By-pass valve and water heater comprising same

Abstract

This invention discloses a bypass valve and a water heater containing the same. The bypass valve includes a valve body, a valve core, a fixed seat, a flow orifice, a transmission rod, a rotor, and a reset component. The valve core can slide relative to the fixed seat to adjust the opening of the flow orifice. The rotor is rotatably connected to the transmission rod and can reciprocate along the axis of the transmission rod. The rotor can rotate under the impact of water flow, and one end of the rotor facing the fixed seat in the axial direction of the transmission rod abuts against the valve core, allowing the valve core to slide relative to the fixed seat along the axial direction of the transmission rod. The reset component is used to reset the valve core. When water is used again after a water outage and subsequent heating, the initial water temperature in the outlet channel is high, so more cold water needs to be added to the outlet channel, at which point the opening of the flow orifice is at its maximum. When normal water use resumes, the water temperature is stable, so it is not necessary to add too much cold water to the outlet channel, and the valve core slides relative to the fixed seat to reduce the opening of the flow orifice.

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 in 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 also includes a fixed seat, a flow passage, a transmission rod, a rotor, and a reset element.

[0008] The fixed seat is fixed to the valve body, the peripheral sidewall of the valve core abuts against the peripheral sidewall of the fixed seat, the flow hole is provided on the peripheral sidewall of the valve core and / or the peripheral sidewall of the fixed seat, the water inlet channel and the water outlet channel are connected through the flow hole, and the valve core can slide relative to the fixed seat to adjust the opening of the flow hole.

[0009] The transmission rod is connected to the valve body and remains stationary relative to the valve body. The rotor is sleeved on the transmission rod and rotatably connected to the transmission rod. The rotor can reciprocate along the axial direction of the transmission rod.

[0010] The rotor is capable of rotating under the impact of water flow. The rotor is located at the end of the valve core away from the fixed seat and is rotatably connected to the valve core. The rotor abuts against the valve core at one end face of the fixed seat in the axial direction of the transmission rod, so that the valve core can slide relative to the fixed seat along the axial direction of the transmission rod.

[0011] The reset member is connected to the valve core, and the reset member is used to apply a force to the valve core away from the fixed seat.

[0012] 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 via the bypass channel after the valve core adjusts its opening, thus neutralizing the water temperature in the outlet channel. The rotor rotates under the influence of the water flow and moves along the axis of the transmission rod. Because the rotor abuts against the valve core, it drives the valve core to move synchronously along the axis of the transmission rod, achieving sliding relative to the fixed seat. This changes the opening of the flow orifice, regulating the bypass channel opening and controlling 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 slides relative to the fixed seat to reduce the opening of the flow orifice.

[0013] Preferably, the transmission rod is a threaded rod, the rotor has a threaded hole, and the threaded rod is threadedly engaged with the threaded hole of the rotor.

[0014] In this scheme, the rotor moves along the axis of the transmission rod through the engagement of the threaded rod and the threaded engagement, which also restricts the rotor from easily moving in the opposite direction and ensures the stability of the flow hole opening.

[0015] Preferably, the fixed base is located at one end of the bypass channel near the water outlet channel, the valve core is located at one end of the fixed base facing the water inlet channel, and the rotor is located at one end of the valve core facing the water inlet channel.

[0016] In this scheme, the above-mentioned arrangement allows the rotor and valve core to also be driven by the water flow toward the outlet channel side.

[0017] Preferably, the valve core includes a valve core body and a protrusion, the protrusion being connected to the end of the valve core body away from the fixed seat;

[0018] The rotor includes a connecting seat, which is sleeved on the protrusion and rotatably connected to the protrusion.

[0019] In this solution, the above-mentioned structure is simple and can avoid interference between the rotor and the valve core body, ensuring stable rotation of the rotor relative to the valve core.

[0020] Preferably, the protrusion has a first limiting groove and a first limiting protrusion, the first limiting groove being located on the side of the first limiting protrusion facing the valve core body, and the outer peripheral wall of the protrusion being recessed inward to form the first limiting groove and the first limiting protrusion.

