Valve device and gas water heater

Abstract

The utility model discloses a valve device and gas water heater, valve device includes valve body and valve core subassembly, and valve body is equipped with valve cavity and with the water inlet channel, first water outlet channel and second water outlet channel of valve cavity intercommunication, and first water outlet channel has with the first water pass -through of valve cavity intercommunication, and second water outlet channel has with the second water pass -through of valve cavity intercommunication, first water pass -through is located in the peripheral wall surface of valve cavity, valve core subassembly includes the rotation axle of rotation in the valve cavity and the first valve core and second valve core of fixedly being equipped with the rotation axle and being spaced, and first valve core is rotated with the peripheral wall surface of valve cavity and is shielded or open first water pass -through, is used for adjusting the on -off area of valve cavity and first water outlet channel, and second valve core rotates in the valve cavity to shield or open second water pass -through, is used for adjusting the on -off area of valve cavity and second water outlet channel. The utility model discloses technical scheme the utility model discloses technical scheme can reduce the fluctuation range of gas water heater water temperature, and promotes the constant temperature performance.

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.

[0003] However, gas water heaters in related technologies have problems such as fluctuating water temperature when the water volume fluctuates, and large fluctuations in outlet water temperature when the water is turned off and then turned on again during use, such as the water being hot at first and then cold. Utility Model Content

[0004] The main purpose of this invention is to propose a valve device and a gas water heater, which aims to reduce the fluctuation range of the outlet water temperature of the gas water heater and improve the constant temperature performance.

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

[0006] The valve body includes 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 communicating with the valve cavity, and the second outlet channel has a second water inlet communicating with the valve cavity. The first water inlet is located on the peripheral wall of the valve cavity.

[0007] The valve core assembly includes a rotating shaft rotatably disposed in the valve cavity and a first valve core and a second valve core fixedly disposed on the rotating shaft and spaced apart from each other. The first valve core rotates with the peripheral wall of the valve cavity to block or open the first water inlet, thereby adjusting the conduction area between the valve cavity and the first water outlet channel. The second valve core rotates within the valve cavity to block or open the second water inlet, thereby adjusting the conduction area between the valve cavity and the second water outlet channel.

[0008] In one embodiment of this application, when the conductive area between the valve cavity and the first water outlet channel increases, the conductive area between the valve cavity and the second water outlet channel decreases.

[0009] When the conductive area between the valve cavity and the first water outlet channel decreases, the conductive area between the valve cavity and the second water outlet channel increases.

[0010] In one embodiment of this application, the first valve core is a stop block, and the outer peripheral surface of the stop block is rotatably engaged with the peripheral wall surface of the valve cavity to block or open the first water inlet;

[0011] The outer circumferential surface of the stop block is a circular arc surface or a spherical surface.

[0012] In one embodiment of this application, the outer peripheral surface of the stop is an arc surface, and the central angle A1 corresponding to the outer peripheral surface of the stop satisfies: 80°≤A1≤180°.

[0013] In one embodiment of this application, the radial cross-section of the stop is fan-shaped.

[0014] In one embodiment of this application, the second water inlet is located at one axial end of the valve cavity, and the second valve core rotates within the valve cavity to block or open the second water inlet.

[0015] In one embodiment of this application, a baffle plate is provided inside the valve body. The baffle plate is located at one axial end of the valve cavity to separate the second water outlet channel from the valve cavity. The periphery of the baffle plate is connected to the peripheral wall of the valve cavity, and the second water inlet is formed by an opening in the baffle plate. Alternatively, the baffle plate is provided with a notch to surround the peripheral wall of the valve cavity to form the second water inlet.

[0016] The axial end face of the second valve core rotates with the baffle plate to block or open the second water inlet.

[0017] In one embodiment of this application, the second water inlet is a fan-shaped hole with the central axis of the valve cavity as its center;

[0018] The radial cross-section of the second valve core is fan-shaped; the central angle of the second valve core is greater than the central angle of the second water inlet.

