WO2021062977A1 - Gas water heating apparatus, and flow-limiting member used for gas water heating apparatus - Google Patents

Abstract

The invention relates to a hot water supply apparatus, in particular a gas water heating apparatus. The gas water heating apparatus comprises a gas water heater with a combustor shell (4), and a flue assembly, wherein the combustor shell (4) is provided with a combustor air inlet (4a) and a combustor exhaust outlet (4b) located within the opening range of the combustor air inlet; the combustor air inlet (4a) and the combustor exhaust outlet (4b) are connected to the flue assembly in a sealed manner so as to receive combustion air and discharge flue gas; a flow-limiting member is arranged between the flue assembly and the combustor shell (4); and the flow-limiting member is at least partially located in an air intake channel between the combustor air inlet (4a) and the combustor exhaust outlet (4b), such that the air intake through-flow sectional area can be reduced. In addition, the invention further relates to the flow-limiting member for the gas water heating apparatus. In the invention, the air intake through-flow sectional area is adjusted by means of the flow-limiting member, the fuel-to-air ratio is improved, such that fuel gas can be fully combusted and flue gas emission is safe.

Description

Gas water heater equipment and flow-limiting parts used for gas hot water equipment

Cross-references to related applications

This application claims the rights and interests of Chinese patent applications 201921674054.0 and 201921674124.2 filed on September 30, 2019. The contents of these two applications are incorporated into this application by reference.

Technical field

The present invention relates to hot water supply equipment, in particular to a gas hot water equipment. In addition, the present invention also relates to a flow restrictor dedicated to the gas hot water equipment.

Background technique

At present, domestic gas water heaters have been gradually popularized and widely used. The gas water heater uses gas (natural gas or liquefied gas) as the energy source, and heats cold water through gas combustion, so as to supply hot water to the outside.

However, due to the different installation environment/use scenarios of the user terminal, gas water heaters need to be matched with flue pipes of different lengths. Some gas water heaters use fixed speed and constant wind speed to discharge flue gas. In the existing gas water heater, the cross-sectional area of the air inlet is immutable, that is, the cross-sectional area of the air inlet is fixed. As a result, when the short smoke pipe is in use, the speed is relatively too large, and the combustion air is excessive to produce off the flame. When the pipe is in use, the resistance of smoke exhaust increases, and the air supply is insufficient, which causes excessive smoke emission and vibration problems.

That is to say, in the prior art gas water heaters, in particular, most of the balanced fixed-speed fan models are used, the air inlet section is fixed and unchanged, and different lengths of smoke pipes need to be selected according to the installation environment and use occasions. In the case of a fixed speed, the intake air flow cross-sectional area cannot be installed and adjusted according to the situation, resulting in insufficient or excessive air during use, and the gas cannot reach the ideal combustion state, resulting in flame and smoke from the gas water heater. Excess gas or combustion vibration and other phenomena.

In addition, for gas water heaters on the market, the coaxial flue pipe is connected to the gas water heater through the chimney holder. Most of the existing chimney holders are stainless steel single-layer structures. The outer ring of the pipe is fixed by the chimney holder, and the inner ring is directly connected to the gas water heater. Smoke pipe connection. However, in the actual installation process of the gas water heater, the installation of the coaxial smoke pipe requires high installation accuracy. This structural design cannot adjust the installation error, making the installation and disassembly of the coaxial smoke pipe difficult. In addition, because the chimney seat is an accessory, the color often does not match the color of the whole machine of the gas water heater, which causes the chimney seat to be inconsistent with the color of the whole machine after installation, which affects the overall aesthetics.

The applicant’s earlier application was published on January 30, 2018. The Chinese utility model patent with the publication number CN206944494U discloses a chimney holder and a gas water heater. The chimney holder adopts a double-layer structure design. In the actual installation process, the installation of the coaxial smoke pipe still cannot adjust the installation error, and due to the double-layer structure, the connection between the inner pipe and the coaxial smoke pipe is more difficult, and the problem of installation and disassembly of the coaxial smoke pipe is very prominent.

In view of this, it is necessary to provide a new type of gas-fired hot water equipment.

Summary of the invention

One aspect of the technical problem to be solved by the present invention is to provide a gas-fired hot water device, which can match appropriate intake conditions according to the terminal installation environment, so as to achieve a relatively optimized air-fuel ratio and improve the combustion effect.

The further technical problem to be solved by the present invention is to provide a gas-fired hot water equipment, which can effectively improve the problem of difficulty in installation and disassembly of the gas water heater coaxial smoke pipe, and can improve the aesthetics of the whole machine.

