Bypass valve and gas water heater

Abstract

The present invention provides a bypass valve and a gas water heater, relating to the technical field of water heaters. The bypass valve includes a valve body, and the valve body is provided with a water inlet channel, a water outlet channel, a first bypass path and a second bypass path; a limiting portion is provided at one end of the first bypass path communicating with the water outlet channel, a movable valve core is provided at one end of the first bypass path communicating with the water inlet channel, and two ends of an elastic member are respectively abutted against the limiting portion and the movable valve core; the rotating valve core is provided with a communication channel and a blocking portion; a protruding portion is provided on the outer peripheral wall of the movable valve core, and a sliding groove is provided on the rotating valve core, and the protruding portion is in fit connection with the sliding groove; the rotating valve core can be driven by the movable valve core to rotate from a first position to a second position in the second bypass path. During this process, the communication area between the communication channel and the second bypass path gradually decreases, and the opening degree of the second bypass path gradually decreases. Through the above structural arrangement, the bypass valve can automatically adjust the bypass flow according to the change in the magnitude of the incoming water flow rate.

Description

Technical Field

[0001] The present invention relates to the technical field of water heaters, and particularly to a bypass valve and a gas water heater. Background Art

[0002] When the user closes the faucet during a shower, the water in the heat exchanger of the gas water heater stops flowing. Due to the certain thermal inertia of the heat exchanger, heat will continue to conduct to the water inside the heat exchanger, resulting in too high temperature of this part of the water. When the user turns on the faucet again, they will feel discomfort caused by a section of high-temperature water. Usually, the solution is to connect a bypass pipe between the inlet pipe and the outlet pipe inside the water heater, so that a part of the cold water does not flow through the heat exchanger, but directly flows through the bypass pipe to the outlet pipe of the water heater, and use this part of the cold water to neutralize the hot water section caused by the temperature rise of the stopped water.

[0003] For example, Chinese Patent CN216114719U discloses a joint and a gas instantaneous water heater for reducing the temperature rise of stopped water, which realizes the connection between the inlet pipe and the cold water pipe of the water heater through an inlet joint, a connection channel and an outlet joint, and realizes the adjustment of the bypass flow rate in the bypass pipe by setting a sealing valve stem, a first spring and a fixed base in the connection channel and a regulating valve core in the inlet joint. However, the adjustment of its bypass flow rate can only be achieved by externally rotating the regulating valve core and cannot be adjusted by means of water flow rate, so its adaptability is poor. Summary of the Invention

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

[0005] The present invention solves the above technical problem through the following technical solutions:

[0006] A bypass valve includes a valve body, the valve body is provided with an inlet channel and an outlet channel, a first bypass path and a second bypass path are communicated between the inlet channel and the outlet channel, and the bypass valve further includes a movable valve core, a rotating valve core and an elastic member;

[0007] One end of the first bypass path communicated with the outlet channel is provided with a limiting portion, the limiting portion is fixedly connected to the valve body, one end of the first bypass path communicated with the inlet channel is provided with the movable valve core, and two ends of the elastic member respectively abut against the limiting portion and the movable valve core;

[0008] The rotating valve core penetrates the second bypass passage along the radial direction of the second bypass passage and is used to rotate around the radial direction of the second bypass passage. Along the radial direction of the rotating valve core, a communication passage is provided on the rotating valve core. Along the circumferential direction of the rotating valve core, a blocking portion is provided on the rotating valve core;

[0009] A transmission passage is communicated between the first bypass passage and the second bypass passage. A protruding portion is provided on the outer peripheral wall of the moving valve core. An arc-shaped sliding groove is provided on one side of the rotating valve core close to the moving valve core. The protruding portion penetrates through the transmission passage and is in fit connection with the sliding groove;

[0010] The rotating valve core can rotate between a first position and a second position in the second bypass passage. During the process of the rotating valve core rotating from the first position to the second position, the opening degree of the second bypass passage gradually decreases. During the process of the rotating valve core rotating from the second position to the first position, the opening degree of the second bypass passage gradually increases;

[0011] Wherein, when the moving valve core moves in the direction close to the limiting portion, through the cooperation of the protruding portion and the sliding groove, the rotating valve core is driven to rotate from the first position to the second position.

