CN210485713U - Venturi device and gas equipment - Google Patents

Abstract

The utility model discloses a venturi device and gas equipment, the venturi device includes: the gas flow channel is divided into a gas flow channel and an air flow channel, and the gas flow channel is communicated with an outlet of the air flow channel; and the valve is arranged in the gas flow channel and is used for selectively cutting off a part of the fuel gas flow channel and/or the air flow channel. According to the utility model discloses venturi device cuts a part of gas runner and/or air runner through the valve selectivity in the airflow channel to air quantity and the gas volume that control got into in the gas runner obtains the air-fuel ratio of preferred, satisfies the different load demands of gas equipment.

Description

Venturi device and gas equipment

Technical Field

The utility model relates to a water heater technical field, more specifically relates to a venturi device and gas equipment.

Background

The venturi device in the related art cannot effectively adjust gas and air, has a small combustion adjustment ratio, and cannot meet gas equipment with different load requirements.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of above-mentioned technical problem to a certain extent at least.

Therefore, the utility model provides a venturi device, this venturi device's air-fuel ratio is good, the commonality is strong.

The utility model discloses still provide a gas equipment with above-mentioned venturi device, this gas equipment combustion efficiency is high.

According to the utility model discloses a venturi device, include: the gas flow channel is divided into a gas flow channel and an air flow channel, and the gas flow channel is communicated with an outlet of the air flow channel; and the valve is arranged in the gas flow channel and is used for selectively cutting off a part of the fuel gas flow channel and/or the air flow channel.

According to the utility model discloses venturi device cuts a part of gas runner and/or air runner through the valve selectivity in the airflow channel to air quantity and the gas volume that control got into in the gas runner obtains the air-fuel ratio of preferred, satisfies the different load demands of gas equipment.

According to some embodiments of the invention, the gas flow channel is divided into a normally closed gas flow channel and a normally open gas flow channel, and/or the air flow channel is divided into a normally closed air flow channel and a normally open air flow channel.

In an alternative embodiment, a first annular structure and a second annular structure are arranged in the gas flow passage, the first annular structure defines the normally closed gas flow passage and the normally closed air flow passage, and the second annular structure defines the normally open gas flow passage and the normally open air flow passage.

In an alternative embodiment, the valve is rotatable relative to the first ring-shaped structure by wind power, the range of rotation being between 0 and 90 °.

In a further alternative embodiment, the end face of the second annular structure extends beyond the end face of the first annular structure.

In a further alternative embodiment, the end surface of the first annular structure is inclined from the inside to the outside.

In an alternative embodiment, the first ring-shaped structure comprises: the device comprises a first annular barrel and a first tubular column arranged in the first annular barrel, wherein a normally closed air flow channel is defined by the inner wall of the first annular barrel and the outer wall of the first tubular column, and a normally closed fuel gas flow channel is defined by the first tubular column; the second annular structure comprises: the normally open air flow passage is defined by the inner wall of the second annular cylinder and the outer wall of the second tubular column, and the normally open fuel gas flow passage is defined by the second tubular column.

In some embodiments of the present invention, the housing includes an upper shell and a lower shell, the upper shell defines an installation cavity and is provided with a gas supply channel and an air supply channel, wherein the gas supply channel has a gas inlet, the air supply channel has an air inlet, the lower shell is embedded in the installation cavity and defines a normally closed gas flow channel, a normally open gas flow channel, a normally closed air flow channel and a normally open air flow channel.

In an alternative embodiment, the central axes of the upper and lower shells coincide.

In a further alternative embodiment, the upper shell comprises: the first plate body with the second plate body is at least partially overlapped in the projection of horizontal direction, and the overlapped part is formed at the air inlet of installation cavity intercommunication.

In a further optional embodiment, the upper shell is provided with a communicating pipe, and the communicating pipe constitutes a fuel gas supply channel.

In some embodiments of the present invention, the downstream section of the gas flow passage is provided with a lateral air inlet communicating with the outlet of the gas flow passage and the air flow passage.

In a further optional embodiment, the lateral air inlet is provided with a sliding door for adjusting the opening of the lateral air inlet.

In an alternative example, the outer wall of the sliding door is provided with a protruding rib.

