A water heater control module

Abstract

The utility model discloses a water heater control module belongs to water heater control technical field. The utility model adopts technical scheme for, a water heater control module, including the casing, the casing both ends are equipped with each other's intercommunication water inlet channel, drain channel, valve core subassembly is set between water inlet channel and drain channel, is used for the control water inlet channel and drain channel between the intercommunication or close of passage, still include the control circuit for controlling water heater switch, first micro -switch and second micro -switch are provided with in series on the control circuit, the utility model discloses through the series connection setting first micro -switch and second micro -switch, and the linkage design of pressure drive unit and handle is combined, realizes the double control of water flow pressure and mechanical operation, avoids the dry -burning risk of false triggering, sets up pressure drive unit at drain channel end simultaneously, reduces the device continuous pressure, improves reliability and service life.

Description

Technical Field

[0001] This utility model belongs to the field of water heater control technology, specifically relating to a water heater control module. Background Technology

[0002] Existing water heater control modules typically have a valve core installed in the middle of the water circuit and a groove with an elastic diaphragm in the outlet pipe. Power is controlled by a microswitch driven by water pressure. While this structure is simple, it has significant drawbacks: in low-temperature freezing conditions, ice expansion can cause the diaphragm to falsely trigger the microswitch. At this time, the inlet is frozen and unable to supply water, causing the heating element to burn dry. When the valve core does not close completely or the diaphragm ages, insufficient water flow but the microswitch remains energized can also lead to the danger of dry burning.

[0003] To address these issues, existing technologies have proposed a dual microswitch solution, where two switches are controlled separately by a water pressure controller and a manual controller, allowing heating only when both are simultaneously activated. However, this structure places the water pressure controller on the inlet pipe, subjecting it to continuous tap water pressure, causing the controller to operate continuously and affecting its lifespan. Specifically, prolonged pressure on the silicone diaphragm reduces its resilience, prolonged closure of the microswitch shortens its electrical life, and there is also a risk of leakage.

[0004] In view of the problems of insufficient reliability, short service life and safety hazards of the control modules in the existing technology, there is an urgent need to develop a new water heater control solution. Utility Model Content

[0005] This utility model provides a water heater control module to solve at least one of the above-mentioned technical problems.

[0006] The technical solution adopted in this utility model is as follows: A water heater control module includes a housing with an inlet channel and a drain channel connected to each other at both ends; a valve core assembly disposed between the inlet and drain channels for controlling the connection or closure of the passage between the inlet and drain channels; a control circuit for controlling the water heater switch, wherein a first micro switch and a second micro switch are connected in series on the control circuit; a pressure drive unit disposed at one end of the drain channel of the housing, wherein the pressure drive unit controls the first micro switch to open or close by the water pressure of the water flowing into the drain channel; and a handle coaxially disposed with the valve core assembly, wherein the outer wall of the handle is provided with a slider for driving the second micro switch to open or close.

[0007] Furthermore, this application also proposes that the water inlet channel and the drainage channel are staggered in height, the water inlet channel and the drainage channel are connected through a first channel, and the housing is provided with a mounting base for installing the valve core assembly.

[0008] Furthermore, this application also proposes that the valve core assembly includes a valve member, the valve member having a passage for connecting a first channel and a water inlet channel, the valve member being rotated to have a first position where the passage connects the first channel and the water inlet channel and a second position where the connection between the first channel and the water inlet channel is blocked, and the upper end of the valve member having a pin for connecting a handle.

[0009] Furthermore, this application also proposes that the second micro switch is provided with a second elastic contact, and during the process of the handle driving the valve to rotate from the second position to the first position, the slider rotates towards the second elastic contact and applies downward pressure to the second elastic contact.

[0010] Furthermore, this application also proposes that it includes a switch holder, on which two sets of rectangular slots are arranged side by side for mounting a first micro switch and a second micro switch respectively.

[0011] Furthermore, this application also proposes that the pressure driving unit includes a receiving groove disposed on the housing, the receiving groove being located on one side of the drainage channel and having an upward opening, the receiving groove being connected to the inner cavity of the drainage channel through a second channel, the receiving groove being provided with an elastic diaphragm, and the upper end of the elastic diaphragm being provided with a push rod.

