CN110057105B

CN110057105B - Gas water heater

Info

Publication number: CN110057105B
Application number: CN201810052460.7A
Authority: CN
Inventors: 张肃; 李清; 李忠华; 彭少华; 程杰锋
Original assignee: Midea Group Co Ltd
Current assignee: Midea Group Co Ltd; Guangdong Midea White Goods Technology Innovation Center Co Ltd
Priority date: 2018-01-19
Filing date: 2018-01-19
Publication date: 2020-09-25
Anticipated expiration: 2038-01-19
Also published as: CN110057105A

Abstract

The invention provides a gas water heater which comprises a shell, a smoke tube, a combustion chamber, a drainage device and a fan. A sealed cavity is arranged in the shell, and a drainage port is formed in the shell; the smoke tube is arranged in the self-sealing cavity and extends outwards from the shell, and comprises an air inlet channel and an air outlet channel; the combustion chamber is arranged in the sealed cavity and communicated with the exhaust channel so as to discharge combustion waste gas out of the shell; the drainage device is arranged at the drainage port and is fixed on the shell; the drainage device can drain air outside the shell to flow into the sealed cavity through the drainage device and simultaneously can prevent gas in the shell from flowing out of the shell through the drainage device; the fan is arranged in the sealed cavity and used for conveying air entering the sealed cavity through the air inlet channel and the drainage device into the combustion chamber. According to the gas water heater, the air flowing in from the drainage device increases the air supply amount in the air duct of the fan, so that sufficient oxygen is continuously provided for combustion, the combustion oscillation phenomenon is effectively inhibited, and the noise reduction effect is achieved.

Description

Gas water heater

Technical Field

The invention relates to the technical field of electric appliance manufacturing, in particular to a gas water heater with a noise reduction function.

Background

The forced air supply and exhaust type gas water heater is a common gas water heater, the whole machine of the forced air supply and exhaust type gas water heater is closed, a cavity is formed inside the forced air supply and exhaust type gas water heater, and air inlet and smoke exhaust are realized through double-layer smoke pipes. The whole cavity of the forced-ventilated type gas water heater and the smoke tube system form a closed flow channel, and the natural frequency of the closed flow channel is close to the natural frequency of the smoke tube system. However, combustion oscillation is easily generated due to combustion in the closed space, and the combustion oscillation can disturb air in the closed space; if the frequency of the combustion oscillation is close to the natural frequency of the runner system, a strong combustion oscillation phenomenon is easily induced, which is represented by severe vibration of a front operation panel of the gas water heater, and even is easy to cause dead fire and bring about dangers of gas leakage and the like.

The mechanism by which this combustion oscillation occurs is: air rapidly expands due to violent combustion, and the expanded air can generate negative pressure on an air duct of the fan, so that insufficient air inlet is caused, and the oxygen content is reduced; and then, the combustion heat release also drops rapidly, the air is cooled and contracted, positive pressure is generated on the air duct system, the air supply amount is increased, the combustion starts to be severe again, the air expansion is caused, and when the natural frequency and the combustion oscillation frequency of the cavity in the air duct system are very close, the system combustion state is caused to repeat, namely, the process is circulated, so that the combustion oscillation is induced.

For the forced air supply and exhaust type gas water heater, the cavity of the water heater is closed, so the invention of the gas water heater which can avoid the combustion oscillation phenomenon and the noise problem caused by the combustion oscillation phenomenon is urgently needed.

Disclosure of Invention

In order to solve the above technical problems, the present invention provides a gas water heater to solve the problems of the prior art, such as the occurrence of combustion oscillation, and the generation of loud noise.

In order to solve the technical problem, the invention provides a gas water heater, which comprises: casing, tobacco pipe, combustion chamber, drainage device and fan. A sealed cavity is arranged in the shell, and a drainage port is formed in the shell; the smoke tube extends out of the shell from the inside of the sealed cavity and comprises an air inlet channel and an air outlet channel; the combustion chamber is arranged in the sealed cavity and communicated with the exhaust channel so as to discharge waste gas combusted by the combustion chamber out of the shell; the drainage device is arranged at the drainage port of the shell and is fixed on the shell; the drainage device can drain air outside the shell into the sealed cavity of the shell and simultaneously can prevent gas in the shell from flowing out of the shell; and the fan is arranged in the sealed cavity and used for conveying the air entering the sealed cavity through the air inlet channel and the drainage device into the combustion chamber.