According to the utility model discloses gas equipment includes the venturi device of above-mentioned embodiment, because according to the utility model discloses the venturi device can obtain the air-fuel ratio of preferred, and the commonality is strong, consequently, according to the utility model discloses gas equipment's combustion efficiency is high.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural view of a venturi apparatus according to some embodiments of the present invention;

FIG. 2 is a schematic view of another angle of a venturi apparatus according to some embodiments of the present invention;

FIG. 3 is a schematic view of another angle of a venturi apparatus according to some embodiments of the present invention;

FIG. 4 is a schematic view of another angle of a venturi apparatus according to some embodiments of the present invention;

FIG. 5 is a schematic view of another angle of a venturi apparatus according to some embodiments of the present invention;

FIG. 6 is a cross-sectional view taken along line A-A of FIG. 5;

fig. 7 is a top view of an upper housing according to further embodiments of the present invention;

fig. 8 is a bottom view of an upper housing according to further embodiments of the present invention;

fig. 9 is a schematic structural view of a lower case according to other embodiments of the present invention;

fig. 10 is a schematic view of another angular configuration of a lower shell according to further embodiments of the present invention;

fig. 11 is a schematic view of another angular configuration of a lower shell according to further embodiments of the present invention;

fig. 12 is a schematic view of another angular configuration of a lower shell according to further embodiments of the present invention;

fig. 13 is a schematic view of another angular configuration of a lower shell according to further embodiments of the present invention.

Reference numerals:

a venturi device 100;

a housing 10;

a gas flow channel 11; the fuel gas flow passage 111; a normally closed gas flow passage 1111; a normally open gas flow path 1112; an air flow passage 112; a normally closed air flow passage 1121; a normally open air flow passage 1122;

a first annular structure 12; a first annular cylinder 121; a first tubing string 122;

a second annular structure 13; a second annular cylinder 131; a second tubing string 132;

a valve 20;

an upper case 31; a gas supply passage 311; an air supply passage 312; a first plate body 313; a second plate 314; a gas inlet 315; an air inlet 316; a communicating pipe 317;

a lower case 32; a lateral air inlet 33;

a sliding door 34; raised ribs 341.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

With reference to fig. 1-13, a venturi apparatus 100 according to an embodiment of the present invention is described, wherein air and gas are premixed by the venturi apparatus 100 before entering the gas appliance. Wherein, the outlet of the venturi device 100 can be connected with the inlet of the blower, that is, the air-fuel gas (mixed gas of fuel gas and air) mixed by the venturi device 100 enters the air cavity of the blower under the suction of the blower, and the air-fuel gas is mixed in the air cavity and finally sent into the combustion chamber for combustion.

As shown in fig. 1-6, the venturi device 100 includes a housing 10 and a valve 20. The housing 10 defines a gas flow passage 11, the gas flow passage 11 is divided into a separate gas flow passage 111 and an air flow passage 112, and the gas flow passage 111 communicates with an outlet of the air flow passage 112. That is, air and gas enter the gas flow passage 11 through the relatively independent gas flow passage 111 and air flow passage 112, and are collected and mixed at the outlet to form air-fuel gas.

A valve 20 is disposed in the gas flow path 11 for selectively blocking a portion of the fuel gas flow path 111 and/or the air flow path. That is, the valve 20 selectively prevents part of the fuel gas from entering the fuel gas flow channel 111; or selectively prevent a portion of the air from entering the air flow passage 112; or simultaneously selectively preventing partial air and fuel gas from respectively entering the air flow passage 112 and the fuel gas flow passage 111, thereby controlling the air quantity and the fuel gas quantity entering the gas flow passage 11, obtaining a better air-fuel ratio and meeting different load requirements of the fuel gas equipment.

It should be noted that "selectively" means that under some operating conditions (e.g. under a low load condition), the valve 20 prevents a portion of gas and/or air from entering the air flow passage 112 and the gas flow passage 111, and a portion of gas and air can enter the air flow passage 112 and the gas flow passage 111, in other words, a portion of the gas flow passage 111 and/or the air flow passage 112 is conducted, and another portion is not conducted; under certain operating conditions (e.g., high load conditions), the valve 20 does not prevent gas and/or air from entering the air flow passage 112 and the gas flow passage 111, i.e., the gas flow passage 111 and/or the air flow passage are completely open.

