Gas distribution pipe of water heater

Abstract

The gas distribution pipe comprises a distribution pipe body, a first adjusting cavity, a second adjusting cavity and a gas inlet cavity which are coaxial are arranged in the distribution pipe body, the gas inlet cavity is communicated with two electromagnetic valve mounting cavities through a connecting channel, the cavities are provided with gas inlet valve ports which are communicated with the adjusting cavities, and electromagnetic valves are assembled to achieve opening and closing of the channel. The pipe body of the distribution pipe corresponds to the adjusting cavity, the connecting channel is provided with a gas nozzle, and four segmented combustion modes are achieved through opening and closing of the two electromagnetic valves. The number difference of the nozzles in all the sections is small, the air flow overlapping area is large, temperature fluctuation is avoided, the minimum heat load is reduced, and the multi-scene constant-temperature requirement is met; the connecting channel can be directly extended for processing without additional process holes, so that the use amount of sealing blanking caps is reduced, the processing is simplified, and the cost is reduced; the pressure test channel is additionally arranged, debugging is convenient, the sealing reliability is improved through the line contact sealing design, the overall structure is reasonable, and operation is stable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas pipes, in particular to a gas distribution pipe of a water heater. BACKGROUND

[0002] Nowadays, as a core component of gas water heaters, the gas distribution pipe bears the key functions of gas flow distribution and segmented combustion control. After being proportionally adjusted by a gas proportional valve, the gas enters the distribution pipe, the uniform distribution of the gas flow is realized by the gas distribution cavity in the pipe, and then the combustion segmentation is switched by controlling the electromagnetic valve on the distribution pipe, so as to finally achieve precise regulation and control of different heat loads of the water heater and guarantee constant temperature hot water supply.

[0003] At present, the mainstream gas water heaters are all automatic constant temperature type products, and the design logic is that after the user sets the target temperature through the operation panel, the water heater adjusts and adapts to the temperature demand through the load. However, in the actual use scene, the defects of the prior art are particularly prominent: on the one hand, the mainstream distribution pipe only adopts two-segment design, and the number of nozzles is greatly different when the segments are switched, which leads to limited gas volume coverage range, not only easily causing temperature fluctuation in low gas pressure working condition, but also causing the problem that the hot water temperature far exceeds the set value in the scene of high water temperature in summer; on the other hand, due to the unreasonable segmented structure design of the existing distribution pipe, even if the segmented switching is completed, the number of nozzles is still large, which leads to that the minimum heat load cannot be further reduced, and if the user also has the condition of small water consumption, the water heater will completely fail to reach the set temperature, which seriously affects the use experience.

[0004] The deeper problem is that the internal cavity layout of the existing distribution pipe is complicated, multiple plugging sealing covers need to be set to realize the two-segment function, which not only increases the requirement of opening of the machining process hole, but also leads to complex machining process, high assembly difficulty, and increases the risk points of gas leakage, which not only increases the production manufacturing cost, but also reduces the product reliability.

[0005] Therefore, it is urgent to develop a new type of gas distribution pipe, which solves the problems of large minimum heat load and poor temperature regulation adaptability of the existing gas distribution pipe, and focuses on optimizing the structure design to simplify the machining process, reduce the number of sealing covers and the opening of additional process holes, reduce the machining difficulty and production cost, and at the same time guarantee the stability and sealing of gas distribution. SUMMARY

[0006] The purpose of the present application is to provide a gas distribution pipe of a water heater, which aims to solve the problems of large minimum heat load and poor temperature regulation adaptability of the existing gas distribution pipe, and complex structure and large machining difficulty.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical scheme: A gas distribution pipe for a water heater includes a distribution pipe body, in which a first regulating chamber and a second regulating chamber are coaxially formed; The distribution pipe body is further provided with an air inlet chamber, a first solenoid valve mounting chamber, and a second solenoid valve mounting chamber. The first solenoid valve mounting chamber has a first air inlet port that communicates with the first regulating chamber, and the second solenoid valve mounting chamber has a second air inlet port that communicates with the second regulating chamber. The air inlet chamber is connected to the first solenoid valve mounting chamber and the second solenoid valve mounting chamber through a first connecting channel and a second connecting channel, respectively. A first solenoid valve is installed in the first solenoid valve mounting cavity. The valve body of the first solenoid valve is sealed to the port of the first solenoid valve mounting cavity, and the valve core of the first solenoid valve is sealed to the first air inlet valve port. A second solenoid valve is installed in the second solenoid valve mounting cavity. The valve body of the second solenoid valve is sealed to the port of the second solenoid valve mounting cavity, and the valve core of the second solenoid valve is sealed to the second air inlet valve port. At least one gas nozzle is installed on the distribution pipe body corresponding to the first regulating chamber, the second regulating chamber, the first connecting channel, and the second connecting channel, respectively.

