Gas equipment

Abstract

The utility model discloses fuel gas equipment which comprises a main body, the main body is provided with a plurality of first voltage power supply objects and a single power supply circuit, the working voltage difference value among a plurality of first voltage loads is not larger than a preset voltage difference value, and the plurality of first voltage power supply objects are connected with the same power supply output end of the single power supply circuit; the single power supply circuit is used for converting an accessed power supply into a first preset voltage and outputting the first preset voltage to a plurality of first voltage power supply objects through a power supply output end. The technical scheme of the utility model aims to improve the stability of voltage output when the gas equipment works.

Description

Technical Field

[0001] The utility model relates to the field of power supply for gas equipment, in particular to a gas equipment. Background Art

[0002] 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. However, when multiple power supply voltages are output, the power supply circuit design in the gas equipment requires many components and is costly. It will also cause unstable voltage output when the load is biased, and the circuit is complex and has low reliability. Utility Model Content

[0003] The main purpose of the utility model is to provide a gas device, aiming to improve the stability of voltage output when the gas device is working.

[0004] In order to achieve the above-mentioned purpose, the gas equipment proposed by the utility model includes:

[0005] The main body has a plurality of first voltage power supply objects, and the working voltage difference between the plurality of first voltage power supply objects is not greater than the preset voltage difference

[0006] A single power supply circuit, wherein a plurality of the first voltage power supply objects are connected to a same power supply output terminal of the single power supply circuit;

[0007] The single power supply circuit is used to transform the connected power supply into a first preset voltage and then output it to multiple first voltage power supply objects through the power output terminal.

[0008] Optionally, 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.

[0009] Optionally, the main body further has a plurality of second voltage power supply objects;

[0010] The plurality of first voltage power supply objects include a step-down circuit;

[0011] The output end of the step-down circuit is electrically connected to a plurality of second voltage power supply objects;

[0012] 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 it to a plurality of second voltage power supply objects.

[0013] Optionally, 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.

[0014] Optionally, the single power supply circuit includes:

[0015] A first main winding, wherein an input end of the first main winding is an 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;

[0016] The secondary winding has an output end which is a power output end of the single power supply circuit, and is used to convert the power connected to the first main winding into a first preset voltage and then output it to a plurality of first voltage power supply objects through the power output end.

[0017] Optionally, the single power supply circuit further includes:

[0018] a switch control chip, the switch control chip being electrically connected to the first main winding, and the switch control chip being used to control an output voltage of the single power supply circuit;

[0019] The output end of the second main winding is connected to the input end of the switch control chip, and the second main winding is used to convert the first power supply connected to the first main winding and output it to the switch control chip.

[0020] Optionally, the single power supply circuit further includes:

[0021] A feedback voltage stabilization circuit is connected between the power output terminal of the single power supply circuit and the input terminal of the switch control chip. The feedback voltage stabilization circuit is used to feedback the voltage signal of the power output terminal of the single power supply circuit to the switch control chip, so that 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.

[0022] Optionally, the feedback voltage stabilization circuit includes a first optocoupler, a first resistor, a second resistor, a third resistor, a first capacitor and an adjustable parallel 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 parallel 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 parallel regulator, the anode of the adjustable parallel regulator and the fourth end of the first optocoupler are grounded, and the third end of the first optocoupler is connected to the input end of the switch control chip.

[0023] Optionally, the single power supply circuit further includes:

[0024] A first rectifier and filter circuit, wherein the input end of the first rectifier and filter circuit is used to connect to a power source, 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 source and then output it to the first main winding;

[0025] and / or, a second rectifying and filtering circuit, wherein an input end of the second rectifying and filtering circuit is connected to an output end of the secondary winding, an output end of the second rectifying and filtering circuit is connected to a power output end of the single power supply circuit, and the second rectifying and filtering circuit is used to rectify and filter the voltage output by the secondary winding and output it through the power output end;

[0026] 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, 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.

[0027] Optionally, the gas appliance is a water heater or a wall-mounted boiler.

