Multi-gear flow splitting device and water heater

Abstract

The present invention discloses a multi-gear flow splitting device and a water heater. The water heater includes the multi-gear flow splitting device. The multi-gear flow splitting device includes a flow splitting pipe, a piston member, and a switching member. The flow splitting pipe is provided with a main channel and a plurality of output channels connected to the main channel. The piston member is connected to the flow splitting pipe and a plurality of piston members are provided corresponding to the output channels. The plurality of piston members respectively correspond to the plurality of output channels one by one. Each piston member can disconnect the corresponding output channel from the main channel. The switching member is connected to the flow splitting pipe. The switching member can drive the piston member to move and can change the number of the driven piston members, so that the corresponding number of output channels are opened and communicated with the main channel. By changing the number of piston members driven by the switching member, the number of output channels communicated with the main channel is changed, realizing the on-off control of the gas in a single output channel and the incremental and decremental change of the number of output channels for outputting gas.

Description

Technical Field

[0001] The present invention relates to the technical field of gas equipment, and particularly relates to a multi-gear flow splitting device and a water heater. Background Art

[0002] For existing gas water heaters, they generally include a burner and a flow splitting pipe assembly connected to the burner. The burner has multiple burners, and the flow splitting pipe assembly is provided with an electromagnetic valve and multiple output channels corresponding to the multiple burners one by one. The on-off gas condition of the output channels is controlled by the electromagnetic valve to control the on-off of the gas output to the burners. For the existing flow splitting pipe assembly, one electromagnetic valve on it generally controls the on-off of the gas in two to three output channels at the same time, so that each electromagnetic valve controls two to three burners. Such a setting method cannot realize the on-off control of the gas in a single output channel or the incremental and decremental change of the number of output channels for the output gas. The change degree of the fire power of the burner is relatively large, and it cannot well meet the usage requirements of different users; and if each electromagnetic valve is set to independently control the on-off of the gas in an output channel, such a setting method will increase the number of electromagnetic valves, and each electromagnetic valve also needs to be correspondingly configured with a control module, increasing the complexity of the system and resulting in an increase in production costs, which is not convenient for production and application. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. For this purpose, the present invention provides a multi-gear flow splitting device. By providing piston members corresponding to multiple output channels one by one, the piston members are driven to move by a switching member to control the on-off between the output channels and the main channel. By changing the number of piston members driven by the switching member, the number of output channels communicating with the main channel is changed. The structure is simple and reasonable, and it can realize the on-off control of the gas in a single output channel and the incremental and decremental change of the number of output channels for the output gas.

[0004] The present invention also provides a water heater having the multi-gear flow splitting device.

[0005] According to the multi-gear flow splitting device described in the first aspect embodiment of the present invention, it includes a flow splitting pipe, piston members and a switching member. The flow splitting pipe is provided with a main channel and multiple output channels communicating with the main channel. The piston members are connected to the flow splitting pipe and multiple piston members are provided corresponding to the output channels. The multiple piston members respectively correspond to the multiple output channels one by one. Each piston member can disconnect the corresponding output channel from the main channel. The switching member is connected to the flow splitting pipe. The switching member can drive the piston members to move and can change the number of piston members driven, so that the corresponding number of output channels are opened to communicate with the main channel.

[0006] The multi - gear flow - dividing device according to the embodiments of the present invention has at least the following beneficial effects: When in use, each output channel corresponds to a burner. The gas is input into the main channel of the flow - dividing pipe. By providing piston members corresponding one - to - one with a plurality of output channels, each piston member can separately disconnect or connect the corresponding output channel and the main channel. Driven by a switching member, the corresponding piston member moves, so that the corresponding output channel and the main channel are opened and connected, enabling the gas in the main channel to be output through the corresponding output channel. By changing the number of piston members driven by the switching member, the number of output channels communicating with the main channel is changed, and the number of output channels of the output gas is changed, thereby adjusting the firepower of the burner. The structure is simple and reasonable, and it can realize the on - off control of the gas in a single output channel and the incremental and decremental change of the number of output channels of the output gas, which is convenient for use.

