CN219301012U - Heating water heater - Google Patents

Abstract

The utility model belongs to the technical field of heat supply, and particularly discloses a heating water heater. The heating water heater comprises a combustion heat exchanger, a main burner flame feedback needle, an ignition feedback integrated needle, a main burner air supply pipeline, an auxiliary burner air supply pipeline and a control unit. The combustion heat exchanger is provided with a combustion cavity, a main burner and an auxiliary burner are arranged in the combustion cavity, the auxiliary burner is a diffusion type burner, and the auxiliary burner can transmit combustion flame to the main burner; the main burner air supply pipeline is communicated with the main burner through a premixer, and a first control valve is arranged on the main burner air supply pipeline; the output end of the auxiliary burner air supply pipeline is communicated with the auxiliary burner, and a second control valve is arranged on the auxiliary burner air supply pipeline; the first control valve, the second control valve, the main burner flame feedback needle and the ignition feedback integrated needle are all electrically connected with the control unit. The heating water heater disclosed by the utility model can ensure that the main burner of the heating water heater is ignited successfully and rapidly, stably and safely, and the safety of the heating water heater is ensured.

Description

Heating water heater

Technical Field

The utility model relates to the technical field of heat supply, in particular to a heating water heater.

Background

The full premix condensing gas heating water heater, also called as full premix heating water heater, has high heat efficiency and low pollutant emission, is energy-saving and environment-friendly, and is favored by users. When the full-premix heating water heater is in combustion, the air and the fuel gas are mixed by the premixer to form mixed gas, and the mixed gas is conveyed to the burner to burn and heat by the burner so as to heat water.

The technical development of the gas appliance faces the problem of gas diversity, in order to adapt to the change of gas performance, for some gas types with high combustion potential, the ignition condition of the gas appliance is greatly different from that of the conventional gas, and meanwhile, when the gas with high combustion potential is used, the requirement on the ignition condition of a combustor is strict. Thus, there are some safety problems for the current heating stove products using the high burning potential gas.

Disclosure of Invention

The utility model aims to provide a heating water heater, which can ensure that a main burner of the heating water heater is ignited quickly, stably and safely and successfully, and ensure the safety of the heating water heater.

The technical problems are solved by the following technical scheme:

a heating water heater, comprising:

the combustion heat exchanger is provided with a combustion cavity, a main burner and an auxiliary burner are arranged in the combustion cavity, the auxiliary burner is a diffusion type burner, and the auxiliary burner can transmit combustion flame to the main burner;

the main burner flame feedback needle is arranged in the combustion cavity and corresponds to the main burner;

the ignition feedback integrated needle is arranged in the combustion cavity and corresponds to the auxiliary burner;

a premixer;

the main burner air supply pipeline is communicated with the main burner through a premixer, and a first control valve is arranged on the main burner air supply pipeline;

the output end of the auxiliary burner air supply pipeline is communicated with the auxiliary burner, and a second control valve is arranged on the auxiliary burner air supply pipeline;

and the control unit, the first control valve, the second control valve, the main burner flame feedback needle and the ignition feedback integrated needle are electrically connected with the control unit.

Compared with the background technology, the heating water heater has the following beneficial effects:

when the heating water heater performs ignition operation, a premixer is arranged on the air supply pipeline of the main burner, so that mixed gas of air and fuel gas can be conveyed to the main burner; the auxiliary burner air supply pipeline conveys fuel gas to the auxiliary burner, and ignition feedback is integrated to perform ignition operation on the auxiliary burner. The flame of the auxiliary burner is transferred to the main burner by utilizing the diffusion combustion of the auxiliary burner, so that the mixed gas at the main burner can be ignited stably, rapidly and safely. The auxiliary burner is used for burning fuel gas firstly, and then the auxiliary burner is used for transmitting flame to the main burner, so that the phenomena of high concentration of mixed gas in a combustion cavity and easy explosion caused by large ignition power and multiple ignition are avoided when the main burner is directly used for ignition and combustion.

That is, the auxiliary burner is arranged in the heating water heater, which is helpful for improving the ignition efficiency of high-speed combustion gas, and can reach a complete combustion state, thereby improving the safety and reliability of the heating water heater.

In one embodiment, the distance between the primary burner and the secondary burner is 5mm to 10mm.

