By-pass valve and water heater comprising same

Abstract

The application provides a bypass valve and a water heater comprising the same, and belongs to the technical field of water heaters. The bypass valve comprises a valve body, a water inlet channel, a water outlet channel, a first channel, a second channel and a communication channel are arranged in the valve body; the bypass valve further comprises a first valve core and a second valve core, the first valve core is configured to move between a first position and a second position along the extension direction of the first channel; when the first valve core moves from the first position to the second position, the second valve core moves along with the first valve core, and at least part of the second valve core moves from the first channel to the second channel through the communication channel to reduce the opening degree of the second channel; when the first valve core moves from the second position to the first position, the second valve core moves along with the first valve core, and at least part of the second valve core moves from the second channel to the first channel through the communication channel to increase the opening degree of the second channel. The movement of the first valve core drives the movement of the second valve core to change the opening degree of the second channel, thereby realizing the adjustment of the bypass flow.

Description

Technical Field

[0001] This invention relates to the field of water heater technology, and particularly to a bypass valve and a water heater containing the same. Background Technology

[0002] A water heater is a common appliance used to heat water. Cold water flows into the heat exchanger of the water heater from the inlet pipe. After the water exchanges heat with the heat exchanger and its temperature rises, it flows out through the outlet pipe for the user's use.

[0003] When a user closes the valve to stop using hot water, the water in the heat exchanger stops flowing. Because the heat exchanger has thermal inertia, the heat stored in the heat exchanger continues to be conducted to the water inside after the water is turned off, causing this portion of the water to become too hot, resulting in a temperature rise during the water outage. When the user reopens the valve, they may experience a period of hot water, causing discomfort.

[0004] To address the issue of temperature rise during water outages, current technical solutions involve connecting a bypass pipe between the inlet and outlet pipes inside the water heater. This allows some cold water to bypass the heat exchanger and flow directly through the bypass pipe to the water heater's outlet pipe, neutralizing the temperature rise caused by the outage. However, conventional bypass pipes are fixed flow channels with no adjustable flow rate. If the channel is too narrow, the flow rate is too low to effectively reduce the temperature rise during outages; if the channel is too wide, the flow rate is too high, potentially causing excessive cooling of the hot water. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the defect that the bypass flow of water heaters in the prior art cannot be adjusted, and to provide a bypass valve and a water heater containing the same.

[0006] The present invention solves the above-mentioned technical problems through the following technical solution:

[0007] A bypass valve includes a valve body with an inlet channel, an outlet channel, and a bypass channel connected to the inlet channel and the outlet channel. The bypass channel includes a first channel, a second channel, and a connecting channel. The first channel and the second channel are both connected to the inlet channel and the outlet channel, and are connected to each other via the connecting channel. The bypass valve also includes a first valve core and a second valve core, both disposed within the first channel and connected to each other. The first valve core is configured to move between a first position and a second position along the extension direction of the first channel. When the first valve core moves from the first position to the second position, the second valve core moves with the first valve core, and at least a portion of the second valve core moves from the first channel to the second channel via the connecting channel, thereby reducing the opening of the second channel. When the first valve core moves from the second position to the first position, the second valve core moves with the first valve core, and at least a portion of the second valve core moves from the second channel to the first channel via the connecting channel, thereby increasing the opening of the second channel.

[0008] In this scheme, the bypass channel includes two channels, a first channel and a second channel, and a first valve core and a second valve core are installed in the first channel and the second channel respectively. The movement of the first valve core drives the movement of the second valve core, thereby changing the opening degree of the second channel to regulate the bypass flow: when the opening degree of the second channel is larger, the total bypass flow is larger, which helps to reduce the temperature rise during water outage as quickly as possible; when the opening degree of the second channel is smaller, the total bypass flow is smaller, which prevents too much cold water from flowing out directly without heating, thus affecting the outlet water temperature.