[0007] According to some embodiments of the present invention, a plurality of the output channels are arranged at intervals along the axial direction of the main channel. A first communication port is provided between the main channel and the output channels. The piston member is slidably connected to the output channel and is provided with a plug portion capable of blocking the first communication port. The switching member has a shaft structure and is rotatably connected to the flow - dividing pipe. A rod portion corresponding to the switching member is provided on the piston member. The outer peripheral wall of the switching member can abut against the rod portion and can push the rod portion as the switching member rotates, so as to enable the piston member to move relative to the first communication port and release the plugging of the first communication port by the plug portion.

[0008] According to some embodiments of the present invention, a plurality of avoidance grooves are provided on the switching member. The plurality of avoidance grooves are arranged at intervals along the axial direction of the switching member and correspond one - to - one with the plurality of rod portions. The avoidance grooves are arranged around the circumferential direction of the switching member and have an arc - shaped groove structure. The radian corresponding to each avoidance groove increases along the axial direction of the switching member. The avoidance grooves can allow the corresponding rod portions to avoid and extend into them.

[0009] According to some embodiments of the present invention, a transition surface is provided between the groove bottom of the avoidance groove and the outer peripheral wall of the switching member.

[0010] According to some embodiments of the present invention, the switching member is rotatably arranged in the main channel.

[0011] According to some embodiments of the present invention, the switching member is connected with a driver, and the driver can drive the switching member to rotate.

[0012] According to some embodiments of the present invention, the piston member is connected with an elastic member, and the plug portion can block the first communication port under the action of the elastic member.

[0013] According to some embodiments of the present invention, the shunt pipe is further provided with an input channel and a solenoid valve channel. The input channel communicates with the main channel through the solenoid valve channel. A second communication port is provided between the solenoid valve channel and the main channel. The shunt pipe is connected with a solenoid valve capable of blocking the second communication port.

[0014] According to some embodiments of the present invention, a pressure measuring channel communicating with the main channel is provided on the shunt pipe.

[0015] The water heater according to the second aspect embodiment of the present invention includes the multi-stage shunt device according to the first aspect embodiment of the present invention above.

[0016] The water heater according to the embodiment of the present invention has at least the following beneficial effects: By adopting the above multi-stage shunt device, it can control the number of output channels of the output gas, realize the on-off control of the gas in a single output channel and the incremental and decremental change of the number of output channels of the output gas, so that the burner can realize the gradual adjustment of the firepower, and can better meet the usage requirements of different users.

[0017] The additional aspects and advantages of the present invention will be partly given in the following description, partly become obvious from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0018] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0019] Figure 1 is a schematic structural diagram of the multi-stage shunt device according to the embodiment of the present invention;

[0020] Figure 2 is Figure 1 the exploded structural diagram of the multi-stage shunt device in;

[0021] Figure 3 is Figure 2 the schematic structural diagram of the piston part and the elastic part in;

[0022] Figure 4 is Figure 1 one of the cross-sectional structural diagrams of the multi-stage shunt device in;

[0023] Figure 5 is Figure 4 the enlarged schematic diagram of part A in;

[0024] Figure 6 is Figure 1 the other cross-sectional structural diagram of the multi-stage shunt device in;

[0025] Figure 7For Figure 1 Schematic structural diagram of the switching member in

[0026] Figure 8 For Figure 7 Cross-sectional structural diagram of another perspective of the switching member in

[0027] Reference numerals:

[0028] Diversion pipe 100, main channel 101, output channel 102, first communication port 103, input channel 104, solenoid valve channel 105, second communication port 106, pressure measurement channel 107, solenoid valve 110, nozzle 120, plugging member 130;

[0029] Piston member 200, plug portion 210, rod portion 220;

[0030] Switching member 300, avoidance groove 301, transition surface 302;

[0031] Driver 400, elastic member 500. Detailed implementation manners

[0032] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0033] In the description of the present invention, it should be understood that if the orientation description is involved, such as the orientation or positional relationship indicated by up, down, etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0034] In the description of the present invention, if words such as several, greater than, less than, exceeding, above, below, within, etc. appear, among them, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including the present number, and above, below, within, etc. are understood as including the present number.