In a preferred embodiment, the drainage port on the housing is disposed near the blower.

In a preferred aspect, the drainage device comprises: a one-way air inlet valve with one-way ventilation; the air inlet end of the one-way air inlet valve is arranged outwards relative to the shell; the one-way air inlet valve has an opening threshold and a closing threshold, and when the pressure in the housing reaches the opening threshold, the one-way air inlet valve can be automatically opened to introduce outside air into the housing; when the pressure in the housing reaches the closing threshold, the one-way intake valve can automatically close to stop the introduction of outside air into the housing.

In a preferred aspect, the drainage device further comprises: the one-way air inlet valve is arranged on the drainage port through the mounting plate; the mounting panel is followed the circumference of one-way admission valve extends the setting, the outward flange of mounting panel with drainage mouth adaptation.

In a preferable scheme, the outer edge of the mounting plate is provided with a sealing frame.

In a preferred embodiment, the mounting plate is mounted on the drainage port within the housing.

In a preferred embodiment, the housing has a rectangular parallelepiped structure, and includes: an outer panel, a back panel, and two opposing side panels connected between the outer panel and the back panel; the fan is located the lower part in the casing and is close to one the side panel sets up, the drainage mouth is located close to on the side panel of fan.

In a preferred scheme, the tobacco pipe is a double-layer tobacco pipe, and comprises: the exhaust device comprises an inner pipeline and an outer pipeline sleeved outside the inner pipeline, wherein a channel in the inner pipeline forms an exhaust channel; the channel between the outer pipeline and the inner pipeline forms the air inlet channel, and the air inlet channel is communicated with the air outside the shell and the sealed cavity.

Compared with the prior art, the invention has the following beneficial effects: according to the gas water heater, the drainage device is arranged, so that air outside the shell can be conveyed into the sealed cavity from the air inlet channel and can also flow into the sealed cavity through the drainage device, the air flowing in from the drainage device increases the air supply amount in the air duct of the fan, sufficient oxygen is continuously provided for combustion, the combustion oscillation phenomenon is effectively inhibited, and the noise reduction effect is achieved. Simultaneously, because the drainage device has one-way gas circulation function, the gas in the casing can not follow the drainage device and outwards flow through to the casing, has avoided leaking because of the gas and has polluted indoor environment to and leak other dangerous problems that take place because of the gas.

Drawings

Fig. 1 is a schematic structural diagram of the gas water heater of the embodiment.

Fig. 2 is a schematic structural view of another angle of the gas water heater of the embodiment.

Fig. 3 is a schematic structural view of the assembly of the casing part structure and the drainage device of the embodiment.

Fig. 4 is a schematic view of the drainage device of the embodiment in an exploded structure mounted on the shell.

The reference numerals are explained below: 2. a housing; 21. a drainage opening; 201. an outer panel; 203. a side panel; 204. a side panel; 205. a top panel; 206. a bottom panel; 3. a smoke pipe; 4. a combustion chamber; 5. a drainage device; 51. a one-way intake valve; 52. mounting a plate; 53. sealing the frame; 6. a fan.

Detailed Description

Exemplary embodiments that embody features and advantages of the invention are described in detail below in the specification. It is to be understood that the invention is capable of other embodiments and that various changes in form and details may be made therein without departing from the scope of the invention and the description and drawings are to be regarded as illustrative in nature and not as restrictive.

Referring to fig. 1 to 4, the gas water heater provided in the present embodiment is adapted to a forced-air-supply/exhaust gas water heater, and includes: the device comprises a shell 2, a smoke pipe 3, a combustion chamber 4, a drainage device 5 and a fan 6. A sealed cavity is arranged in the shell 2, and a drainage port 21 is arranged on the shell 2. The smoke tube 3 extends from the inside of the self-sealing cavity to the outside of the shell 2 and comprises an air inlet channel and an air outlet channel. The combustion chamber 4 is provided in the sealed cavity, which communicates with the exhaust passage to discharge combustion exhaust gas to the outside of the housing 2. The drainage device 5 is arranged at the drainage port 21 of the shell 2 and is fixed on the shell 2; the drainage device 5 can drain air outside the housing 2 into the sealed cavity of the housing 2 through the drainage device, and can simultaneously block gas inside the housing 2 from flowing out of the housing 2 through the drainage device. A fan 6 is arranged in the sealed cavity of the housing 2, the fan 6 being arranged to convey air entering the sealed cavity via the air inlet channel and the flow guiding means 5 into the combustion chamber 4.

