Flow regulating device and gas water heater comprising same

Abstract

The application discloses a flow regulating device and a gas water heater comprising the same. The flow regulating device comprises a flow channel, a flow blocking block arranged in the flow channel, a driving assembly for driving the flow blocking block to different positions, a first pressure detecting module arranged at an upstream end of the flow blocking block and a second pressure detecting module arranged at a downstream end of the flow blocking block, and a controller. When the flow blocking block is at an initial position and a first pressure difference between a first pressure value detected by the first pressure detecting module and a second pressure value detected by the second pressure detecting module is not zero, the controller controls the driving assembly to drive the flow blocking block to move away from the initial position, and the initial position is a position at which the flow blocking block makes the flow cross section of the flow channel minimum. The specific structure of the flow regulating device can have a normal initial flow under normal circumstances and reduce the initial flow during the re-water process, so that the re-water temperature drop phenomenon can be avoided.

Description

Technical Field

[0001] This invention relates to the field of gas water heaters, and particularly to a flow regulating device and a gas water heater comprising the same. Background Technology

[0002] In existing technology, gas water heaters often experience water temperature fluctuations during use. After the water is turned on for a period of time and then off, the pipes remain filled with hot water. However, when the water is immediately turned on again, the ignition and flame transmission processes are required before the water can burn at the user's desired temperature. Therefore, the user will experience a noticeable temperature drop at the tap: the water is initially hot (from the remaining hot water in the pipes), then gradually cools (from the cold water produced during the ignition and flame transmission process), and then heats up again (from the hot water produced by combustion). This results in a poor water temperature experience. This phenomenon is called the "re-outlet temperature drop" phenomenon.

[0003] The severity of the temperature drop when the hot water tap is turned on varies depending on the water flow rate. When the flow rate is low, less cold water flows through the gas water heater during ignition and flame transmission, and the residual heat stored in the heat exchanger provides some heating effect on this low flow rate, resulting in a small temperature drop. Conversely, the higher the flow rate, the greater the temperature drop. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defect of the re-outflow water temperature drop phenomenon in the existing gas water heaters during use, and to provide a flow regulating device and a gas water heater including the same.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] A flow regulating device, characterized in that the flow regulating device comprises:

[0007] Flow channel;

[0008] A flow interceptor block is disposed in the flow channel and has a gap between it and the inner wall of the flow channel. The flow interceptor block includes an upstream end and a downstream end arranged sequentially along the flow direction of the liquid in the flow channel.

[0009] A driving component, the driving component being used to drive the throttling block to different positions;

[0010] A first pressure detection module and a second pressure detection module are provided, wherein the first pressure detection module is located at the upstream end of the intercepting block and the second pressure detection module is located at the downstream end of the intercepting block.

[0011] The controller, the drive component, the first pressure detection module and the second pressure detection module are respectively connected to the controller;

[0012] When the flow-blocking block is in the initial position, and when the first pressure difference between the first pressure value detected by the first pressure detection module and the second pressure value detected by the second pressure detection module is not zero, the controller controls the drive component to drive the flow-blocking block away from the initial position, where the initial position is the position where the flow-blocking block minimizes the flow cross-section of the flow channel.

[0013] In this technical solution, by setting the specific structure of the flow regulation device, it is possible to have a normal initial flow rate under normal circumstances, and to reduce the initial flow rate during the re-outflow process, thereby avoiding the phenomenon of re-outflow water temperature drop. When the water is not turned on (meaning the hot water tap of the gas water heater is not turned on), the liquid in the pipe is still, and the flow-blocking block is in its initial position, making the flow area of ​​the channel at its minimum. At this time, the liquid in the channel is in a non-flowing state, and neither the upstream nor downstream end of the flow-blocking block is subjected to the scouring force of the liquid. That is, the flow-blocking block is only subjected to the static pressure of the liquid and the pressure is balanced. Therefore, the first pressure value detected by the first pressure detection module is equal to the second pressure value detected by the second pressure detection module (i.e., the first pressure difference between the two is zero). When the water is turned on, the liquid in the channel is in a flowing state. The scouring force of the liquid on the upstream end of the flow-blocking block in the initial position is greater than the scouring force on the downstream end. Therefore, the first pressure value detected by the first pressure detection module must be greater than the second pressure value detected by the second pressure detection module (i.e., the first pressure difference between the two is not zero). At this time, the controller controls the drive component to drive the flow-blocking block away from the initial position, thereby moving away from the position of minimum flow area, so that the flow area gradually increases, and the channel gradually has a normal initial flow. When the water is turned off, the liquid in the pipe becomes still again. At this time, the first pressure value detected by the first pressure detection module returns to the same as the second pressure value detected by the second pressure detection module (i.e., the first pressure difference between the two is zero). The controller controls the drive component to drive the flow blocking block back to its initial position until the water is turned on again.