[0035] If the first and second are described only for the purpose of distinguishing technical features, they should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0036] In the description of the present invention, unless otherwise clearly defined, terms such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0037] Referring to Figure 1 、 Figure 2 and Figure 3 , a multi-gear flow splitting device includes a flow splitting pipe 100, a piston member 200, and a switching member 300. The flow splitting pipe 100 is provided with a main channel 101 and a plurality of output channels 102 communicating with the main channel 101. The piston member 200 is connected to the flow splitting pipe 100 and a plurality of piston members 200 are provided corresponding to the output channels 102. The plurality of piston members 200 respectively correspond to the plurality of output channels 102 one by one. Each piston member 200 can disconnect the corresponding output channel 102 from the main channel 101. The switching member 300 is connected to the flow splitting pipe 100. The switching member 300 can drive the piston member 200 to move and can change the number of the driven piston members 200, so that the corresponding number of output channels 102 are opened to communicate with the main channel 101.

[0038] It can be understood that as shown in Figure 1 、 Figure 2 and Figure 3 , the flow splitting pipe 100 is provided with seven output channels 102, and seven piston members 200 are correspondingly provided to respectively correspond to the seven output channels 102 one by one. A nozzle 120 is connected to the outlet end of each output channel 102 to spray and output gas through the nozzle 120. In use, each output channel 102 can correspond to a burner. Gas is input to the main channel 101 of the flow splitting pipe 100. Each piston member 200 can separately disconnect the corresponding output channel 102 from the main channel 101. The switching member 300 drives the corresponding piston member 200 to move, so that the corresponding output channel 102 is opened to communicate with the main channel 101, so that the gas in the main channel 101 can be output through the corresponding output channel 102. By changing the number of piston members 200 driven by the switching member 300, the number of output channels 102 communicating with the main channel 101 is changed, and the number of output channels 102 for outputting gas is changed, and the gas output of the corresponding number of burners is controlled to burn, and the firepower of the burner is adjusted. The structure is simple and reasonable. The switching member 300 can drive a single piston member 200 to move to realize the on-off control of the gas in a single output channel 102. By changing the number of piston members 200 driven by the switching member 300, the number of output channels 102 communicating with the main channel 101 can be increased from one to multiple or decreased from multiple to one, so that the burner can realize a gradual change in firepower adjustment, which is convenient to use.

[0039] In actual application, the specific structures of the piston member 200 and the switching member 300 can be set accordingly according to actual usage requirements, and will not be described in detail here. Specific descriptions will be given below.

[0040] In some embodiments, a plurality of output channels 102 are arranged at intervals along the axial direction of the main channel 101. A first communication port 103 is provided between the main channel 101 and the output channels 102. The piston member 200 is slidably connected to the output channels 102 and is provided with a plug portion 210 capable of blocking the first communication port 103. The switching member 300 has a shaft structure and is rotatably connected to the flow dividing pipe 100. A rod portion 220 corresponding to the switching member 300 is provided on the piston member 200. The outer peripheral wall of the switching member 300 can abut against the rod portion 220 and can push the rod portion 220 as the switching member 300 rotates, so that the piston member 200 can move relative to the first communication port 103 and the plug portion 210 can be disengaged from blocking the first communication port 103.

[0041] It can be understood that as Figure 2 , Figure 3 , Figure 4 and Figure 5 shown, seven output channels 102 are arranged at intervals along the axial direction of the main channel 101. The piston member 200 is slidably connected to the output channels 102 and can move up and down. Under normal conditions, the plug portion 210 blocks the first communication port 103, so as to disconnect the corresponding output channel 102 from the main channel 101. The switching member 300 has a shaft structure and is rotatably connected to the flow dividing pipe 100. In use, the switching member 300 can be rotated to make its outer peripheral wall abut against the rod portion 220. The outer peripheral wall of the switching member 300 can push the rod portion 220 as the switching member 300 rotates, so that the piston member 200 moves relative to the first communication port 103, and the plug portion 210 is disengaged from blocking the first communication port 103, so that the corresponding output channel 102 is opened to communicate with the main channel 101. Its structure is simple, which is convenient to realize that one or more piston members 200 can be driven by one switching member 300 and is convenient to use.