[0028] The utility model forms 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 single power supply circuit, and 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 multiple first voltage power supply objects through the power output end. In this way, the gas device in this scheme 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, and 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

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0030] Figure 1 This is a functional module diagram of an embodiment of the gas equipment of the utility model;

[0031] Figure 2This is a functional module schematic diagram of another embodiment of the gas equipment of the utility model;

[0032] Figure 3 This is a schematic diagram of the circuit structure of an embodiment of the gas equipment of the utility model.

[0033] Description of Figure Numbers:

[0034] Label name Label name 10 main body IC1 Switch control chip 20 First voltage supply object IC2 First optocoupler 21 Buck circuit R1~R3 First resistor to third resistor 30 Single power supply circuit C1 First capacitor 40 Second voltage supply object L1 First main winding T1 transformer L2 Secondary Winding TL Adjustable Shunt Regulator L3 Second main winding

[0035] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0038] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting 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 the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. 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 the utility model.

[0039] The utility model provides a gas equipment.

[0040] Reference Figure 1 In one embodiment of the utility model, the gas equipment comprises:

[0041] The main body 10 has a plurality of first voltage power supply objects 20, and the working voltage difference between the plurality of first voltage power supply objects 20 is not greater than a preset voltage difference;

[0042] A single power supply circuit 30, wherein a plurality of the first voltage power supply objects 20 are connected to the same power supply output terminal of the single power supply circuit 30;

[0043] 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.

[0044] In this embodiment, the main body 10 of the gas device is mainly to pass gas for combustion to convert it into heat energy for heat exchange, such as heat exchange with water and other media in the pipeline. That is, in this embodiment, the gas device can be a water heater, a wall-mounted boiler, etc. In an exemplary technology, the main body can include a shell, a burner, a fan, a gas pipeline and a heat exchange pipeline, and corresponding valve bodies can be correspondingly arranged on the gas pipeline and the heat exchange pipeline. Of course, the burner, the fan, the gas pipeline and the heat exchange pipeline are all or partially located in the shell. It can be understood that the first voltage power supply object 20 in the gas device can be a fan circuit that drives the fan to work, and a drive circuit that drives the valve body to work.

[0045] In this embodiment, the single power supply circuit 30 mainly performs voltage conversion, so it can be implemented by a transformer circuit, which can transform the connected power supply VCC and then output it to the first voltage power supply object 20. In one embodiment, in order to improve the stability of the output voltage of the single power supply circuit 30, the transformer circuit may include a transformer T1 and a rectifier filter circuit. The transformer T1 can transform the voltage of the connected power supply VCC, and the specific transformation ratio can be set according to user needs; the rectifier filter circuit can rectify and filter the transformed power supply voltage, so that multiple first voltage power supply objects 20 can receive a stable working voltage, ensuring that multiple first voltage power supply objects 20 can work normally.

[0046] The multiple first voltage power supply objects 20 in this embodiment can be connected to the same power output terminal 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 terminal of the single power supply circuit 30 to achieve connection with the multiple first voltage power supply objects 20, so as to enable the single power supply circuit 30 to output the first preset voltage to the multiple first voltage power supply objects 20.

[0047] In this embodiment, the difference in working voltage between multiple first voltage power supply objects 20 is not greater than the preset voltage difference, so that the same voltage can be used to drive them. It should be noted that in this embodiment, the working voltage between multiple first voltage power supply objects 20 can be the first preset voltage output by the single power supply circuit 30; in actual applications, the working voltage of multiple first voltage power supply objects 20 can also fluctuate within a certain range, and there can be a certain difference between the working voltage of multiple first voltage power supply objects 20 and the first preset voltage output by the single power supply circuit 30, that is, the working voltage difference between multiple first voltage power supply objects 20 is not greater than the preset voltage difference, and the preset voltage difference is set according to the actual needs of the user. For example, if the first preset voltage output by the single power supply circuit 30 can be set to 27V, the working voltage of the first voltage power supply object 20 can also be adjusted to about 27V accordingly, and the voltage fluctuation value can be 3V, and the specific fluctuation value can be obtained by testing the gas equipment multiple times. The first preset voltage value and the voltage fluctuation value in this embodiment are for reference only, and the specific first preset voltage value and the voltage fluctuation value are not limited.

