Bypass valve and gas water heater

Abstract

The application provides a bypass valve and a gas water heater, and relates to the technical field of water heaters. The bypass valve comprises a valve body, the valve body is provided with a water inlet channel, a water outlet channel, a first bypass path and a second bypass path; a first valve core is arranged in the first bypass path and is used for moving in the direction close to the water outlet channel under the action of water flow; a first reset member is used for applying an acting force to the first valve core to move the first valve core in the direction away from the water outlet channel; a driving member is used for driving the first valve core to rotate around the axial direction of the first bypass path; the opening degree of the second bypass path gradually decreases in the process that a second valve core rotates from a first position to a second position; and a first transmission part is used for acting on a second transmission part and driving the second transmission part to rotate around the axial direction of a transmission channel when the first valve core rotates around the axial direction of the first bypass path. Through the above structure, the total bypass flow of the bypass valve can be adjusted on the basis of ensuring the minimum bypass flow, and the stability of the bypass flow control is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water heaters, in particular to a bypass valve and a gas water heater. BACKGROUND

[0002] When the user closes the faucet during the shower process, the water in the heat exchanger of the gas water heater stops flowing. Since the heat exchanger has a certain thermal inertia, heat will continue to be conducted to the water inside the heat exchanger, causing the temperature of this part of the water to be too high. When the user opens the faucet again, he will feel uncomfortable due to the high-temperature water. The usual solution is to connect a bypass device between the water inlet pipe and the water outlet pipe of the water heater, so that part of the cold water does not flow through the heat exchanger, but directly flows to the water outlet pipe of the water heater through the bypass device, and uses this part of the cold water to neutralize the hot water caused by the temperature rise of the stopped water.

[0003] For example, Chinese patent CN216114719U discloses a joint and a gas rapid water heater for reducing the temperature rise of stopped water, which realizes the communication between the water inlet pipe and the cold water pipe of the water heater through the water inlet joint, the connecting channel and the water outlet joint, and adjusts the bypass flow in the bypass device by setting a sealing valve rod, a first spring and a fixed base in the connecting channel, and a regulating valve core in the water inlet joint. However, the adjustment of the bypass flow needs to be achieved by rotating the regulating valve core with external force, and cannot be adjusted by water flow, which has poor adaptability. SUMMARY

[0004] The technical problem to be solved by the present application is to overcome the defect that the bypass device of the gas water heater in the prior art cannot rely on the internal water inflow to adjust the bypass flow, and to provide a bypass valve and a gas water heater.

[0005] The present application solves the above technical problems by the following technical solutions:

[0006] A bypass valve, comprising a valve body, the valve body being provided with a water inlet channel and a water outlet channel, a first bypass passage and a second bypass passage being in communication between the water inlet channel and the water outlet channel, the bypass valve further comprising a first valve core, a second valve core, a driving member, a first return member, a second return member, a first transmission part and a second transmission part;

[0007] The first valve core is arranged in the first bypass passage, the first valve core being used to move towards the direction close to the water outlet channel under the action of water flow, the first return member being used to apply an action force to the first valve core to move the first valve core away from the water outlet channel, the driving member being connected with the first valve core, and the driving member being used to drive the first valve core to rotate around the axis of the first bypass passage;

[0008] The valve body is provided with a transmission channel, which is communicated with the first bypass passage and the second bypass passage, the second valve core is arranged in the transmission channel and can rotate around the axial direction of the transmission channel, the second valve core is provided with a communication channel, which penetrates the outer peripheral wall of the second valve core along the radial direction of the second valve core and is arranged along the circumferential direction of the second valve core, and the second valve core is provided with a blocking part;

[0009] The second valve core can rotate between a first position and a second position in the second bypass passage, the opening degree of the second bypass passage gradually decreases when the second valve core rotates from the first position to the second position, the opening degree of the second bypass passage gradually increases when the second valve core rotates from the second position to the first position, the communication area of the communication channel and the second bypass passage is the largest in the first position, and the blocking part at least partially blocks the second bypass passage in the second position.

[0010] The first valve core is provided with the first transmission part on the side facing the water outlet passage, the second valve core is provided with the second transmission part on the side facing the first bypass passage, the first transmission part is used for acting on the second transmission part and driving the second transmission part to rotate around the axial direction of the transmission channel when the first valve core rotates around the axial direction of the first bypass passage, and the second reset member is connected with the second valve core and is used for driving the second valve core to rotate from the second position to the first position.

[0011] In the present scheme, the valve body of the bypass valve is provided with a first bypass passage and a second bypass passage, the first bypass passage has a stable bypass flow rate, which can ensure the requirement of minimum bypass flow rate, and the bypass flow rate of the second bypass passage is adjustable, which has strong applicability; when water flow flows into the water inlet channel, part of the water flow flows into the water outlet channel through the first bypass passage, and part of the water flow flows into the water outlet channel through the second bypass passage; under the action of water flow pressure, the first valve core moves towards the direction close to the water outlet channel, at the same time, the driving member can drive the first valve core to rotate around the axis of the first bypass passage under the action of water flow, and the first transmission part connected to the first valve core acts on the second valve core and drives the second valve core to rotate around the axis of the transmission channel in the process of rotating with the first valve core, so that the second valve core rotates from the first position to the second position; when the second valve core is located at the first position, the communication passage of the second valve core has a large communication area with the second bypass passage, that is, the opening degree of the second bypass passage is large, when the second valve core rotates to the second position, the communication area of the communication passage of the second valve core with the second bypass passage gradually decreases, and the blocking area of the blocking part of the second valve core to the second bypass passage gradually increases, that is, the opening degree of the second bypass passage gradually decreases; when the water inflow of the water inlet channel decreases, under the action of the first return member, the first valve core moves away from the water outlet channel, and under the action of the second return member, the second valve core rotates from the second position to the first position, and the opening degree of the second bypass passage changes from small to large; through the above structure, the bypass valve can automatically adjust the bypass flow rate according to the size change of the water inflow.