In addition, the opening degree of the valve 20 may be proportional to the rotation speed of the fan, and the higher the rotation speed of the fan is, the larger the wind force generated by the fan is, and the larger the opening degree of the valve influenced by the wind force is.

Therefore, according to the venturi device 100 of the embodiment of the present invention, a portion of the gas flow channel 111 and/or the air flow channel 112 is selectively cut off by the valve 20 in the gas flow channel 11, so as to control the amount of air and gas entering the gas flow channel 11, obtain a better air-fuel ratio, and meet different load requirements of the gas equipment.

In some embodiments of the present invention, the gas flow passage 111 is divided into a normally closed gas flow passage 1111 and a normally open gas flow passage 1112, and/or the air flow passage 112 is divided into a normally closed air flow passage 1121 and a normally open air flow passage 1121. In other words, the gas flow passage 111 includes a normally closed gas flow passage 1111 and a normally open gas flow passage 1112, and the air flow passage 112 includes a normally closed air flow passage 1121 and a normally open air flow passage 1122. In this manner, the valve 20 can control the amount of gas and air entering the gas flow passage 11 by adjusting the normally-closed gas flow passage 1111 and/or the normally-closed air flow passage 1121.

In an alternative embodiment, as shown in fig. 2 and 3 in conjunction with fig. 9-12, a first annular structure 12 and a second annular structure 13 are disposed in the gas flow passage 11, the first annular structure 12 defines a normally closed gas flow passage 1111 and a normally closed air flow passage 1121, and the second annular structure 13 defines a normally open gas flow passage 11121 and a normally open air flow passage 1122. Namely, the normally closed flow channels (the normally closed gas flow channel 1111 and the normally closed air flow channel 1121) and the normally open flow channels (the normally open gas flow channel 1112 and the normally open air flow channel 1121) are separately arranged through the first annular structure 12 and the second annular structure 13, so that the flow channels can be structurally optimized, the flow channels are grouped according to the use state, and the valve 20 is more convenient to adjust the opening degrees of the normally closed gas flow channel 1111 and the normally closed air flow channel 1121.

In an alternative embodiment, the valve 20 is rotatable relative to the first annular structure 12 by wind, in the range of 0-90 °. When the rotation angle of the valve 20 is 0 °, the valve 20 closes the normally-closed gas flow channel 1111 and the normally-closed air flow channel 1121; when the wind power is small, the valve 20 is slightly opened, and the rotation angle of the valve 20 may be a value between 0 ° and 90 °, for example, 20 °, at this time, the normally-closed gas flow passage 1111 and the normally-closed air flow passage 1121 are slightly opened; when the wind power is large, the opening amplitude of the valve 20 is large, and the rotation angle of the valve 20 may be a value between 0 ° and 90 °, for example, 60 °, at this time, the normally-closed gas flow passage 1111 and the normally-closed air flow passage 1121 are almost opened; the valve 20 is not fully opened until the wind is sufficiently strong, and the angle of rotation of the valve 20 is 90 °.

It should be noted that the valve 20 is substantially parallel to the cross section of the airflow channel 11, so that the valve 20 is more sensitive to the wind, and the rotation angle of the valve 20 is positively correlated to the wind. Preferably, the airflow channel 11 is used for axial air inlet and axial air outlet, so that wind power can better act on the valve 20, the closing of the valve 20 can be better controlled, and the air inflow of fuel gas and air can be effectively regulated and controlled.

As shown in fig. 6, the end face of the second annular structure 13 extends beyond the end face of the first annular structure 12. Thus, the portion of the second annular structure 13 beyond the first annular structure 12 can limit the valve 20 to rotate towards the second annular structure 13, so as to avoid the valve 20 interfering with the air flow of the normally open gas flow passage 1112 and the normally open air flow passage 1122, and further effectively regulate the gas and air intake amount of the venturi device 100, thereby obtaining a better air-fuel ratio.

As also shown in fig. 6, the end face of the first annular structure 12 is inclined from the inside to the outside. In the event that the wind is sufficient to open the valve 20, the valve 20 is moved away from the end face of the first annular structure 12. Since the end surface of the first annular structure 12 is an inclined surface, the valve 20 is attached to the end surface of the first annular structure 12 by its own weight in the case of no or little wind. The terms "inner" and "outer" refer to the central axis of the housing, and one side close to the central axis of the housing 10 is inner, and the other side away from the central axis of the housing 10 is outer.

