Gas device

Abstract

The present application discloses a gas device. The gas device comprises: a main body, the main body being provided with a plurality of first voltage power supply objects, and the working voltage difference between a plurality of first voltage loads being not greater than a preset voltage difference; and a single power supply circuit, the plurality of first voltage power supply objects being connected to a same power supply output end of the single power supply circuit, and the single power supply circuit being used for converting the accessed power supply into a first preset voltage and then outputting the first preset voltage to the plurality of first voltage power supply objects by means of the power supply output end.

Description

Gas equipment

[0001] This application claims priority to Chinese patent application No. 202323599806.0 filed on December 26, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of power supply for gas equipment, and in particular to a gas equipment. Background Art

[0003] The current power supply output of gas equipment has multiple power supply voltages, which are used to power different load circuits in the gas equipment to maintain the normal operation of the gas equipment. Technical issues

[0004] The main purpose of this application is to provide a gas device, aiming to improve the stability of the voltage output when the gas device is working. Technical Solutions

[0005] To achieve the above-mentioned purpose, the gas device proposed in this application includes: a main body and a single power supply circuit.

[0006] In one embodiment, the main body has a plurality of first voltage power supply objects, and a working voltage difference between the plurality of first voltage power supply objects is not greater than a preset voltage difference.

[0007] In one embodiment, a plurality of first voltage power supply objects are connected to the same power output terminal of the single power supply circuit.

[0008] In one embodiment, the single power supply circuit is used to transform the connected power supply into a first preset voltage and then output it to a plurality of first voltage power supply objects through a power output terminal.

[0009] In one embodiment, the first voltage power supply object includes one or more of a fan circuit, a water pump circuit, a step-down circuit, a relay circuit, a water proportional valve, a water supply valve, and a temperature switch circuit.

[0010] In one embodiment, the main body further has a plurality of second voltage power supply objects.

[0011] In one embodiment, the plurality of first voltage-powered objects include a step-down circuit.

[0012] In one embodiment, the output end of the step-down circuit is electrically connected to a plurality of second voltage power supply objects.

[0013] In one embodiment, the step-down circuit is used to step down the first preset voltage output by the single power supply circuit to a second preset voltage and then output the voltage to a plurality of second-voltage power supply objects.

[0014] In one embodiment, the plurality of second voltage power supply objects include one or more of a main control chip, an ignition circuit, a solenoid valve and a drive circuit, a proportional valve and a detection circuit, a fan speed detection feedback circuit, and a water pump speed detection feedback circuit.

[0015] In one embodiment, the single power supply circuit includes: a first primary winding and a secondary winding.

[0016] In one embodiment, the input end of the first main winding is the input end of the single power supply circuit, and the input end of the first main winding is used to connect to a power supply.

[0017] In one embodiment, the output end of the secondary winding is a power output end of the single power circuit.

[0018] In one embodiment, the secondary winding is used to convert the power connected to the first main winding into a first preset voltage and then output it to multiple first voltage power supply objects through the power output end.

[0019] In one embodiment, the single power supply circuit further includes: a switch control chip.

[0020] In one embodiment, the switch control chip is electrically connected to the first main winding, and the switch control chip is used to control the output voltage of the single power supply circuit.

[0021] In one embodiment, the output end of the second main winding is connected to the input end of the switch control chip.

[0022] In one embodiment, the second main winding is used to convert the first power source connected to the first main winding and output the converted power source to the switch control chip.

[0023] In one embodiment, the single power supply circuit further includes a feedback voltage stabilization circuit.

[0024] In one embodiment, it is connected between the power output terminal of the single power circuit and the input terminal of the switch control chip.

[0025] In one embodiment, the feedback voltage stabilization circuit is used to feedback the voltage signal of the power output end of the single power supply circuit to the switch control chip, and the switch control chip controls the output voltage of the single power supply circuit to maintain at a first preset voltage according to the voltage signal output by the feedback voltage stabilization circuit.

[0026] In one embodiment, the feedback voltage stabilization circuit includes a first optocoupler, a first resistor, a second resistor, a third resistor, a first capacitor, and an adjustable shunt regulator.

[0027] In one embodiment, the first end of the first resistor is connected to the power output end of the single power circuit.