[0012] Preferably, when the second valve core is located at the first position, the communication passage is in complete communication with the second bypass passage;

[0013] When the second valve core is located at the second position, the blocking part completely blocks the second bypass passage.

[0014] In the present scheme, when the second valve core is located at the first position, the communication passage is in complete communication with the second bypass passage, at this time, the opening degree of the second bypass passage reaches the maximum value; when the second valve core is located at the second position, the blocking part completely blocks the second bypass passage, at this time, the opening degree of the second bypass passage is zero, that is, the upper limit and lower limit of the opening degree of the second bypass passage are realized.

[0015] Preferably, the first transmission part extends along the axis of the first bypass passage, the second transmission part extends along the axis of the transmission channel, and when the first transmission part rotates around the axis of the first bypass passage with the first valve core, the outer peripheral wall of the first transmission part can abut against the outer peripheral wall of the second transmission part and drive the second transmission part to rotate around the axis of the transmission channel.

[0016] In the scheme, the first transmission part can rotate with the first valve core around the axis of the first bypass passage while the first valve core moves towards the water outlet passage, the first transmission part abuts against the second transmission part during the movement and rotation, and pushes the second transmission part to rotate around the axis of the transmission passage, so that the second valve core can rotate from the first position to the second position, and the opening degree of the second bypass passage changes from large to small, thereby adjusting the total bypass flow of the bypass valve.

[0017] Preferably, one end of the first transmission part close to the first valve core is fixedly connected with the first valve core, and the other end of the first transmission part can rotate towards the opposite direction of the rotation direction of the first valve core.

[0018] In the scheme, one end of the first transmission part is fixedly connected with the first valve core, which ensures the firmness of the connection, and avoids the failure of the connection of the first transmission part when it abuts against the second transmission part; the other end of the first transmission part can rotate towards the opposite direction of the rotation direction of the first valve core, so that the impact between the first transmission part and the second transmission part is buffered when they abut against each other, and rigid collision and damage of the components are avoided.

[0019] Preferably, the outer peripheral wall of the first valve core is provided with a first engaging part, and the outer peripheral wall of the second valve core is provided with a second engaging part, the second engaging part is located in the first bypass passage, and the first engaging part is used to engage with the second engaging part to drive the second valve core to rotate around the axis of the transmission passage after the first transmission part pushes the second transmission part to rotate.

[0020] In the scheme, when the first transmission part pushes the second transmission part to rotate, the first engaging part immediately engages with the second engaging part, and drives the second valve core to further rotate, which ensures that the second valve core is rotated to the right position, and meanwhile, the engagement of the first engaging part and the second engaging part can prevent the second valve core from rotating from the second position to the first position under the action of the second return member, and only when the engagement of the first engaging part and the second engaging part ends, the second valve core starts to rotate from the second position to the first position.

[0021] Preferably, the second valve core is provided with a plurality of second transmission parts and a plurality of second engaging parts, the plurality of second transmission parts are uniformly and spacedly arranged along the circumference of the second valve core, and the plurality of second engaging parts are uniformly and spacedly arranged along the outer peripheral wall of the second valve core.

[0022] In the scheme, the plurality of second transmission parts facilitate the abutment of the first transmission part with any one of the second transmission parts, and further facilitate the rotation of the second valve core; and the plurality of second engaging parts facilitate the engagement of the first engaging part with any one of the second engaging parts, and further facilitate the rotation of the second valve core to the second position, that is, the effectiveness of the transmission between the first valve core and the second valve core is improved.

[0023] Preferably, a sliding groove is arranged on the side wall of the transmission channel away from the first bypass channel, the sliding groove extends along the circumference of the transmission channel, and the second valve core is provided with a limiting block on the side facing the sliding groove, and the limiting block is used for sliding in the sliding groove.

[0024] The sliding groove has a first limiting end and a second limiting end, when the limiting block abuts against the first limiting end, the second valve core is located at the first position, and when the limiting block abuts against the second limiting end, the second valve core is located at the second position.

[0025] In the scheme, the sliding groove extends along the circumference of the transmission channel, which facilitates the sliding of the limiting block in the sliding groove when the second valve core rotates around the axis of the transmission channel, and further limits the rotating movement of the second valve core, when the second valve core is located at the first position, the limiting block abuts against the first limiting end of the sliding groove, and the opening degree of the second bypass channel is maximum, when the second valve core gradually rotates from the first position to the second position, the limiting block gradually rotates from the first limiting end to the second limiting end of the sliding groove and abuts against the second limiting end, and at this time, the opening degree of the second bypass channel is minimum, and through the cooperation of the sliding block and the sliding groove, the limit value of the opening degree of the second bypass channel is controlled.

[0026] Preferably, the second valve core is provided with an annular mounting groove, the mounting groove extends along the circumference of the second valve core, and the second reset member is mounted in the mounting groove, and the second reset member is a volute spring.

[0027] In the scheme, the mounting groove of the second valve core extends along the circumference thereof, and the volute spring is mounted in the mounting groove, so that in the process of rotating the second valve core from the first position to the second position, the volute spring is elastically deformed by bending under the torque of the second valve core, so that the volute spring is twisted in the direction opposite to the rotating direction of the second valve core, when the first transmission part no longer abuts against the second transmission part and the first engagement part and the second engagement part are disengaged, the second valve core rotates from the second position to the first position under the restoring force of the volute spring, and the opening degree of the second bypass channel changes from small to large.

[0028] Preferably, the first bypass channel is provided with a limiting portion near one end of the water outlet channel, the limiting portion is fixedly connected with the valve body, and the two ends of the first reset member abut against the limiting portion and the first valve core respectively.

