CN217423642U

CN217423642U - Gas water heater with back pressure pipe

Info

Publication number: CN217423642U
Application number: CN202220720426.4U
Authority: CN
Inventors: 卢宇轩; 劳耀荣; 张其; 王杰盛
Original assignee: Guangdong Vanward New Electric Co Ltd
Current assignee: Guangdong Vanward New Electric Co Ltd
Priority date: 2022-03-24
Filing date: 2022-03-24
Publication date: 2022-09-13
Anticipated expiration: 2032-03-24

Abstract

The utility model discloses a gas water heater with a back pressure pipe, which comprises a combustion chamber, wherein a combustor is arranged in the combustion chamber, the combustion chamber is provided with a combustion chamber pressure taking port, and the combustion chamber pressure taking port is positioned below the combustor; the heat exchanger is positioned above the combustion chamber, the combustion chamber is used for heating the heat exchanger, and the heat exchanger is connected with a water inlet pipe and a water outlet pipe; the proportional valve is used for controlling the combustion flow entering the combustion chamber, an upper cavity and a lower cavity are arranged in the proportional valve, a gas passage is formed in the upper cavity, and a proportional valve vent is formed in the lower cavity; one end of the back pressure pipe is connected with the proportional valve air port, and the other end of the back pressure pipe is connected with the combustion chamber pressure taking port. The problems that the load of the gas water heater is uncontrollably changed, the smoke emission exceeds standard and the gas heater is suddenly cooled and suddenly heated when the smoke outlet and the air inlet of the gas water heater are blocked are solved.

Description

Gas water heater with back pressure pipe

Technical Field

The utility model relates to a water heater field especially relates to a take gas heater of back pressure pipe.

Background

Along with the continuous improvement that people pursue the quality of life, also the requirement of experiencing with hot water is continuous improvement, and gas instantaneous water heater is liked by more and more consumers with its characteristics such as convenient, the produced heat water volume is big, temperature is constant.

At present, load changes of gas water heaters in the market are inconsistent when a smoke outlet and a gas inlet are blocked, and a series of problems of water heater temperature gear breaking, sudden cooling and sudden heating, excessive smoke emission and the like are caused.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a gas water heater with a back pressure pipe to solve the problems that the load of the gas water heater is uncontrollably changed, the smoke emission exceeds the standard and is suddenly cooled and suddenly heated when the smoke outlet and the air inlet of the gas water heater are blocked.

The purpose of the utility model is realized by adopting the following technical scheme:

a gas water heater with back pressure pipe, comprising:

the combustor is internally provided with a combustor, the combustor is provided with a combustor pressure taking port, and the combustor pressure taking port is positioned below the combustor;

the heat exchanger is positioned above the combustion chamber, the combustion chamber is used for heating the heat exchanger, and the heat exchanger is connected with a water inlet pipe and a water outlet pipe;

the proportional valve is used for controlling the combustion flow entering the combustion chamber, an upper cavity and a lower cavity are arranged in the proportional valve, a gas passage is formed in the upper cavity, and a proportional valve vent is formed in the lower cavity;

one end of the back pressure pipe is connected with the proportional valve air port, and the other end of the back pressure pipe is connected with the combustion chamber pressure taking port.

In an example, the back pressure pipe is made of silica gel.

The example, proportional valve is including the casing that has the valve pocket, be provided with iron core, moving axis, regulating plate and involucra in the casing, the involucra will the valve pocket separates into go up cavity and lower cavity, the regulating plate is located do go up the cavity is internal, the regulating plate with be formed with the clearance that supplies the gas circulation between the shells inner wall, the iron core sets up in the lower cavity, the lower extreme of moving axis pass the involucra with iron core top butt, the moving axis upper end with the regulating plate is connected, the iron core receives the electric current size of proportional valve coil and reciprocates.

The example also comprises a fan, the fan is arranged below the combustion chamber, an air outlet of the fan is communicated with the combustion chamber, and the fan is used for blowing air into the combustion chamber.

Illustratively, the heat exchanger is arranged above the combustion chamber in a bent pipeline structure.

