CN218787350U

CN218787350U - Double-control gas proportional valve for gas water heater

Info

Publication number: CN218787350U
Application number: CN202222750389.4U
Authority: CN
Inventors: 叶飞
Original assignee: Hangzhou Qiangbang Precision Machinery Electrical Co ltd
Current assignee: Hangzhou Qiangbang Precision Machinery Electrical Co ltd
Priority date: 2022-10-18
Filing date: 2022-10-18
Publication date: 2023-04-04
Anticipated expiration: 2032-10-18

Abstract

The utility model discloses a gas water heater is with two accuse gas proportional valves, including the air inlet and the gas outlet in main wind channel to and be used for the main valve core in switching main wind channel, still include secondary wind channel, secondary wind channel's income wind gap is connected with servo stop valve, secondary wind channel's the end just is located the main valve core lower extreme for the blind mouth, the blind mouth is elastic structure towards main valve core one side. When the hot water boiler is started, the fan is directly controlled to be started to the rotating speed matched with the specified air pressure, so that the air pressure at the blind opening is increased after air enters the secondary air duct, the main valve core is supported by the expansion of the elastic structure, the purpose of quickly opening the main valve core to supply air and burn is achieved, and the hot water outlet efficiency is higher.

Description

Double-control gas proportional valve for gas water heater

Technical Field

The utility model relates to a gas valve field, concretely relates to use automatically controlled and gas accuse gas proportional valve of two accuses on gas heater.

Background

The gas proportional valve is applied to heating and water heating devices such as gas heating furnaces, gas dual-purpose furnaces, gas water heaters and the like. When the existing gas water heater is used, because the traditional moving iron type gas proportional valve has too large return difference and insensitive reaction, sometimes the problem that the adjustment is not rapid enough after an instruction is issued by an electric controller is solved, and particularly, the defect is more obvious when the servo proportional valve adopts a starting mode which belongs to a small valve linkage large valve, so that the specified current and the gas pressure are adjusted for too long time, and the requirement of rapidly discharging hot water cannot be met.

For example, a "dual pressure control proportional valve and control method" disclosed in chinese patent literature is disclosed in CN109114225B, in which a main valve body is provided with a servo inlet channel having one end communicating with a main inlet channel, and a servo outlet channel having one end located under a membrane of the main proportional valve and the other end communicating with an outlet of the servo proportional valve, a stable gas output pressure is controlled by the main proportional valve and the servo proportional valve, a large output flow pressure of the main proportional valve is controlled by a small output flow pressure of the servo proportional valve, and the main proportional valve is controlled by an electric control, so that the main proportional valve cannot be quickly actuated in an interlocking manner at the initial actuation, resulting in a slow hot water discharge.

SUMMERY OF THE UTILITY MODEL

In order to overcome among the prior art gas proportional valve start-up time overlength, unable rapid combustion goes out hydrothermal problem, the utility model provides a can open the gas proportional valve of valve burning, reach the rapid combustion state immediately.

The utility model discloses a realize through following technical scheme: a double-control gas proportional valve for a gas water heater comprises a gas inlet and a gas outlet of a main air duct, a main valve core for opening and closing the main air duct and a secondary air duct, wherein a gas inlet of the secondary air duct is connected with a servo stop valve, the tail end of the secondary air duct is a blind opening and is located at the lower end of the main valve core, and one side of the blind opening, facing the main valve core, is of an elastic structure.

When the air pressure control valve is started, the servo stop valve is opened, the fan is directly controlled to be started to reach the rotating speed matched with the specified air pressure, the air pressure at the blind opening is increased after air enters the secondary air duct, the elastic structure expands to support the main valve core, and the purpose of quickly opening the main valve core to supply air and burn is achieved. Because this gas proportional valve direct control fan rotational speed when starting for the reaction of opening of main valve core is more sensitive, thereby has shortened the gas from starting to the time of high-power burning, makes out the hot water efficiency higher.

Preferably, the air conditioner further comprises a pressure stabilizing channel, one end of the pressure stabilizing channel is communicated with the secondary air channel, the other end of the pressure stabilizing channel is communicated with one end, close to the air outlet, of the main air channel, the secondary air channel is further provided with a servo proportional valve which can be pushed open by air pressure, and the servo proportional valve is located at the downstream of the communication position of the pressure stabilizing channel and the secondary air channel.