The gas heater of this embodiment is through setting up drainage device for the outer air of casing can enough be carried to sealed cavity in from inlet channel, also can flow into sealed cavity through drainage device in, this air that flows in by drainage device has increased the air supply volume in the fan wind channel, thereby continuously provides sufficient oxygen for the burning, effectively suppresses the emergence of burning oscillation phenomenon, plays the effect of making an uproar of falling simultaneously. Simultaneously, because the drainage device has one-way gas circulation function, the gas in the casing can not follow the drainage device and outwards flow through to the casing, has avoided leaking because of the gas and has polluted indoor environment to and leak other dangerous problems that take place because of the gas.

Specifically, the housing 2 is a rectangular parallelepiped structure, which includes: an outer panel 201, a back panel (not shown), two

opposing side panels

203, 204 connected between the outer panel 201 and the back panel, and a top panel 205 and a bottom panel 206. The back panel is a mounting panel of the water heater, and is arranged towards the wall; the outer panel 201 is disposed outward, and an operation panel and a display panel are disposed thereon, so as to facilitate operation and viewing by a person. The drainage port 21 is provided at the lower portion of the side panel 203, and has a rectangular opening.

In practical use, the shape of the drainage opening 21 is not limited to a rectangle, and may be other shapes, which are not limited herein.

The smoke tube 3 is a double-layer smoke tube, extends outwards through the top panel 205 and extends out of the housing 2, and comprises: the exhaust device comprises an inner pipeline and an outer pipeline sleeved outside the inner pipeline, wherein a channel in the inner pipeline forms an exhaust channel; the passage between the outer and inner ducts constitutes an air intake passage which communicates air outside the housing 2 with the sealed cavity so that air outside the housing 2 enters the housing 2 therethrough. It should be noted that the smoke tube 3 is connected to the outside and completely separated from the inside, so as to prevent air pollution in the bathroom and danger caused by waste gas or oxygen deficiency.

The combustion chamber 4 is provided in the middle upper portion in the casing 2.

Referring to fig. 4, the drainage device 5 includes: one-way intake valve 51, mounting plate 52 and sealing rim 53.

Which are all matched with the drainage openings 21 on the inner side surface of the side panel 203 of the shell 2.

The one-way air intake valve 51 has a one-way ventilation function, and when it is installed on the housing 2, its inlet end is disposed outward to guide the outside air into the housing 2 and block the air in the housing 2 from flowing out of the housing 2.

Specifically, the one-way intake valve 51 of the present embodiment has an opening threshold and a closing threshold, and when the pressure in the housing 2 reaches the opening threshold, the one-way intake valve 51 can be automatically opened to introduce the outside air into the housing 2; when the pressure inside the casing 2 reaches the closing threshold, the one-way intake valve 51 can automatically close to stop the introduction of the outside air into the casing 2.

In practical use, the opening and closing of the one-way intake valve 51 can also be controlled electronically, which is not limited herein.

The mounting plate 52 extends along the circumference of the one-way air intake valve 51, and the outer edge of the mounting plate 52 is fitted with the drainage port 21, so that the one-way air intake valve 51 is mounted on the drainage port 21 of the housing 2 through the mounting plate 52. Specifically, the mounting plate 52 of the present embodiment is rectangular, and has a mounting hole in the middle thereof, where the one-way intake valve 51 is mounted; and the mounting plate 52 is mounted to the vent 21 with the housing 2.

The sealing frame 53 is a square frame, which is disposed along the outer edge of the mounting plate 52 and is attached to the inner surface of the side panel 203 outside the area of the drainage opening 21 to enhance the sealing performance of the connection between the mounting plate 52 and the housing 2.

The drainage device 5 in this embodiment can be installed on the drainage port 21 by welding; preferably, the vent 21 can be detachably mounted, such as with bolts, screws, etc., for later disassembly and maintenance.

