Bypass valve and gas water heater

Abstract

The present invention provides a bypass valve and a gas water heater, which belong to the technical field of water heaters. The bypass valve includes a valve body, which is provided with a water inlet channel, a water outlet channel, a first bypass channel and a second bypass channel. The bypass valve also includes a movable valve core, a sliding valve core, a first elastic member and a second elastic member; the end of the first bypass channel connected to the water outlet channel is provided with a first limiting portion, and the two ends of the first elastic member respectively abut against the first limiting portion and the movable valve core; the sliding valve core is provided in the sliding channel and can slide along the axial direction of the sliding channel, and the two ends of the second elastic member respectively abut against the sliding valve core and the side wall of the sliding channel away from the first bypass channel; in the process of the sliding valve core sliding from the first position to the second position, the opening of the second bypass channel gradually decreases. Through the above-mentioned structural arrangement, the bypass valve can adjust the total bypass flow of the bypass valve on the basis of ensuring the minimum bypass flow, the stability of the bypass flow control is strong, and the failure risk of the bypass valve is low.

Description

Technical Field

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

[0002] When a user turns off the faucet while showering, the water in the gas water heater's heat exchanger stops flowing. Due to the heat inertia of the heat exchanger, heat continues to transfer to the water inside, causing this portion of the water to overheat. When the user turns on the faucet again, they experience a period of high temperature discomfort. A common solution is to connect a bypass device between the water inlet and outlet pipes inside the water heater. This bypass bypasses some of the cold water, bypassing the heat exchanger and instead flowing directly to the water heater's outlet. This cold water then neutralizes the temperature rise caused by the water outage.

[0003] For example, Chinese patent CN216114719U discloses a joint and a gas-fired instantaneous water heater for reducing the temperature rise during water outages. The joint connects the water inlet pipe and the cold water pipe of the water heater via a water inlet joint, a connecting channel, and a water outlet joint. The joint also includes a sealing valve stem, a first spring, and a fixed base within the connecting channel, and a regulating valve core within the water inlet joint to adjust the bypass flow rate within the bypass pipe. However, the bypass flow rate can only be adjusted by rotating the regulating valve core with an external force, and cannot be adjusted by water flow, resulting in poor adaptability. Summary of the Invention

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

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

[0006] A bypass valve comprises a valve body, the valve body being provided with a water inlet channel and a water outlet channel, the water inlet channel and the water outlet channel being connected to each other by a first bypass channel and a second bypass channel, the bypass valve further comprising a movable valve core, a sliding valve core, a first elastic member and a second elastic member;

[0007] A first limiting portion is provided at one end of the first bypass passage connected to the water outlet passage, the first limiting portion being fixedly connected to the valve body, and the movable valve core is provided at one end of the first bypass passage connected to the water inlet passage, with both ends of the first elastic member respectively abutting against the first limiting portion and the movable valve core;

[0008] The valve body is provided with a sliding channel, the sliding channel being connected to the first bypass channel and the second bypass channel, the sliding valve core being provided in the sliding channel and being able to slide along the axial direction of the sliding channel, and the two ends of the second elastic member respectively abutting against the sliding valve core and a side wall of the sliding channel away from the first bypass channel;

[0009] The sliding valve core is capable of sliding between a first position and a second position in the sliding channel. When the sliding valve core slides from the first position to the second position, the opening of the second bypass passage gradually decreases. When the sliding valve core slides from the second position to the first position, the opening of the second bypass passage gradually increases.

[0010] When the sliding valve core is located at the first position, the sliding valve core is partially located in the first bypass passage, and the movable valve core is used to squeeze the sliding valve core during the movement toward the first limiting portion so that the sliding valve core slides from the first position to the second position.

[0011] 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, which can ensure the minimum bypass flow requirement. The bypass flow of the second bypass passage is adjustable and has strong applicability. When water flows into the water inlet passage, part of the water flows into the water outlet passage through the first bypass passage, and part of the water flows into the water outlet passage through the second bypass passage. At the same time, under the continuous action of the water pressure, the movable valve core moves toward the first limiting part. During this process, the first elastic member abutting between the movable valve core and the first limiting part is compressed and deformed. At the same time, during the movement of the movable valve core, it can squeeze the part of the sliding valve core located in the first bypass passage, so that the sliding valve core slides from the first position to the second position. The second elastic member abutting between the sliding valve core and the side wall of the sliding passage away from the first bypass passage is compressed and deformed. When the sliding valve core is in the first position, the opening of the second bypass passage is larger. When the sliding valve core slides to the second position, the sliding valve core is pressed against the second bypass passage. The blocking area of ​​the passage gradually increases, that is, the opening of the second bypass passage gradually decreases; when the water flow in the water inlet channel decreases, under the action of the elastic force of the first elastic member, the movable valve core moves in the direction away from the first limit portion, and then under the action of the elastic force of the second elastic member, the sliding valve core can be reset from the second position to the first position, and the opening of the second bypass passage changes from small to large; through the above-mentioned structural setting, the bypass valve can adjust the total bypass flow of the bypass valve on the basis of ensuring the minimum bypass flow, the stability of the bypass flow control is strong, and the failure risk of the bypass valve is low.