[0019] In one embodiment of this application, the central angle A2 of the second valve core satisfies 180°≤A2≤280°.

[0020] In one embodiment of this application, the first valve core and the second valve core are respectively located on both radial sides of the rotating shaft.

[0021] In one embodiment of this application, the second valve core is a baffle. ， The axial end face of the baffle plate is rotatably engaged with the axial end face of the baffle plate.

[0022] The second valve core is provided with a flow port. When the second valve core rotates, it can drive the flow port to move relative to the second water inlet, so as to adjust the overlap area between the flow port and the second water inlet.

[0023] In one embodiment of this application, the shield plate is provided with a mounting hole, and the axial end face of the second valve core is provided with a protruding shaft, which is rotatably fitted into the mounting hole.

[0024] In one embodiment of this application, the baffle plate and the valve body are integrally formed.

[0025] In one embodiment of this application, the valve body is further provided with an installation port communicating with the valve cavity;

[0026] The valve device further includes a fixing sleeve and a drive assembly installed on the fixing sleeve. The fixing sleeve is sealed and installed at the mounting port, and the fixing sleeve is provided with an assembly hole.

[0027] The rotating shaft seal fits into the mounting hole and extends out of the mounting hole to drive the connection with the drive assembly.

[0028] In one embodiment of this application, the assembly hole is provided with a first limiting part, and the rotating shaft is provided with a second limiting part; the second limiting part is used to limit the rotation angle of the rotating shaft by engaging with the first limiting part.

[0029] In one embodiment of this application, the valve device further includes a flow sensor, which is disposed in the water inlet channel.

[0030] 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.

[0031] In this utility model's valve device, the valve body has 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 communicates with the valve cavity through a first inlet, and the second outlet channel communicates with the valve cavity through a second inlet. A valve core assembly is provided within the valve cavity. This valve core assembly includes a rotating shaft and a first valve core and a second valve core mounted on the rotating shaft. By placing the first inlet on the peripheral wall of the valve cavity, the first valve core rotates to engage with the peripheral wall of the valve cavity to block or open the first inlet, adjusting the conduction area between the valve cavity and the first outlet channel. The second valve core blocks or opens the second inlet, adjusting the conduction area between the valve cavity and the second outlet channel, thereby achieving the water distribution function between the first and second outlet channels. When this valve device is applied to a gas water heater, it can adjust the water flow of the first and second outlet channels according to different operating conditions of the gas water heater, improving water temperature fluctuations and enhancing temperature control performance. Furthermore, by placing the first water inlet on the peripheral wall of the valve cavity, this embodiment can reduce water flow resistance and ensure water flow rate. Attached Figure Description

[0032] 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.

[0033] Figure 1 This is a schematic diagram of the structure of an embodiment of the valve device of this utility model;

[0034] Figure 2 This is a cross-sectional view of an embodiment of the valve device of this utility model;

[0035] Figure 3 This is an exploded view of an embodiment of the valve device of this utility model;

[0036] Figure 4 This is a schematic diagram of the structure of one embodiment of the valve core assembly in this utility model;

[0037] Figure 5 for Figure 4 Another perspective on the embodiments;

[0038] Figure 6 This is a schematic diagram of the valve body from another perspective in an embodiment of this utility model;

[0039] Figure 7 This is a schematic diagram of the valve core and the fixing assembly in an embodiment of this utility model;

[0040] Figure 8 This is a schematic diagram of an embodiment of the gas water heater of this utility model.