[0021] The connecting seat includes a second limiting groove and a second limiting protrusion. The second limiting protrusion is located on the side of the second limiting groove facing the valve core body. The inner peripheral wall of the connecting seat is recessed inward to form the second limiting groove and the second limiting protrusion.

[0022] The first limiting protrusion is accommodated in the second limiting groove, and the second limiting protrusion is accommodated in the first limiting groove.

[0023] In this solution, the engagement of the first limiting protrusion with the second limiting groove and the engagement of the second limiting protrusion with the first limiting groove can achieve both the locking connection between the protrusion and the connecting seat and the rotation of the rotor relative to the valve core, thus preventing the valve core from rotating synchronously with the rotor.

[0024] Preferably, the minimum flow area of ​​the bypass channel is less than 1 / 3 of the total maximum flow area of ​​the flow orifice.

[0025] In this design, the minimum flow area of ​​the bypass channel is less than 1 / 3 of the total maximum flow area of ​​the flow orifice. This ensures that when the outlet channel first starts discharging hot water, the bypass channel maintains its maximum flow rate to provide sufficient cold water to neutralize the hot water. As the outlet channel continues to discharge water, the opening of the flow orifice gradually decreases. When the opening of the flow orifice is less than 1 / 3 of the total maximum flow area of ​​the flow orifice, the water flow rate of the bypass channel begins to decrease to meet the water temperature requirements of the outlet channel after a period of water discharge.

[0026] Preferably, one of the valve core and the fixed seat is provided with a guide groove, and the other is provided with a guide block. The guide groove extends along the axial direction of the bypass channel, and the guide block cooperates with the guide groove and can slide along the extension direction of the guide groove.

[0027] In this solution, the above-mentioned settings are used to guide the movement direction of the valve core, avoid interference between the valve core and the fixed seat, and improve the reliability of the bypass valve during use.

[0028] Preferably, the reset element is a spring, and the two ends of the spring abut against the valve core and the fixed seat, respectively.

[0029] In this solution, the above-mentioned setup relies on the elastic force of the spring to achieve relative sliding between the valve core and the fixed seat, thereby realizing the reset of the valve core.

[0030] Preferably, the rotor is an impeller, and the axial direction of the impeller is parallel to the axial direction of the bypass channel.

[0031] In this design, the impeller blades rotate under the impact of water flow, thereby achieving the overall rotation of the impeller.

[0032] A water heater comprising a bypass valve as described above.

[0033] In this solution, when the water heater experiences a brief water outage, and the water temperature rises 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 is used continuously, the rotor rotates under the action of water flow, causing the valve core to slide and reduce 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.

[0034] The positive and progressive effects of this invention are as follows: cold water flows in from the inlet channel, hot water flows out from the outlet channel, and a bypass channel connects the inlet and outlet channels. This allows cold water to flow into the outlet channel through the bypass channel after the valve core adjusts its opening, thus neutralizing the water temperature in the outlet channel. The rotor rotates under the action of the water flow and moves along the axis of the transmission rod. Because the rotor abuts against the valve core, it drives the valve core to move synchronously along the axis of the transmission rod, achieving sliding relative to the fixed seat. This changes the opening of the flow orifice, thereby adjusting the opening of the bypass channel and 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 high, 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 it is not necessary to add excessive cold water to the outlet channel. Therefore, the valve core slides relative to the fixed seat to reduce the opening of the flow orifice. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the internal structure of a water heater according to an embodiment of the present invention.

[0036] Figure 2 This is a three-dimensional structural diagram of a bypass valve according to an embodiment of the present invention.

[0037] Figure 3 This is a schematic diagram of the internal structure of the bypass valve when the orifice opening is at its maximum according to an embodiment of the present invention.

[0038] Figure 4This is a three-dimensional structural diagram of the internal structure of a bypass valve according to an embodiment of the present invention.

[0039] Figure 5 This is a schematic diagram of the internal structure of a bypass valve according to an embodiment of the present invention.

[0040] Figure 6 This is another internal structure diagram of the bypass valve according to an embodiment of the present invention.

