Valve device and gas water heater

Abstract

The utility model discloses a valve device and gas water heater relates to water heater technical field. Among them, valve device includes valve body, fixed cover subassembly and valve core subassembly, and valve body is equipped with valve cavity and with valve cavity communication's water inlet channel, first water outlet channel, second water outlet channel and mounting port, and first water outlet channel has with valve cavity communication's first water pass -through, and second water outlet channel has with valve cavity communication's second water pass -through, valve body is equipped with with mounting port connection's first guide structure in the inner wall surface of valve cavity, fixed cover subassembly is installed in valve cavity through mounting port, and the outer wall surface of fixed cover subassembly is equipped with second guide structure, and second guide structure is limited with first guide structure and cooperates, valve core subassembly is installed in fixed cover subassembly, and can rotate in valve cavity to adjust the water flow of first water pass -through and second water pass -through. The utility model technical scheme can prevent fixed cover subassembly and valve body assembly deviation, guarantee valve device's assembly quality, promote assembly efficiency.

Description

Technical Field

[0001] This utility model relates to the field of water heater technology, and in particular to a valve device and a gas water heater. Background Technology

[0002] As people's living standards continue to improve, their pursuit of bathing comfort is increasing. Gas water heaters, with their fast heating speed and large water volume, have become the preferred type of water heater for many users. However, gas water heaters can experience significant temperature fluctuations when the water volume fluctuates, such as sudden changes in water temperature, and the water temperature fluctuating considerably when the water is turned off and then on again, resulting in the water being hot initially and then cold later.

[0003] In related technologies, valve devices are installed in hot water systems to solve the problem of large fluctuations in outlet water temperature. However, when the valve core and shielding parts in the valve devices of these technologies are installed onto the valve body, installation misalignment is prone to occur, resulting in low assembly efficiency. Utility Model Content

[0004] The main purpose of this invention is to provide a valve device that aims to improve the assembly efficiency of the valve device.

[0005] To achieve the above objectives, the valve device proposed in this utility model includes:

[0006] The valve body is provided with a valve cavity and an inlet channel, a first outlet channel, a second outlet channel and an installation port communicating with the valve cavity. The first outlet channel has a first water inlet communicating with the valve cavity, and the second outlet channel has a second water inlet communicating with the valve cavity. The valve body is also provided with a first guide structure on the inner wall surface of the valve cavity that is connected to the installation port.

[0007] A fixing sleeve assembly is installed in the valve cavity via the mounting port. The outer wall surface of the fixing sleeve assembly is provided with a second guide structure, which engages with the first guide structure for limiting positioning.

[0008] The valve core assembly is installed in the fixed sleeve assembly and can rotate within the valve cavity to adjust the flow rate of the first water inlet and the second water inlet.

[0009] In one embodiment of this application, one of the first guide structure and the second guide structure is a guide groove, and the other is a guide rib.

[0010] In one embodiment of this application, the mounting port is located at one axial end of the valve cavity, and the first guide structure extends axially along the valve cavity.

[0011] In one embodiment of this application, the first guide structure has at least two, and the at least two first guide structures are distributed at circumferential intervals along the valve cavity;

[0012] The second guide structure has at least two, and the at least two second guide structures are spaced apart along the outer peripheral surface of the fixed sleeve assembly.

[0013] In one embodiment of this application, the valve body is provided with a first anti-fooling structure at the mounting port, and the first anti-fooling structure is offset from the first guide structure;

[0014] The outer end of the fixed sleeve assembly is provided with a second anti-mistake structure for cooperating with the first anti-mistake structure.

[0015] In one embodiment of this application, the first anti-mistake structure is an anti-mistake groove formed at the end of the valve body, and the second anti-mistake structure is an anti-mistake protrusion formed on the fixing sleeve assembly.

[0016] In one embodiment of this application, the inner wall of the valve cavity is provided with a first limiting stop, and the outer wall of the fixed sleeve assembly is provided with a second limiting stop;

[0017] The first limiting stop is used to limit and stop the second limiting stop when the fixed sleeve assembly is inserted into the valve cavity through the mounting port.

[0018] In one embodiment of this application, the fixing sleeve assembly includes:

[0019] A fixed sleeve is sealed and installed at the mounting port; the second guide structure is disposed on the outer peripheral surface of the fixed sleeve; and the valve core assembly is installed on the fixed sleeve.

[0020] The first shielding member is fixedly connected to one end of the fixed sleeve near the valve cavity, and the first shielding member is provided with a water outlet;

[0021] When the fixing sleeve is installed at the mounting port, the first shielding member cooperates with the peripheral wall of the valve cavity to align and communicate with the first water inlet; the valve core assembly rotates with the first shielding member to adjust the opening of the water inlet.

[0022] In one embodiment of this application, the first shielding member and the fixing sleeve are an integral structure.

[0023] In one embodiment of this application, the first shielding member is a cylindrical body, the outer peripheral surface of the first shielding member is tightly fitted with the peripheral wall surface of the valve cavity, and the water inlet penetrates the inner and outer peripheral surfaces of the first shielding member.

[0024] The valve core assembly rotates with the inner circumferential surface of the first shielding member to block or open the water inlet.

[0025] In one embodiment of this application, the fixed sleeve is provided with an assembly hole; the valve core assembly includes a rotating shaft installed in the assembly hole and a first valve core and a second valve core fixedly connected to the rotating shaft. The first valve core rotates in cooperation with the first blocking member to block or open the water inlet, and the second valve core is used to rotate within the valve cavity to adjust the opening degree of the second water inlet.

[0026] To achieve the above objectives, this application also provides a gas water heater, including an inlet pipe, an outlet pipe, a heat exchanger, and the aforementioned valve device. The inlet channel is connected to the inlet pipe, and one of the first outlet channel and the second outlet channel is connected to the inlet end of the heat exchanger, while the other is connected to the outlet pipe.