[0009] Preferably, the bypass valve further includes a transmission component disposed within the first channel and connected between the first valve core and the second valve core.

[0010] In this solution, the movement of the first valve core is driven by a transmission component, which in turn drives the movement of the second valve core. The overall structure is modular, making it easy to maintain and replace.

[0011] Preferably, the transmission component includes a transmission gear, a first rack, and a second rack. The first rack is disposed on the first valve core, and the second rack is disposed on the second valve core. Both the first rack and the second rack mesh with the transmission gear.

[0012] In this design, the meshing structure of the rack and gear is simple. A first rack is provided on the first valve core. When the first valve core moves along the extension direction of the first channel, the first rack drives the transmission gear to rotate. The rotation of the transmission gear will then drive the second rack that meshes with it to move, so that the second valve core moves with the first valve core.

[0013] Preferably, the transmission gear is a compound gear, which includes a first gear and a second gear coaxially connected, wherein the diameter of the first gear is larger than the diameter of the second gear; the first rack meshes with the first gear, and the second rack meshes with the second gear.

[0014] In this design, the first rack meshes with the larger diameter first gear in the compound gear system, and the second rack meshes with the smaller diameter second gear. The compound gear system achieves a deceleration effect, slowing down the movement speed of the second valve core. Therefore, when the user restarts the water supply after a water outage, although the first valve core begins to move to drive the second valve core to reduce the opening of the second channel, the second valve core does not move synchronously with the first valve core due to the deceleration effect of the compound gear. In other words, the speed at which the second channel opening decreases is less than the speed at which the first valve core moves, allowing the second channel to remain open for a longer period. This ensures sufficient bypass flow can be used to neutralize the temperature rise during the water outage. As the second valve core continues to move, the opening of the second channel gradually decreases, reducing the total bypass flow and preventing excessive neutralization of the water outage temperature, which would result in too much cold water flowing out unheated and affecting the outlet water temperature.

[0015] Preferably, the first valve core includes a support plate and a side plate, the support plate is connected to the side plate, and the first rack is disposed on the side plate; the support plate can move away from the water inlet channel under the action of water flow, so that the first valve core moves from the first position to the second position.

[0016] In this design, cold water flows into the water inlet channel. Under the action of the water flow, the support plate moves away from the water inlet channel, thereby driving the side plate and the first rack set on the side plate to move, which in turn drives the transmission gear to rotate.

[0017] Preferably, the second valve core is disposed on the side of the side plate away from the support plate, the first rack is disposed on the side of the side plate away from the inner wall surface of the first channel and extends along the extension direction of the first channel, and the second rack is disposed on the side of the second valve core facing the side plate and extends along the extension direction perpendicular to the first channel.

[0018] In this design, the second valve core is located on the side of the side plate away from the support plate, i.e., downstream of the first valve core along the water flow direction. Thus, the first valve core (or support plate) located upstream is first propelled by the water flow and moves, then drives the second valve core to move via a transmission gear. The first rack extends along the extension direction of the first channel, and the second rack extends perpendicular to the extension direction of the first channel, ensuring that the movement paths of the first and second racks do not interfere with each other.

[0019] Preferably, the bypass valve further includes a fixing part, which includes a support part and a support shaft; the support part is fixedly connected to the valve body, one end of the support shaft is fixedly connected to the support part, and the transmission gear is fixedly connected to the support shaft.

[0020] In this solution, the above-mentioned structural form is adopted, and the transmission gear is fixed on the support shaft to prevent the transmission gear from being displaced during the movement of the first valve core.

[0021] Preferably, the support shaft passes through the tray.

[0022] In this solution, the above-mentioned structural form is adopted. The support shaft can restrict the movement direction of the pallet. Under the action of water flow, the pallet can move within the first channel with the support shaft as the axis of movement, so as to avoid being overturned by the water flow.