[0012] In this solution, 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 the minimum bypass flow rate. The bypass flow rate of the second bypass passage is adjustable, and the applicability is relatively strong; when water flows into the water inlet passage, part of the water flows into the water outlet passage through the first bypass passage. At the same time, under the action of the water flow pressure, the moving valve core moves towards the limiting portion. During this process, the elastic member abutted between the moving valve core and the limiting portion is compressed and deformed. At the same time, the protruding portion on the moving valve core is driven to move towards the limiting portion. Also, because the protruding portion is in fit connection with the sliding groove of the rotating valve core, therefore, during the movement of the protruding portion, the rotating valve core can be driven to rotate from the first position to the second position through the arc-shaped sliding groove. When the rotating valve core is in the first position, the communication area between the communication passage of the rotating valve core and the second bypass passage is relatively large, that is, the opening degree of the second bypass passage is relatively large. When the rotating valve core rotates towards the second position, the communication area between the communication passage of the rotating valve core and the second bypass passage gradually decreases, and the blocking area of the blocking portion of the rotating valve core for the second bypass passage gradually increases, that is, the opening degree of the second bypass passage gradually decreases; when the water flow in the water inlet passage decreases, under the action of the elastic restoring force of the elastic member, the moving valve core moves in the direction away from the limiting portion, thereby driving the rotating valve core to rotate 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 structural arrangement, the bypass valve can automatically adjust the bypass flow rate according to the change of the size of the water flow in the water inlet passage.

[0013] Preferably, the sliding groove has a first limiting end and a second limiting end;

[0014] When the rotating valve core is in the first position, the protruding portion is located at the first limiting end, and the communication channel is completely communicated with the second bypass passage;

[0015] When the rotating valve core is in the second position, the protruding portion is located at the second limiting end, and the blocking portion completely blocks the second bypass passage.

[0016] In this solution, when the rotating valve core is in the first position, the protruding portion is limited at the first limiting end to ensure that the communication channel of the rotating valve core is completely communicated with the second bypass passage. At this time, the opening degree of the second bypass passage reaches the maximum value; when the rotating valve core is in the second position, the protruding portion is limited at the second limiting end to ensure that the blocking portion of the rotating valve core completely blocks the second bypass passage. At this time, the opening degree of the second bypass passage is zero; through the settings of the first limiting end and the second limiting end, it is convenient to control the upper limit and the lower limit of the opening degree of the second bypass passage.

[0017] Preferably, the rotating valve core includes a first rotating portion and a second rotating portion, and the blocking portion is connected between the first rotating portion and the second rotating portion;

[0018] The first rotating portion is arranged in the transmission channel, and a sliding groove is arranged on one side of the first rotating portion facing the protruding portion;

[0019] A rotating groove is arranged on the side wall of the second bypass passage far from the transmission channel, and the second rotating portion is sleeved on the inner peripheral wall of the rotating groove.

[0020] In this solution, the first rotating portion is arranged in the transmission channel on one side of the second bypass passage, the second rotating portion is arranged in the rotating groove on the other side of the second bypass passage, and the first rotating portion and the second rotating portion are connected by the blocking portion. During the rotation of the rotating valve core, the first rotating portion and the second rotating portion rotate on both sides of the second bypass passage, driving the blocking portion located in the second bypass passage to rotate so as to adjust the opening degree of the second bypass passage. The whole rotation process is stable and reliable.

[0021] Preferably, the first rotating portion, the second rotating portion and the blocking portion are arranged around the same rotation axis, and the blocking portion is connected to the outer peripheral walls of the first rotating portion and the second rotating portion.

[0022] In this solution, the first rotating portion, the second rotating portion and the blocking portion are arranged around the same rotation axis, which is convenient for the structural setting and processing of the rotating valve core. The blocking portion is connected to the outer peripheral walls of the first rotating portion and the second rotating portion, so that the blocking portion has a larger rotation path around the rotation axis, and thus it is convenient to adjust the opening degree of the second bypass passage.

[0023] Preferably, the first rotating part is a circular plate member; and / or,

[0024] the second rotating part is an annular member; and / or,

[0025] the blocking part is an arc-shaped plate member.

[0026] In this solution, the first rotating part is a circular plate member, which can block the transmission channel while rotating, avoiding the water flow connection between the first bypass and the second bypass, and being set as a circular plate member makes the rotating movement smoother; since the second rotating part is arranged in the rotating groove and does not require a water blocking function but mainly plays a positioning role, an annular member is used as the second rotating part, which reduces the material consumption and saves costs while ensuring smooth rotation; the blocking part is an arc-shaped plate member, which is convenient for connecting with the outer peripheral walls of the first rotating part and the second rotating part, and is convenient for setting the three to rotate around the same axis.