The technical problem to be solved by another aspect of the present invention is to provide a flow restrictor for gas hot water equipment. The flow restrictor can be applied to the air intake channel according to the terminal installation environment of the gas water heater to match the appropriate air intake. Working conditions to improve the combustion effect.

In order to solve the above technical problems, the present invention provides a gas water heater, including a gas water heater with a burner housing and a flue assembly. The burner housing is provided with a burner air inlet and is located at the burner inlet. The combustor exhaust port within the range of the air port opening, the combustor intake port and the combustor exhaust port are hermetically connected with the flue assembly to be able to receive combustion air and discharge flue gas, wherein the A flow restrictor is provided between the flue assembly and the combustor housing, and the flow restrictor is at least partially located in the intake passage between the combustor intake port and the combustor exhaust port to The cross-sectional area of the air intake can be adjusted.

Specifically, the flow restrictor is a flow restrictor sandwiched between the chimney holder of the flue assembly and the burner housing.

Preferably, the restrictor plate is an annular restrictor ring, the flue assembly includes a chimney seat and a coaxial flue pipe, and the burner inlet and the burner exhaust port pass through the chimney seat and The coaxial smoke pipe is hermetically connected, and the diameter of the through hole in the restrictor ring is smaller than the diameter of the combustor intake port and greater than the outer diameter of the combustor exhaust port.

Specifically, the chimney holder is provided with a mounting flange connected to the burner housing as a water heater fixing structure, and the outer diameter of the restrictor ring is the same as the diameter of the mounting flange of the chimney holder A fastener installation hole is formed on the mounting flange edge, and the chimney holder is fixed on the gas water heater through the mounting flange edge.

Preferably, the cross-sectional area of the inner through hole of the restrictor ring is 70%-90% of the cross-sectional area of the burner inlet opening.

Typically, the diameter of the burner air inlet is the same as the inner diameter of the air inlet outer tube of the coaxial smoke pipe.

As a preferred specific structure, the chimney holder includes a chimney holder intake outer pipe layer and a chimney holder exhaust inner pipe layer which are coaxially arranged and connected with connecting ribs, and the chimney holder intake outer pipe layer The inner diameter of is the same as the diameter of the combustor intake port, and the exhaust inner pipe layer of the chimney holder can be sealingly butted with the combustor exhaust port.

More preferably, the chimney holder is provided with a first gas detection port communicating with the outer intake pipe layer of the chimney holder and a second gas detecting port communicating with the exhaust inner pipe layer of the chimney holder. Both the first and second gas detection ports are detachably closed by sealing screws.

Preferably, the chimney holder includes a clamping component fixed to the upper end of the intake outer pipe layer of the chimney holder to surround the exhaust inner pipe layer of the chimney holder, and the clamping component is a detachable split structure.

Specifically, the tightening component includes a first tightening piece and a second tightening piece. The two ends of the first tightening piece are formed with connecting outer flanges, and the two ends of the second tightening piece are formed with matching outer flanges. Flanging, a mounting structure for installing fasteners is formed on the connecting flanging and the mating flanging.

Typically, the tightening component further includes a sealing gasket for clamping between the connecting outer flange and the mating outer flange.

The outer diameter of the upper end of the air inlet outer pipe layer of the chimney holder is smaller than the outer diameter of the main body part of the air inlet outer pipe layer of the chimney holder to form a stepped shaft shape, and the outer diameter of the main body part of the tightening member is in the hoop. The tightening member is tightened and fixed on the upper end of the outer intake pipe layer of the chimney holder in the same state as the outer diameter of the main body of the outer intake pipe layer of the chimney holder, and the upper end of the tightening member is exhausted from the chimney holder The upper end of the inner tube layer is flush.

Preferably, the coaxial smoke pipe includes an air inlet outer pipe and an exhaust inner pipe, and the exhaust end of the exhaust inner pipe extends out of the air inlet of the smoke pipe of the air inlet outer pipe.

More preferably, the exhaust end port of the exhaust inner pipe is closed, and a plurality of smoke pipe exhaust ports are distributed on the peripheral wall of the exhaust end of the exhaust inner pipe.

Specifically, the coaxial smoke pipe includes a smoke pipe butting section that is butted with the chimney holder, and a smoke pipe elbow section is connected between the smoke pipe butting section and the main body section of the coaxial smoke pipe.

In addition, the present invention also provides a flow restrictor for a gas hot water appliance, wherein the flow restrictor is a flow restrictor used in the gas hot water appliance according to any of the above technical solutions.

