CN212390365U - Gas premixing device and gas water heater with same - Google Patents

Abstract

The embodiment of the application provides a gas premixing device and gas heater who has it, wherein, gas premixing device includes: the gas mixing joint comprises a mixing section and a gas section, a mixing cavity is defined in the mixing section, an air inlet and a mixed gas outlet are respectively formed in two ends of the mixing cavity, the gas section is formed by extending the wall body of the mixing section outwards, a gas cavity is defined in the gas section, and the first axial end of the gas cavity is communicated with the mixing cavity to form a gas through hole; the gas outlet end of the gas conveying pipe is communicated with the second axial end of the gas cavity; the gas pressure regulating part is used for regulating the gas pressure of the gas entering the gas conveying pipe. The gas premixing device of the embodiment of the application has the advantages of simple structure, convenience in processing, good gas and air mixing effect and the like by adopting the technical scheme.

Description

Gas premixing device and gas water heater with same

Technical Field

The application relates to the technical field of electric appliance manufacturing, in particular to a gas premixing device and a gas water heater with the same.

Background

A gas adjusting device is proposed in the related art, and is installed at an air inlet of a fan, and is used for conveying gas into the fan and adjusting the flow rate of the gas. However, because the fan can form air negative pressure at the air inlet in the moment of starting, the sensitivity of the valve body of the gas adjusting device is affected, and therefore the gas adjusting device has the defects of poor stability, low flow adjusting precision and the like.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a gas premixing device and a gas water heater with the same, so as to solve or alleviate one or more technical problems in the prior art.

In a first aspect, an embodiment of the present application provides a gas premixing device, including:

the gas mixing joint comprises a mixing section and a gas section, a mixing cavity is defined in the mixing section, an air inlet and a mixed gas outlet are respectively formed in two ends of the mixing cavity, the gas section is formed by extending the wall body of the mixing section outwards, a gas cavity is defined in the gas section, and the first axial end of the gas cavity is communicated with the mixing cavity to form a gas through hole;

the gas outlet end of the gas conveying pipe is communicated with the second axial end of the gas cavity;

the gas pressure regulating part is used for regulating the gas pressure of the gas entering the gas conveying pipe.

In one embodiment, the gas delivery pipe is coaxial with the gas cavity, and the gas outlet end of the gas delivery pipe is opposite to the gas through hole.

In one embodiment, the air pressure adjusting part includes:

the adjusting joint is limited with an adjusting cavity and a gas conveying cavity formed by extending from the adjusting cavity, a gas outlet is formed in the adjusting cavity, the gas outlet is communicated with the gas inlet end of the gas conveying pipe, and a gas hole is formed at the communication position of the adjusting cavity and the gas conveying cavity;

the on-off valve is arranged in the gas conveying cavity and has an opening state and a closing state, the on-off valve avoids the gas hole in the opening state, and at least partially seals the gas hole in the closing state;

and the controller is communicated with the on-off valve to control the on-off valve to switch between the opening state and the closing state.

In one embodiment, the air holes comprise a first air hole and a second air hole, the first air hole and the second air hole are arranged at intervals, the on-off valve avoids the first air hole when in an open state, and the on-off valve blocks the first air hole when in a closed state.

In one embodiment, the gas mixing joint further comprises a sleeve extending at least partially into the mixing chamber, wherein an inner peripheral wall of the sleeve defines the air flow passage and an outer peripheral wall of the sleeve within the mixing chamber is spaced apart from an inner wall of the mixing chamber to define the fuel gas flow passage.

In an embodiment, the first end of the sleeve is arranged at the air inlet and is tightly attached to the inner wall of the air inlet, the second end of the sleeve extends into the mixing cavity, and the outer peripheral wall of the sleeve is arranged at an interval with the gas through hole.

In one embodiment, the first end of the sleeve has a retaining ring land and the air inlet has a retaining ring groove that mates with the retaining ring land.

In one embodiment, the second end of the sleeve is located between the gas through hole and the mixture outlet in the axial direction of the mixing chamber.

In one embodiment, the gas chamber extends in a radial direction of the mixing chamber.

In one embodiment, the second end of the gas section is provided with a connecting bayonet for connecting the gas outlet end of the gas conveying pipe.

In one embodiment, the gas premixing device further comprises:

and the proportional valve is connected to the air inlet end of the air pressure adjusting part and is provided with a gas inlet connector of the gas premixing device.

In a second aspect, the present application provides a gas water heater including a gas premixing device according to an embodiment of the present application.

In one embodiment, the gas water heater further comprises:

a housing;

the fan assembly is arranged in the shell, and the gas premixing device is arranged on the fan assembly;

the detection device is used for detecting the temperature of water and is arranged in the shell.