[0041] Figure 7 This is a schematic diagram of the internal structure of the bypass valve when the orifice opening is at its minimum according to an embodiment of the present invention.

[0042] Explanation of reference numerals in the attached figures:

[0043] Water heater body 11

[0044] Combustion chamber 12

[0045] Heat exchanger 13

[0046] Water inlet pipe 14

[0047] Water outlet pipe 15

[0048] Bypass valve 16

[0049] Valve body 2

[0050] Water inlet channel 21

[0051] Water outlet channel 22

[0052] Bypass Channel 23

[0053] Valve core 3

[0054] Valve core body 31

[0055] Protrusion 32

[0056] First limiting groove 321

[0057] First limiting protrusion 322

[0058] Fixed base 4

[0059] Through hole 41

[0060] Flow hole 5

[0061] Transmission rod 6

[0062] Rotor 7

[0063] Leaf 71

[0064] Connector 72

[0065] Second limiting groove 721

[0066] Second limiting protrusion 722

[0067] Reset component 8

[0068] Water Flow Space 9

[0069] Guide block 101

[0070] Guide groove 102 Detailed Implementation

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] like Figures 2-6 As shown, the bypass valve 16 includes a valve body 2, a valve core 3, a fixed seat 4, a flow passage 5, a transmission rod 6, a rotor 7, and a reset component 8.

[0076] 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.

[0077] like Figure 3 As shown, valve core 3 is located within bypass channel 23. Valve core 3 is configured to move relative to valve body 2 to adjust the opening of bypass channel 23, thereby controlling the flow rate of cold water into outlet channel 22 and regulating the water temperature within outlet channel 22. Fixed seat 4 is located within bypass channel 23 and fixedly connected to valve body 2, meaning fixed seat 4 remains stationary relative to valve body 2. Flow hole 5 is located on the peripheral sidewall of fixed seat 4, and inlet channel 21 and outlet channel 22 are connected through flow hole 5. Valve core 3 and fixed seat 4 are respectively located at both ends of bypass channel 23. Valve core 3 can slide relative to fixed seat 4 to adjust the opening of flow hole 5, thereby regulating the opening of bypass channel 23.

[0078] Specifically, such as Figure 3 , Figure 4 and Figure 7 As shown, the fixed seat 4 is located at one end of the bypass channel 23 near the outlet channel 22, and the valve core 3 is located at the end of the fixed seat 4 facing the inlet channel 21. Both the valve core 3 and the fixed seat 4 are cylindrical structures. The valve core 3 is sleeved on the outer periphery of the fixed seat 4. The inner surface of the peripheral wall of the valve core 3 abuts against the outer surface of the peripheral wall of the fixed seat 4. Here, the abutment is only a small gap between the inner surface of the peripheral wall of the valve core 3 and the outer surface of the peripheral wall of the fixed seat 4 to reduce the flow of water in the gap between the two. However, the inner surface of the peripheral wall of the valve core 3 and the outer surface of the peripheral wall of the fixed seat 4 cannot be completely without gap, otherwise it will affect the smoothness of the sliding of the valve core 3 relative to the fixed seat 4. The valve core 3 and the fixed seat 4 form a hollow water flow space 9. The fixed seat 4 is also provided with several through holes 41. The water flow space 9 is connected to the water outlet channel 22 through the through holes 41. The cold water flowing in from the water inlet channel 21 can only flow into the water flow space 9 through the flow hole 5 and can only flow into the water outlet channel 22 through the through holes 41. Thus, the flow rate of cold water flowing into the water outlet channel 22 can be adjusted by adjusting the opening of the flow hole 5.

[0079] In other alternative embodiments, the flow passage 5 can also be provided on the peripheral sidewall of the valve core 3, with both ends of the flow passage 5 penetrating the peripheral sidewall of the valve core 3 in the radial direction. Alternatively, the diameter of the fixing seat 4 can be larger than the diameter of the valve core 3, and the fixing seat 4 can be sleeved on the outer peripheral surface of the valve core 3.