[0048] It can be understood that outputting the first preset voltage to multiple first voltage power supply objects 20 can keep the working system of the gas equipment stable and prevent the circuit output from being overloaded. Taking the fan and valve in the gas equipment as an example, if different working voltages are output to the fan and valve, the fan will cause the voltage to drop instantly due to the large starting current at the moment of startup, thereby causing system instability. In this embodiment, a single power supply circuit 30 is used to provide the same voltage to the fan and valve, which can respond quickly and prevent the voltage of the two voltages from being unstable when overloaded.

[0049] The utility model is composed of a main body 10 and a single power supply circuit 30 to form a gas device, wherein the main body 10 has a plurality of first voltage power supply objects 20, the working voltage difference between the plurality of first voltage power supply objects 20 is not greater than the preset voltage difference single power supply circuit 30, and the plurality of first voltage power supply objects 20 are connected to the same power supply output end 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 supply output end. In this way, the gas device in this scheme can provide the same working voltage to the plurality of first voltage power supply objects 20 through the single power supply circuit 30, avoiding the situation that the voltage of multiple voltages is unstable when the load is biased, and improving the stability of the gas device during operation. In addition, the single power supply circuit 30 only outputs one power supply voltage, which can make the circuit structure simpler and reduce the cost of the gas device.

[0050] 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.

[0051] In this embodiment, the first voltage power supply object 20 can be an object in the gas equipment that requires high voltage power supply, such as a fan circuit, which is used to drive the fan in the gas equipment to work. The main body 10 of the gas equipment will have a burner and a gas flow channel for providing air to the burner and exhausting smoke, and the fan driven by the fan circuit is arranged in the gas flow channel. The water pump circuit can drive the water pump to work, and the water pump in the gas equipment is a machine for conveying liquid or pressurizing liquid. The step-down circuit 21 can be a first preset voltage output by the single power supply circuit 30 and then output to an object that requires low voltage power supply, such as a control chip. The relay circuit can include one or more relays, and the relay in the gas equipment can control the switch of the heating pipe. The water proportional valve and the water supply valve can control the water circulation in the gas equipment. The temperature switch circuit can detect the working temperature of the gas equipment. The first voltage power supply object 20 in the gas equipment in the utility model includes but is not limited to the above-mentioned power supply objects.

[0052] Reference Figure 2 In one embodiment, the main body 10 further has a plurality of second voltage power supply objects 40;

[0053] The plurality of first voltage power supply objects 20 include a step-down circuit 21;

[0054] The output end of the step-down circuit 21 is electrically connected to a plurality of second voltage power supply objects 40;

[0055] 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 it to a plurality of second-voltage power supply objects 40 .

[0056] In this embodiment, the main body 10 also has a plurality of second voltage power supply objects 40, in addition to the objects requiring high voltage power supply mentioned in the above embodiment, namely the first voltage power supply object 20. The gas equipment will also include objects requiring low voltage power supply, namely the second voltage power supply object 40, such as control chips and detection circuits, etc. The working voltage required by these circuits is relatively low, generally around 5V. Compared with the 27V working voltage of the fan in the above embodiment, the 5V working voltage required by the control chip is a low voltage power supply object. In order to avoid damage to low voltage components such as the control chip due to high voltage, the present embodiment can output the first preset voltage to the second voltage power supply object 40 after the voltage reduction circuit 21 is used. The voltage reduction circuit 21 can specifically be a DC-DC voltage reduction circuit 21, etc. In this way, the voltage reduction circuit 21 reduces the first preset voltage output by the single power supply circuit 30 and outputs it to the plurality of second voltage power supply objects 40, so that the low voltage components in the gas equipment can also work normally.

[0057] 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.

[0058] In this embodiment, the second voltage power supply object 40 in the main body 10 of the gas device can specifically be a main control chip, which can be used to control the startup of different power supply objects in the gas device, as well as the storage of data, etc. In the gas device, the ignition circuit can be used to ignite the gas, thereby realizing the heating function. The solenoid valve and the drive circuit are circuits used to drive the solenoid valve in the gas device. The proportional valve and the 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 the 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 the corresponding electrical signal. The second voltage power supply object 40 in the gas device in the utility model includes but is not limited to the above-mentioned power supply objects.