[0023] Preferably, the bypass valve further includes a reset mechanism connected to the support plate, the reset mechanism being used to drive the first valve core to move from the second position to the first position.

[0024] In this scheme, the reset mechanism drives the first valve core to move from the second position to the first position, so that the second valve core moves with the first valve core, increasing the opening of the second channel.

[0025] Preferably, the reset mechanism is a spring, and the outer peripheral surface of the support shaft is provided with a convex ring, with the spring abutting between the convex ring and the support plate.

[0026] In this solution, the above-mentioned structure is adopted. When the first valve core moves from the first position to the second position, the support plate moves away from the water inlet channel under the action of water flow, and the spring is compressed between the convex ring and the support plate. When the water flow stops, the spring releases its elastic force and pushes the support plate to move closer to the water inlet channel, so that the first valve core moves from the second position to the first position, thereby driving the first rack to move in the opposite direction, the transmission gear to rotate in the opposite direction, and the second rack to move in the opposite direction, so that at least part of the second valve core moves from the second channel to the first channel through the connecting channel, thereby increasing the opening of the second channel.

[0027] Preferably, the reset mechanism is a conical spring, with the small end of the conical spring abutting against the convex ring and the large end of the conical spring abutting against the support plate.

[0028] In this design, the small end of the conical spring is the end with the smaller diameter of the spring coil, and the large end of the conical spring is the end with the larger diameter of the spring coil. Due to its structural feature of being small at one end and large at the other, the conical spring has a much smaller height after compression compared to a regular cylindrical spring. Using a conical spring can reduce the space occupied and make the bypass valve structure more compact.

[0029] Preferably, the support shaft includes a hollow mounting cavity, the transmission gear is fixedly connected to the mounting cavity, and the second rack passes through the mounting cavity.

[0030] In this design, since the second rack meshes with the transmission gear, the transmission gear is fixedly connected to the mounting cavity of the support shaft. The second rack will also pass through the mounting cavity, which limits the second rack and prevents it from disengaging from the transmission gear.

[0031] Preferably, the second valve core includes a head connected to one end of the second rack facing the communication channel, and at least a portion of the head is slidably disposed in the communication channel.

[0032] In this scheme, the above-mentioned structural form is adopted, and the second rack can drive the head to move. The head moves from the connecting channel to the second channel or from the second channel to the connecting channel, thereby changing the opening of the second channel.

[0033] Preferably, the length of the head along the extension direction of the connecting channel is greater than the inner diameter of the second channel.

[0034] In this solution, the above-mentioned structure is adopted. When the head moves from the connecting channel into the second channel and abuts against the inner wall of the second channel on the side opposite to the connecting channel, the head can completely close the second channel because the length of the head along the extension direction of the connecting channel is greater than the inner diameter of the second channel, so as to better reduce the total bypass flow.

[0035] A water heater, including a bypass valve as described above.

[0036] The positive and progressive effects of this invention are as follows:

[0037] In this invention, the bypass channel includes two channels: a first channel and a second channel. A first valve core and a second valve core are installed in the first channel and the second channel, respectively. The movement of the first valve core drives the movement of the second valve core, thereby changing the opening degree of the second channel to regulate the bypass flow rate. When the opening degree of the second channel is large, the total bypass flow rate is large, which helps to reduce the water outage temperature rise as soon as possible. When the opening degree of the second channel is small, the total bypass flow rate is small, which avoids too much cold water flowing out directly without heating, thus affecting the outlet water temperature. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of a water heater according to a preferred embodiment of the present invention.

[0039] Figure 2 This is a three-dimensional structural diagram of the bypass valve according to a preferred embodiment of the present invention.

[0040] Figure 3This is a cross-sectional structural diagram of a bypass valve according to a preferred embodiment of the present invention, wherein the first valve core is located in the first position.

[0041] Figure 4 This is a cross-sectional structural diagram of a bypass valve according to a preferred embodiment of the present invention, wherein the first valve core is located in the second position.