[0008] Preferably, the first connecting channel and the second connecting channel form the same angle with the central axis of the distribution pipe body.

[0009] Preferably, the distribution pipe body is further provided with a pressure test channel, which is connected to the air intake chamber; a plug screw is threaded into the pressure test channel.

[0010] Preferably, both ends of the distribution pipe body and the opening end of the air intake chamber are respectively provided with sealing caps, and the sealing caps are interference fit with the distribution pipe body.

[0011] Preferably, arc-shaped protrusions are provided on both the side of the first air intake valve port near the first solenoid valve mounting cavity and the side of the second air intake valve port near the second solenoid valve mounting cavity.

[0012] Preferably, one gas nozzle is installed on each of the first and second connecting channels, three gas nozzles are installed in the first regulating chamber, and one gas nozzle is installed in the second regulating chamber.

[0013] Compared with the prior art, the beneficial effects of this application are: 1. In this application, different segmented combustion modes can be achieved by opening and closing two solenoid valves. Compared with the existing technology that can only achieve two-segment switching design, the difference in the number of gas nozzles between segments is smaller, the gas volume overlap area is greatly expanded, effectively avoiding the temperature fluctuation problem caused by sudden gas volume changes during segment switching, and the minimum heat load is further reduced. It can not only adapt to the low temperature demand when the inlet water temperature is high in summer and the user's water consumption is low, but also operate stably under low gas pressure conditions, significantly improving the constant temperature accuracy and user comfort of the water heater under different gas pressures and different water use scenarios. Meanwhile, the distribution pipe has a reasonable chamber layout. The connection channel between the intake chamber and the regulating chamber can be directly machined by inserting a tool into the corresponding chamber without the need for additional machining holes. Furthermore, the end of the connection channel does not require a separate sealing cap, and a reliable seal can be achieved with the help of a solenoid valve and a sealing ring. This reduces the number of sealing caps used, which not only simplifies the machining process and reduces the machining difficulty, but also shortens the production cycle and reduces the error risk caused by opening holes during the machining process.

[0014] 2. In this application, the distribution pipe body is provided with a pressure test channel that connects to the air inlet chamber, which can be directly connected to pressure testing equipment to detect gas pressure. Production debugging can be completed without disassembling the product, which greatly improves debugging efficiency.