[0014] Preferably, when the first pressure difference between the first pressure value and the second pressure value is not zero, the controller obtains the second pressure difference between the first pressure value and a preset pressure value, wherein the preset pressure value is greater than or equal to the first pressure value;

[0015] When the second pressure difference is greater than zero, the controller controls the drive component to drive the throttling block away from the initial position and move to the first position, which is the position corresponding to when the first pressure value rises to the preset pressure value;

[0016] When the second differential pressure value is equal to zero, the controller controls the drive component to drive the throttling block to remain in the initial position.

[0017] In this technical solution, the above settings are used to move or keep the flow blocking block at a position where the first pressure value is equal to the preset pressure value, thereby adjusting the specific position of the flow blocking block by the preset pressure value.

[0018] Preferably, the outlet of the flow regulating device is provided with a temperature sensor electrically connected to the controller, and the temperature sensor is used to detect a first temperature of the liquid at the outlet of the flow regulating device;

[0019] When the flow-blocking block is located at the first position, and when the first temperature is less than the preset temperature, the controller controls the drive component to drive the flow-blocking block to move away from the first position to the second position, which is the position corresponding to when the first temperature rises to the preset temperature.

[0020] In this technical solution, by means of the above settings, when the first temperature of the liquid at the outlet of the flow regulating device is lower than the preset temperature, the controller controls the drive component to drive the throttling block to move to reduce the flow rate, thereby increasing the first temperature and playing the role of water flow servo.

[0021] Preferably, the upstream and downstream ends of the intercepting block are arranged opposite to each other. When the intercepting block is in the initial position and the liquid in the flow channel is in a non-flowing state, neither the upstream nor the downstream end is subjected to the scouring force of the liquid. When the intercepting block is in the initial position and the liquid in the flow channel is in a flowing state, the scouring force of the liquid on the upstream end is greater than the scouring force of the liquid on the downstream end.

[0022] The upstream end is a plane and is arranged perpendicular to the flow direction of the liquid; or, both the upstream end and the downstream end are planes and are arranged perpendicular to the flow direction of the liquid.

[0023] In this technical solution, the above settings provide a specific method for setting the upstream and downstream ends.

[0024] Preferably, the flow channel includes a first flow channel and a second flow channel that are perpendicular to each other, and the liquid passes through the first flow channel and the second flow channel in sequence.

[0025] In this technical solution, by setting up a first flow channel and a second flow channel that are perpendicular to each other, the structure of the flow regulating device is made more compact.

[0026] Preferably, the intercepting block is disposed at one end of the second flow channel near the first flow channel, and the intercepting block is movable along the axial direction of the first flow channel.

[0027] In this technical solution, the flow cross-section of the flow channel can be changed by the flow intercepting block being able to move along the axial direction of the first flow channel.

[0028] Preferably, the sidewall of the second flow channel is provided with a receiving groove, the shape and size of which are matched with the flow-blocking block, and the receiving groove is used to accommodate the flow-blocking block.

[0029] In this technical solution, by setting up a receiving groove, a receiving space is provided for the intercepting block, so that the intercepting block can enter the receiving groove as it moves axially along the first flow channel, thereby saving overall space while achieving the purpose of changing the flow cross section of the flow channel.

[0030] Preferably, the driving assembly includes a driving component and a transmission component. The driving component drives the transmission component to move the flow-blocking block. The driving component is disposed on the outside of the flow channel, and the transmission component passes through the side wall of the flow channel. One end of the transmission component is located on the outside of the flow channel and connected to the driving component, and the other end is located in the flow channel and connected to the flow-blocking block.

[0031] In this technical solution, the above settings provide a specific structure for a driving component.

[0032] Preferably, the driving component is a motor, and the transmission component is a telescopic rod.