[0029] In the scheme, the limiting portion is arranged to limit the first reset member, so that the first reset member is limited between the limiting portion and the first valve core, and the stability of the installation of the first reset member is ensured.

[0030] Preferably, the first valve core comprises a bottom wall and a ring-shaped side wall, the bottom wall is connected to one end of the side wall away from the water outlet channel, two ends of the first reset member abut against the bottom wall and the limiting portion respectively, and the first transmission portion is connected to one end of the side wall away from the bottom wall.

[0031] In the scheme, the bottom wall is used to abut against one end of the first reset member, facilitating compression of the first reset member when the first reset member moves towards the water outlet channel; the ring-shaped side wall is conducive to maintaining the stability of the first valve core during movement; and the first transmission portion is connected to one end of the side wall away from the bottom wall, so that the distance between the first transmission portion and the second transmission portion is shorter, facilitating abutment of the first transmission portion against the second transmission portion during movement, so as to push the second valve core to rotate.

[0032] Preferably, the drive member comprises an impeller and an impeller shaft, the impeller is located in the water outlet channel, the impeller is connected to the impeller shaft and is used to drive the impeller shaft to rotate around the axis of the first bypass passage, and the bottom wall is provided with a transmission sleeve, and the impeller shaft penetrates through the transmission sleeve.

[0033] In the scheme, when water flow passes through the water outlet channel, the impeller rotates under the action of the water flow and drives the impeller shaft to rotate, and since the impeller shaft is connected to the transmission sleeve of the first valve core, the first valve core can be driven to rotate around the axis of the first bypass passage, and the driving mode of the rotation of the first valve core is simple and convenient, without the need for other external driving force, and water flow power can be used to achieve the rotation.

[0034] Preferably, one end of the first bypass passage communicating with the water inlet channel is provided with a step portion, the step portion extends inwardly along the radial direction of the first bypass passage from the inner circumferential wall of the first bypass passage, and when the first valve core is located at the initial position, the first valve core abuts against the step portion.

[0035] In the scheme, the step portion can limit the first valve core, and the first valve core is limited in the first bypass passage by the limiting portion, the first reset member and the step portion, so as to ensure movement of the first valve core in the first bypass passage.

[0036] A gas water heater comprises a water inlet pipe, a heat exchanger and a water outlet pipe, and further comprises the bypass valve described above.

[0037] The water inlet end and the water outlet end of the water inlet channel of the bypass valve are respectively connected to the water inlet pipe and the water inlet end of the heat exchanger.

[0038] The water inlet end and the water outlet end of the water outlet channel of the bypass valve are respectively connected to the water outlet end of the heat exchanger and the water outlet pipe.

[0039] In the scheme, after the user turns off the hot water after using the gas water heater, because the heat exchanger has certain thermal inertia, heat will continue to conduct to the water inside the heat exchanger, causing the temperature of this part of water to be too high, and flowing into the water outlet pipe. The gas water heater sets the bypass valve, so that the cold water in the water inlet pipe flows into the hot water pipe through the bypass valve, and the hot water with too high temperature in the hot water pipe can be neutralized, avoiding the user from feeling uncomfortable or even being scalded when turning on the hot water again, and solving the problem of water temperature rise. At the same time, when no cold water is introduced into the bypass valve, the second valve core is located at the first position, at this time, the opening degree of the second bypass path is maximum, the total bypass flow of the bypass valve is maximum, and the flow of the cold water flowing out to the water outlet pipe is maximum, which can better neutralize the hot water with too high temperature in the water outlet pipe, solve the problem of water temperature rise, and then the water temperature in the water outlet pipe is no longer too high, and the required amount of cold water for neutralization is gradually reduced. At this time, the bypass valve rotates with the second valve core from the first position to the second position, the opening degree of the second bypass path gradually decreases, the total bypass flow of the bypass valve gradually decreases, and the amount of cold water flowing out to the water outlet pipe gradually decreases, which is adapted to the amount of cold water required for neutralizing hot water, avoids excessive bypass flow causing other problems, such as excessive cold water not being heated and directly flowing out, too small water flow flowing through the heat exchanger causing water boiling, etc. When stopping using water, the elastic member can push the movable valve core away from the limiting part to move and reset, to facilitate subsequent reuse.

[0040] The positive progress effect of the present application is that:

[0041] In the present application, the valve body of the bypass valve is provided with a first bypass passage and a second bypass passage, the first bypass passage has a stable bypass flow rate, and the second bypass passage has an adjustable bypass flow rate, and the adaptability is stronger; when the water flow flows into the water inlet channel, part of the water flow flows into the water outlet channel through the first bypass passage, and part of the water flow flows into the water outlet channel through the second bypass passage; under the action of the water flow pressure, the first valve core moves towards the direction close to the water outlet channel, and the driving member can drive the first valve core to rotate around the axis of the first bypass passage under the action of the water flow, and the first transmission part connected to the first valve core acts on the second valve core and drives the second valve core to rotate around the axis of the transmission channel in the process of rotating with the first valve core, so that the second valve core rotates from the first position to the second position; when the second valve core is located at the first position, the communication passage of the second valve core has a larger communication area with the second bypass passage, that is, the opening degree of the second bypass passage is larger, and when the second valve core rotates to the second position, the communication area of the communication passage of the second valve core with the second bypass passage gradually decreases, and the blocking area of the second valve core to the second bypass passage gradually increases, that is, the opening degree of the second bypass passage gradually decreases; when the water inflow of the water inlet channel decreases, the first valve core moves away from the water outlet channel under the action of the first reset member, and the second valve core rotates from the second position to the first position under the action of the second reset member, and the opening degree of the second bypass passage changes from small to large; through the above structure, the bypass valve can automatically adjust the bypass flow rate according to the size change of the water inflow. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 It is a three-dimensional structure schematic diagram of the gas water heater of an embodiment of the present application.

[0043] Figure 2 It is a three-dimensional structure schematic diagram of the bypass valve of an embodiment of the present application.