[0012] Preferably, when the sliding valve core is located at the first position, the second bypass passage is fully connected;

[0013] When the sliding valve core is located at the second position, the movable valve core is pressed against the sliding valve core, and the sliding valve core completely blocks the second bypass passage.

[0014] In this solution, when the movable valve core does not contact the sliding valve core or has just contacted the sliding valve core, the sliding valve core is in the first position. At this time, the sliding valve core does not form any blockage on the second bypass passage, the second bypass passage is fully connected, and the opening of the second bypass passage reaches the maximum value; when the movable valve core squeezes the sliding valve core into place, the sliding valve core is in the second position, the sliding valve core completely blocks the second bypass passage, and the opening of the second bypass passage is zero. Through the squeezing process of the movable valve core on the sliding valve core, it is convenient to control the opening of the second bypass passage.

[0015] Preferably, the first elastic member is a thermally sensitive spring, and the elastic force of the first elastic member decreases as the temperature of the water flowing through it decreases.

[0016] In this solution, the thermosensitive spring has the characteristic that its elastic force decreases as the temperature rises. The first elastic member adopts a thermosensitive spring. When the water flow temperature in the water outlet channel is high, the elastic force of the first elastic member is large. At this time, the water flow in the water inlet channel is difficult to push the movable valve core toward the first limit part. The sliding valve core is in the first position, the opening of the second bypass channel is the largest, and the flow of cold water flowing from the water inlet channel through the first bypass channel and the second bypass channel to the water outlet channel is the largest, so as to better neutralize the hot water in the water outlet channel; when the water temperature in the water outlet channel decreases, the elastic force of the first elastic member decreases, and the water flow entering the first bypass channel can push the movable valve core toward the first limit part, and squeeze the sliding valve core during the movement so that the sliding valve core gradually slides from the first position to the second position, and the flow of cold water flowing from the water inlet channel through the first bypass channel and the second bypass channel to the water outlet channel gradually decreases to adapt to the situation where the cold water flow required to neutralize the hot water in the water outlet channel is continuously decreasing.

[0017] Preferably, a guide portion is provided at one end of the sliding valve core close to the first bypass passage, and a diameter of the guide portion gradually increases from the end surface facing the first bypass passage toward a direction away from the first bypass passage;

[0018] A guide groove is provided on the outer peripheral wall of the movable valve core close to the sliding valve core, the guide groove extends along the axial direction of the movable valve core, and the shape of the guide groove is adapted to the shape of the guide portion;

[0019] The guide groove is used to abut against the guide portion during the process of the movable valve core moving toward the first limiting portion, and to enable the sliding valve core to slide from the first position to the second position.

[0020] In this solution, when the sliding valve core is in the first position, part of it is located in the first bypass passage, and this part is provided with a guide portion, the diameter of the guide portion gradually increases from the end surface facing the first bypass passage to the direction away from the first bypass passage, thereby forming an inclined guide surface, and correspondingly, the outer peripheral wall of the movable valve core is provided with a guide groove, and in the process of the movable valve core moving toward the first limit portion, the guide groove abuts against the guide portion, and enables the sliding valve core to gradually slide from the first position to the second position.

[0021] Preferably, the sliding channel extends radially along the second bypass channel and passes through the second bypass channel, and a limiting groove is formed at one end of the sliding channel away from the first bypass channel, and both ends of the second elastic member respectively abut against the sliding valve core and the limiting groove.

[0022] In this solution, the sliding channel extends radially along the second bypass channel, which facilitates the sliding of the sliding valve core, so that the sliding valve core can slide from the first position to the second position with a shorter sliding path; the setting of the limit groove is conducive to improving the installation stability of the second elastic member, and at the same time facilitates the sliding valve core to slide to the second position so that the sliding valve core is partially located in the limit groove, which is conducive to improving the stability of the sliding valve core.

[0023] Preferably, a second limiting portion is provided at one end of the sliding channel close to the first bypass channel, and the second limiting portion extends inward from the inner circumferential wall of the sliding channel along the radial direction of the sliding channel. When the sliding valve core is located in the first position, the sliding valve core abuts against the second limiting portion.