[0033] In this technical solution, the above-described configuration provides a specific structure for a driving component and a transmission component.

[0034] A water heater characterized in that it includes a flow regulating device as described above.

[0035] The positive and progressive effects of this invention are as follows:

[0036] By setting a specific structure for the flow regulation device, this invention can achieve a normal initial flow rate under normal circumstances, and reduce the initial flow rate during the re-outflow process, thereby avoiding the phenomenon of temperature drop in the re-outflow water. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the flow regulating device according to Embodiment 1 of the present invention.

[0038] Figure 2 This is a schematic diagram of the flow regulating device according to Embodiment 1 of the present invention, showing the throttling block in its initial position.

[0039] Figure 3 This is a schematic diagram of the flow regulating device according to Embodiment 1 of the present invention, showing the throttling block leaving its initial position.

[0040] Figure 4This is a schematic diagram of the structure of a gas water heater according to Embodiment 1 of the present invention.

[0041] Explanation of reference numerals in the attached figures

[0042] Gas water heater 1

[0043] Flow regulating device 10

[0044] Flow channel 11

[0045] First flow channel 111

[0046] Second flow channel 112

[0047] Container 1121

[0048] Interceptor Block 12

[0049] Upstream end 121

[0050] Downstream end 122

[0051] Driver Component 13

[0052] Drive component 131

[0053] Transmission component 132

[0054] First pressure detection module 141

[0055] Second pressure detection module 142

[0056] 16-shell

[0057] Inlet 161

[0058] Outlet 162

[0059] Cold water pipe 20

[0060] Cold water inlet 21

[0061] Water sensor 22

[0062] Hot water pipe 40

[0063] Heat exchanger 50

[0064] Burner 60

[0065] The direction of liquid flow W Detailed Implementation

[0066] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0067] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "circumferential," and "radial," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0068] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0069] like Figures 1 to 3 As shown, this embodiment provides a flow regulating device 10, which includes: a flow channel 11, a flow blocking block 12, a drive assembly 13, a controller, a first pressure detection module 141, and a second pressure detection module 142. The drive assembly 13, the first pressure detection module 141, and the second pressure detection module 142 are respectively connected to the controller.

[0070] A flow-blocking block 12 is disposed in the flow channel 11 and has a gap between it and the inner wall of the flow channel 11. The flow-blocking block 12 includes an upstream end 121 and a downstream end 122 arranged sequentially along the flow direction W of the liquid in the flow channel 11. A drive assembly 13 is used to drive the flow-blocking block 12 to different positions. A first pressure detection module 141 is disposed at the upstream end 121 of the flow-blocking block 12, and a second pressure detection module 142 is disposed at the downstream end 122 of the flow-blocking block 12. Specifically, when the flow-blocking block 12 is in the initial position, and when the first pressure value detected by the first pressure detection module 141 and the first pressure difference value detected by the second pressure detection module 142 are not zero, the controller controls the drive assembly 13 to drive the flow-blocking block 12 away from the initial position. The initial position is the position where the flow-blocking block 12 minimizes the flow cross-section of the flow channel 11.

[0071] In this way, by setting the specific structure of the flow regulating device 10, it can maintain a normal initial flow rate under normal circumstances, and reduce the initial flow rate during the re-outflow process, thereby avoiding the phenomenon of temperature drop in the re-outflow water. In the state where the water is not turned on (meaning the hot water tap of the gas water heater 1 is not turned on), the liquid in the pipe is static, and the intercepting block 12 is in its initial position, making the flow area of ​​the flow channel 11 at the position of minimum flow cross-section. At this time, the liquid in the flow channel 11 is in a non-flowing state, and neither the upstream end 121 nor the downstream end 122 of the intercepting block 12 is subjected to the scouring force of the liquid flow. That is, the intercepting block 12 is only subjected to the static pressure of the liquid, and the pressure is balanced. Therefore, the first pressure value detected by the first pressure detection module 141 is equal to the second pressure value detected by the second pressure detection module 142 (i.e., the first pressure difference between the two is zero). When the water is turned on, the liquid in the flow channel 11 is in a flowing state. The upstream end 121 of the intercepting block 12, located at the initial position, experiences a greater scouring force from the liquid than the downstream end 122. Consequently, the first pressure value detected by the first pressure detection module 141 is necessarily greater than the second pressure value detected by the second pressure detection module 142 (i.e., the first pressure difference between the two is not zero). At this time, the controller controls the drive assembly 13 to drive the intercepting block 12 away from its initial position, thus moving it away from the position with the smallest flow cross-section, causing the flow cross-section to gradually increase, thereby allowing the flow channel 11 to gradually have a normal initial flow rate. When the water is turned off, since the liquid in the pipe becomes still again, the first pressure value detected by the first pressure detection module 141 returns to the same level as the second pressure value detected by the second pressure detection module 142 (i.e., the first pressure difference between the two is zero). The controller controls the drive assembly 13 to drive the intercepting block 12 back to its initial position until the next time the water is turned on.

