By-pass valve and water heater comprising same

Abstract

The application discloses a bypass valve and a water heater comprising the same. The bypass valve comprises a valve body, a valve core, a first fixed seat, a driving member and a transmission member. The valve core is arranged to be movable relative to the valve body to adjust the opening degree of a bypass passage of the valve body. The first fixed seat is provided with a plurality of flow holes. A water inlet passage of the valve body is communicated with a water outlet passage of the valve body through the flow holes. The driving member is arranged to be rotatable under the impact of water flow. The transmission member is connected with the driving member and is rotatable along with the driving member. A first tooth portion of the transmission member and a second tooth portion of the valve core are matched. The valve core is rotatable synchronously with the transmission member to adjust the opening degree of the flow holes. When water is used again after water stop and temperature rise, the initial water temperature in the water outlet passage is high, so that more cold water needs to be added to the water outlet passage. At this time, the opening degree of the flow holes is maximum. When normal water use is resumed, the water temperature is stable, so that too much cold water does not need to be added to the water outlet passage. Therefore, the valve core is rotated to reduce the opening degree of the flow holes.

Description

Technical Field

[0001] This invention relates to the field of water heaters, and more particularly to a bypass valve and a water heater comprising 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 water outages. When the user reopens the valve, they may experience discomfort from the hot water.

[0004] Currently, water heaters have a bypass pipe connecting the inlet and outlet pipes. This allows some cold water to bypass the heat exchanger and flow directly through the bypass pipe to the water heater's outlet pipe. This cold water is used to neutralize the hot water caused by temperature rise during water outages. However, a conventional bypass pipe is a flow channel with a fixed cross-section, and the bypass flow rate cannot be adjusted, making the outlet water temperature uncontrollable. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the defect that the flow rate of the bypass pipe of the water heater is difficult to adjust in the prior art, and to provide a bypass valve and a water heater containing the bypass valve.

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

[0007] A bypass valve includes a valve body and a valve core. The valve body has an inlet channel, an outlet channel, and a bypass channel. The two ends of the bypass channel are respectively connected to the inlet channel and the outlet channel. The valve core is disposed within the bypass channel and is configured to move relative to the valve body to adjust the opening degree of the bypass channel. The bypass valve further includes:

[0008] A first fixed seat is disposed in the bypass channel and fixedly connected to the valve body. The first fixed seat is provided with a plurality of flow holes. The flow holes pass through both ends in the axial direction of the bypass channel. The water inlet channel is connected to the water outlet channel through the flow holes.

[0009] The drive component is configured to rotate under the impact of water flow.

[0010] A transmission component is connected to the driving component and can rotate with the driving component; the transmission component includes a first tooth, and the valve core includes a second tooth; the first tooth and the second tooth cooperate with each other, and the valve core can rotate synchronously with the transmission component to adjust the opening of the flow orifice.

[0011] In this design, cold water flows in through the inlet channel and hot water flows out through the outlet channel. A bypass channel connects the inlet and outlet channels, allowing cold water to flow into the outlet channel after the valve core adjusts its opening, thus neutralizing the water temperature in the outlet channel. The drive component rotates under the influence of water flow, which in turn drives the connected transmission component, which in turn drives the valve core connected to the transmission component. The valve core changes the opening of the flow orifice to regulate the bypass channel opening, thereby adjusting the flow rate of cold water entering the outlet channel from the inlet channel. When water is used again after a water outage and subsequent heating, the initial water temperature in the outlet channel is higher, requiring more cold water to be added, resulting in the maximum opening of the flow orifice. When normal water use resumes, the water temperature is stable, so less cold water needs to be added to the outlet channel; therefore, the valve core rotates to reduce the opening of the flow orifice.