[0027] In the valve device of this utility model, the valve body is provided with a valve cavity and an inlet channel, a first outlet channel, and a second outlet channel communicating with the valve cavity. The first outlet channel has a first water inlet, and the second outlet channel has a second water inlet. A rotatable valve core assembly is provided in the valve cavity, which can adjust the water flow rate of the first water inlet and the water flow rate of the second water inlet, so as to realize the water volume distribution function of the first outlet channel and the second outlet channel. When the valve device of this embodiment is applied to a gas water heater, it can adjust the water flow rate of the first outlet channel and the second outlet channel according to different operating conditions of the gas water heater, which can improve the water temperature fluctuation and improve the constant temperature performance. In addition, the valve body is provided with an installation port that communicates with the valve cavity. The inner wall of the valve cavity is provided with a first guide structure that connects to the installation port, and the outer wall of the fixed sleeve assembly is provided with a second guide structure. Thus, when the fixed sleeve assembly is inserted into the valve cavity from the installation port, the first guide structure can cooperate with the second guide structure to limit and guide the insertion process of the fixed sleeve assembly, thereby preventing the fixed sleeve assembly from being misaligned with the valve body, ensuring the assembly quality of the valve device, and improving assembly efficiency. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of an embodiment of the valve device of this utility model;

[0030] Figure 2 This is an exploded view of an embodiment of the valve device of this utility model;

[0031] Figure 3This is a schematic diagram showing the fit between the valve body, valve core assembly, and fixing sleeve assembly of this utility model;

[0032] Figure 4 for Figure 3 Cross-sectional view of the embodiment;

[0033] Figure 5 This is a schematic diagram of the valve body in an embodiment of the present invention;

[0034] Figure 6 This is a schematic diagram of the structure of the fixing sleeve assembly in an embodiment of this utility model;

[0035] Figure 7 This is a schematic diagram of the structure of one embodiment of the valve core assembly in this utility model;

[0036] Figure 8 This is an axial schematic diagram of the valve body in an embodiment of this utility model;

[0037] Figure 9 This is a schematic diagram of an embodiment of the gas water heater of this utility model.

[0038] Explanation of icon numbers:

[0039] label name label name 100 Valve device 22 Second valve core 1 Valve body 22a Outlet 101 valve chamber 221 Protruding shaft 101a Perimeter wall 23 Rotation axis 11 Inlet channel 231 Second limiting part 111 Water inlet 3 Driver components 12 First water outlet channel 40 Fixed sleeve assembly 121 First water inlet 4 Fixing sleeve 13 Second water outlet channel 41 Assembly holes 131 Second water inlet 411 First limiting section 14 Second shielding component 401 Second limit stop 141 Mounting holes 402 Second guiding structure 15 Installation port 403 Second foolproof structure 101 First limit stop 5 First shielding component 102 First guiding structure 501 water outlet 103 First foolproof structure 200 Inlet pipe 2 Valve core assembly 300 water outlet pipe 21 First valve core 400 heat exchanger 211 stop

[0040] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0042] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0043] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0044] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0045] Gas water heaters often experience significant temperature fluctuations when water flow changes, such as sudden changes in water temperature, or the water temperature changing drastically after being turned off and on again. Related technologies address this by incorporating a valve into the hot water system. However, the valve core and shielding components in these valve devices are prone to misalignment when installed onto the valve body, leading to inefficient assembly.

[0046] Therefore, this utility model proposes a valve device to improve the assembly efficiency of the valve device. It is understood that... Figure 9 The valve device 100 is used in a gas water heater, which includes an inlet pipe 200, an outlet pipe 300, and a heat exchanger 400. The valve device 100 is connected between the inlet pipe 200, the inlet end of the heat exchanger 400, and the outlet pipe 300. By adjusting the amount of water entering the inlet end of the heat exchanger 400 and the outlet pipe 300, the fluctuation of the outlet water temperature can be improved, and the constant temperature performance can be enhanced. The structure of this valve device 100 will be described below with reference to an embodiment.

[0047] like Figures 1 to 3 As shown, the valve device 100 includes a valve body 1, a fixing sleeve assembly 40, and a valve core assembly 2. The valve body 1 has a valve cavity 101 and an inlet channel 11, a first outlet channel 12, a second outlet channel 13, and an installation port 15 communicating with the valve cavity 101. The first outlet channel 12 has a first water inlet 121 communicating with the valve cavity 101, and the second outlet channel 13 has a second water inlet 131 communicating with the valve cavity 101. The valve body 1 also has a first guide structure 102 on the inner wall of the valve cavity 101 that is connected to the installation port 15. The fixing sleeve assembly 40 is installed in the valve cavity 101 via the installation port 15. The outer wall of the fixing sleeve assembly 40 has a second guide structure 402, which is in a limiting fit with the first guide structure 102. The valve core assembly 2 is installed in the fixing sleeve assembly 40 and can rotate within the valve cavity 101 to adjust the flow rate of the first water inlet 121 and the second water inlet 131.

[0048] The valve body 1 serves as the outer shell of the valve device 100. The valve body 1 is provided with a valve cavity 101, an inlet channel 11, a first outlet channel 12, and a second outlet channel 13. It can be understood that water flowing into the valve cavity 101 from the inlet channel 11 can flow out from the first outlet channel 12 and / or the second outlet channel 13. Specifically, the first outlet channel 12 has a first inlet 121 communicating with the valve cavity 101, and the second outlet channel 13 has a second inlet 131 communicating with the valve cavity 101. The flow rate of the first inlet 121 and the second inlet 131 can be adjusted by the valve core assembly 2 located in the valve cavity 101 to adjust the water output of the first outlet channel 12 and the second outlet channel 13, thereby enabling the distribution of water output in different outlet channels to be adjusted according to actual needs. In practical applications, the inlet channel 11 can be selected as an inlet pipe, and the first outlet channel 12 and the second outlet channel 13 can be selected as outlet pipes to facilitate pipe installation.

[0049] It should be noted that in this embodiment, the valve cavity 101, the inlet channel 11, the first outlet channel 12, and the second outlet channel 13 are all formed in the valve body 1. The inlet channel 11, the first outlet channel 12, and the second outlet channel 13 are independent of the valve cavity 101 and are connected to the valve cavity 101 through corresponding water inlets. Specifically, the first water inlet 121 is located at the connection between the first outlet channel 121 and the valve cavity 101, the second water inlet 131 is located at the connection between the second outlet channel 131 and the valve cavity 101, and the inlet water inlet 111 is located at the connection between the inlet channel 11 and the valve cavity 101. That is, the valve cavity 101 and the first outlet channel 121 are located on both sides of the first water inlet 121, the valve cavity 101 and the second outlet channel 131 are located on both sides of the second water inlet 131, and the valve cavity 101 and the inlet channel 11 are located on both sides of the inlet water inlet 111.