[0028] In one embodiment, the second end of the first resistor is connected to the first end of the second resistor and the first end of the first optocoupler.

[0029] In one embodiment, the second end of the second resistor, the first end of the third resistor, the second end of the first optocoupler, and the cathode of the adjustable shunt regulator are connected to each other.

[0030] In one embodiment, the second end of the third resistor is connected to the first end of the first capacitor, and the second end of the first capacitor is connected to the reference end of the adjustable shunt regulator.

[0031] In one embodiment, an anode of the adjustable shunt regulator and a fourth terminal of the first optocoupler are grounded.

[0032] In one embodiment, the third terminal of the first optical coupler is connected to the input terminal of the switch control chip.

[0033] In one embodiment, the single power supply circuit further includes: a first rectifier and filter circuit, and / or a second rectifier and filter circuit, and / or a third rectifier and filter circuit.

[0034] In one embodiment, the input end of the first rectifier and filter circuit is used to access a power supply.

[0035] In one embodiment, the output end of the first rectifier and filter circuit is connected to the input end of the first main winding.

[0036] In one embodiment, the first rectifying and filtering circuit is used to rectify and filter the power supply and then output it to the first main winding.

[0037] In one embodiment, an input end of the second rectifier and filter circuit is connected to an output end of the secondary winding.

[0038] In one embodiment, the output end of the second rectifier and filter circuit is connected to the power output end of the single power circuit.

[0039] In one embodiment, the second rectifying and filtering circuit is used to rectify and filter the voltage output by the secondary winding and then output it through the power output terminal.

[0040] In one embodiment, an input end of the third rectifier and filter circuit is connected to an output end of the second main winding.

[0041] In one embodiment, the output terminal of the third rectifier and filter circuit is connected to the power supply terminal of the switch control chip.

[0042] In one embodiment, the third rectifier and filter circuit is used to rectify and filter the voltage output by the second main winding and then output it to the switch control chip.

[0043] In one embodiment, the gas appliance is a water heater or a wall-mounted boiler. Beneficial effects

[0044] The present application constitutes a gas device through a main body and a single power supply circuit, wherein the main body has multiple first voltage power supply objects, the working voltage difference between the multiple first voltage power supply objects is not greater than the preset voltage difference; the single power supply circuit, the multiple first voltage power supply objects are connected to the same power output end of the single power supply circuit; the single power supply circuit is used to transform the connected power supply into a first preset voltage and then output it to the multiple first voltage power supply objects through the power output end. In this way, the gas device in this solution can provide the same working voltage to multiple first voltage power supply objects through a single power supply circuit, avoiding the situation where the voltage of multiple voltages is unstable when the load is biased, thereby improving the stability of the gas device during operation. In addition, the use of a single power supply circuit to output only one power supply voltage can make the circuit structure simpler and reduce the cost of the gas device. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0046] FIG1 is a schematic diagram of the functional modules of an embodiment of a gas device of the present application;

[0047] FIG2 is a schematic diagram of the functional modules of another embodiment of the gas equipment of the present application;

[0048] FIG3 is a schematic diagram of the circuit structure of an embodiment of the gas device of the present application.

[0049] Description of Figure Numbers:

[0050] Reference numerals: Reference numerals: 10 Main body IC1 Switch control chip 20 First voltage power supply object IC2 First optocoupler 21 Buck circuit R1~R3 ​​First resistor~third resistor 30 Single power supply circuit C1 First capacitor 40 Second voltage power supply object L1 First main winding T1 Transformer L2 Secondary winding TL Adjustable shunt regulator L3 Second main winding

[0051] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. Modes for Carrying Out the Invention

[0052] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0053] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), such directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0054] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0055] Outputting multiple power supply voltages, the power supply circuit design in gas equipment requires many components and is costly. It can also lead to unstable voltage output when the load is biased, and the circuit is complex and has low reliability.

[0056] The present application provides a gas device.