[0012] Preferably, the transmission component includes a transmission rod and a first gear, the transmission rod is connected to the driving component, the first gear is sleeved on the transmission rod, the first gear is an external gear, and the external teeth of the first gear form the first tooth portion;

[0013] The valve core is annular and is sleeved on the outer periphery of the first gear. The inner ring of the valve core has a circumferentially arranged rack, which forms the second tooth portion.

[0014] In this design, the valve core is rotated by the engagement between the first and second teeth.

[0015] Preferably, the transmission component further includes a plurality of second gears, the second gears being external gears, and the second gears meshing between the first tooth portion and the second tooth portion.

[0016] In this design, the second gear can reduce the speed transmitted from the first gear to the valve core. When water is used again after the water temperature rises following a water outage, the valve core rotates at a slower speed, so the opening of the flow orifice decreases more slowly, thus maintaining a high flow rate for a longer period of time and improving the water temperature rise during water outages.

[0017] Preferably, the valve core further includes a valve core body and a blocking portion, wherein the second tooth is disposed on the inner circumferential surface of the valve core body, and a portion of the outer circumferential surface of the valve core body protrudes outward to form the blocking portion;

[0018] When the valve core rotates, the shielding part can at least partially cover the flow hole.

[0019] In this solution, the opening degree of the flow orifice is adjusted by controlling the coverage area of ​​the shielding part over the flow orifice.

[0020] Preferably, there are multiple shielding parts, and the multiple shielding parts are spaced apart along the circumferential direction of the valve core;

[0021] The valve core further includes a flow passage, and the flow passage is formed by the interval between two adjacent blocking portions; the interval between two adjacent blocking portions in the circumferential direction of the valve core is greater than the length of a single flow passage in the circumferential direction of the valve core.

[0022] In this scheme, the above settings make the water flow in the bypass channel more uniform.

[0023] Preferably, the first fixing seat is provided with a positioning post, which can abut against the circumferential side of the blocking part.

[0024] In this design, the positioning pin plays a role in positioning the rotation range of the valve core, thereby improving the adjustment accuracy of the flow orifice.

[0025] Preferably, the first fixed seat is located at one end of the bypass channel near the inlet channel. The bypass valve also includes a second fixed seat, which is located in the bypass channel and fixedly connected to the valve body. The second fixed seat is located at one end of the bypass channel near the outlet channel. The two ends of the transmission rod are respectively connected to the first fixed seat and the second fixed seat.

[0026] In this design, the transmission rod is fixed together by the first fixed seat and the second fixed seat to ensure the stability of the transmission rod during rotation.

[0027] Preferably, the valve core rotates about the axis of the bypass channel, and the valve core rotates in a first direction under the drive of the drive member. The bypass valve also includes a reset member connected to the valve core, and the reset member is used to apply a force to the valve core in the opposite direction to the first direction.

[0028] In this design, the reset element is used to cause the valve core to rotate in the opposite direction, thereby increasing the opening of the flow orifice.

[0029] Preferably, the reset element is a spiral spring, and the axial direction of the spiral spring is parallel to the axial direction of the bypass channel.

[0030] This solution provides a specific structure for a spiral spring.

[0031] Preferably, the driving member is disposed in the water inlet channel or the water outlet channel, and the spiral spring is connected to the end of the driving member away from the transmission member.

[0032] In this design, the above-mentioned configuration avoids the vortex spring affecting the water flow rate in the bypass channel.

[0033] Preferably, the end of the water inlet channel or the water outlet channel away from the bypass channel is provided with a receiving groove, and the spiral spring is disposed in the receiving groove.

[0034] In this solution, the above-mentioned arrangement avoids the vortex spring affecting the water flow rate in the inlet or outlet channel.

[0035] Preferably, the driving component is an impeller, and the axis of the impeller is parallel to the axis of the bypass channel.

[0036] In this design, the impeller blades rotate under the impact of water flow, thereby driving the valve core to rotate.

[0037] A water heater comprising a bypass valve as described above.