[0015] 3. In this application, an arc protrusion is provided on the side of the air inlet near the solenoid valve mounting cavity to form a line contact seal with the end face of the solenoid valve sealing gasket, which reduces the sealing contact area and ensures the sealing effectiveness; and the sealing plug and the distribution pipe body adopt an interference fit to reduce the risk of air leakage. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present application and form part of the specification. They are used together with the embodiments of the present application to explain the present application, but do not constitute a limitation thereof. In the drawings: Fig. 1 This is a diagram of the gas distribution pipe assembly. Fig. 2 Exploded view of a gas distribution pipe; Fig. 3 This is a cross-sectional view of the gas distribution pipe body; Icons: 1 Distribution pipe body, 2 First regulating chamber, 3 Second regulating chamber, 4 Inlet chamber, 5 First solenoid valve mounting chamber, 6 Second solenoid valve mounting chamber, 7 First connecting channel, 8 Second connecting channel, 9 First solenoid valve, 10 Second solenoid valve, 11 First inlet valve port, 12 Second inlet valve port, 13 Gas nozzle, 14 Pressure test channel, 15 Plug screw, 16 Sealing plug, 17 Sealing ring. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] Example like Figs. 1-3 This is the first embodiment of the present application. This embodiment discloses a gas distribution pipe for a water heater, including a distribution pipe body 1. The distribution pipe body 1 has an inlet chamber 4, a first regulating chamber 2, and a second regulating chamber 3 inside. Both the first regulating chamber 2 and the second regulating chamber 3 are provided with solenoid valve mounting cavities. The first regulating chamber 2 corresponds to the first solenoid valve 9 mounting cavity 5, and the second regulating chamber 3 corresponds to the second solenoid valve 10 mounting cavity 6. The first solenoid valve 9 mounting cavity 5 has a first inlet valve port 11 that communicates with the first regulating chamber 2, and the second solenoid valve 10 mounting cavity 6 has a second inlet valve port 12 that communicates with the second regulating chamber 3. The inlet chamber 4 is connected to the first solenoid valve 9 mounting cavity 5 and the second solenoid valve 10 mounting cavity 6 through a first connecting channel 7 and a second connecting channel 8, respectively. The connecting channels are machined by directly inserting a cutting tool into the first solenoid valve 9 mounting cavity 5 and the second solenoid valve 10 mounting cavity 6, without the need to open additional machining process holes. A first solenoid valve 9 is installed in the mounting cavity 5 of the first solenoid valve 9. The valve body of the first solenoid valve 9 is sealed to the port of the mounting cavity 5 of the first solenoid valve 9, and the valve core of the first solenoid valve 9 is sealed to the first air inlet 11. A second solenoid valve 10 is installed in the mounting cavity 6 of the second solenoid valve 10. The valve body of the second solenoid valve 10 is sealed to the port of the mounting cavity 6 of the second solenoid valve 10, and the valve core of the second solenoid valve 10 is sealed to the second air inlet 12. A rubber sealing ring 17 is also provided between the solenoid valve and the solenoid valve mounting cavity. An arc protrusion is provided on the side of the air inlet near the solenoid valve mounting cavity to form a line contact seal with the end face of the solenoid valve sealing gasket, which reduces the sealing contact area and ensures the sealing effectiveness. At least one mounting hole is provided on the distribution pipe body 1 corresponding to the first regulating chamber 2, the second regulating chamber 3, the first connecting channel 7, and the second connecting channel 8. A gas nozzle 13 is installed on the mounting hole. The gas nozzle 13 and the mounting hole are interference fit, and a stable assembly can be achieved without additional fixing structure. Preferably, the first connecting channel 7 and the second connecting channel 8 are equipped with two gas nozzles 13, the first regulating chamber 2 is equipped with three gas nozzles 13, and the second regulating chamber 3 is equipped with one gas nozzle 13. When the first solenoid valve 9 and the second solenoid valve 10 are closed, the connection between the air intake chamber 4 and the first regulating chamber 2 and the second regulating chamber 3 is cut off. Gas entering the air intake chamber 4 can only be ejected from the two gas nozzles 13 in the first connecting channel 7 and the second connecting channel 8. These two gas nozzles 13 are normally open gas passages, preventing issues such as flameout and combustion vibration caused by switching between different sections. This forms a minimum heat load combustion mode, suitable for low-temperature demands when the inlet water temperature is high in summer and the user's water consumption is low. When the first solenoid valve 9 is closed and the second solenoid valve 10 is opened, the air intake chamber 4 is connected to the second regulating chamber 3, and the connection between the air intake chamber 4 and the first regulating chamber 2 is cut off. Gas can then be ejected from the three gas nozzles 13 in the first connecting channel 7, the second connecting channel 8, and the second regulating chamber 3, meeting the needs of medium to low load hot water supply. Demand: When the first solenoid valve 9 is opened and the second solenoid valve 10 is closed, the air intake chamber 4 is connected to the first regulating chamber 2, and the connection between the air intake chamber 4 and the second regulating chamber 3 is cut off. Gas can be ejected from the five gas nozzles 13 in the first connecting channel 7, the second connecting channel 8, and the first regulating chamber 2, which is suitable for medium to high load demand. When the first solenoid valve 9 is opened and the second solenoid valve 10 is opened, the air intake chamber 4 is connected to both the first regulating chamber 2 and the second regulating chamber 3. Gas can be ejected from the six gas nozzles 13 in the first connecting channel 7, the second connecting channel 8, the first regulating chamber 2, and the second regulating chamber 3, which activates the maximum heat load combustion mode for rapid heating. By opening and closing the two solenoid valves, four segmented modes are achieved, and the load overlap area of ​​each segmented mode is large, avoiding temperature fluctuations that may be caused by segmented combustion, which greatly improves the stability of the water heater operation.