[0057] 1 , in one embodiment of the present application, the gas device includes:

[0058] The main body 10 has a plurality of first voltage power supply objects 20, and the operating voltage difference between the plurality of first voltage power supply objects 20 is not greater than a preset voltage difference;

[0059] A single power supply circuit 30, wherein a plurality of first voltage power supply objects 20 are connected to the same power output terminal of the single power supply circuit 30;

[0060] The single power supply circuit 30 is used to transform the connected power supply VCC into a first preset voltage and then output it to multiple first voltage power supply objects 20 through the power output terminal.

[0061] In one embodiment, the main body 10 of the gas device primarily receives gas for combustion, converting it into heat energy for heat exchange, such as heat exchange with a medium such as water within a pipeline. That is, in one embodiment, the gas device may be a water heater, a wall-mounted boiler, or the like. In an exemplary embodiment, the main body may include a housing, a burner, a fan, a gas pipeline, and a heat exchange pipeline. Corresponding valve bodies may be provided on the gas pipeline and the heat exchange pipeline. Of course, components such as the burner, fan, gas pipeline, and heat exchange pipeline may be entirely or partially located within the housing. It is understood that the first voltage power supply object 20 in the gas device may be a fan circuit that drives the fan, a drive circuit that drives the valve body, and the like.

[0062] In one embodiment, the single power supply circuit 30 primarily performs voltage conversion, and therefore can be implemented using a transformer circuit. The transformer circuit can transform the input power supply VCC and then output it to the first voltage power supply object 20. In one embodiment, to improve the stability of the output voltage of the single power supply circuit 30, the transformer circuit can include a transformer T1 and a rectifier and filter circuit. The transformer T1 can transform the voltage of the input power supply VCC, and the specific conversion ratio can be set according to user needs. The rectifier and filter circuit can rectify and filter the transformed power supply voltage. In this way, the multiple first voltage power supply objects 20 can receive a stable operating voltage, ensuring the normal operation of the multiple first voltage power supply objects 20.

[0063] The multiple first voltage power supply objects 20 in this embodiment can be connected to the same power output end of the single power supply circuit 30 through multiple conductive wires, or a one-to-many adapter interface can be set at the power output end of the single power supply circuit 30 to achieve connection with multiple first voltage power supply objects 20, thereby enabling the single power supply circuit 30 to output the first preset voltage to multiple first voltage power supply objects 20.

[0064] In one embodiment, the operating voltage difference between multiple first-voltage powered objects 20 is no greater than a preset voltage difference, thus ensuring that they are driven by the same voltage. It should be noted that in this embodiment, the operating voltage between multiple first-voltage powered objects 20 can be the first preset voltage output by a single power supply circuit 30. In actual applications, the operating voltages of multiple first-voltage powered objects 20 may fluctuate within a certain range. The operating voltages of multiple first-voltage powered objects 20 may differ from the first preset voltage output by the single power supply circuit 30 by a certain amount. That is, the operating voltage difference between multiple first-voltage powered objects 20 is no greater than the preset voltage difference, and the preset voltage difference is set based on actual user needs. For example, if the first preset voltage output by the single power supply circuit 30 is set to 27V, the operating voltage of the first-voltage powered objects 20 can be adjusted to approximately 27V accordingly. The voltage fluctuation value can be 3V. The specific fluctuation value can be determined by multiple tests on gas equipment. The first preset voltage value and voltage fluctuation value in this embodiment are for reference only and are not limited to the specific first preset voltage value and voltage fluctuation value.

[0065] It can be understood that outputting the first preset voltage to multiple first-voltage power supply objects 20 can maintain the stability of the gas equipment operating system and prevent circuit output imbalance. For example, if different operating voltages were supplied to the fan and valve in a gas appliance, the high starting current would cause a momentary voltage drop at the fan startup moment, leading to system instability. However, in this embodiment, a single power supply circuit 30 provides the same voltage to the fan and valve, enabling a rapid response and preventing voltage instability caused by imbalanced loads.

[0066] The present application comprises a gas device through a main body 10 and a single power supply circuit 30, wherein the main body 10 comprises a plurality of first voltage power supply objects 20, the operating voltage difference between the plurality of first voltage power supply objects 20 being no greater than a preset voltage difference, and the plurality of first voltage power supply objects 20 being connected to the same power output terminal of the single power supply circuit 30; the single power supply circuit 30 is used to transform the connected power supply VCC into a first preset voltage and then output it to the plurality of first voltage power supply objects 20 through the power output terminal. In this way, the gas device in this solution can provide the same operating voltage to the plurality of first voltage power supply objects 20 through the single power supply circuit 30, thereby avoiding the situation where the voltage of multiple voltages is unstable when the load is biased, thereby improving the stability of the gas device during operation. In addition, the use of a single power supply circuit 30 to output only one power supply voltage can make the circuit structure simpler and reduce the cost of the gas device.