[0042] Figure 5 This is a three-dimensional structural diagram of the first valve core and the second valve core of the bypass valve according to a preferred embodiment of the present invention.

[0043] Explanation of reference numerals in the attached figures:

[0044] Water heater 100

[0045] Water inlet pipe 110

[0046] Water outlet pipe 120

[0047] Heat exchanger 130

[0048] Bypass valve 200

[0049] Valve body 210

[0050] Support platform 211

[0051] Water outlet channel 220

[0052] Water inlet channel 230

[0053] First Channel 240

[0054] Second Channel 250

[0055] Connecting Channel 260

[0056] First valve core 300

[0057] First rack 310

[0058] pallet 320

[0059] Slider 330

[0060] 340 clearance slot

[0061] Side panel 350

[0062] Second valve core 400

[0063] Second rack 410

[0064] Head 420

[0065] Composite Gear 500

[0066] First gear 510

[0067] Second gear 520

[0068] Conical spring 600

[0069] Support section 700

[0070] Support shaft 800

[0071] Raised ring 810

[0072] Mounting cavity 820 Detailed Implementation

[0073] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments.

[0074] like Figure 1 As shown, this embodiment discloses a water heater 100, which includes an inlet pipe 110, an outlet pipe 120, a heat exchanger 130, and a bypass valve 200. Both the inlet pipe 110 and the outlet pipe 120 are connected to the heat exchanger 130. Cold water enters the heat exchanger 130 from the inlet pipe 110, is heated, and then flows out from the outlet pipe 120 for user use. The bypass valve 200 is connected between the inlet pipe 110, the outlet pipe 120, and the heat exchanger 130. It is used to allow a portion of the cold water in the inlet pipe 110 to bypass the heat exchanger 130 and flow directly through the bypass valve 200 to the outlet pipe 120, using this portion of cold water to neutralize the hot water section in the outlet pipe 120 caused by a water outage.

[0075] like Figures 2-5 As shown, the bypass valve 200 includes a valve body 210, within which are provided an inlet channel 230, an outlet channel 220, and a bypass channel. The inlet channel 230 is connected to the inlet pipe 110 and the inlet end of the heat exchanger 130, respectively. The outlet channel 220 is connected to the outlet pipe 120 and the outlet end of the heat exchanger 130, respectively. The bypass channel connects the inlet channel 230 and the outlet channel 220. Specifically, in this embodiment, the bypass channel includes a first channel 240, a second channel 250, and a connecting channel 260. Both the first channel 240 and the second channel 250 are connected to the inlet channel 230 and the outlet channel 220, and the first channel 240 and the second channel 250 are connected via the connecting channel 260.

[0076] The bypass valve 200 also includes a first valve core 300 and a second valve core 400, both of which are disposed within a first channel 240 and connected to each other. The first valve core 300 is configured to move between a first position and a second position along the extension direction of the first channel 240. When the first valve core 300 moves from the first position to the second position, the second valve core 400 moves with the first valve core 300, and at least a portion of the second valve core 400 moves from the first channel 240 to the second channel 250 through the connecting channel 260 to reduce the opening of the second channel 250. When the first valve core 300 moves from the second position to the first position, the second valve core 400 moves with the first valve core 300, and at least a portion of the second valve core 400 moves from the second channel 250 to the first channel 240 through the connecting channel 260 to increase the opening of the second channel 250.

[0077] Therefore, the bypass channel includes two channels, a first channel 240 and a second channel 250, and a first valve core 300 and a second valve core 400 are installed in the first channel 240 and the second channel 250. The movement of the first valve core 300 drives the movement of the second valve core 400, thereby changing the opening of the second channel 250 to regulate the bypass flow: when the opening of the second channel 250 is larger, the total bypass flow is larger, which helps to reduce the temperature rise during water outages as quickly as possible; when the opening of the second channel 250 is smaller, the total bypass flow is smaller, preventing too much cold water from flowing out directly without heating, which would affect the outlet water temperature.