In one embodiment, the combustion heat exchanger comprises:

a combustion heat exchanger body provided with the combustion chamber having an opening;

the combustion chamber back cover is arranged on the combustion heat exchanger main body to cover the opening of the combustion chamber, and the auxiliary burner and the ignition feedback integrated needle are both arranged on the inner surface of the combustion chamber back cover.

In one embodiment, the heating water heater comprises a first mounting plate, the first mounting plate is mounted on the combustion chamber rear cover, the ignition feedback integrated needle comprises an auxiliary burner ignition needle body and an auxiliary burner flame feedback needle body, and the auxiliary burner ignition needle body and the auxiliary burner flame feedback needle body are mounted on the first mounting plate.

In one embodiment, the combustion chamber rear cover is provided with a gas connector, and the output end of the auxiliary burner gas supply pipeline is communicated with the auxiliary burner through the gas connector.

In one embodiment, a gasket is provided between the gas fitting and the combustion chamber back cover.

In one embodiment, the combustion heat exchanger comprises:

a combustion heat exchanger body provided with a combustion chamber having an opening;

the combustion chamber back cover is arranged on the combustion heat exchanger main body to cover the opening of the combustion chamber, and the main burner flame feedback needle are both arranged on the combustion chamber back cover.

In one embodiment, the heating water heater includes a second mounting plate mounted to the combustion chamber back cover, and the main burner flame feedback pin is mounted to the second mounting plate.

In one embodiment, the heating water heater further comprises an electricity storage unit electrically connected with the control unit.

In one embodiment, the premixer is provided with a first inlet, a second inlet and a premixer outlet, the first inlet is communicated with the outlet end of the main burner air supply pipeline, the premixer outlet is communicated with the main burner, and the second inlet is connected with a fan.

Drawings

Fig. 1 is a schematic structural diagram of a heating water heater according to an embodiment of the present utility model;

fig. 2 is a schematic view of a fixing structure of an auxiliary burner according to an embodiment of the present utility model.

Description of the reference numerals:

10. a housing; 101. a gas inlet; 102. a tap water inlet; 103. a second heat exchanger; 104. a bathroom hot water outlet; 1041. a bathroom temperature sensor; 105. a heating water outlet; 1051. overheat protection temperature controller; 1052. a heating water outlet temperature sensor; 106. a condensed water outlet; 107. a heating water return port; 108. an expansion tank;

1. a combustion heat exchanger; 11. A combustion chamber;

2. a main burner; 21. A main burner flame feedback needle;

3. an auxiliary burner; 31. An ignition feedback integrated needle; 32. A gas joint;

4. a main burner air supply line; 41. a first control valve; 42. a blower; 43. a premixer;

5. an auxiliary burner air supply line; 51. a second control valve;

6. a control unit;

7. an electricity storage unit;

8. a combustion chamber back cover; 81. a sealing gasket;

9. the display panel is operated.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

In the description of the present application, it should be understood that the directions or positional relationships indicated by the terms "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description of the present application and to simplify the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

Referring to fig. 1 and 2, the present embodiment provides a heating water heater capable of achieving stable ignition.

Specifically, in this embodiment, the heating water heater is a full premix gas heating water heater.

Specifically, referring to fig. 1, in the present embodiment, the heating water heater includes a combustion heat exchanger 1, a main burner 2, an auxiliary burner 3, a premixer 43, a main burner flame feedback needle 21, an ignition feedback integrated needle 31, a main burner air supply line 4, an auxiliary burner air supply line 5, and a control unit 6.

The combustion heat exchanger 1 is provided with a combustion chamber 11, a main burner 2 and an auxiliary burner 3 are arranged in the combustion chamber 11, the auxiliary burner 3 is a diffusion type burner, and the auxiliary burner 3 can transmit combustion flame to the main burner 2.

Specifically, the distance between the main burner 2 and the auxiliary burner 3 is 5mm to 10mm to ensure that the auxiliary burner 3 can stably transmit combustion flame to the main burner 2.

The main burner flame feedback needle 21 is arranged in the combustion chamber 11 and corresponds to the main burner 2; it will be appreciated that the main burner flame feedback needle 21 is capable of detecting the surface current of the flame burning in the main burner 2 and sending this current signal to the control unit 6. That is, the main burner flame feedback needle 21 can detect whether the main burner 2 is stably burning.

The ignition feedback integrated needle 31 is arranged in the combustion chamber 11 and corresponds to the auxiliary burner 3; it will be appreciated that the ignition feedback needle 31 is provided in correspondence with the secondary burner 3 for effecting ignition of the secondary burner 3 and detecting whether the combustion flame of the secondary burner 3 is stable. The ignition feedback integrated needle 31 can detect the flame surface current of the secondary burner 3 and send the current signal to the control unit 6.