[0024] In this solution, when the sliding valve core slides from the second position to the first position, the second limiting portion can limit the sliding valve core to prevent the sliding valve core from accidentally slipping out of the sliding channel under the elastic force of the second elastic member.

[0025] Preferably, the movable valve core comprises a bottom wall and an annular side wall, wherein the side wall is used to abut against the sliding valve core when the movable valve core moves toward the first limiting portion, and causes the sliding valve core to slide from the first position to the second position;

[0026] The bottom wall is provided with one of a guide sleeve and a guide rod, the first limiting portion is provided with the other of the guide sleeve and the guide rod, and the guide sleeve is sleeved on the outer peripheral wall of the guide rod;

[0027] The first elastic member is sleeved on the outer circumference of the guide rod and the guide sleeve, and two ends of the first elastic member are respectively in contact with the bottom wall and the first limiting portion.

[0028] In this solution, the bottom wall is used to abut against one end of the first elastic member, so that the movable valve core can compress the first elastic member when moving toward the first limiting portion; the annular side wall is conducive to maintaining the stability of the movable valve core during the movement, and the setting of the side wall is convenient for abutting against the sliding valve core, so that the sliding valve core can slide from the first position to the second position; a guide sleeve and a guide rod are provided between the bottom wall and the first limiting portion, which have a good guiding effect on the movement of the movable valve core, so that the movable valve core can move more accurately along the axial direction of the first bypass path during the movement to avoid offset.

[0029] Preferably, the bottom wall is provided with a plurality of first water holes, and the plurality of first water holes are evenly arranged along the circumference of the bottom wall;

[0030] The first limiting portion is provided with a plurality of second water holes, and the plurality of second water holes are evenly arranged along the circumference of the first limiting portion.

[0031] In this solution, the setting of the first water hole in the bottom wall facilitates the water flow in the water inlet channel to flow evenly into the first bypass channel, and at the same time makes the driving force of the water flow on the moving valve core more uniform; the setting of the second water hole in the first limiting part enables the water flow in the first bypass channel to flow out more evenly into the water outlet channel.

[0032] Preferably, a step portion is provided at one end of the first bypass passage that is connected to the water inlet passage, and the step portion extends inward from the inner circumferential wall of the first bypass passage along the radial direction of the first bypass passage. When the movable valve core is in the initial position, the bottom wall abuts against the step portion, and the first water hole is connected to the water inlet passage.

[0033] In this solution, the setting of the step portion can limit the movable valve core. The movable valve core is limited in the first bypass passage by the first limiting portion, the first elastic member and the step portion to prevent the movable valve core from accidentally slipping out of the first bypass passage. At the same time, it ensures that the first water hole and the water inlet channel are in a connected state.

[0034] A gas water heater comprising a water inlet pipe, a heat exchanger and a water outlet pipe, the gas water heater also comprising the aforementioned bypass valve;

[0035] 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;

[0036] 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.

[0037] In this solution, when the user turns off the hot water after using the gas water heater, due to the certain thermal inertia of the heat exchanger, the heat will continue to conduct to the water inside the heat exchanger, causing the temperature of this part of the water to be too high and flow into the outlet pipe. The gas water heater is provided with the above-mentioned bypass valve, so that 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 a temperature in the hot water pipe, avoiding the user from feeling uncomfortable or even being scalded when turning on the hot water again, and solving the problem of temperature rise when the water supply is cut off; at the same time, when cold water is not introduced into the bypass valve, the sliding valve core is in the first position, at this time the opening degree of the second bypass passage is the largest, the total bypass flow of the bypass valve is the largest, and the cold water flow out to the outlet pipe is the largest, which can better The hot water with excessively high temperature in the outlet pipe is neutralized on the ground, solving the problem of temperature rise when water is stopped. Afterwards, the water temperature in the outlet pipe is no longer too high, and the amount of cold water required for neutralization is gradually reduced. At this time, the bypass valve slides from the first position to the second position as the sliding valve core, and the opening of the second bypass passage gradually decreases, the total bypass flow of the bypass valve gradually decreases, and the amount of cold water flowing out to the outlet pipe gradually decreases, which is adapted to the amount of cold water required to neutralize the hot water, avoiding other problems caused by excessive bypass flow, such as excessive cold water flowing out directly without being heated, and water boiling caused by too small a flow through the heat exchanger; when water use is stopped, the first elastic member can push the movable valve core away from the first limit portion for reset, so as to facilitate subsequent reuse.