In one particular embodiment, as shown in fig. 9-12, the first ring structure 12 includes: the gas burner comprises a first annular barrel 121 and a first tubular column 122 arranged in the first annular barrel 121, wherein the inner wall of the first annular barrel 121 and the outer wall of the first tubular column 122 define a normally closed air flow channel 1121, and the first tubular column 122 defines a normally closed gas flow channel 1111; the second annular structure 13 comprises: the second annular cylinder 131 and the second tubular string 132 disposed in the second annular cylinder 131, the inner wall of the second annular cylinder 131 and the outer wall of the second tubular string 132 define a normally open air flow passage 1122, and the second tubular string 132 defines a normally open gas flow passage 1112. That is, the normally closed gas flow passage 1111 and the normally closed air flow passage 1121 are separated by the first stem 122, and the normally open gas flow passage 1112 and the normally open air flow passage 1122 are separated by the second stem 132, so that both gas and air have relatively independent flow passages before premixing.

In other embodiments of the present invention, as shown in fig. 1-6 in combination with fig. 7-13, the housing 10 includes an upper shell 31 and a lower shell 32, the upper shell 31 defines an installation cavity, a gas supply channel 311 having a gas inlet 315, and an air supply channel 312 having an air inlet 316, the lower shell 32 is embedded in the installation cavity and defines a normally closed gas flow channel 1111, a normally open gas flow channel 1112, a normally closed air flow channel 1121, and a normally open air flow channel 1122.

That is, the gas is input from the gas inlet of the upper shell 31 and then is respectively delivered to the normally open gas flow passage 1112 and the normally closed gas flow passage 1111 through the gas supply passage 311, wherein the number of the gas supply passage 311, the normally open gas flow passage 1112 and the normally closed gas flow passage 1111 may correspond one to one; air is also input from the air inlet 316 of the upper housing 31 and then delivered to the normally open air flow passage 1122 and the normally closed air flow passage 1121, respectively. In other words, both gas and air can enter the housing 10 separately from a single general inlet and mix to exit through a single general mixed gas outlet. It should be noted that the "upper shell 31" and the "lower shell 32" are schematically illustrated based on the orientation of the drawing, and do not limit the actual installation position of the venturi device 100.

In addition, the upper shell 31 and the lower shell 32 can be connected in a reinforcing manner by means of insertion, clamping or screw locking, so that the structural strength of the whole venturi device 100 is improved, and the problem of shaking or structural looseness of the venturi device 100 in the using process is prevented.

Alternatively, the center axes of the upper case 31 and the lower case 32 coincide. That is, air and gas enter the venturi device 100 at one axial end and mix and exit the venturi device 100 at the other axial end.

In some alternative examples, as shown in fig. 7 and 8, the upper case 31 includes: first plate body 313 and second plate body 314, first plate body 313 overlaps with second plate body 314 at least part in the horizontal direction projection, and the overlap portion forms in the air intake 316 of installation cavity intercommunication. In other words, the more the first plate 313 and the second plate 314 overlap, the larger the air inlet 316 is; the smaller the overlapping portion of the first plate 313 and the second plate 314 is, the smaller the air inlet 316 is. Therefore, according to the gas equipment with different load requirements, the overlapped part of the first plate body 313 and the second plate body 314 can be adjusted to obtain the optimal air-fuel ratio, and the universality of the overall structure of the Venturi device 100 is improved.

In order to facilitate the connection of the venturi apparatus 100 to the gas supply pipe, the upper housing 11 is provided with a connection pipe 317, and the connection pipe 217 constitutes a gas supply passage 311. The communication pipe 317 may be connected to a gas supply pipe, and gas is supplied to the normally closed gas flow path 1111 and the normally open gas flow path 1112 through the communication pipe 317. To better adjust the gas intake, a gas valve may be provided at the air inlet of the communicating pipe 317, and the gas valve may adjust the gas intake according to the magnitude of the wind pressure, thereby further adjusting the air-fuel ratio.

In other embodiments of the present invention, as shown in fig. 2, 4, 9-11 and 13, the downstream section of the gas flow passage 11 is provided with a lateral air inlet 33 communicating with the outlets of the gas flow passage 111 and the air flow passage. After the gas and air have been premixed, additional air may be supplied to the mixture again through the lateral air inlet 336. Therefore, the air inflow of the air can be slightly adjusted to be small through the lateral air inlet 33, and a more accurate air-fuel ratio is obtained.

