Gas water heater capable of preventing gas leakage

Abstract

The utility model relates to a gas water heater capable of preventing gas leakage, which comprises a gas proportional valve and a bracket, wherein the gas proportional valve is used for switching on and off gas transmission to a burner and is in electric control connection with a controller, and the bracket is used for mounting a first temperature controller; in the open state of the gas proportional valve, gas leaks in the conveying process and generates open fire to heat the support, the first temperature controller detects that the temperature of the support reaches a first disconnection temperature value and feeds back the first disconnection temperature value to the controller, the first temperature controller is disconnected, the controller closes the gas proportional valve, conveying of the gas to the combustor is cut off, and then continuous leakage of the gas is prevented. By means of the mode of detecting gas leakage through the first temperature controller and the support, hidden dangers such as fire disasters caused by gas leakage of the gas water heater can be simply and efficiently prevented, and the defect that the service life of the gas alarm device is not equal to that of the gas water heater is overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of gas appliance combustion, in particular to a gas water heater which can prevent gas leakage. Background Art

[0002] The gas circuit connection of the gas water heater is connected by screws through a sealing ring at the connection between the gas distribution rod and the gas proportional valve. During transportation, due to vibration and other reasons, there is a possibility of loosening or breakage of the gas distribution rod. When the gas water heater is installed, there is a risk of gas leakage and fire. After a long period of use, the sealing ring may fail and leak. Although some gas water heaters have added gas leakage alarm devices, the sensitivity of the gas leakage alarm device will gradually decrease as the use time increases until it fails. There is a problem of service life defects. If a gas leak occurs after failure, it is impossible to perform gas alarms, cut-offs, etc., and it cannot prevent gas leaks. Utility Model Content

[0003] The utility model aims to provide a gas water heater which is resistant to gas leakage. A bracket for installing a first thermostat is provided above a gas proportional valve or on an outer side of a gas delivery track. When gas leakage generates an open flame and heats the bracket, the heat of the bracket is transferred to the first thermostat. When the first thermostat detects that the temperature of the bracket reaches a first disconnection temperature value, the first thermostat disconnects, and a controller closes the gas proportional valve to automatically cut off the delivery of gas to the combustion chamber, thereby solving the technical problem that the gas water heater catches fire due to gas pipeline leakage and the inability to cut off the gas source. The utility model also solves the technical problem that when the service life of the gas alarm is not equal to that of the gas water heater, the sensitivity of the alarm is reduced, and the alarm protection effect cannot be achieved.

[0004] The purpose of the utility model is achieved in this way:

[0005] A gas water heater that prevents gas leakage, including a gas proportional valve for turning on and off gas supply to a burner and electrically connected to a controller, and also including a bracket for installing a first thermostat; the controller is electrically connected to the first thermostat; when the gas proportional valve is in an open state, gas leaks during the supply process and generates an open flame to heat the bracket, the first thermostat detects that the temperature of the bracket reaches a first disconnection temperature value and feeds back to the controller, the first thermostat disconnects, the controller closes the gas proportional valve, disconnects the gas supply to the burner, and prevents the gas from continuing to leak.

[0006] The gas water heater also includes a heat exchanger connected to the water inlet pipe. The heat exchanger is provided with a second thermostat electrically connected to the controller. The second thermostat detects that the temperature of the heat exchanger reaches a second disconnection temperature value and feeds back to the controller, and the second thermostat disconnects.

[0007] The first thermostat, the second thermostat, the controller and the gas proportional valve are electrically connected in series in sequence.

[0008] The bracket is arranged above the gas proportional valve and / or the bracket is arranged on an outer side of the gas delivery track.

[0009] A gas dividing rod is arranged between the burner and the gas proportional valve, one end of the gas dividing rod is connected to the gas output port of the gas proportional valve, and the other end of the gas dividing rod is connected to the gas input port of the burner.

[0010] The bracket comprises a supporting arm, the supporting arm is located above the gas proportional valve, and the first thermostat is fixed on the supporting arm; the supporting arm is fixed on the inner cavity of the gas water heater.

[0011] The part of the support arm that fixes the first thermostat is extended laterally toward the gas proportional valve to increase the heating area of ​​the bracket during gas leakage. When gas leakage occurs, the first thermostat can quickly detect the heating temperature of the bracket and cut off the gas source in time to prevent excessive gas leakage.

[0012] The bracket also includes a fixed arm connected to the supporting arm, and the fixed arm is fixed on the inner cavity of the gas water heater. The fixed arm plays a role of strengthening support, and the fixed arm also plays a role of heat conduction.