In one embodiment, a fan assembly comprises:

a housing;

the cover plate and the shell define an accommodating cavity, the cover plate is provided with an air inlet, and the air mixing joint is arranged at the air inlet;

the fan is arranged in the accommodating cavity.

The gas premixing device of the embodiment of the application has the advantages of high stability and accurate air pressure regulation by adopting the technical scheme.

The foregoing summary is provided for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present application will be readily apparent by reference to the drawings and following detailed description.

Drawings

In the drawings, like reference numerals refer to the same or similar parts or elements throughout the several views unless otherwise specified. The figures are not necessarily to scale. It is appreciated that these drawings depict only some embodiments in accordance with the disclosure and are therefore not to be considered limiting of its scope.

FIG. 1 shows a schematic view of a gas premixing device according to an embodiment of the present application;

FIG. 2 illustrates an exploded view of a gas mixing joint of a gas premixing device according to an embodiment of the present application;

FIG. 3 illustrates a partial cross-sectional view of a gas mixing joint of a gas premixing device according to an embodiment of the present application;

FIG. 4 is a schematic diagram illustrating a gas delivery pipe of a gas mixing joint of a gas premixing device according to an embodiment of the present application;

FIG. 5 is a schematic diagram illustrating the structure of the gas pressure regulating part and the gas delivery pipe of the gas premixing device according to the embodiment of the present application;

FIG. 6 illustrates a partial cross-sectional view of an air pressure adjustment portion and a gas delivery tube of a gas premixing device according to an embodiment of the present application;

FIG. 7 is a partial schematic view of the gas pressure regulating section and the gas delivery pipe of the gas premixing device according to the embodiment of the present application;

FIG. 8 illustrates a partial cross-sectional view of the gas pressure regulating portion and the gas delivery tube of the gas premixing device in accordance with an embodiment of the present application;

FIG. 9 illustrates a partial cross-sectional view of the gas pressure regulating portion and the gas delivery tube of the gas premixing device in accordance with an embodiment of the present application;

FIG. 10 illustrates a partial cross-sectional view of the gas pressure regulating portion and the gas delivery tube of the gas premixing device in accordance with an embodiment of the present application;

description of reference numerals:

a gas premixing device 1;

a gas mixing joint 100; a mixing section 110; a mixing chamber 110 a; an air inlet 111; a positioning ring groove 111 a; a mixed gas outlet 112; a gas through hole 113; a gas section 120; a gas chamber 120 a; a connection bayonet 121; positioning holes 122; a sleeve 130; the air flow passage 130 a; the fuel gas flow passage 130 b; a first end 131; a second end 132; a positioning ring stage 133;

an adjustment joint 200; the adjustment chamber 210; a gas outlet 211; a mounting ring groove 212; a gas delivery lumen 220; a mounting opening 221; a mount 222; a pressure tap 223; a connecting seat 224; a gas inlet 225; the first air hole 231; a second air hole 232; a shroud 240; a gas delivery pipe 250; the nozzles 250 a;

an on-off valve 300; a seal 310;

a proportional valve 400; a gas inlet joint 410;

a fan assembly 2;

a housing 201; a cover plate 202.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present application. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

A gas premixing device 1 according to an embodiment of the present application will be described with reference to fig. 1-10. The gas premixing device 1 of the embodiment of the present application can be used in a gas water heater to preliminarily mix gas and air before entering the fan assembly 2.

As shown in fig. 1 to 3, a gas premixing device 1 according to an embodiment of the present application includes a gas mixing joint 100, a gas delivery pipe 250, and a pressure adjusting portion.

Specifically, the gas mixing joint 100 includes a mixing section 110 and a gas burning section 120, the mixing section 110 internally defines a mixing cavity 110a, and both ends of the mixing cavity 110a respectively have an air inlet 111 and a mixture outlet 112. The gas section 120 is formed by extending the wall body of the mixing section 110 outwards, a gas cavity 120a is defined inside the gas section 120, the first end of the gas cavity 120a in the axial direction is communicated with the mixing cavity 110a to form a gas through hole 113, and the gas cavity 120a is communicated with the mixing cavity 110a through the gas through hole 113, so that the gas in the gas cavity 120a can enter the mixing cavity 110a through the gas through hole 113 to be mixed with air. It is understood that the gas section 120 and the mixing section 110 may be a unitary structure, wherein the gas section 120 is used to connect the gas delivery pipe 250 to deliver gas to the mixing chamber 110 a. The gas outlet end of the gas delivery pipe 250 is communicated with the axial second end of the gas cavity 120a, the gas outlet end of the air pressure adjusting part is communicated with the gas inlet end of the gas delivery pipe 250, and the air pressure adjusting part is used for adjusting the air pressure of the gas entering the gas delivery pipe 250.