[0041] Explanation of icon numbers:

[0042] label name label name 100 Valve device 21 First valve core 1 Valve body 211 stop 101 valve chamber 22 Second valve core 101a Perimeter wall 22a Outlet 11 Inlet channel 221 Protruding shaft 111 Water inlet 23 Rotation axis 12 First water outlet channel 231 Second limiting part 121 First water inlet 3 Driver components 13 Second water outlet channel 4 Fixing sleeve 131 Second water inlet 41 Assembly holes 14 Blind 411 First limiting section 141 Mounting holes 200 Inlet pipe 15 Installation port 300 water outlet pipe 2 Valve core assembly 400 heat exchanger

[0043] 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

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] Gas water heaters in related technologies often experience significant fluctuations in outlet water temperature during use, mainly due to the following reasons: 1. Temperature rise during water outage: When the water is turned off, the heat stored in the heat exchanger heats the water to a very high temperature, leading to excessively high outlet water temperature when the water is turned back on; 2. Fluctuations during restart: When the water is turned off and then turned back on during use, the aforementioned temperature rise during water outage may occur, resulting in excessively high outlet water temperature. Additionally, the equipment requires a certain amount of time to start up, and the cold water cannot be heated to the required temperature instantly. Therefore, the outlet water temperature will first rise, then fall, and finally remain constant, resulting in fluctuating water temperature; 3. Fluctuations in water volume leading to fluctuating outlet water temperature.

[0049] Based on this, this application provides a valve device 100 applied in a gas water heater. As shown in the figure, the gas water heater 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 is improved, and the constant temperature performance is enhanced. The structure of this valve device 100 will be described below by way of an embodiment.

[0050] like Figures 1 to 3 As shown, the valve device 100 includes a valve body 1 and a valve core assembly 2.

[0051] 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 communicating with the valve cavity 101. 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 first inlet 121 is located on the peripheral wall surface 101a of the valve cavity 101. The valve core assembly 2 includes a rotating shaft rotatably disposed in the valve cavity 101. 23 and a first valve core 21 and a second valve core 22 fixedly mounted on the rotating shaft 23 and spaced apart from each other. The first valve core 21 rotates with the peripheral wall surface 101a of the valve cavity 101 to block or open the first water inlet 121, which is used to adjust the conduction area between the valve cavity 101 and the first water outlet channel 12. The second valve core 22 rotates in the valve cavity 101 to block or open the second water inlet 131, which is used to adjust the conduction area between the valve cavity 101 and the second water outlet channel 13.

[0052] In this embodiment, 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 through the first outlet channel 12 and / or the second outlet channel 13. Specifically, the first outlet channel 12 is connected to the valve cavity 101 through the first water inlet 121, and the second outlet channel 13 is connected to the valve cavity 101 through the second water inlet 131. The flow area of ​​the first water inlet 121 and the flow area of ​​the second water inlet 131 can be adjusted by the valve core assembly 2 provided in the valve cavity 101, so as to adjust the conduction area between the valve cavity 101 and the first outlet channel 12, and the conduction area between the valve cavity 101 and the second outlet channel 13, thereby adjusting the water output of the first outlet channel 12 and the second outlet channel 13. 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.

[0053] 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.

[0054] 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 2 As 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.

[0055] The valve core assembly 2 includes a rotating shaft 23 and a first valve core 21 and a second valve core 22 fixed on the rotating shaft 23. This allows the first valve core 21 and the second valve core 22 to rotate simultaneously within the valve cavity 101. The first valve core 21 cooperates with the first water inlet 121 to regulate the flow rate of the first water outlet 12, and the second valve core 22 cooperates with the second water inlet 131 to regulate the flow rate of the second water outlet 13. It is understood that this valve device 100 achieves the function of distributing the water flow rate 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 configured as a cylindrical cavity, with the rotation axis 23 aligned with the central axis of the valve cavity 101. 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.

[0056] By setting the first water inlet 121 on the peripheral wall surface 101a of the valve cavity 101, and the first valve core 21 rotatingly engaging with the peripheral wall surface 101a of the valve cavity 101, the water blocking direction at the first water inlet 121 is the radial direction of the valve cavity 101, and the corresponding water flow direction is also radial. Therefore, when the water flowing into the valve cavity 101 from the water inlet channel flows axially, it will not directly impact the valve core. Compared with the two valve cores being axially blocked, where the water flow easily impacts the valve core axially and causes eddies, this embodiment can avoid the generation of eddies, reduce water flow resistance, and ensure flow rate.

