Three-way regulating device and gas water heater

Abstract

The present application belongs to the technical field of gas water heater, and discloses a three-way regulating device and a gas water heater. The three-way regulating device comprises a valve body, a core shaft and a driving piece. The valve body has a valve cavity. The valve body is provided with a total water inlet, a main water outlet and a bypass water outlet which can communicate with the valve cavity. The core shaft is arranged in the valve cavity. The core shaft is provided with a circumferentially protruding first valve core along the axial direction. The first valve core is located between the main water outlet and the bypass water outlet. The driving piece is configured to drive the core shaft to move in the axial direction in the valve cavity. When the core shaft moves in the axial direction, one of the opening A of the main water outlet and the opening B of the bypass water outlet gradually decreases while the other simultaneously gradually increases. The sum of the opening A and the opening B remains unchanged. The three-way regulating device of the present application has a simple structure, a small volume and a large adjustable ratio. During the adjustment process, there is no fluctuation in water quantity and water temperature. The adjustment process remains stable, and the problem of sudden change in water flow in the prior art is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of gas water heaters, and in particular to a three-way regulating device and a gas water heater. Background Art

[0002] During the use of gas water heaters, the flow rates of the main and bypass water lines need to be adjusted in real time based on the heat load and user needs. Currently, flow regulation in the bypass and main water lines requires separate water proportional valves, which are complex, require a large installation space, and are costly.

[0003] In order to solve the above problems, the existing technology arranges a main valve core and a bypass valve core on the core shaft or valve stem to adjust the flow of the total water inlet and the bypass water outlet respectively. However, the adjustment ratio is too small and cannot meet the use requirements of a high adjustment ratio. Moreover, during the adjustment process, the sudden change in the water flow area causes the overall water flow to change suddenly. Although the water heater will adjust the air flow accordingly (the corresponding inspection item in the national standard is water temperature overshoot, and the requirement is ±5K), large water temperature fluctuations will also occur. Summary of the Invention

[0004] One of the technical problems solved by the present invention is to provide a three-way regulating device, which can effectively solve the problems of too small regulation ratio of the three-way and sudden change of water flow.

[0005] The second technical problem solved by the present invention is to provide a gas water heater that can effectively solve the problems of too small three-way adjustment ratio and sudden change of water flow in the gas water heater.

[0006] The first technical problem mentioned above is solved by the following technical solution:

[0007] Three-way regulating device, comprising:

[0008] A valve body having a valve cavity and provided with a main water inlet, a main water outlet, and a bypass water outlet that can communicate with the valve cavity;

[0009] A core shaft is inserted into the valve cavity; the core shaft is provided with a first valve core protruding in the circumferential direction, and the first valve core is located between the main water outlet and the bypass water outlet;

[0010] a driving member configured to drive the core shaft to move along the axial direction within the valve cavity;

[0011] When the core shaft moves along the axial direction, the opening of the main water outlet is A, and the opening of the bypass water outlet is B. Among the openings A and B, one gradually decreases while the other gradually increases synchronously, and the sum of the openings A and B remains unchanged.

[0012] Compared with the background technology, the three-way regulating device of the present invention has the following beneficial effects:

[0013] The three-way regulating device of the present invention disposes a core shaft having a first valve core within the valve cavity. When the core shaft moves axially within the valve cavity, the opening A of the main water outlet and the opening B of the bypass water outlet gradually decrease while the other gradually increases synchronously, thereby greatly increasing the adjustable ratio. During the regulation process, the sum of the openings A and B remains unchanged, and the flow changes of the main water outlet and the bypass water outlet are synchronized. Therefore, the overall water resistance and water flow remain unchanged, and there will be no fluctuations in water volume and water temperature. The regulation process remains stable, avoiding the problem of sudden changes in water flow existing in the prior art. The three-way regulating device of the present invention only has a first valve core disposed on the core shaft, and has a simple structure and a small size.

[0014] In one embodiment, the effective water flow area of ​​the main water outlet and the bypass water outlet is equal.