The main burner air supply line 4 communicates with the main burner 2 through a premixer 43, and a first control valve 41 is provided on the main burner air supply line 4. The first control valve 41 can control the on-off of the main burner air supply pipeline 4; the premixer 43 is arranged such that the gas eventually entering the main burner 2 is a mixture of gas and air. Specifically, in the present embodiment, the first control valve 41 is a gas proportional valve.

The output end of the auxiliary burner air supply pipeline 5 is communicated with the auxiliary burner 3, and a second control valve 51 is arranged on the auxiliary burner air supply pipeline 5; the second control valve 51 can control the on-off state of the auxiliary burner gas supply line 5, and the auxiliary burner gas supply line 5 is used for delivering the gas for combustion to the auxiliary burner 3. Specifically, in the present embodiment, the second control valve 51 is a solenoid valve.

The auxiliary burner 3 is a diffusion type burner, and the auxiliary burner 3 adopts a diffusion type combustion mode, that is, oxygen required for combustion is obtained from surrounding air by virtue of diffusion, and fuel gas is not mixed with air before being ejected from the auxiliary burner 3, so that the auxiliary burner 3 is not easy to generate a deflagration phenomenon when being ignited.

After the auxiliary burner 3 is ignited, the mixed gas sprayed from the main burner 2 is easy to ignite, so that the aggregation phenomenon caused by the fact that the mixed gas is not ignited in time in the combustion chamber 11 is avoided, and the probability of deflagration in the combustion chamber 11 is effectively reduced.

The first control valve 41, the second control valve 51, the main burner flame feedback needle 21, and the ignition feedback integrated needle 31 are all electrically connected to the control unit 6.

When the heating water heater provided by the embodiment performs ignition operation, the control unit 6 controls the first control valve 41 to keep a closed state, then controls the second control valve 51 to be opened, gas with high combustion potential enters the auxiliary burner 3 through the auxiliary burner air supply pipeline 5, the ignition feedback integrated needle 31 performs ignition operation on the auxiliary burner 3, after the auxiliary burner 3 is successfully combusted, the ignition feedback integrated needle 31 can detect current on the flame surface of the auxiliary burner 3 and send the current signal to the control unit 6, and the control unit 6 receives the current signal to control the second control valve 51 to be continuously opened, so that normal combustion of the auxiliary burner 3 is maintained. After the auxiliary burner 3 burns normally, the control unit 6 controls the first control valve 41 to open, the gas with high burning potential enters the premixer 43 through the inlet end of the main burner gas supply pipeline 4, the mixed gas output by the premixer 43 enters the main burner 2 through the outlet end of the main burner gas supply pipeline 4, the auxiliary burner 3 transmits flame to the main burner 2, after the main burner 2 burns successfully, the main burner flame feedback needle 21 detects the flame surface current of the main burner 2 and feeds back the current signal to the control unit 6, the control unit 6 controls the first control valve 41 to open continuously, the normal burning of the main burner 2 is kept, meanwhile, the control unit 6 cuts off the second control valve 51, so that the auxiliary burner 3 is flamed, the heating water heater ignites successfully at the moment,

that is, in this embodiment, the mixed gas of the high combustion potential gas species and the air entering the main burner 2 is difficult to be ignited successfully at one time, in order to ensure the ignition stability of the main burner 2, the auxiliary burner 3 is ignited first, and the gas entering the auxiliary burner 3 is the high combustion potential gas species, that is, the gas entering the auxiliary burner 3 is not mixed with the air, so that the deflagration phenomenon is not easy to occur, and the ignition is stable and safe. After the auxiliary burner 3 burns stably, the auxiliary burner 3 which burns stably transmits combustion flame to the main burner 2, so that the main burner 2 can be ensured to be stable and safely ignited successfully, and the safety performance of the heating water heater is further improved.

After the main burner 2 burns stably, the auxiliary burner 3 is extinguished, so that the interference of the auxiliary burner 3 to the running state of the combustion chamber 11 is avoided, and the main burner 2 is ensured to maintain the optimal running state.

In the prior art, the fuel gas used by the full premix heating water heater is supplied through a pipeline paved by a fuel gas company, and the supplied fuel gas is 12T natural gas. For the gas species with high combustion potential, the existing full-premix heating water heater cannot directly exchange the gas.