[0080] In other alternative embodiments, the fixed seat 4 may be located at one end of the bypass channel 23 near the water inlet channel 21, and the valve core 3 may be located at one end of the fixed seat 4 facing the water outlet channel 22.

[0081] like Figure 3 As shown, the transmission rod 6 is connected to the valve body 2 and remains stationary relative to the valve body 2. The rotor 7 is sleeved on the transmission rod 6 and rotatably connected to the transmission rod 6. The rotor 7 can reciprocate along the axial direction of the transmission rod 6. Specifically, in this embodiment, the transmission rod 6 is fixed on the fixed base 4, and the axial direction of the transmission rod 6 is parallel to the axial direction of the bypass channel 23. Compared with the transmission rod 6 being directly fixed to the valve body 2, fixing the transmission rod 6 to the fixed base 4 can reduce the length of the transmission rod 6 and reduce costs. In this embodiment, the transmission rod 6 is a threaded rod with external threads on its outer circumferential surface. The rotor 7 has a threaded hole, and the threaded hole of the rotor 7 cooperates with the threaded rod, converting the rotation of the rotor 7 into the movement of the rotor 7 along the axial direction of the transmission rod 6. Moreover, when the rotor 7 rotates in the same direction, the threaded cooperation can also ensure that the rotor 7 can only move to one side along the axial direction of the transmission rod 6, restricting the rotor 7 from easily moving in the opposite direction (i.e., moving to the other side along the axial direction of the transmission rod 6), and ensuring the stability of the opening of the flow hole 5.

[0082] The rotor 7 can rotate under the impact of water flow. The rotor 7 is located at the end of the valve core 3 away from the fixed seat 4 and is rotatably connected to the valve core 3. The rotor 7 abuts against the valve core 3 at one end facing the fixed seat 4 along the axial direction of the transmission rod 6, allowing the valve core 3 to slide relative to the fixed seat 4 along the axial direction of the transmission rod 6. Specifically, in this embodiment, the rotor 7 is an impeller, and the axial direction of the impeller is parallel to the axial direction of the bypass channel 23. The impeller includes multiple blades 71 and a connecting seat 72. The multiple blades 71 are fixed on the connecting seat 72, and threaded holes are provided on the connecting seat 72. The entire impeller is rotatably connected to the valve core 3 through the connecting seat 72. The blades 71 of the impeller rotate under the impact of water flow, thereby realizing the rotation of the entire impeller. The rotor 7 is located at the end of the valve core 3 facing the inlet channel 21, so that the rotor 7 and the valve core 3 can also be driven by the water flow towards the outlet channel 22. Since the rotor 7 abuts against the valve core 3, when the rotor 7 moves toward the fixed seat 4 along the axis of the transmission rod 6, it will abut against the valve core 3 and drive the valve core 3 to move synchronously toward the fixed seat 4, thereby realizing the sliding of the valve core 3 relative to the fixed seat 4, thereby changing the opening of the flow hole 5, realizing the opening adjustment of the bypass channel 23, and adjusting the flow rate of cold water entering the outlet channel 22 from the inlet channel 21.

[0083] In other alternative embodiments, when the valve core 3 is located at one end of the fixed base 4 facing the water outlet channel 22, the rotor 7 is located at one end of the valve core 3 facing the water outlet channel 22.

[0084] like Figure 3 As shown, the reset element 8 is connected to the valve core 3, and the reset element 8 is used to apply a force to the valve core 3 away from the fixed seat 4. Specifically, in this embodiment, the reset element 8 is a spring, which is disposed in the water flow space 9. The two ends of the spring abut against the valve core 3 and the fixed seat 4, respectively. When the valve core 3 moves toward the fixed seat 4, the spring is compressed. When water flow stops, the rotor 7 stops rotating, the spring force is released, and the valve core 3 is driven to move away from the fixed seat 4 to achieve the reset of the valve core 3. How to use the spring to achieve the reverse movement of the rotor 7 on the threaded rod to achieve the reset of the valve core 3 is prior art in this field and will not be described in detail here.

[0085] In other alternative embodiments, the reset member 8 may also be other elastic members capable of achieving the above-described functions.