[0067] In one embodiment, the first voltage power supply object 20 includes one or more of a fan circuit, a water pump circuit, a step-down circuit 21, a relay circuit, a water proportional valve, a water supply valve, and a temperature switch circuit.

[0068] In one embodiment, the first voltage power supply target 20 may be an object in the gas appliance that requires high voltage power, such as a fan circuit used to drive the gas appliance's fan. The gas appliance's main body 10 may include a burner and a gas flow path that supplies air to the burner and exhausts flue gas. The fan driven by the fan circuit is located in the gas flow path. A water pump circuit may drive a water pump. The water pump in the gas appliance is a mechanical device used to transport or pressurize liquids. The step-down circuit 21 may be configured to step down the first preset voltage output by the single power supply circuit 30 and output it to an object requiring low voltage power, such as a control chip. A relay circuit may include one or more relays. The relays in the gas appliance can control the on / off switching of a heating element. A water proportional valve and a water supply valve can control the flow of water in the gas appliance. A temperature switch circuit can detect the operating temperature of the gas appliance. The first voltage power supply target 20 in the gas appliance herein includes, but is not limited to, the aforementioned power supply targets.

[0069] 2 , in one embodiment, the main body 10 further has a plurality of second voltage power supply objects 40 ;

[0070] The plurality of first voltage power supply objects 20 include a step-down circuit 21;

[0071] The output end of the step-down circuit 21 is electrically connected to a plurality of second voltage power supply objects 40;

[0072] The step-down circuit 21 is used to step down the first preset voltage output by the single power supply circuit 30 to a second preset voltage and then output the voltage to a plurality of second-voltage power supply objects 40 .

[0073] In one embodiment, the main body 10 further includes multiple second-voltage power supply objects 40. In addition to the objects requiring high-voltage power, namely, the first-voltage power supply objects 20, mentioned in the above embodiments, the gas appliance may also include objects requiring low-voltage power, namely, the second-voltage power supply objects 40, such as control chips and detection circuits. These circuits require a relatively low operating voltage, generally around 5V. Compared to the 27V operating voltage of the blower in the above embodiment, the 5V operating voltage required by the control chip is a low-voltage power supply object. To prevent damage to low-voltage components such as the control chip due to higher voltages, this embodiment uses a step-down circuit 21 to step down the first preset voltage and output it to the second-voltage power supply objects 40. The step-down circuit 21 may specifically be a DC-DC step-down circuit 21. In this way, the step-down circuit 21 steps down the first preset voltage output by the single power supply circuit 30 and outputs it to the multiple second-voltage power supply objects 40, enabling the low-voltage components in the gas appliance to function normally.

[0074] In one embodiment, the plurality of second voltage power supply objects 40 include one or more of a main control chip, an ignition circuit, a solenoid valve and a drive circuit, a proportional valve and a detection circuit, a fan speed detection feedback circuit, and a water pump speed detection feedback circuit.

[0075] In one embodiment, the second voltage power supply object 40 in the gas device body 10 can specifically be a main control chip, which can be used to control the startup of different power supply objects in the gas device and store data, etc. In the gas device, the ignition circuit can be used to ignite the gas, thereby achieving the heating function. The solenoid valve and drive circuit are circuits used to drive the solenoid valve in the gas device. The proportional valve and detection circuit are circuits used to detect the operation of the proportional valve in the gas device. The fan speed detection feedback circuit is a circuit used to detect the fan speed in the gas device and output a corresponding electrical signal. The water pump speed detection feedback circuit is a circuit used to detect the water pump speed in the gas device and output a corresponding electrical signal. The second voltage power supply object 40 in the gas device in this application includes but is not limited to the above-mentioned power supply objects.

