By-pass valve and water heater comprising same

Abstract

The present application relates to the field of water heaters, in particular to a bypass valve and a water heater comprising the same. The bypass valve comprises a valve body, a water inlet channel, a water outlet channel and a bypass channel are arranged in the valve body, the bypass channel is communicated with the water inlet channel and the water outlet channel; the bypass valve further comprises a valve core assembly, the valve core assembly comprises an inner liner support, a flow limiting cover, a rotor and a transmission part; the inner liner support and the flow limiting cover are arranged in the bypass channel, the periphery of the inner liner support and / or the periphery of the flow limiting cover is provided with a flow hole communicated with the water inlet channel and the water outlet channel, the flow limiting cover and the inner liner support can relatively slide to adjust the opening degree of the flow hole. The water heater of the present application can adaptively adjust the water quantity of cold water in the water temperature rise when the water stops, and improve the user experience.

Description

TECHNICAL FIELD

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

[0002] A water heater is a common stove for heating water. Cold water flows into the heat exchanger of the water heater from the water inlet pipe, and the water is heated by the heat exchanger and then flows out through the water outlet pipe for the user to use.

[0003] During the use of hot water by the user, if the user closes the valve to stop using water, the water in the heat exchanger stops flowing. Because the heat exchanger has a certain thermal inertia, the heat stored in the heat exchanger continues to conduct to the water inside the heat exchanger after the fire is turned off, causing the temperature of this part of the water to be too high, resulting in a temperature rise during water stop. When the user turns on the valve to use water again, the user may feel uncomfortable due to the high-temperature water.

[0004] At present, a bypass pipe is connected between the inlet and outlet pipes inside the water heater, so that part of the cold water does not flow through the heat exchanger and directly flows to the water outlet pipe of the water heater through the bypass pipe, and this part of the cold water is used to neutralize the hot water caused by the temperature rise during water stop. The conventional bypass pipe is a flow passage with a fixed flow passage cross section, and the bypass flow cannot be adjusted, so that the outlet water temperature cannot be controlled. SUMMARY

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

[0006] The present application solves the above technical problems by the following technical solutions:

[0007] According to a first aspect of the present application, a bypass valve is provided, the bypass valve comprising a valve body, the valve body being provided with a water inlet passage, a water outlet passage and a bypass passage, the bypass passage being connected to the water inlet passage and the water outlet passage at the same time;

[0008] The bypass valve further comprises a valve core assembly, the valve core assembly comprising an inner liner support, a flow limiting cover, a rotor and a transmission member; the inner liner support and the flow limiting cover are both arranged in the bypass passage, the peripheral side of the inner liner support and / or the peripheral side of the flow limiting cover is provided with a flow hole communicating the water inlet passage and the water outlet passage, the flow limiting cover and the inner liner support can slide relative to each other to adjust the opening degree of the flow hole;

[0009] The rotor can rotate under the impact of water flow; the transmission member is engaged with the rotor and the flow limiting cover, and the transmission member is used to convert the rotation of the rotor into the sliding of the flow limiting cover relative to the inner liner support.

[0010] In the present scheme, cold water flows into the water inlet channel, hot water flows out of the water outlet channel, and the bypass channel is communicated with the water inlet channel and the water outlet channel, so that the cold water can flow into the water outlet channel from the bypass channel after being adjusted by the valve core assembly to neutralize the water temperature in the water outlet channel. Wherein, the rotor rotates under the action of water flow, and the transmission member converts the rotation of the rotor into the relative sliding of the flow limiting cover relative to the inner liner support. When the flow limiting cover slides relative to the inner liner support, the degree of shielding of the flow hole can be adjusted, thereby changing the opening of the flow hole and adjusting the flow of cold water from the water inlet channel into the water outlet channel. When the water outlet channel starts to discharge water, the cold water in the water inlet channel can enter the water outlet channel from the bypass channel. At this time, the rotor rotates under the impact of water flow, so that the flow limiting cover slides relative to the inner liner support to change the opening of the flow hole, so that as the water outlet channel continues to discharge hot water, the flow rate of the bypass channel gradually changes to meet the neutralization needs of hot water.