[0086] When water is used again after a water outage and subsequent heating, a larger amount of cold water needs to be added to the outlet channel 22 because the initial water temperature is higher. At this time, the opening of the flow orifice 5 is at its maximum. When normal water use resumes, the water temperature is stable, so it is not necessary to add too much cold water to the outlet channel 22. Therefore, the valve core 3 slides relative to the fixed seat 4 to reduce the opening of the flow orifice 5.

[0087] like Figure 5 As shown, the valve core 3 includes a valve core body 31 and a protrusion 32, the protrusion 32 being connected to the end of the valve core body 31 away from the fixed seat 4. A connecting seat 72 is sleeved on the protrusion 32, and the connecting seat 72 is rotatably connected to the protrusion 32. Specifically, the protrusion 32 has a first limiting groove 321 and a first limiting protrusion 322. The first limiting groove 321 is located on the side of the first limiting protrusion 322 facing the valve core body 31, and the outer peripheral wall of the protrusion 32 is recessed inward to form the first limiting groove 321 and the first limiting protrusion 322. The connecting seat 72 includes a second limiting groove 721 and a second limiting protrusion 722, the second limiting protrusion 722 being located on the side of the second limiting groove 721 facing the valve core body 31, and the inner peripheral wall of the connecting seat 72 is recessed inward to form the second limiting groove 721 and the second limiting protrusion 722. The first limiting protrusion 322 is accommodated within the second limiting groove 721, and the second limiting protrusion 722 is accommodated within the first limiting groove 321.

[0088] In this embodiment, the engagement of the first limiting protrusion 322 with the second limiting groove 721 and the engagement of the second limiting protrusion 722 with the first limiting groove 321 achieves both the engaging connection between the protrusion 32 and the connecting seat 72 and the rotation of the rotor 7 relative to the valve core 3, preventing the valve core 3 from rotating synchronously with the rotor 7. The protrusion 32 and connecting seat 72 in the above structure are simple in design, preventing interference between the rotor 7 and the valve core body 31 and ensuring stable rotation of the rotor 7 relative to the valve core 3.

[0089] like Figure 6 As shown, the fixed seat 4 is provided with a guide groove 102, and the valve core 3 is provided with a guide block 101. The guide groove 102 extends along the axial direction of the bypass channel 23. The guide block 101 cooperates with the guide groove 102 and can slide along the extension direction of the guide groove 102 to guide the movement direction of the valve core 3, avoid interference between the valve core 3 and the fixed seat 4, and improve the reliability of the bypass valve 16 during use.

[0090] In other alternative embodiments, the guide groove 102 may be disposed on the valve core 3 and the guide block 101 may be disposed on the fixed seat 4.

[0091] In this embodiment, the minimum flow area of ​​the bypass channel 23 is less than 1 / 3 of the total maximum flow area of ​​the flow holes 5. This ensures that when the outlet channel 22 initially dispenses hot water, the bypass channel 23 maintains its maximum flow rate to provide sufficient cold water to neutralize the hot water. As the outlet channel 22 continues to dispense water, the opening of the flow holes 5 gradually decreases. When the opening of the flow holes 5 is less than 1 / 3 of the total maximum flow area of ​​the flow holes 5, the water flow rate of the bypass channel 23 begins to decrease to meet the water temperature requirements of the outlet channel 22 after a period of water dispensing. Here, the minimum flow area of ​​the bypass channel 23 refers to the area at the smallest cross-section of the bypass channel 23, which in this embodiment can be understood as the sum of the cross-sectional areas of all through holes 41 on the fixed base 4. The total maximum flow area of ​​the flow holes 5 refers to the sum of the areas of all flow holes 5 when they are not blocked.

[0092] Based on the specific structure of the bypass valve 16 mentioned above, the principle of bypass valve 16 opening adjustment is briefly described below.

[0093] When water supply is stopped, such as Figure 3 As shown, the opening of the flow orifice 5 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.

