacitor C63 is grounded, and the resistor R178 is connected with a control module.

[0074] As shown in Figures 3 to 5 The fan speed feedback circuit is connected with the fan through the wind pressure sensor CN23, the fan speed signal and the wind pressure pulse signal are fed back to the control module through the transistor N23 and the transistor N24, the wind pressure in the combustion chamber of the heating furnace and the speed of the motor are detected in real time, the power of the fan is increased or reduced by the controllable silicon circuit, the wind pressure is controlled, and the stable combustion of the heating furnace is ensured.

[0075] The model of the transistor N23 and the transistor N24 is 2SC2412.

[0076] The triode N23 and the triode N24 in the fan rotating speed feedback circuit and the wind pressure detection circuit stabilize and amplify the fan rotating speed signal and the wind pressure sensor pulse signal, so as to avoid signal distortion.

[0077] Further, the speed sensor is part of the wind pressure sensor CN23, which can detect the fan rotating speed and the wind pressure in the combustion chamber of the heating furnace simultaneously.

[0078] The pin 1 of the wind pressure sensor CN23 is connected to the power supply 5V, the pin 4 is grounded, and the pin 5 is connected to the power supply 12V.

[0079] As shown in Figures 3 to 5 The pins 2 and 3 of the wind pressure sensor CN23 are connected to the wind pressure detection circuit and the fan rotating speed feedback circuit respectively, and the wind pressure pulse signal and the fan rotating speed feedback signal in the combustion chamber of the heating furnace are sent to the control module through the detection of the wind pressure sensor CN23, and the control module controls the conduction angle of the thyristor circuit by obtaining the wind pressure pulse signal and the fan rotating speed signal, so as to change the rotating speed of the fan.

[0080] Further, the thyristor circuit includes a bidirectional thyristor trigger circuit and a switch control circuit.

[0081] The switch control circuit is connected to the control module for controlling the low-level disconnection and the high-level conduction of the thyristor circuit.

[0082] The bidirectional thyristor trigger circuit is connected to the switch control circuit and the motor respectively, for controlling the output power of the motor to realize the real-time speed regulation of the motor.

[0083] When the conduction angle of the bidirectional thyristor Q1 in the bidirectional thyristor trigger circuit is equal to 180°, the motor terminal voltage waveform is a sine wave, i.e. full conduction state; when the conduction angle is less than 180°, i.e. non-full conduction state, the voltage effective value is reduced; the smaller the conduction angle, the fewer the conduction states, and the smaller the voltage effective value, the smaller the generated magnetic field, and the lower the rotating speed of the motor, so that the rotating speed of the motor can be continuously adjusted.

[0084] Further, the bidirectional thyristor trigger circuit includes a photoelectric coupler IC12, one end of the photoelectric coupler IC12 is connected in parallel with a resistor R183, the resistor R183 is connected with a power supply 12V, the other end of the photoelectric coupler IC12 is connected in series with a resistor R184 and a bidirectional thyristor Q1, the resistor R184 is connected in series with the bidirectional thyristor Q1, the bidirectional thyristor Q1 is connected in parallel with a capacitor C61 and a resistor R179, the capacitor C61 is connected in series with the resistor R179, the resistor R184 is connected in series with a resistor R186 and a resistor R182, the resistor R186 and the resistor R182 are connected in parallel with the bidirectional thyristor Q1, the resistor R179 and the resistor R182 are connected with a pin 1 of an electric connector CN20, a pin 6 of the photoelectric coupler IC12 and a pin 3 of the electric connector CN20 are connected with a zero-crossing detection circuit.

[0085] The switch control circuit includes a resistor R189, one end of the resistor R189 is connected with a fan, the resistor R189 is connected in series with a triode N9 and a resistor R192, the base and the emitter of the triode N9 are connected in parallel with the resistor R192, the emitter of the triode N9 is connected with the resistor R1192, the collector of the triode N9 is connected in series with a resistor R188, one end of the resistor R188 is connected in series with the resistor R183 and the photoelectric coupler IC12.

