Low-voltage safe electricity utilization control system of gas water heater and gas water heater

Abstract

The utility model discloses a low-voltage safe electricity utilization control system of a gas water heater and the gas water heater, and the low-voltage safe electricity utilization control system of the gas water heater comprises a main controller, a burner, a fan assembly and a direct-current power adapter, the direct-current power adapter comprises a safety isolation transformer, a rectifier, a photoelectric coupler and a voltage control chip which are sequentially connected. The direct-current low-voltage output end of the voltage control chip is connected with the fan assembly to supply power. The fan assembly comprises a speed-adjustable low-voltage direct-current motor and a speed controller, the speed controller is connected with the main controller in a two-way communication mode, and the speed-adjustable low-voltage direct-current motor is connected with the speed controller and controlled by the speed controller. The utility model aims to provide a low-voltage safe power utilization control system of a gas water heater and the gas water heater, and solves the problem of electric shock danger caused by power utilization safety defects in the existing alternating current controller technology.

Description

Technical Field

[0001] This utility model relates to the field of gas water heater technology, and in particular to a low-voltage safe electrical control system for gas water heaters and a gas water heater. Background Technology

[0002] Currently, electrical safety measures for gas water heaters are designed for relatively safe environments, such as homes with good grounding and leakage protection devices. However, in practice, due to various circumstances, users may lack one or two of these features, which can threaten electrical safety and lead to irreparable losses.

[0003] The so-called mature control system at present consists of a high-voltage input controller and a high-voltage AC single-phase motor. However, this system has some safety defects: (1) the system cannot detect whether the water heater is properly grounded; (2) the system cannot detect whether the user's home has a leakage current protection device. In both cases, the water heater can work normally. However, if the fan, controller, or wire breaks down, the high voltage will discharge through the machine casing, causing electric shock and other safety accidents.

[0004] In view of this, the present invention provides a low-voltage safe electrical control system for a gas water heater and a gas water heater, so as to solve the technical problems existing in the prior art. Utility Model Content

[0005] Based on the technical problems existing in the background technology, this utility model proposes a low-voltage safe electricity control system for gas water heaters and a gas water heater, which solves the electrical safety defects in current AC controller technology that lead to electric shock hazards.

[0006] To achieve the above objectives, the present invention adopts the following technical solution.

[0007] A low-voltage safety electrical control system for a gas water heater is characterized by comprising a main controller, a burner, a fan assembly, and a DC power adapter. The burner is connected to the gas inlet pipe via a solenoid valve. The DC power adapter comprises a safety isolation transformer, a rectifier, an optocoupler, and a voltage control chip connected in sequence. The low-voltage DC output terminal of the voltage control chip is connected to the fan assembly for power supply.

[0008] The gas water heater low-voltage safety electrical control system described above is characterized in that the fan assembly includes an adjustable-speed low-voltage DC motor and a speed controller, the speed controller is connected to the main controller for bidirectional communication, and the adjustable-speed low-voltage DC motor is connected to and controlled by the speed controller.

[0009] The low-voltage safe electrical control system for a gas water heater as described above is characterized in that the burner includes an ignition needle and a combustion feedback needle, which are disposed in the combustion chamber of the burner; the combustion feedback needle is connected to the main controller and feeds back the combustion chamber temperature signal to the main controller; the ignition needle is connected to the main controller, and the main controller sends a high-voltage pulse to the ignition needle for ignition.

[0010] The low-voltage safe electrical control system for a gas water heater as described above is characterized in that the solenoid valve is connected to and controlled by the main controller.

[0011] The low-voltage safety electrical control system for gas water heaters described above is characterized in that the operating voltage of the solenoid valve is 3V.

[0012] The low-voltage safety electrical control system for gas water heaters described above is characterized in that it further includes a buzzer, which is connected to and controlled by the main controller.

[0013] The low-voltage safety electrical control system for gas water heaters described above is characterized in that the DC power adapter outputs 12V and has a maximum output current of 1.5A.

[0014] A gas water heater having a low-voltage safe electrical control system as described above, characterized in that the DC power adapter is built into or externally placed in the gas water heater casing.