[0050] Understandably, the relative positions of the inlet channel 11, the first outlet channel 12, and the second outlet channel 13 with the valve chamber 101 can be determined according to actual conditions. For example, one or two of the inlet channel 11, the first outlet channel 12, and the second outlet channel 13 may be located along the axial direction of the valve chamber 101, and the remaining ones may be located at an angle to the axial direction of the valve chamber 101; alternatively, the inlet channel 11, the first outlet channel 12, and the second outlet channel 13 may all be located along the axial direction of the valve chamber 101 or all may be located at an angle to the axial direction of the valve chamber 101. As an example, such as... Figure 4As shown, valve cavity 101 is a cavity whose axial direction is parallel to the plane of the paper and extends laterally. Water inlet channel 11 is a channel that extends approximately radially along valve cavity 101 (i.e., water inlet channel 11 extends radially along valve cavity 101 or is slightly inclined), and communicates with valve cavity 101 through water inlet port 111. In some embodiments, water inlet port 111 is located on the peripheral wall of valve cavity 101. First water outlet channel 12 is a channel that extends approximately radially along valve cavity 101 (i.e., first water outlet channel 12 extends radially along valve cavity 101 or is slightly inclined), and communicates with valve cavity 101 through first water inlet port 121. In some embodiments... The first water inlet 121 is located on the peripheral wall of the valve cavity 101; the second water outlet channel 13 is a channel that extends approximately radially along the valve cavity 101 (i.e., the second water outlet channel 13 extends radially along the valve cavity 101 or is slightly inclined), and communicates with the valve cavity 101 through the second water inlet 131. In some embodiments, the second water inlet 131 may be located on the peripheral wall of the valve cavity 101 or at one axial end. It should be noted that when the second water inlet 131 is located at one axial end of the valve cavity 101, the second water outlet channel 13 is located on one axial side of the valve cavity 101, and the second water inlet 131 is located on the side wall of the second water outlet channel 13. In some embodiments, the mounting port 15 is located at one axial end of the valve cavity 101.

[0051] Understandably, this valve device 100 achieves the function of distributing the water flow through the rotational movement of the valve core assembly 2. To facilitate the rotational movement of the valve core assembly 2, the valve cavity 101 can be set as a cylindrical cavity, and the valve core assembly 2 rotates around the central axis of the valve cavity 101.

[0052] The valve body 1 is also provided with an installation port 15 communicating with the valve cavity 101. The installation port 15 serves to allow the insertion of internal components of the valve device 100, such as the valve core assembly 2 and the shielding component. The fixing sleeve assembly 40 serves to install and support the internal components of the valve body 1, such as the valve core assembly 2 and the shielding component. By providing a first guide structure 102 connected to the installation port 15 on the inner wall of the valve cavity 101, and a second guide structure 402 on the outer wall of the fixing sleeve assembly 40, when the fixing sleeve assembly 40 is inserted into the valve cavity 101 from the installation port 15, the first guide structure 102 can cooperate with the second guide structure 402 to limit and guide the insertion process of the fixing sleeve assembly 40. This prevents the fixing sleeve assembly 40 from being misaligned with the valve body 1, thereby ensuring the fitting accuracy of the valve core assembly 2 on the fixing sleeve assembly 40 and the corresponding features on the valve body 1 (such as the first water inlet 121 / second water inlet 131, etc.), and ensuring the control accuracy of the valve device 100.

[0053] In this embodiment, through the limiting and guiding effect of the first guide structure 102 and the second guide structure 402, when the fixed sleeve assembly 40 is assembled to the valve body 1, it is only necessary to align and install the second guide structure 402 with the first guide structure 102 to achieve the positioning and assembly of the fixed sleeve assembly 40 and the valve body 1, thereby improving the assembly efficiency of the valve device 100.

[0054] Understandably, during actual assembly, the valve core assembly 2 can be assembled onto the fixed sleeve assembly 40 outside the valve body 1 to form a whole assembly. Then, the whole assembly can be inserted into the valve cavity 101 through the mounting port 15. At this time, due to the cooperation between the first guide structure 102 and the second guide structure 402, the operator can directly hold the fixed sleeve assembly 40, align the second guide structure 402 with the first guide structure 102, and then insert it into the valve cavity 101 through the mounting port 15 to achieve quick assembly.

[0055] It should be noted that the specific structure of the first guide structure 102 can be determined according to the actual situation, such as a guide groove structure, a guide rib structure, a magnetic guide structure, or some other guide structure. Correspondingly, the specific structure of the second guide structure 402 can also be determined according to the actual situation, such as a guide rib structure, a guide groove structure, a magnetic guide structure, or some other guide structure. In practical applications, the specific location of the mounting port 15 can be determined according to the actual situation, for example, it can be on the peripheral wall surface 101a of the valve cavity 101 or at the axial end. The shape and structure of the mounting port 15 can also be determined according to the actual situation, for example, it can be a circular port, a square port, a polygonal port, or some other shaped port.

[0056] When this valve device 100 is applied to a water heater, the inlet channel 11 is connected to the inlet pipe 200, and one of the first outlet channel 12 and the second outlet channel 13 is connected to the inlet end of the heat exchanger 400, while the other is connected to the outlet pipe 300. The following explanation uses the example of the first outlet channel 12 being connected to the inlet end of the heat exchanger 400 and the second outlet channel 13 being connected to the outlet pipe 300 as an example:

[0057] Regarding the temperature rise during water outages, when the water heater is turned on again after being turned off, the valve core assembly 2 rotates, reducing or closing the water flow at the first water inlet 121, while simultaneously increasing the opening of the second water inlet 131. This allows more cold water to flow out from the second outlet and into the outlet pipe 300, thereby reducing the overall water temperature and resolving the temperature rise issue during water outages, preventing users from being scalded by hot water.

[0058] Regarding fluctuations during secondary startup, when the water heater is turned off and then turned on again, the valve core assembly 2 rotates, reducing the water flow rate at the first water inlet 121 and increasing the opening of the second water inlet 131. This lowers the outlet water temperature to the required temperature, mitigating the issue of temperature rise during water outages. Then, after the device starts up, the valve core assembly 2 continues to rotate, increasing the water flow rate at the first water inlet 121 and decreasing the opening of the second water inlet 131. This reduces the amount of cold water mixed into the outlet pipe 300, preventing excessive drops in the overall outlet water temperature. Therefore, the water temperature at the user's end is kept stable during secondary startup, avoiding sudden temperature changes.