[0094] When water usage gradually returns to normal, there is no need to add more cold water into the outlet channel 22, therefore... Figure 7 As shown, the impeller rotates under the action of water flow. Adjusting the engagement position of the impeller and the threaded rod causes the impeller to move the valve core 3 towards the fixed seat 4, gradually reducing the opening of the flow orifice 5 until the spring force and the force exerted by the water flow on the rotor 7 are balanced. At this point, the opening of the flow orifice 5 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 spring drives the rotor 7 to rotate in the opposite direction, thereby increasing the opening of the flow orifice 5 to its maximum.

[0095] 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, wherein the valve body has an inlet channel, an outlet channel, and a bypass channel, the two ends of the bypass channel being respectively connected to the inlet channel and the outlet channel, the valve core being disposed within the bypass channel, and the valve core being configured to move relative to the valve body to adjust the opening degree of the bypass channel; characterized in that, The bypass valve also includes a fixed seat, a flow passage, a transmission rod, a rotor, and a reset component; The fixed seat is fixed to the valve body, the peripheral sidewall of the valve core abuts against the peripheral sidewall of the fixed seat, the flow hole is provided on the peripheral sidewall of the valve core and / or the peripheral sidewall of the fixed seat, the water inlet channel and the water outlet channel are connected through the flow hole, and the valve core can slide relative to the fixed seat to adjust the opening of the flow hole. The transmission rod is connected to the valve body and remains stationary relative to the valve body. The rotor is sleeved on the transmission rod and rotatably connected to the transmission rod. The rotor can reciprocate along the axial direction of the transmission rod. The rotor is capable of rotating under the impact of water flow. The rotor is located at the end of the valve core away from the fixed seat and is rotatably connected to the valve core. The rotor abuts against the valve core at one end face of the fixed seat in the axial direction of the transmission rod, so that the valve core can slide relative to the fixed seat along the axial direction of the transmission rod. The reset member is connected to the valve core, and the reset member is used to apply a force to the valve core away from the fixed seat.

2. The bypass valve as described in claim 1, characterized in that, The transmission rod is a threaded rod, and the rotor has a threaded hole. The threaded rod is threadedly engaged with the threaded hole of the rotor.

3. The bypass valve as described in claim 1, characterized in that, The fixed base is located at one end of the bypass channel near the water outlet channel, the valve core is located at one end of the fixed base facing the water inlet channel, and the rotor is located at one end of the valve core facing the water inlet channel.

4. The bypass valve as described in claim 1, characterized in that, The valve core includes a valve core body and a protrusion, the protrusion being connected to the end of the valve core body away from the fixed seat; The rotor includes a connecting seat, which is sleeved on the protrusion and rotatably connected to the protrusion.

5. The bypass valve as described in claim 4, characterized in that, The protrusion has a first limiting groove and a first limiting protrusion. The first limiting groove is located on the side of the first limiting protrusion facing the valve core body. The outer peripheral wall of the protrusion is recessed inward to form the first limiting groove and the first limiting protrusion. The connecting seat includes a second limiting groove and a second limiting protrusion. The second limiting protrusion is located on the side of the second limiting groove facing the valve core body. The inner peripheral wall of the connecting seat is recessed inward to form the second limiting groove and the second limiting protrusion. The first limiting protrusion is accommodated in the second limiting groove, and the second limiting protrusion is accommodated in the first limiting groove.

6. The bypass valve as described in claim 1, characterized in that, The minimum flow area of ​​the bypass channel is less than 1 / 3 of the total maximum flow area of ​​the flow orifice.

7. The bypass valve as described in claim 1, characterized in that, One of the valve core and the fixed seat is provided with a guide groove, and the other is provided with a guide block. The guide groove extends along the axial direction of the bypass channel, and the guide block cooperates with the guide groove and can slide along the extension direction of the guide groove.

8. The bypass valve as described in claim 1, characterized in that, The reset component is a spring, and the two ends of the spring abut against the valve core and the fixed seat, respectively.

9. The bypass valve as described in any one of claims 1-8, characterized in that, The rotor is an impeller, and the axis of the impeller is parallel to the axis of the bypass channel.

10. A water heater, characterized in that, The water heater includes a bypass valve as described in any one of claims 1-9.

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