[0019] Among the four segmented combustion methods, the number of gas nozzles 13 between each segment is small, and the overlap area of ​​gas volume is greatly expanded, effectively avoiding temperature fluctuations caused by sudden changes in gas volume during segment switching. It can operate stably even under low gas pressure conditions, significantly improving the constant temperature accuracy and user comfort of the water heater under different gas pressures and different water use scenarios. At the same time, the integrated chamber layout and optimized processing method not only reduce processing difficulty and shorten the production cycle, but also reduce the error risk caused by the opening of process holes during processing, improving product processing consistency and operational reliability.

[0020] Example 2 This embodiment is a further supplement to the above embodiment 1, and also includes a pressure test channel 14. The pressure test channel 14 is connected to the air intake chamber 4. The pressure test channel 14 is designed as a threaded hole, which can be directly threaded to the plug screw 15. A sealing gasket is provided between the two to further improve the sealing performance. During production and debugging, pressure measuring equipment (such as U-shaped pressure gauge, micro pressure gauge, etc.) can be directly connected to detect the gas pressure without disassembling the product, which greatly improves the debugging efficiency.

[0021] Example 3 This embodiment is a further supplement to embodiment 2 above. Both ends of the distribution pipe body 1 and the opening end of the air inlet chamber 4 are respectively provided with sealing plugs 16. The sealing plugs 16 and the distribution pipe body 1 are interference fit, which is simple to assemble and has a reliable sealing effect, reducing the risk of air leakage.

[0022] Finally, it should be noted that the above descriptions are merely preferred embodiments of this application and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A gas distribution pipe for a water heater, characterized in that, It includes a distribution pipe body (1), and a first adjustment chamber (2) and a second adjustment chamber (3) are coaxially formed inside the distribution pipe body (1); An air inlet chamber (4), a first solenoid valve (9) mounting cavity (5), and a second solenoid valve (10) mounting cavity (6) are also provided on the distribution pipe body (1). A first air inlet valve port (11) is provided on the first solenoid valve (9) mounting cavity (5) and communicates with the first regulating chamber (2). A second air inlet valve port (12) is provided on the second solenoid valve (10) mounting cavity (6) and communicates with the second regulating chamber (3). The air inlet chamber (4) is connected to the first solenoid valve (9) mounting cavity (5) and the second solenoid valve (10) mounting cavity (6) through a first connecting channel (7) and a second connecting channel (8), respectively. A first solenoid valve (9) is installed in the mounting cavity (5) of the first solenoid valve (9). The valve body of the first solenoid valve (9) is sealed to the port of the mounting cavity (5) of the first solenoid valve (9). The valve core of the first solenoid valve (9) is sealed to the first air inlet valve port (11). A second solenoid valve (10) is installed in the mounting cavity (6) of the second solenoid valve (10). The valve body of the second solenoid valve (10) is sealed to the port of the mounting cavity (6) of the second solenoid valve (10). The valve core of the second solenoid valve (10) is sealed to the second air inlet valve port (12). At least one gas nozzle (13) is installed on the distribution pipe body (1) corresponding to the first regulating chamber (2), the second regulating chamber (3), the first connecting channel (7), and the second connecting channel (8).

2. The gas distribution pipe for a water heater according to claim 1, characterized in that, The first connecting channel (7) and the second connecting channel (8) are at the same angle to the central axis of the distribution pipe body (1).

3. The gas distribution pipe for a water heater according to claim 2, characterized in that, The distribution pipe body (1) is also provided with a pressure test channel (14), which is connected to the air intake chamber (4); a plug screw (15) is threaded into the pressure test channel (14).

4. The gas distribution pipe for a water heater according to claim 1, characterized in that, Both ends of the distribution pipe body (1) and the opening end of the air inlet chamber (4) are respectively provided with sealing plugs (16), and the sealing plugs (16) are interference fit with the distribution pipe body (1).

5. The gas distribution pipe for a water heater according to claim 1, characterized in that, A circular arc protrusion is provided on the side of the first air inlet (11) near the mounting cavity (5) of the first solenoid valve (9) and on the side of the second air inlet (12) near the mounting cavity (6) of the second solenoid valve (10).

6. The gas distribution pipe for a water heater according to claim 1, characterized in that, One gas nozzle (13) is installed on the first connecting channel (7) and the second connecting channel (8), three gas nozzles (13) are installed in the first regulating chamber (2), and one gas nozzle (13) is installed in the second regulating chamber (3).

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