[0042] In actual application, the switching member 300 can also be movably connected to the flow dividing pipe 100. An inclined pushing surface is provided on the switching member 300. By moving the switching member 300 along the axial direction of the main channel 101, the inclined pushing surface pushes the piston members 200 one by one, so as to realize that one or more piston members 200 can be driven by one switching member 300. Moreover, the number of piston members 200 driven by it can be controlled by controlling the moving stroke of the switching member 300 along the axial direction of the main channel 101. Of course, there are various ways to realize that the switching member 300 can drive the piston member 200 to move and can change the number of piston members 200 driven. Specifically, it can be set accordingly according to actual usage requirements and will not be described in detail here. Specific descriptions of other ways will be given below.

[0043] In some embodiments, a plurality of avoidance grooves 301 are provided on the switching member 300. The plurality of avoidance grooves 301 are arranged at intervals along the axial direction of the switching member 300 and correspond to the plurality of rod portions 220 one by one. The avoidance grooves 301 are arranged around the circumferential direction of the switching member 300 and are in an arc-shaped groove structure. The radian corresponding to each avoidance groove 301 increases along the axial direction of the switching member 300. The avoidance groove 301 can allow the corresponding rod portion 220 to avoid and extend in.

[0044] It can be understood that, as Figure 4 , Figure 5 , Figure 7 and Figure 8 shown, seven avoidance grooves 301 are provided on the switching member 300. The seven avoidance grooves 301 are arranged at intervals along the axial direction of the switching member 300 and correspond to the seven rod portions 220 one by one. Under normal conditions, the lower end of the rod portion 220 avoids and extends into the avoidance groove 301. When the switching member 300 is rotated, the lower end of the rod portion 220 is disengaged from the avoidance groove 301, and the outer peripheral wall of the switching member 300 is used to push the rod portion 220 upward, so that the piston member 200 moves upward. Since the radian corresponding to each avoidance groove 301 increases along the axial direction of the switching member 300, the rotation angles required for different rod portions 220 to disengage from the corresponding avoidance grooves 301 are different. By controlling the incremental rotation angle of the switching member 300, the plurality of rod portions 220 are disengaged from the corresponding avoidance grooves 301 one by one, so that the number of piston members 200 that the switching member 300 can drive increases. Similarly, when the switching member 300 is rotated in the reverse direction, the plurality of rod portions 220 fall into the corresponding avoidance grooves 301 one by one, so that the number of piston members 200 that the switching member 300 can drive decreases, realizing the function that the switching member 300 can change the number of piston members 200 it drives. Its structure is simple, and the number of piston members 200 to be pushed can be controlled by controlling the rotation angle of the switching member 300, which is convenient for operation.

[0045] In actual application, in addition to setting the avoidance groove 301, the outer peripheral wall of the switching member 300 can also push the rod portion 220 by setting an arc-shaped convex structure. By controlling the change of the radian corresponding to different convex structures, the control of the number of rod portions 220 to be pushed is realized, or multiple sections of cams are provided on the switching member 300 to form a crankshaft structure, and the rod portion 220 is pushed by the cam. Specifically, it can be set according to actual use needs and will not be elaborated here.

[0046] In some embodiments, a transition surface 302 is provided between the bottom of the avoidance groove 301 and the outer peripheral wall of the switching member 300. It can be understood that, as Figure 7 and Figure 8As shown, a transition surface 302 is provided between the bottom of the avoidance groove 301 and the outer peripheral wall of the switching member 300, so that when the switching member 300 rotates, the displacement of the rod portion 220 between the avoidance groove 301 and the outer peripheral wall of the switching member 300 can achieve a relatively smooth transition, improving the stability and reliability of the pushing against the rod portion 220 and facilitating use. In actual application, the specific structure of the transition surface 302 can be changed accordingly according to actual use, and the transition surfaces 302 corresponding to each avoidance groove 301 can also be different, which is not limited here.

[0047] In some embodiments, the switching member 300 is rotatably disposed in the main channel 101. It can be understood that, as Figure 4 and Figure 6 shown, the switching member 300 is rotatably disposed in the main channel 101, and its connection structure is relatively simple, which is convenient for simplifying the structure of the flow dividing pipe 100, facilitating its manufacturing and processing, and facilitating production and application.