[0038] In this solution, when the water heater experiences a brief water outage, causing a temperature rise due to the heater's thermal inertia, if the user turns on the hot water, cold water can enter the outlet channel through the bypass channel to neutralize the hot water in the outlet channel. Simultaneously, as hot water continues to be used, the drive component rotates under the action of water flow, causing the valve core to rotate and reducing the opening of the flow orifice. This allows the excessively hot water that was overheated due to the water outage to be discharged, reducing the amount of cold water entering the outlet channel through the bypass channel. This prevents excessive cold water from causing the water temperature to fall below the user's required level.

[0039] The significant advantages of this invention are as follows: cold water flows in through the inlet channel, hot water flows out through the outlet channel, and a bypass channel connects the inlet and outlet channels. This allows cold water to flow into the outlet channel via the bypass channel after the valve core adjusts its opening, thus neutralizing the water temperature in the outlet channel. The driving component rotates under the influence of water flow, which in turn drives the connected transmission component to rotate, which in turn drives the valve core connected to the transmission component to rotate. The valve core changes the opening of the flow orifice to adjust the bypass channel opening, thereby regulating the flow rate of cold water entering the outlet channel from the inlet channel. When water is used again after a water outage and subsequent heating, the initial water temperature in the outlet channel is higher, requiring more cold water to be added, resulting in the maximum opening of the flow orifice. When normal water use resumes, the water temperature is stable, so less cold water needs to be added to the outlet channel; therefore, the valve core rotates to reduce the opening of the flow orifice. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the internal structure of a water heater according to an embodiment of the present invention.

[0041] Figure 2 This is a three-dimensional structural diagram of a bypass valve according to an embodiment of the present invention.

[0042] Figure 3 This is a schematic diagram of the internal structure of a bypass valve according to an embodiment of the present invention.

[0043] Figure 4 This is a three-dimensional structural diagram of the internal structure of a bypass valve according to an embodiment of the present invention.

[0044] Figure 5 This is a schematic diagram of the structure when the opening of the flow orifice is at its maximum according to an embodiment of the present invention.

[0045] Figure 6 This is a schematic diagram of the structure when the opening of the flow orifice is at its minimum according to an embodiment of the present invention.

[0046] Explanation of reference numerals in the attached figures:

[0047] Water heater body 11

[0048] Combustion chamber 12

[0049] Heat exchanger 13

[0050] Water inlet pipe 14

[0051] Water outlet pipe 15

[0052] Bypass valve 16

[0053] Valve body 2

[0054] Water inlet channel 21

[0055] Water outlet channel 22

[0056] Bypass Channel 23

[0057] Valve core 3

[0058] Second tooth 31

[0059] Valve core body 32

[0060] Shielding part 33

[0061] Flow section 34

[0062] First fixed seat 4

[0063] Flow hole 41

[0064] Second fixing seat 5

[0065] Drive component 6

[0066] Transmission component 7

[0067] First gear 71

[0068] First tooth 711

[0069] Second gear 72

[0070] Transmission rod 73

[0071] 8-stroke spring

[0072] Positioning post 9 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 described herein.

[0074] like Figure 1 As shown, this embodiment discloses a water heater, including a water heater body 11, an inlet pipe 14, an outlet pipe 15, and a bypass valve 16. The water heater body 11 includes a combustion chamber 12 and a heat exchanger 13, through which gas is introduced for combustion. Both the inlet pipe 14 and the outlet pipe 15 are connected to the heat exchanger 13. Cold water flows into the heat exchanger 13 from the inlet pipe 14. The heat exchanger 13 is located in the combustion chamber 12 to exchange heat with the water under the heating of the combustion chamber 12. The heated hot water flows out from the outlet pipe 15. The bypass valve 16 is connected between the inlet pipe 14 and the outlet pipe 15, allowing the cold water in the inlet pipe 14 to flow into the outlet pipe 15 through the bypass valve 16 to neutralize the hot water in the outlet pipe 15.