[0059] Referring to the figure, in one embodiment, the single power supply circuit 30 includes:

[0060] 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;

[0061] The secondary winding, the output end of the secondary winding is the power output end of the single power supply circuit 30, and the secondary winding is used to convert the power 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.

[0062] In this embodiment, a transformer can be formed by a first main winding and a secondary winding in the single power supply circuit 30, and the transformer can step up or down the connected power supply VCC, and output a first preset voltage to multiple first voltage power supply objects 20. Among them, in the working state, the first main winding can be used to continuously store and release energy and transfer energy, and the secondary winding is used to convert the energy of the first main winding, thereby outputting the first preset voltage. The power supply connected to the first main winding can be a flyback switching power supply, a forward switching power supply or an LLC power supply, etc., which is not limited in this embodiment.

[0063] Reference Figure 3 In one embodiment, the single power supply circuit 30 further includes:

[0064] A switch control chip IC1, wherein the switch control chip IC1 is electrically connected to the first main winding, and the switch control chip IC1 is used to control the output voltage of the single power supply circuit 30;

[0065] The second main winding, the output end of the second main winding is connected to the input end of the switch control chip IC1, and the second main winding is used to convert the first power supply connected to the first main winding and output it to the switch control chip IC1.

[0066] In this embodiment, the single power supply circuit 30 may also include a switch control chip IC1, a second main winding and a switch device. The switch control chip IC1 may control the on or off of the switch device, thereby controlling the energy storage or release of the first main winding. By controlling the on or off time of the switch device, the energy storage or release time of the first main winding may be controlled, thereby controlling the output energy, that is, the output voltage, of the secondary winding in the single power supply circuit 30. The second main winding may also convert the first power source connected to the first main winding, thereby supplying power to the switch control chip IC1; the conversion ratio of the second main winding to the voltage may be set according to the working voltage required by the switch control chip IC1.

[0067] Reference Figure 3 In one embodiment, the single power supply circuit 30 further includes:

[0068] A feedback voltage stabilizing circuit is connected between the power output terminal of the single power supply circuit 30 and the input terminal of the switch control chip IC1. The feedback voltage stabilizing circuit is used to feedback the voltage signal of the power output terminal 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 stabilizing circuit.

[0069] In this embodiment, in order to prevent the output voltage of the single power supply circuit 30 from being abnormal due to damage to the internal components of the single power supply circuit 30 or other reasons, so that the gas equipment cannot work normally, a feedback voltage stabilizing circuit can be set at the power output end of the single power supply circuit 30 to feed back the output voltage of the single power supply circuit 30 to the switch control chip IC1, and then the switch control chip IC1 controls the output voltage of the single power supply circuit 30 to be maintained at the first preset voltage. For example, if the output voltage of the single power supply circuit 30 exceeds the first preset voltage value, the switch control chip IC1 can control the first main winding to release energy for a shorter time, thereby reducing the voltage output by the secondary winding; if the output voltage of the single power supply circuit 30 is lower than the first preset voltage value, the switch control chip IC1 can control the first main winding to release energy for a longer time, thereby increasing the voltage output by the secondary winding, until the output voltage of the single power supply circuit 30 is maintained at the first preset voltage.

[0070] Reference Figure 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 parallel regulator TL, wherein the first end of the first resistor R1 is connected to the power output end 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 parallel 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 end of the adjustable parallel regulator TL, the anode of the adjustable parallel 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 end of the switch control chip IC1.

[0071] In this embodiment, the first resistor R1 and the second resistor R2 can play a role of voltage division, the third resistor R3 can play a role of current limiting, and the first capacitor C1 and the fifth capacitor C5 can play a role of 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 voltage stabilization role. 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.

[0072] Reference Figure 3 In one embodiment, the single power supply circuit 30 further includes:

[0073] 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 then output it to the first main winding;

[0074] and / or, a second rectifying and filtering circuit, wherein the input end of the second rectifying and filtering circuit is connected to the output end of the secondary winding, the output end of the second rectifying and filtering circuit is connected to the power output end of the single power supply circuit 30, and the second rectifying and filtering circuit is used to rectify and filter the voltage output by the secondary winding and output it through the power output end;

[0075] 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.