When the air pressure exceeds a set value, the air can be discharged from the pressure stabilizing channel to the air outlet of the main air duct, so that the damage caused by the overlarge air pressure at the blind opening is avoided; when the air pressure is insufficient, the opening of the servo proportional valve is reduced, and the air flow rate is slowed down, so that the air pressure is increased to reach a set value.

Preferably, the servo proportional valve is communicated with a pneumatic pressure regulating port, the pneumatic pressure regulating port can receive external input air pressure, and the air pressure required by jacking the servo proportional valve to a specified size is set through regulating the external input air pressure, so that the air pressure value at the blind hole is controlled.

Preferably, the main air duct is further provided with a main stop valve, and the main stop valve is located at the upstream of the servo stop valve and used for controlling air to enter the gas proportional valve from an air inlet of the main air duct.

Preferably, the air inlet is provided with an air inlet pressure measuring port communicated with the air inlet and used for measuring air pressure at the air inlet.

Preferably, the air outlet is provided with an air outlet pressure measuring port communicated with the air outlet and used for measuring air pressure at the air outlet.

Preferably, the blind port is provided with a diaphragm structure on a side facing the main valve element, and the main valve element is supported by air pressure by the diaphragm structure as an elastic structure.

Preferably, the main valve element is provided with a fixed main valve element seat, and an elastic element is arranged between the main valve element and the main valve element seat, so that the main valve element seals the main air duct in a closed state.

Compared with the prior art, the utility model has the advantages that:

when the valve is started, the main valve core of the fuel gas proportional valve is directly acted by wind pressure to finish the process of quick adjustment, so that the opening reaction of the main valve core is more sensitive, the time from starting to high-power combustion of fuel gas is shortened, and the hot water discharging efficiency is higher; the current regulation only plays a role of auxiliary regulation, and the problem of insufficient precision regulation caused by the interference of current fluctuation on the controller is avoided.

Drawings

Fig. 1 is a perspective view of an embodiment of the present invention;

fig. 2 is a schematic side view of a first embodiment of the present invention;

FIG. 3 isbase:Sub>A schematic cross-sectional view taken at A-A in FIG. 2;

fig. 4 is a schematic view of the internal structure and the airflow direction when the main valve element of the embodiment of the present invention is closed;

fig. 5 is a schematic view illustrating an internal structure and an airflow direction when the main valve element is opened according to an embodiment of the present invention.

In the figure: the main air duct comprises a main air duct 1, an air inlet 11, an air outlet 12, a main valve core 2, a main valve core seat 21, an elastic piece 22, a secondary air duct 3, a blind hole 31, a membrane structure 32, a servo stop valve 4, a pressure stabilizing channel 5, a main stop valve 6, an air inlet pressure measuring port 7, an air outlet pressure measuring port 8, a servo proportional valve 9 and a pneumatic pressure regulating port 10.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the functions of the present invention easy to understand and understand, how to implement the present invention is further explained below with reference to the accompanying drawings and the detailed description.

In a first embodiment, as shown in fig. 1 to 5, a dual control gas proportional valve for a gas water heater includes:

the air conditioner comprises a main air duct 1, wherein the main air duct is provided with an air inlet 11 and an air outlet 12;

the main valve core 2 is used for opening and closing the main air duct 1;

the air inlet of the secondary air duct 3 is connected with a servo stop valve 4, the tail end of the secondary air duct 3 is a blind port 31 and is positioned at the lower end of the main valve element 2, and a membrane structure 32 is arranged on one side, facing the main valve element 2, of the blind port 31;

one end of the pressure stabilizing channel 5 is communicated with the secondary air channel 3, and the other end of the pressure stabilizing channel 5 is communicated with one end of the main air channel 1 close to the air outlet 1;

the main stop valve 6 is positioned at the upstream of the servo stop valve 4 and used for controlling air to enter the gas proportional valve from the air inlet of the main air duct 1;

an intake pressure measuring port 7 communicating with the intake port 11 and measuring an air pressure at the intake port 11;

and the air outlet pressure measuring port 8 is communicated with the air outlet 1 and is used for measuring the air pressure at the air outlet 1.