In one embodiment, as shown in fig. 2 and 3, the gas mixing joint 100 further includes a sleeve 130. Specifically, a portion of the sleeve 130 protrudes into the mixing chamber 110a from the air inlet 111, wherein an inner circumferential wall of the sleeve 130 defines an air flow passage 130a, so that air can enter the mixing chamber 110a through the air flow passage 130 a; an outer peripheral wall of a portion of the sleeve 130 located within the mixing chamber 110a is spaced apart from an inner wall of the mixing chamber 110a to define a gas flow channel 130b, so that gas enters the mixing chamber 110a through the gas flow channel 130 b.

In one example, the sleeve 130 has a first end 131 and a second end 132 in the extending direction, the first end 131 of the sleeve 130 is installed at the air inlet 111 and is closely attached to the inner wall of the air inlet 111, the second end 132 of the sleeve 130 extends into the mixing chamber 110a, and the outer peripheral wall of the sleeve 130 is spaced apart from the gas through hole 113. Like this, not only can utilize sleeve 130 to carry out the water conservancy diversion respectively of air and gas, be convenient for air and gas form the mist in mixing chamber 110a to the mist can be smoothly followed mist outlet 112 and flowed out, but also can avoid sleeve 130 to shelter from gas through-hole 113, so that the gas smoothly gets into mixing chamber 110a through gas through-hole 113, thereby avoids sleeve 130 to exert an influence to the normal flow of gas. Furthermore, by closely attaching the first end 131 of the sleeve 130 to the inner wall of the air inlet 111, the leakage of the fuel gas through the gap between the sleeve 130 and the inner wall of the air inlet 111 can be avoided, so as to seal the fuel gas flow passage 130 b.

It should be noted that, in the embodiment of the present application, the sleeve 130 and the mixing section 110 may be of an integral structure or a split structure. For ease of processing, the sleeve 130 and the mixing section 110 may preferably be of a split construction.

According to gas premixing device 1 of the embodiment of the application, the part of sleeve 130 is extended into mixing cavity 110a through air inlet 111, so that the diversion of air and gas in mixing cavity 110a can be realized, the processing of air inlet 111 and mixed gas outlet 112 is convenient, the mixed gas of air and gas in mixing cavity 110a is convenient to form, and the mixed gas of air and gas flows out through mixed gas outlet 112, so that the working performance of gas premixing device 1 is further improved. Therefore, the gas premixing device 1 has the advantages of simple structure, convenience in processing, good gas and air mixing effect and the like.

Furthermore, because the gas mixing joint 100 is installed at the air inlet of the fan assembly 2, the gas is delivered to the gas chamber 120a through the gas delivery pipe 250 after the pressure of the gas pressure regulating part is regulated by the gas pressure regulating part by providing the gas delivery pipe 250 between the gas pressure regulating part and the gas mixing joint 100. Like this, can make atmospheric pressure regulation portion keep away from the air intake setting of fan subassembly 2, in the twinkling of an eye that fan subassembly 2 started, can avoid the air negative pressure that produces in air intake department of fan subassembly 2 to produce the influence to the sensitivity of the valve body of atmospheric pressure regulation portion (for example on-off valve 300), solved the gas premixing device among the prior art when the fan starts the malfunctioning technical problem of valve body. From this, can guarantee the stability of the valve body of atmospheric pressure regulating part to guarantee that atmospheric pressure regulating part can carry out accurate regulation to the atmospheric pressure of gas. Therefore, the gas premixing device 1 according to the embodiment of the present application also has the advantages of high stability and accurate air pressure adjustment.

In one embodiment, as shown in fig. 3, the gas delivery pipe 250 is disposed coaxially with the gas chamber 120a, and the gas outlet end of the gas delivery pipe 250 is disposed opposite to the gas through hole 113. Thus, the gas can directly enter the gas cavity 120a from the gas outlet end of the gas delivery pipe 250 and enter the gas through hole 113 along the axial direction of the gas cavity 120 a. Therefore, the gas flows smoothly and smoothly in the process of entering the mixing cavity 110a, thereby ensuring the flow rate of the gas. Moreover, by extending the gas chamber 120a in a straight direction, the structure of the gas joint can be simplified, and the structure of the mixing chamber 110a and the gas chamber 120a can be made more compact.

In one embodiment, as shown in fig. 2, the gas through hole 113 is located between the air inlet 111 and the mixture outlet 112 in the axial direction of the mixing chamber 110 a. Not only be convenient for like this air and gas mix in mixing chamber 110a, further be convenient for gas mixture smoothly flows out from gas mixture export 112, the setting of gas through-hole 113, air intlet 111 and gas mixture export 112 of being convenient for moreover avoids mutual interference between gas through-hole 113, air intlet 111 and the gas mixture export 112, is favorable to improving the smooth and easy nature that air and gas flow.