[0027] Preferably, the moving valve core includes an abutting part and an annular side wall, the side wall is arranged in the first bypass, the protruding part is arranged on the side of the side wall close to the rotating valve core, the abutting part is connected to one end of the side wall away from the limiting part, and the two ends of the elastic member respectively abut against the abutting part and the limiting part.

[0028] In this solution, the abutting part is used to abut against one end of the elastic member, which is convenient for the moving valve core to compress the elastic member when moving towards the limiting part; the annular side wall is beneficial to maintaining the stability of the moving valve core during the moving process, and the protruding part is connected to the side wall, which is convenient for mating connection with the sliding groove of the rotating valve core.

[0029] Preferably, one of the abutting part and the limiting part is provided with a guide sleeve and the other is provided with a guide rod, the guide sleeve is sleeved on the outer peripheral wall of the guide rod, and the elastic member is sleeved on the outer sides of the guide rod and the guide sleeve.

[0030] In this solution, a guide sleeve and a guide rod are arranged between the abutting part and the limiting part, which has a good guiding effect on the movement of the moving valve core, so that the moving valve core can move more accurately along the axial direction of the first bypass during the moving process and avoid deviation.

[0031] Preferably, a plurality of first water through holes are formed in the abutting part, and the plurality of first water through holes are uniformly arranged along the circumferential direction of the abutting part; and / or,

[0032] a plurality of second water through holes are formed in the limiting part, and the plurality of second water through holes are uniformly arranged along the circumferential direction of the limiting part.

[0033] In this solution, the arrangement of the first water through-hole of the abutting portion facilitates the uniform inflow of the water in the water inlet passage into the first bypass passage, and at the same time makes the driving force of the water flow on the movable valve core more uniform; the arrangement of the second water through-hole of the limiting portion enables the water flow in the first bypass passage to flow out more uniformly into the water outlet passage.

[0034] Preferably, a step portion is provided at one end of the first bypass passage communicating with the water inlet passage. When the rotating valve core is in the first position, the movable valve core abuts against the step portion.

[0035] In this solution, the arrangement of the step portion can limit the movable valve core. The movable valve core is limited in the first bypass passage by the limiting portion, the elastic member and the step portion, ensuring the movement of the movable valve core in the first bypass passage.

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

[0037] The water inlet end and the water outlet end of the water inlet passage of the bypass valve are respectively communicated with 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 passage of the bypass valve are respectively communicated with the water outlet end of the heat exchanger and the water outlet pipe.

[0039] In this solution, when the user turns off the hot water after using the gas water heater, due to the certain heat inertia of the heat exchanger, the heat will continue to conduct to the water inside the heat exchanger, resulting in too high temperature of this part of the water and flowing into the water outlet pipe. By setting the above-mentioned bypass valve, the cold water in the water inlet pipe flows into the hot water pipe through the bypass valve, which can neutralize the hot water with too high temperature in the hot water pipe, avoiding discomfort or even scalding when the user turns on the hot water again, and solving the problem of temperature rise during water stop; at the same time, when no cold water is introduced into the bypass valve, the rotating valve core is in the first position. At this time, the opening of the second bypass passage is the largest, the total bypass flow rate of the bypass valve is the largest, and the cold water flow rate flowing out to the water outlet pipe is the largest, which can better neutralize the hot water with too high temperature in the water outlet pipe and solve the problem of temperature rise during water stop. After that, the water temperature in the water outlet pipe is no longer too high, and the amount of cold water required for neutralization gradually decreases. At this time, the bypass valve rotates from the first position to the second position with the rotating valve core, the opening of the second bypass passage gradually decreases, the total bypass flow rate of the bypass valve gradually decreases, and the cold water flow rate flowing out to the water outlet pipe gradually decreases, which is adapted to the amount of cold water required for neutralizing the hot water, avoiding other problems caused by too large bypass flow rate, such as direct outflow of excessive cold water without heating, too small water flow rate through the heat exchanger causing water boiling, etc.; when the water use stops, the elastic member can push the movable valve core to move away from the limiting portion for resetting to facilitate subsequent reuse.