[0015] In one embodiment, the main water inlet and the bypass water outlet are coaxially arranged along the radial direction of the valve body, and the main water outlet is arranged at one axial end of the valve body.

[0016] In one embodiment, when the first valve core completely closes the bypass water outlet, the axial distance L1 between the top end of the first valve core and the end of the main water outlet is equal to the axial width L2 of the bypass water outlet.

[0017] In one embodiment, a first through hole is provided on the valve body or the first valve core, and when the main water outlet is completely closed, the first through hole connects the main water inlet and the main water outlet.

[0018] In one embodiment, a second through hole is provided on the valve body or the valve core, and when the bypass water outlet is completely closed, the second through hole communicates with the main water inlet and the bypass water outlet.

[0019] In one embodiment, the main water inlet and the main water outlet are coaxially arranged along the radial direction of the valve body, and the bypass water outlet is arranged at one axial end of the valve body.

[0020] In one embodiment, a second valve core is provided on the core shaft, and the second valve core and the first valve core are spaced apart along the axial direction.

[0021] In one embodiment, after the first valve core closes the bypass water outlet, the second valve core continues to move along the closing direction of the bypass water outlet so that the water outlet area of ​​the main water outlet gradually changes.

[0022] The second technical problem mentioned above is solved by the following technical solution:

[0023] The gas water heater comprises the three-way regulating device, wherein the main water inlet, main water outlet and bypass water outlet of the three-way regulating device are respectively connected to the main water inlet pipe, main water outlet pipe and bypass water outlet pipe of the gas water heater.

[0024] Compared with the background technology, the gas water heater of the present invention has the following beneficial effects:

[0025] The gas water heater of the present invention utilizes a three-way regulating device having a first valve core, which has a simple structure and a small size. When the three-way regulating device is performing flow regulation, the core shaft moves axially within the valve chamber, and the opening A of the main water outlet and the opening B of the bypass water outlet gradually decrease while the other gradually increases synchronously, thereby greatly increasing the adjustable ratio. During the regulation process, the sum of the openings A and B remains unchanged, and the flow changes of the main water outlet and the bypass water outlet are synchronized. Therefore, the overall water resistance and water flow remain unchanged, and there will be no fluctuations in water volume and water temperature. The regulation process remains stable, avoiding the problem of sudden changes in water flow existing in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic cross-sectional view of a three-way regulating device provided in Example 1 of the present invention;

[0027] Figure 2 A schematic diagram of the three-dimensional structure of a three-way regulating device provided in Example 1 of the present invention;

[0028] Figure 3 This is a schematic diagram of a three-way regulating device provided in Example 1 of the present invention in a state where the bypass water outlet is closed;

[0029] Figure 4 This is a schematic diagram of a three-way regulating device provided in Example 1 of the present invention in a state where the main water outlet is closed;

[0030] Figure 5 A schematic cross-sectional view of a three-way regulating device provided in the second embodiment of the present invention;

[0031] Figure 6 This is a structural schematic diagram of a three-way regulating device provided in Example 3 of the present invention.

[0032] Description of labels:

[0033] 1. Valve body; 11. Valve chamber; 12. Main water inlet; 13. Main water outlet; 14. Bypass water outlet; 15. Second through hole; 2. Core shaft; 21. First valve core; 211. First through hole; 22. Second valve core; 3. Driving member. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application 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 understood as a limitation on the present application.

[0036] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0038] Example 1:

[0039] like Figures 1-4 As shown, the present invention provides a three-way regulating device, including a valve body 1, a core shaft 2 and a driving member 3, the valve body 1 has a valve cavity 11, and the valve body 1 is provided with a total water inlet 12, a main water outlet 13 and a bypass water outlet 14 that can be communicated with the valve cavity 11; the core shaft 2 is arranged in the valve cavity 11, and the core shaft 2 is provided with a circumferentially protruding first valve core 21 along its axial direction, and the first valve core 21 is located between the main water outlet 13 and the bypass water outlet 14; the driving member 3 is configured to drive the core shaft 2 to move in the valve cavity 11 along the axial direction; when the core shaft 2 moves in the axial direction, the opening of the main water outlet 13 is A, and the opening of the bypass water outlet 14 is B, and of the opening A and the opening B, one gradually decreases while the other gradually increases synchronously, and the sum of the opening A and the opening B remains unchanged.