Through the above technical solution, the gas hot water equipment of the present invention, according to the terminal installation environment or usage of the gas water heater, according to the parameters of the whole machine and passing the test test, selects a suitable flow restrictor so that the flow restrictor is at least partially in the intake air. In the channel, the intake air flow cross-sectional area is adaptively adjusted to the intake air flow state that matches the actual working conditions of the gas water heater, so that the intake air volume maintains the overall suitable range, and there is no obvious shortage or obvious excess of combustion air In this case, a relatively good fuel-air ratio is formed to avoid the phenomenon of flame separation, excessive flue gas or combustion vibration, and relatively effectively improve the combustion effect, make flue gas emission safe, and improve the experience of using gas-fired hot water equipment. The technical scheme of the present invention is not only suitable for newly installed gas-fired hot water equipment, but also suitable for upgrading and transformation of installed gas-fired hot water equipment, and has universal applicability.

In particular, in the preferred embodiment of the present invention, the chimney base exhaust inner pipe layer and the chimney base intake outer pipe layer of the present invention adopt a targeted structural design, and the tightening component is fixed to the chimney base intake outer pipe layer. The upper end part can wrap the exhaust inner pipe layer of the chimney holder. Since the chimney holder of the present invention actually uses a clamping component as a part of the chimney holder's intake outer pipe layer, after the chimney holder exhaust inner pipe layer is installed, the clamping component of the split structure is tightened to the outside of the chimney holder intake At the upper end of the tube layer, the tightening component adopts a split structure, which can be disassembled to adjust the tightness. Therefore, even if there is an installation error during the installation of the chimney holder and the coaxial pipe, the tightening degree of the tightening component can be effective The installation error is accommodated, making the installation and disassembly of the coaxial smoke pipe more convenient and easy, reducing the installation difficulty, and avoiding the hidden danger of gas leakage due to improper installation.

In addition, since the clamping component of the present invention is independent of the main part of the chimney holder, during use, the clamping component can be sprayed with the same or matching color coating according to the color of the entire gas water heater, which can improve the home environment , Improve the overall aesthetics of the gas water heater system.

The other advantages of the present invention and the technical effects of the preferred embodiments will be further described in the following specific embodiments.

Description of the drawings

Fig. 1 is an exploded schematic diagram of a gas hot water appliance according to a specific embodiment of the present invention.

Fig. 2 is an installation structure diagram of a gas hot water appliance according to a specific embodiment of the present invention.

Fig. 3 is an exploded structural schematic diagram of a chimney holder of a gas hot water appliance according to a specific embodiment of the present invention.

Fig. 4 is a schematic structural diagram of the chimney holder shown in Fig. 3.

Description of Reference Signs

1 Flow limiting ring 1a ring body

1b Restriction ring air inlet through hole 1c Restriction ring installation hole

2 Chimney holder 2a Chimney holder air intake outer pipe layer

2b Chimney holder exhaust inner pipe layer 2c Water heater fixing structure

3 Chimney holder mounting screws 4 Burner shell

4a Burner intake port 4b Burner exhaust port

4c Chimney holder installation hole 5 Coaxial flue pipe

5a Intake outer tube 5b Exhaust inner tube

5c Smoke pipe air inlet 5d Smoke pipe air outlet

5e Tobacco pipe docking section 5f Tobacco pipe elbow section

6Second gas detection port 7Second sealing screw

8 Connecting ribs 9 Second tightening piece

9a Paired flared edges 10 Fastening screws

11 The first tight piece 11a connects the outer flanging

12 Sealing gasket 13 First gas detection port

14 first sealing screw

Detailed ways

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and not to limit the present invention.

First of all, it should be noted that in the description of the following technical solutions of the present invention, the directional words "upper section", "upper port", etc., are technical definitions based on the chimney holder itself as the azimuth reference. Among them, the chimney holder is used for The end connected to the gas water heater is the lower end, and the opposite end is the upper end. However, the "upper" and "lower" do not refer to the upper and lower positions that the chimney holder must have when installed on the gas water heater. In actual installation, the gas water heater has different air inlet and exhaust ports. There are possibilities for vertical installation, inclined installation, and horizontal installation. The upper and lower positions of the chimney holder itself are not limited, which does not constitute a limitation on the protection scope of the gas water heater system of the present invention. The chimney holder of the present invention is applied to the gas water heater system. The technical meaning of azimuth should be explained based on the actual installation state and combined with the technical meaning of upper and lower positions based on the chimney holder itself.