The ignition condition of the high combustion potential gas species has larger difference with the ignition condition of the conventional fuel gas, the ignition condition of the high combustion potential gas species has strict requirements, and if deviation occurs, the explosion phenomenon can occur.

In this embodiment, the mixed gas of air and high combustion potential gas enters the main burner 2, if the mixed gas is directly ignited on the main burner 2, it is difficult to successfully ignite the mixed gas once, the mixed gas of air and high combustion potential gas sprayed from the main burner 2 continuously gathers in the combustion chamber 11, the density of the mixed gas with continuously increased concentration is small, the combustion rate is high, and when the mixed gas reaches a certain concentration, the mixed gas will generate a deflagration phenomenon when encountering a discharge spark, which is unfavorable for the safety performance of the product.

In order to avoid the occurrence of the above phenomena, the heating water heater provided in this embodiment adopts the auxiliary burner air supply pipeline 5 to convey the gas species with high combustion potential to the auxiliary burner 3, and after the ignition of the auxiliary burner 3 is successful, the auxiliary burner 3 transmits combustion flame to the main burner 2, so as to ensure the stability and safety of the ignition of the main burner 2.

Specifically, at the time of stopping, the control unit 6 receives a stopping instruction, adjusts the first control valve 41 to the minimum flow rate, and controls the second control valve 51, and the gas species with high combustion potential enters the auxiliary burner 3 through the auxiliary burner gas supply pipeline 5, and since the main burner 2 is in a combustion state at this time, the combustion flame of the main burner 2 can transmit fire to the auxiliary burner 3, so that the auxiliary burner 3 burns, the ignition feedback integrated needle 31 of the auxiliary burner 3 detects a flame surface current signal of the auxiliary burner 3, and the current signal is fed back to the control unit 6, and the control unit 6 closes the first control valve 41 first and then closes the second control valve 51.

Specifically, in this embodiment, the heating water heater further includes a housing 10, and functional components of the heating water heater are all disposed in the housing 10. The shell 10 is provided with a gas inlet 101, a total gas supply pipeline penetrates through the gas inlet 101 and enters the shell 10, and the main burner gas supply pipeline 4 and the auxiliary burner gas supply pipeline 5 are communicated with the total gas supply pipeline.

Specifically, in this embodiment, the casing 10 is further provided with a tap water inlet 102, a bathroom hot water outlet 104, a heating water outlet 105, a condensed water outlet 106 and a heating water return port 107, the inside of the casing 10 is provided with a second heat exchanger 103, the second heat exchanger 103 can exchange heat with the combustion heat exchanger 1, a circulation pipeline is further provided in the casing 10, a tap water inlet pipeline is connected between the tap water inlet 102 and the second heat exchanger 103, tap water enters the second heat exchanger 103 through the tap water inlet pipeline, and reaches the bathroom hot water outlet 104 through the circulation pipeline for users to use.

The circulating pipeline is also provided with a circulating water pump so as to ensure the driving force of water circulation.

Specifically, an expansion tank 108 is also provided in the casing 10, and a circulation line communicates with the expansion tank 108.

Specifically, in the present embodiment, the second heat exchanger 103 is a plate heat exchanger.

Specifically, in this embodiment, an overheat protection temperature controller 1051 and a heating water outlet temperature sensor 1052 are further disposed on the pipeline between the combustion heat exchanger 1 and the heating water outlet 105.

A bathroom temperature sensor 1041 is also arranged on the pipeline between the second heat exchanger 103 and the bathroom hot water outlet 104.

The arrangement of the circulation line is known to the person skilled in the art and is not described in detail here.

The combustion heat exchanger 1 is a condensing heat exchanger, adopts a stainless steel coil pipe structure, and heats water in the coil pipe in a radiation and convection heat exchange mode.

Specifically, in the present embodiment, the combustion heat exchanger 1 includes a combustion heat exchanger main body and a combustion chamber back cover 8. The combustion heat exchanger body is provided with a combustion chamber 11 having an opening. A combustion chamber back cover 8 is provided on the combustion heat exchanger body to cover the opening of the combustion chamber 11. Specifically, the combustion chamber back cover 8 is mounted to the combustion heat exchanger body by a screw connection.

The auxiliary burner 3 and the ignition feedback integrated needle 31 are arranged on the combustion chamber rear cover 8, so that the auxiliary burner 3 and the ignition feedback integrated needle 31 are mounted in the combustion chamber 11.