[0044] Figure 3 It is a cross-sectional structure schematic diagram of the bypass valve of an embodiment of the present application (the second valve core is located at the first position).

[0045] Figure 4 It is a cross-sectional structure schematic diagram of the bypass valve of an embodiment of the present application (the second valve core is located at the second position).

[0046] Figure 5 It is a cross-sectional structure schematic diagram of the first valve core and the second valve core of the bypass valve of an embodiment of the present application.

[0047] Figure 6 It is a cross-sectional structure schematic diagram of the sliding groove of the bypass valve of an embodiment of the present application.

[0048] Figure 7 It is a three-dimensional structure schematic diagram of the first valve core, the second valve core and the driving member of the bypass valve of an embodiment of the present application (the first valve core is located at the initial position).

[0049] Figure 8 Schematic perspective view of the first spool, the second spool and the driving member of the bypass valve according to an embodiment of the present application (the first spool is engaged with the second spool).

[0050] Figure 9 Schematic perspective view of the first spool and the second spool of the bypass valve according to an embodiment of the present application (the first transmission portion is not abutted against the second transmission portion).

[0051] Figure 10 Schematic perspective view of the first spool and the second spool of the bypass valve according to an embodiment of the present application (the first transmission portion is abutted against the second transmission portion).

[0052] Legend of reference numerals:

[0053] Gas water heater 200

[0054] Water inlet pipe 201

[0055] Heat exchanger 202

[0056] Water outlet pipe 203

[0057] Smoke hood 204

[0058] Combustion chamber 205

[0059] Gas distribution system 206

[0060] Fan 207

[0061] Electronic controller 208

[0062] Bypass valve 100

[0063] Valve body 1

[0064] Water inlet passage 11

[0065] First water inlet port 111

[0066] First water outlet port 112

[0067] Water outlet passage 12

[0068] Second water inlet port 121

[0069] Second water outlet port 122

[0070] First bypass passage 13

[0071] Second bypass passage 14

[0072] Transmission passage 15

[0073] Sliding groove 16

[0074] Step portion 17

[0075] First valve core 2

[0076] First engagement portion 21

[0077] Bottom wall 22

[0078] First water hole 221

[0079] Side wall 23

[0080] Transmission sleeve 24

[0081] Second valve core 3

[0082] Communication channel 31

[0083] Blocking portion 32

[0084] Second engagement portion 33

[0085] Limiting block 34

[0086] Mounting groove 35

[0087] Round plate 36

[0088] Round ring 37

[0089] Driving member 4

[0090] Impeller 41

[0091] Impeller shaft 42

[0092] First reset member 5

[0093] Second reset member 6

[0094] First transmission portion 7

[0095] Second transmission portion 8

[0096] Limiting portion 9

[0097] Second water hole 91 DETAILED DESCRIPTION

[0098] The present application will be more fully understood from the following detailed description taken in conjunction with the accompanying drawings, given by way of illustration only, and thus, are not intended to limit the present application.

[0099] As Figure 1As shown, the embodiment provides a gas water heater 200, which comprises a water inlet pipe 201, a heat exchanger 202 and a water outlet pipe 203. The gas water heater 200 further comprises a bypass valve 100, which is provided with a water inlet channel 11 and a water outlet channel 12. The water inlet end (i.e. a first water inlet 111) and the water outlet end (i.e. a first water outlet 112) of the water inlet channel 11 are respectively connected to the water inlet pipe 201 and the water inlet end of the heat exchanger 202. The water inlet end (i.e. a second water inlet 121) and the water outlet end (i.e. a second water outlet 122) of the water outlet channel 12 are respectively connected to the water outlet end of the heat exchanger 202 and the water outlet pipe 203. When the user turns off the hot water after using the gas water heater 200, due to the thermal inertia of the heat exchanger 202, heat will continue to be conducted to the water inside the heat exchanger 202, resulting in the temperature of this part of water being too high, and the water flowing into the water outlet pipe 203. The gas water heater 200 is provided with the bypass valve 100, so that the cold water in the water inlet pipe 201 flows into the hot water pipe through the bypass valve 100, and the hot water with too high temperature in the hot water pipe is neutralized, avoiding the user from feeling uncomfortable or even being scalded when the user opens the hot water again, and solving the problem of water temperature rising when the water is stopped.

[0100] Specifically, the gas water heater 200 further comprises a gas distribution system 206, a combustion chamber 205 and a fume hood 204. The gas distribution system 206 provides a gas source for the combustion of gas in the combustion chamber 205. The fume hood 204 is used to collect waste gas generated by the combustion of gas and discharge. The gas water heater 200 further comprises a fan 207, which is used to introduce air flow into the combustion chamber 205 to improve the combustion efficiency of gas. In addition, the gas water heater 200 further comprises an electric controller 208, which is used to control the gas circuit and water circuit of the gas water heater 200.