[0059] Regarding water flow fluctuations, when the water flow suddenly increases, the water temperature will decrease. At this time, the valve core assembly 2 rotates, reducing the opening of the second water inlet 131 and decreasing the amount of cold water mixed into the outlet pipe 300, preventing the outlet water temperature from dropping too much. Conversely, when the water flow suddenly decreases, the water temperature will rise. At this time, the valve core assembly 2 rotates, increasing the opening of the second water inlet 131 and increasing the amount of cold water mixed into the outlet pipe 300, preventing the outlet water temperature from rising too much. This ensures a stable water temperature at the user's end when the water flow fluctuates.

[0060] In summary, in the valve device 100 of this utility model, the valve body 1 is provided with a valve cavity 101 and an inlet channel 11, a first outlet channel 12, and a second outlet channel 13 connected to the valve cavity 101. The first outlet channel 12 has a first water inlet 121, and the second outlet channel 13 has a second water inlet 131. A rotatable valve core assembly 2 is provided in the valve cavity 101, which can adjust the water flow rate of the first water inlet 121 and the water flow rate of the second water inlet 131, thereby realizing the water distribution function of the first outlet channel 12 and the second outlet channel 13. When the valve device 100 of this embodiment is applied to a gas water heater, it can adjust the water flow rate of the first outlet channel 12 and the second outlet channel 13 according to different operating conditions of the gas water heater, thereby improving water temperature fluctuation and enhancing constant temperature performance. In addition, the valve body 1 is provided with an installation port 15 communicating with the valve cavity 101. The inner wall surface of the valve cavity 101 is provided with a first guide structure 102 connected to the installation port 15, and the outer wall surface of the fixed sleeve assembly 40 is provided with a second guide structure 402. Thus, when the fixed sleeve assembly 40 is inserted into the valve cavity 101 from the installation port 15, the first guide structure 102 can cooperate with the second guide structure 402 to limit and guide the insertion process of the fixed sleeve assembly 40, thereby preventing the fixed sleeve assembly 40 from being misaligned with the valve body 1, ensuring the assembly quality of the valve device 100, and improving the assembly efficiency.

[0061] In one embodiment of this application, as Figure 2 , Figure 5 as well as Figure 6 One of the first guide structure 102 and the second guide structure 402 is a guide groove, and the other is a guide rib.

[0062] The guiding action of the guide groove and the guide rib can simplify the structural design of the two guide structures, thereby simplifying the structural design of the valve body 1 and the fixed sleeve assembly 40, thus reducing the manufacturing difficulty of the valve body 1 and the fixed sleeve assembly 40.

[0063] Optionally, the first guide structure 102 is a guide groove, and the second guide structure 402 is a guide rib. The extending direction of the guide groove and the guide rib can be consistent with the insertion direction of the fixing sleeve assembly 40.

[0064] Furthermore, such as Figure 2 , Figure 5 as well as Figure 6 The mounting port 15 is located at one axial end of the valve cavity 101, and the first guide structure 102 extends along the axial direction of the valve cavity 101.

[0065] In this embodiment, by setting the mounting port 15 at one axial end of the valve cavity 101, the fixing sleeve assembly 40 and the valve core assembly 2 can be inserted into the valve cavity 101 from the mounting port 15 along the axial direction of the valve cavity 101. Compared with the insertion method from other directions, the valve core assembly 2 in this embodiment is easier to position and the operation is simpler.

[0066] By extending the first guide structure 102 along the axial direction of the valve cavity 101, and correspondingly extending the second guide structure 402 along the axial direction of the fixed sleeve assembly 40, the second guide structure 402 and the first guide structure 102 can play a guiding and limiting role when the fixed sleeve assembly 40 is inserted along the axial direction, thereby further improving the assembly reliability of the valve device 100.

[0067] To further improve assembly stability, such as Figure 2 , Figure 5 as well as Figure 6 In one embodiment, at least two first guide structures 102 are distributed circumferentially along the valve cavity 101; at least two second guide structures 402 are distributed circumferentially along the outer peripheral surface of the fixed sleeve assembly 40.

[0068] In this embodiment, by setting at least two first guide structures 102 and at least two second guide structures 402, the first guide structures 102 and the second guide structures 402 guide and limit the movement, so that when the fixed sleeve assembly 40 is inserted into the valve cavity 101, the circumferential force of the fixed sleeve assembly 40 can be balanced, preventing the fixed sleeve assembly 40 from tilting during the insertion process, thereby improving the assembly reliability and assembly efficiency of the fixed sleeve assembly 40 and the valve body 1.

[0069] Preferably, the number of first guide structures 102 is the same as the number of second guide structures 402. During assembly, the first guide structures 102 and the second guide structures 402 are matched one-to-one. In this way, the force on the periphery of the fixed sleeve assembly 40 is more balanced, avoiding skewing or jamming, and further improving assembly efficiency.

[0070] To further improve assembly efficiency, such as Figure 2 , Figure 3 , Figure 5 as well as Figure 6 In one embodiment of this application, the valve body 1 is provided with a first anti-foolproof structure 103 at the mounting port 15, and the first anti-foolproof structure 103 is offset from the first guide structure 102; the outer end of the fixed sleeve assembly 40 is provided with a second anti-foolproof structure 403 for cooperating with the first anti-foolproof structure 103.

[0071] Understandably, in this embodiment, in addition to the guiding and limiting cooperation structure of the first guide structure 102 and the second guide structure 402 mentioned above, a foolproof cooperation structure is also provided. Specifically, the valve body 1 is provided with a first foolproof structure 103 at the mounting port 15, and the fixing sleeve assembly 40 is provided with a second foolproof structure 403. Through the cooperation between the second foolproof structure 403 and the first foolproof structure 103, the fixing sleeve assembly 40 and the valve body 1 are prevented from being installed in the wrong position, which can improve the assembly accuracy of the valve device 100 and improve the assembly efficiency.