[0038] The positive progress effect of the present invention is:

[0039] 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 minimum bypass flow rate requirement. The bypass flow rate of the second bypass passage is adjustable and has strong applicability. When water flows into the water inlet passage, part of the water flows into the water outlet passage through the first bypass passage, and part of the water flows into the water outlet passage through the second bypass passage. At the same time, under the continuous action of the water flow pressure, the movable valve core moves toward the first limiting part. During this process, the first elastic member abutting between the movable valve core and the first limiting part is compressed and deformed. At the same time, during the movement of the movable valve core, it can squeeze the part of the sliding valve core located in the first bypass passage, so that the sliding valve core slides from the first position to the second position. The second elastic member abutting between the sliding valve core and the side wall of the sliding passage away from the first bypass passage is compressed and deformed. When the sliding valve core is in the first position, the opening of the second bypass passage is large. When the sliding valve core slides to the second position, the sliding valve core is pressed against the second bypass passage. The blocking area of ​​the passage gradually increases, that is, the opening of the second bypass passage gradually decreases; when the water flow in the water inlet channel decreases, under the action of the elastic force of the first elastic member, the movable valve core moves in the direction away from the first limit portion, and then under the action of the elastic force of the second elastic member, the sliding valve core can be reset from the second position to the first position, and the opening of the second bypass passage changes from small to large; through the above-mentioned structural setting, the bypass valve can adjust the total bypass flow of the bypass valve on the basis of ensuring the minimum bypass flow, the stability of the bypass flow control is strong, and the failure risk of the bypass valve is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 The figure is a schematic diagram of the three-dimensional structure of a gas water heater according to an embodiment of the present invention.

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

[0042] Figure 3 Schematic diagram of the exploded structure of a bypass valve according to an embodiment of the present invention (the valve body is not shown).

[0043] Figure 4 FIG. 1 is a schematic diagram of a partial cross-sectional structure of a bypass valve according to an embodiment of the present invention.

[0044] Figure 5 Schematic diagram of the cross-sectional structure of a bypass valve according to an embodiment of the present invention (the sliding valve core is located in the first position).

[0045] Figure 6 Schematic diagram of the cross-sectional structure of a bypass valve according to an embodiment of the present invention (the sliding valve core is located in the second position).

[0046] Description of reference numerals:

[0047] Gas water heater 200

[0048] Water inlet pipe 201

[0049] Heat exchanger 202

[0050] Outlet pipe 203

[0051] Fume hood 204

[0052] Combustion chamber 205

[0053] Gas distribution system 206

[0054] Fan 207

[0055] Electronic controller 208

[0056] Bypass valve 100

[0057] Valve body 1

[0058] Water inlet channel 11

[0059] First water inlet 111

[0060] First water outlet 112

[0061] Water outlet channel 12

[0062] Second water inlet 121

[0063] Second water outlet 122

[0064] The first bypass passage 13

[0065] Second bypass passage 14

[0066] Sliding channel 15

[0067] Step 16

[0068] Limiting slot 151

[0069] The second limiting portion 152

[0070] Moving spool 2

[0071] Guide groove 21

[0072] Bottom wall 22

[0073] First water hole 221

[0074] Side wall 23

[0075] Guide sleeve 24

[0076] Sliding valve core 3

[0077] Guide portion 31

[0078] First elastic member 4

[0079] Second elastic member 5

[0080] First limiting portion 6

[0081] Second water hole 61

[0082] Guide rod 7 DETAILED DESCRIPTION

[0083] The present invention will be described more clearly and completely below by way of embodiments in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments.

[0084] like Figure 1 As shown, this embodiment provides a gas water heater 200, including a water inlet pipe 201, a heat exchanger 202 and a water outlet pipe 203. The gas water heater 200 also 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 connected to the water inlet pipe 201 and the water inlet end of 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 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 certain thermal inertia of the heat exchanger 202, the heat will continue to be transferred to the water inside the heat exchanger 202, causing the temperature of this part of the water to be too high and flow into the water outlet pipe 203. The gas water heater 200 is provided with a 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, which can neutralize the hot water with too high a temperature in the hot water pipe, avoiding the user from feeling uncomfortable or even being scalded when turning on the hot water again, thereby solving the problem of temperature rise when the water supply is cut off.

[0085] Specifically, the gas water heater 200 also includes a gas distribution system 206, a combustion chamber 205 and a smoke collection hood 204. The gas distribution system 206 provides a gas source for the combustion of gas in the combustion chamber 205, and the smoke collection hood 204 is used to collect and discharge the exhaust gas generated by the gas combustion; the gas water heater 200 also includes a fan 207, which is used to introduce airflow into the combustion chamber 205 to improve the combustion efficiency of the gas; in addition, the gas water heater 200 also includes an electronic controller 208, which controls the gas and water circuits of the gas water heater 200 through the electronic controller 208.