In practice, the shape of the mounting plate 52 and the sealing frame 53 is not limited to the rectangular shape in the present embodiment, but may be other shapes, so that both can be fitted to the drainage port 21 and can seal the drainage port 21.

In other embodiments, the sealing rim 53 may be omitted.

In other embodiments, the side panel 203 may further have a curled edge at the edge of the drainage opening 21, and the sealing frame 53 has a clamping portion around the curled edge for fixedly connecting the two by clamping.

In other embodiments, the mating assembly of mounting plate 52 and sealing rim 53 may also be mounted to the outer surface of side panel 203 for mating connection with vent 21.

The fan 6 is provided with an air inlet which is arranged towards the back panel; the fan 6 of the present embodiment is located at the lower portion inside the casing 2; preferably, the fan 6 is disposed close to the side panel 203, so that the fan is disposed close to the drainage device 5, and air drained into the sealed cavity by the drainage device 5 is conveniently conveyed to an air inlet of the fan 6, enters an air duct of the fan after passing through the air inlet, and is finally conveyed to the combustion chamber 4.

In the embodiment, the drainage port 21 on the housing 2 may be opened at other positions so as to be close to the blower 6.

In actual use, the drainage device 5 can also be arranged at a position far away from the fan 6, so that the drainage device 5 can drain the air outside the shell 2 to the air inlet of the fan 6.

The drainage device 5 of this embodiment simple structure only at drainage mouth 21 on casing 2 to the one-way admission valve 51 that sets up to have one-way ventilative function can effectively solve because of the not enough burning oscillation problem that induces of support, and the acceleration of test panel vibration descends about 95%.

While the present invention has been described with reference to the above exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims

1. A gas water heater, comprising:

the drainage device comprises a shell, a drainage pipe and a drainage pipe, wherein a sealed cavity is formed in the shell;

the smoke pipe extends out of the shell from the inside of the sealed cavity and comprises an air inlet channel and an air outlet channel;

the combustion chamber is arranged in the sealed cavity and communicated with the exhaust channel so as to discharge waste gas combusted by the combustion chamber out of the shell;

the drainage device is arranged at the drainage port of the shell and is fixed on the shell; the drainage device can drain air outside the shell to flow into the sealed cavity of the shell through the drainage device and can simultaneously prevent the air in the shell from flowing out of the shell through the drainage device, and the drainage device comprises a one-way air inlet valve with one-way ventilation; the air inlet end of the one-way air inlet valve is arranged outwards relative to the shell; the one-way air inlet valve has an opening threshold and a closing threshold, and when the pressure in the housing reaches the opening threshold, the one-way air inlet valve can be automatically opened to introduce outside air into the housing; when the pressure in the shell reaches the closing threshold value, the one-way air inlet valve can be automatically closed to stop introducing the outside air into the shell;

and the fan is arranged in the sealed cavity and used for conveying air entering the sealed cavity through the air inlet channel and the drainage device into the combustion chamber.

2. The gas water heater of claim 1, wherein said vent opening in said housing is positioned adjacent said fan.

3. The gas water heater of claim 1, wherein said flow directing means further comprises: the one-way air inlet valve is arranged on the drainage port through the mounting plate;

the mounting panel is followed the circumference of one-way admission valve extends the setting, the outward flange of mounting panel with drainage mouth adaptation.

4. The gas water heater of claim 3, wherein the mounting plate has a sealing rim at its outer edge.

5. The gas water heater of claim 4, wherein said mounting plate is mounted on said vent opening within said housing.

6. The gas water heater of claim 1, wherein said housing is a rectangular parallelepiped structure comprising: an outer panel, a back panel, and two opposing side panels connected between the outer panel and the back panel;

the fan is located the lower part in the casing and is close to one the side panel sets up, the drainage mouth is located close to on the side panel of fan.

7. The gas water heater of claim 1, wherein said flue is a double-layer flue comprising: the exhaust device comprises an inner pipeline and an outer pipeline sleeved outside the inner pipeline, wherein a channel in the inner pipeline forms an exhaust channel; the channel between the outer pipeline and the inner pipeline forms the air inlet channel, and the air inlet channel is communicated with the air outside the shell and the sealed cavity.