[0072] It should be noted that in practical applications, at least two first guide structures 102 on the peripheral wall of the valve cavity 101 can be configured as identical structures, eliminating the need for separate design for a single first guide structure 102 and simplifying the manufacturing process. Correspondingly, at least two second guide structures 402 on the fixed sleeve assembly 40 can also be configured as identical structures to match the first guide structure 102, again eliminating the need for separate design for a single second guide structure 402 and simplifying the manufacturing process. However, the first guide structure 102 and the second guide structure 402 may not provide sufficient circumferential positioning for the fixed sleeve assembly 40 and the valve body 1. Therefore, this embodiment uses a first anti-misalignment structure 103 offset from the first guide structure 102, and a second anti-misalignment structure 403 offset from the second anti-misalignment structure 403 on the fixed sleeve assembly 40. The cooperation between the second anti-misalignment structure 403 and the first anti-misalignment structure 103 ensures accurate assembly by limiting the circumferential position of the fixed sleeve assembly 40 and the valve body 1.

[0073] Optionally, the first anti-mistake structure 103 is an anti-mistake groove formed at the end of the valve body 1, and the second anti-mistake structure 403 is an anti-mistake protrusion formed on the fixed sleeve assembly 40. During installation, the anti-mistake protrusion engages with the anti-mistake groove to position the fixed sleeve assembly 40 and the valve body 1, thereby improving assembly efficiency.

[0074] To further improve assembly quality, such as Figures 4 to 6 The inner wall of the valve cavity 101 is provided with a first limiting stop 101, and the outer wall of the fixed sleeve assembly 40 is provided with a second limiting stop 401; the first limiting stop 101 is used to limit and stop the second limiting stop 401 when the fixed sleeve assembly 40 is inserted into the valve cavity 101 through the mounting port 15.

[0075] In this embodiment, a first limiting stop 101 is provided on the inner wall of the valve cavity 101, and a second limiting stop 401 is provided on the outer wall of the fixing sleeve assembly 40. When the fixing sleeve assembly 40 drives the valve core assembly 2 to be inserted into the valve cavity 101, the first limiting stop 101 and the second limiting stop 401 can play an axial limiting role on the fixing sleeve assembly 40, thereby playing an installation and positioning role for the valve core assembly 2.

[0076] Optionally, the first limiting stop 101 can be a protruding structure on the peripheral wall surface 101a of the valve cavity 101. To ensure a better stopping effect, preferably, the first limiting stop 101 is an annular boss structure. Correspondingly, the second limiting stop 401 can be a protruding structure on the outer peripheral surface of the fixing sleeve assembly 40. To ensure a better stopping effect, preferably, the second limiting stop 401 is an annular boss structure.

[0077] In one embodiment of this application, as Figure 2 , Figure 4 , Figure 5 as well as Figure 6 The fixed sleeve assembly 40 includes a fixed sleeve 4 and a first blocking member 5. The fixed sleeve 4 is sealed and installed in the installation port 15. The second guide structure 402 is provided on the outer peripheral surface of the fixed sleeve 4. The valve core assembly 2 is installed in the fixed sleeve 4. The first blocking member 5 is fixedly connected to one end of the fixed sleeve 4 near the valve cavity 101. The first blocking member 5 is provided with a water passage 501. When the fixed sleeve 4 is installed in the installation port 15, the first blocking member 5 cooperates with the inner wall surface of the valve cavity 101 so that the water passage 501 is aligned and connected with the first water inlet 121. The valve core assembly 2 is rotatably engaged with the first blocking member 5 to adjust the opening degree of the water passage 501.

[0078] In this embodiment, the fixing sleeve 4 serves to install and support the first blocking member 5 and the valve core assembly 2. The first blocking member 5 is provided with a water passage 501 for communicating with the first water inlet 121. The opening degree of the water passage 501 is adjusted by the rotational cooperation between the valve core assembly 2 and the first blocking member 5, thereby adjusting the water flow rate through the first water inlet 121. By setting the first blocking member 5, which is independent of the valve body 1, and cooperating with the valve core assembly 2 for water passage, the manufacturing difficulty of the valve body 1 structure can be reduced, and the structural design of the valve core assembly 2 can be simplified.

[0079] The first shielding member 5 is fixedly connected to the end of the fixing sleeve 4 near the valve cavity 101. The valve core assembly 2 is mounted on the fixing sleeve 4. Therefore, before assembling it onto the valve body 1, the first shielding member 5 and the valve core assembly 2 can be mounted on the fixing sleeve 4 to form a single assembly. Since both the first shielding member 5 and the valve core assembly 2 are engaged and limited by the fixing sleeve 4, the operator can simply hold the fixing sleeve 4 to pick up the entire assembly and insert it into the valve cavity 101 through the mounting port 15 to complete the assembly. Thus, compared to the related technologies where the shielding member is only connected to the valve core, requiring the operator to simultaneously hold the valve core, the shielding member, and the fixing sleeve 4 for installation, this embodiment effectively reduces assembly difficulty and improves assembly efficiency.

[0080] Optionally, the first shielding member 5 is a cylindrical body, and the outer peripheral surface of the first shielding member 5 is tightly fitted with the peripheral wall surface 101a of the valve cavity 101. The water inlet 501 penetrates the inner and outer peripheral surfaces of the first shielding member 5. The valve core assembly 2 is rotatably engaged with the inner peripheral surface of the first shielding member 5 to block or open the water inlet 501.

[0081] By setting the first shielding member 5 as a cylindrical structure, the outer peripheral surface of the first shielding member 5 is tightly fitted with the peripheral wall surface 101a of the valve cavity 101, which can prevent water from leaking out between the first shielding member 5 and the peripheral wall surface 101a of the valve cavity 101, thus ensuring the accuracy of flow control. The water inlet 501 penetrates the inner and outer peripheral surfaces of the first shielding member 5. At this time, the inner cavity of the first shielding member 5 is connected to the valve cavity 101, and the water inlet 501 is radially through. When the valve core assembly 2 rotates to block the water inlet 501, the water pressure can be used to increase the blocking force of the valve core assembly 2 on the water inlet 501.

[0082] Furthermore, such as Figure 6 The first shielding component 5 and the fixing sleeve 4 are an integral structure.

[0083] This design eliminates the need for assembling the first shielding component 5 with the fixing sleeve 4. During assembly, the valve core assembly 2 only needs to be installed onto the fixing sleeve 4, so that the first shielding component 5, the valve core assembly 2, and the fixing sleeve 4 can form a single component before being installed into the valve body 1, further simplifying the assembly steps and reducing assembly difficulty.