[0040] The positive and progressive effects of the present invention are as follows:

[0041] In the present invention, 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 the minimum bypass flow rate. The bypass flow rate of the second bypass passage is adjustable, and the applicability is relatively strong. When water flows into the water inlet passage, part of the water flows into the water outlet passage through the first bypass passage. At the same time, under the action of the water flow pressure, the movable valve core moves towards the limiting part. During this process, the elastic member abutted between the movable valve core and the limiting part is compressed and deformed. At the same time, the protruding part on the movable valve core is driven to move towards the limiting part. Also, because the protruding part is connected with the sliding groove of the rotating valve core in a matching manner, therefore, during the movement of the protruding part, it can drive the rotating valve core to rotate from the first position to the second position through the arc-shaped sliding groove. When the rotating valve core is in the first position, the communication area between the communication passage of the rotating valve core and the second bypass passage is relatively large, that is, the opening degree of the second bypass passage is relatively large. When the rotating valve core rotates towards the second position, the communication area between the communication passage of the rotating valve core and the second bypass passage gradually decreases, and the blocking area of the blocking part of the rotating valve core for the second bypass passage gradually increases, that is, the opening degree of the second bypass passage gradually decreases. When the incoming water flow in the water inlet passage decreases, under the action of the elastic restoring force of the elastic member, the movable valve core moves in a direction away from the limiting part, thereby driving the rotating valve core to rotate 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 structural arrangement, the bypass valve can automatically adjust the bypass flow rate according to the change in the magnitude of the incoming water flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic structural diagram of a gas water heater according to an embodiment of the present invention.

[0043] Figure 2 It is a three-dimensional structural diagram of a bypass valve according to an embodiment of the present invention.

[0044] Figure 3 It is a cross-sectional structural diagram of a movable valve core and a rotating valve core according to an embodiment of the present invention.

[0045] Figure 4 It is a cross-sectional structural diagram of a bypass valve according to an embodiment of the present invention (the communication passage is in a communicating state with the second bypass passage).

[0046] Figure 5 It is a three-dimensional structural diagram of a movable valve core and a rotating valve core according to an embodiment of the present invention (the rotating valve core is in the first position).

[0047] Figure 6 It is a cross-sectional structural diagram of a bypass valve according to an embodiment of the present invention (the second bypass passage is in a blocked state).

[0048] Figure 7Schematic three-dimensional structure diagram of the movable valve core and the rotating valve core according to an embodiment of the present invention (the rotating valve core is in the second position).

[0049] Description of reference numerals:

[0050] Gas water heater 200

[0051] Water inlet pipe 201

[0052] Heat exchanger 202

[0053] Water outlet pipe 203

[0054] Smoke collecting hood 204

[0055] Combustion chamber 205

[0056] Gas distribution system 206

[0057] Fan 207

[0058] Electric controller 208

[0059] Bypass valve 100

[0060] Valve body 1

[0061] Water inlet channel 11

[0062] First water inlet 111

[0063] First water outlet 112

[0064] Water outlet channel 12

[0065] Second water inlet 121

[0066] Second water outlet 122

[0067] First bypass passage 13

[0068] Second bypass passage 14

[0069] Transmission channel 15

[0070] Rotating groove 16

[0071] Step portion 17

[0072] Movable valve core 2

[0073] Protruding portion 21

[0074] Abutting portion 22

[0075] First water passing hole 221

[0076] Side wall 23

[0077] Guide sleeve 24

[0078] Rotating the valve core 3

[0079] Connecting channel 31

[0080] Blocking part 32

[0081] First rotating part 33

[0082] Sliding groove 331

[0083] Second rotating part 34

[0084] Elastic member 4

[0085] Limiting part 51

[0086] Second water passing hole 511

[0087] Guide rod 52 Specific implementation mode

[0088] The present invention will be more clearly and completely described below by way of embodiments in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments thereby.

[0089] As Figure 1 shown, this embodiment provides a gas water heater 200, which includes a water inlet pipe 201, a heat exchanger 202 and a water outlet pipe 203. The gas water heater 200 further includes a bypass valve 100. The bypass valve 100 is provided with a water inlet channel 11 and a water outlet channel 12. The water inlet end (i.e., the first water inlet 111) and the water outlet end (i.e., the first water outlet 112) of the water inlet channel 11 are respectively communicated with the water inlet end of the water inlet pipe 201 and the heat exchanger 202; the water inlet end (i.e., the second water inlet 121) and the water outlet end (i.e., the second water outlet 122) of the water outlet channel 12 are respectively communicated with 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 certain heat inertia of the heat exchanger 202, the heat will continue to conduct to the water inside the heat exchanger 202, resulting in too high temperature of this part of the water and flowing into the water outlet pipe 203. By setting the bypass valve 100, the gas water heater 200 enables the cold water in the water inlet pipe 201 to flow into the hot water pipe through the bypass valve 100, so as to neutralize the hot water with too high temperature in the hot water pipe, avoid discomfort or even scalding when the user turns on the hot water again, and solve the problem of water temperature rise during shutdown.