[0011] Preferably, the transmission member includes a threaded rod, the axis direction of the threaded rod is parallel to the sliding direction of the flow limiting cover relative to the inner liner support; the flow limiting cover is provided with a threaded hole, and the flow limiting cover is fixed circumferentially to the inner liner support; the threaded rod is coaxially connected to the rotor, and the threaded rod is matched with the threaded hole.

[0012] In the present scheme, the transmission member includes a threaded rod, the threaded rod is connected to the rotor, so that when the rotor rotates, the threaded rod can be driven to rotate; the axis direction of the threaded rod is parallel to the sliding direction of the flow limiting cover relative to the inner liner support; the threaded rod is matched with the threaded hole on the flow limiting cover, and the flow limiting cover is fixed circumferentially to the inner liner support, so that when the threaded rod rotates, the threaded rod is screwed into the threaded hole, and the flow limiting cover slides along the axis direction of the threaded rod, thereby realizing the conversion of the rotation of the rotor into the sliding of the flow limiting cover relative to the inner liner support.

[0013] Preferably, the flow limiting cover includes a flow limiting cover body and a connecting portion, the connecting portion is arranged at one end of the flow limiting cover body in the sliding direction of the flow limiting cover relative to the inner liner support, and the end of the flow limiting cover body is inwardly protruded to form the connecting portion, and the threaded hole is arranged in the connecting portion.

[0014] In the present scheme, the connecting portion is arranged at one end of the flow limiting cover body and protrudes inwardly, and the threaded hole is arranged in the connecting portion, so that the threaded hole can have a larger hole depth, and the cooperation between the threaded rod and the threaded hole is more reliable.

[0015] Preferably, the flow limiting cover body is sleeved on the outer circumferential side of the inner liner support, and the connecting portion is arranged at one end of the flow limiting cover body away from the inner liner support.

[0016] In the scheme, the flow limiting cover body is sleeved on the outer circumferential side of the inner liner support, so that the flow limiting cover cooperates better with the inner liner support, the adjustment effect on the water flow is better, and meanwhile, only the end of the flow limiting cover away from the inner liner support is provided with a bottom surface, and the end of the inner liner support facing the flow limiting cover can be provided without a bottom surface. The connecting part is arranged at the end of the flow limiting cover body away from the inner liner support, so that the flow limiting cover can slide relative to the inner liner support to partially overlap the inner liner support to shield the overflow hole.

[0017] Preferably, the overflow hole is arranged on the circumferential side of the inner liner support.

[0018] In the scheme, the overflow hole is arranged on the circumferential side of the inner liner support, compared with the arrangement of the overflow hole on the circumferential side of the flow limiting cover, the arrangement can avoid the influence of the connecting part in the flow limiting cover on the opening of the overflow hole.

[0019] Preferably, the flow limiting cover is arranged at the end of the inner liner support away from the rotor, and the threaded rod passes through the inner liner support to be connected with the flow limiting cover.

[0020] In the scheme, the flow limiting cover is arranged at the end of the inner liner support away from the rotor, and the threaded rod passes through the inner liner support to be connected with the flow limiting cover, so that the overall structure of the valve core assembly is more compact, and the space layout is more reasonable.

[0021] Preferably, the circumferential side of one of the flow limiting cover and the inner liner support is provided with a circumferential limiting groove, the extension direction of the circumferential limiting groove is parallel to the sliding direction of the flow limiting cover relative to the inner liner support, and the circumferential side of the other one of the flow limiting cover and the inner liner support is provided with a circumferential limiting block matched with the circumferential limiting groove, the circumferential limiting block abuts against the side wall of the circumferential limiting groove and can slide along the length direction of the circumferential limiting groove.