[0101] As Figures 2 to 10As shown, the bypass valve 100 comprises a valve body 1, the valve body 1 is provided with an inlet water channel 11 and an outlet water channel 12, the first bypass passage 13 and the second bypass passage 14 are communicated between the inlet water channel 11 and the outlet water channel 12, the bypass valve 100 further comprises a first valve core 2, a second valve core 3, a driving member 4, a first reset member 5, a second reset member 6, a first transmission part 7 and a second transmission part 8; the first valve core 2 is arranged in the first bypass passage 13, the first valve core 2 is used to move towards the direction close to the outlet water channel 12 under the action of water flow, the first reset member 5 is used to apply an action force to the first valve core 2 to move the first valve core 2 away from the outlet water channel 12, the driving member 4 is connected with the first valve core 2, and the driving member 4 is used to drive the first valve core 2 to rotate around the axial direction of the first bypass passage 13; the valve body 1 is provided with a transmission channel 15, the transmission channel 15 is communicated between the first bypass passage 13 and the second bypass passage 14, the second valve core 3 is arranged in the transmission channel 15 and can rotate around the axial direction of the transmission channel 15, the second valve core 3 is provided with a communication channel 31, the communication channel 31 penetrates the outer peripheral wall of the second valve core 3 along the radial direction of the second valve core 3, and along the circumferential direction of the second valve core 3, the second valve core 3 is provided with a blocking part 32; the second valve core 3 can rotate between a first position (such as the position relationship shown in Figure 3 ) and a second position (such as the position relationship shown in Figure 4 ), during the process that the second valve core 3 rotates from the first position to the second position, the opening degree of the second bypass passage 14 gradually decreases, during the process that the second valve core 3 rotates from the second position to the first position, the opening degree of the second bypass passage 14 gradually increases, in the first position, the communication area of the communication channel 31 and the second bypass passage 14 is maximum, in the second position, the blocking part 32 at least partially blocks the second bypass passage 14; the side of the first valve core 2 towards the outlet water channel 12 is provided with the first transmission part 7, the side of the second valve core 3 towards the first bypass passage 13 is provided with the second transmission part 8, the first transmission part 7 is used to act on the second transmission part 8 and push the second transmission part 8 to rotate around the axial direction of the transmission channel 15 when the first valve core 2 rotates around the axial direction of the first bypass passage 13, the second reset member 6 is connected with the second valve core 3, and the second reset member 6 is used to drive the second valve core 3 to rotate from the second position to the first position.

[0102] The valve body 1 of the bypass valve 100 is provided with a first bypass passage 13 and a second bypass passage 14, the first bypass passage 13 has a stable bypass flow rate, which can ensure the requirement of the minimum bypass flow rate, and the bypass flow rate of the second bypass passage 14 is adjustable, which has strong applicability; when the water flow flows into the water inlet channel 11, part of the water flow flows into the water outlet channel 12 through the first bypass passage 13, and part of the water flow flows into the water outlet channel 12 through the second bypass passage 14; under the action of the water flow pressure, the first valve core 2 moves towards the direction close to the water outlet channel 12, at the same time, the driving part 4 can drive the first valve core 2 to rotate around the axial direction of the first bypass passage 13 under the action of the water flow, and the first transmission part 7 connected to the first valve core 2 acts on the second valve core 3 in the process of rotating with the first valve core 2 and drives the second valve core 3 to rotate around the axial direction of the transmission channel 15, so that the second valve core 3 rotates from the first position to the second position; when the second valve core 3 is located at the first position, the communication passage 31 of the second valve core 3 has a large communication area with the second bypass passage 14, that is, the opening degree of the second bypass passage 14 is large, when the second valve core 3 rotates to the second position, the communication area of the communication passage 31 of the second valve core 3 with the second bypass passage 14 gradually decreases, and the blocking area of the blocking part 32 of the second valve core 3 to the second bypass passage 14 gradually increases, that is, the opening degree of the second bypass passage 14 gradually decreases; when the water inflow of the water inlet channel 11 decreases, under the action of the first reset part 5, the first valve core 2 moves towards the direction away from the water outlet channel 12, under the action of the second reset part 6, the second valve core 3 rotates from the second position to the first position, and the opening degree of the second bypass passage 14 changes from small to large; through the above structure, the bypass valve 100 can automatically adjust the bypass flow rate according to the size change of the water inflow.

[0103] Specifically, in the present embodiment, the second valve core 3 includes a circular plate 36 and a circular ring 37, the circular plate 36 is located at one end of the transmission channel 15 close to the first bypass passage 13, the circular ring 37 is located at one end of the transmission channel 15 away from the first bypass passage 13, the blocking part 32 is arranged along the outer peripheral wall of the circular plate 36 and the circular ring 37 and connects the circular plate 36 and the circular ring 37, and the circular plate 36, the circular ring 37 and the blocking part together enclose the communication passage 31. In other optional embodiments, the second valve core 3 can also be provided in a cylindrical shape, and the communication passage 31 is arranged through the outer peripheral wall of the second valve core 3 in the radial direction of the second valve core 3. In summary, as long as the second valve core 3 can communicate the entire second bypass passage 14 when in the first position, so that the water flow can flow from the water inlet channel 11 to the water outlet channel 12 through the second bypass passage 14.

[0104] In the embodiment, when the second valve core 3 is located at the first position, the communication passage 31 is in complete communication with the second bypass passage 14; when the second valve core 3 is located at the second position, the blocking part 32 completely blocks the second bypass passage 14. When the second valve core 3 is located at the first position, the communication passage 31 is in complete communication with the second bypass passage 14, at this time, the opening degree of the second bypass passage 14 reaches the maximum value; when the second valve core 3 is located at the second position, the blocking part 32 completely blocks the second bypass passage 14, at this time, the opening degree of the second bypass passage 14 is zero, that is, the upper limit and the lower limit of the opening degree of the second bypass passage 14 are controlled.

[0105] In the embodiment, the first transmission part 7 extends along the axial direction of the first bypass passage 13, and the second transmission part 8 extends along the axial direction of the transmission passage 15. When the first transmission part 7 rotates along the axial direction of the first bypass passage 13 with the first valve core 2, the outer peripheral wall of the first transmission part 7 can abut against the outer peripheral wall of the second transmission part 8 and push the second transmission part 8 to rotate along the axial direction of the transmission passage 15. The first transmission part 7 can rotate along the axial direction of the first bypass passage 13 with the first valve core 2 while moving towards the water outlet passage 12, and the first transmission part 7 abuts against the second transmission part 8 and pushes the second transmission part 8 to rotate along the axial direction of the transmission passage 15 in the process of moving and rotating, so that the second valve core 3 can rotate from the first position to the second position, the opening degree of the second bypass passage 14 changes from large to small, and the total bypass flow of the bypass valve 100 is adjusted. Specifically, in the embodiment, the first transmission part 7 is in a sheet structure, and the second transmission part 8 is in a rod structure. The sheet structure of the first transmission part 7 is beneficial to increase the pushing area of the second transmission part 8 and ensure the effectiveness of transmission.