[0015] The gas water heater described above is characterized in that the DC power adapter is connected to a power cord, which is fixed to the outer casing of the gas water heater by a wire clip.

[0016] Compared with existing technologies, this utility model has the following advantages: This system converts high-voltage mains power into safe 12V DC power for the gas water heater via a DC power adapter, providing a safe low-voltage DC operating voltage for the gas water heater. This system greatly enhances electrical safety and prevents electric shock. Compared with traditional gas water heater systems, this system also reduces the need for a pressure switch, enhancing system stability and addressing electrical safety defects in current AC controller technology that could lead to electric shock hazards. Attached Figure Description

[0017] Figure 1 Block diagram of the low-voltage safety electrical control system for gas water heaters;

[0018] Figure 2 This is an example of a gas water heater with a tubular burner inside the casing, as described in this application.

[0019] Figure 3 This is Embodiment 2 of a gas water heater with a barrel-shaped burner inside the outer casing, as described in this application. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] like Figure 1 As shown, a low-voltage safety electrical control system for a gas water heater includes a main controller 1, a burner 2, a fan assembly 3, a DC power adapter 4, a solenoid valve 5, and a buzzer 6. The burner 2 is connected to the gas inlet pipe through the solenoid valve 5.

[0022] In the embodiments of this application, all electronic components are existing technologies. The technical solution of this application is a combination of existing electronic components to achieve the purpose of safe DC low-voltage control. The equivalent substitution of various electronic components in this application does not limit the scope of protection of this application.

[0023] In this embodiment, the DC power adapter 4 includes a safety isolation transformer 41, a rectifier 42, an optocoupler 43, and a voltage control chip 44 connected in sequence. The output voltage of the DC power adapter 4 is 12V, and the output current of the DC power adapter 4 is determined according to the actual power consumption of the gas water heater, with a designed maximum output current of 1.5A.

[0024] The DC low-voltage output terminal of the voltage control chip 44 is connected to the fan assembly 3 for power supply. The fan assembly 3 includes an adjustable-speed low-voltage DC motor 31 and a speed controller 32. The speed controller 32 is connected to the main controller 1 for bidirectional communication. The adjustable-speed low-voltage DC motor 31 is connected to the speed controller 32 and is controlled by the speed controller 32.

[0025] The burner 2 includes an ignition needle 21 and a combustion feedback needle 22, which are disposed in the combustion chamber of the burner 2. The combustion feedback needle 22 is connected to the main controller 1 and feeds back the combustion chamber temperature signal to the main controller 1. The ignition needle 21 is connected to the main controller 1, and the main controller 1 sends a high-voltage pulse to the ignition needle 21 for ignition.

[0026] Solenoid valve 4 is connected to and controlled by the main controller 1. The operating voltage of solenoid valve 4 is 3V. Buzzer 6 is connected to and controlled by the main controller 1.

[0027] like Figures 2-3As shown, a gas water heater includes a casing, a DC power adapter 4 disposed outside the casing, and a power cord for the DC power adapter 4. The power cord can be fixed to the casing of the gas water heater and secured with a wire clip. This structural design uses a single, continuous power cord for connection, without any intermediate transition sections, resulting in a simple appearance that does not affect the overall look of the water heater.

[0028] The working process of the low-voltage safety electrical control system for gas water heaters is as follows:

[0029] During operation, after power-on, the DC power adapter obtains AC power from the grid through the plug, and then internally converts it into safe low-voltage DC power for the water heater. The DC power adapter converts AC mains power into AC power at the plug, and through a safety isolation transformer, rectifier, optocoupler, and voltage control chip, it transforms household electricity into stable low-voltage power for the control system. The control system controls the fan assembly, burner ignition, solenoid valve opening, and monitors combustion in the combustion chamber. The fan assembly 3 communicates with the main controller 1 via a speed controller 32. Based on signals from the main controller 1, it automatically adjusts its operation and can detect blockages in the air duct, thus shutting down for protection.