[0078] Specifically, in this embodiment, the first valve core 300 has a cylindrical structure and fits against the inner wall of the first channel 240. The bottom of the first valve core 300 is a support plate 320, and a side plate 350 is connected around the support plate 320. The support plate 320 is located on the side of the first channel 240 near the water inlet channel 230. On the side of the first channel 240 near the water inlet channel 230, the valve body 210 has a support platform 211 extending into the first channel 240, thereby confining the support plate 320 within the first channel 240. When the support plate 320 abuts against the support platform 211, the first valve core 300 is in a first position.

[0079] A slider 330 is provided on the side of the side plate 350 that contacts the inner wall of the first channel 240. The slider 330 extends in the same direction as the first channel 240. A corresponding groove is provided in the valve body 210. By placing the slider 330 in the groove, the first valve core 300 can move along the extension direction of the first channel 240.

[0080] Furthermore, through holes are provided on both the support platform 211 and the tray 320, allowing cold water in the water inlet channel 230 to enter the first channel 240. As a result, the tray 320 can move away from the water inlet channel 230 under the action of the water flow. In addition, the slider 330 provided on the side plate 350 cooperates to enable the first valve core 300 to move from the first position along the extension direction of the first channel 240.

[0081] The bypass valve 200 also includes a transmission component, which is disposed within the first channel 240 and connected between the first valve core 300 and the second valve core 400. The transmission component causes the movement of the first valve core 300 to drive the movement of the second valve core 400. The transmission component includes a transmission gear, a first rack 310, and a second rack 410. The first rack 310 is disposed on the first valve core 300, and the second rack 410 is disposed on the second valve core 400. Both the first rack 310 and the second rack 410 mesh with the transmission gear.

[0082] The first rack 310 is disposed on the side plate 350. Specifically, it is disposed on the side of the side plate 350 away from the inner wall surface of the first channel 240 and extends along the extension direction of the first channel 240. The second valve core 400 is disposed on the side of the side plate 350 away from the support plate 320. The second rack 410 is disposed on the side of the second valve core 400 facing the side plate 350 and extends along the extension direction perpendicular to the first channel 240.

[0083] Since the second valve core 400 is located on the side of the side plate 350 away from the support plate 320, that is, along the direction of cold water flow, the second valve core 400 is located downstream of the first valve core 300. Therefore, when the support plate 320 located upstream is first pushed by the water flow and moves, it will drive the side plate 350 and the first rack 310 set on the side plate 350 to move away from the water inlet channel 230. The movement of the first rack 310 drives the transmission gear meshing with it to rotate, and then the rotation of the transmission gear drives the second rack 410 meshing with it to move, so that the second valve core 400 moves with the first valve core 300.

[0084] The first rack 310 extends along the extension direction of the first channel 240, and the second rack 410 extends along the extension direction perpendicular to the first channel 240, so that the movement paths of the first rack 310 and the second rack 410 do not interfere with each other. To avoid contact and interference between the side plate 350 and the second rack 410 during the movement of the first rack 310, a clearance groove 340 is formed in the part of the side plate 350 directly opposite the second rack 410. When the first valve core 300 moves, the second rack 410 can be located in the clearance groove 340 and will not directly contact the side plate 350.

[0085] In addition, the bypass valve 200 also includes a fixing part, which includes a support part 700 and a support shaft 800. The support part 700 is fixedly connected to the valve body 210 and is located on the side of the first channel 240 near the outlet channel 220. Of course, to allow water flow, the support part 700 is also provided with a through hole. The support shaft 800 extends along the extension direction of the first channel 240. One end of the support shaft 800 is fixedly connected to the support part 700, and the other end of the support shaft 800 passes through the support plate 320. The support shaft 800 can restrict the movement direction of the support plate 320. Under the action of water flow, the support plate 320 can move within the first channel 240 with the support shaft 800 as the axis of movement, preventing it from being overturned by the water flow. The transmission gear is fixedly connected to the support shaft 800 to prevent the transmission gear from being displaced during the movement of the first valve core 300.