[0106] In the embodiment, one end of the first transmission part 7 close to the first valve core 2 is fixedly connected with the first valve core 2, and the other end of the first transmission part 7 away from the first valve core 2 can rotate towards the opposite direction of the rotation direction of the first valve core 2. One end of the first transmission part 7 is fixedly connected with the first valve core 2, so as to ensure the firmness of the connection, and avoid the failure of the connection of the first transmission part 7 when abutting against the second transmission part 8. The other end of the first transmission part 7 can rotate towards the opposite direction of the rotation direction of the first valve core 2, so that when the first transmission part 7 abuts against the second transmission part 8, the impact between the two is buffered, and rigid collision and damage of the components are avoided. Specifically, the first transmission part 7 can be made of a material with a certain elasticity, so that when the first transmission part 7 abuts against the second transmission part, the first transmission part 7 can rotate towards the opposite direction of the rotation direction of the first valve core 2, so as to reduce the impact when the two abut against each other.

[0107] In the embodiment, the outer peripheral wall of the first valve core 2 is provided with a first engaging portion 21, and the outer peripheral wall of the second valve core 3 is provided with a second engaging portion 33, which is located in the first bypass passage 13. The first engaging portion 21 is used to engage with the second engaging portion 33 to drive the second valve core 3 to rotate around the axis of the transmission passage 15 after the first transmission portion 7 drives the second transmission portion 8 to rotate. After the first transmission portion 7 drives the second transmission portion 8 to rotate, the first engaging portion 21 immediately engages with the second engaging portion 33 to further drive the second valve core 3 to rotate, so as to ensure that the second valve core 3 is rotated to the position. At the same time, the engagement between the first engaging portion 21 and the second engaging portion 33 can prevent the second valve core 3 from rotating from the second position to the first position under the action of the second return member 6. After the first engaging portion 21 and the second engaging portion 33 end the engagement state, the second valve core 3 starts to rotate from the second position to the first position. Specifically, in the embodiment, the first engaging portion 21 and the second engaging portion 33 each include two teeth. The engagement between the teeth is conducive to improving the effectiveness of the transmission between the first valve core 2 and the second valve core 3. At the same time, the plurality of second transmission portions 8 and the plurality of second engaging portions 33 are arranged to facilitate the first transmission portion 7 to successively drive different second transmission portions 8 during rotation, so as to ensure that the first engaging portion 21 engages with different second engaging portions 33, thereby ensuring that the second valve core 3 has sufficient driving force and is continuously driven until it rotates from the first position to the second position. In other alternative embodiments, the number of teeth is not limited to the embodiment, and can be selected according to the number of teeth required by the rotation path of the second valve core 3.

[0108] In the embodiment, the second valve core 3 is provided with a plurality of second transmission portions 8 and a plurality of second engaging portions 33. The plurality of second transmission portions 8 are uniformly and spacedly arranged along the circumference of the second valve core 3, and the plurality of second engaging portions 33 are uniformly and spacedly arranged along the outer peripheral wall of the second valve core 3. The plurality of second transmission portions 8 are arranged to facilitate the first transmission portion 7 to abut against any one of the second transmission portions 8, thereby driving the second valve core 3 to rotate. The plurality of second engaging portions 33 are arranged to facilitate the first engaging portion 21 to engage with any one of the second engaging portions 33, thereby driving the second valve core 3 to rotate to the second position, i.e., improving the effectiveness of the transmission between the first valve core 2 and the second valve core 3.

[0109] In the embodiment, the transmission channel 15 is provided with a sliding groove 16 on the side wall 23 away from the first bypass channel 13, the sliding groove 16 extends along the circumference of the transmission channel 15, the second valve core 3 is provided with a limiting block 34 on the side facing the sliding groove 16, and the limiting block 34 is used for sliding in the sliding groove 16; the sliding groove 16 has a first limiting end and a second limiting end, when the limiting block 34 abuts against the first limiting end, the second valve core 3 is located at the first position, and when the limiting block 34 abuts against the second limiting end, the second valve core 3 is located at the second position. The sliding groove 16 extends along the circumference of the transmission channel 15, which facilitates the sliding of the limiting block 34 in the sliding groove 16 when the second valve core 3 rotates around the axis of the transmission channel 15, and further limits the rotating movement of the second valve core 3, when the second valve core 3 is located at the first position, the limiting block 34 abuts against the first limiting end of the sliding groove 16, and the opening degree of the second bypass channel 14 is maximum, when the second valve core 3 gradually rotates from the first position to the second position, the limiting block 34 gradually rotates from the first limiting end to the second limiting end of the sliding groove 16 and abuts against the second limiting end, at this time, the opening degree of the second bypass channel 14 is minimum, and the cooperation of the sliding block and the sliding groove 16 facilitates the control of the limit value of the opening degree of the second bypass channel 14.

[0110] In the embodiment, the second valve core 3 is provided with an annular mounting groove 35, the mounting groove 35 extends along the circumference of the second valve core 3, and the second reset member 6 is mounted in the mounting groove 35, and the second reset member 6 is a volute spring. The mounting groove 35 of the second valve core 3 extends along the circumference thereof, and the volute spring is mounted in the mounting groove 35, so that in the process of rotating the second valve core 3 from the first position to the second position, the volute spring is elastically deformed by bending under the torque of the second valve core 3, so that the volute spring generates a torsion in the direction opposite to the rotating direction of the second valve core 3, when the first transmission part 7 no longer abuts against the second transmission part 8 and the first engagement part 21 and the second engagement part 33 are disengaged, the second valve core 3 rotates from the second position to the first position under the restoring force of the volute spring, and the opening degree of the second bypass channel 14 changes from small to large. Specifically, in the embodiment, the first reset member 5 adopts a spring, which is simple in structure and convenient to install.