[0076] Referring to the figure, in one embodiment, the single power supply circuit 30 includes:

[0077] A first main winding, wherein an input end of the first main winding is an input end of the single power supply circuit 30 , and the input end of the first main winding is used to connect to a power supply VCC;

[0078] The secondary winding has an output end that is the power output end of the single power supply circuit 30 , and is used to convert the power supply VCC connected to the first main winding into a first preset voltage and then output it to multiple first voltage power supply objects 20 through the power output end.

[0079] In one embodiment, a single power supply circuit 30 may comprise a transformer composed of a first primary winding and a secondary winding. The transformer can step up or down the voltage of the connected power source VCC and output a first preset voltage to multiple first voltage power supply objects 20. In operation, the first primary winding can be used to continuously store and release energy for energy transfer, while the secondary winding is used to convert the energy of the first primary winding to output the first preset voltage. The power supply connected to the first primary winding may be a flyback switching power supply, a forward switching power supply, or an LLC power supply, etc., without limitation in this embodiment.

[0080] 3 , in one embodiment, the single power supply circuit 30 further includes:

[0081] a switch control chip IC1, the switch control chip IC1 being electrically connected to the first main winding and configured to control the output voltage of the single power supply circuit 30;

[0082] The second main winding has an output end connected to the input end of the switch control chip IC1, and is used to convert the first power supply connected to the first main winding and output it to the switch control chip IC1.

[0083] In one embodiment, the single power supply circuit 30 may further include a switch control chip IC1, a second primary winding, and a switching device. The switch control chip IC1 can control the on / off state of the switching device, thereby controlling the energy storage or release of the first primary winding. By controlling the on / off time of the switching device, the energy storage or release time of the first primary winding can be controlled, thereby controlling the output energy, i.e., the output voltage, of the secondary winding in the single power supply circuit 30. The second primary winding can also convert the first power source connected to the first main winding to supply power to the switch control chip IC1. The voltage conversion ratio of the second main winding can be set according to the required operating voltage of the switch control chip IC1.

[0084] 3 , in one embodiment, the single power supply circuit 30 further includes:

[0085] A feedback voltage stabilization circuit is connected between the power output end of the single power supply circuit 30 and the input end of the switch control chip IC1. The feedback voltage stabilization circuit is used to feedback the voltage signal of the power output end of the single power supply circuit 30 to the switch control chip IC1, so that the switch control chip IC1 controls the output voltage of the single power supply circuit 30 to maintain at a first preset voltage according to the voltage signal output by the feedback voltage stabilization circuit.

[0086] In one embodiment, to prevent the output voltage of the single power circuit 30 from becoming abnormal due to damage to internal components of the single power circuit 30 or other reasons, thereby preventing the gas equipment from malfunctioning, a feedback voltage regulator circuit can be provided at the power output terminal of the single power circuit 30. This circuit feeds back the output voltage of the single power circuit 30 to the switch control chip IC1, which then controls the output voltage of the single power circuit 30 to maintain it at a first preset voltage. For example, if the output voltage of the single power circuit 30 exceeds the first preset voltage, the switch control chip IC1 can control the first primary winding to release energy over a shorter time period, thereby reducing the output voltage of the secondary winding. If the output voltage of the single power circuit 30 falls below the first preset voltage, the switch control chip IC1 can control the first primary winding to release energy over a longer time period, thereby increasing the output voltage of the secondary winding, until the output voltage of the single power circuit 30 remains at the first preset voltage.

[0087] 3 , in one embodiment, the feedback voltage stabilization circuit includes a first optocoupler IC2, a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1, and an adjustable shunt regulator TL. The first end of the first resistor R1 is connected to the power output terminal of the single power supply circuit 30, the second end of the first resistor R1 is connected to the first end of the second resistor R2 and the first end of the first optocoupler IC2, the second end of the second resistor R2, the first end of the third resistor R3, the second end of the first optocoupler IC2, and the cathode of the adjustable shunt regulator TL are connected to each other, the second end of the third resistor R3 is connected to the first end of the first capacitor C1, the second end of the first capacitor C1 is connected to the reference terminal of the adjustable shunt regulator TL, the anode of the adjustable shunt regulator TL and the fourth end of the first optocoupler IC2 are grounded, and the third end of the first optocoupler IC2 is connected to the input terminal of the switch control chip IC1.