Alternatively, as shown in fig. 3, the second end of the sleeve 130 is located between the gas passing hole 113 and the mixture gas outlet 112 in the axial direction of the mixing chamber 110 a. Therefore, the gas can smoothly flow into the gas flow channel 130b, and the gas can be prevented from flowing out through the air flow channel 130a, so that the gas leakage is avoided, and the safety of the gas mixing joint 100 is further improved.

In one embodiment, as shown in fig. 2 and 3, the first end 131 of the sleeve 130 has a retaining ring land 133, the air inlet 111 has a retaining ring groove 111a, and the retaining ring land 133 is adapted to fit within the retaining ring groove 111 a.

In one example, the positioning ring land 133 is formed by extending the rim of the first end 131 of the sleeve 130 outward in a horizontal direction, and the positioning ring groove 111a is formed by inwardly recessing the inner wall of the air inlet 111. Therefore, the positioning ring platform 133 and the positioning ring groove 111a can be used for positioning the installation of the sleeve 130, the sleeve 130 and the mixing section 110 are convenient to assemble and high in assembly efficiency, and the joint of the sleeve 130 and the mixing cavity 110a is convenient to seal, so that the sealing performance of the fuel gas flow channel 130b is further improved, and the leakage of fuel gas from a gap between the sleeve 130 and the inner wall of the mixing cavity 110a is avoided. Preferably, a sealing gasket may be disposed between the retainer ring land 133 and the retainer ring groove 111a to further improve sealability.

In one embodiment, as shown in fig. 3, the gas chamber 120a extends in a radial direction of the mixing chamber 110a, that is, an axial direction of the mixing chamber 110a is perpendicular to an axial direction of the gas chamber 120 a. From this, the processing of gas through-hole 113 is comparatively convenient, is favorable to the inner space of gas through-hole 113 intercommunication mixing chamber 110a and the inner space of gas chamber 120a to the gas passes through the gas through-hole 113 and gets into the flow direction of gas runner 130b and the extending direction of gas runner 130b is perpendicular, is favorable to promoting the velocity of flow of gas in gas runner 130b, thereby improves the gas in mixing chamber 110a with the mixed effect of air.

In one embodiment, as shown in fig. 3, a second end of the gas section 120 (i.e. an end of the gas section 120 far from the mixing section 110) is provided with a connecting bayonet 121, and the connecting bayonet 121 is used for connecting an air outlet end of the gas delivery pipe 250.

In one example, the inner diameter of the connection bayonet 121 is larger than that of the portion of the gas section 120 adjacent to the mixing section 110, so that a portion of the gas delivery pipe 250 extends into the expansion section to communicate with the gas chamber 120a, the wall body of the expansion section is provided with a positioning hole 122, the positioning hole 122 penetrates through the wall body in the thickness direction of the wall body, and the positioning part penetrates through the positioning hole 122 to be in clamping fit with the outer peripheral wall of the gas delivery pipe 250. Wherein, the output end of the gas delivery pipe 250 may be provided with a nozzle 250a to increase the flow rate of the gas into the gas chamber 120 a.

Further, as shown in fig. 4, the outer peripheral wall of the gas delivery pipe 250, which protrudes into the connection snap portion, is provided with a mounting ring groove 212. Specifically, the installation ring groove 212 is a plurality of and is arranged at intervals along the length direction of the gas delivery pipe 250, and the positioning piece and the installation ring groove 212 form a clamping fit to fix the gas delivery pipe 250 on the connection bayonet 121.

In one embodiment, as shown in fig. 5-10, the air pressure regulating portion includes a regulating sub 200, an on-off valve 300, and a controller.

Specifically, the adjusting joint 200 defines an adjusting cavity 210 and a gas conveying cavity 220 formed by extending from the adjusting cavity 210, a gas outlet 211 is formed on the adjusting cavity 210, the gas outlet 211 is communicated with the gas inlet end of the gas conveying pipe 250, a gas inlet 225 is formed on the gas conveying cavity 220, and a gas hole is formed at the joint of the adjusting cavity 210 and the gas conveying cavity 220 and is communicated with the inner space of the adjusting cavity 210 and the inner space of the gas conveying cavity 220. The on-off valve 300 is mounted in the gas delivery chamber 220, the on-off valve 300 has an open state and a closed state, the on-off valve 300 avoids the gas hole when in the open state, and the on-off valve 300 at least blocks part of the gas hole when in the closed state. The controller communicates with the on-off valve 300 to control the on-off valve 300 to switch between the open state and the closed state. The gas section 120 of the gas mixing joint 100 is connected with the gas outlet 211 through a gas delivery pipe 250.