[0090] Specifically, the gas water heater 200 further includes a gas distribution system 206, a combustion chamber 205, and a smoke collecting hood 204. The gas distribution system 206 provides a gas source for the combustion of gas in the combustion chamber 205. The smoke collecting hood 204 is used to collect the exhaust gas generated by the combustion of gas and discharge it. The gas water heater 200 further includes a blower 207, which is used to introduce air flow into the combustion chamber 205 to improve the combustion efficiency of the gas. In addition, the gas water heater 200 further includes an electronic controller 208, which controls the gas path and water path of the gas water heater 200.

[0091] As Figures 2 to 7 shown, the bypass valve 100 includes a valve body 1. The valve body 1 is provided with a water inlet passage 11 and a water outlet passage 12. A first bypass passage 13 and a second bypass passage 14 are communicated between the water inlet passage 11 and the water outlet passage 12. The bypass valve 100 further includes a movable valve core 2, a rotating valve core 3, and an elastic member 4. One end of the first bypass passage 13 communicated with the water outlet passage 12 is provided with a limiting portion 51, and the limiting portion 51 is fixedly connected to the valve body 1. One end of the first bypass passage 13 communicated with the water inlet passage 11 is provided with the movable valve core 2. Two ends of the elastic member 4 respectively abut against the limiting portion 51 and the movable valve core 2. The rotating valve core 3 penetrates through the second bypass passage 14 along the radial direction of the second bypass passage 14 and is used to rotate around the radial direction of the second bypass passage 14. Along the radial direction of the rotating valve core 3, the rotating valve core 3 is provided with a communicating passage 31. Along the circumferential direction of the rotating valve core 3, the rotating valve core 3 is provided with a blocking portion 32. A transmission passage 15 is communicated between the first bypass passage 13 and the second bypass passage 14. A protruding portion 21 is provided on the outer peripheral wall of the movable valve core 2. An arc-shaped sliding groove 331 is provided on one side of the rotating valve core 3 close to the movable valve core 2. The protruding portion 21 penetrates through the transmission passage 15 and is connected with the sliding groove 331 in a matching manner. The rotating valve core 3 can be in a first position (such as the position relationship shown in Figure 4 the figure) and a second position (such as Figure 6It rotates between the position relationships shown in the figure. During the process of the rotating valve core 3 rotating from the first position to the second position, the opening degree of the second bypass passage 14 gradually decreases. During the process of the rotating valve core 3 rotating from the second position to the first position, the opening degree of the second bypass passage 14 gradually increases. Among them, when the moving valve core 2 moves in the direction close to the limiting part 51, through the cooperation of the protruding part 21 and the sliding groove 331, the rotating valve core 3 is driven to rotate from the first position to the second position. 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. The bypass flow rate of the second bypass passage 14 is adjustable, and the applicability is relatively strong. When water flows into the water inlet passage 11, part of the water flows into the water outlet passage 12 through the first bypass passage 13. At the same time, under the action of the water flow pressure, the moving valve core 2 moves towards the limiting part 51. During this process, the elastic member 4 abutted between the moving valve core 2 and the limiting part 51 is compressed and deformed. At the same time, the protruding part 21 on the moving valve core 2 is driven to move towards the limiting part 51. Also, because the protruding part 21 is connected to the sliding groove 331 of the rotating valve core 3 in a matching manner, therefore, during the movement of the protruding part 21, it can drive the rotating valve core 3 to rotate from the first position to the second position through the arc-shaped sliding groove 331. When the rotating valve core 3 is in the first position, the communication area between the communication passage 31 of the rotating valve core 3 and the second bypass passage 14 is relatively large, that is, the opening degree of the second bypass passage 14 is relatively large. When the rotating valve core 3 rotates towards the second position, the communication area between the communication passage 31 of the rotating valve core 3 and the second bypass passage 14 gradually decreases, and the blocking area of the blocking part 32 of the rotating valve core 3 for the second bypass passage 14 gradually increases, that is, the opening degree of the second bypass passage 14 gradually decreases. When the inflowing water flow in the water inlet passage 11 decreases, under the action of the elastic restoring force of the elastic member 4, the moving valve core 2 moves in the direction away from the limiting part 51, thereby driving the rotating valve core 3 to rotate 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 structural settings, the bypass valve 100 can automatically adjust the bypass flow rate according to the change in the size of the inflowing water flow.