[0022] In the scheme, the circumferential limiting block is inserted into the circumferential limiting groove, the side wall of the circumferential limiting groove limits the circumferential limiting block, so that the flow limiting cover cannot rotate circumferentially relative to the inner liner support; the axial limiting block can slide along the length direction of the circumferential limiting groove, so that the flow limiting cover can slide axially relative to the inner liner support.

[0023] Preferably, the overflow hole is a long strip-shaped hole, and the length direction of the overflow hole is parallel to the sliding direction of the flow limiting cover relative to the inner liner support.

[0024] In the scheme, the overflow hole is a long strip-shaped hole, and the length direction of the overflow hole is parallel to the sliding direction of the flow limiting cover relative to the inner liner support, so that when the flow limiting cover slides relative to the inner liner support, the opening degree of the overflow hole changes more stably, and the control precision during flow regulation is improved.

[0025] Preferably, the minimum flow area of the bypass channel is less than 1 / 3 times the total maximum flow area of the overflow hole.

[0026] In the present solution, the minimum flow area of the bypass passage is less than 1 / 3 of the total maximum flow area of the flow holes, so that when the water outlet passage just starts to output hot water, the bypass passage keeps the maximum flow rate to provide enough cold water to neutralize the hot water; as the water outlet passage continues to output water, the opening degree of the flow holes gradually decreases, and when the opening degree of the flow holes is less than 1 / 3 of the total maximum flow area of the flow holes, the water flow of the bypass passage starts to decrease to adapt to the water temperature requirement of the water outlet passage after a period of water output.

[0027] Preferably, the rotor is arranged in the water outlet passage.

[0028] In the present solution, the rotor is arranged in the water outlet passage, so that when the water outlet passage starts to output water, the rotor can immediately start to rotate under the impact of the water flow in the water outlet passage, making the adjustment of the bypass valve more sensitive.

[0029] Preferably, the valve core assembly further comprises an elastic reset member; the elastic reset member abuts against the flow limiting cover, and the elastic reset member is used to apply a force to the flow limiting cover in a direction away from the inner liner support.

[0030] In the present solution, the elastic reset member abuts against the flow limiting cover, and when the water outlet passage stops outputting water, the rotor stops rotating, and the elastic reset member drives the flow limiting cover to move in a direction away from the inner liner support to reset the flow limiting cover.

[0031] Preferably, the elastic reset member comprises a compression spring arranged in the inner liner support, and opposite ends of the compression spring abut against the inner liner support and the flow limiting cover, respectively.

[0032] In the present solution, the elastic reset member comprises a compression spring arranged in the inner liner support and abutting against the inner liner support and the flow limiting cover, respectively. This arrangement is simple and reasonable, and makes full use of the space inside the inner liner support, so that the structure of the valve core assembly is compact, and the inner liner support can also guide the compression spring to deform in a direction parallel to the axial direction of the inner liner support.

[0033] According to the second aspect of the present application, a water heater is provided, which comprises the bypass valve as described above.

[0034] In the present solution, the water heater comprises the bypass valve, so that when the water heater is temporarily stopped, the water in the water heater is heated by the thermal inertia of the water heater to cause a temperature rise, and if the user starts to use hot water, cold water can enter the water outlet passage from the bypass passage to neutralize the hot water in the water outlet passage; as the hot water continues to be used, the rotor rotates under the action of the water flow to drive the flow limiting cover to move to decrease the opening degree of the flow holes, so that after the hot water with a temperature too high due to the temperature rise is discharged, the cold water entering the water outlet passage from the bypass passage decreases, thereby avoiding too much cold water to cause the water temperature to fail to meet the use requirement.

[0035] The positive progress effect of the present application is that:

[0036] The present application adjusts the degree of shielding of the overflow hole when the flow-limiting cover slides relative to the inner liner support, thereby changing the opening degree of the overflow hole, adjusting the flow of cold water from the water inlet channel into the water outlet channel. Thus, as the water outlet channel continuously discharges hot water, the bypass channel flow gradually changes to adapt to the neutralization needs of the hot water, so that the water temperature of the outlet is stable. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 Structure diagram of a water heater according to an embodiment of the present application.