Specifically, in the present embodiment, the heating water heater includes a first mounting plate mounted to the combustion chamber rear cover 8. The ignition feedback needle 31 includes an auxiliary burner ignition needle and an auxiliary burner flame feedback needle. The auxiliary burner ignition needle body and the auxiliary burner flame feedback needle body are both arranged on the first mounting plate.

The auxiliary burner ignition needle body and the auxiliary burner flame feedback needle body are arranged on the first mounting plate, the first mounting plate is mounted on the inner surface of the combustion chamber rear cover 8 through screws, and the installation of the auxiliary burner ignition needle body and the auxiliary burner flame feedback needle body in the combustion chamber 11 can be completed.

Specifically, the operation of the secondary burner ignition needle and secondary burner flame feedback needle is well known to those skilled in the art and will not be described in detail herein.

Specifically, a gas connector 32 is mounted on the combustion chamber rear cover 8, and the output end of the auxiliary burner gas supply pipeline 5 is communicated with the auxiliary burner 3 through the gas connector 32.

Specifically, the gas fitting 32 is locked to the combustion chamber back cover 8 by a tightening screw.

In order to ensure the tightness of the installation of the gas fitting 32, in the present embodiment, a gasket 81 is provided between the gas fitting 32 and the combustion chamber back cover 8.

Specifically, the gasket 81 is made of rubber or silica gel.

More specifically, the main burner 2 and the main burner flame feedback needle 21 are both provided to the combustion chamber back cover 8.

It will be appreciated that the mounting positional relationship of the main burner 2 and the main burner flame feedback needle 21 is well known to those skilled in the art and will not be described in any great detail herein.

The principle of operation of the main burner flame feedback needle 21 is also known in the art and will not be described in any great detail herein.

Specifically, in the present embodiment, the heating water heater includes a second mounting plate mounted to the combustion chamber rear cover 8, and the main burner flame feedback needle 21 is mounted to the second mounting plate.

Specifically, in the present embodiment, the premixing mode of the premixer 43 is post-premixing.

The premixer 43 is provided with a first inlet, a second inlet and a premixer outlet, the first inlet is communicated with the outlet end of the main burner air supply pipeline 4, the outlet of the premixer 43 is communicated with the main burner 2, and the second inlet is connected with a fan 42.

That is, in the present embodiment, after the air passes through the fan 42, the air is mixed with the fuel gas, which is a post-premixing mode.

If the gas and air are mixed before passing through the fan, the premixing mode is a pre-premixing mode. If the premixing mode is adopted before use, the operation of the premixing fan may cause an increased explosion risk in the process of mixing the gas species with high combustion potential with air by the premixing device.

In this embodiment, the premixing mode of the fully premixed gas heating water heater is post premixing, and the post premixing mode is safer, so that the explosion risk possibly caused by the operation of the fan 42 is reduced.

Specifically, in the present embodiment, the fan 42 is a dc speed-regulating fan.

When the first control valve 41 is opened, the high-combustion-potential gas species enter the premixer 43 through the main burner gas supply line 4, are premixed with the high-pressure air passing through the blower 42, and enter the main burner 2.

Specifically, in this embodiment, the heating water heater further includes an electricity storage unit 7, and the electricity storage unit 7 is electrically connected with the control unit 6.

When the accidental power supply is interrupted, the sudden stop of the fan 42 may also cause unstable combustion states such as tempering and the like in the heating water heater, and may cause adverse effects on product safety. To avoid this, in the present embodiment, the heating water heater further includes an electricity storage unit 7, and the electricity storage unit 7 is electrically connected to the control unit 6 for supplying power to the control unit 6. That is, when the mains supply fails, the electricity storage unit 7 can supply electricity to the control unit 6, so that the heating water heater can be stopped normally.

Further, the heating water heater further comprises an operation display panel 9, and the operation display panel 9 is arranged on the outer surface of the shell 10, so that a user can conveniently operate the heating water heater. Specifically, the operation display panel 9 is electrically connected to the control unit 6, and the user operates the operation display panel 9, i.e., the operation of the control unit 6 can be achieved.

The ignition operation of the heating water heater is described in detail below, for example.