[0092] Specifically, in this embodiment, the limiting part 51 is a circular plate provided with a plurality of through holes (i.e., the second water through holes 511), the elastic member 4 is a spring, the outer diameter of the limiting part 51 is adapted to the inner diameter of the first bypass passage 13, and the limiting part 51 is fixedly connected to one end where the first bypass passage 13 communicates with the water outlet passage 12 and is located inside the first bypass passage 13.

[0093] In this embodiment, the sliding groove 331 has a first limiting end and a second limiting end; when the rotating valve core 3 is located at the first position, the protruding portion 21 is located at the first limiting end, and the communication channel 31 is completely communicated with the second bypass passage 14; when the rotating valve core 3 is located at the second position, the protruding portion 21 is located at the second limiting end, and the blocking portion 32 completely blocks the second bypass passage 14. When the rotating valve core 3 is located at the first position, the protruding portion 21 is limited at the first limiting end, ensuring that the communication channel 31 of the rotating valve core 3 is completely communicated with the second bypass passage 14. At this time, the opening degree of the second bypass passage 14 reaches the maximum value; when the rotating valve core 3 is located at the second position, the protruding portion 21 is limited at the second limiting end, ensuring that the blocking portion 32 of the rotating valve core 3 completely blocks the second bypass passage 14. At this time, the opening degree of the second bypass passage 14 is zero; through the settings of the first limiting end and the second limiting end, it is convenient to control the upper limit and the lower limit of the opening degree of the second bypass passage 14.

[0094] In this embodiment, the rotating valve core 3 includes a first rotating portion 33 and a second rotating portion 34, and the blocking portion 32 is connected between the first rotating portion 33 and the second rotating portion 34; the first rotating portion 33 is arranged in the transmission channel 15, and a sliding groove 331 is arranged on the side of the first rotating portion 33 facing the protruding portion 21; a rotating groove 16 is arranged on the side wall 23 of the second bypass passage 14 far from the transmission channel 15, and the second rotating portion 34 is sleeved on the inner peripheral wall of the rotating groove 16. The first rotating portion 33 is located in the transmission channel 15 on one side of the second bypass passage 14, and the second rotating portion 34 is located in the rotating groove 16 on the other side of the second bypass passage 14. The first rotating portion 33 and the second rotating portion 34 are connected by the blocking portion 32. During the rotation of the rotating valve core 3, the first rotating portion 33 and the second rotating portion 34 rotate on both sides of the second bypass passage 14, driving the blocking portion 32 located in the second bypass passage 14 to rotate, so as to adjust the opening degree of the second bypass passage 14, and the whole rotation process is stable and reliable.

[0095] In this embodiment, the first rotating portion 33, the second rotating portion 34 and the blocking portion 32 are arranged around the same rotation axis, and the blocking portion 32 is connected to the outer peripheral walls of the first rotating portion 33 and the second rotating portion 34. The first rotating portion 33, the second rotating portion 34 and the blocking portion 32 are arranged around the same rotation axis, which is convenient for the structural setting and processing of the rotating valve core 3. The blocking portion 32 is connected to the outer peripheral walls of the first rotating portion 33 and the second rotating portion 34, so that the blocking portion 32 has a larger rotation path around the rotation axis, and thus it is convenient to adjust the opening degree of the second bypass passage 14.

[0096] In this embodiment, the first rotating part 33 is a circular plate member; the second rotating part 34 is an annular member; the blocking part 32 is an arc-shaped plate member. The first rotating part 33 being a circular plate member can block the transmission channel 15 while rotating, preventing the water flow in the first bypass 13 and the second bypass 14 from communicating, and being set as a circular plate member makes the rotating motion smoother; since the second rotating part 34 is arranged in the rotating groove 16 and does not require a water-blocking function but mainly serves a positioning function, an annular member is used as the second rotating part 34, which reduces the material usage and saves costs while ensuring smooth rotation; the blocking part 32 being an arc-shaped plate member facilitates connection to the outer peripheral walls of the first rotating part 33 and the second rotating part 34, and also facilitates setting the three to rotate around the same axis.

[0097] In this embodiment, the moving valve core 2 includes an abutting part 22 and an annular side wall 23. The side wall 23 is arranged in the first bypass 13. A protruding part 21 is provided on the side of the side wall 23 close to the rotating valve core 3. The abutting part 22 is connected to one end of the side wall 23 away from the limiting part 51. The two ends of the elastic member 4 respectively abut against the abutting part 22 and the limiting part 51. The abutting part 22 is used to abut against one end of the elastic member 4, facilitating the moving valve core 2 to compress the elastic member 4 when moving towards the limiting part 51; the annular side wall 23 helps to maintain the stability of the moving valve core 2 during movement, and the protruding part 21 is connected to the side wall 23, facilitating mating connection with the sliding groove 331 of the rotating valve core 3.

