Gas heating water heater capable of preventing gas leakage

Abstract

The utility model relates to a fuel gas heating water heater capable of preventing fuel gas leakage, which comprises a fuel gas proportional valve, an air chamber bottom plate and a controller, and a first limit temperature controller used for detecting the temperature of the air chamber bottom plate is arranged on the air chamber bottom plate; the gas proportional valve and the first limit temperature controller are respectively in electric control connection with the controller; when the fuel gas proportional valve is in an open state, when the temperature of the air chamber bottom plate reaches a first abnormal temperature value for closing the fuel gas proportional valve, the controller closes the fuel gas proportional valve so as to cut off fuel gas conveying of the fuel gas heating water heater. The first limit temperature controller of the bottom plate of the air chamber monitors that the temperature of the bottom plate of the air chamber is in an abnormal state and feeds back a signal to the controller, and the controller cuts off the current of the fuel gas proportional valve, so that fuel gas is cut off, the fuel gas heating water heater is shut down, and fire spreading is prevented.

Description

Technical Field

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

[0002] Gas heating water heaters include burners and gas proportional valves. Some gas heating water heaters have added gas leakage alarm devices. During use, the sensitivity of the gas leakage protection device will gradually decrease as the use time increases, until it finally fails, which has the problem of service life defects. If gas leakage occurs after failure, gas alarm, cut-off and other actions cannot be performed, which cannot prevent gas leakage.

[0003] For example, Chinese patent No. ZL201910849442.6 discloses a new type of gas heating hot water boiler, including a fan, a main heat exchanger, a hot water outlet pipe assembly, a domestic hot water temperature probe, a burner assembly, a water inlet pipe assembly, an electric three-way valve, a pressure gauge, a gas proportional valve, a water inlet valve assembly, a circulating water pump, and a water pump.

[0004] Pipe connection assembly, gas pipe connection assembly, base plate, heating water outlet pipe assembly, combustion chamber front cover plate, expansion water tank, smoke hood assembly, wind pressure switch, heating water outlet, domestic hot water outlet, gas air inlet, tap water inlet, heating return water outlet.

[0005] See also Figure 1 There is an air chamber bottom plate under the combustion chamber, which is used to separate the combustion chamber and the gas proportional valve. If the gas pipeline of the gas heating hot water boiler ruptures during transportation and gas leakage occurs, an open flame is generated during use, or the combustion system fails, causing the burner to backfire, the open flame will first heat the air chamber bottom plate. If a detection device is set on the air chamber bottom plate, it can effectively prevent gas leakage.

[0006] Therefore, further improvement is needed. Utility Model Content

[0007] The utility model aims to provide a gas heating water heater which can prevent gas leakage. A first limit thermostat is provided above the gas proportional valve in the direction of gas delivery. The first limit thermostat is fixed on the bottom plate of the air chamber. If the gas heating water heater causes the gas pipeline to rupture during transportation, resulting in gas leakage, generating an open flame during use, or a combustion system fails, resulting in a backfire in the burner, the first limit thermostat of the bottom plate of the air chamber monitors that the temperature of the bottom plate of the air chamber is in an abnormal state, and feeds back a signal to a controller. The controller cuts off the current of the gas proportional valve, thereby cutting off the gas, shutting down the gas heating water heater, and preventing the spread of fire.

[0008] The purpose of the utility model is achieved in this way:

[0009] A gas heating water heater for preventing gas leakage comprises a gas proportional valve, an air chamber bottom plate, and a controller. The air chamber bottom plate is provided with a first limit thermostat for detecting the temperature of the air chamber bottom plate; the gas proportional valve and the first limit thermostat are respectively electrically connected to the controller; when the gas proportional valve is in an open state, when the temperature of the air chamber bottom plate reaches a first abnormal temperature value for closing the gas proportional valve, the controller closes the gas proportional valve to cut off the gas supply of the gas heating water heater.