[0086] like Figures 2 to 6As shown, the bypass valve 100 includes a valve body 1, the valve body 1 is provided with a water inlet channel 11 and a water outlet channel 12, the water inlet channel 11 and the water outlet channel 12 are connected with a first bypass channel 13 and a second bypass channel 14, the bypass valve 100 also includes a movable valve core 2, a sliding valve core 3, a first elastic member 4 and a second elastic member 5; the end of the first bypass channel 13 connected to the water outlet channel 12 is provided with a first limiting portion 6, the first limiting portion 6 is fixedly connected to the valve body 1, and the end of the first bypass channel 13 connected to the water inlet channel 11 is provided with a first limiting portion 6. The end of the first elastic member 4 is provided with a movable valve core 2, and the two ends of the first elastic member 4 are respectively in contact with the first limit portion 6 and the movable valve core 2; the valve body 1 is provided with a sliding channel 15, the sliding channel 15 is connected to the first bypass channel 13 and the second bypass channel 14, the sliding valve core 3 is provided in the sliding channel 15 and can slide along the axial direction of the sliding channel 15, and the two ends of the second elastic member 5 are respectively in contact with the sliding valve core 3 and the side wall 23 of the sliding channel 15 away from the first bypass channel 13; the sliding valve core 3 can be in the first position (such as Figure 5 ) and the second position (as shown in Figure 6 , when the sliding valve core 3 is located in the first position, the sliding valve core 3 is partially located in the first bypass passage 13, and the movable valve core 2 is used to squeeze the sliding valve core 3 in the process of moving toward the first limit portion 6 to make the sliding valve core 3 slide from the first position to the second position.

[0087] 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, which can ensure the minimum bypass flow requirement. The bypass flow of the second bypass passage 14 is adjustable and has strong applicability. When water flows into the water inlet channel 11, part of the water flows into the water outlet channel 12 through the first bypass passage 13, and part of the water flows into the water outlet channel 12 through the second bypass passage 14. At the same time, under the continuous action of water flow pressure, the movable valve core 2 moves toward the first limit part 6. During this process, the first elastic member 4 abutting between the movable valve core 2 and the first limit part 6 is compressed and deformed. At the same time, during the movement of the movable valve core 2, it can squeeze the part of the sliding valve core 3 located in the first bypass passage 13, so that the sliding valve core 3 slides from the first position to the second position, and the second elastic member 5 abutting between the sliding valve core 3 and the side wall 23 of the sliding channel 15 away from the first bypass passage 13 is compressed and deformed; when the sliding valve core 3 is in the first position, the opening of the second bypass passage 14 is larger, and when the sliding valve core 3 slides to the second position, the sliding valve core 3 opens the second bypass passage 14. The blocking area of ​​the passage 14 gradually increases, that is, the opening of the second bypass passage 14 gradually decreases; when the water flow of the water inlet channel 11 decreases, under the action of the elastic force of the first elastic member 4, the movable valve core 2 moves in the direction away from the first limit portion 6, and then under the action of the elastic force of the second elastic member 5, the sliding valve core 3 can be reset from the second position to the first position, and the opening of the second bypass passage 14 changes from small to large; through the above-mentioned structural setting, the bypass valve 100 can adjust the total bypass flow of the bypass valve 100 on the basis of ensuring the minimum bypass flow, the stability of the bypass flow control is strong, and the failure risk of the bypass valve 100 is low.

[0088] In this embodiment, when the sliding valve core 3 is in the first position, the second bypass passage 14 is connected over a large area. When the sliding valve core 3 is in the second position, the movable valve core 2 is pressed against the sliding valve core 3, completely blocking the second bypass passage 14. When the movable valve core 2 is not in contact with the sliding valve core 3 or has just made contact with the sliding valve core 3, the sliding valve core 3 is in the first position. At this time, the sliding valve core 3 only partially blocks the second bypass passage 14, resulting in a large connected area and a large opening of the second bypass passage 14. When the movable valve core 2 has pressed the sliding valve core 3 into place, the sliding valve core 3 is in the second position. The sliding valve core 3 completely blocks the second bypass passage 14, and the opening of the second bypass passage 14 is zero. The squeezing process of the movable valve core 2 against the sliding valve core 3 facilitates the control of the opening of the second bypass passage 14. In other optional embodiments, it can also be set as follows: when the sliding valve core 3 is in the first position, the second bypass passage 14 is fully connected, and the sliding valve core 3 does not form any blockage on the second bypass passage 14, so that the opening of the second bypass passage 14 reaches the maximum value.