[0030] During operation, after the main controller 1 receives power from the DC power adapter, the buzzer sounds once, indicating it has entered standby mode. When the water valve is opened, the adjustable-speed low-voltage DC motor 31 drives the fan to rotate. The adjustable-speed low-voltage DC motor 31 rotates for 5 seconds. During this time, the PWM signal of the speed controller 32 is synchronously fed back to the main controller 1 to determine whether the fan is rotating smoothly at the specified speed. At the same time, the speed of the adjustable-speed low-voltage DC motor 31 is detected and adjusted to the optimal state. If there are no abnormalities in the rotation, the main controller 1 controls the high-voltage transformer to output high-voltage electricity. Through the high-voltage wire, the ignition needle ignites the burner. After 3 seconds, the main controller 1 releases the solenoid valve 5 to allow gas to enter. The solenoid valve 5 opens the gas valve body, and the gas is supplied to the burner through the nozzle to achieve ignition and combustion to produce hot water. At this time, the combustion feedback needle synchronously detects the combustion status in an electrical manner.

[0031] During operation, the main controller 1 monitors the fan's operating status in real time. When the exhaust is blocked, the main controller 1 activates the buzzer 6 to sound an alarm and stops operating. The main controller 1 also sounds an alarm and stops operating when the combustion feedback needle does not detect a combustion signal.

[0032] In addition to the above functions, an alarm program can be built in. If the following situations occur during operation, the machine will stop and alarm: (1) the adjustable speed low voltage DC motor 31 fails to start; (2) the adjustable speed low voltage DC motor 31 has abnormal speed or stops; (3) electrical fault; (4) ignition failure; (5) flameout after combustion.

[0033] In summary, this system converts high-voltage AC mains power into safe 12V DC power for the gas water heater via a DC power adapter, providing a safe low-voltage DC operating voltage for the gas water heater. This system significantly enhances electrical safety and prevents electric shock. Compared to traditional gas water heater systems, this system also reduces the need for pressure switches found in existing gas water heaters, improving system stability and addressing electrical safety defects in current AC controller technology that could lead to electric shock hazards.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A low pressure safety electrical control system for a gas water heater, characterised in that, It includes main controller (1), burner (2), fan assembly (3) and DC power adapter (4), burner (2) is communicated with air inlet pipeline through electromagnetic valve (5), the DC power adapter (4) includes safety isolation transformer (41), rectifier (42), optoelectronic coupler (43) and voltage control chip (44) connected in sequence, the DC low voltage output end of voltage control chip (44) is connected with fan assembly (3) and is powered.

2. The low-voltage safety electrical control system for a gas water heater of claim 1, wherein, The fan assembly (3) includes adjustable speed low voltage DC motor (31) and speed controller (32), speed controller (32) is connected with the main controller (1) and communicates bidirectionally, adjustable speed low voltage DC motor (31) is connected with speed controller (32) and is controlled by speed controller (32).

3. The low-voltage safety electrical control system for a gas water heater of claim 2, wherein, The burner (2) includes ignition needle (21) and combustion feedback needle (22), ignition needle (21) and combustion feedback needle (22) are arranged in the combustion chamber of burner (2);The combustion feedback needle (22) is connected with the main controller (1), and the combustion chamber temperature signal is fed back to the main controller (1);The ignition needle (21) is connected with the main controller (1), and the main controller (1) sends high voltage pulse to the ignition needle (21) and ignites.

4. The low-voltage safety electrical control system for a gas water heater of claim 3, wherein, The electromagnetic valve (5) is connected with the main controller (1) and is controlled by the main controller (1).

5. The low-voltage safety electrical control system for a gas water heater of claim 4, wherein, The working voltage of the electromagnetic valve (5) is 3V.

6. The low-voltage safety electrical control system for a gas water heater according to claim 1 or 4, wherein It also includes a buzzer (6), the buzzer (6) is connected with the main controller (1) and is controlled by the main controller (1).

7. The low-voltage safety electrical control system for a gas water heater of claim 1, wherein, The output voltage of the DC power adapter (4) is 12V, and the maximum output current is 1.5A.

8. A gas water heater having the low voltage safety control system of any one of claims 1 to 7. The DC power adapter (4) is built-in or external to the gas water heater shell.

9. The gas water heater of claim 8, wherein, The DC power adapter (4) is connected with power line, and the power line is fixed on the gas water heater shell by wire buckle.

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