[0038] Figure 2 Structure diagram of a bypass valve according to an embodiment of the present application.

[0039] Figure 3 Structure diagram of a bypass valve according to an embodiment of the present application.

[0040] Figure 4 Structure diagram of a valve core assembly according to an embodiment of the present application.

[0041] Figure 5 Structure diagram of a valve core assembly according to an embodiment of the present application.

[0042] Explanation of reference signs:

[0043] Water heater 100

[0044] Water heater body 200

[0045] Combustion chamber 210

[0046] Heat exchanger 220

[0047] Water inlet pipe 300

[0048] Water outlet pipe 400

[0049] Bypass valve 500

[0050] Valve body 510

[0051] Valve core assembly 520

[0052] Inner liner support 521

[0053] Mounting portion 5211

[0054] Water blocking portion 5212

[0055] Overflow hole 5213

[0056] water outlet hole 5214

[0057] circumferential limiting groove 5215

[0058] flow-limiting cover 522

[0059] flow-limiting cover body 5221

[0060] connecting portion 5222

[0061] threaded hole 5223

[0062] circumferential limiting block 5224

[0063] rotor 523

[0064] transmission member 524

[0065] elastic return member 525

[0066] flow-blocking portion 526

[0067] water inlet hole 527

[0068] water inlet passage 530

[0069] water outlet passage 540

[0070] bypass passage 550 DETAILED DESCRIPTION

[0071] The present application will be further described below by way of examples, but the present application is not limited in its scope to the examples.

[0072] The present embodiment discloses a water heater 100, with reference to Figure 1 The water heater 100 comprises a water heater body 200, a water inlet pipe 300, a water outlet pipe 400 and a bypass valve 500. The water heater body 200 comprises a combustion chamber 210 and a heat exchanger 220, and gas is introduced into the combustion chamber 210 to be combusted. The water inlet pipe 300 and the water outlet pipe 400 are both connected to the heat exchanger 220, cold water flows into the heat exchanger 220 from the water inlet pipe 300, and the heat exchanger 220 is arranged in the combustion chamber 210 to exchange heat with water under the heating of the combustion chamber 210, and the heated hot water flows out from the water outlet pipe 400. The bypass valve 500 is connected between the water inlet pipe 300 and the water outlet pipe 400, and the cold water in the water inlet pipe 300 can flow into the water outlet pipe 400 through the bypass valve 500 to neutralize the hot water in the water outlet pipe 400.

[0073] When the user stops using water, the combustion chamber 210 stops heating. But at this time, the temperature of the heat exchanger 220 is still high, due to the thermal inertia of the heat exchanger 220, the heat exchanger 220 will continue to exchange heat with the water inside it for a period of time, so that the temperature of the water in this section is too high, causing the water temperature to rise. When the user uses hot water directly at this time, it is easy to cause discomfort and even scalding. In the embodiment, by flowing cold water in the water inlet pipe 300 into the water outlet pipe 400 through the bypass valve 500 to neutralize the hot water in the water outlet pipe 400, the water temperature of the water in this section due to the water temperature rise is reduced, and the user experience is improved.

[0074] It should be noted that the water heater 100 is not limited to the gas water heater 100 heated by gas combustion in the embodiment, and in other embodiments, the water heater 100 can also be an electric water heater 100 or other suitable water heater 100.

[0075] Referring to Figure 2 and Figure 3 The bypass valve 500 includes a valve body 510 and a valve core assembly 520. The valve body 510 is provided with a water inlet passage 530, a water outlet passage 540 and a bypass passage 550, and the bypass passage 550 is connected to the water inlet passage 530 and the water outlet passage 540. The valve core assembly 520 is arranged in the bypass passage 550 to adjust the opening degree of the bypass passage 550.