In an example, a smoke collecting hood is arranged at the top of the heat exchanger, and a smoke exhaust port is formed in one side, opposite to the heat exchanger, of the smoke collecting hood.

In an example, the system further comprises a controller, and the proportional valve, the fan and the burner are all connected with the controller.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model discloses in, get through the combustion chamber below the combustion chamber and add the back pressure pipe between pressure port and the proportional valve blow vent, this back pressure pipe can guarantee that the atmospheric pressure in the combustion chamber is balanced mutually with the atmospheric pressure of proportional valve blow vent, when having solved the jam, the gas heater load changes uncontrollably, the fume emission exceeds standard and neglects the defect of cold neglecting heat. In addition, the pressure taking port of the combustion chamber is arranged below the combustor, so that the temperature is low and the reliability is high; the last cavity coupling gas passageway of proportional valve, cavity under the proportional valve air vent connection, consequently, the proportional valve is got the pressure position and is not set up on gas passageway, can reduce the gas leakage risk, improves the stability of burning.

Drawings

Fig. 1 is a schematic view of a gas water heater with a back pressure pipe provided by the present invention;

fig. 2 is a cross-sectional view of a proportional valve of a gas water heater with a back pressure pipe provided by the present invention;

in the figure: 1. a combustion chamber; 11. a burner; 12. a combustion chamber pressure tap; 2. a proportional valve; 21. a housing; 22. an adjusting plate; 23. a moving shaft; 24. a skin membrane; 25. an iron core; 26. a gap; 27. a proportional valve vent; 28. a secondary pressure tapping port; 3. a back pressure pipe; 4. a fan; 5. a heat exchanger; 6. a smoke collecting hood; 7. a smoke outlet; 8. a water inlet pipe; 9. and (4) a water outlet pipe.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, when referring to the orientation or positional relationship indicated in the drawings, are used for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be considered as limiting the present application.

In the description of the present application, it is to be understood that 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 implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

As shown in fig. 1-2, for the utility model provides a gas water heater with back pressure pipe, include:

the combustion chamber 1 is internally provided with a combustor 11, the combustion chamber 1 is provided with a combustion chamber pressure taking port 12, and the combustion chamber pressure taking port 12 is positioned below the combustor 11;

the heat exchanger 5 is positioned above the combustion chamber 1, the combustion chamber 1 is used for heating the heat exchanger 5, and the heat exchanger 5 is connected with a water inlet pipe 8 and a water outlet pipe 9;

the proportional valve 2 is used for controlling the combustion flow entering the combustion chamber 1, an upper cavity and a lower cavity are arranged in the proportional valve 2, a gas passage is formed in the upper cavity, and a proportional valve vent 27 is arranged in the lower cavity;

and one end of the back pressure pipe 3 is connected with the proportional valve air port 27, and the other end of the back pressure pipe 3 is connected with the combustion chamber pressure taking port 12.

The utility model discloses in, proportional valve 2 is equipped with secondary pressure and gets pressure port 28, and secondary pressure gets pressure port 28 and sets up on gas channel, and the pressure that secondary pressure got pressure port 28 to correspond is secondary pressure. The corresponding relation between the load of the gas water heater and each pressure is deduced according to the test data as follows: the load is proportional to the proportional valve 2 electromagnetic induction force + the proportional valve vent 27 pressure- (combustion chamber 1 pressure + exhaust port pressure-secondary pressure); the load relationship of the gas water heater with the proportional valve 2 of the back pressure pipe 3 can be simplified as follows: the load is proportional to the electromagnetically induced force + the secondary pressure-the exhaust port pressure of the proportional valve 2, wherein the pressure change of the secondary pressure is comparable to the pressure change of the exhaust port, so that in the same construction the load is only related to the current of the proportional valve 2.