In addition, the secondary air duct 3 is provided with a servo proportional valve 9 which can be opened by wind pressure, and the servo proportional valve 9 is positioned at the downstream of the communication position of the pressure stabilizing channel 5 and the secondary air duct 3.

In addition, the servo proportional valve 9 is communicated with a pneumatic pressure regulating port 10, the pneumatic pressure regulating port 10 can receive external input air pressure, and the air pressure required by jacking the servo proportional valve 9 to a specified size is set by regulating the external input air pressure, so that the air pressure value at the blind hole 31 is controlled.

Further, the blind port 31 is provided with a diaphragm structure 32 on the side facing the main valve element 2, and the main valve element 2 is supported by air pressure by the diaphragm structure 32 as an elastic structure.

Furthermore, main valve element 2 is provided with a fixed main valve element seat 21, and an elastic element 22 is arranged between main valve element 2 and main valve element seat 21, so that main valve element 2 seals main air duct 1 in the closed state.

When the air pressure control valve is started, as shown in fig. 4 and 5, the main stop valve 6 and the servo stop valve 4 are opened, the fan is directly controlled to be started to the rotating speed matched with the specified air pressure, the air pressure at the blind port 31 is increased after air enters the secondary air duct 3, the diaphragm structure 32 expands to support the main valve element 2, and the purpose of quickly opening the main valve element 2 for air supply and combustion is achieved.

The air pressure control principle in the secondary air duct 3 is that after air flow is introduced into the secondary air duct 3, the servo proportional valve 9 is jacked open under the action of air pressure so as to flow into the blind port 31, when the air pressure exceeds a set value, the air can be discharged from the pressure stabilizing channel 5 to the air outlet of the main air duct 1, and damage caused by overlarge air pressure at the blind port 31 is avoided; when the air pressure is insufficient, the opening of the servo proportional valve 9 becomes small, and the air flow rate becomes slow, so that the air pressure increases to reach a set value.

Because this gas proportional valve directly controls fan rotational speed when starting for main valve element 2's the reaction of opening is more sensitive, thereby has shortened the gas from starting to the time of high-power burning, makes out hot water efficiency higher.

Claims

1. The double-control gas proportional valve for the gas water heater comprises a gas inlet and a gas outlet of a main air duct, and a main valve core for opening and closing the main air duct, and is characterized by further comprising a secondary air duct, wherein a wind inlet of the secondary air duct is connected with a servo stop valve, the tail end of the secondary air duct is a blind opening and is located at the lower end of the main valve core, and one side, facing the main valve core, of the blind opening is of an elastic structure.

2. The double control gas proportional valve for the gas water heater according to claim 1, wherein: still include steady voltage passageway, steady voltage passageway one end intercommunication secondary wind channel, the one end that the other end intercommunication main air duct is close to the gas outlet, secondary wind channel still is provided with the servo proportional valve that can be backed down by the wind pressure, servo proportional valve is located the low reaches of steady voltage passageway and secondary wind channel intercommunication department.

3. The double control gas proportional valve for the gas water heater according to claim 2, wherein: the servo proportional valve is communicated with a pneumatic pressure regulating port, and the pneumatic pressure regulating port can receive external input air pressure.

4. The double control gas proportional valve for the gas water heater according to claim 1 or 2, wherein: the main air duct is also provided with a main stop valve, and the main stop valve is positioned at the upstream of the servo stop valve.

5. The double control gas proportional valve for the gas water heater according to any one of claims 1 or 2, wherein: and an air inlet pressure measuring port communicated with the air inlet is arranged at the air inlet.

6. The double control gas proportional valve for the gas water heater according to claim 1 or 2, wherein: and the air outlet is provided with an air outlet pressure measuring port communicated with the air outlet.

7. The double control gas proportional valve for the gas water heater according to any one of claims 1 or 2, wherein: and a leather membrane structure is arranged on one side of the blind opening, which faces the main valve core.

8. The double control gas proportional valve for the gas water heater according to any one of claims 1 or 2, wherein: the main valve core is provided with a fixed main valve core seat, and an elastic part is arranged between the main valve core and the main valve core seat.