[0098] In this embodiment, one of the guide sleeve 24 and the guide rod 52 is provided on the abutting part 22, and the other of the guide sleeve 24 and the guide rod 52 is provided on the limiting part 51. The guide sleeve 24 is sleeved on the outer peripheral wall of the guide rod 52, and the elastic member 4 is sleeved on the outer sides of the guide rod 52 and the guide sleeve 24. The guide sleeve 24 and the guide rod 52 are arranged between the abutting part 22 and the limiting part 51, which has a good guiding effect on the movement of the moving valve core 2, enabling the moving valve core 2 to move more accurately along the axial direction of the first bypass 13 during movement and avoiding deviation.

[0099] Specifically, in this embodiment, the side wall 23, the abutting part 22 and the guide sleeve 24 are integrally formed. An annular abutting groove is defined among the side wall 23, the abutting part 22 and the guide sleeve 24. One end of the elastic member 4 abuts in the abutting groove. The formation of the abutting groove makes the abutting of the abutting part 22 against the elastic member 4 more stable, preventing the elastic member 4 from deviating during the compression deformation process; at the same time, the limiting part 51 and the guide rod 52 are integrally formed, further improving the structural stability and the assembly efficiency.

[0100] In this embodiment, a plurality of first water through holes 221 are formed in the abutting portion 22, and the plurality of first water through holes 221 are uniformly arranged along the circumferential direction of the abutting portion 22; a plurality of second water through holes 511 are formed in the limiting portion 51, and the plurality of second water through holes 511 are uniformly arranged along the circumferential direction of the limiting portion 51. The arrangement of the first water through holes 221 in the abutting portion 22 facilitates the water in the water inlet channel 11 to uniformly flow into the first bypass channel 13, and at the same time makes the driving force of the water flow on the movable valve core 2 more uniform; the arrangement of the second water through holes 511 in the limiting portion 51 enables the water flow in the first bypass channel 13 to more uniformly flow out into the water outlet channel 12.

[0101] In this embodiment, a step portion 17 is provided at one end of the first bypass channel 13 communicating with the water inlet channel 11. When the rotating valve core 3 is in the first position, the movable valve core 2 abuts against the step portion 17. The arrangement of the step portion 17 can limit the movable valve core 2, and the movable valve core 2 is limited in the first bypass channel 13 by the limiting portion 51, the elastic member 4 and the step portion 17 to ensure that the movable valve core 2 moves in the first bypass channel 13.

[0102] Specifically, the bypass flow regulation of the bypass valve 100 is adapted to the hot water temperature regulation in the water outlet pipe 203 of the gas water heater 200, and the principle is as follows: when no cold water is introduced into the bypass valve 100, the rotating valve core 3 is in the first position. At this time, the opening degree of the second bypass channel 14 is the largest, the total bypass flow of the bypass valve 100 is the largest, and the cold water flow flowing out to the water outlet pipe 203 is the largest, which can better neutralize the overheated hot water in the water outlet pipe 203 and solve the problem of stop water temperature rise. After that, the water temperature in the water outlet pipe 203 is no longer too high, and the required cold water volume for neutralization gradually decreases. At this time, the bypass valve 100 rotates with the rotating valve core 3 from the first position to the second position, the opening degree of the second bypass channel 14 gradually decreases, the total bypass flow of the bypass valve 100 gradually decreases, and the cold water flow flowing out to the water outlet pipe 203 gradually decreases, which is adapted to the cold water volume required for neutralizing the hot water, and avoids other problems caused by too large bypass flow, such as excessive cold water flowing out directly without heating and water boiling caused by too small water flow through the heat exchanger 202; when the water use stops, the elastic member 4 can push the movable valve core 2 to move away from the limiting portion 51 for resetting to facilitate subsequent reuse.