[0072] It should be noted that, since there is a gap between the intercepting block 12 and the inner wall of the flow channel 11, even if the intercepting block 12 is in the initial position, the liquid can still flow through the space of the gap. That is, when the intercepting block 12 is in the initial position, the flow channel 11 will not be completely closed.

[0073] Furthermore, when the first pressure difference between the first pressure value and the second pressure value is not zero, the controller obtains the second pressure difference between the first pressure value and the preset pressure value, wherein the preset pressure value is greater than or equal to the first pressure value.

[0074] When the second differential pressure value is greater than zero, the controller controls the drive assembly 13 to drive the throttling block 12 to move away from the initial position to the first position, which is the position corresponding to when the first pressure value rises to the preset pressure value. When the second differential pressure value is equal to zero, the controller controls the drive assembly 13 to drive the throttling block 12 to remain in the initial position.

[0075] In this way, through the above settings, the flow blocking block 12 can be moved or kept at a position (first position or initial position) where the first pressure value is equal to the preset pressure value, thereby achieving the goal of adjusting the specific position of the flow blocking block 12 by means of the preset pressure value.

[0076] In this embodiment, a temperature sensor electrically connected to the controller is provided at the outlet of the flow regulating device 10. The temperature sensor is used to detect the first temperature of the liquid at the outlet of the flow regulating device 10. When the flow blocking block 12 is in the first position, and when the first temperature is lower than the preset temperature, the controller controls the drive assembly 13 to drive the flow blocking block 12 away from the first position to the second position, which is the position corresponding to when the first temperature rises to the preset temperature. In this way, through the above settings, when the first temperature of the liquid at the outlet of the flow regulating device 10 is lower than the preset temperature, the controller controls the drive assembly 13 to drive the flow blocking block 12 to move to reduce the flow rate, thereby increasing the first temperature and playing a role in water flow servoing.

[0077] The upstream end 121 and the downstream end 122 of the intercepting block 12 are arranged opposite to each other. When the intercepting block 12 is in the initial position and the liquid in the flow channel 11 is in a non-flowing state, neither the upstream end 121 nor the downstream end 122 is subjected to the flow scouring force of the liquid. When the intercepting block 12 is in the initial position and the liquid in the flow channel 11 is in a flowing state, the flow scouring force of the liquid on the upstream end 121 is greater than the flow scouring force of the liquid on the downstream end 122.

[0078] Specifically, the upstream end 121 and downstream end 122 of the flow interceptor 12 are both planes, and are arranged perpendicular to the flow direction W of the liquid. The shape of the flow interceptor 12 is one of a cube, cuboid, or cylinder, that is, the upstream end 121 and downstream end 122 are two opposite planes of a cube, cuboid, or cylinder, respectively. However, it is not limited to this. In other embodiments, only the upstream end 121 may be a plane, and be arranged perpendicular to the flow direction W of the liquid. The shape of the flow interceptor 12 is a cone, with the upstream end 121 being the base of the cone and the downstream end 122 being the apex of the cone.

[0079] The flow channel 11 includes a first flow channel 111 and a second flow channel 112 that are perpendicular to each other, and the liquid passes through the first flow channel 111 and the second flow channel 112 in sequence. In this way, by setting the first flow channel 111 and the second flow channel 112 that are perpendicular to each other, the structure of the flow regulating device 10 is made more compact.

[0080] The flow interceptor 12 is disposed at one end of the second flow channel 112 near the first flow channel 111, and the flow interceptor 12 is movable along the axial direction of the first flow channel 111. In this way, by allowing the flow interceptor 12 to move along the axial direction of the first flow channel 111, the flow cross-section of the flow channel 11 can be changed.