[0075] When the user stops using water, the combustion chamber 12 stops heating. However, the temperature of the heat exchanger 13 remains high. Due to the thermal inertia of the heat exchanger 13, it continues to exchange heat with the water inside for a period of time, causing the water temperature in that section to become too high, resulting in a temperature rise due to water outage. If the user uses hot water directly at this time, it can easily cause discomfort or even scalding. In this embodiment, cold water in the inlet pipe 14 is diverted through the bypass valve 16 into the outlet pipe 15 to neutralize the hot water in the outlet pipe 15, thereby reducing the water temperature in that section that is too high due to the temperature rise during water outage and improving the user experience.

[0076] It should be noted that the water heater is not limited to the gas water heater that heats water by gas combustion in this embodiment. In other embodiments, the water heater may also be an electric water heater or other suitable water heater.

[0077] like Figures 2-4 As shown, the bypass valve 16 includes a valve body 2, a valve core 3, a first fixed seat 4, a second fixed seat 5, a driving component 6, a transmission component 7, and a reset component.

[0078] like Figure 3As shown, the valve body 2 has an inlet channel 21, an outlet channel 22, and a bypass channel 23. The inlet channel 21 is connected to the inlet pipe 14 of the water heater and is used to flow cold water. The outlet channel 22 is connected to the outlet pipe 15 of the water heater and is used to flow hot water. The bypass channel 23 is located between the inlet channel 21 and the outlet channel 22, with both ends connected to the inlet channel 21 and the outlet channel 22 respectively, so that the cold water in the inlet channel 21 can flow into the outlet channel 22 through the bypass channel 23 to neutralize the hot water in the outlet channel 22.

[0079] like Figure 3 , Figure 5 and Figure 6 As shown, the first fixed seat 4 is disposed in the bypass channel 23 and fixedly connected to the valve body 2. The first fixed seat 4 is provided with a plurality of flow holes 41, which are connected at both ends in the axial direction of the bypass channel 23. The water inlet channel 21 is connected to the water outlet channel 22 through the flow holes 41. Specifically, in this embodiment, there are multiple flow holes 41, which are spaced apart along the circumferential direction of the bypass channel 23.

[0080] like Figure 3 and Figure 4 As shown, the valve core 3 is located within the bypass channel 23. The valve core 3 is configured to move relative to the valve body 2 to adjust the opening of the bypass channel 23, thereby controlling the flow rate of cold water into the outlet channel 22 and regulating the water temperature within the outlet channel 22. Specifically, the valve core 3 is positioned close to the first fixed seat 4. During rotation, the valve core 3 can at least partially cover the flow hole 41, thereby adjusting the opening of the bypass channel 23 by adjusting the opening of the flow hole 41.

[0081] like Figure 3 and Figure 4 As shown, the driving component 6 is configured to rotate under the impact of water flow. The transmission component 7 is connected between the driving component 6 and the valve core 3 and can rotate with the driving component 6, thereby driving the valve core 3 connected to it to rotate. This allows the opening of the flow hole 41 to be adjusted by changing the range covered by the valve core 3. Specifically, in this embodiment, the driving component 6 is an impeller with its axis parallel to the axis of the bypass channel 23. The blades of the impeller rotate under the impact of water flow, thereby driving the valve core 3 to rotate. The valve core 3 rotates around the axis of the bypass channel 23. The valve core 3 rotates in a first direction under the drive of the driving component 6. The driving component 6 is used to drive the valve core 3 to rotate to reduce the opening of the flow hole 41.