[0048] In actual application, the switching member 300 can also be rotatably disposed outside the flow dividing pipe 100, then the rod portion 220 needs to be correspondingly set to extend outside the flow dividing pipe 100 for the outer peripheral wall of the switching member 300 to push against it, or a channel for accommodating the switching member 300 can be additionally provided in the flow dividing pipe 100, which can be specifically set according to actual use needs, and those skilled in the art should all understand.

[0049] In some embodiments, the switching member 300 is connected to a driver 400, and the driver 400 can drive the switching member 300 to rotate. It can be understood that, as Figure 1 、 Figure 2 、 Figure 4 shown, by setting the driver 400 to drive the switching member 300 to rotate, the rotation angle of the switching member 300 can be accurately controlled in an electric control manner, improving the reliability of its use, and at the same time reducing the possibility of failures caused by human misoperation, which is convenient for use. In actual application, the driver 400 can be a servo motor or a stepper motor, etc., which can be specifically set according to actual use needs, and those skilled in the art should all understand.

[0050] In some embodiments, the piston member 200 is connected to an elastic member 500, and the plug portion 210 can block the first communication port 103 under the action of the elastic member 500. It can be understood that, as Figure 2 、 Figure 3 、 Figure 4 and Figure 5As shown, an elastic member 500 is connected to the upper end of the piston member 200. Under the action of the elastic member 500, the plug portion 210 seals the first communication port 103. When the switching member 300 drives the piston member 200 to move upward, the elastic member 500 is compressed, and the first communication port 103 is opened, and the corresponding output channel 102 is communicated with the main channel 101. When the switching member 300 rotates and resets, under the action of the elastic member 500, the rod portion 220 partially extends into the avoidance groove 301, and the plug portion 210 seals the first communication port 103 again to facilitate the reset of the piston member 200. Its structure is simple and convenient to use.

[0051] In actual application, the piston member 200 can also achieve its reset movement through a magnetic attraction structure, which can be specifically set according to actual usage needs, and those skilled in the art should all understand.

[0052] In some embodiments, the flow divider 100 is further provided with an input channel 104 and a solenoid valve channel 105. The input channel 104 is communicated with the main channel 101 through the solenoid valve channel 105. A second communication port 106 is provided between the solenoid valve channel 105 and the main channel 101, and the flow divider 100 is connected with a solenoid valve 110 capable of sealing the second communication port 106.

[0053] It can be understood that as Figure 1 、 Figure 2 and Figure 6 shown, in use, the solenoid valve 110 can be connected to the thermocouple of the burner or other detection components. The gas is input from the input channel 104 and transported to the solenoid valve channel 105. The opening and closing of the second communication port 106 are controlled by the solenoid valve 110. When it is detected that the burner goes out or other faults occur, the second communication port 106 is sealed by the solenoid valve 110, thereby disconnecting the gas input of the main channel 101 and realizing the functions of flameout protection or fault protection, improving the usage safety.

[0054] In actual application, the solenoid valve 110 can be a self - sucking solenoid valve, and its action is controlled electrically, or the solenoid valve 110 can be a top - opening solenoid valve. The second communication port 106 is opened by setting a corresponding top - opening structure on the switching member 300 to push the solenoid valve 110. The specific type of the solenoid valve 110 can be selected according to actual usage needs, and its specific composition is known to those of ordinary skill in the art, so it will not be described in detail here.

[0055] In some embodiments, a pressure - measuring channel 107 communicating with the main channel 101 is provided on the flow divider 100. It can be understood that as Figure 1 and Figure 2As shown, a pressure measurement channel 107 communicating with the main channel 101 is provided on the flow divider pipe 100. A plugging member 130 capable of plugging the pressure measurement channel 107 is detachably connected to the pressure measurement channel 107. When the pressure measurement channel 107 is used, the plugging member 130 is detached and a pressure measurement assembly is connected to detect the gas pressure in the main channel 101, so as to obtain the gas pressure condition in the main channel 101, facilitating the corresponding actions of other components according to its pressure condition and improving the use reliability and safety.

[0056] In actual application, the pressure measurement channel 107 can be set accordingly according to actual use needs. A pressure measurement assembly can be directly connected thereto, or the plugging member 130 can be detached and a pressure measurement assembly can be connected for use according to needs, without limitation here.