The number of the lateral air inlets 33 may include a plurality of, for example, two, and the two lateral air inlets 33 are symmetrically arranged with respect to the axial center line of the housing 10. It will be understood that the foregoing is illustrative only and is not limiting upon the embodiments of the present invention. The lateral air inlets 33 may be a plurality of air inlets 33 located in the same circumferential direction of the housing 10, and the lateral air inlets 33 may also be a plurality of air inlets 33 spaced in the axial direction of the housing 10.

In an alternative example, as shown in fig. 10, the lateral air inlet 33 is provided with a sliding door 34 for adjusting the opening of the lateral air inlet 33. Thus, the opening degree of the side air inlet 33 can be controlled by sliding the sliding door 34 to obtain different side air inlet amounts.

In one embodiment, as shown in FIG. 10, the outer wall of the sliding door 34 is provided with a raised rib 341. The raised ribs 341 may serve to prevent sliding and facilitate circumferential displacement of the sliding door 34.

According to the utility model discloses gas equipment includes the venturi device 100 of above-mentioned embodiment, because according to the utility model discloses the venturi device 100 of embodiment can obtain the air-fuel ratio of preferred, and the commonality is strong, consequently, according to the utility model discloses gas equipment's combustion efficiency is high.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention.

Claims (15)

1. A venturi device, comprising:

the gas flow channel is divided into a gas flow channel and an air flow channel, and the gas flow channel is communicated with an outlet of the air flow channel;

and the valve is arranged in the gas flow channel and is used for selectively cutting off a part of the fuel gas flow channel and/or the air flow channel.

2. The venturi device of claim 1, wherein the gas flow passage is divided into a normally closed gas flow passage and a normally open gas flow passage, and/or the air flow passage is divided into a normally closed air flow passage and a normally open air flow passage.

3. The venturi device of claim 2, wherein a first annular structure and a second annular structure are disposed within the gas flow passage, the first annular structure defining the normally closed gas flow passage and the normally closed air flow passage, the second annular structure defining the normally open gas flow passage and the normally open air flow passage.

4. The venturi device of claim 3, wherein the valve is rotatable relative to the first annular structure by wind force, the range of rotation being between 0-90 °.

5. The venturi device of claim 4, wherein the end face of the second annular structure extends beyond the end face of the first annular structure.

6. The venturi device of claim 4, wherein the end face of the first annular structure is inclined from the inside to the outside.

7. The venturi device of claim 3, wherein the first annular structure comprises: the device comprises a first annular barrel and a first tubular column arranged in the first annular barrel, wherein a normally closed air flow channel is defined by the inner wall of the first annular barrel and the outer wall of the first tubular column, and a normally closed fuel gas flow channel is defined by the first tubular column; the second annular structure comprises: the normally open air flow passage is defined by the inner wall of the second annular cylinder and the outer wall of the second tubular column, and the normally open fuel gas flow passage is defined by the second tubular column.

8. The venturi device of claim 2, wherein the housing includes an upper shell defining a mounting cavity and defining a gas supply passage having a gas inlet and an air supply passage having an air inlet, and a lower shell embedded within the mounting cavity and defining a normally closed gas flow passage, a normally open gas flow passage, a normally closed air flow passage, and a normally open air flow passage.

9. The venturi device of claim 8, wherein the central axes of the upper and lower shells coincide.

10. The venturi device of claim 8, wherein the upper housing comprises: the first plate body with the second plate body is at least partially overlapped in the projection of horizontal direction, and the overlapped part is formed at the air inlet of installation cavity intercommunication.

11. The venturi device according to claim 10, wherein the upper housing is provided with a communicating tube constituting a gas supply passage.

12. The venturi device of any one of claims 1-11, wherein a downstream section of the gas flow passage is provided with a lateral air intake communicating with the outlets of the gas flow passage and the air flow passage.

13. The venturi device of claim 12, wherein the lateral intake vent is provided with a sliding door for adjusting the opening of the lateral intake vent.

14. The venturi device of claim 13, wherein an outer wall of the sliding door is provided with raised ribs.

15. A gas-fired appliance comprising a venturi device according to any one of claims 1 to 14.

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