[0040] The three-way regulating device of the present invention employs a core shaft 2 with a first valve core 21 disposed within a valve chamber 11. Compared to existing technologies, this device simplifies its structure, simplifies its control principle, and reduces its overall size. As the core shaft 2 moves axially within the valve chamber 11, the opening A of the main water outlet 13 and the opening B of the bypass water outlet 14 gradually decrease while the other gradually increases, significantly increasing the adjustable ratio.

[0041] Specifically, combined Figure 1 , the initial position of the first valve core 21 completely closes the bypass water outlet 14 and completely connects the main water outlet 13 and the total water inlet 12. When it is necessary to reduce the water flow of the main water outlet 13, the core shaft 2 moves toward the main water outlet 13, so that the gap between the first valve core 21 and the main water outlet 13 gradually becomes smaller until it is completely closed; synchronously, the gap between the first valve core 21 and the bypass water outlet 14 gradually becomes larger until it is fully connected; that is, the opening of the main water outlet 13 becomes smaller, so that the flow of the main water outlet 13 becomes smaller, and the opening of the bypass water outlet 14 becomes larger synchronously, so that the flow of the bypass water outlet 14 becomes larger. Since the main water outlet 13 and the bypass water outlet 14 change their openings synchronously, the water resistance and water flow of the total water inlet 12 will remain stable, and there will be no fluctuations in water flow and water temperature. Similarly, when it is necessary to increase the water flow rate of the main water outlet 13, the core shaft 2 moves in the opposite direction, that is, moves in the direction away from the main water outlet 13, so that the gap between the first valve core 21 and the main water outlet 13 gradually increases and opens until it is fully opened. At the same time, the gap between the first valve core 21 and the bypass water outlet 14 gradually decreases until it is fully closed; that is, the opening of the main water outlet 13 gradually increases, so that the flow rate of the main water outlet 13 gradually increases, and the opening of the bypass water outlet 14 gradually decreases synchronously, so that the flow rate of the bypass water outlet 14 gradually decreases synchronously. Since the main water outlet 13 and the bypass water outlet 14 are adjusted synchronously, the overall water resistance and water flow rate will remain consistent, and there will be no fluctuations in water flow rate and water temperature, and they will remain stable during the adjustment process; and since the opening of the main water outlet 13 and the bypass water outlet 14 is one increased while the other is reduced, the adjustable ratio is greatly increased.

[0042] During the above-mentioned adjustment process, the sum of the opening A and the opening B remains unchanged, the flow changes of the main water outlet 13 and the bypass water outlet 14 are synchronized, and the sum of the flow remains unchanged. Therefore, the overall water resistance and water flow remain unchanged, and there will be no fluctuations in water volume and water temperature. The adjustment process remains stable, avoiding the problem of sudden changes in water flow in the prior art.

[0043] In one embodiment, the effective water flow areas of the main water outlet 13 and the bypass water outlet 14 are equal.

[0044] For example, assuming the total opening of the main water outlet 13 and the bypass water outlet 14 is 10, when the opening of the main water outlet 13 is 9, the opening of the bypass water outlet 14 is 1, and the ratio of the two is 9 to 1. When the opening of the main water outlet 13 is 1, the opening of the bypass water outlet 14 is 9, and the ratio of the two is 1 to 9. In theory, the opening of the main water outlet 13 and the bypass water outlet 14 can be adjusted between 0 and 10. However, in the three-way adjustment process of the prior art, when the opening of the main water outlet 13 is 0, the opening of the bypass water outlet 14 is adjusted between 0 and 10, or when the opening of the bypass water outlet 14 is 0, the opening of the main water outlet 13 is adjusted between 0 and 10. The adjustment ratio is small, the adjustment flow rate is small, the overall water resistance is reduced, and the water flow rate may suddenly increase or decrease, causing water temperature fluctuations. It can be seen that this embodiment sets the effective water flow area of ​​the main water outlet 13 and the bypass water outlet 14 to be equal, that is, the opening degree is equal, which facilitates the control of the stability of the overall water flow of the three-way regulating device during the regulation process, and thus ensures that the water temperature fluctuation is small, meets the national standard for water temperature overshoot, and the overall water temperature overshoot is less than 5K.