[0012] Furthermore, this application also proposes that the switch base is fixedly connected to the outer edge of the receiving groove, the switch base is provided with a slide rail coaxial with the push rod, the switch base is provided with a lever assembly, the first micro switch is provided with a first elastic contact, one end of the lever assembly is located directly above the first elastic contact, and the other end is located directly above the push rod.

[0013] Furthermore, this application also proposes that two vertical ribs are arranged parallel to each other on the outer wall of the receiving groove, an L-shaped notch is opened at the upper end of the vertical rib, a through hole is provided on the switch seat to cooperate with the vertical rib, a support frame is provided on the switch seat to cooperate with the vertical rib, a “7” shaped notch is provided on the support frame, and the “7” shaped notch and the L-shaped notch cooperate to form a connecting seat for connecting the lever assembly.

[0014] Furthermore, this application also proposes that the lever assembly includes a pressure rod, with a first contact point cooperating with a first elastic contact point and a second contact point cooperating with a push rod at both ends, and a rotating shaft cooperating with a connecting seat in the middle of the pressure rod.

[0015] Furthermore, this application also proposes that the upper end of the rectangular groove is provided with a limiting barb for fixing the first micro switch and the second micro switch.

[0016] Due to the adoption of the above technical solution, the beneficial effects achieved by this utility model are as follows: 1. This solution moves the pressure drive unit to the drain end, where it only bears dynamic water pressure during water discharge, significantly reducing the continuous pressure time of components. Simultaneously, the dual-switch design eliminates the risk of a single trigger source; power is only activated when both manual operation and water flow conditions are met simultaneously, fundamentally preventing malfunctions caused by icing or component aging.

[0017] This application effectively prevents the risk of dry burning caused by low-temperature freezing or improper valve closure, and avoids the heating element operating in a water-deficient state. The operating environment of the pressure drive unit changes from continuous high pressure to intermittent dynamic pressure, extending the service life of the elastic diaphragm and microswitch. The dual triggering mechanism ensures that heating start-up requires both manual operation and water flow conditions, improving the level of safety protection.

[0018] 2. This solution effectively disperses the pressure surge at the inlet end through a staggered structure and a transition design in the first channel, preventing the valve core assembly and related control components from being under high pressure for extended periods. Furthermore, the independent design of the mounting base simplifies the assembly process of the valve core assembly, enabling precise positioning without relying on external fixing structures.

[0019] This application reduces the risk of deformation or aging of valve core assemblies and related control components due to long-term pressure, thereby avoiding dry burning problems caused by elastic diaphragm rebound failure or microswitch misoperation. Simultaneously, the pressure buffer area formed by the high-low misalignment structure reduces the direct compression of internal components by ice expansion, further improving the reliability of the control module in low-temperature environments.

[0020] 3. This solution directly controls water flow by mechanically rotating a valve. In existing technologies, water pressure controllers subjected to high pressure at the inlet end for extended periods are prone to component fatigue. However, this solution places the valve between the inlet and outlet channels, preventing continuous high pressure from directly acting on the control elements and extending the service life of critical components.

[0021] Through the above technical solution, this application achieves rigid mechanical control of the water flow channel, eliminating the risk of false triggering caused by water pressure fluctuations or component aging. The rigid connection structure between the valve and the handle ensures that the water flow switch state and the operation are strictly synchronized, avoiding the false triggering caused by the expansion of ice or the blockage of impurities in traditional elastic diaphragms, and fundamentally preventing the hidden danger of dry burning.

[0022] 4. This solution achieves dual control through a mechanical linkage structure: the activation of the second microswitch requires both the valve to be fully open and the handle to be rotated to the correct position simultaneously, effectively avoiding false triggering caused by aging parts or obstruction by foreign objects. The linear relationship between the rotation angle and pressure transmission is more conducive to precise control of the switch action sequence.