[0076] In this embodiment, the single power supply circuit 30 may also include one or more of a first rectifier filter circuit, a second rectifier filter circuit, and a third rectifier filter circuit. The filter circuit may be composed of components such as resistors, capacitors, and diodes. The filter circuit may rectify and filter the input power supply, and rectify and filter the power supply output by 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 a normal working state, so that the gas equipment can also maintain a normal working state. The specific circuit structure of the first rectifier filter circuit, the second rectifier filter circuit, and the third rectifier filter circuit in this embodiment can refer to Figure 3 , wherein the first rectification and filtering circuit can be composed of a first diode D1, a second capacitor C2 and a fourth resistor R4, the second rectification and filtering circuit can be composed of a second diode D2, a third capacitor C3 and a first electrolytic capacitor EC1, and the third rectification and filtering circuit can be composed of a third diode D3, a fourth capacitor C4 and a second electrolytic capacitor EC2. Figure 3 The circuit structures of the first rectifying and filtering circuit, the second rectifying and filtering circuit and the third rectifying and filtering circuit are for reference only, and the specific circuit structures are not limited in this embodiment.

[0077] In one embodiment, the gas appliance is a water heater or a wall-mounted boiler.

[0078] In this embodiment, the gas device can be a water heater or a wall-mounted boiler. In practical applications, for electronic devices with multiple power supply objects and different working voltages required by the power supply objects, the technical solution of the utility model can also be referred to to adjust the working voltage of the power supply object to a preset voltage, and make the power supply circuit in the electronic device output the preset voltage to the power supply object.

[0079] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A gas equipment, characterized in that: include: A main body, wherein 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; A single power supply circuit, wherein a plurality of the first voltage power supply objects are connected to a same power supply output terminal 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 multiple first voltage power supply objects through the power output terminal.

2. The gas equipment according to claim 1, characterized in that: 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.

3. The gas equipment according to claim 1, characterized in that: The main body also has a plurality of second voltage power supply objects; The plurality of first voltage power supply objects include a step-down circuit; The output end of the step-down circuit is electrically connected to a plurality of second voltage power supply objects; 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 it to a plurality of second voltage power supply objects.

4. The gas equipment according to claim 3, characterized in that: The multiple 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.

5. The gas equipment according to any one of claims 1 to 4, characterized in that: The single power supply circuit comprises: A first main winding, wherein an input end of the first main winding is an 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; The secondary winding has an output end which is a power output end of the single power supply circuit, and is used to convert the power connected to the first main winding into a first preset voltage and then output it to a plurality of first voltage power supply objects through the power output end.

6. The gas equipment according to claim 5, characterized in that: 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 used to control an output voltage of the single power supply circuit; The second main winding, the output end of the second main winding is connected to the input end of the switch control chip, and the second main winding is used to convert the first power supply connected to the first main winding and output it to the switch control chip.

7. The gas equipment according to claim 6, characterized in that: The single power supply circuit further includes: A feedback voltage stabilization circuit is connected between the power output terminal of the single power supply circuit and the input terminal of the switch control chip. The feedback voltage stabilization circuit is used to feedback the voltage signal of the power output terminal of the single power supply circuit to the switch control chip, so that 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.

8. The gas equipment according to claim 7, characterized in that: 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, wherein 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, and the third end of the first optocoupler is connected to the input end of the switch control chip.

9. The gas equipment according to claim 6, characterized in that: The single power supply circuit further includes: A first rectifier and filter circuit, wherein the input end of the first rectifier and filter circuit is used to connect to a power source, 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 source and then output it to the first main winding; and / or, a second rectifying and filtering circuit, wherein an input end of the second rectifying and filtering circuit is connected to an output end of the secondary winding, an output end of the second rectifying and filtering circuit is connected to a power output end of the single power supply circuit, and the second rectifying and filtering circuit is used to rectify and filter the voltage output by the secondary winding and output it through the power output end; 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, 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.

10. The gas equipment according to claim 1, characterized in that: The gas equipment is a water heater or a wall-mounted boiler.

Images