[0086] Specifically, the support shaft 800 includes a hollow mounting cavity 820, a transmission gear is fixedly connected within the mounting cavity 820, and a second rack 410 passes through the mounting cavity 820. Since the second rack 410 meshes with the transmission gear, fixing the transmission gear within the mounting cavity 820 of the support shaft 800, the second rack 410 also passes through the mounting cavity 820, which limits the second rack 410 and prevents it from disengaging from the transmission gear. In this embodiment, the transmission gear and the support shaft 800 are fixedly connected by a pin; in other optional embodiments, the transmission gear and the support shaft 800 are also fixedly connected by bolts or other means.

[0087] Furthermore, in this embodiment, the transmission gear is a compound gear 500, which includes a first gear 510 and a second gear 520 coaxially connected. The diameter of the first gear 510 is larger than the diameter of the second gear 520. The first rack 310 meshes with the first gear 510, and the second rack 410 meshes with the second gear 520.

[0088] The first rack 310 meshes with the larger diameter first gear 510 in the compound gear 500, and the second rack 410 meshes with the smaller diameter second gear 520 in the compound gear 500. The compound gear 500 achieves a deceleration effect, slowing down the movement speed of the second valve core 400. Therefore, when the user restarts the water supply after a water outage, although the first valve core 300 begins to move to drive the second valve core 400 to reduce the opening of the second channel 250, due to the deceleration effect of the compound gear 500, the second valve core 400 does not move synchronously with the first valve core 300. That is, the speed at which the opening of the second channel 250 decreases is less than the movement speed of the first valve core 300. The second channel 250 can remain open for a longer period, allowing sufficient bypass flow to neutralize the temperature rise during the water outage. As the second valve core 400 continues to move, the opening of the second channel 250 gradually decreases, reducing the total bypass flow and preventing excessive neutralization of the water outage temperature, which could lead to too much cold water flowing out without heating and affecting the outlet water temperature.

[0089] In other alternative embodiments, the transmission element may be any other means capable of transmitting the movement of the first valve core 300 to the second valve core 400 to drive its movement.

[0090] Furthermore, the second valve core 400 also includes a head 420, which is connected to one end of the second rack 410 facing the communication channel 260, and at least a portion of the head 420 is slidably disposed in the communication channel 260.

[0091] Therefore, the movement of the second rack 410 can drive the head 420 to move, so that the head 420 moves from the connecting channel 260 to the second channel 250, or from the second channel 250 to the connecting channel 260, thereby changing the opening of the second channel 250.

[0092] In this embodiment, the length of the head 420 along the extension direction of the connecting channel 260 is greater than the inner diameter of the second channel 250. When the head 420 moves from the connecting channel 260 into the second channel 250 and abuts against the inner wall of the second channel 250 on the side opposite to the connecting channel 260, since the length of the head 420 along the extension direction of the connecting channel 260 is greater than the inner diameter of the second channel 250, the head 420 can completely close the second channel 250 to better reduce the total bypass flow.

[0093] Specifically, when the head 420 abuts against the inner wall of the side opposite to the connecting channel 260 of the second channel 250, the second valve core 400 cannot move further, the transmission gear cannot rotate, and the support plate 320 cannot move further. At this time, the first valve core 300 moves to the second position.

[0094] Furthermore, the bypass valve 200 also includes a reset mechanism connected to the support plate 320. The reset mechanism is used to drive the first valve core 300 to move from the second position to the first position, so that the second valve core 400 moves with the first valve core 300, increasing the opening of the second channel 250. Specifically, in this embodiment, the reset mechanism is a spring, and a convex ring 810 is provided on the outer peripheral surface of the support shaft 800. The spring abuts between the convex ring 810 and the support plate 320.