Figures 1 and 2 show a preferred specific implementation of the gas hot water appliance of the present invention. It should be understood that the technical concept of the present invention is not limited to the specific preferred detailed structures shown in the figures. With appropriate reference to Figures 1 and 2, as the basic technical solution of the present invention, the gas-fired water heater of the present invention includes a gas-fired water heater with a burner housing 4 and a flue assembly. The burner housing 4 is provided with a burner air inlet The port 4a and the combustor exhaust port 4b within the opening range of the combustor intake port 4a, the combustor intake port 4a and the combustor exhaust port 4b are hermetically connected with the flue assembly to be able to receive combustion air and Exhaust flue gas, wherein a flow restrictor is provided between the flue assembly and the combustor housing 4, and the flow restrictor is at least partially located in the intake passage between the combustor intake port 4a and the combustor exhaust port 4b In this way, the intake air flow cross-sectional area can be adjusted.

The gas hot water equipment of the above-mentioned basic technical scheme of the present invention can select a flow restrictor with a suitable shielding area according to the terminal installation environment or use situation of the gas water heater, according to the parameters of the whole machine and pass the test test, so that the flow restrictor is at least partially in In the intake passage, the intake air flow cross-sectional area is adaptively adjusted to the intake air flow state that matches the actual working conditions of the gas water heater, so that the intake air volume maintains the overall suitable range, and there will be no obvious shortage of combustion air or In the case of obvious excess, a relatively good fuel-air ratio is formed to avoid the phenomenon of flame separation, excessive flue gas or combustion vibration, and relatively effectively improve the combustion effect, make flue gas emission safe, and improve the experience of using gas hot water equipment. The above-mentioned technical scheme of gas-fired hot water equipment is not only suitable for newly installed gas-fired hot water equipment, but also suitable for upgrading and transformation of installed gas-fired hot water equipment, and has universal applicability.

Within the scope of the technical concept of the above-mentioned basic technical solution of the present invention, the restrictor can adopt various suitable structural forms, for example, it can be a restrictor, a grid structure, a fan blade structure, etc., see Fig. 1 and Fig. 2, As a preferred technical solution, the flue assembly may include a chimney holder 2 and a coaxial flue pipe 5. The burner air inlet 4a and the combustor exhaust port 4b are hermetically connected to the coaxial flue pipe 5 through the chimney holder 2. That is, the air intake outer tube 5a of the coaxial smoke pipe 5 is hermetically connected to the burner air inlet 4a through the air intake outer pipe layer 2a of the chimney seat, and the exhaust inner pipe 5b of the coaxial smoke pipe 5 passes through the exhaust inner pipe of the chimney seat. The layer 2b is in hermetically connected with the combustor exhaust port 4b, wherein the restrictor can be a restrictor ring 1 sandwiched between the chimney holder 2 of the flue assembly and the combustor housing 4, and the restrictor ring 1 The outer diameter is greater than the diameter of the combustor intake port 4a, and the diameter of the inner through hole of the restrictor ring 1 is smaller than the diameter of the combustor intake port 4a and greater than the outer diameter of the combustor exhaust port 4b.

In this preferred embodiment, the restrictor ring 1 blocks a part of the flow space of the intake passage through the inner peripheral edge that protrudes into the intake passage, which not only has a simple structure, but also can effectively adjust the flow cross-sectional area. . According to the specific installation environment of the gas water heater, the restrictor ring 1 of different sizes can be selected, so that the intake air flow cross-sectional area can be adjusted to the air inlet flow state that matches the actual working conditions of the gas water heater, and the gas water heater is basically guaranteed The appropriate amount of combustion air will not be obviously insufficient or excessive, which will relatively effectively improve the combustion effect and make the flue gas emission safe.

As a more preferred technical solution, the lower end of the chimney holder 4 can be provided with a mounting flange connected to the burner housing 4 as a water heater fixing structure 1c, and the outer diameter of the restrictor ring 1 can be installed with the chimney holder 2. The flanges have the same diameter, and fastener installation holes are formed on the mounting flange, and the chimney holder 2 can be fixed on the gas water heater through the mounting flange. A screw installation through hole may be formed on the edge of the mounting flange. Correspondingly, the restrictor ring 1 also forms a restrictor ring installation hole 1c, and the burner housing 4 is formed with an internal threaded chimney holder installation hole. At the same time, the chimney holder 2 can be conveniently installed on the burner housing 4 by the chimney holder mounting screw 3, and the restrictor ring 1 is clamped and fixed between the chimney holder 2 and the burner housing 4 by the mounting flange. , The structure of the current limiting ring 1 is simple and practical, and has strong versatility.