In one example, the regulator fitting 200 and the gas delivery tube 250 may be a unitary piece, and the regulator cavity 210 may be defined by the gas delivery tube 250 with the gas outlet 211 formed between the gas inlet end of the gas delivery tube 250 and the gas delivery cavity 220.

By arranging the adjusting joint 200, the on-off valve 300 and the controller, the controller can be used for controlling the working state of the on-off valve 300, so that the on-off valve 300 is switched between the opening state and the closing state, and the on-off valve 300 is convenient to avoid an air hole or at least block part of the air hole. Like this, can adjust the flow area of gas between chamber 210 and the gas transport chamber 220 according to concrete needs control, for example can utilize on-off valve 300 to dodge the gas pocket when gas pressure is great, make and adjust and have great flow area between chamber 210 and the gas transport chamber 220, so that reduce the pressure that the gas got into and adjust chamber 210, can utilize on-off valve 300 to block off a part of gas pocket when gas pressure is less, make and adjust chamber 210 and gas transport chamber 220 between have less flow area, so that the pressure that the gas got into and adjusts chamber 210 is increased.

Therefore, the pressure of the gas flowing through the gas premixing device 1 can be adjusted by the gas premixing device 1, the pressure of the gas flowing through the gas premixing device 1 can be controlled within a certain pressure range, the phenomenon that the pressure of the gas flowing through the gas premixing device 1 is too small or too large is avoided, and the gas water heater can conveniently adjust the air inflow of the gas. For example, the gas water heater utilizes the proportional valve 400 to adjust the air input of the gas, because the proportional valve 400 needs to be in a certain gas pressure range to realize better regulation performance, thus being convenient for making the proportional valve 400 be in a proper gas pressure regulation range, being convenient for the proportional valve 400 to accurately regulate the air input of the gas, improving the regulation precision of the proportional valve 400 to the air input of the gas, improving the gas inlet stability and reliability of the gas, making the gas and the air reach a proper proportional relation, being convenient for making the mixed gas of the gas and the air fully burn, improving the combustion efficiency of the mixed gas, not only improving the preparation efficiency of hot water, improving the water outlet stability of the hot water, improving the use comfort of users, but also reducing the emission of harmful gas in the tail gas and improving the environmental protection performance of the gas water heater.

And, through setting up the regulation joint 200, on-off valve 300 and controller, utilize on-off valve 300 control to adjust the size of flow area between chamber 210 and the gas delivery chamber 220, compare in the mode that utilizes venturi to realize adjusting gas pressure among the correlation technique, because the venturi inlet port is fixed, the scope of gas pressure regulation is littleer, it is difficult to realize the stable regulation of gas when gas pressure is great or gas pressure is less, easily cause the unstability of the mixed gas burning of gas and air, it is great to make hot water leaving water temperature deviation, and venturi structure is complicated, the processing degree of difficulty is big, the assemble duration is long. The gas premixing device 1 not only can enable the air inflow of gas and the air intake of air to have an accurate proportional relation, improves the stability and reliability of combustion of mixed gas of gas and air, improves the working reliability of the gas water heater, but also is convenient for production and manufacturing of the gas water heater, improves the production efficiency of the gas water heater and reduces the production cost of the gas water heater.

In one embodiment, as shown in fig. 6 to 10, the air holes include a first air hole 231 and a second air hole 232, the first air hole 231 and the second air hole 232 are spaced apart from each other, the on-off valve 300 is disposed to be spaced apart from the first air hole 231 when in an open state, and the on-off valve 300 is disposed to close the first air hole 231 when in a closed state. Therefore, gas can be smoothly introduced into the adjusting cavity 210 to ensure normal operation of the gas water heater, the on-off valve 300 can be used for avoiding or blocking the first gas hole 231 to adjust the gas flow area at the gas hole, the pressure of the gas in the gas premixing device 1 can be conveniently adjusted, and the working reliability and stability of the gas water heater can be improved.

Alternatively, the junction of the gas delivery chamber 220 and the conditioning chamber 210 is partitioned by a peripheral wall of the gas delivery chamber 220, and the first air hole 231 and the second air hole 232 are respectively formed on the peripheral wall. This facilitates not only the formation of the first air hole 231 and the second air hole 232 and the improvement of the processing efficiency of the first air hole 231 and the second air hole 232, but also the control of the opening and closing of the first air hole 231 by the on-off valve 300.

In one example, as shown in fig. 6 and 7, the first air hole 231 is located at the center, and the second air holes 232 are plural and arranged at intervals in the circumferential direction of the first air hole 231. Therefore, the on-off valve 300 is convenient to open or block the first air hole 231, the gas premixing device 1 is convenient to adjust the pressure of gas in the gas premixing device 1, and the adjusting effect of the gas water heater on the gas inflow is improved. Meanwhile, the arrangement space of the air hole and the on-off valve 300 is saved, so that the overall size of the gas premixing device 1 is reduced, the whole gas premixing device 1 is smaller and more flexible, and the installation and the arrangement of the gas premixing device 1 are further facilitated.