[0013] The controller is fixed on the inner cavity of the gas water heater, and the first temperature controller is electrically connected to the controller via a wire.

[0014] The gas water heater also includes a fan and a heat exchanger arranged on the inner cavity of the gas water heater. The air intake of the fan is located above the heat exchanger. The gas water heater body is provided with a smoke exhaust duct, and the air outlet of the fan is connected to the smoke exhaust duct.

[0015] The beneficial effects of the utility model are as follows:

[0016] By providing a bracket for installing the first thermostat above the gas proportional valve or on an outer side of the gas delivery track, when the gas leakage produces an open flame and heats the bracket, the heat of the bracket is transferred to the first thermostat. When the first thermostat detects that the temperature of the bracket reaches the first disconnection temperature value, the first thermostat disconnects, and the controller closes the gas proportional valve to automatically cut off the delivery of gas to the combustion chamber. This solves the technical problem that the gas pipeline of the gas water heater leaks and the gas source cannot be cut off, resulting in a fire in the gas water heater. It also solves the technical problem that when the service life of the gas alarm is not equal to that of the gas water heater, the sensitivity of the alarm will be reduced and the alarm protection effect will not be achieved. By detecting gas leakage through the first thermostat and the bracket, it is possible to simply and efficiently prevent the gas water heater from leaking and causing hidden dangers such as fire, and make up for the lack of inequality between the life of the gas alarm device and the life of the gas water heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the plan structure of a gas water heater according to an embodiment of the utility model.

[0018] Figure 2 This is a schematic diagram of the connection structure of a controller, a temperature controller, and a gas proportional valve in one embodiment of the utility model.

[0019] Figure 3 This is a structural schematic diagram of an embodiment of the utility model in which a first temperature controller is installed on a bracket. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0021] See also Figure 1-Figure 3 A gas water heater for preventing gas leakage includes a gas proportional valve 2 for switching on and off gas supply to a burner 5 and electrically connected to a controller 1, and also includes a bracket 4 for mounting a first thermostat 3, and the controller 1 is electrically connected to the first thermostat 3; when the gas proportional valve 2 is in an open state, gas leaks during the supply process and generates an open flame to heat the bracket 4, the first thermostat 3 detects that the temperature of the bracket 4 reaches a first disconnection temperature value and feeds back to the controller 1, the first thermostat 3 is disconnected, and the controller 1 closes the gas proportional valve 2, disconnects the supply of gas to the burner 5, and prevents further leakage of gas.

[0022] The gas water heater also includes a heat exchanger 6 connected to the water inlet pipe. The heat exchanger 6 is provided with a second thermostat 7 electrically connected to the controller 1. The second thermostat 7 detects that the temperature of the heat exchanger 6 reaches a second disconnection temperature value and feeds back to the controller 1, and the second thermostat 7 disconnects.

[0023] The first thermostat 3, the second thermostat 7, the controller 1, and the gas proportional valve 2 are electrically connected in series in sequence.

[0024] The bracket 4 is arranged above the gas proportional valve 2 and / or the bracket 4 is arranged on an outer side of the gas conveying track.

[0025] A gas dividing rod 8 is provided between the burner 5 and the gas proportional valve 2 , one end of the gas dividing rod 8 is connected to the gas output port of the gas proportional valve 2 , and the other end of the gas dividing rod 8 is connected to the gas input port of the burner 5 .

[0026] The bracket 4 includes a supporting arm 9, which is located above the gas proportional valve 2, and the first thermostat 3 is fixed on the supporting arm 9; the supporting arm 9 is fixed on the inner cavity of the gas water heater.

[0027] The portion of the support arm 9 that fixes and supports the first thermostat 3 is extended laterally toward the gas proportional valve 2 to increase the heating area of ​​the bracket 4 during the gas leakage process.

[0028] In this embodiment, the first thermostat 3 is fixed to the support arm 9 of the bracket 4 by screws.

[0029] In this embodiment, the support arm 9 is fixed to the inner cavity of the gas water heater by screws.

[0030] The bracket 4 further includes a fixing arm 10 connected to the supporting arm 9, and the fixing arm 10 is fixed on the inner cavity of the gas water heater.

[0031] In this embodiment, the fixing arm 10 is fixed to the inner cavity of the gas water heater by screws.

[0032] The controller 1 is fixed on the inner cavity of the gas water heater, and the first thermostat 3 is electrically connected to the controller 1 via a wire.