[0057] Optionally, the second water inlet 131 can be located on the peripheral wall surface 101a of the valve cavity 101. In this case, the outer peripheral surface of the second valve core 22 is rotatably engaged with the peripheral wall surface 101a of the valve cavity 101 to block or open the second water inlet 131. Alternatively, the second water inlet 131 can be located on the end wall surface of the valve cavity 101. In this case, the end face of the second valve core 22 is rotatably engaged with the end wall surface of the valve cavity 101 to block or open the second water inlet 131.

[0058] In practical applications, the shape and structure of the first water inlet 121 can be determined according to the actual situation, such as being circular, fan-shaped, square, strip-shaped, or other shapes. The shape and structure of the second water inlet 131 can also be determined according to the actual situation, such as being circular, fan-shaped, square, strip-shaped, or other shapes.

[0059] In practical applications, the valve device 100 also includes a flow sensor, which is located in the water inlet channel 11.

[0060] When this valve device 100 is applied to a water heater, the inlet channel 11 is connected to the inlet pipe 200, 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. For example... Figure 8 The following explanation uses the connection of the first water outlet channel 12 to the inlet of the heat exchanger 400 and the connection of the second water outlet channel 13 to the outlet pipe 300 as an example:

[0061] 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. The first valve core 21 rotates to block the first water inlet 121, reducing the conduction area between the valve chamber 101 and the first water outlet channel 12. The second valve core 22 rotates to open the second water inlet 131, increasing the conduction area between the valve chamber 101 and the second water outlet channel 13. This allows more cold water to flow out from the second water outlet and into the water outlet pipe 300, thereby reducing the overall water outlet temperature, solving the problem of temperature rise during water outages, and preventing users from being scalded by hot water.

[0062] 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 flow area of ​​the first water inlet 121 and increasing the flow area 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 flow area of ​​the first water inlet 121 and decreasing the flow area 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.

[0063] 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 flow area of ​​the second water inlet 131 and decreasing the amount of cold water mixed into the outlet pipe 300, thus 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 flow area of ​​the second water inlet 131 and increasing the amount of cold water mixed into the outlet pipe 300, thus 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.

[0064] 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 communicating with the valve cavity 101. The first outlet channel 12 communicates with the valve cavity 101 through a first water inlet 121, and the second outlet channel 13 communicates with the valve cavity 101 through a second water inlet 131. A valve core assembly 2 is provided inside the valve cavity 101. The valve core assembly 2 includes a rotating shaft 23 and a first valve core 21 and a second valve core 22 disposed on the rotating shaft 23. The two valve cores 22, by placing the first water inlet 121 on the peripheral wall surface 101a of the valve cavity 101, rotate with the peripheral wall surface 101a of the valve cavity 101 to block or open the first water inlet 121, adjusting the conduction area between the valve cavity 101 and the first water outlet channel 12. The second valve core 22 blocks or opens the second water inlet 131 to adjust the conduction area between the valve cavity 101 and the second water outlet channel 13, thereby realizing the water distribution function of the first water outlet channel 12 and the second water outlet channel 13. When the valve device 100 of this embodiment is applied to a gas water heater, it can adjust the water flow of the first water outlet channel 12 and the second water outlet channel 13 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, by placing the first water inlet 121 on the peripheral wall surface 101a of the valve cavity 101, this embodiment can reduce water flow resistance and ensure water flow rate.

[0065] In one embodiment of this application, when the conductive area between the valve cavity 101 and the first water outlet channel 12 increases, the conductive area between the valve cavity 101 and the second water outlet channel 13 decreases; when the conductive area between the valve cavity 101 and the first water outlet channel 12 decreases, the conductive area between the valve cavity 101 and the second water outlet channel 13 increases.

[0066] In this embodiment, the relationship between the conduction area of ​​valve cavity 101 and the first water outlet channel 12 and the conduction area of ​​valve cavity 101 and the second water outlet channel 13 can be linearly inversely correlated or nonlinearly inversely correlated. When the first water inlet 121 is blocked, the second water inlet 131 is fully open; when the second water inlet 131 is blocked, the first water inlet 121 is fully open.