[0111] In the embodiment, the first bypass channel 13 is provided with a limiting part 9 near one end of the water outlet channel 12, the limiting part 9 is fixedly connected with the valve body 1, and the two ends of the first reset member 5 abut against the limiting part 9 and the first valve core 2 respectively. The limiting part 9 facilitates the limiting of the first reset member 5, so that the first reset member 5 is limited between the limiting part 9 and the first valve core 2, and the stability of the installation of the first reset member 5 is ensured.

[0112] Specifically, in the embodiment, the limiting portion 9 is a circular plate with a plurality of through holes (i.e., the second water passing holes 91), the outer diameter of the limiting portion 9 is matched with the inner diameter of the first bypass passage 13, and the limiting portion 9 is fixedly connected to one end of the first bypass passage 13 that is communicated with the water outlet passage 12 and is located inside the first bypass passage 13.

[0113] In the embodiment, the first valve core 2 includes a bottom wall 22 and an annular side wall 23, the bottom wall 22 is connected to one end of the side wall 23 away from the water outlet passage 12, the two ends of the first reset member 5 are respectively abutted against the bottom wall 22 and the limiting portion 9, and the first transmission portion 7 is connected to one end of the side wall 23 away from the bottom wall 22. The bottom wall 22 is used to abut against one end of the first reset member 5, so as to facilitate compression of the first reset member 5 when the first reset member 5 moves towards the water outlet passage 12; the annular side wall 23 is beneficial to the stability of the first valve core 2 during movement; and the first transmission portion 7 is connected to one end of the side wall 23 away from the bottom wall 22, so that the distance between the first transmission portion 7 and the second transmission portion 8 is shorter, and the first transmission portion 7 is facilitated to abut against the second transmission portion 8 during movement, so as to push the second valve core 3 to rotate. Specifically, in the embodiment, the side wall 23, the bottom wall 22 and the transmission sleeve 24 are integrally formed, which is beneficial to improve the assembly efficiency of the bypass valve 100.

[0114] In the embodiment, the driving member 4 includes an impeller 41 and an impeller shaft 42, the impeller 41 is located inside the water outlet passage 12, the impeller 41 is connected to the impeller shaft 42 and is used to drive the impeller shaft 42 to rotate around the axial direction of the first bypass passage 13, the bottom wall 22 is provided with the transmission sleeve 24, and the impeller shaft 42 penetrates through the transmission sleeve 24. When there is water flow in the water outlet passage 12, the impeller 41 rotates under the action of the water flow and drives the impeller shaft 42 to rotate. Since the impeller shaft 42 is connected to the transmission sleeve 24 of the first valve core 2, the first valve core 2 can be driven to rotate around the axial direction of the first bypass passage 13. The driving mode of the rotation of the first valve core 2 is simple and convenient, and does not need to rely on other external driving force, but can be realized by using water flow power.

[0115] Specifically, in the embodiment, the bottom wall 22 is provided with a plurality of first water passing holes 221, and the plurality of first water passing holes 221 are uniformly arranged along the circumferential direction of the bottom wall 22; and the limiting portion 9 is provided with a plurality of second water passing holes 91, and the plurality of second water passing holes 91 are uniformly arranged along the circumferential direction of the limiting portion 9. The first water passing holes 221 of the bottom wall 22 are arranged to facilitate the water in the water inlet passage 11 to flow into the first bypass passage 13 uniformly, and to make the pushing force of the water flow on the first valve core 2 more uniform; and the second water passing holes 91 of the limiting portion 9 are arranged to make the water flow in the first bypass passage 13 flow out into the water outlet passage 12 more uniformly.

[0116] In the embodiment, the first bypass passage 13 is provided with a stepped portion 17 at one end communicating with the water inlet channel 11. The stepped portion 17 extends inwardly along the radial direction of the first bypass passage 13 from the inner wall of the first bypass passage 13. When the first valve core 2 is located at the initial position, the first valve core 2 abuts against the stepped portion 17, and the first water passage hole 221 communicates with the water inlet channel 11. The stepped portion 17 can position the first valve core 2. The first valve core 2 is positioned in the first bypass passage 13 by the limiting portion 9, the first reset member 5 and the stepped portion 17, so as to ensure the movement of the first valve core 2 in the first bypass passage 13, and ensure that the first water passage hole 221 communicates with the water inlet channel 11.

[0117] Specifically, the bypass flow of the bypass valve 100 is adjusted to match the hot water temperature in the water outlet pipe 203 of the gas water heater 200. The principle is as follows: when no cold water is introduced into the bypass valve 100, the second valve core 3 is located at the first position. At this time, the opening degree of the second bypass passage 14 is maximum, the total bypass flow of the bypass valve 100 is maximum, and the cold water flow out of the water outlet pipe 203 is maximum, which can better neutralize the hot water with too high temperature in the water outlet pipe 203, and solve the problem of water temperature rising. After that, the water temperature in the water outlet pipe 203 is no longer too high, and the required amount of cold water for neutralization also gradually decreases. At this time, the bypass valve 100 is rotated with the second valve core 3 from the first position to the second position, the opening degree of the second bypass passage 14 gradually decreases, the total bypass flow of the bypass valve 100 gradually decreases, and the amount of cold water flowing out of the water outlet pipe 203 gradually decreases, which is matched with the amount of cold water required for neutralizing hot water, avoiding other problems caused by excessive bypass flow, such as excessive cold water not being heated and directly flowing out, too small water flow through the heat exchanger 202 causing water boiling, etc. When the water use is stopped, the elastic member can push the moving valve core away from the limiting portion 9 to move and reset, so as to facilitate subsequent reuse.