[0057] The water heater according to the second aspect embodiment of the present invention includes the multi-stage flow dividing device according to the first aspect embodiment of the present invention above.

[0058] The water heater according to the embodiment of the present invention, by adopting the above multi-stage flow dividing device, can control the number of output channels 102 of the output gas, realize the on-off control of the gas in a single output channel 102 and the incremental and decremental change of the number of output channels 102 of the output gas, enabling the burner to realize a gradual firepower adjustment and being able to better meet the use requirements of different users.

[0059] Since the other components of the water heater according to the embodiment of the present invention are known to those of ordinary skill in the art, they will not be described in detail here.

[0060] The embodiments of the present invention have been described in detail above with reference to the drawings, but the present invention is not limited to the above embodiments. Various changes can be made without departing from the spirit of the present invention within the knowledge scope of those of ordinary skill in the art.

Claims

1. A multi-gear flow splitting device, characterized in that include: A shunt pipe (100), the shunt pipe (100) being provided with a main channel (101) and a plurality of output channels (102) connected to the main channel (101), the plurality of output channels (102) being arranged at intervals along the axial direction of the main channel (101), and a first communication port (103) being provided between the main channel (101) and the output channels (102); a piston member (200) connected to the shunt pipe (100) and provided in plurality corresponding to the output channels (102), the plurality of piston members (200) corresponding to the plurality of output channels (102) respectively, the piston member (200) being slidably connected to the output channel (102) and provided with a plug portion (210) capable of blocking the first communication port (103) so as to disconnect the corresponding output channel (102) from the main channel (101); A switching member (300), the switching member (300) is in a rotating shaft structure and is rotatably connected to the shunt pipe (100), the switching member (300) is arranged in the main channel (101), the piston member (200) is provided with a rod portion (220) corresponding to the switching member (300), and the switching member (300) is provided with a plurality of avoidance grooves (301), the plurality of avoidance grooves (301) are arranged at intervals along the axial direction of the switching member (300) and correspond one-to-one with the plurality of rod portions (220) so as to allow the corresponding rod portions (220) to avoid and extend therein, the avoidance grooves (301) are arranged around the circumference of the switching member (300) and are in an arc-shaped groove structure, the arc corresponding to each of the avoidance grooves (301) increases along the axial direction of the switching member (300), and the avoidance grooves (301) are arranged at intervals along the axial direction of the switching member (300) and correspond one-to-one with the plurality of rod portions (220) so as to allow the corresponding rod portions (220) to avoid and extend therein, A transition curved surface (302) is provided between the bottom of the groove (220) of the switching member (300) and the outer peripheral wall of the switching member (300); the rod portion (220) can extend into or escape from the corresponding avoidance groove (301) through the transition curved surface (302) as the switching member (300) rotates, and the rod portion (220) can be pushed and moved by the switching member (300) when escaping from the avoidance groove (301), so as to drive the piston member (200) to move relative to the first communication port (103) and release the blocking of the first communication port (103) by the plug portion (210); the switching member (300) can change the number of the driven piston members (200) by changing the rotation angle, so as to open communication between the corresponding number of the output channels (102) and the main channel (101).

2. The multi-speed flow diversion device according to claim 1, characterized in that: The switching member (300) is connected to a driver (400), and the driver (400) can drive the switching member (300) to rotate.

3. The multi-speed flow diversion device according to claim 1, characterized in that: The piston member (200) is connected with an elastic member (500), and the plug portion (210) can block the first communication port (103) under the action of the elastic member (500).

4. The multi-stage flow dividing device according to claim 1, wherein The flow dividing pipe (100) is further provided with an input channel (104) and a solenoid valve channel (105). The input channel (104) communicates with the main channel (101) through the solenoid valve channel (105). A second communication port (106) is provided between the solenoid valve channel (105) and the main channel (101). The flow dividing pipe (100) is connected with a solenoid valve (110) capable of blocking the second communication port (106).

5. The multi-stage flow dividing device according to claim 1, wherein A pressure measuring channel (107) communicating with the main channel (101) is provided on the flow dividing pipe (100).

6. A water heater, characterized in that, Comprising the multi-stage flow dividing device according to any one of claims 1 to 5.

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