[0082] like Figure 4As shown, the transmission component 7 includes a first toothed portion 711, and the valve core 3 includes a second toothed portion 31. The first toothed portion 711 and the second toothed portion 31 cooperate to enable the valve core 3 to rotate synchronously with the transmission component 7 to adjust the opening of the flow orifice 41. Specifically, the transmission component 7 includes a transmission rod 73 and a first gear 71. The transmission rod 73 is connected to the drive component 6, and the first gear 71 is sleeved on the transmission rod 73. The first gear 71 is an external gear, and the external teeth of the first gear 71 form the first toothed portion 711. The valve core 3 is annular and is sleeved on the outer periphery of the first gear 71. The inner ring of the valve core 3 has a circumferentially arranged rack, and the rack forms the second toothed portion 31. In this embodiment, the transmission component 7 drives the valve core 3 to rotate through the cooperation between the first toothed portion 711 and the second toothed portion 31.

[0083] It should be noted that the valve core 3 in this embodiment is annular, which does not mean that the valve core 3 can only be a conventional annular structure. It can also be an irregular annular structure, as long as the center of the valve core 3 is hollow and has an annular toothed rack.

[0084] like Figure 3 and Figure 4 As shown, the reset element is connected to the valve core 3, and the reset element is used to apply a force to the valve core 3 in the opposite direction to the first direction. The reset element is used to cause the valve core 3 to rotate in the opposite direction, so as to increase the opening of the flow orifice 41. Specifically, the reset element in this embodiment is a spiral spring 8, and the axis of the spiral spring 8 is parallel to the axis of the bypass channel 23. When the driving element 6 drives the valve core 3 to rotate under the action of water flow, the spiral spring 8 accumulates elastic force. When water is used again after the water is stopped and the temperature is raised, the spiral spring 8 releases the elastic force, causing the valve core 3 to rotate in the opposite direction.

[0085] In this embodiment, the drive component 6 rotates under the action of water flow, thereby driving the transmission component 7 connected to it to rotate. Through the cooperation between the first tooth 711 and the second tooth 31, the valve core 3 connected to the transmission component 7 is driven to rotate. The valve core 3 changes the opening of the flow orifice 41 to adjust the opening of the bypass channel 23, thereby regulating the flow rate of cold water entering the outlet channel 22 from the inlet channel 21. When water is used again after a water outage and heating, because the initial water temperature in the outlet channel 22 is high, more cold water needs to be added to the outlet channel 22, at which time the opening of the flow orifice 41 is at its maximum. When normal water use resumes, because the water temperature is stable, it is not necessary to add too much cold water to the outlet channel 22, so the valve core 3 rotates to reduce the opening of the flow orifice 41.

[0086] In other alternative implementations, the reset element may also be other elastic components capable of performing the above-described functions.

[0087] like Figure 4As shown, the transmission component 7 also includes several second gears 72, which are external gears that mesh between the first tooth portion 711 and the second tooth portion 31. Specifically, there are multiple second gears 72, which are spaced apart along the circumferential direction of the bypass channel 23, and each second gear 72 meshes between the first tooth portion 711 and the second tooth portion 31. In this embodiment, the second gear 72 is a planetary gear, which can reduce the speed transmitted from the first gear 71 to the valve core 3. When water is used again after a water outage and temperature rise, the valve core 3 rotates at a slower speed, so the opening of the flow orifice 41 decreases more slowly, thus maintaining a high flow rate for a longer period of time and better improving the water outage and temperature rise.

[0088] like Figure 4 As shown, the valve core 3 also includes a valve core body 32 and a blocking portion 33. The second tooth 31 is disposed on the inner circumferential surface of the valve core body 32, and a portion of the outer circumferential surface of the valve core body 32 protrudes outward to form the blocking portion 33. When the valve core 3 rotates, the blocking portion 33 can at least partially cover the flow passage 41. The opening degree of the flow passage 41 can be adjusted by controlling the coverage range of the blocking portion 33 over the flow passage 41. Specifically, in this embodiment, there are multiple blocking portions 33, and the number of blocking portions 33 is the same as the number of flow passages 41. The multiple blocking portions 33 are spaced apart along the circumferential direction of the valve core 3 (i.e., the circumferential direction of the bypass channel 23). The valve core 3 also includes a flow passage 34, and the interval between two adjacent blocking portions 33 forms the flow passage 34. The number of flow passages 34 is also the same as the number of flow passages 41. The distance between two adjacent shielding parts 33 in the circumferential direction of the valve core 3 is greater than the length of a single flow hole 41 in the circumferential direction of the valve core 3, so that the valve core 3 can control the opening of multiple flow holes 41 at the same time, and make the water flow in the bypass channel 23 more uniform.