[0086] As shown in Figure 1 , by setting the thyristor circuit, the speed of the fan of the gas heating water heater is adjusted, the control effect of the single gear of the fan is changed, the real-time regulation and control of the fan speed is realized through the motor speed feedback circuit, the wind pressure in the combustion chamber is prevented from being affected by the fan speed, the smoke pipe or the external wind pressure, the wind pressure in the combustion chamber is affected, the wind pressure of different combustion chambers corresponds to different combustion flames, the inaccuracy of the separate speed adjustment is solved, and the working efficiency of the water heater is improved.

[0087] The model of the photoelectric coupler IC12 is MOC3051M, the model of the bidirectional thyristor is T830, and the model of the triode N9 is 2SC2412.

[0088] Further, the zero-crossing detection circuit comprises a resistor R193, a resistor R197, one end of the resistor R193 is connected with a pin 6 of a photoelectric coupler IC12, the other end of the resistor R193 is connected with a resistor R194 in series, the resistor R194 is connected with a diode D9 in series, one end of the resistor R197 is connected with a pin 3 of an electric connector CN20, the resistor R197 is connected with a resistor R198 in series, the resistor R198 is connected with a cathode of a photoelectric coupler IC13, the diode D9 is connected with an anode of the photoelectric coupler IC13, the anode and the cathode of the photoelectric coupler IC13 are connected with a diode D25 in parallel, an emitter of the photoelectric coupler IC13 is connected with a transistor P13 in series, a collector of the photoelectric coupler IC13 is connected with a resistor R196 in parallel, the photoelectric coupler IC13 is connected with the resistor R196 at ground, the other end of the resistor R196 is connected with a collector of the transistor P13, an emitter of the transistor P13 is connected with a power supply 5V, the resistor R196 is connected with the resistor R195 at the connection of the transistor P13, the resistor R195 is connected with a capacitor C80 in parallel, the capacitor C80 is connected at ground, and the resistor R195 is connected with a zero-crossing detection end.

[0089] As shown in Figures 1 to 2 The present application provides a zero-crossing detection circuit and a silicon controlled circuit, when the fan is controlled, the zero-crossing detection circuit is used to detect the zero-crossing point of the alternating current, and provide a reference point of the control voltage, the control module obtains the zero-crossing point of the alternating current, and controls the silicon controlled rectifier Q1 of the silicon controlled rectifier trigger circuit to be turned on, so that the silicon controlled rectifier Q1 can be turned on at any angle of the alternating current, the power of the fan is continuously adjustable, the structure is simple and convenient to control, when the wind pressure in the combustion chamber of the heating furnace is detected, the speed of the motor can be adjusted in time, the wind pressure is stable, the combustion of the heating furnace is stable, the working efficiency of the water heater is improved, and the user experience is improved.

[0090] Further, the photoelectric coupler IC13 is PC817A-SOP4, and the digital transistor P13 is DTA143.

[0091] The present application also provides a heating furnace water heater with the wind pressure stabilizing circuit of any one of the heating furnaces.

[0092] The application protects a kind of wind pressure stabilizing circuit of gas heating stove and its heating stove water heater, by setting wind pressure detection circuit on heating stove water heater, according to the wind pressure in the heating stove combustion chamber and the fan speed detected by wind pressure sensor CN23, through the fan speed feedback signal and the wind pressure pulse signal, the conduction angle between the controllable silicon circuit connected with the fan and the zero-crossing detection circuit is controlled, the power of the fan is increased or reduced, the wind pressure in the heating stove combustion chamber is detected in real time, the wind pressure is controlled, the single speed or only adjusting the fan speed is avoided, the disadvantage of unstable combustion is avoided, the stable combustion of heating stove water heater is ensured, and the working efficiency is improved.