[0033] The gas water heater also includes a fan 11 and a heat exchanger 6 arranged on the inner cavity of the gas water heater. The air intake of the fan 11 is located above the heat exchanger 6. A smoke exhaust duct 12 is provided on the gas water heater body, and the air outlet of the fan 11 is connected to the smoke exhaust duct 12.

[0034] In this embodiment, the fan 11, the heat exchanger 6, etc. are respectively fixed to the inner cavity of the gas water heater body through corresponding mounting brackets.

[0035] The functions of the above components are as follows:

[0036] The first and second thermostats 3 and 7: When the thermostat detects that the environment has reached a certain temperature, the thermostat will disconnect the circuit;

[0037] Controller 1: a control system for rectifying a gas water heater. In this embodiment, the controller 1 includes a control circuit board and a main control chip arranged on the control circuit board;

[0038] Bracket 4: used for collecting the heat of leaking combustion and installing the first thermostat;

[0039] Gas distribution rod 8: connects the gas path between the gas proportional valve and the burner;

[0040] Gas proportional valve 2: used to control the gas flow entering the burner and the gas switch;

[0041] Burner 5: gas burner device;

[0042] Heat exchanger 6: a device that converts the heat of the gas burner into the heat of hot water;

[0043] Fan 11: a device for discharging the exhaust gas from the burner.

[0044] The above is a preferred embodiment of the utility model, which shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A gas water heater for preventing gas leakage, comprising a gas proportional valve (2) for switching on and off gas supply to a burner (5) and electrically connected to a controller (1), characterized in that: The invention also comprises a bracket (4) for mounting a first thermostat (3); the controller (1) is electrically connected to the first thermostat (3); when the gas proportional valve (2) is in an open state, gas leaks during the transportation process and generates an open flame to heat the bracket (4), the first thermostat (3) detects that the temperature of the bracket (4) reaches a first disconnection temperature value and feeds back to the controller (1), the first thermostat (3) disconnects, and the controller (1) closes the gas proportional valve (2), disconnects the gas supply to the burner (5), and prevents the gas from continuing to leak.

2. The gas water heater for preventing gas leakage according to claim 1, characterized in that: It also includes a heat exchanger (6) connected to the water inlet pipe, and a second temperature controller (7) is provided on the heat exchanger (6) and is electrically connected to the controller (1). The second temperature controller (7) detects that the temperature of the heat exchanger (6) reaches a second disconnection temperature value and feeds back to the controller (1), and the second temperature controller (7) disconnects.

3. The gas water heater for preventing gas leakage according to claim 2, characterized in that: The first thermostat (3), the second thermostat (7), the controller (1), and the gas proportional valve (2) are electrically connected in series in sequence.

4. The gas water heater for preventing gas leakage according to claim 1, characterized in that: The bracket (4) is arranged above the gas proportional valve (2) and / or the bracket (4) is arranged on an outer side of a gas delivery track.

5. The gas water heater for preventing gas leakage according to claim 1, characterized in that: A gas distribution rod (8) is provided between the burner (5) and the gas proportional valve (2); one end of the gas distribution rod (8) is connected to the gas output port of the gas proportional valve (2), and the other end of the gas distribution rod (8) is connected to the gas input port of the burner (5).

6. The gas water heater for preventing gas leakage according to claim 1, characterized in that: The support (4) comprises a support arm (9), the support arm (9) is located above the gas proportional valve (2), and the first temperature controller (3) is fixed on the support arm (9); the support arm (9) is fixed on the inner cavity of the gas water heater.

7. The gas water heater for preventing gas leakage according to claim 6, characterized in that: The portion of the support arm (9) that fixedly supports the first thermostat (3) is arranged to extend laterally toward the gas proportional valve (2) so as to increase the heating area of ​​the bracket (4) during the gas leakage process.

8. The gas water heater for preventing gas leakage according to claim 6, characterized in that: The bracket (4) further comprises a fixing arm (10) connected to the supporting arm (9), wherein the fixing arm (10) is fixed to the inner cavity of the gas water heater.

9. The gas water heater for preventing gas leakage according to claim 1, characterized in that: The controller (1) is fixed on the inner cavity of the gas water heater, and the first temperature controller (3) is electrically connected to the controller (1) via a wire.

10. The gas water heater for preventing gas leakage according to claim 1, characterized in that: It also includes a fan (11) and a heat exchanger (6) arranged on the inner cavity of the gas water heater, wherein the air intake of the fan (11) is located above the heat exchanger (6), and the gas water heater is provided with a smoke exhaust duct (12), and the air outlet of the fan (11) is connected to the smoke exhaust duct (12).

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