[0089] Furthermore, such as Figure 5 and Figure 6 As shown, a positioning post 9 is provided on the first fixed base 4. The positioning post 9 is fixedly connected to the first fixed base 4, and the relative positions of the two are fixed. The positioning post 9 protrudes towards the valve core 3 so that the positioning post 9 can abut against the circumferential side of the shielding part 33, thereby controlling the rotation range of the valve core 3 through the positioning post 9 and improving the adjustment accuracy of the flow passage 41.

[0090] like Figure 3 As shown, the first fixed seat 4 is located at one end of the bypass channel 23 near the water inlet channel 21, and the second fixed seat 5 is located inside the bypass channel 23 and fixedly connected to the valve body 2. The second fixed seat 5 is located at one end of the bypass channel 23 near the water outlet channel 22. The two ends of the transmission rod 73 are connected to the first fixed seat 4 and the second fixed seat 5 respectively. In this embodiment, the transmission rod 73 is fixed by the first fixed seat 4 and the second fixed seat 5 together, so as to ensure the stability of the transmission rod 73 during rotation.

[0091] In other alternative embodiments, the first fixing seat 4 may be installed at one end near the water outlet channel 22, and the second fixing seat 5 may be installed at one end near the water inlet channel 21.

[0092] like Figure 3 As shown, in this embodiment, the drive component 6 is disposed within the water outlet channel 22. During normal use, the water flow within the water outlet channel 22 is greater, which can better drive the impeller to rotate. The scroll spring 8 is connected to the end of the drive component 6 away from the transmission component 7 to prevent the scroll spring 8 from affecting the water flow rate within the bypass channel 23. Specifically, the end of the water outlet channel 22 away from the bypass channel 23 is provided with a receiving groove, and the scroll spring 8 is disposed within the receiving groove to further prevent the scroll spring 8 from affecting the water flow rate within the water outlet channel 22.

[0093] In other alternative embodiments, the drive element 6 can also be disposed in the water inlet channel 21. In this case, the spiral spring 8 is also disposed in the water inlet channel 21. The receiving groove for accommodating the spiral spring 8 is disposed at the end of the water inlet channel 21 away from the bypass channel 23, so as to avoid the spiral spring 8 affecting the water flow in the water inlet channel 21.

[0094] Based on the specific structure of the bypass valve 16 mentioned above, the principle of bypass valve 16 opening adjustment is briefly described below.

[0095] When water supply is stopped, such as Figure 5 As shown, the opening of the flow orifice 41 is at its maximum at this time, allowing the maximum amount of cold water to flow from the inlet channel 21 into the outlet channel 22. Therefore, when water is used again after a water outage and subsequent heating, a larger amount of cold water initially enters the outlet channel 22, which can neutralize the higher water temperature.

[0096] When water usage gradually returns to normal, there is no need to add more cold water into the outlet channel 22, therefore... Figure 6 As shown, the impeller drives the valve core 3 to rotate, and the valve core 3 gradually covers more of the flow passage 41 until it abuts against the positioning post 9. At this time, the opening of the flow passage 41 is at its minimum, and the inflow of cold water is at its minimum, avoiding other problems caused by a large bypass flow, such as cold water flowing out directly without heating, or water boiling due to a small flow through the heat exchanger 13. When the water supply is turned off again, the scroll spring 8 drives the valve core 3 to rotate in the opposite direction, thereby increasing the opening of the flow passage 41 to its maximum.