Further, as shown in fig. 6 and 7, each of the second air holes 232 is equally spaced from the first air hole 231, and the plurality of second air holes 232 are equally spaced in the circumferential direction of the first air hole 231. Therefore, the second air holes 232 are distributed more uniformly, so that the air flow is more uniform when the gas flows into the adjusting cavity 210 from the gas conveying cavity 220, the stress of the gas premixing device 1 is more uniform, and the structural stability of the gas premixing device 1 is improved.

In one example, as shown in fig. 8-10, the first air hole 231 is circumferentially surrounded by a shroud 240, and the on-off valve 300 is adapted to stop against the shroud 240 to close the first air hole 231. The on-off valve 300 is convenient for realize the switching of first gas pocket 231 through dodging or shutoff bounding wall 240 like this, and the on-off valve 300 of not only being convenient for is adjusted the gas pocket flow area, is convenient for improve the sealed effect of on-off valve 300 to first gas pocket 231 moreover, further improves the operational reliability of gas premixing device 1.

Further, one end of the surrounding plate 240 is connected to the outer circumferential wall of the adjustment chamber 210, and the other end extends in a direction away from the outer circumferential wall. Further, the shroud 240 is integrally formed with the adjustment cavity 210. This facilitates the provision of the shroud 240, which further facilitates the sealing of the first air hole 231 by the on-off valve 300.

Specifically, as shown in fig. 6, one end of the gas delivery cavity 220 has a mounting opening 221, at least a portion of the on-off valve 300 extends into the gas delivery cavity 220 through the mounting opening 221, a mounting seat 222 is provided at the mounting opening 221, and the on-off valve 300 is mounted on the mounting seat 222. The installation setting of the on-off valve 300 of being convenient for like this is convenient for improve the reliability of setting up of on-off valve 300, and the through-flow area of being convenient for further utilize on-off valve 300 regulation throttle department improves the gas premixing device 1 to the regulation effect of the gas pressure in the gas premixing device 1.

In one example, the mount 222 is integrally formed with the gas delivery cavity 220. Therefore, the installation seat 222 can be conveniently machined and molded, the assembly process of the gas premixing device 1 can be conveniently simplified, and the production efficiency of the gas premixing device 1 can be improved.

Further, the mounting port 221 is disposed opposite to the air hole. This facilitates the opening or blocking of the air hole by the on-off valve 300, facilitates the adjustment of the flow area of the air hole by the on-off valve 300, and facilitates the improvement of the adjustment reliability of the on-off valve 300.

Optionally, as shown in fig. 6 and 7, the gas delivery chamber 220 further has a pressure tap 223 to measure the pressure of the gas delivery chamber 220 through the pressure tap 223. Therefore, the pressure measuring hole 223 can be used for measuring the air pressure of the fuel gas in the fuel gas conveying cavity 220, so that the air pressure of the fuel gas in the fuel gas conveying cavity 220 can be conveniently and accurately determined, and the flow area of the air hole can be further conveniently adjusted.

Specifically, the extension direction of the adjustment chamber 210 is perpendicular to the extension direction of the gas delivery chamber 220. The formation of the gas pocket of being convenient for like this is convenient for utilize the gas pocket intercommunication to adjust chamber 210 inner space and gas and carry chamber 220 inner space, and the installation setting of the on-off valve 300 of being convenient for utilizes on-off valve 300 control to adjust the through-flow area between chamber 210 and the gas transport chamber 220 to adjust the pressure of gas in gas premixing device 1, make the pressure of gas be in certain within range.

Alternatively, as shown in fig. 6-8, the gas delivery cavity 220 has a connecting seat 224 at one end and is connected to the regulating cavity 210 at the other end, the connecting seat 224 is adapted to be connected to a gas source, and the connecting seat 224 is integrally formed with the gas delivery cavity 220. The gas of being convenient for like this is carried chamber 220 and is linked to each other with the gas air supply and improves gas and carry fastness of connection and reliability between chamber 220 and the gas air supply, and the gas of being convenient for is carried chamber 220 and is linked to each other with regulation chamber 210, improves the structural reliability and the stability of gas premixing device 1, avoids taking place the leakage of gas, improves gas heater's work safety performance.