[0045] In one embodiment, the main water inlet 12 and the bypass water outlet 14 are coaxially arranged along the radial direction of the valve body 1 , and the main water outlet 13 is arranged at one axial end of the valve body 1 .

[0046] like Figure 1 As shown, in one embodiment, the main water inlet 12 and the bypass outlet 14 are coaxially arranged on the circumference of the valve body 1, the main water outlet 13 and the driving member 3 are arranged at opposite ends of the axial direction of the valve body 1, and the first valve core 21 is located between the bypass outlet 14 and the main water outlet 13. The axial thickness of the first valve core 21 is greater than the axial opening size of the bypass outlet 14 so that the first valve core 21 can completely close the bypass outlet 14 when moving axially. When the first valve core 21 moves upward, the bypass outlet 14 gradually opens, and the water flow gradually increases. At the same time, the first valve core 21 gradually approaches the main water outlet 13 and the gap between them gradually decreases. The flow rate of the main water outlet 13 gradually decreases until the main water outlet 13 is completely closed and the bypass outlet 14 is fully opened. Conversely, the adjustment is synchronized. It can be seen that setting the main water inlet 12 and the bypass water outlet 14 in a coaxial position facilitates synchronous flow regulation of the main water outlet 13 and the bypass water outlet 14 through a first valve core 21, the water flow is stable, the water temperature fluctuation is small, and the regulation ratio is increased.

[0047] In one embodiment, when the first valve core 21 completely closes the bypass water outlet 14 , the axial distance L1 between the top of the first valve core 21 and the end of the main water outlet 13 is equal to the axial width L2 of the bypass water outlet 14 .

[0048] like Figure 3In the state shown, the axial distance between the top end (or top surface) of the first valve core 21 and the edge of the main water outlet 13 is L1, the thickness of the first valve core 21 is equal to the axial width L2 of the bypass water outlet 14 and the bypass water outlet 14 is completely closed. When the first valve core 21 moves upward to just completely close the edge of the main water outlet 13, water enters. Figure 4 , the bypass outlet 14 is just fully opened. During the upward movement of the first valve core 21, it is controlled by the driving member 3. Within this range of travel, the total water output of the main water outlet 13 and the bypass water outlet 14 and the water inlet of the total water inlet 12 remain stable and consistent. Therefore, the total water flow rate remains unchanged during the adjustment process, which is conducive to maintaining a stable water temperature and will not cause sudden changes in water flow rate. Moreover, the opening of the main water outlet 13 and the bypass water outlet 14 increases while the other decreases, so the adjustment ratio is large and the application range is wider.

[0049] In one embodiment, a first through hole 211 is provided on the valve body 1 or the first valve core 21 . When the main water outlet 13 is completely closed, the first through hole 211 communicates with the main water inlet 12 and the main water outlet 13 .

[0050] like Figure 4 The first through hole 211 connects the upper and lower end surfaces of the first valve core 21. When the main water outlet 13 is fully closed, the main water outlet 13 and the main water inlet 12 can still be partially connected, thereby avoiding excessive adjustment of the water flow rate. It should be noted that the aperture of the first through hole 211 is much smaller than the aperture of the main water outlet 13. In some embodiments, the first through hole 211 can also be provided on the valve body 1, specifically on both sides of the main water outlet 13, so that when the main water outlet 13 is fully closed, the first through hole 211 connects the main water inlet 12 and the main water outlet 13.

[0051] In one embodiment, a second through hole 15 is provided on the valve body 1 or the first valve core 21 . When the bypass water outlet 14 is completely closed, the second through hole 15 communicates with the main water inlet 12 and the bypass water outlet 14 .