[0067] With this configuration, the total flow rate entering the valve chamber 101 from the inlet channel 11 can be equal to the sum of the flow rates of the water flowing out from the two outlet channels.

[0068] In practical applications, the inverse correlation between the two conduction areas can be achieved by setting the positions of the first water inlet 121 and the second water inlet 131, as well as the positions of the first valve core 21 and the second valve core 22. For example, when the first water inlet 121 and the second water inlet 131 are both located on the peripheral wall 101a of the valve cavity 101, and the first water inlet 121 and the second water inlet 131 are located on the same side of the peripheral wall 101a of the valve cavity 101, the first valve core 21 and the second valve core 22 can be respectively located on both sides of the central axis of the valve cavity 101, so that when the valve core assembly 2 rotates, the blocking areas of the first valve core 21 and the second valve core 22 on the first water inlet 121 and the second water inlet 131 are inversely related; or, the first water inlet 121 and the second water inlet 131 are located on opposite sides of the peripheral wall 101a of the valve cavity 101, the first valve core 21 and the second valve core 22 can be respectively located on the same side of the central axis of the valve cavity 101, so that when the valve core assembly 2 rotates, the blocking areas of the first valve core 21 and the second valve core 22 on the first water inlet 121 and the second water inlet 131 are inversely related. For example, when the first water inlet 121 is located on the peripheral wall 101a of the valve cavity 101 and the second water inlet 131 is arranged along the axial direction of the valve cavity 101, the first water inlet 121 and the second water inlet 131 are located on the same side of the central axis of the valve cavity 101. In this case, the first valve core 21 and the second valve core 22 can be arranged on both sides of the central axis of the valve cavity 101, so that when the valve core assembly 2 rotates, the blocking areas of the first valve core 21 and the second valve core 22 on the first water inlet 121 and the second water inlet 131 are inversely related. Alternatively, when the first water inlet 121 and the second water inlet 131 are located on both sides of the central axis of the valve cavity 101, the first valve core 21 and the second valve core 22 can be arranged on the same side of the central axis of the valve cavity 101, so that when the valve core assembly 2 rotates, the blocking areas of the first valve core 21 and the second valve core 22 on the first water inlet 121 and the second water inlet 131 are inversely related.

[0069] As an example, such as Figure 2 The second water inlet 131 is located at one axial end of the valve cavity 101, and the second valve core 22 rotates within the valve cavity 101 to block or open the second water inlet 131.

[0070] In this embodiment, the first water inlet 121 is located on the peripheral wall surface 101a of the valve cavity 101. The outer peripheral surface of the first valve core 21 cooperates with the peripheral wall surface 101a of the valve cavity 101. When the first valve core 21 rotates, its outer peripheral surface can block or open the first water inlet 121, thereby adjusting the opening degree of the first water inlet 121. It is understood that the first water inlet 121 is a radial water passage, which can reduce the generation of eddies within the valve cavity 101 and lower resistance. The second water inlet 131 is located at one axial end of the valve cavity 101. The axial end face of the second valve core 22 can block or open the second water inlet 131, thereby adjusting the opening degree of the second water inlet 131. It is understood that the second valve core 22 can be positioned upstream of the second water inlet 131, allowing water pressure to increase the sealing force of the second valve core 22 on the second water inlet 131.

[0071] In one embodiment of this application, as Figures 2 to 5 The first valve core 21 is a stop block 211. The outer peripheral surface of the stop block 211 rotates and engages with the peripheral wall surface 101a of the valve cavity 101 to block or open the first water inlet 121. The outer peripheral surface of the stop block 211 is an arc surface or a spherical surface.

[0072] Understandably, the first valve core 21 can be an arc-shaped block, a spherical block, a butterfly-shaped block, or some other shape or structure.

[0073] 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 peripheral wall surface 101a of the valve cavity 101, ensuring better sealing force and reducing resistance. Optionally, the radial cross-section of the first valve core 21 is fan-shaped.