[0084] As an example, the first shielding member 5 and the fixing sleeve 4 are integrally formed. Optionally, when the fixing sleeve 4 is a plastic part, the first shielding member 5 and the fixing sleeve 4 can be integrally formed by molding or 3D printing; when the fixing sleeve 4 is a metal part, the first shielding member 5 and the fixing sleeve 4 can be integrally formed by casting.

[0085] Furthermore, such as Figure 4 and Figure 6The first water inlet 121 is located on the peripheral wall surface 101a of the valve cavity 101. By engaging the first blocking member 5 with the peripheral wall surface 101a of the valve cavity 101, the water outlet 501 is aligned and connected with the first water inlet 121. When the valve core assembly 2 rotates relative to the first blocking member 5, the outer peripheral surface of the valve core assembly 2 can block or open the water outlet 501, thereby adjusting the opening degree of the water outlet 501. It can be understood that the water outlet 501 is a radial water outlet, which can reduce the generation of eddies in the valve cavity 101 and reduce resistance.

[0086] In practical applications, the first shielding member 5 can be an arc structure or a cylindrical structure that mates with the peripheral wall surface 101a of the valve cavity 101. As an example, the first shielding member 5 is a cylindrical body. With this configuration, the outer peripheral surface of the first shielding member 5 is tightly fitted with the peripheral wall surface 101a of the valve cavity 101, and the water inlet 501 penetrates through the inner and outer peripheral surfaces of the first shielding member 5, which can prevent water from leaking out between the first shielding member 5 and the peripheral wall surface 101a of the valve cavity 101, thus ensuring the accuracy of flow control.

[0087] In one embodiment of this application, as Figures 2 to 4 as well as Figure 6 and Figure 7 The fixed sleeve 4 is provided with an assembly hole 41; the valve core assembly 2 includes a rotating shaft 23 installed in the assembly hole 41 and a first valve core 21 and a second valve core 22 fixedly connected to the rotating shaft 23. The first valve core 21 is rotatably engaged with the first blocking member 5 to block or open the water inlet 501. The second valve core 22 is used to rotate in the valve cavity 101 to adjust the opening degree of the second water inlet 131.

[0088] In this embodiment, the first valve core 21 rotates in conjunction with the first blocking member 5 to adjust the flow rate of the first water inlet 121, and the second valve core 22 rotates within the valve cavity 101 to adjust the flow rate of the second water inlet 131. Both the first valve core 21 and the second valve core 22 are fixedly connected to the rotating shaft 23. It can be understood that when the rotating shaft 23 rotates, it can drive the first valve core 21 and the second valve core 22 to rotate simultaneously. Therefore, the flow rate of the first water outlet channel 12 and the second water outlet channel 13 can be adjusted simply by driving the rotating shaft 23 to rotate. Optionally, the rotation axis of the rotating shaft 23 is aligned with the central axis of the valve cavity 101, and the first valve core 21 and the second valve core 22 rotate around the central axis of the valve cavity 101. Connecting the first valve core 21 and the second valve core 22 via the rotating shaft 23 further improves the structural reliability of the valve core assembly 2 during rotation and ensures the synchronous rotation of the first valve core 21 and the second valve core 22.

[0089] During assembly, the end of the rotating shaft 23 facing away from the second valve core 22 can be inserted into the assembly hole 41 of the fixed sleeve 4 and protrude from the assembly hole 41, so that the valve core assembly 2 is assembled with the fixed sleeve 4. At this time, since the first shielding member 5 and the fixed sleeve 4 are an integral structure, the valve core assembly 2, the first shielding member 5 and the fixed sleeve 4 form an integral assembly. Then, the integral assembly is inserted into the valve cavity 101 from the mounting port 15, and the assembly step is realized by sealing the fixed sleeve 4 with the mounting port 15. Further, the drive assembly 3 is installed on the fixed sleeve 4 and driven to connect with the rotating shaft 23, so as to realize the function of the drive assembly 3 driving the valve core assembly 2 to rotate.

[0090] Optionally, the drive assembly 3 is a stepper motor, and the portion of the rotating shaft 23 extending outside the fixing sleeve 4 can be a gear shaft for connection with the stepper motor drive. Optionally, the drive assembly 3 and the fixing sleeve 4 can be fixed with screws.

[0091] Furthermore, the assembly hole 41 is provided with a first limiting part 411, and the rotating shaft 23 is provided with a second limiting part 231; the second limiting part 231 is used to cooperate with the first limiting part 411 to limit the rotation angle of the rotating shaft 23. This arrangement can prevent the rotating shaft 23 from rotating too far and affecting the distribution of the water flow.

[0092] Optionally, the first limiting part 411 can be an arc-shaped rib provided on the wall of the assembly hole 41, so that the first limiting part 411 has two limiting surfaces along the circumferential direction. When the rotating shaft 23 rotates in the assembly hole 41, the two limiting surfaces can respectively abut against the second limiting part 231 on the rotating shaft 23 to limit the rotation angle of the rotating shaft 23.

[0093] In practical applications, the specific structures of the first valve core 21 and the second valve core 22 can be determined according to the actual situation. For example, they can be cylindrical structures, block 211 structures, disc structures, or some other shapes.

[0094] like Figure 4 and Figure 7Considering that the first valve core 21 and the first blocking member 5 rotate together to block or open the water inlet 501 to regulate the flow rate of the first water outlet channel 12, the first valve core 21 can be set as a stop block 211. Compared with a cylindrical structure, this reduces the mating area with the first blocking member 5 and lowers the movement resistance. Optionally, the first valve core 21 can be an arc-shaped block, a spherical block, a butterfly block, or some other shape structure. Preferably, the outer peripheral surface of the first valve core 21 is an arc surface, so that the shape of the outer peripheral surface of the first valve core 21 matches the shape of the inner peripheral surface of the first shielding member 5. Specifically, the outer peripheral surface of the first valve core 21 is basically tangent to the inner peripheral surface of the first shielding member 5. Here, "basically tangent" means that the outer peripheral surface of the first valve core 21 is in contact or basically in contact with the inner peripheral surface of the first shielding member 5, so that there is no flow gap or a very small flow gap between the outer peripheral surface of the first valve core 21 and the inner peripheral surface of the first shielding member 5, so as to further improve the sealing effect of the first valve core 21 on the water outlet 501.