[0095] When the first valve core 300 moves from the first position to the second position, the support plate 320 moves away from the water inlet channel 230 under the action of water flow, and the spring is compressed between the convex ring 810 and the support plate 320. When the user turns off the water, the water flow stops, the support plate 320 is no longer pushed by the water flow, and the compressed spring releases its elasticity, pushing the support plate 320 to move closer to the water inlet channel 230, so that the first valve core 300 moves from the second position to the first position, thereby driving the first rack 310 to move in the opposite direction, driving the transmission gear to rotate in the opposite direction, driving the second rack 410 to move in the opposite direction, so that the head 420 of the second valve core 400 moves from the second channel 250 through the connecting channel 260 into the first channel 240, thereby increasing the opening of the second channel 250.

[0096] Specifically, in this embodiment, the spring is a conical spring 600. The small end of the conical spring 600 abuts against the convex ring 810, and the large end of the conical spring 600 abuts against the support plate 320. The small end of the conical spring 600 is the end with a smaller diameter spring coil, and the large end of the conical spring 600 is the end with a larger diameter spring coil. Due to its structural feature of being smaller at one end and larger at the other, the conical spring 600 has a much smaller height after compression compared to a common cylindrical spring. Using a conical spring 600 can reduce the space occupied, making the bypass valve 200 more compact. Of course, in other optional embodiments, provided that the installation space allows, the reset mechanism can also be a common cylindrical spring, or other devices capable of resetting the first valve core 300.

[0097] In practical use, the overall operation of the bypass valve 200 in this embodiment is as follows:

[0098] When the user restarts the water supply after a water outage, cold water flows from the inlet pipe 110 into the inlet channel 230 of the bypass valve 200. Part of the cold water flows from the second channel 250 to the outlet channel 220, while another part enters the first channel 240 through the through hole on the support platform 211 and flows to the outlet channel 220. Driven by the water flow, the support plate 320 moves away from the inlet channel 230 from its first position, causing the first rack 310 to also move away from the inlet channel 230. At this time, the first gear 510 rotates simultaneously, while the second gear 520, coaxial with the first gear 510, rotates at a speed less than the first gear 510. This causes the second rack 410 on the second valve core 400 to move at a slower speed, thereby moving the head 420 of the second valve core 400 from the connecting channel 260 into the second channel 250, reducing the opening of the second channel 250. Simultaneously, the conical spring 600 is compressed. When the head 420 abuts against the inner wall of the side opposite to the connecting channel 260 of the second channel 250, the second channel 250 is closed, the second valve core 400 cannot move further, the compound gear 500 cannot rotate, and the support plate 320 cannot move further. At this time, the first valve core 300 moves to the second position.

[0099] During this process, the second channel 250 is slowly and gradually closed. The time that the second channel 250 remains open is sufficient to generate a large bypass flow rate. Combined with the flow rate of the first channel 240, the total bypass flow rate is large, which helps to quickly neutralize the temperature rise caused by the water outage. Finally, the opening of the second channel 250 is reduced until it is closed, reducing the total bypass flow rate and preventing too much cold water from flowing directly out of the outlet channel 220 without heating, which would affect the outlet water temperature.

[0100] When the user turns off the water, the water flow stops, and the tray 320 is no longer propelled by the water flow. The compressed conical spring 600 releases its elasticity, pushing the tray 320 towards the water inlet channel 230. This causes the first valve core 300 to move from the second position to the first position, thereby driving the first rack 310 to move in the opposite direction, driving the compound gear 500 to rotate in the opposite direction, and driving the second rack 410 to move in the opposite direction. This causes the head 420 of the second valve core 400 to move from the second channel 250 through the connecting channel 260 into the first channel 240, increasing the opening of the second channel 250. When the tray 320 abuts against the support platform 211, the first valve core 300 returns to the first position and stops moving, waiting for the user to turn the water back on before resuming the cycle.