When the proportional valve 2 does not have the exhaust port 7 of the water heater of back pressure pipe 3 and is blocked, when the current of the proportional valve 2 is not changed, the pressure of the combustion chamber 1 is increased during the blocking, the air vent 27 of the proportional valve is communicated with the atmosphere, the atmospheric pressure is not changed, the opening of the adjusting plate 22 is reduced, according to the formula, the load is greatly reduced, the load of each section of the water heater is reduced, the superposition area of each section is insufficient or the gear-breaking condition is caused, and the water heater is cooled and heated suddenly. When the smoke outlet 7 of the water heater with the proportional valve 2 connected with the back pressure pipe 3 is blocked, the pressure of the combustion chamber 1 is increased, the combustion chamber 1 is communicated with the proportional valve air vent 27, the corresponding pressure is also increased, but the pressure difference is not changed, according to the formula, the load only fluctuates slightly (less than 3%), the load change of each section of the water heater is very small, each section still has enough overlapping area, and the water heater can keep constant temperature normally. Therefore, by additionally arranging the back pressure pipe 3 between the combustion chamber pressure taking port 12 and the proportional valve air port 27 below the combustion chamber 1, the back pressure pipe 3 can ensure that the air pressure in the combustion chamber 1 and the air pressure in the proportional valve air port 27 are balanced, and the defects that the load of a gas water heater is uncontrollably changed, the smoke emission exceeds the standard and the smoke is suddenly cooled and suddenly heated when the gas water heater is blocked are overcome. In the utility model, the combustion chamber pressure taking port 12 is arranged below the combustor 11, the temperature is low, and the reliability is high; the last cavity coupling gas passageway of proportional valve 2, cavity under proportional valve blow vent 27 is connected, consequently, proportional valve 2 fetches the pressure the position and does not set up on gas passageway, can reduce the gas leakage risk, improves the stability of burning.

In this embodiment, when the burner 11 is ignited for combustion, the high-temperature flue gas generated by the burner 11 transfers heat to the heat exchanger 5 to heat the heat exchanger 5, the flowing water passes through the water inlet pipe 8, the heat exchanger 5 and the water outlet pipe 9 in sequence, and the water flow exchanges heat when passing through the heat exchanger 5, so that the temperature of the cold water is increased due to heat absorption, and the hot water with the increased temperature is discharged from the water outlet pipe 9.

In a preferred embodiment, the back pressure pipe 3 is made of a silicone material. The silica gel material has better temperature resistance, so that the silica gel material is more durable.

As a preferred embodiment, the proportional valve 2 includes a housing 21 having a valve cavity, an iron core 25, a moving shaft 23, an adjusting plate 22 and a coating 24 are disposed in the housing 21, the coating 24 separates the valve cavity into an upper cavity and a lower cavity, the adjusting plate 22 is disposed in the upper cavity, a gap 26 for gas to flow is formed between the adjusting plate 22 and the inner wall of the housing 21, the iron core 25 is disposed in the lower cavity, the lower end of the moving shaft 23 passes through the coating 24 and abuts against the top of the iron core 25, the upper end of the moving shaft 23 is connected with the adjusting plate 22, and the iron core 25 moves up and down due to the current of the coil of the proportional valve 2.

In the present embodiment, the load of the gas water heater depends on the relative position of the regulating plate 22 and the housing 21, and the longer the distance between them, the greater the load of the gas water heater, and vice versa. The iron core 25 is moved up and down by the current of the coil of the proportional valve 2, and then drives the moving shaft 23 which is close to the iron core 25, thereby affecting the gap 26 between the adjusting plate 22 and the housing 21.

In a preferred embodiment, the combustion chamber air-conditioning system further comprises a fan 4, wherein the fan 4 is arranged below the combustion chamber 1, an air outlet of the fan 4 is communicated with the combustion chamber 1, and the fan 4 is used for blowing air into the combustion chamber 1 and controlling the amount of blown air. In this embodiment, when the resistance of the exhaust port 7 of the water heater is increased, the current of the fan 4 is generally increased, so that the rotating speed of the fan 4 is increased, and the effect of quickly removing waste gas is achieved; when no back pressure pipe 3 is arranged, the load of the water heater is reduced and the rotating speed of the fan 4 is increased, so that flame is easy to break away from a fire hole, and gas cannot be fully combusted, so that the smoke emission exceeds the standard. And the utility model discloses an add back pressure pipe 3, after improving 4 rotational speeds of fan, atmospheric pressure in the combustion chamber 1 still is in a balanced state, and 2 electric currents of proportional valve are unchangeable, and the air input also maintains unchangeably, consequently can avoid the problem that the fume emission exceeds standard.