[0081] The second flow channel 112 has a receiving groove 1121 on its side wall. The shape and size of the receiving groove 1121 are matched with the flow interceptor 12, and the receiving groove 1121 is used to accommodate the flow interceptor 12. In this way, by setting the receiving groove 1121 to provide a receiving space for the flow interceptor 12, the flow interceptor 12 can enter the receiving groove 1121 when it moves axially along the first flow channel 111, thereby saving overall space and changing the flow cross-section of the flow channel 11.

[0082] In this embodiment, the flow regulating device 10 also includes a housing 16, which has the aforementioned flow channel 11 inside. The housing 16 has an inlet 161 and an outlet 162, both of which are connected to the flow channel 11.

[0083] The drive assembly 13 includes a drive component 131 and a transmission component 132. The drive component 131 drives the transmission component 132 to move the flow interceptor 12. The drive component 131 is located on the outside of the flow channel 11, and the transmission component 132 passes through the side wall of the flow channel 11. One end of the transmission component 132 is located on the outside of the flow channel 11 and connected to the drive component 131, while the other end is located in the flow channel 11 and connected to the flow interceptor 12. Specifically, the drive component 131 is a motor, and the transmission component 132 is a telescopic rod. The telescopic rod drives the flow interceptor 12 to move up and down along the flow direction W of the liquid, thereby changing the position of the flow interceptor 12 in the flow channel 11 and thus changing the flow cross-section of the flow channel 11.

[0084] The working principle of the flow regulating device 10 in this embodiment is as follows: When the water is not turned on (meaning the hot water tap of the gas water heater 1 is not turned on), the flow blocking block 12 is in its initial position. Since the liquid in the pipe is static, the flow blocking block 12 is only subjected to the static pressure of the liquid. The first pressure value detected by the first pressure detection module 141 is equal to the second pressure value detected by the second pressure detection module 142 (i.e., the first pressure difference between the two is zero). At this time, the telescopic rod is in the extended state. When the user turns on the water, the liquid in the flow channel 11 is in a flowing state. Due to the scouring force of the liquid flow, the first pressure detection module 141 is subjected to significant dynamic pressure. Therefore, the pressure values ​​measured by the first pressure detection module 141 and the second pressure detection module 142 are different. The controller controls the motor to work, the telescopic rod retracts, and the flow blocking block 12 gradually reduces the flow rate.

[0085] Preferably, the duration and position of the flow-stopping block 12 can be controlled based on the difference between the first pressure value detected by the first pressure detection module 141 and the second pressure value detected by the second pressure detection module 142, so as to optimize the temperature drop under each flow rate.

[0086] It should be noted that in existing technologies, the flow rate is usually calculated by using water flow to drive a rotor to cut a magnetic field and generate a microcurrent. However, in this embodiment, the flow rate is obtained by calculating the fluid velocity from the pressure generated by the water flow impact based on the momentum equation Ft = mv1 - mv2, and then multiplying it by the cross-sectional area. This yields a more accurate flow rate data.

[0087] like Figure 4 As shown, this embodiment also provides a gas water heater 1, which includes a cold water pipe 20 for supplying cold water, a hot water pipe 40 for supplying hot water, and a heat exchanger 50 for exchanging heat between the supplied water and the high-temperature flue gas generated by combustion to heat the water. Both the cold water pipe 20 and the hot water pipe 40 are connected to the heat exchanger 50. Below the heat exchanger 50 is a burner 60 for supplying heat to the heat exchanger 50 through gas combustion. Thus, cold water flows into the heat exchanger 50 through the cold water pipe 20, and after exchanging heat with the high-temperature flue gas generated by combustion, the temperature rises and the water becomes hot water. The hot water flows out of the heat exchanger 50 through the hot water pipe 40 for user use.

[0088] In this embodiment, the cold water pipe 20 and the hot water pipe 40 are respectively arranged on opposite sides of the heat exchanger 50, thereby making the heat exchange arrangement more balanced, reducing the likelihood of interference between the cold water pipe 20 and the hot water pipe 40, and facilitating the installation of the cold water pipe 20 and the hot water pipe 40. Furthermore, in other embodiments, the cold water pipe 20 and the hot water pipe 40 can also be arranged at suitable locations on the heat exchange assembly.