[0052] like Figure 3As shown, the second through hole 15 is provided on the valve body 1 below the bypass water outlet 14. The second through hole 15 connects the valve cavity 11 and the bypass water outlet 14. When the first valve core 21 moves to completely close the bypass water outlet 14, a small amount of water still connects the total water inlet 12 and the bypass water outlet 14 through the second through hole 15, which can avoid excessive adjustment of the water flow. It should be noted that the aperture of the second through hole 15 is much smaller than the aperture of the bypass water outlet 14. In some embodiments, under the premise of satisfying the above-mentioned excessive adjustment effect, the second through hole 15 can also be provided on the first valve core 21, and the two ends of the second through hole 15 are respectively connected to the bottom end face of the first valve core 21 and the end face facing the bypass water outlet 14. When the bypass water outlet 14 is closed, the total water inlet 12 and the bypass water outlet 14 can also be connected through the second through hole 15.

[0053] Example 2:

[0054] like Figure 5 As shown, on the basis of the technical solution adopted in Example 1, unlike Example 1, the positions of the main water outlet 13 and the bypass water outlet 14 can be interchanged, the total water inlet 12 and the main water outlet 13 are coaxially arranged along the radial direction of the valve body 1, and the bypass water outlet 14 is arranged at one axial end of the valve body 1, and the other parts are the same as Example 1.

[0055] It can be understood that when the driving member 3 drives the core shaft 2 to move, the first valve core 21 adjusts the water flow between the main water outlet 13 and the bypass water outlet 14. The adjustment ratio is large, the water flow is stable, and the water temperature overshoot is less than 5K, which meets the national standard requirements.

[0056] Example 3:

[0057] like Figure 6 As shown, based on the second embodiment, this embodiment is provided with a second valve core 22 on the core shaft 2, and the second valve core 22 is spaced apart from the first valve core 21 in the axial direction. The second valve core 22 is used to further implement the regulating function of the water proportional valve on the basis of the first valve core 21, that is, to further adjust the water flow.

[0058] In one embodiment, after the first valve core 21 closes the bypass water outlet 14 , the second valve core 22 continues to move along the closing direction of the bypass water outlet 14 so that the water outlet area of ​​the main water outlet 13 gradually changes.

[0059] In this embodiment, as the first valve core 21 moves upward in the axial direction, gradually reducing the gap between the first valve core 21 and the main water outlet 13, the gap between the first valve core 21 and the bypass water outlet 14 increases, achieving high-proportional regulation while maintaining the total flow rate of the main water outlet 13 opening A and the bypass water outlet 14 opening B. When the bypass water outlet 14 is completely closed, the main water outlet 13 has a maximum flow rate. At this time, the core shaft 2 continues to move upward, and the second valve core 22 moves upward accordingly, gradually reducing the flow rate of the main water outlet 13, thereby reducing the overall flow rate and achieving the function of the water proportional valve to regulate the water flow rate. On the contrary, after the second valve core 22 completely closes the main water outlet 13, it reaches the final state; the driving member 3 drives the core shaft 2 to move downward, and the second valve core 22 gradually opens the main water outlet 13 downward and the flow gradually increases until the main water outlet 13 is just located between the second valve core 22 and the first valve core 21 and is fully opened. At this time, the water outlet of the three-way regulating device is the water outlet of the main water outlet 13, and the three-way regulating device has the regulating function of the water proportional valve; the core shaft 2 continues to move downward, and the gap between the first valve core 21 and the main water outlet 13 gradually becomes smaller, and the gap between the first valve core 21 and the bypass water outlet 14 gradually becomes larger. The water outlet is kept stable, which is conducive to maintaining the stability of water flow and water temperature, avoiding sudden changes in water flow, and has a larger regulation ratio at this time.

[0060] Example 4:

[0061] The gas water heater includes the three-way regulating device provided in Example 1, Example 2 or Example 3, and the total water inlet, main water outlet and bypass water outlet of the three-way regulating device are respectively connected to the total water inlet pipe, main water outlet pipe and bypass water outlet pipe of the gas water heater.