In a preferred embodiment, the heat exchanger 5 is disposed above the combustion chamber 1 in a bent pipe structure. This may improve the time for heat exchange.

As a preferred embodiment, a smoke collecting hood 6 is arranged at the top of the heat exchanger 5, and a smoke exhaust port 7 is arranged on one side of the smoke collecting hood 6 opposite to the heat exchanger 5. The fume collecting hood 6 collects the fume after heat exchange with the heat exchanger 5 and discharges the fume from the fume discharge port 7, so that the fume is guided and collected, and the fume generated by the gas water heater is discharged quickly and orderly.

As a preferred embodiment, the system further comprises a controller, and the proportional valve 2, the fan 4 and the burner 11 are all connected with the controller. The controller controls the proportional valve 2, the fan 4 and the burner 11 to be started and closed, so that constant-temperature hot water supply under various conditions can be met, the best combustion quality can be achieved, and full-automatic constant-temperature control can be achieved.

In the detailed description of the embodiments, various technical features may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The detailed description of the above embodiments only expresses several embodiments of the present invention, and the description thereof is more specific and detailed, but should not be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a take gas heater of back pressure pipe which characterized in that includes:

the combustion chamber (1) is internally provided with a combustor (11), the combustion chamber (1) is provided with a combustion chamber pressure taking port (12), and the combustion chamber pressure taking port (12) is positioned below the combustor (11);

the heat exchanger (5) is positioned above the combustion chamber (1), the combustion chamber (1) is used for heating the heat exchanger (5), and the heat exchanger (5) is connected with a water inlet pipe (8) and a water outlet pipe (9);

the proportional valve (2) is used for controlling the combustion flow entering the combustion chamber (1), an upper cavity and a lower cavity are arranged in the proportional valve (2), a gas passage is formed in the upper cavity, and a proportional valve vent (27) is arranged in the lower cavity;

one end of the back pressure pipe (3) is connected with the proportional valve air port (27), and the other end of the back pressure pipe (3) is connected with the combustion chamber pressure taking port (12).

2. Gas water heater with back pressure pipe according to claim 1, characterized in that the back pressure pipe (3) is of silica gel material.

3. Gas water heater with back pressure pipe according to claim 1, characterized in that the proportional valve (2) comprises a housing (21) with a valve cavity, an iron core (25), a moving shaft (23), an adjusting plate (22) and a coating (24) are arranged in the shell (21), the valve cavity is divided into an upper cavity and a lower cavity by the membrane (24), the adjusting plate (22) is positioned in the upper cavity, a gap (26) for gas to flow is formed between the adjusting plate (22) and the inner wall of the shell (21), the iron core (25) is arranged in the lower cavity, the lower end of the moving shaft (23) penetrates through the coating (24) to be abutted against the top of the iron core (25), the upper end of the moving shaft (23) is connected with the adjusting plate (22), and the iron core (25) moves up and down under the action of the current of the coil of the proportional valve (2).

4. Gas water heater with back pressure pipe according to claim 1, further comprising a fan (4), wherein said fan (4) is arranged below the combustion chamber (1), the air outlet of said fan (4) is communicated with said combustion chamber (1), and said fan (4) is used for blowing air into the combustion chamber (1).

5. Gas water heater with back pressure pipe according to claim 1, characterized in that the heat exchanger (5) is arranged in a bent pipe structure above the combustion chamber (1).

6. A gas water heater with back pressure pipe according to claim 1, characterized in that the top of the heat exchanger (5) is provided with a smoke collecting hood (6), and one side of the smoke collecting hood (6) opposite to the heat exchanger (5) is provided with a smoke exhaust (7).

7. A gas water heater with back pressure pipe according to any of claims 1-6, characterized in that it further comprises a controller, to which the proportional valve (2), the fan (4) and the burner (11) are connected.