When a user has a heating or bathroom demand, the user gives a demand instruction through the operation display panel 9. After the control unit 6 receives the related instruction, the control unit 6 checks whether the water pressure sensor of the circulating pipeline detects water pressure according to control logic, when the detected water pressure meets a required value, the water pressure sensor is closed, the circulating water pump is started, the fan 42 is started, and after the control unit 6 receives a rotating speed feedback signal of the fan 42, the operating voltage is continuously provided for the fan 42, and at the moment, the cleaning stage before the cleaning is started.

After the previous cleaning stage lasts for a few seconds, the ignition feedback integrated needle 31 starts to discharge, the fan 42 is adjusted to the lowest rotation speed to operate, the first control valve 41 is kept in a closed state, then the second control valve 51 is opened, gas with high combustion potential enters the auxiliary burner 3 through the auxiliary burner gas supply pipeline 5 to ignite, when the auxiliary burner 3 burns successfully, the ignition feedback integrated needle 31 can detect current on the flame surface, and when the control unit 6 receives a current signal, the valve voltage is continuously opened for the second control valve 51, and the normal combustion of the auxiliary burner 3 is maintained.

After the secondary burner 3 burns normally, the first control valve 41 is opened, the gas with high burning potential is output at the minimum flow rate, flows through the main burner gas supply pipeline 4 to enter the premixer 43, is premixed with the high pressure passing through the fan 42, and enters the main burner 2, and the secondary burner 3 transmits combustion flame to the main burner 2.

After the main burner 2 burns successfully, the main burner flame feedback needle 21 detects the flame surface current, after the current signal is fed back to the control unit 6, the control unit 6 can continuously provide the valve opening voltage for the first control valve 41 to keep the normal burning of the main burner 2, and meanwhile, the control unit 6 cuts off the power supply voltage of the second control valve 51 to ensure that the auxiliary burner 3 is flameout, and the heating water heater automatically adjusts according to the load requirement and enters a normal working state.

The main burner 2 has a large number of fire holes, and has high ignition power and high risk of explosion. And if ignition is directly performed on the main burner 2, the ignition is difficult to succeed once because the mixture of air and fuel gas enters the main burner 2, and the ignition needs to be performed for many times. When the gas mixture is ignited for several times, the gas mixture sprayed from the main burner 2 and the gas mixture are accumulated in the combustion chamber 11, and when the gas mixture reaches a certain concentration, the gas mixture collides with the discharge spark to generate deflagration. In the heating water heater provided by the embodiment, the auxiliary burner 3 controls the ignition and extinction of the main burner 2, and the auxiliary burner 3 can control the primary ignition of the main burner 2 to succeed, so that dangerous combustion caused by direct ignition on the main burner 2 is avoided.

The shutdown operation of the heating water heater is described in detail below, for example.

When the heating water heater needs to be controlled to stop, a user gives a stop instruction through the operation display panel 9. After the control unit 6 receives the shutdown instruction, the first control valve 41 is regulated to minimum flow, meanwhile, the rotating speed of the fan 42 is also regulated to minimum, the second control valve 51 is opened, gas with high combustion potential enters the auxiliary burner 3 through the auxiliary burner air supply pipeline 5, combustion flame of the main burner 2 transmits fire to the auxiliary burner 3 for combustion, when a combustion flame surface current signal of the auxiliary burner 3 is fed back to the control unit 6, the control unit 6 closes the first control valve 41 within 1s and then closes the second control valve 51 after 1s, after the rotating speed of the fan 42 is regulated to maximum, the heating water heater enters a post-cleaning stage, and after the post-cleaning stage of set time is completed, the fan 42 stops running, so far, the heating water heater enters a shutdown state.

If the heating water heater is in normal operation, the mains supply is abnormally powered off. At this time, the electricity storage unit 7 is automatically switched into a power supply mode to temporarily replace an external power supply and maintain the system control time for more than 5s of the heating water heater. The method comprises the following steps: when the mains supply is abnormally interrupted, the electricity storage unit 7 automatically switches to a power supply mode immediately to supply power to the control unit 6, the control unit 6 regulates the gas flow of the first control valve 41 to the minimum in 1s, regulates the rotating speed of the fan 42 to the minimum, controls the second control valve 51 to be opened, gas seeds with high combustion potential enter the auxiliary burner 3 through the auxiliary burner air supply pipeline 5, and is burnt by the combustion flame of the main burner 2 in a fire transmission manner to the auxiliary burner 3, when the current signal of the combustion flame surface of the auxiliary burner 3 is fed back to the control unit 6, the control unit 6 closes the first control valve 41 in 1s and then closes the second control valve 51 in 1s, after the rotating speed of the fan 42 is regulated to the maximum, the heating water heater enters a post-cleaning stage, after the post-cleaning stage for a set time is completed, the fan 42 stops running, so far, the heating water heater automatically switches to enter a power-off state in 5s, and when the mains supply is normal, the electricity storage unit 7 charges and stores electricity through the mains supply.