[0062] Compared to the background art, the gas water heater of the present invention uses a three-way regulating device with a first valve core 21, which has a simple structure and a small size. When using a core shaft 2 with a first valve core 21 and a second valve core 22, while achieving stable constant flow regulation and a large flow regulation ratio, it can also realize the function of a water proportional valve. When the three-way regulating device with a first valve core 21 of the present invention is performing flow regulation, the core shaft 2 moves axially within the valve chamber 11, and the opening A of the main water outlet 13 and the opening B of the bypass water outlet 14 gradually decrease while the other gradually increases synchronously, thereby greatly increasing the adjustable ratio. During the regulation process, the sum of the openings A and B remains unchanged, and the flow changes of the main water outlet 13 and the bypass water outlet 14 are synchronized. Therefore, the overall water resistance and water flow remain unchanged, and there will be no fluctuations in water volume and water temperature. The regulation process remains stable, avoiding the problem of sudden changes in water flow in the prior art.

[0063] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The specific contents of the above-mentioned specific embodiments merely represent several embodiments of the present invention. While the description is relatively specific and detailed, it should not be construed as limiting the scope of protection of the present invention. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the spirit of the present invention, and such modifications and improvements fall within the scope of protection of the present invention. The scope of protection of the present invention shall be determined by the appended claims.

Claims

1. Three-way regulating device, characterized in that: include: A valve body (1), the valve body (1) having a valve cavity (11), the valve body (1) being provided with a main water inlet (12), a main water outlet (13), and a bypass water outlet (14) capable of communicating with the valve cavity (11); A core shaft (2) is provided in the valve cavity (11); the core shaft (2) is provided with a circumferentially protruding first valve core (21), and the first valve core (21) is located between the main water outlet (13) and the bypass water outlet (14); a first through hole (211) is provided on the first valve core (21) or the valve body (1), and when the main water outlet (13) is fully closed, the first through hole (211) communicates with the main water inlet (12) and the main water outlet (13); a second through hole (15) is provided on the valve body (1) or the first valve core (21), and when the bypass water outlet (14) is fully closed, the second through hole (15) communicates with the main water inlet (12) and the bypass water outlet (14); a driving member (3), the driving member (3) being configured to drive the core shaft (2) to move in the axial direction within the valve cavity (11); When the core shaft (2) moves along the axial direction, the opening of the main water outlet (13) is A, and the opening of the bypass water outlet (14) is B. Of the openings A and B, one gradually decreases while the other gradually increases synchronously, and the sum of the openings A and B remains unchanged.

2. The three-way regulating device according to claim 1, characterized in that: The effective water flow areas of the main water outlet (13) and the bypass water outlet (14) are equal.

3. The three-way regulating device according to claim 1, characterized in that: The main water inlet (12) and the bypass water outlet (14) are coaxially arranged along the radial direction of the valve body (1), and the main water outlet (13) is arranged at one axial end of the valve body (1).

4. The three-way regulating device according to claim 3, characterized in that: When the first valve core (21) completely closes the bypass water outlet (14), the axial distance L1 between the top end of the first valve core (21) and the end edge of the main water outlet (13) is equal to the axial width L2 of the bypass water outlet (14).

5. The three-way regulating device according to claim 1, characterized in that: The main water inlet (12) and the main water outlet (13) are coaxially arranged along the radial direction of the valve body (1), and the bypass water outlet (14) is arranged at one axial end of the valve body (1).

6. The three-way regulating device according to claim 5, characterized in that: A second valve core (22) is provided on the core shaft (2), and the second valve core (22) and the first valve core (21) are spaced apart along the axial direction.

7. The three-way regulating device according to claim 6, characterized in that: After the first valve core (21) closes the bypass water outlet (14), the second valve core (22) continues to move along the closing direction of the bypass water outlet (14) so ​​that the water outlet area of ​​the main water outlet (13) gradually changes.

8. Gas water heater, characterized in that It comprises a three-way regulating device according to any one of claims 1 to 7.

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