[0089] In this embodiment, the first elastic member 4 is a thermosensitive spring, and the elastic force of the first elastic member 4 decreases as the temperature of the water flowing through it decreases. When the user turns off the faucet during a shower, due to the thermal inertia of the heat exchanger 202, heat will continue to be transferred to the water inside the heat exchanger 202, causing the water temperature in this area to be too high. When the faucet is turned on again, the temperature of the water in the water outlet channel 12 is initially high. When the water temperature is high, the elastic force of the first elastic member 4 is greater. At this time, the water flow in the water inlet channel 11 is difficult to push the movable valve core 2 toward the first limit portion 6. The sliding valve core 3 is in the first position, the second bypass channel 14 is opened to the maximum, and the flow of cold water from the water inlet channel 11 through the first bypass channel 13 and the second bypass channel 14 into the water outlet channel 12 is the largest, so as to better neutralize the hot water in the water outlet channel 12. As the excessively high temperature water flows out, the temperature of the water flowing through the water outlet channel 12 gradually decreases. At this time, the elastic force of the first elastic member 4 decreases, and the water flow entering the first bypass channel 13 can push the movable valve core 2 toward the first limit portion 6. During the movement, the sliding valve core 3 is squeezed and the sliding valve core 3 is gradually slid from the first position to the second position. The flow of cold water from the water inlet channel 11 through the first bypass channel 13 and the second bypass channel 14 into the water outlet channel 12 gradually decreases to adapt to the situation where the flow of cold water required to neutralize the hot water in the water outlet channel 12 is continuously decreasing.

[0090] In other optional embodiments, the relationship between the magnitude of the elastic force of the first elastic member 4 under high-temperature water flow and the pressure of the water flow in the first bypass passage 13 can be set according to actual conditions, thereby facilitating the adjustment of the initial movement time and movement speed of the movable valve core 2.

[0091] Specifically, in this embodiment, the first limiting portion 6 is a circular plate with a plurality of through holes (i.e., the second water holes 61), the second elastic member 5 is a spring, the outer diameter of the first limiting portion 6 is adapted to the inner diameter of the first bypass passage 13, and the first limiting portion 6 is fixedly connected to one end of the first bypass passage 13 connected to the water outlet channel 12 and is located inside the first bypass passage 13.

[0092] In this embodiment, a guide portion 31 is provided at one end of the sliding valve core 3 close to the first bypass passage 13, and the diameter of the guide portion 31 gradually increases from the end surface facing the first bypass passage 13 to the direction away from the first bypass passage 13; a guide groove 21 is provided on the outer peripheral wall of the movable valve core 2 close to the sliding valve core 3, and the guide groove 21 extends along the axial direction of the movable valve core 2, and the shape of the guide groove 21 is adapted to the shape of the guide portion 31; the guide groove 21 is used to abut against the guide portion 31 during the process of the movable valve core 2 moving toward the first limit portion 6, and to make the sliding valve core 3 slide from the first position to the second position. When the sliding valve core 3 is in the first position, part of it is located in the first bypass passage 13, and this part is provided with a guide portion 31. The diameter of the guide portion 31 gradually increases from the end surface facing the first bypass passage 13 to the direction away from the first bypass passage 13, thereby forming an inclined guide surface. Correspondingly, the outer peripheral wall of the movable valve core 2 is provided with a guide groove 21. In the process of the movable valve core 2 moving toward the first limit portion 6, the guide groove 21 abuts against the guide portion 31, and enables the sliding valve core 3 to gradually slide from the first position to the second position.

[0093] Specifically, in this embodiment, the guide groove 21 has an arc-shaped section to better match the guide portion 31. At the same time, the guide groove 21 extends a certain distance along the axial direction of the movable valve core 2. This ensures that the movable valve core 2 does not immediately contact the guide portion 31 during the initial movement, so that a larger bypass flow can be maintained for a period of time to better neutralize the hot water in the water outlet channel 12.

[0094] In this embodiment, the sliding channel 15 extends radially along the second bypass passage 14 and penetrates the second bypass passage 14. A limiting groove 151 is formed at the end of the sliding channel 15 away from the first bypass passage 13. The two ends of the second elastic member 5 abut the sliding valve core 3 and the limiting groove 151, respectively. The sliding channel 15 extends radially along the second bypass passage 14, facilitating the sliding of the sliding valve core 3, allowing the sliding valve core 3 to slide from the first position to the second position using a relatively short sliding path. The provision of the limiting groove 151 helps improve the installation stability of the second elastic member 5 and facilitates the sliding valve core 3 to be partially located within the limiting groove 151 when the sliding valve core 3 slides to the second position, thereby improving the stability of the sliding valve core 3.