[0010] A gas-fired heating water heater that prevents gas leakage also includes a second limit thermostat that is arranged on the hot water outlet pipe and is used to detect the outlet temperature of hot water. The second limit thermostat is electrically connected to the controller. When the gas proportional valve is in an open state, when the outlet temperature of the hot water reaches a second abnormal temperature value for closing the gas proportional valve, the controller closes the gas proportional valve to cut off the gas supply to the gas-fired heating water heater.

[0011] When the gas heating water heater is operating normally, the second limit thermostat on the hot water outlet pipe monitors whether the hot water temperature is normal. If an abnormal situation occurs, a feedback signal is given to the controller, and the controller cuts off the current of the gas proportional valve, thereby cutting off the gas and shutting down the gas heating water heater.

[0012] The gas proportional valve, the first limit thermostat and the second limit thermostat are respectively connected in series with the controller in an electrically controlled manner.

[0013] A gas heating water heater that prevents gas leakage also includes a combustion chamber with a burner. The combustion chamber, an air chamber bottom plate, and a gas proportional valve are arranged in an upper and lower interval. The air chamber bottom plate is arranged between the combustion chamber and the gas proportional valve. A gas delivery pipe for delivering gas to the burner is provided between the combustion chamber and the gas proportional valve.

[0014] A heat exchanger is arranged above the burner, a water outlet end of the heat exchanger is connected to a hot water outlet pipe, and a water inlet end of the heat exchanger is connected to a cold water inlet pipe.

[0015] The air chamber bottom plate is arranged to extend transversely in the furnace cavity of the gas heating water heater, and the air chamber bottom plate covers the bottom of the combustion chamber and / or the top of the gas proportional valve.

[0016] The first limit thermostat is arranged on an outer side of the air chamber bottom plate, and the first limit thermostat is located above the gas proportional valve; the air chamber bottom plate divides the furnace cavity of the gas heating water heater into a first installation cavity and a second installation cavity which are arranged independently, the combustion chamber and the first limit thermostat are arranged on the first installation cavity, and the gas proportional valve and the controller are arranged on the second installation cavity. The air chamber bottom plate effectively blocks the combustion chamber from being transmitted to the space of the second installation cavity.

[0017] The air chamber bottom plate is provided with a folded edge for positioning in the furnace cavity of the gas heating hot water boiler. The folded edge is formed by bending one side of the air chamber bottom plate. The air chamber bottom plate is positioned and installed by the folded edge, and there is no need to set up an additional supporting structure for supporting the air chamber bottom plate in the furnace cavity.

[0018] An exhaust fan connected to an exhaust pipe is arranged in the furnace cavity of the gas heating water heater to discharge excess exhaust gas from the burner.

[0019] A recess for increasing the mechanical strength of the air chamber bottom plate is provided on the bottom plate of the air chamber, and the first limit thermostat is fixed on the recess.

[0020] The beneficial effects of the utility model are as follows:

[0021] By providing a first limit thermostat located above the gas proportional valve in the direction of gas delivery, the first limit thermostat is fixed on the bottom plate of the air chamber. If the gas heating water heater causes the gas pipeline to rupture during transportation, gas leakage occurs, an open flame is generated during use, or the combustion system fails, causing the burner to flash back, the first limit thermostat of the bottom plate of the air chamber monitors that the temperature of the bottom plate of the air chamber is in an abnormal state, and feeds back a signal to the controller. The controller cuts off the current of the gas proportional valve, thereby cutting off the gas, shutting down the gas heating water heater, and preventing the spread of the fire. By adding the first limit thermostat to the bottom plate of the air chamber, the first limit thermostat is connected in series with the second limit thermostat of the hot water outlet pipe, and through temperature monitoring, a multiple linkage protection mechanism is realized for preventing overheating and dry burning of the heating furnace, preventing ignition from gas leakage, and preventing burner flashback. It not only makes up for the deficiency of the gas leakage device that the sensitivity decreases due to the long use time, but also reduces the use cost of the gas leakage prevention device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a diagram of the internal structure of a conventional gas-fired heating water boiler.