[0076] The one end of the water inlet passage 530 is connected with the water inlet pipe 300, and the other end is connected with the water inlet of the heat exchanger 220 through a pipe fitting. The one end of the water outlet passage 540 is connected with the water outlet pipe 400, and the other end is connected with the water outlet of the heat exchanger 220 through a pipe fitting. The bypass passage 550 is arranged between the water inlet passage 530 and the water outlet passage 540, and in the embodiment, the bypass passage 550 is a straight passage with a circular cross section.

[0077] Referring to Figures 3 to 5 , the valve core assembly 520 includes an inner liner support 521, a flow limiting cover 522, a rotor 523, a transmission member 524 and an elastic return member 525. The inner liner support 521 and the flow limiting cover 522 are arranged in the bypass passage 550. The inner liner support 521 is fixed to the valve body 510, the flow limiting cover 522 is engaged with the rotor 523 through the transmission member 524, and the flow limiting cover 522 can slide relative to the inner liner support 521 when the rotor 523 rotates. The elastic return member 525 abuts against the flow limiting cover 522, and the elastic return member 525 is used to apply a force to the flow limiting cover 522 in a direction away from the inner liner support 521.

[0078] The inner liner support 521 comprises a mounting portion 5211 and a water blocking portion 5212. The mounting portion 5211 is fixed in and blocks the bypass passage 550, and a water outlet hole 5214 is formed in the middle of the mounting portion 5211 for water flow.

[0079] The flow limiting cover 522 comprises a cylindrical flow limiting cover body 5221. The flow limiting cover body 5221 is sleeved outside the water blocking portion 5212 and can slide along the axis of the water blocking portion 5212. Thus, the flow limiting cover 522 cooperates with the inner liner support 521 to block the bypass passage 550. The circumferential side of the water blocking portion 5212 is provided with a flow hole 5213, and when the flow limiting cover body 5221 slides relative to the water blocking portion 5212, the flow limiting cover 522 can change the degree of blocking of the flow hole 5213, thereby changing the flow rate of the bypass passage 550.

[0080] In addition, in other embodiments, the flow limiting cover body 5221 can also be sleeved inside the water blocking portion 5212. In other embodiments, the flow limiting cover body 5221 can also only comprise one or more baffles that are attached to the surface of the water blocking portion 5212, and the baffles slide along the axis of the water blocking portion 5212 to block the flow hole 5213.

[0081] In one embodiment, the flow hole 5213 is formed in the circumferential side of the flow limiting cover body 5221, and the flow hole 5213 is blocked by the water blocking portion 5212 to change the flow rate of the bypass passage 550. In one embodiment, the flow hole 5213 is formed in both the circumferential side of the water blocking portion 5212 and the circumferential side of the flow limiting cover body 5221, and the flow rate of the bypass passage 550 is changed by changing the facing area of the flow hole 5213 on the water blocking portion 5212 and the flow limiting cover body 5221.

[0082] In this embodiment, the flow limiting cover body 5221 is fitted with the water blocking portion 5212, that is, the water blocking portion 5212 can be inserted into the flow limiting cover body 5221 and slides relative to the flow limiting cover body 5221. Thus, water flow can only flow into the water blocking portion 5212 from the flow hole 5213, thereby improving the control accuracy of the bypass valve 500.

[0083] The number of flow holes 5213 can be set according to actual needs, and in this embodiment, three flow holes 5213 are specifically shown.

[0084] In this embodiment, the flow holes 5213 are long strip-shaped holes, and the length direction of the flow holes 5213 is parallel to the sliding direction of the flow-limiting cover 522 relative to the inner liner support 521, so that when the flow-limiting cover 522 slides relative to the inner liner support 521, the opening degree of the flow holes 5213 changes more stably, and the control accuracy during flow adjustment is improved.