Generally speaking, the size of the restrictor ring 1 can be designed in a variety of specifications to be selected according to the on-site installation situation. The cross-sectional area of the inner through hole of the restrictor ring 1 can be 70%-90% of the opening cross-sectional area of the combustor inlet 4a. In this way, the restrictor ring 1 can be added to effectively limit the cross-sectional area of the intake air flow. To 70%-90% of the original area of the burner inlet 4a. In order to facilitate the installation, a standardized installation form can be formed according to the size of the entire gas water heater through a test experiment, and the installer can choose different types of flow limiting rings according to the form corresponding to different installation environments.

Typically, the diameter of the combustor air inlet 4a is generally the same as the inner diameter of the air inlet outer tube 5a of the coaxial flue pipe 5, so as to ensure that the entire path of the combustion air inlet passage has roughly the same flow area and ensure the restrictor ring The installation position of 1 plays an effective current limiting role.

Preferably, the chimney base 2 includes a chimney base intake outer pipe layer 2a and a chimney base exhaust inner pipe layer 5b which are coaxially arranged and connected with connecting ribs 8 between each other. The inner diameter of the chimney base intake outer pipe layer 2a is equal to The diameter of the combustor air inlet 4a is the same, and the chimney seat exhaust inner pipe layer 5b can be sealingly butted with the combustor air outlet 4b. In addition, the chimney holder 2 is provided with a first gas detection port 13 communicating with the outer intake pipe layer 2a of the chimney holder and a second gas detecting port 6 communicating with the inner exhaust pipe layer 5b of the chimney holder. The first and second gas The detection ports are detachably closed by the first sealing screw 14 and the second sealing screw 7. In this way, during maintenance of the gas water heater, gas detection can be conveniently performed through the first gas detection port 13 and the second gas detection port 6 to detect the intake quality of the combustion air and the exhaust status of the exhaust smoke.

3 and 4, the gas water heater chimney holder 2 of the specific embodiment of the present invention can be protected as an independent component, which may include a chimney holder body. As described above, the chimney holder body includes a chimney holder air inlet outer pipe layer 2a And a chimney seat exhaust inner pipe layer 5b fixed in the chimney seat intake outer pipe layer 2a, wherein the chimney seat 2 includes the upper end of the chimney seat intake outer pipe layer 2a to surround the chimney seat exhaust inner pipe layer The tightening component of 5b, the tightening component is a detachable split structure.

The advantage of this two-layer design of the chimney seat is that the hot gas water heater uses gas to heat cold water, and requires air intake and exhaust. The exhaust pipe section is arranged in the inner layer, and the exhaust gas can be heated by heat transfer to heat the chimney seat intake and outer pipe layer 2a In order to reduce heat loss, provide heat utilization rate and save gas consumption.

In particular, through the above-mentioned chimney holder 2 of the present invention, the chimney holder 2 of the present invention adopts a double-layer structure, wherein the exhaust inner pipe layer 5b of the chimney holder and the air intake outer pipe layer 2a of the chimney holder can adopt a targeted structural design, such as The length of the inner exhaust pipe layer 5b of the chimney seat can be greater than the length of the outer intake pipe layer 2a of the chimney seat, so that the inner exhaust pipe layer 5b of the chimney seat protrudes from the upper port of the outer intake pipe layer 2a of the chimney seat. During the process, because the upper end of the exhaust inner pipe layer 5b of the chimney holder is exposed, it can be ensured that the chimney holder exhaust inner pipe layer 5b can be conveniently and easily installed in place with the inner pipe of the coaxial pipe. At the same time, the chimney holder adopts tightening components to compensate The length of the outer intake pipe layer 2a of the chimney holder is actually the tightening component as a part of the outer intake pipe layer 2a of the chimney holder. The inner pipe is wrapped by the tightening component. After the inner pipe is installed in place, the The clamping part of the split structure is clamped to the upper end of the air inlet outer pipe layer 2a of the chimney holder. The clamping part adopts a split structure, which can be disassembled and the tightness can be adjusted, even if the chimney holder and the coaxial pipe are installed in the process There are installation errors. Through the tightness of the tightening components, the installation errors can be effectively accommodated, making the installation and disassembly of the coaxial smoke pipe more convenient and easier, reducing the difficulty of installation, and avoiding the hidden danger of gas leakage due to improper installation.