Specifically, as shown in fig. 8, the other end of the adjustment cavity 210 has a plurality of mounting ring grooves 212, and the mounting ring grooves 212 are spaced apart along the length direction of the adjustment cavity 210. Specifically, the mounting ring groove 212 is provided on the outer circumferential surface of the adjustment chamber 210, and extends in the circumferential direction of the adjustment chamber 210. Therefore, the gas premixing device 1 is convenient to be connected with the gas mixing connector 100, the sealing effect between the gas premixing device 1 and other structures is convenient to improve, gas leakage is avoided, and the working reliability and safety of the gas water heater are convenient to improve.

Alternatively, the on-off valve 300 is a solenoid valve. Therefore, the electric control of the on-off valve 300 can be realized, the on-off valve 300 can be used for controlling the opening and closing of the first air hole 231 conveniently, the control reliability and stability of the on-off valve 300 are improved, the response speed of the electromagnetic valve is high, the sensitivity and accuracy of the controller for controlling the on-off valve 300 are improved conveniently, the on-off valve 300 can be used for controlling the opening and closing of the first air hole 231 conveniently, and the reliability of function switching of the gas premixing device 1 is improved conveniently.

Specifically, as shown in fig. 9 and 10, the on-off valve 300 includes a seal 310. Specifically, the projection of the shroud 240 onto the seal 310 is located inward of the outer contour of the seal 310. This makes it possible to seal the first air hole 231 with the seal member 310, and improves the sealing effect of the on-off valve 300 with respect to the first air hole 231. Meanwhile, when the on-off valve 300 is in a closed state, the sealing member 310 is in a gas-compressed state, which is beneficial to improving the sealing effect of the sealing member 310.

Alternatively, air holes may be used to mount the nozzle 250 a.

In one embodiment, the gas premixing device 1 further comprises a proportional valve 400, the proportional valve 400 is connected to the air inlet end of the air pressure adjusting portion, and the proportional valve 400 is provided with a gas inlet joint 410 for communicating with a gas source. Wherein, the gas inlet end of the gas pressure regulating part can be a gas inlet 225 of the gas conveying cavity 220. Further, the proportional valve 400 is electrically connected to a controller, and the controller controls the gas ventilation amount of the proportional valve 400 based on a detection value of the detection device.

A gas water heater according to an embodiment of the present application is described below with reference to fig. 1.

As shown in fig. 1, the gas water heater of the embodiment of the present application includes a gas premixing device 1 according to the embodiment of the present application.

In one embodiment, the gas water heater further comprises a housing, a fan assembly 2, and a detection device. Wherein, fan subassembly 2 is established in the casing, and gas premixing device 1 installs in fan subassembly 2. The detection device is arranged in the shell and used for detecting the temperature of water. From this, be convenient for the reliable input of air and gas, be convenient for control the air input of air and the air input of gas respectively, be convenient for make air and gas have suitable ratio scope, not only the gas of being convenient for fully burns, improves the combustion efficiency of gas, improves the hydrothermal efficiency of gas heater preparation, is convenient for reduce the harmful substance in the tail gas moreover, is convenient for protect natural environment, improves gas heater's feature of environmental protection ability. Meanwhile, the proportional relation between the air and the gas can be conveniently determined according to the detection value of the detection device, and the working reliability of the gas water heater is further improved.

In one embodiment, the fan assembly 2 includes a cabinet 201, a cover plate 202, and a fan. Specifically, the cover plate 202 and the casing 201 define a containing cavity, the cover plate 202 is provided with an air inlet, the air mixing connector 100 is installed at the air inlet, and the fan is arranged in the containing cavity. From this, not only be convenient for mix the installation setting of gas joint 100, reduce to set up and mix the required installation space of gas joint 100, improve gas heater's compact structure nature and rationality, be convenient for moreover with the leading-in intracavity that holds of the mist of air and gas and carry out the intensive mixing.

In one example, cover plate 202 has a mounting flange thereon to which gas mixing sub 100 is mounted via a threaded connection. Therefore, the installation and the arrangement of the gas mixing joint 100 can be facilitated, the gas mixing joint 100 can be firmly installed on the cover plate 202, and the reliability and the stability of the fixed connection between the gas mixing joint 100 and the cover plate 202 are ensured. Meanwhile, when the gas mixing joint 100 breaks down, the gas mixing joint can be quickly replaced and maintained, and the maintenance cost of the gas water heater is reduced.

In one example, the controller is electrically connected to the on-off valve 300, the proportional valve 400, and the detection device, respectively, to control the ventilation amount of the proportional valve 400 and the on-off of the on-off valve 300 according to the detection value of the detection device. Therefore, the controller is further convenient to control the air inflow of the fuel gas, and the air inflow stability of the fuel gas is improved.

Other configurations of the gas water heater of the above embodiments can be adopted by various technical solutions known to those skilled in the art now and in the future, and will not be described in detail herein.