In this embodiment, when the heating water heater is controlled to stop, the auxiliary burner 3 maintains a combustion state in the combustion chamber 11, and even if a small amount of unburned gas flows out from the main burner gas supply pipeline 4 in the main burner 2, the flowed gas is ignited and consumed by the auxiliary burner 3 in the combustion chamber 11, so that the phenomenon of unburned gas discharge is avoided.

In the specific content of the above embodiment, any combination of the technical features may be performed without contradiction, and for brevity of description, all possible combinations of the technical features are not described, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing detailed description of the embodiments presents only a few embodiments of the present utility model, which are described in some detail and are not intended to limit the scope of the present utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. A heating water heater, comprising:

the combustion heat exchanger (1), the combustion heat exchanger (1) is provided with a combustion chamber (11), a main burner (2) and an auxiliary burner (3) are arranged in the combustion chamber (11), the auxiliary burner (3) is a diffusion type burner, and the auxiliary burner (3) can transmit combustion flame to the main burner (2);

a main burner flame feedback needle (21) arranged in the combustion chamber (11) and corresponding to the main burner (2);

an ignition feedback integrated needle (31) which is arranged in the combustion chamber (11) and is arranged corresponding to the auxiliary burner (3);

a premixer (43);

a main burner air supply pipeline (4) which is communicated with the main burner (2) through a premixer (43), wherein a first control valve (41) is arranged on the main burner air supply pipeline (4);

the output end of the auxiliary burner air supply pipeline (5) is communicated with the auxiliary burner (3), and a second control valve (51) is arranged on the auxiliary burner air supply pipeline (5);

the control unit (6), the first control valve (41), the second control valve (51), the main burner flame feedback needle (21) and the ignition feedback integrated needle (31) are all electrically connected with the control unit (6).

2. A heating water heater according to claim 1, characterized in that the distance between the main burner (2) and the auxiliary burner (3) is 5-10 mm.

3. A heating water heater according to claim 1, characterized in that the combustion heat exchanger (1) comprises:

a combustion heat exchanger body provided with the combustion chamber (11) having an opening;

the combustion chamber rear cover (8) is arranged on the combustion heat exchanger main body to cover the opening of the combustion chamber (11), and the auxiliary burner (3) and the ignition feedback integrated needle (31) are both arranged on the inner surface of the combustion chamber rear cover (8).

4. A heating water heater according to claim 3, characterized in that the heating water heater comprises a first mounting plate mounted to the combustion chamber rear cover (8), the ignition feedback integrated needle (31) comprises an auxiliary burner ignition needle and an auxiliary burner flame feedback needle, both of which are mounted to the first mounting plate.

5. A heating water heater as claimed in claim 3, wherein a gas connector (32) is mounted on the combustion chamber rear cover (8), and the output end of the auxiliary burner gas supply pipeline (5) is communicated with the auxiliary burner (3) through the gas connector (32).

6. The heating water heater according to claim 5, characterized in that a gasket (81) is provided between the gas fitting (32) and the combustion chamber back cover (8).

7. A heating water heater according to claim 1, characterized in that the combustion heat exchanger (1) comprises:

a combustion heat exchanger body provided with a combustion chamber (11) having an opening;

the combustion chamber back cover (8) is arranged on the combustion heat exchanger main body to cover the opening of the combustion chamber (11), and the main burner (2) and the main burner flame feedback needle (21) are both arranged on the combustion chamber back cover (8).

8. The heating water heater according to claim 7, characterized in that it comprises a second mounting plate mounted to the combustion chamber back cover (8), to which the main burner flame feedback needle (21) is mounted.

9. The heating water heater according to claim 1, further comprising an electricity storage unit (7), the electricity storage unit (7) being electrically connected with the control unit (6).

10. A heating water heater according to any one of claims 1-9, wherein the premixer (43) is provided with a first inlet, a second inlet and a premixer outlet, the first inlet being in communication with the outlet end of the main burner air supply line (4), the premixer outlet being in communication with the main burner (2), the second inlet being connected with a fan (42).

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