The chimney holder 21 may be an integral casting, such as a cast aluminum piece, the chimney holder exhaust inner pipe layer 5b and chimney holder intake outer pipe layer 2a are formed as a whole, chimney holder exhaust inner pipe layer 5b and chimney holder intake outer pipe There is a radial interval between the layers 2a, which is convenient for the installation of the inner and outer tubes of the coaxial smoke pipe. The connecting rib 8 can be formed between the exhaust inner pipe layer 5b of the chimney seat and the air intake outer pipe layer 2a of the chimney seat. connection. This can be achieved relatively easily in casting technology, which reduces the parts that need to be sealed and reduces safety hazards.

The tightening component of the present invention can adopt a variety of split structure forms, such as three-piece, four-piece, etc., preferably, as shown in FIGS. 3 and 4, the tightening component may include a first tightening piece 11 and a first tightening piece 11 The second tightening piece 9, the first tightening piece 11 is formed with a connecting outer flange 11a, the second tightening piece 9 is formed with a matching outer flange 9a, and the connecting outer flange 11a and the matching outer flange 9a are formed with useful The installation structure for installing fasteners. Generally speaking, the first tightening piece 11 and the second tightening piece 9 can adopt a semi-circular body, which is convenient for tightening and fixing. Of course, it is not limited to this. The first tightening piece 11 and the second tightening piece 9 The main body of other shapes can be used, and it can be tightened and fixed all belong to the protection scope of the present invention.

Specifically, for example, the above-mentioned installation structure for installing fasteners may include a perforation formed on one of the connecting outer flange 2a and the mating outer flange 9a, and an internal threaded hole formed on the other. In this way, during the installation process, the lower ends of the first tightening piece 11 and the second tightening piece 9 are positioned to the upper end of the chimney seat inlet outer pipe layer 2a, and the connecting outer flange 2a is opposite to the counterpart outer flange 9a. The thread adjustment and tightening of the threaded fasteners (such as the fastening screw 10) can effectively make the tightening components tighten on the upper end of the chimney base intake outer pipe layer 2a and wrap around the chimney base exhaust inner pipe layer 5b . More preferably, in order to achieve a more effective sealing, the clamping member may further include a sealing gasket 12 for clamping between the connecting outer flange 11a and the mating outer flange 9a. The sealing gasket 12 can be a flexible elastic sealing gasket to have a certain amount of elastic compression. According to needs, a sealing gasket 12 of a suitable thickness can also be selected to effectively adapt to installation errors. Achieve effective sealing.

In order to facilitate the tightening of the tightening components and enhance the aesthetics in the installed state of the chimney holder, preferably, the outer diameter of the upper end of the chimney holder intake outer pipe layer 2a may be smaller than the main body of the chimney holder intake outer pipe layer 2a The outer diameter of the part is thus formed into a stepped shaft shape, and the outer diameter of the main body portion of the tightening member is in a state where the tightening member is tightened and fixed to the upper end of the outer inlet pipe layer 2a of the chimney seat. The outer diameter of the main part of the pipe layer 2a is the same or substantially the same, and the upper end of the tightening member is flush with the upper end of the chimney seat exhaust inner pipe layer 5b. That is to say, the thickness of the clamping piece of the clamping component is the same or substantially the same as the radius difference of the stepped shaft, so that when the clamping is installed, the clamping component as a whole will not protrude from the outer inlet pipe layer 2a of the chimney holder. The outer peripheral surface improves the overall aesthetics, and at the same time makes the tightening state of the tightening parts more firm and reliable. The upper end of the tightening component is flush or substantially flush with the upper end of the exhaust inner pipe layer 5b of the chimney holder, which is more convenient for the installation of the coaxial smoke pipe.

More preferably, the main body of the tightening component may be coated with the same color as or matching the color of the whole hot gas water heater. In this way, installing the chimney base 3 on the gas water heater can make the color of the chimney base body coordinate with the color of the entire gas water heater, improve the aesthetics of the gas water heater system, and beautify the home environment.

As described above, referring to Figures 1 and 2, the coaxial smoke pipe 5 generally includes an intake outer pipe 5a and an exhaust inner pipe 5b. In order to prevent exhaust from affecting the intake, the exhaust end of the exhaust inner pipe 5b extends into The flue gas inlet 5c of the gas outer tube 5a. In addition, in order to smoothly disperse the exhaust gas, the exhaust end port of the inner exhaust pipe 5b) is closed, and a plurality of smoke pipe exhaust ports 5d are distributed on the peripheral wall of the end of the exhaust end of the inner exhaust pipe 5b. Typically, in order to adapt to the installation environment, to absorb combustion air from the outdoors and discharge smoke to the outdoors, the coaxial smoke pipe 5 generally needs to be bent. The coaxial smoke pipe 5 may include a pipe docking section 5e that is butted with the chimney holder 2. The pipe connecting section 5e and the main section of the coaxial pipe 2 can be connected to the pipe elbow section 5f.