[0095] In this embodiment, a second stopper 152 is provided at one end of the sliding channel 15 proximate to the first bypass channel 13. The second stopper 152 extends radially inward from the inner circumferential wall of the sliding channel 15. When the sliding valve core 3 is in the first position, the sliding valve core 3 abuts against the second stopper 152. After the sliding valve core 3 slides from the second position to the first position, the second stopper 152 serves to limit the sliding valve core 3, preventing the sliding valve core 3 from accidentally slipping out of the sliding channel 15 due to the elastic force of the second elastic member 5.

[0096] In this embodiment, the movable valve core 2 includes a bottom wall 22 and an annular side wall 23. The side wall 23 is used to abut against the sliding valve core 3 during the movement of the movable valve core 2 toward the first limiting portion 6, and to make the sliding valve core 3 slide from the first position to the second position; the bottom wall 22 is provided with a guide sleeve 24 and one of the guide rods 7, and the first limiting portion 6 is provided with a guide sleeve 24 and the other of the guide rods 7, and the guide sleeve 24 is sleeved on the outer peripheral wall of the guide rod 7; the first elastic member 4 is sleeved on the outer peripheral side of the guide rod 7 and the guide sleeve 24, and the two ends of the first elastic member 4 abut against the bottom wall 22 and the first limiting portion 6 respectively. The bottom wall 22 is used to abut against one end of the first elastic member 4, so that the movable valve core 2 can compress the first elastic member 4 when moving toward the first limiting portion 6; the annular side wall 23 is conducive to maintaining the stability of the movable valve core 2 during the movement, and the setting of the side wall 23 is convenient for abutting against the sliding valve core 3, so that the sliding valve core 3 can slide from the first position to the second position; a guide sleeve 24 and a guide rod 7 are provided between the bottom wall 22 and the first limiting portion 6, which have a good guiding effect on the movement of the movable valve core 2, so that the movable valve core 2 can move more accurately along the axial direction of the first bypass passage 13 during the movement to avoid offset.

[0097] Specifically, in this embodiment, the side wall 23, the bottom wall 22 and the guide sleeve 24 are integrally formed, and an annular abutment groove is formed between the side wall 23, the bottom wall 22 and the guide sleeve 24. One end of the first elastic member 4 abuts in the abutment groove. The formation of the abutment groove makes the abutment of the bottom wall 22 to the first elastic member 4 more stable, avoiding the displacement of the first elastic member 4 during the compression deformation process; at the same time, the first limiting portion 6 and the guide rod 7 are integrally formed, which further improves the stability of the structure and can improve the assembly efficiency.

[0098] In this embodiment, the bottom wall 22 is provided with a plurality of first water holes 221, which are evenly distributed along the circumference of the bottom wall 22. The first limiting portion 6 is provided with a plurality of second water holes 61, which are evenly distributed along the circumference of the first limiting portion 6. The provision of the first water holes 221 in the bottom wall 22 facilitates the uniform flow of water in the water inlet channel 11 into the first bypass channel 13, while also making the driving force of the water flow on the movable valve core 2 more uniform. The provision of the second water holes 61 in the first limiting portion 6 allows the water in the first bypass channel 13 to flow out into the water outlet channel 12 more evenly.

[0099] In this embodiment, a step portion 16 is provided at one end of the first bypass passage 13 that communicates with the water inlet passage 11. The step portion 16 extends radially inward from the inner circumferential wall of the first bypass passage 13. When the movable valve core 2 is in its initial position, the bottom wall 22 abuts the step portion 16, and the first water passage 221 communicates with the water inlet passage 11. The provision of the step portion 16 serves to limit the position of the movable valve core 2. The first limiting portion 6, the first elastic member 4, and the step portion 16 confine the movable valve core 2 within the first bypass passage 13, preventing the movable valve core 2 from accidentally slipping out of the first bypass passage 13. At the same time, the first water passage 221 is ensured to remain in communication with the water inlet passage 11.

[0100] 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 cold water is not introduced into the bypass valve 100, the sliding valve core 3 is in the first position, at this time the opening degree of the second bypass passage 14 is the largest, the total bypass flow of the bypass valve 100 is the largest, and the cold water flow outflowing to the water outlet pipe 203 is the largest, which can better neutralize the hot water with too high a temperature in the water outlet pipe 203 and solve the problem of temperature rise when the water is stopped. After that, the water temperature in the water outlet pipe 203 is no longer too high, and the amount of cold water required for neutralization is gradually reduced. When the bypass valve 100 slides from the first position to the second position as the sliding valve core 3, the opening 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 to the outlet pipe 203 gradually decreases, which is adapted to the amount of cold water required to neutralize the hot water, thereby avoiding other problems caused by excessive bypass flow, such as excessive cold water flowing out directly without being heated, and too little water flow through the heat exchanger 202 causing water boiling, etc.; when water use is stopped, the first elastic member 4 can push the movable valve core 2 away from the first limit portion 6 for reset to facilitate subsequent reuse.