[0074] Furthermore, the central angle A1 corresponding to the outer circumference of the first valve core 21 satisfies: 80°≤A1≤180°. It is understandable that the central angle corresponding to the outer circumference of the first valve core 21 should not be too small or too large. If it is too small, it may not completely block the first water inlet 121, affecting the regulation of the water flow rate in the first water outlet channel 12; if it is too large, it may cause the first valve core 21 to rotate a relatively long angle before opening the first water inlet 121, affecting the regulation efficiency of the first water inlet 121. Based on this, in this embodiment, the central angle A1 corresponding to the outer circumference of the first valve core 21 is set to 80°≤A1≤180°. On the one hand, this ensures that the first valve core 21 can completely block the first water inlet 121; on the other hand, it ensures the regulation efficiency of the first water inlet 121 and prevents the situation where the first valve core 21 rotates for too long without being able to open the first water inlet 121. In practical applications, in order to ensure better adjustment effect, the central angle A1 corresponding to the outer peripheral surface of the first valve core 21 can be 120°≤A1≤165°, preferably, the central angle A1 is 160°.

[0075] Furthermore, in this embodiment, the first valve core 21 has a smaller mating area with the peripheral wall 101a of the valve cavity 101 compared to the cylindrical structure, which can reduce the motion resistance.

[0076] In one embodiment of this application, as Figures 2 to 6 A baffle plate 14 is provided inside the valve body 1, located at one axial end of the valve cavity 101 to separate the second water outlet channel 13 from the valve cavity 101. The periphery of the baffle plate 14 is connected to the peripheral wall surface 101a of the valve cavity 101. The second water inlet 131 is formed by an opening in the baffle plate 14, or the baffle plate 14 has a notch, which surrounds the peripheral wall surface 101a of the valve cavity 101 to form the second water inlet 131. The axial end face of the second valve core 22 is rotatably engaged with the baffle plate 14. 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 14, 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 14, so as to ensure the sealing effect of the second valve core 22 on the second water inlet 131.

[0077] A baffle plate 14 is provided inside the valve cavity 101. The baffle plate 14 separates the second water outlet channel 13 from the valve cavity 101. The second water inlet 131 is located on the baffle plate 14 or between the baffle plate 14 and the peripheral wall surface 101a of the valve cavity 101. It can be understood that the second water inlet 131 axially penetrates the baffle plate 14.

[0078] Optionally, when the periphery of the baffle plate 14 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 14. 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.

[0079] Optionally, the side of the baffle plate 14 is provided with a notch, which is used to form a second water inlet 131 by surrounding the peripheral wall surface 101a of the valve cavity 101. This design makes it easier to mold and manufacture.

[0080] Furthermore, to facilitate manufacturing, the baffle plate 14 and the valve body 1 are integrally formed, improving assembly efficiency. Optionally, the baffle plate 14 and the valve body 1 can be integrally formed by 3D printing or by molding.

[0081] 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, and 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 substantially tangent to the peripheral wall surface 101a of the valve cavity 101. "Substantially tangent" here means that the outer peripheral surface of the second valve core 22 is in contact or substantially in contact with the peripheral wall surface 101a of the valve cavity 101, so that there is no flow gap or only 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 improving the sealing effect of the second valve core 22 on the second water inlet 131. Furthermore, the central angle of the second valve core 22 is larger than the central angle of the second water inlet 131. This configuration allows the second valve core 22 to completely seal the second water inlet 131 during rotation.

[0082] Understandably, the central angle of the second valve core 22 should not be too small or too large. If it is too small, it may not completely block the second water inlet 131; if it is too large, the second valve core 22 may need to rotate a long angle before it can open the second water inlet 131, affecting the adjustment efficiency of the second water inlet 131, and may also result in both the first water inlet 121 and the second water inlet 131 being blocked. Based on this, in this embodiment, the central angle A2 of the second valve core 22 is set to satisfy 180°≤A2≤280°. On the one hand, this ensures that the second valve core 22 can completely block the second water inlet 131, and on the other hand, it ensures the adjustment efficiency of the second water inlet 131, preventing the situation where both the first water inlet 121 and the second water inlet 131 are blocked. In practical applications, to ensure better adjustment effect, the central angle of the second valve core 22 can be 180°≤A2≤240°.