On the basis of the above-mentioned gas-fired hot water equipment of the present invention, the present invention also provides a flow restrictor dedicated to the above-mentioned gas-fired hot water equipment, such as the above-mentioned specifically designed flow restricting ring 1.

In summary, it can be seen that the gas hot water equipment of the present invention adopts different specifications of flow restrictors. According to the terminal installation environment or use conditions of the gas water heater, according to the parameters of the whole machine and passed the test test, the flow restrictor with a suitable shielding area can be selected. , The adaptability of the intake air flow cross-sectional area is adjusted to the intake air flow state that matches the actual operating conditions of the gas water heater, so that the intake air volume maintains the overall suitable range, and there will be no obvious shortage or obvious excess of combustion air. A relatively good fuel-air ratio is formed to avoid the phenomenon of flame separation, excessive flue gas or combustion vibration, and relatively effectively improve the combustion effect, make flue gas emission safe, and improve the experience of using gas hot water equipment. The technical scheme of the gas hot water equipment of the present invention is not only suitable for newly installed gas hot water equipment, but also suitable for upgrading and transformation of installed gas hot water equipment, and has universal applicability.

In addition, from the description of the embodiment of the chimney holder 2 of the present invention, it can be seen that the chimney holder 2 of the present invention adopts a double-layer structure, in which the chimney holder exhaust inner pipe layer 5b and the chimney holder intake outer pipe layer 2a adopt unique Structural design, the tightening component is fixed to the upper end of the chimney base intake outer pipe layer 2a and then surrounds the chimney base exhaust inner pipe layer 5b, so that the chimney base exhaust inner pipe layer 5b protrudes from the chimney base intake outer pipe layer 2a During the installation process, because the upper end of the exhaust inner pipe layer 5b of the chimney seat is exposed, it can ensure that the exhaust inner pipe layer 5b of the chimney seat is conveniently and easily installed in place with the inner tube of the coaxial pipe. At the same time, the chimney seat 2 Ingeniously use tightening components to compensate the length of the outer inlet pipe layer 2a of the chimney holder. After the inner pipe is installed in place, tighten the tightening components of the split structure to the upper end of the outer inlet pipe layer 2a of the chimney holder. , The tightening component adopts a split structure, which can be disassembled and the tightness can be adjusted. Even if there is an installation error in the installation process of the chimney holder and the coaxial pipe, the tightness of the tightening component can effectively accommodate the installation error, so that The installation and disassembly of the coaxial smoke pipe is more convenient and easy, which reduces the difficulty of installation and avoids the hidden danger of gas leakage due to improper installation. In addition, in the preferred embodiment of the present invention, through the design of the stepped shaft shape of the air inlet outer pipe layer 2a of the chimney holder and the coating arrangement of the tightening components, the aesthetics of the gas water heater system of the present invention in the overall installation state can be effectively improved. Improve the home environment.

The preferred embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details in the above-mentioned embodiments. Within the scope of the technical concept of the present invention, many simple modifications can be made to the technical solutions of the present invention. These simple modifications all belong to the protection scope of the present invention.

In addition, it should be noted that the various specific technical features described in the above-mentioned specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention is The combination method will not be explained separately.

In addition, various different embodiments of the present invention can also be combined arbitrarily, as long as they do not violate the idea of the present invention, they should also be regarded as the disclosed content of the present invention.

Claims (16)