[0101] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the 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 channel and a water outlet channel, the water inlet channel and the water outlet channel are connected with a first bypass channel and a second bypass channel, and the bypass valve further comprises a movable valve core, a sliding valve core, a first elastic member and a second elastic member; A first limiting portion is provided at one end of the first bypass passage connected to the water outlet passage, the first limiting portion being fixedly connected to the valve body, and the movable valve core is provided at one end of the first bypass passage connected to the water inlet passage, with both ends of the first elastic member respectively abutting against the first limiting portion and the movable valve core; The valve body is provided with a sliding channel, the sliding channel being connected to the first bypass channel and the second bypass channel, the sliding valve core being provided in the sliding channel and being able to slide along the axial direction of the sliding channel, and the two ends of the second elastic member respectively abutting against the sliding valve core and a side wall of the sliding channel away from the first bypass channel; The sliding valve core is capable of sliding between a first position and a second position in the sliding channel. When the sliding valve core slides from the first position to the second position, the opening of the second bypass passage gradually decreases. When the sliding valve core slides from the second position to the first position, the opening of the second bypass passage gradually increases. When the sliding valve core is located at the first position, the sliding valve core is partially located in the first bypass passage, and the movable valve core is used to squeeze the sliding valve core during the movement toward the first limiting portion so that the sliding valve core slides from the first position to the second position.

2. The bypass valve according to claim 1, wherein: When the sliding valve core is located at the first position, the second bypass passage is fully connected; When the sliding valve core is located at the second position, the movable valve core is pressed against the sliding valve core, and the sliding valve core completely blocks the second bypass passage.

3. The bypass valve according to claim 1, wherein: The first elastic member is a thermally sensitive spring, and the elastic force of the first elastic member decreases as the temperature of the water flowing through the first elastic member decreases.

4. The bypass valve according to claim 1, wherein: A guide portion is provided at one end of the sliding valve core close to the first bypass passage, wherein the diameter of the guide portion gradually increases from the end surface facing the first bypass passage toward the direction away from the first bypass passage; A guide groove is provided on the outer peripheral wall of the movable valve core close to the sliding valve core, the guide groove extends along the axial direction of the movable valve core, and the shape of the guide groove is adapted to the shape of the guide portion; The guide groove is used to abut against the guide portion during the process of the movable valve core moving toward the first limiting portion, and to enable the sliding valve core to slide from the first position to the second position.

5. The bypass valve according to claim 1, wherein: The sliding channel extends radially along the second bypass channel and penetrates the second bypass channel. A limiting groove is formed at one end of the sliding channel away from the first bypass channel. Two ends of the second elastic member respectively abut against the sliding valve core and the limiting groove.

6. The bypass valve according to claim 1, wherein: A second limiting portion is provided at one end of the sliding channel close to the first bypass channel, and the second limiting portion extends inward from the inner peripheral wall of the sliding channel along the radial direction of the sliding channel. When the sliding valve core is located at the first position, the sliding valve core abuts against the second limiting portion.

7. The bypass valve according to claim 1, wherein: The movable valve core comprises a bottom wall and an annular side wall, wherein the side wall is used to abut against the sliding valve core when the movable valve core moves toward the first limiting portion, and to slide the sliding valve core from the first position to the second position; The bottom wall is provided with one of a guide sleeve and a guide rod, the first limiting portion is provided with the other of the guide sleeve and the guide rod, and the guide sleeve is sleeved on the outer peripheral wall of the guide rod; The first elastic member is sleeved on the outer circumference of the guide rod and the guide sleeve, and two ends of the first elastic member are respectively in contact with the bottom wall and the first limiting portion.

8. The bypass valve according to claim 7, wherein: The bottom wall is provided with a plurality of first water holes, and the plurality of first water holes are evenly arranged along the circumference of the bottom wall; The first limiting portion is provided with a plurality of second water holes, and the plurality of second water holes are evenly arranged along the circumference of the first limiting portion.

9. The bypass valve according to claim 8, wherein: A step portion is provided at one end of the first bypass passage that is connected to the water inlet passage. The step portion extends inwardly from the inner circumferential wall of the first bypass passage along the radial direction of the first bypass passage. When the movable valve core is in the initial position, the bottom wall abuts against the step portion, and the first water hole is connected to the water inlet passage.

10. A gas water heater comprising a water inlet pipe, a heat exchanger and a water outlet pipe, characterized in that: The gas water heater further comprises a bypass valve according to any one of claims 1 to 9; 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; 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.

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