[0118] Although the specific embodiments of the present application are described above, those skilled in the art should understand that this is only an example, and the protection scope of the present application 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 application, and these changes and modifications all fall within the protection scope of the present application.

Claims

1. A bypass valve comprising a valve body, characterized in that The valve body is provided with a water inlet channel and a water outlet channel, the water inlet channel and the water outlet channel are communicated with a first bypass channel and a second bypass channel, the bypass valve further comprises a first valve core, a second valve core, a driving member, a first reset member, a second reset member, a first transmission part and a second transmission part; The first valve core is arranged in the first bypass channel, the first valve core is used to move towards the direction close to the water outlet channel under the action of water flow, the first reset member is used to apply an action force to the first valve core to move the first valve core away from the water outlet channel, the driving member is connected with the first valve core, and the driving member is used to drive the first valve core to rotate around the axis of the first bypass channel; The valve body is provided with a transmission channel, the transmission channel is communicated with the first bypass channel and the second bypass channel, the second valve core is arranged in the transmission channel and can rotate around the axis of the transmission channel, the second valve core is provided with a communication channel, the communication channel penetrates through the outer peripheral wall of the second valve core along the radial direction of the second valve core, and along the circumferential direction of the second valve core, the second valve core is provided with a blocking part; The second valve core can rotate between a first position and a second position in the second bypass channel, during the rotation of the second valve core from the first position to the second position, the opening degree of the second bypass channel gradually decreases, during the rotation of the second valve core from the second position to the first position, the opening degree of the second bypass channel gradually increases, in the first position, the communication area of the communication channel and the second bypass channel is maximum, in the second position, the blocking part at least partially blocks the second bypass channel; The side of the first valve core close to the water outlet channel is provided with the first transmission part, the side of the second valve core close to the first bypass channel is provided with the second transmission part, the first transmission part is used to act on the second transmission part and push the second transmission part to rotate around the axis of the transmission channel when the first valve core rotates around the axis of the first bypass channel, the second reset member is connected with the second valve core, and the second reset member is used to drive the second valve core to rotate from the second position to the first position.

2. The bypass valve of claim 1, wherein When the second valve core is located at the first position, the communication channel is completely communicated with the second bypass channel; When the second valve core is located at the second position, the blocking part completely blocks the second bypass channel.

3. The bypass valve of claim 1, wherein The first transmission part extends along the axis of the first bypass channel, the second transmission part extends along the axis of the transmission channel, and when the first valve core rotates around the axis of the first bypass channel, the outer peripheral wall of the first transmission part can abut against the outer peripheral wall of the second transmission part and push the second transmission part to rotate around the axis of the transmission channel.

4. The bypass valve of claim 3, wherein The end of the first transmission part close to the first valve core is fixedly connected with the first valve core, and the end of the first transmission part away from the first valve core can rotate towards the opposite direction of the rotation direction of the first valve core.

5. The bypass valve of claim 3, wherein The outer peripheral wall of the first valve core is provided with a first engaging portion, and the outer peripheral wall of the second valve core is provided with a second engaging portion located in the first bypass passage, the first engaging portion being used for engaging with the second engaging portion to drive the second valve core to rotate around the axis of the transmission passage after the first transmission portion drives the second transmission portion to rotate.

6. The bypass valve of claim 5, wherein The second valve core is provided with a plurality of second transmission portions and a plurality of second engaging portions, the plurality of second transmission portions being uniformly spaced along the circumference of the second valve core, and the plurality of second engaging portions being uniformly spaced along the outer peripheral wall of the second valve core.

7. The bypass valve of claim 1, wherein The side wall of the transmission passage away from the first bypass passage is provided with a sliding groove extending along the circumference of the transmission passage, and the second valve core is provided with a limiting block on the side facing the sliding groove, the limiting block being used for sliding in the sliding groove. The sliding groove has a first limiting end and a second limiting end, when the limiting block abuts against the first limiting end, the second valve core is located at the first position, and when the limiting block abuts against the second limiting end, the second valve core is located at the second position.

8. The bypass valve of claim 1, wherein The second valve core is provided with an annular mounting groove extending along the circumference of the second valve core, and the second reset member is mounted in the mounting groove, the second reset member being a volute spring.

9. The bypass valve of claim 1, wherein The first bypass passage is provided with a limiting portion at the end close to the water outlet passage, the limiting portion being fixedly connected with the valve body, and the two ends of the first reset member abut against the limiting portion and the first valve core respectively.

10. The bypass valve of claim 9, wherein The first valve core includes a bottom wall and an annular side wall, the bottom wall being connected to the end of the side wall away from the water outlet passage, the two ends of the first reset member abutting against the bottom wall and the limiting portion respectively, and the first transmission portion being connected to the end of the side wall away from the bottom wall.

11. The bypass valve of claim 10, wherein The driving member includes an impeller and an impeller shaft, the impeller being located in the water outlet passage, the impeller being connected to the impeller shaft and being used for driving the impeller shaft to rotate around the axis of the first bypass passage, and the bottom wall being provided with a transmission sleeve, the impeller shaft penetrating through the transmission sleeve.

12. The bypass valve of claim 1, wherein The first bypass passage is provided with a step portion at the end communicating with the water inlet passage, the step portion extending inwardly along the radial direction of the first bypass passage from the inner peripheral wall of the first bypass passage, and when the first valve core is located at the initial position, the first valve core abuts against the step portion.

13. A gas water heater comprising a water inlet pipe, a heat exchanger and a water outlet pipe, characterised in that, The gas water heater further comprises the bypass valve according to any one of claims 1-12; The water inlet end and the water outlet end of the water inlet passage of the bypass valve are respectively connected with the water inlet pipe and the water inlet end of the heat exchanger; The water inlet end and the water outlet end of the water outlet passage of the bypass valve are respectively connected with the water outlet end of the heat exchanger and the water outlet pipe.

Images