[0083] Furthermore, such as Figures 2 to 6The second valve core 22 is a baffle plate, and the axial end face of the baffle plate is rotatably engaged with the axial end face of the baffle plate 14. The second valve core 22 has 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.

[0084] Specifically, the baffle plate 14 is provided with a mounting hole 141, and the axial end face of the second valve core 22 is provided with a protruding shaft 221, which is rotatably installed in the mounting hole 141. It can be understood that the central axis of the protruding shaft 221 is aligned with the central axis of the valve cavity 101. During assembly, the mounting hole 141 and the protruding shaft 221 serve to position and install the valve core assembly 2.

[0085] Furthermore, such as Figures 4 to 5 The first valve core 21 and the second valve core 22 are located on the radial sides of the rotating shaft 23, respectively. This arrangement makes the rotational movement of the entire valve core assembly 2 more stable, preventing the situation where the two valve cores are located on the same side of the rotating shaft 23 and are prone to skew. On the other hand, it can smoothly achieve the inverse correlation between the flow area of ​​the first water inlet 121 and the flow area of ​​the second water inlet 131.

[0086] In one embodiment of this application, as Figure 2 , Figure 3 as well as Figure 7 The valve body 1 is also provided with an installation port 15 communicating with the valve cavity 101; the valve device 100 also includes a fixed sleeve 4 and a drive assembly 3 installed on the fixed sleeve 4. The fixed sleeve 4 is sealed and installed on the installation port 15. The fixed sleeve 4 is provided with an assembly hole 41; the rotating shaft 23 is sealed and fitted to the assembly hole 41 and extends out of the assembly hole 41 to drive and connect with the drive assembly 3.

[0087] Specifically, the fixing sleeve 4 and the mounting port 15 can be sealed together using a sealing ring. The rotating shaft 23 of the valve core assembly 2 passes through the mounting hole 41 from inside the valve cavity 101 and extends to the outside of the fixing sleeve 4. The rotating shaft 23 and the mounting hole 41 can also be sealed together using a sealing ring. 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. Optionally, the drive assembly 3 and the fixing sleeve 4 can be fixed together using screws.

[0088] Furthermore, such as Figure 7 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.

[0089] 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.

[0090] This utility model also proposes a gas water heater, such as Figure 2 and Figure 8 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.

[0091] 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:

[0092] 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. The first valve core 21 rotates to block the first water inlet 121, reducing the conduction area between the valve chamber 101 and the first water outlet channel 12. The second valve core 22 rotates to open the second water inlet 131, increasing the conduction area between the valve chamber 101 and the second water outlet channel 13. This allows more cold water to flow out from the second water outlet and into the water outlet pipe 300, thereby reducing the overall water outlet temperature, solving the problem of temperature rise during water outages, and preventing users from being scalded by hot water.

[0093] 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 flow area of ​​the first water inlet 121 and increasing the flow area 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 flow area of ​​the first water inlet 121 and decreasing the flow area 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.

[0094] 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 flow area of ​​the second water inlet 131 and decreasing the amount of cold water mixed into the outlet pipe 300, thus 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 flow area of ​​the second water inlet 131 and increasing the amount of cold water mixed into the outlet pipe 300, thus 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.

[0095] 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.

[0096] 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 by include: The valve body includes 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 communicating with the valve cavity, and the second outlet channel has a second water inlet communicating with the valve cavity. The first water inlet is located on the peripheral wall of the valve cavity. The valve core assembly includes a rotating shaft rotatably disposed in the valve cavity and a first valve core and a second valve core fixedly disposed on the rotating shaft and spaced apart from each other. The first valve core rotates with the peripheral wall of the valve cavity to block or open the first water inlet, thereby adjusting the conduction area between the valve cavity and the first water outlet channel. The second valve core rotates within the valve cavity to block or open the second water inlet, thereby adjusting the conduction area between the valve cavity and the second water outlet channel.