[0093] The above is only the preferred embodiment of the present application, not any form of the present application is limited, although the present application has been disclosed as above, however, not to limit the present application, any skilled person in the art of the patent within the scope of the present application technical solution, when can use the above-mentioned technical content of the hint to make some changes or modification as equivalent variation of equivalent embodiment, the implementation scheme in the above embodiment can be further combined or replaced, as long as it does not deviate from the technical solution of the present application, according to the technical essence of the present application, any simple modification, equivalent variation and modification of the above embodiment, still belongs to the scope of the present application.

Claims

1. A wind pressure stabilizing circuit for a gas heating stove, characterized by: The application relates to a heating furnace control system. The controllable silicon circuit is used for regulating the rotating speed of the fan; The zero-crossing detection circuit is used for detecting the zero point position of the positive half cycle and the negative half cycle of the alternating current; The fan rotating speed feedback circuit is used for detecting the rotating speed of the fan; The wind pressure detection circuit is used for detecting the wind pressure in the combustion chamber of the heating furnace; The control module is connected with the controllable silicon circuit, the zero-crossing detection circuit, the fan rotating speed feedback circuit and the wind pressure detection circuit respectively, obtains the wind pressure detection feedback signal, the fan rotating speed feedback signal and the zero point position of the alternating current, controls the conduction angle size of the controllable silicon circuit and adjusts the rotating speed of the fan in real time; The wind pressure detection circuit comprises a wind pressure sensor CN23, and the wind pressure sensor is used for detecting the wind pressure in the combustion chamber of the heating furnace and detecting the rotating speed of the fan simultaneously. Pin 1 of the wind pressure sensor CN23 is connected with a 5V power supply, pin 4 is grounded, pin 5 is connected with a 12V power supply, and pin 2 and pin 3 of the wind pressure sensor CN23 are connected with the wind pressure detection circuit and the fan rotating speed feedback circuit respectively.

2. The wind pressure stabilizing circuit of a gas heating stove according to claim 1, wherein: The wind pressure detection circuit comprises, The switch control circuit is connected with the wind pressure sensor and is used for controlling the on or off of the wind pressure detection circuit, controlling the low-level off and the high-level on of the wind pressure sensor; The filter circuit is connected with the control module and the switch control circuit respectively and is used for filtering the interference signals in the transmission signals of the switch control circuit and transmitting the signals to the control module.

3. A wind pressure stabilizing circuit for a gas heating stove according to claim 2, wherein: The switch control circuit comprises a resistor R75, the resistor R75 is connected with the wind pressure sensor CN23, the resistor R75 is connected in series with a triode N24 and a resistor R76, the base and the emitter of the triode N24 are connected in parallel with the resistor R76, and the emitter of the triode is grounded; The filter circuit comprises a resistor R199, the resistor R199 is connected in series with the collector of the triode N24, the resistor R199 is connected in parallel with a resistor R185, the resistor R185 is connected with a 5V power supply, the resistor R199 is connected in series with a capacitor C81, the capacitor C81 is grounded, and the resistor R199 is connected with the control module.

4. The wind pressure stabilizing circuit of a gas heating stove according to claim 1, wherein: The fan rotating speed feedback circuit comprises, The speed sensor is used for detecting the rotating speed of the fan; The switch control circuit is connected with the speed sensor and is used for controlling the on or off of the fan rotating speed feedback circuit, controlling the low-level off and the high-level on of the speed sensor; The filter circuit is connected with the control module and the switch control circuit respectively and is used for filtering the interference signals in the transmission signals of the switch control circuit and transmitting the signals to the control module; The speed sensor is part of the wind pressure sensor.

5. A wind pressure stabilizing circuit for a gas heating stove according to claim 4, wherein: The switch control circuit comprises a resistor R191, the resistor R191 is connected with the wind pressure sensor CN23, the resistor R191 is connected in series with a triode N23 and a resistor R190, the base and the emitter of the triode N23 are connected in parallel with the resistor R190, and the emitter of the triode is grounded; The filter circuit comprises a resistor R178, the resistor R178 is connected in series with the collector of the triode N24, the resistor R178 is connected in parallel with a resistor R143, the resistor R143 is connected with a 5V power supply, the resistor R178 is connected in series with a capacitor C63, the capacitor C63 is grounded, and the resistor R178 is connected with the control module.