[0103] Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that this is only an example, and the protection scope of the present invention is defined by the appended claims. Without departing from the principle and essence of the present invention, those skilled in the art can make various changes or modifications to these embodiments, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A bypass valve, comprising a valve body, characterized in that, the valve body is provided with a water inlet passage and a water outlet passage, a first bypass passage and a second bypass passage are communicated between the water inlet passage and the water outlet passage, and the bypass valve further comprises a movable valve core, a rotating valve core and an elastic member; one end of the first bypass passage communicated with the water outlet passage is provided with a limiting portion, the limiting portion is fixedly connected with the valve body, the movable valve core is arranged at one end of the first bypass passage communicated with the water inlet passage, and two ends of the elastic member respectively abut against the limiting portion and the movable valve core; the rotating valve core penetrates through the second bypass passage along the radial direction of the second bypass passage and is used for rotating around the radial direction of the second bypass passage. Along the radial direction of the rotating valve core, the rotating valve core is provided with a communicating passage, and along the circumferential direction of the rotating valve core, the rotating valve core is provided with a blocking portion; a transmission passage is communicated between the first bypass passage and the second bypass passage, a protruding portion is arranged on the outer peripheral wall of the movable valve core, an arc-shaped sliding groove is arranged on one side of the rotating valve core close to the movable valve core, and the protruding portion penetrates through the transmission passage and is in fit connection with the sliding groove; the rotating valve core can rotate between a first position and a second position in the second bypass passage. During the process that the rotating valve core rotates from the first position to the second position, the opening degree of the second bypass passage gradually decreases. During the process that the rotating valve core rotates from the second position to the first position, the opening degree of the second bypass passage gradually increases; wherein, when the movable valve core moves towards the direction close to the limiting portion, the rotating valve core is driven to rotate from the first position to the second position through the cooperation of the protruding portion and the sliding groove.

2. The bypass valve according to claim 1, characterized in that, the sliding groove has a first limiting end and a second limiting end; when the rotating valve core is in the first position, the protruding portion is at the first limiting end, and the communicating passage is completely communicated with the second bypass passage; when the rotating valve core is in the second position, the protruding portion is at the second limiting end, and the blocking portion completely blocks the second bypass passage.

3. The bypass valve according to claim 1, characterized in that, the rotating valve core comprises a first rotating portion and a second rotating portion, and the blocking portion is connected between the first rotating portion and the second rotating portion; the first rotating portion is arranged in the transmission passage, and the sliding groove is arranged on one side of the first rotating portion facing the protruding portion; a rotating groove is arranged on the side wall of the second bypass passage far away from the transmission passage, and the second rotating portion is sleeved on the inner peripheral wall of the rotating groove.

4. The bypass valve according to claim 3, characterized in that, the first rotating portion, the second rotating portion and the blocking portion are arranged around the same rotation axis, and the blocking portion is connected to the outer peripheral walls of the first rotating portion and the second rotating portion.

5. The bypass valve according to claim 4, characterized in that, the first rotating portion is a circular plate member; and / or, the second rotating portion is an annular member; and / or, the blocking portion is an arc-shaped plate member.

6. The bypass valve according to claim 1, wherein, the movable valve core includes an abutting portion and an annular side wall, the side wall is disposed in the first bypass passage, the protruding portion is provided on a side of the side wall close to the rotating valve core, the abutting portion is connected to an end of the side wall away from the limiting portion, and two ends of the elastic member respectively abut against the abutting portion and the limiting portion.

7. The bypass valve according to claim 6, wherein, one of a guide sleeve and a guide rod is provided on the abutting portion, the other of the guide sleeve and the guide rod is provided on the limiting portion, the guide sleeve is sleeved on an outer peripheral wall of the guide rod, and the elastic member is sleeved on outer peripheral sides of the guide rod and the guide sleeve.

8. The bypass valve according to claim 6, wherein, a plurality of first water passing holes are formed in the abutting portion, and the plurality of first water passing holes are uniformly arranged along a circumferential direction of the abutting portion; and / or, a plurality of second water passing holes are formed in the limiting portion, and the plurality of second water passing holes are uniformly arranged along a circumferential direction of the limiting portion.

9. The bypass valve according to claim 1, wherein, a stepped portion is provided at an end of the first bypass passage communicating with the water inlet passage, and when the rotating valve core is in the first position, the movable valve core abuts against the stepped portion.

10. A gas water heater, comprising a water inlet pipe, a heat exchanger and a water outlet pipe, wherein, the gas water heater further includes the bypass valve according to any one of claims 1-9; an inlet end and an outlet end of the water inlet passage of the bypass valve are respectively communicated with the water inlet pipe and an inlet end of the heat exchanger; an inlet end and an outlet end of the water outlet passage of the bypass valve are respectively communicated with an outlet end of the heat exchanger and the water outlet pipe.

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