1. A gas hot water equipment includes a gas water heater with a burner shell (4) and a flue assembly. The burner shell (4) is provided with a burner air inlet (4a) and is located in the burner The combustor exhaust port (4b) within the opening range of the gas port (4a), the combustor intake port (4a) and the combustor exhaust port (4b) are hermetically connected with the flue assembly to be able to Receiving combustion air and exhausting flue gas, characterized in that a flow restrictor is provided between the flue assembly and the burner housing (4), and the restrictor is at least partially located at the burner inlet (4a) In the intake passage between (4a) and the combustor exhaust port (4b), the intake passage cross-sectional area can be adjusted.
2. The gas hot water equipment according to claim 1, characterized in that, the flow restricting member is sandwiched between the chimney holder (2) of the flue assembly and the burner housing (4). Limiting piece.
3. The gas hot water equipment according to claim 1, characterized in that the restrictor plate is an annular restrictor ring (1), and the flue assembly includes a chimney holder (2) and a coaxial flue pipe ( 5), the burner inlet (4a) and the burner outlet (4b) are hermetically connected with the coaxial smoke pipe (5) through the chimney holder (2), and the restrictor ring ( 1) The diameter of the inner through hole is smaller than the diameter of the burner inlet (4a) and larger than the outer diameter of the burner outlet (4b).
4. The gas hot water equipment according to claim 3, wherein the chimney holder (2) is provided with a mounting flange connected to the burner housing (4) and used as a water heater fixing structure (1c) , The outer diameter of the restrictor ring (1) is the same as the diameter of the mounting flange edge of the chimney holder (2), a fastener installation hole is formed on the mounting flange edge, and the chimney holder passes through the The mounting flange is fixed on the gas water heater.
5. The gas hot water equipment according to claim 3, characterized in that the cross-sectional area of the inner through hole of the restrictor ring (1) is 70%-90% of the opening cross-sectional area of the burner inlet (4a) %.
6. The gas hot water equipment according to claim 3, characterized in that the outer diameter of the burner inlet (4a) is the same as the inner diameter of the inlet outer tube (5a) of the coaxial smoke pipe (5) .
7. The gas hot water equipment according to any one of claims 3 to 6, characterized in that the chimney holder (2) comprises a chimney holder air inlet outer pipe layer arranged coaxially and connected with connecting ribs between each other. (2a) and the chimney seat exhaust inner pipe layer (5b), the inner diameter of the chimney seat intake outer pipe layer (2a) is the same as the diameter of the burner inlet (4a), and the chimney seat row The gas inner tube layer (5b) can be sealingly butted with the combustor exhaust port (4b).
8. The gas hot water equipment according to claim 7, characterized in that the chimney holder (2) is provided with a first gas detection port (13) and The second gas detection port (6) communicates with the exhaust inner pipe layer (5b) of the chimney holder, and the first and second gas detection ports are both detachably closed by sealing screws.
9. The gas hot water equipment according to claim 7, characterized in that, the chimney holder (2) comprises an upper end portion of the air inlet outer pipe layer (2a) fixed to the chimney holder to surround the exhaust gas of the chimney holder The tightening component of the pipe layer (5b), the tightening component is a detachable split structure.
10. The gas hot water equipment according to claim 9, characterized in that, the tightening component comprises a first tightening piece (11) and a second tightening piece (9), the first tightening piece (11) The two ends are formed with connecting flared edges (11a), the two ends of the second clamping piece (9) are formed with matching flared edges (9a), the connecting flared edges (11a) and the matching flared edges (9a) ) Is formed with an installation structure for installing fasteners.
11. The gas hot water appliance according to claim 10, characterized in that, the clamping component further comprises a clamp for clamping between the connecting outer flange (11a) and the mating outer flange (9a) Gasket (12).
12. The gas hot water equipment according to claim 7, characterized in that the outer diameter of the upper end of the outer inlet pipe layer (2a) of the chimney holder is smaller than that of the main part of the outer inlet pipe layer (2a) of the chimney holder The outer diameter is formed in the shape of a stepped shaft, and the outer diameter of the main body portion of the tightening member is in a state where the tightening member is tightened and fixed on the upper end of the outer pipe layer (2a) of the chimney seat and enters into the chimney seat. The outer diameter of the main part of the outer pipe layer (2a) is the same, and the upper end of the tightening component is flush with the upper end of the exhaust inner pipe layer (5b) of the chimney holder.
13. The gas-fired hot water equipment according to any one of claims 3 to 6, characterized in that the coaxial smoke pipe (5) comprises an air intake outer pipe (5a) and an exhaust inner pipe (5b), and the The exhaust end of the exhaust inner pipe (5b) extends out of the smoke pipe air inlet (5c) of the air intake outer pipe (5a).
14. The gas-fired hot water appliance according to claim 13, wherein the exhaust end port of the exhaust inner pipe (5b) is closed, and the exhaust end of the exhaust inner pipe (5b) is on the peripheral wall of the exhaust end. Distributed with multiple smoke pipe exhaust ports (5d).
15. The gas hot water equipment according to claim 14, characterized in that the coaxial smoke pipe (5) comprises a smoke pipe docking section (5e) that is butted with the chimney holder (2), and the smoke pipe docking section A pipe elbow section (5f) is connected between (5e) and the main section of the coaxial pipe (2).
16. A flow limiting element for gas hot water equipment, characterized in that the flow limiting element is a flow limiting element used in the gas hot water equipment according to any one of claims 1 to 15.

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