According to the gas premixing device 1 of the embodiment of the application, through adopting the gas mixing joint 100 provided with the mixing cavity 110a and the gas cavity 120a, the gas enters the mixing cavity 110a through the gas cavity 120a to be premixed with the air, and therefore the gas premixing device 1 of the embodiment of the application has the advantages of simple structure, convenience in processing, high production efficiency and the like. Moreover, the sleeve 130 extends into the mixing cavity 110a from the air inlet 111, so that the air and the fuel gas can be guided in the mixing cavity 110a, the air inlet 111 and the fuel gas outlet 112 are convenient to process, mixed gas can be conveniently formed in the mixing cavity 110a by the air and the fuel gas, the mixed gas of the air and the fuel gas can conveniently flow out through the mixed gas outlet 112, and the working performance of the gas premixing device 1 can be further improved.

In the description of the present specification, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" 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 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 specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. 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.

The above disclosure provides many different embodiments or examples for implementing different structures of the application. The components and arrangements of specific examples are described above to simplify the present disclosure. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive various changes or substitutions within the technical scope of the present application, and these should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (14)

1. A gas premixing device, comprising:

the gas mixing joint comprises a mixing section and a gas section, a mixing cavity is defined in the mixing section, an air inlet and a mixed gas outlet are respectively formed in two ends of the mixing cavity, the gas section is formed by outwards extending a wall body of the mixing section, a gas cavity is defined in the gas section, and a first axial end of the gas cavity is communicated with the mixing cavity to form a gas through hole;

the gas outlet end of the gas conveying pipe is communicated with the second axial end of the gas cavity;

the gas pressure regulating part, the end of giving vent to anger of gas pressure regulating part with the inlet end intercommunication of gas conveyer pipe, gas pressure regulating part is used for adjusting the entering the atmospheric pressure of the gas of gas conveyer pipe.

2. The gas premixing device of claim 1 wherein the gas delivery pipe is coaxial with the gas chamber and the gas outlet end of the gas delivery pipe is opposite to the gas through hole.

3. The gas premixing device of claim 1 wherein the gas pressure regulating portion comprises:

the adjusting joint is limited with an adjusting cavity and a gas conveying cavity formed by extending from the adjusting cavity, a gas outlet is formed in the adjusting cavity and communicated with the gas inlet end of the gas conveying pipe, and a gas hole is formed at the communication position of the adjusting cavity and the gas conveying cavity;

the on-off valve is arranged in the gas conveying cavity and has an opening state and a closing state, the on-off valve avoids the gas hole in the opening state, and at least partially seals the gas hole in the closing state;

a controller in communication with the on-off valve to control the on-off valve to switch between the open state and the closed state.

4. The gas premixing device of claim 3 wherein the gas holes comprise a first gas hole and a second gas hole, the first gas hole and the second gas hole being spaced apart, the on-off valve avoiding the first gas hole when in the open state, the on-off valve blocking the first gas hole when in the closed state.

5. The gas premixing device of claim 1 wherein the gas mixing junction further comprises a sleeve extending at least partially into the mixing chamber, wherein an inner peripheral wall of the sleeve defines an air flow passage, and wherein an outer peripheral wall of the sleeve within the mixing chamber is spaced from an inner wall of the mixing chamber to define a gas flow passage.

6. The gas premixing device of claim 5 wherein the first end of the sleeve is mounted to the air inlet and abuts against the inner wall of the air inlet, the second end of the sleeve extends into the mixing chamber, and the outer peripheral wall of the sleeve is spaced from the gas passage.

7. The gas premixing device of claim 6 wherein the first end of the sleeve has a retaining ring land and the air inlet has a retaining ring groove at the air inlet that mates with the retaining ring land.

8. Gas premixing device according to claim 7 wherein the second end of the sleeve is located between the gas through hole and the mixture outlet in the axial direction of the mixing chamber.

9. Gas premixing device according to claim 1, characterized in that the gas chamber extends in radial direction of the mixing chamber.

10. The gas premixing device of claim 1 wherein the second end of the gas section is provided with a connecting bayonet for connecting the gas outlet end of the gas delivery pipe.

11. The gas premixing device of claim 1 further comprising:

and the proportional valve is connected to the air inlet end of the air pressure adjusting part and is provided with a gas inlet joint of the gas premixing device.

12. A gas water heater comprising a gas premixing device as claimed in any of claims 1-11.

13. The gas water heater of claim 12, further comprising:

a housing;

the fan assembly is arranged in the shell, and the gas premixing device is arranged on the fan assembly;

and the detection device is used for detecting the temperature of the water and is arranged in the shell.

14. The gas water heater of claim 13, wherein the fan assembly comprises:

a housing;

the cover plate and the shell define an accommodating cavity, the cover plate is provided with an air inlet, and the air mixing joint is arranged at the air inlet;

the fan is arranged in the accommodating cavity.

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