2. The valve device of claim 1, wherein When the conductive area between the valve cavity and the first water outlet channel increases, the conductive area between the valve cavity and the second water outlet channel decreases. When the conductive area between the valve cavity and the first water outlet channel decreases, the conductive area between the valve cavity and the second water outlet channel increases.

3. The valve device of claim 2, wherein The first valve core is a stop block, and the outer peripheral surface of the stop block rotates with the peripheral wall surface of the valve cavity to block or open the first water inlet; The outer circumferential surface of the stop block is a circular arc surface or a spherical surface.

4. The valve device of claim 3, wherein The outer circumferential surface of the stop block is an arc surface, and the central angle A1 corresponding to the outer circumferential surface of the stop block satisfies: 80°≤A1≤180°.

5. The valve device of claim 4, wherein The radial cross-section of the stop block is fan-shaped.

6. Valve device according to any of claims 1 to 5, characterized in that The second water inlet is located at one axial end of the valve cavity, and the second valve core rotates within the valve cavity to block or open the second water inlet.

7. The valve device of claim 6, wherein The valve body is provided with a baffle plate, which is located at one axial end of the valve cavity to separate the second water outlet channel from the valve cavity; The periphery of the baffle plate is connected to the peripheral wall of the valve cavity, and the second water inlet is formed by an opening in the baffle plate; or, the baffle plate has a notch to enclose the second water inlet with the peripheral wall of the valve cavity. The axial end face of the second valve core rotates with the baffle plate to block or open the second water inlet.

8. The valve apparatus of claim 7, wherein The second water inlet is a fan-shaped hole with the central axis of the valve cavity as its center; The radial cross-section of the second valve core is fan-shaped; the central angle of the second valve core is greater than the central angle of the second water inlet.

9. The valve apparatus of claim 8, wherein The central angle A2 of the second valve core satisfies 180°≤A2≤280°.

10. The valve apparatus of claim 8, wherein The first valve core and the second valve core are located on the radial sides of the rotating shaft, respectively.

11. The valve apparatus of claim 7 wherein, The second valve core is a blocking disc ， The axial end face of the blocking disc is rotationally coupled with the axial end face of the shielding plate. The second valve core is provided with a flow port. When the second valve core rotates, it can drive the flow port to move relative to the second water inlet, so as to adjust the overlap area between the flow port and the second water inlet.

12. The valve apparatus of claim 7, wherein The shield plate is provided with a mounting hole, and the axial end face of the second valve core is provided with a protruding shaft, which is rotatably fitted into the mounting hole.

13. The valve apparatus of claim 7, wherein The baffle plate and the valve body are integrally formed.

14. The valve device according to any one of claims 1 to 5, wherein The valve body is also provided with an installation port that communicates with the valve cavity; The valve device further includes a fixing sleeve and a drive assembly installed on the fixing sleeve. The fixing sleeve is sealed and installed at the mounting port, and the fixing sleeve is provided with an assembly hole. The rotating shaft is sealingly fitted in the assembly hole and extends out of the assembly hole to be drivingly connected with the driving assembly.

15. The valve apparatus of claim 14, wherein The assembly hole is provided with a first limiting part, and the rotating shaft is provided with a second limiting part; the second limiting part is used for limiting cooperation with the first limiting part to limit the rotating angle of the rotating shaft.

16. The valve device of any one of claims 1 to 5, wherein The valve device further comprises a flow sensor, which is arranged in the water inlet flow channel.

17. A gas water heater, characterised by The valve device is arranged in a water heating device, which comprises a water inlet pipe, a water outlet pipe, a heat exchanger and the valve device, the water inlet flow channel is in communication with the water inlet pipe, one of the first water outlet flow channel and the second water outlet flow channel is in communication with the water inlet end of the heat exchanger, and the other is in communication with the water outlet pipe.

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