[0085] In this embodiment, the minimum flow area of the bypass passage 550 is less than 1 / 3 of the total maximum flow area of the flow holes 5213. The minimum flow area of the bypass passage 550 herein refers to the area of the smallest cross section of the bypass passage 550, and the total maximum flow area of the flow holes 5213 refers to the sum of the areas of all the flow holes 5213 when the flow holes 5213 are not blocked. Specifically, in this embodiment, the bypass passage 550 is provided with a flow blocking portion 526 on the side close to the water inlet passage 530, the flow blocking portion 526 blocks the bypass passage 550, and a plurality of water inlet holes 527 for water flow are formed on the flow blocking portion 526, and the total area of the plurality of water inlet holes 527 is the minimum flow area of the bypass passage 550.

[0086] When the water outlet passage 540 starts to outlet hot water, the temperature of the water flow is relatively high due to the water stop temperature rise of the water heater 100. At this time, although the flow-limiting cover 522 slides relative to the inner liner support 521 to reduce the opening degree of the flow holes 5213, the total flow area of the flow holes 5213 is still greater than the minimum flow area of the bypass passage 550, so that the bypass passage 550 maintains the maximum flow to provide sufficient cold water to neutralize the hot water. As the water outlet passage 540 continues to outlet water, the water with a relatively high temperature is discharged. The opening degree of the flow holes 5213 gradually decreases, and when the opening degree of the flow holes 5213 is less than 1 / 3 of the total maximum flow area of the flow holes 5213, the water flow of the bypass passage 550 starts to decrease to adapt to the water temperature requirement of the water outlet passage 540 after a period of water outlet.

[0087] Referring to Figures 3 to 5 In this embodiment, the rotor 523 is an impeller which can rotate under the impact of water flow.

[0088] In this embodiment, the rotor 523 is arranged in the water outlet passage 540, so that when the water outlet passage 540 starts to outlet water, the rotor 523 can immediately start to rotate under the impact of the water flow in the water outlet passage 540, so that the adjustment of the bypass valve 500 is more sensitive. In addition, in other embodiments, the rotor 523 can also be arranged in the water inlet passage 530 or the bypass passage 550.

[0089] In this embodiment, the rotation axis of the rotor 523 is parallel to the axis of the bypass passage 550, and in other embodiments, the rotor 523 can also adopt other arrangements.

[0090] In this embodiment, the transmission member 524 comprises a threaded rod, the axis of the threaded rod is parallel to the sliding direction of the flow restrictor 522 relative to the inner liner support 521, that is, in this embodiment, the axis of the threaded rod is parallel to the axial direction of the bypass passage 550. The flow restrictor 522 is provided with a threaded hole 5223, and the flow restrictor 522 is circumferentially fixed to the inner liner support 521. The threaded rod is coaxially connected to the rotor 523, and the threaded rod cooperates with the threaded hole 5223.

[0091] One end of the threaded rod is connected to the flow blocking portion 526, and the other end is connected to the rotor 523 through the mounting portion 5211. The threaded rod is fixed relative to the flow blocking portion 526 and the mounting portion 5211 in the axial direction thereof, and can rotate in the circumferential direction thereof.

[0092] When the water flow impacts the rotor 523 to make the rotor 523 rotate, the rotor 523 drives the threaded rod to rotate. The threaded rod cooperates with the threaded hole 5223 on the flow restrictor 522, and the flow restrictor 522 is circumferentially fixed to the inner liner support 521, so that when the threaded rod rotates, the threaded rod is screwed into the threaded hole 5223, driving the flow restrictor 522 to slide along the axial direction of the threaded rod towards the direction close to the rotor 523, thereby realizing the conversion of the rotation of the rotor 523 into the sliding of the flow restrictor 522 relative to the inner liner support 521, thereby reducing the opening of the overflow hole 5213 and reducing the flow rate of the bypass passage 550.

[0093] In addition, the transmission member 524 can also be other mechanisms capable of converting rotation into linear motion. For example, in other embodiments, the transmission member 524 can be a gear and rack assembly, by fixing a rack on the flow restrictor 522, the rotor 523 is engaged with a gear, and the gear meshes with the rack, so that when the rotor 523 rotates, the flow restrictor 522 is driven to slide linearly.