[0088] In one embodiment, the first resistor R1 and the second resistor R2 can play a role in voltage division, the third resistor R3 can play a role in current limiting, and the first capacitor C1 and the fifth capacitor C5 can play a role in filtering. The fifth resistor R5 and the sixth resistor R6 are connected in parallel to adjust the circuit resistance, and the seventh resistor and the eighth resistor are connected in parallel to adjust the circuit resistance. The adjustable parallel regulator TL is TL431. When the voltage at the reference end reaches a preset value, the adjustable parallel regulator TL is turned on to play a role in voltage stabilization. The first optocoupler IC2 can achieve electrical isolation to prevent the high voltage at the power output end of the single power supply circuit 30 from being output to the switch control chip IC1, causing damage to the switch control chip IC1.

[0089] 3 , in one embodiment, the single power supply circuit 30 further includes:

[0090] a first rectifier and filter circuit, wherein the input end of the first rectifier and filter circuit is used to connect to the power supply VCC, the output end of the first rectifier and filter circuit is connected to the input end of the first main winding, and the first rectifier and filter circuit is used to rectify and filter the power supply VCC and output it to the first main winding;

[0091] and / or a second rectifier and filter circuit, wherein the input end of the second rectifier and filter circuit is connected to the output end of the secondary winding, the output end of the second rectifier and filter circuit is connected to the power output end of the single power supply circuit 30, and the second rectifier and filter circuit is used to rectify and filter the voltage output by the secondary winding and output it through the power output end;

[0092] And / or, a third rectifier and filter circuit, the input end of the third rectifier and filter circuit is connected to the output end of the second main winding, the output end of the third rectifier and filter circuit is connected to the power supply end of the switch control chip IC1, and the third rectifier and filter circuit is used to rectify and filter the voltage output by the second main winding and then output it to the switch control chip IC1.

[0093] In one embodiment, the single power supply circuit 30 may further include one or more of a first rectifier and filter circuit, a second rectifier and filter circuit, and a third rectifier and filter circuit. The filter circuit may be composed of components such as resistors, capacitors, and diodes. The filter circuit can rectify and filter the input power, as well as the power output from the winding, so that the switch control chip IC1 and the first voltage power supply object 20 can receive a stable power supply voltage, thereby maintaining normal operation, and thus the gas equipment can also maintain normal operation. The specific circuit structures of the first rectifier and filter circuit, the second rectifier and filter circuit, and the third rectifier and filter circuit in this embodiment can be referred to in Figure 3. The first rectifier and filter circuit can be composed of a first diode D1, a second capacitor C2, and a fourth resistor R4; the second rectifier and filter circuit can be composed of a second diode D2, a third capacitor C3, and a first electrolytic capacitor EC1; and the third rectifier and filter circuit can be composed of a third diode D3, a fourth capacitor C4, and a second electrolytic capacitor EC2. The circuit structures of the first rectifier and filter circuit, the second rectifier and filter circuit, and the third rectifier and filter circuit in Figure 3 are for reference only and are not limited to the specific circuit structures in this embodiment.

[0094] In one embodiment, the gas appliance is a water heater or a wall-mounted boiler.

[0095] In one embodiment, the gas appliance may be a water heater or a wall-mounted boiler. In practical applications, for electronic devices with multiple power supply objects requiring different operating voltages, the technical solution of this application can also be used to adjust the operating voltage of the power supply object to a preset voltage, and cause the power supply circuit in the electronic device to output the preset voltage to the power supply object.

[0096] The above description is merely an optional embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structural transformation made by using the contents of the present application specification and drawings under the technical concept of the present application, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present application.

Claims

1. A gas device, wherein, The gas equipment includes: A main body, the main body having a plurality of first voltage-powered objects, and the working voltage difference between the plurality of first voltage-powered objects being not greater than a preset voltage difference; A single power supply circuit, the plurality of first voltage-powered objects being connected to the same power output terminal of the single power supply circuit; The single power supply circuit is configured to convert the accessed power supply through voltage transformation into a first preset voltage and then output the first preset voltage to the plurality of first voltage-powered objects through the power output terminal.