[0023] Figure 2 This is a diagram of the internal structure of a gas-fired hot water boiler according to an embodiment of the utility model.

[0024] Figure 3 This is a three-dimensional internal structure diagram of a gas-fired heating water heater according to an embodiment of the present utility model. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0026] See also Figure 2-Figure 3A gas-fired heating water heater for preventing gas leakage comprises a gas proportional valve 2, an air chamber bottom plate 3, and a controller 4. The air chamber bottom plate 3 is provided with a first limit thermostat 5 for detecting the temperature of the air chamber bottom plate 3; the gas proportional valve 2 and the first limit thermostat 5 are electrically connected to the controller 4 respectively; when the gas proportional valve 2 is in an open state, when the temperature of the air chamber bottom plate 3 reaches a first abnormal temperature value for closing the gas proportional valve 2, the controller 4 closes the gas proportional valve 2 to cut off the gas supply of the gas-fired heating water heater.

[0027] By providing a first limit thermostat 5 on the air chamber bottom plate 3, when the gas module leaks and generates an open flame to heat the air chamber bottom plate 3, the first limit thermostat 5 detects that the temperature of the air chamber bottom plate 3 is in an abnormal state, and feeds back to the controller 4 to determine that the gas module is leaking. The controller 4 promptly cuts off the gas proportional valve 2 and the gas channel to prevent the gas from continuing to leak and causing an accident.

[0028] If the gas pipeline of the gas heating water heater ruptures during transportation, causing gas leakage, generating open flames during use, or the combustion system fails, causing the burner to backfire, the first limit thermostat 5 of the air chamber bottom plate 3 monitors the temperature abnormality and feeds back a signal to the controller 4. The controller 4 cuts off the current of the gas proportional valve 2, thereby cutting off the gas and shutting down the gas heating water heater to prevent the spread of the fire.

[0029] The gas heating water heater that prevents gas leakage also includes a second limit thermostat 7 arranged on the hot water outlet pipe and used to detect the hot water outlet temperature. The second limit thermostat 7 is electrically connected to the controller 4; the gas proportional valve 2 is in an open state. When the temperature of the hot water outlet reaches the second abnormal temperature value for closing the gas proportional valve 2, the controller 4 closes the gas proportional valve 2 to cut off the gas supply of the gas heating water heater.

[0030] The gas proportional valve 2 , the first limit thermostat 5 , and the second limit thermostat 7 are respectively electrically connected in series with the controller 4 .

[0031] A gas heating water heater for preventing gas leakage also includes a combustion chamber 1 with a burner, the combustion chamber 1, an air chamber bottom plate 3, and a gas proportional valve 2 are arranged in an upper and lower interval, the air chamber bottom plate 3 is arranged between the combustion chamber 1 and the gas proportional valve 2, and a gas delivery pipe 6 for delivering gas to the burner is provided between the combustion chamber 1 and the gas proportional valve 2.

[0032] In this embodiment, an escape position for inserting the gas delivery pipe 6 is provided on the air chamber bottom plate 3 .

[0033] A heat exchanger is arranged above the burner, a water outlet end of the heat exchanger is connected to a hot water outlet pipe, and a water inlet end of the heat exchanger is connected to a cold water inlet pipe.

[0034] The air chamber bottom plate 3 is arranged to extend transversely in the furnace cavity of the gas heating water heater, and the air chamber bottom plate 3 covers the bottom of the combustion chamber 1 and / or the top of the gas proportional valve 2 .

[0035] The first limit thermostat 5 is arranged on an outer side of the air chamber bottom plate 3, and the first limit thermostat 5 is located above the gas proportional valve 2; the air chamber bottom plate 3 divides the furnace cavity of the gas heating hot water boiler into a first installation cavity 8 and a second installation cavity 9 which are independently arranged, the combustion chamber 1 and the first limit thermostat 5 are installed in the first installation cavity 8, and the gas proportional valve 2 and the controller 4 are arranged in the second installation cavity 9.