[0094] In this embodiment, the flow restrictor 522 is arranged at the end of the inner liner support 521 away from the rotor 523, and the threaded rod passes through the inner liner support 521 to connect with the flow restrictor 522, so that the overall structure of the spool assembly 520 is more compact, and the space layout is more reasonable.

[0095] In some preferred embodiments, the flow restrictor 522 further comprises a connecting portion 5222, which is arranged at one end of the flow restrictor body 5221 in the sliding direction of the flow restrictor 522 relative to the inner liner support 521, and the threaded hole 5223 is arranged in the connecting portion 5222, so that the threaded hole 5223 can have a larger hole depth, and the cooperation between the threaded rod and the threaded hole 5223 is more reliable.

[0096] Specifically, in the embodiment, the connecting portion 5222 is arranged at one end of the flow limiter body 5221 away from the inner liner support 521, so that the flow limiter 522 is better matched with the inner liner support 521 and has a better regulating effect on the water flow, and meanwhile, only the one end of the flow limiter 522 away from the inner liner support 521 is provided with a bottom surface, and the one end of the inner liner support 521 facing the flow limiter 522 can be provided without a bottom surface.

[0097] With reference to Figure 4 and Figure 5 In the embodiment, the water blocking portion 5212 is provided with a circumferential limiting groove 5215 on the outer circumferential side. The circumferential limiting groove 5215 is in a strip shape, and the extension direction of the circumferential limiting groove 5215 is parallel to the sliding direction of the flow limiter 522 relative to the inner liner support 521. The inner circumferential side of the flow limiter 522 is provided with a circumferential limiting block 5224 matched with the circumferential limiting groove 5215, and the circumferential limiting groove 5215 penetrates through the water blocking portion 5212 to the side of the flow limiter body 5221 for the insertion of the circumferential limiting block 5224. Along the length direction of the circumferential limiting groove 5215, the circumferential limiting block 5224 abuts against the side wall of the circumferential limiting groove 5215 and can slide along the length direction of the circumferential limiting groove 5215.

[0098] Therefore, by inserting the circumferential limiting block 5224 into the circumferential limiting groove 5215, the side wall of the circumferential limiting groove 5215 limits the circumferential limiting block 5224, so that the flow limiter 522 cannot rotate circumferentially relative to the inner liner support 521; the axial limiting block can slide along the length direction of the circumferential limiting groove 5215, so that the flow limiter 522 can slide axially relative to the inner liner support 521.

[0099] In addition, in other embodiments, the circumferential limiting groove 5215 can be arranged on the inner circumferential side of the flow limiter 522, and the circumferential limiting block 5224 is arranged on the outer circumferential side of the water blocking portion 5212.

[0100] With reference to Figure 3 and Figure 5 The elastic return member 525 includes a compression spring arranged in the water blocking portion 5212, and the opposite ends of the compression spring respectively abut against the mounting portion 5211 and the bottom surface of the flow limiter body 5221. This arrangement is simple and reasonable, and makes full use of the space inside the inner liner support 521, so that the structure of the valve core assembly 520 is compact, and meanwhile, the inner liner support 521 can guide the compression spring, so that the deformation direction of the compression spring is parallel to the axial direction of the inner liner support 521.

[0101] When the water outlet 540 is out of water, the water flow impacts the rotor 523, the threaded rod drives the flow limiter cover body 5221 to slide towards the mounting portion 5211, so that the compression spring is compressed; when the water outlet 540 stops out of water, the water flow stops impacting the rotor 523, at this time the compression spring drives the flow limiter cover body 5221 to slide away from the inner lining support 521, the flow limiter cover body 5221 drives the threaded rod and the rotor 523 to rotate reversely.