[0095] Furthermore, such as Figure 4 , Figure 7 as well as Figure 8 A second blocking member 14 can be provided at the end of the valve cavity 101 axially opposite to the mounting port 15 inside the valve body 1. The second water inlet 131 is provided on the second blocking member 14. The second valve core 22 is rotatably engaged with the second blocking member 14 to block or open the second water inlet 131. It is understood that the valve core assembly 2 is installed into the valve cavity 101 via the mounting port 15. The second blocking member 14 is located at the end of the valve cavity 101 axially opposite to the mounting port 15. Therefore, the valve core assembly 2 only needs to be inserted from the mounting port 15 along the axial direction of the valve cavity 101 to allow the second valve core 22 to move and rotatably engage with the second blocking member 14. This eliminates the need for multiple installation operations on the valve core assembly 2 in different directions and for multiple positioning operations on the rotation center of the valve core assembly 2, further simplifying the installation operation and improving installation convenience. The specific structure of the second blocking member 14 can be determined according to the actual situation, such as a plate structure, block structure, cylindrical structure, or other structures. As an example, the second shielding member 14 is a shielding plate. Compared with other structures such as cylindrical or block structures, the shielding plate has a simpler structure and is easier to integrally mold inside the valve body 1, with a lower molding process difficulty. The shielding plate separates the second water outlet channel 13 from the valve cavity 101. The second water inlet 131 is located on the shielding plate or between the shielding plate and the peripheral wall surface 101a of the valve cavity 101, so that when the second valve core 22 rotates in the valve cavity 101, it can rotate relative to the shielding plate to block or open the second water inlet 131, thereby regulating the flow rate at the second water inlet 131.

[0096] Optionally, when the periphery of the baffle plate is connected to the peripheral wall surface 101a of the valve cavity 101, the second water inlet 131 is directly formed by an opening in the baffle plate. In this manner, when the second valve core 22 blocks the second water inlet 131, the second valve core 22 can cooperate with the plate surface around the second water inlet 131 to achieve a better water-blocking effect.

[0097] Optionally, the side of the baffle plate is provided with a notch, which is used to form a second water inlet 131 by surrounding the peripheral wall 101a of the valve cavity 101. This design makes it easier to mold and manufacture.

[0098] Understandably, the shape of the second water inlet 131 can be, for example, circular, fan-shaped, square, strip-shaped, or other shapes. The radial cross-sectional shape of the second valve core 22 can also be determined according to the actual situation, for example, it can be fan-shaped, square, circular, or other shapes. Considering that the second valve core 22 rotates within the valve cavity 101, in order to better block and allow water to pass through, in this embodiment, the second water inlet 131 is set as a fan-shaped hole with the central axis of the valve cavity 101 as the center. Correspondingly, the radial cross-section of the second valve core 22 is fan-shaped, so the outer peripheral surface of the second valve core 22 is an arc surface adapted to the peripheral wall surface 101a of the valve cavity 101. Specifically, the outer peripheral surface of the second valve core 22 is basically tangent to the peripheral wall surface 101a of the valve cavity 101. Here, "basically tangent" means that the outer peripheral surface of the second valve core 22 is in contact or basically in contact with the peripheral wall surface 101a of the valve cavity 101, so that there is no flow gap or a very small flow gap between the outer peripheral surface of the second valve core 22 and the peripheral wall surface 101a of the valve cavity 101, thereby further improving the sealing effect of the second valve core 22 on the second water inlet 131. The central angle of the second valve core 22 is larger than the central angle of the second water inlet 131. This setting allows the second valve core 22 to completely seal the second water inlet 131 during rotation, while the second valve core 22 can adjust the opening size of the second water inlet 131.

[0099] Optionally, such as Figure 4 , Figure 7 as well as Figure 8 The second valve core 22 is a baffle plate. The axial end face of the baffle plate is rotatably engaged with the axial end face of the baffle plate. It can be understood that the axial end face of the second valve core 22 is basically fitted with the axial end face of the baffle plate, so that there is no flow gap or a very small flow gap between the axial end face of the second valve core 22 and the axial end face of the baffle plate, so as to ensure the sealing effect of the second valve core 22 on the second water inlet 131.

[0100] Specifically, the second valve core 22 baffle is provided with a flow port 22a. Optionally, the flow port 22a can be a through hole or notch on the second valve core 22. When the second valve core 22 rotates, it can drive the flow port 22a to move relative to the second water inlet 131 to adjust the overlap area between the flow port 22a and the second water inlet 131. It can be understood that when the second valve core 22 rotates and causes the flow port 22a to overlap with the second water inlet 131, the valve cavity 101 and the second water outlet channel 13 are in a conductive state. The conductive area between the valve cavity 101 and the second water outlet channel 13 is adjusted by adjusting the overlap area. When the disc of the second valve core 22 completely blocks the second water inlet 131, the second water outlet channel 13 and the valve cavity 101 are in a disconnected state.

[0101] Specifically, the second shielding member 14 is provided with a mounting hole 141, and the second valve core 22 has a protruding shaft 221 on its axial end face away from the first valve core 21. When the valve core assembly 2 is inserted into the valve cavity 101 through the mounting port 15, the protruding shaft 221 is rotatably engaged in the mounting hole 141. It can be understood that the central axis of the mounting hole 141 is consistent with the central axis of the valve cavity 101, and the central axis of the protruding shaft 221 is consistent with the central axis of the valve cavity 101. During assembly, the mounting hole 141 and the protruding shaft 221 can play a role in the installation and positioning of the valve core assembly 2. Thus, when the valve core assembly 2 is inserted into the valve cavity 101 through the mounting port 15, the protruding shaft 221 of the second valve core 22 can be directly rotatably engaged in the mounting hole 141, so that the axial end face of the second valve core 22 engages with the plate surface of the shielding plate, without the need for additional positioning and limiting operations on the valve core assembly 2.

[0102] This utility model also proposes a gas water heater, such as Figure 9 The gas water heater includes an inlet pipe 200, an outlet pipe 300, a heat exchanger 400, and a valve device 100. The specific structure of the valve device 100 is as described in the above embodiments. Since this gas water heater adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. Among them, the inlet channel 11 is connected to the inlet pipe 200, and one of the first outlet channel 12 and the second outlet channel 13 is connected to the inlet end of the heat exchanger 400, and the other is connected to the outlet pipe 300.