[0036] The air chamber bottom plate 3 is provided with a folded edge 10 for positioning in the furnace cavity of the gas heating water heater. One side of the air chamber bottom plate 3 is bent to form the folded edge 10.

[0037] An exhaust fan 11 connected to an exhaust pipe 12 is arranged in the furnace chamber of the gas heating water heater.

[0038] The air chamber bottom plate 3 is provided with a recess 13 for increasing the mechanical strength thereof, and the first limit thermostat 5 is fixed on the recess 13 .

[0039] 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 heating water heater for preventing gas leakage, comprising a gas proportional valve (2), an air chamber bottom plate (3), and a controller (4), characterized in that: A first limit thermostat (5) for detecting the temperature of the air chamber bottom plate (3) is provided on the air chamber bottom plate (3); the gas proportional valve (2) and the first limit thermostat (5) are respectively electrically connected to the controller (4).

2. The gas-fired heating water heater for preventing gas leakage according to claim 1, characterized in that: It also includes a second limit thermostat (7) which is arranged on the hot water outlet pipe and is used to detect the outlet temperature of the hot water. The second limit thermostat (7) is electrically connected to the controller (4).

3. The gas-fired heating water heater for preventing gas leakage according to claim 2, characterized in that: The gas proportional valve (2), the first limit thermostat (5), and the second limit thermostat (7) are respectively electrically connected in series with the controller (4).

4. The gas-fired heating water heater for preventing gas leakage according to claim 1, characterized in that: The invention also comprises a combustion chamber (1) provided with a burner, wherein the combustion chamber (1), an air chamber bottom plate (3) and a gas proportional valve (2) are arranged in an upper and lower spacing, the air chamber bottom plate (3) is arranged between the combustion chamber (1) and the gas proportional valve (2), and a gas delivery pipe (6) for delivering gas to the burner is arranged between the combustion chamber (1) and the gas proportional valve (2).

5. The gas-fired heating water heater for preventing gas leakage according to claim 4, characterized in that: A heat exchanger is arranged above the burner, a water outlet end of the heat exchanger is connected to a hot water outlet pipe, and a water inlet end of the heat exchanger is connected to a cold water inlet pipe.

6. The gas-fired heating water heater for preventing gas leakage according to claim 4, characterized in that: The air chamber bottom plate (3) is arranged to extend transversely in the furnace cavity of the gas heating water heater, and the air chamber bottom plate (3) covers the bottom of the combustion chamber (1) and / or the top of the gas proportional valve (2).

7. The gas-fired heating water heater for preventing gas leakage according to claim 4, characterized in that: The first limit thermostat (5) is arranged on an outer side of the air chamber bottom plate (3), and the first limit thermostat (5) is located above the gas proportional valve (2); the air chamber bottom plate (3) divides the furnace cavity of the gas heating water boiler into a first installation cavity (8) and a second installation cavity (9) which are arranged in an independent interval; the combustion chamber (1) and the first limit thermostat (5) are installed on the first installation cavity (8), and the gas proportional valve (2) and the controller (4) are arranged on the second installation cavity (9).

8. The gas-fired heating water heater for preventing gas leakage according to claim 1, characterized in that: The air chamber bottom plate (3) is provided with a folded edge (10) for positioning in a furnace cavity of a gas-fired heating water heater, and one side of the air chamber bottom plate (3) is bent to form the folded edge (10).

9. The gas-fired heating water heater for preventing gas leakage according to claim 1, characterized in that: An exhaust fan (11) connected to an exhaust pipe (12) is arranged in the furnace cavity of the gas-fired hot water heater.

10. The gas-fired heating water heater for preventing gas leakage according to claim 1, characterized in that: The air chamber bottom plate (3) is provided with a recess (13) for increasing its mechanical strength, and the first limit temperature controller (5) is fixed on the recess (13).

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