[0089] The gas water heater 1 also includes the flow regulating device 10 as described above. The flow regulating device 10 is located near the cold water inlet 21 of the cold water pipe 20 and is located between the cold water inlet 21 and the water volume sensor 22 installed on the cold water pipe 20.

[0090] The gas water heater 1 in this embodiment, by setting the specific structure of the flow regulating device 10, can have a normal initial flow under normal circumstances, and can reduce the initial flow during the re-outflow process, thereby avoiding the phenomenon of temperature drop in the re-outflow water.

[0091] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A flow regulating device, characterized in that, The flow regulating device includes: Flow channel; A flow interceptor block is disposed in the flow channel and has a gap between it and the inner wall of the flow channel. The flow interceptor block includes an upstream end and a downstream end arranged sequentially along the flow direction of the liquid in the flow channel. A driving component, the driving component being used to drive the throttling block to different positions; A first pressure detection module and a second pressure detection module are provided, wherein the first pressure detection module is located at the upstream end of the intercepting block and the second pressure detection module is located at the downstream end of the intercepting block. The controller, the drive component, the first pressure detection module and the second pressure detection module are respectively connected to the controller; Wherein, when the flow-blocking block is in the initial position, and when the first pressure value detected by the first pressure detection module and the first pressure difference value detected by the second pressure detection module are not zero, the controller controls the driving component to drive the flow-blocking block away from the initial position, the initial position being the position where the flow-blocking block minimizes the flow cross-section of the flow channel; When the first pressure difference between the first pressure value and the second pressure value is not zero, the controller obtains the second pressure difference between the first pressure value and a preset pressure value, wherein the preset pressure value is greater than or equal to the first pressure value. When the second pressure difference is greater than zero, the controller controls the drive component to drive the throttling block away from the initial position and move to the first position, which is the position corresponding to when the first pressure value rises to the preset pressure value; When the second differential pressure value is equal to zero, the controller controls the drive assembly to drive the throttling block to remain in the initial position; The outlet of the flow regulating device is provided with a temperature sensor electrically connected to the controller, and the temperature sensor is used to detect the first temperature of the liquid at the outlet of the flow regulating device. When the flow-blocking block is located at the first position, and when the first temperature is less than the preset temperature, the controller controls the drive component to drive the flow-blocking block to move away from the first position to the second position, which is the position corresponding to when the first temperature rises to the preset temperature.

2. The flow regulating device as described in claim 1, characterized in that, The upstream and downstream ends of the intercepting block are arranged opposite to each other. When the intercepting block is in the initial position and the liquid in the flow channel is in a non-flowing state, neither the upstream nor the downstream end is subjected to the scouring force of the liquid. When the intercepting block is located at the initial position and the liquid in the flow channel is in a flowing state, the flow scouring force of the liquid on the upstream end is greater than the flow scouring force of the liquid on the downstream end. The upstream end is a plane and is arranged perpendicular to the flow direction of the liquid; or, both the upstream end and the downstream end are planes and are arranged perpendicular to the flow direction of the liquid.

3. The flow regulating device as described in claim 1, characterized in that, The flow channel includes a first flow channel and a second flow channel that are perpendicular to each other, and the liquid passes through the first flow channel and the second flow channel in sequence.

4. The flow regulating device as described in claim 3, characterized in that, The intercepting block is disposed at one end of the second flow channel near the first flow channel, and the intercepting block is movable along the axial direction of the first flow channel.

5. The flow regulating device as described in claim 4, characterized in that, The second flow channel has a receiving groove on its side wall. The shape and size of the receiving groove are matched with the flow-blocking block. The receiving groove is used to accommodate the flow-blocking block.

6. The flow regulating device as described in claim 1, characterized in that, The driving assembly includes a driving component and a transmission component. The driving component drives the transmission component to move the flow-blocking block. The driving component is disposed on the outside of the flow channel, and the transmission component passes through the side wall of the flow channel. One end of the transmission component is located on the outside of the flow channel and connected to the driving component, and the other end is located in the flow channel and connected to the flow-blocking block.

7. The flow regulating device as described in claim 6, characterized in that, The driving component is a motor, and the transmission component is a telescopic rod.

8. A water heater, characterized in that, The water heater includes a flow regulating device as described in any one of claims 1-7.

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