2. The gas equipment according to claim 1, wherein The first voltage-powered objects include one or more of a fan circuit, a water pump circuit, a step-down circuit, a relay circuit, a water proportion valve, a water replenishing valve, and a temperature switch circuit.

3. The gas equipment according to claim 1 or 2, wherein The main body further has a plurality of second voltage-powered objects; The plurality of first voltage-powered objects include a step-down circuit; An output terminal of the step-down circuit is electrically connected to the plurality of second voltage-powered objects; The step-down circuit is configured to step down the first preset voltage output by the single power supply circuit to a second preset voltage and then output the second preset voltage to the plurality of second voltage-powered objects.

4. The gas equipment according to claim 3, wherein, The plurality of second voltage-powered objects include one or more of a main control chip, an ignition circuit, a solenoid valve and a driving circuit, a proportion valve and a detection circuit, a fan speed detection and feedback circuit, and a water pump speed detection and feedback circuit.

5. The gas equipment according to any one of claims 1 to 4, wherein, The single power supply circuit includes: A first main winding, an input end of the first main winding being an input end of the single power supply circuit, and the input end of the first main winding being configured to access a power supply; A secondary winding, an output end of the secondary winding being a power output terminal of the single power supply circuit, and the secondary winding being configured to convert the power supply accessed by the first main winding into a first preset voltage and then output the first preset voltage to the plurality of first voltage-powered objects through the power output terminal.

6. The gas equipment according to claim 5, wherein, The single power supply circuit further includes: A switch control chip, the switch control chip being electrically connected to the first main winding, and the switch control chip being configured to control the output voltage of the single power supply circuit; An output end of the second main winding is connected to an input end of the switch control chip, and the second main winding is configured to convert the first power supply accessed by the first main winding and then output the converted power supply to the switch control chip.

7. The gas equipment according to claim 6, wherein, The single power supply circuit further includes: A feedback voltage stabilizing circuit, connected between a power output terminal of the single power supply circuit and an input end of the switch control chip, the feedback voltage stabilizing circuit being configured to feedback and output a voltage signal of the power output terminal of the single power supply circuit to the switch control chip, and the switch control chip controlling the output voltage of the single power supply circuit to be maintained at the first preset voltage according to the voltage signal output by the feedback voltage stabilizing circuit.

8. The gas equipment according to claim 7, wherein, The feedback voltage stabilizing circuit includes a first optocoupler, a first resistor, a second resistor, a third resistor, a first capacitor, and an adjustable shunt regulator. The first end of the first resistor is connected to the power output end of the single power supply circuit. The second end of the first resistor is connected to the first end of the second resistor and the first end of the first optocoupler. The second end of the second resistor, the first end of the third resistor, the second end of the first optocoupler, and the cathode of the adjustable shunt regulator are connected to each other. The second end of the third resistor is connected to the first end of the first capacitor. The second end of the first capacitor is connected to the reference end of the adjustable shunt regulator. The anode of the adjustable shunt regulator and the fourth end of the first optocoupler are grounded. The third end of the first optocoupler is connected to the input end of the switch control chip.

9. The gas equipment according to any one of claims 6 to 8, wherein, The single power supply circuit further includes: A first rectifier filter circuit. The input end of the first rectifier filter circuit is used to connect to a power supply. The output end of the first rectifier filter circuit is connected to the input end of the first main winding. The first rectifier filter circuit is used to rectify and filter the power supply and then output it to the first main winding. And / or, a second rectifier filter circuit. The input end of the second rectifier filter circuit is connected to the output end of the secondary winding. The output end of the second rectifier filter circuit is connected to the power output end of the single power supply circuit. The second rectifier filter circuit is used to rectify and filter the voltage output by the secondary winding and then output it through the power output end. And / or, a third rectifier filter circuit. The input end of the third rectifier filter circuit is connected to the output end of the second main winding. The output end of the third rectifier filter circuit is connected to the power supply end of the switch control chip. The third rectifier filter circuit is used to rectify and filter the voltage output by the second main winding and then output it to the switch control chip.

10. The gas equipment according to any one of claims 1 to 9, wherein, The gas equipment is a water heater or a wall-mounted boiler.

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