[0101] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0102] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A bypass valve, comprising a valve body, a water inlet channel, a water outlet channel and a bypass channel are arranged in the valve body, the bypass channel is communicated with the water inlet channel and the water outlet channel; characterized in that: the bypass channel comprises a first channel, a second channel and a communication channel, the first channel and the second channel are both communicated with the water inlet channel and the water outlet channel, the first channel and the second channel are communicated through the communication channel; the bypass valve further comprises a first valve core and a second valve core, the first valve core and the second valve core are both arranged in the first channel, the first valve core and the second valve core are connected; the first valve core is configured to move between a first position and a second position along the extension direction of the first channel; when the first valve core moves from the first position to the second position, the second valve core moves following the first valve core and at least part of the second valve core moves from the first channel to the second channel through the communication channel to reduce the opening degree of the second channel; when the first valve core moves from the second position to the first position, the second valve core moves following the first valve core and at least part of the second valve core moves from the second channel to the first channel through the communication channel to increase the opening degree of the second channel; the bypass valve further comprises a transmission member, the transmission member is arranged in the first channel, the transmission member is connected between the first valve core and the second valve core; the transmission member comprises a transmission gear, a first rack and a second rack, the first rack is arranged on the first valve core, the second rack is arranged on the second valve core, the first rack and the second rack are both engaged with the transmission gear; the first valve core comprises a supporting plate and a side plate, the supporting plate is connected with the side plate, the first rack is arranged on the side plate; the supporting plate can move towards the direction away from the water inlet channel under the action of water flow to make the first valve core move from the first position to the second position; the second valve core is arranged on the side of the side plate away from the supporting plate, the first rack is arranged on the side surface of the side plate away from the inner wall surface of the first channel and extends along the extension direction of the first channel, the second rack is arranged on the side surface of the second valve core towards the side plate and extends along the direction perpendicular to the extension direction of the first channel; the bypass valve further comprises a reset mechanism, the reset mechanism is connected with the supporting plate, the reset mechanism is used to drive the first valve core to move from the second position to the first position. The transmission gear is a composite gear, the composite gear comprises a first gear and a second gear which are coaxially connected, the diameter of the first gear is larger than the diameter of the second gear; the first rack is engaged with the first gear, the second rack is engaged with the second gear. The bypass valve further comprises a fixing part, the fixing part comprises a supporting part and a supporting shaft; the supporting part is fixedly connected with the valve body, one end of the supporting shaft is fixedly connected with the supporting part, the transmission gear is fixedly connected on the supporting shaft. ​ ​ ​ ​ ​ ​ ​ 2. The bypass valve of claim 1, wherein ​ ​ 3. The bypass valve of claim 1, wherein ​ 4. The bypass valve of claim 3, wherein The support shaft is arranged in the supporting plate.

5. The bypass valve of claim 3, wherein The reset mechanism is a spring, and the support shaft is provided with a convex ring on the outer periphery, and the spring is in abutment between the convex ring and the supporting plate.

6. The bypass valve of claim 5, wherein The reset mechanism is a conical spring, the small end of the conical spring is in abutment with the convex ring, and the large end of the conical spring is in abutment with the supporting plate.

7. The bypass valve of claim 3, wherein The support shaft comprises a hollow mounting cavity, the transmission gear is fixedly connected in the mounting cavity, and the second rack is arranged in the mounting cavity.

8. The bypass valve of claim 1, wherein The second valve core comprises a head, the head is connected to one end of the second rack towards the communication passage, and at least part of the head is slidably arranged in the communication passage.

9. The bypass valve of claim 8, wherein The length of the head along the extension direction of the communication passage is greater than the inner diameter of the second passage.

10. A water heater, characterized by The water heater comprises the bypass valve according to any one of claims 1-9.

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