6. The wind pressure stabilizing circuit of a gas heating stove according to claim 1, wherein: The controllable silicon circuit comprises, The switch control circuit is connected with the control module and used for controlling the low-level disconnection and high-level conduction of the silicon controlled rectifier circuit. The bidirectional silicon controlled trigger circuit is connected with the switch control circuit and the motor respectively, used for obtaining the control signal of the switch control circuit, changing the conduction angle of the bidirectional silicon controlled, controlling the motor to switch different output powers, and realizing the real-time speed regulation of the motor.

7. A wind pressure stabilizing circuit for a gas heating stove according to claim 6, wherein: The bidirectional silicon controlled trigger circuit includes a photoelectric coupler IC12, one end of the photoelectric coupler IC12 is connected with a resistor R183 in parallel, the resistor R183 is connected with a power supply 12V, the other end of the photoelectric coupler IC12 is connected with a resistor R184 and a bidirectional silicon controlled Q1 in series, the resistor R184 is connected with the bidirectional silicon controlled Q1 in series, the bidirectional silicon controlled Q1 is connected with a capacitor C61 and a resistor R179 in parallel, the capacitor C61 is connected with the resistor R179 in series, the resistor R184 is connected with a resistor R186 and a resistor R182 in series, the resistor R186 and the resistor R182 are connected with the bidirectional silicon controlled Q1 in parallel, the connection between the resistor R179 and the resistor R182 is connected with a pin 1 of an electric connector CN20, a pin 6 of the photoelectric coupler IC12 and a pin 3 of the electric connector CN20 are connected with a zero-crossing detection circuit. The switch control circuit includes a resistor R189, one end of the resistor R189 is connected with the control module, the other end of the resistor R189 is connected with a triode N9 and a resistor R192 in series, the base and the emitter of the triode N9 are connected with the resistor R192 in parallel, the emitter of the triode N9 is connected with the ground, the collector of the triode N9 is connected with a resistor R188 in series, one end of the resistor R188 is connected with the resistor R183 and the photoelectric coupler IC12 in series.

8. A wind pressure stabilizing circuit for a gas heating stove according to claim 7, wherein: The zero-crossing detection circuit includes a resistor R193 and a resistor R197, one end of the resistor R193 is connected with the pin 6 of the photoelectric coupler IC12, the other end of the resistor R193 is connected with a resistor R194 in series, the resistor R194 is connected with a diode D9 in series, one end of the resistor R197 is connected with the pin 3 of the electric connector CN20, the resistor R197 is connected with a resistor R198 in series, the resistor R198 is connected with the cathode of a photoelectric coupler IC13, the diode D9 is connected with the anode of the photoelectric coupler IC13, the anode and the cathode of the photoelectric coupler IC13 are connected with a diode D25 in parallel, the emitter of the photoelectric coupler IC13 is connected with a triode P13 in series, the collector of the photoelectric coupler IC13 is connected with a resistor R196 in series, the connection between the photoelectric coupler IC13 and the resistor R196 is connected with the ground, the resistor R196 is connected with the collector of the triode P13, the emitter of the triode P13 is connected with a power supply 5V, the connection between the resistor R196 and the triode P13 is connected with a resistor R195 in series, the resistor R195 is connected with a capacitor C80 in parallel, the capacitor C80 is connected with the ground, and the connection between the resistor R195 and the triode P13 is connected with a zero-crossing detection end.

9. A heating boiler water heater, characterized in that: The wind pressure stabilizing circuit of the gas heating stove includes the wind pressure stabilizing circuit of the gas heating stove according to any one of the preceding claims 1-8.

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