[0102] In addition, in other embodiments, the elastic reset member 525 can also be a tension spring, one end of the tension spring is connected to the bottom of the flow limiter cover body 5221, and the other end of the tension spring is connected to the water blocking portion 5212.

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

Claims

1. A bypass valve comprising a valve body, a water inlet channel, a water outlet channel and a bypass channel are arranged in the valve body, the bypass channel is communicated with the water inlet channel and the water outlet channel; characterized in that, the bypass valve further comprises a valve core assembly, the valve core assembly comprises an inner liner support, a flow limiting cover, a rotor and a transmission member; the inner liner support and the flow limiting cover are arranged in the bypass channel, the peripheral side of the inner liner support and / or the peripheral side of the flow limiting cover is provided with a flow hole communicated with the water inlet channel and the water outlet channel, the flow limiting cover and the inner liner support can relatively slide to adjust the opening degree of the flow hole; the rotor can rotate under the impact of water flow; the transmission member is engaged with the rotor and the flow limiting cover, the transmission member is used for converting the rotation of the rotor into the sliding of the flow limiting cover relative to the inner liner support; the transmission member comprises a threaded rod, the axis direction of the threaded rod is parallel to the sliding direction of the flow limiting cover relative to the inner liner support; the flow limiting cover is provided with a threaded hole and the flow limiting cover is fixed on the inner liner support in the circumferential direction, the threaded rod is coaxially connected with the rotor, and the threaded rod is matched with the threaded hole, the rotor can drive the threaded rod to rotate when the rotor rotates; the flow limiting cover is arranged at the end of the inner liner support away from the rotor, the threaded rod passes through the inner liner support to be connected with the flow limiting cover; the inner liner support is fixed on the valve body, the flow limiting cover is engaged with the rotor through the transmission member, and the flow limiting cover can slide relative to the inner liner support when the rotor rotates; the valve core assembly further comprises an elastic reset member; the elastic reset member abuts against the flow limiting cover, and the elastic reset member is used for applying a force to the flow limiting cover in a direction away from the inner liner support.

2. The bypass valve of claim 1, wherein the flow limiting cover comprises a flow limiting cover body and a connecting portion, the connecting portion is arranged at one end of the flow limiting cover body in the sliding direction of the flow limiting cover relative to the inner liner support, the end of the flow limiting cover body is inwardly protruded to form the connecting portion, and the threaded hole is arranged in the connecting portion.

3. The bypass valve of claim 2, wherein the flow limiting cover body is sleeved on the outer peripheral side of the inner liner support, and the connecting portion is arranged at the end of the flow limiting cover body away from the inner liner support.

4. The bypass valve of claim 3, wherein the flow hole is arranged on the peripheral side of the inner liner support.

5. The bypass valve of claim 1, wherein one of the peripheral sides of the flow limiting cover and the inner liner support is provided with a circumferential limiting groove, the extending direction of the circumferential limiting groove is parallel to the sliding direction of the flow limiting cover relative to the inner liner support, and the other of the peripheral sides of the flow limiting cover and the inner liner support is provided with a circumferential limiting block matched with the circumferential limiting groove, the circumferential limiting block abuts against the side wall of the circumferential limiting groove and can slide along the length direction of the circumferential limiting groove.

6. The bypass valve of claim 1, wherein the flow hole is a long strip-shaped hole, and the length direction of the flow hole is parallel to the sliding direction of the flow limiting cover relative to the inner liner support.

7. The bypass valve of claim 1, wherein the minimum flow area of the bypass channel is less than 1 / 3 times the total maximum flow area of the flow hole.

8. The bypass valve of claim 1, wherein the rotor is arranged in the water outlet channel.

9. The bypass valve of claim 1, wherein The elastic reset member comprises a compression spring, the compression spring is arranged in the inner liner support, and opposite ends of the compression spring are respectively in abutment with the inner liner support and the flow limiter cover.

10. A water heater, characterized by The water heater comprises the bypass valve according to any one of claims 1-9.

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