[0103] The following explanation is based on the example of the first water outlet channel 12 being connected to the inlet end of the heat exchanger 400, and the second water outlet channel 13 being connected to the outlet pipe 300:

[0104] Regarding the temperature rise during water outages, when the water heater is turned on again after being turned off, the valve core assembly 2 rotates, reducing or closing the water flow at the first water inlet 121, while simultaneously increasing the opening of the second water inlet 131. This allows more cold water to flow out from the second outlet and into the outlet pipe 300, thereby reducing the overall water temperature and resolving the temperature rise issue during water outages, preventing users from being scalded by hot water.

[0105] Regarding fluctuations during secondary startup, when the water heater is turned off and then turned on again, the valve core assembly 2 rotates, reducing the water flow rate at the first water inlet 121 and increasing the opening of the second water inlet 131. This lowers the outlet water temperature to the required temperature, mitigating the issue of temperature rise during water outages. Then, after the device starts up, the valve core assembly 2 continues to rotate, increasing the water flow rate at the first water inlet 121 and decreasing the opening of the second water inlet 131. This reduces the amount of cold water mixed into the outlet pipe 300, preventing excessive drops in the overall outlet water temperature. Therefore, the water temperature at the user's end is kept stable during secondary startup, avoiding sudden temperature changes.

[0106] Regarding water flow fluctuations, when the water flow suddenly increases, the water temperature will decrease. At this time, the valve core assembly 2 rotates, reducing the opening of the second water inlet 131 and decreasing the amount of cold water mixed into the outlet pipe 300, preventing the outlet water temperature from dropping too much. Conversely, when the water flow suddenly decreases, the water temperature will rise. At this time, the valve core assembly 2 rotates, increasing the opening of the second water inlet 131 and increasing the amount of cold water mixed into the outlet pipe 300, preventing the outlet water temperature from rising too much. This ensures a stable water temperature at the user's end when the water flow fluctuates.

[0107] Therefore, it can be seen that the gas water heater provided in this application can improve the fluctuation of water temperature and enhance the constant temperature performance.

[0108] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A valve device, characterized in that, include: The valve body is provided with a valve cavity and an inlet channel, a first outlet channel, a second outlet channel and an installation port communicating with the valve cavity. The first outlet channel has a first water inlet communicating with the valve cavity, and the second outlet channel has a second water inlet communicating with the valve cavity. The valve body is also provided with a first guide structure on the inner wall surface of the valve cavity that is connected to the installation port. A fixing sleeve assembly is installed in the valve cavity via the mounting port. The outer wall surface of the fixing sleeve assembly is provided with a second guide structure, which engages with the first guide structure for limiting positioning. The valve core assembly is installed in the fixed sleeve assembly and can rotate within the valve cavity to adjust the flow rate of the first water inlet and the second water inlet.

2. The valve device as claimed in claim 1, characterized in that, One of the first guide structure and the second guide structure is a guide groove, and the other is a guide rib.

3. The valve device as claimed in claim 2, characterized in that, The mounting port is located at one axial end of the valve cavity, and the first guide structure extends along the axial direction of the valve cavity.

4. The valve device as claimed in claim 3, characterized in that, The first guide structure has at least two, and the at least two first guide structures are distributed at circumferential intervals along the valve cavity; The second guide structure has at least two, and the at least two second guide structures are spaced apart along the outer peripheral surface of the fixed sleeve assembly.

5. The valve device according to any one of claims 1 to 4, characterized in that, The valve body is provided with a first anti-fooling structure at the mounting port, and the first anti-fooling structure is offset from the first guide structure. The outer end of the fixed sleeve assembly is provided with a second anti-mistake structure for cooperating with the first anti-mistake structure.

6. The valve device as claimed in claim 5, characterized in that, The first anti-mistake structure is an anti-mistake groove formed at the end of the valve body, and the second anti-mistake structure is an anti-mistake protrusion formed on the fixed sleeve assembly.

7. The valve device according to any one of claims 1 to 4, characterized in that, The inner wall of the valve cavity is provided with a first limiting stop, and the outer wall of the fixed sleeve assembly is provided with a second limiting stop. The first limiting stop is used to limit and stop the second limiting stop when the fixed sleeve assembly is inserted into the valve cavity through the mounting port.

8. The valve device according to any one of claims 1 to 4, characterized in that, The fixing sleeve assembly includes: A fixed sleeve is sealed and installed at the mounting port; the second guide structure is disposed on the outer peripheral surface of the fixed sleeve; and the valve core assembly is installed on the fixed sleeve. The first shielding member is fixedly connected to one end of the fixed sleeve near the valve cavity, and the first shielding member is provided with a water outlet; When the fixing sleeve is installed at the mounting port, the first shielding member cooperates with the peripheral wall of the valve cavity to align and communicate with the first water inlet; the valve core assembly rotates with the first shielding member to adjust the opening of the water inlet.

9. The valve device as claimed in claim 8, characterized in that, The first shielding member and the fixing sleeve are an integral structure.

10. The valve device as claimed in claim 8, characterized in that, The first shielding member is a cylindrical body, and the outer peripheral surface of the first shielding member is tightly fitted with the peripheral wall surface of the valve cavity. The water inlet penetrates the inner and outer peripheral surfaces of the first shielding member. The valve core assembly rotates with the inner circumferential surface of the first shielding member to block or open the water inlet.

11. The valve device as claimed in claim 8, characterized in that, The fixed sleeve is provided with an assembly hole; the valve core assembly includes a rotating shaft installed in the assembly hole and a first valve core and a second valve core fixedly connected to the rotating shaft. The first valve core rotates in cooperation with the first shielding member to shield or open the water inlet, and the second valve core is used to rotate within the valve cavity to adjust the opening degree of the second water inlet.

12. A gas-fired water heater, characterized in that, It includes an inlet pipe, an outlet pipe, a heat exchanger, and a valve device as described in any one of claims 1 to 11, wherein the inlet channel is connected to the inlet pipe, and one of the first outlet channel and the second outlet channel is connected to the inlet end of the heat exchanger, and the other is connected to the outlet pipe.

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