[0097] 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 and a valve core, the valve body having a water inlet passage, a water outlet passage and a bypass passage therein, two ends of the bypass passage being communicated to the water inlet passage and the water outlet passage respectively, the valve core being arranged in the bypass passage, the valve core being arranged to be movable relative to the valve body to adjust the opening degree of the bypass passage; characterized in that, The bypass valve further comprises: A first fixed seat is arranged in the bypass channel and fixedly connected with the valve body, a plurality of flow holes are arranged on the first fixed seat, both ends of the flow holes in the axial direction of the bypass channel are penetrated, and the water inlet channel communicates with the water outlet channel through the flow holes; The driving member is arranged to be capable of rotating under the impact of water flow; The transmission member is connected with the driving member and is capable of rotating with the driving member; the transmission member comprises a first gear portion, the valve core comprises a second gear portion, the first gear portion is matched with the second gear portion, and the valve core is capable of rotating synchronously with the transmission member to adjust the opening degree of the flow hole; The transmission member comprises a transmission rod and a first gear, the transmission rod is connected with the driving member, the first gear is sleeved on the transmission rod, the first gear is an external gear, and the external teeth of the first gear form the first gear portion; The valve core is a circular ring, the valve core is sleeved on the outer periphery of the first gear, the inner ring of the valve core is provided with a circumferentially arranged rack, and the rack forms the second gear portion; The valve core further comprises a valve core body and a shielding portion, the second gear portion is arranged on the inner peripheral surface of the valve core body, and part of the outer peripheral surface of the valve core body protrudes outward to form the shielding portion; When the valve core rotates, the shielding portion can at least partially cover the flow hole; The number of the shielding portions is a plurality, and the plurality of shielding portions are arranged at intervals in the circumferential direction of the valve core; The valve core further comprises a flow portion, the interval between the two adjacent shielding portions forms the flow portion, and the interval distance of the two adjacent shielding portions in the circumferential direction of the valve core is greater than the length of a single flow hole in the circumferential direction of the valve core.

2. The bypass valve of claim 1, wherein The transmission member further comprises a plurality of second gears, the second gears are external gears, and the second gears are engaged between the first gear portion and the second gear portion.

3. The bypass valve of claim 1, wherein The first fixed seat is provided with a positioning column, and the positioning column can abut against the circumferential side surface of the shielding portion.

4. The bypass valve of claim 1, wherein The first fixed seat is arranged at one end of the bypass channel close to the water inlet channel, the bypass valve further comprises a second fixed seat, the second fixed seat is arranged in the bypass channel and fixedly connected with the valve body, the second fixed seat is arranged at one end of the bypass channel close to the water outlet channel, and the two ends of the transmission rod are connected with the first fixed seat and the second fixed seat respectively.

5. The bypass valve of claim 1, wherein The valve core rotates around the axial direction of the bypass channel, that is, the valve core rotates in a first direction under the drive of the driving member, the bypass valve further comprises a reset member, the reset member is connected with the valve core, and the reset member is used for applying an acting force in a direction opposite to the first direction to the valve core.

6. The bypass valve of claim 5, wherein The reset member is a volute spring, and the axial direction of the volute spring is parallel to the axial direction of the bypass channel.

7. The bypass valve of claim 6, wherein The driving member is arranged in the water inlet channel or the water outlet channel, and the volute spring is connected with one end of the driving member away from the transmission member.

8. The bypass valve of claim 7, wherein One end of the water inlet channel or the water outlet channel away from the bypass channel is provided with a containing groove, and the volute spring is arranged in the containing groove.

9. The bypass valve according to any one of claims 1 to 8, characterized in that The drive member is an impeller, the axis of which is parallel to the axis of the bypass channel.

10. A water heater, characterized by The water heater comprises a bypass valve as claimed in any one of claims 1 to 9.

Images