[0023] Through the above technical solution, this application achieves dual physical isolation control of the heating circuit. The second microswitch is only accurately triggered when the user actively rotates the handle to the fully open position and the valve is indeed in a water-connected state. This rigid mechanical interlocking mechanism fundamentally eliminates the possibility of circuit misoperation due to component failure or environmental factors, effectively preventing dry-burning accidents.

[0024] 5. This solution achieves precise positioning and installation of dual switches through an integrated switch base and rectangular slot structure, avoiding circuit malfunctions caused by contact offset. At the same time, the limit hook design simplifies the switch replacement and maintenance process.

[0025] Through the above technical solution, this application solves the problem of poor contact caused by poor installation stability of micro switches, ensuring that the two switches can still maintain precise alignment under the condition of limited internal space of the housing, reducing the interference of water pressure fluctuations or mechanical vibrations generated during handle operation on the switch contacts, thereby improving the reliability of circuit control and extending the service life of the switch.

[0026] 6. This application positions the receiving tank on the drainage channel side, only bearing transient water pressure during actual water discharge. Existing technologies use a single diaphragm to directly trigger a microswitch, while this application, through a mechanical amplification structure of a push rod and lever assembly, reduces the requirements for elastic diaphragm deformation and achieves more precise switching control. Existing technologies have diaphragm cavities directly exposed to flowing water, making them susceptible to impurities; this application, through a flow-limiting design of the second channel, effectively prevents particulate matter from entering the receiving tank.

[0027] Through the above technical solution, this application achieves precise correspondence between the pressure drive unit and the water flow state. When there is no water in the drainage channel or the water pressure is insufficient, the push rod automatically resets to ensure reliable circuit disconnection. The elastic diaphragm is only briefly pressurized during water discharge, significantly extending the service life of the sealing material. The orifice diameter control of the second channel ensures both pressure transmission efficiency and avoids diaphragm jamming caused by impurity accumulation, forming a dual safety guarantee mechanism.

[0028] 7. This solution converts water pressure drive into indirect force through a lever assembly, reducing the stress on the first elastic contact. Existing solutions lack a guiding structure between the elastic diaphragm and the switch, making them prone to uneven wear. This solution uses a slide rail to limit the movement trajectory of the push rod, preventing seal failure caused by component misalignment. Existing solutions use a single fixing method for the switch base and housing. This solution combines bolt sealing with a slide rail design, ensuring both sealing performance and precise transmission of mechanical action.

[0029] Through the above technical solution, this application effectively solves the problem of false triggering caused by the asynchronous deformation of the elastic diaphragm and the action of the microswitch, avoiding the risk of dry burning caused by the circuit remaining closed when the water flow is interrupted. The force transmission mechanism of the lever assembly reduces the accuracy requirements for the deformation of the elastic diaphragm and extends the service life of the pressure drive unit. The combined design of the slide and bolt sealing improves the reliability of the push rod action and prevents component displacement or leakage caused by water pressure fluctuations.

[0030] 8. This application forms a closed connecting seat by cooperating with the vertical rib and the support frame, so that the rotating shaft of the lever assembly is always in a stable constrained state, avoiding the problem of false triggering of micro switches caused by component displacement.

[0031] Through the above technical solution, this application solves the problem of poor micro-switch contact caused by unstable installation of the lever assembly, improves the reliability of the control module in long-term use, and reduces production complexity through modular assembly design, ensuring that the sealing performance of the water pressure drive unit and the switch seat is not affected by the movement of the lever assembly.

[0032] 9. This solution converts the linear motion of the push rod into rotational motion through a lever structure, ensuring that the microswitch contacts only bear intermittent pressure and preventing continuous deformation of the elastic components. The pivot support structure replaces the traditional cantilever beam load-bearing method, effectively distributing the mechanical load.

[0033] Through the above technical solution, this application solves the problem of easy aging and failure of components in traditional water pressure controllers. The rotating shaft structure of the lever assembly reduces frictional loss of moving parts, and the split design of the bidirectional contacts avoids pressure concentration and extends the service life of the microswitch. The setting of the rotating fulcrum ensures a stable and reliable pressure transmission path and prevents false triggering caused by water flow impact.

[0034] 10. This solution enables tool-free quick installation through a limiting hook. While ensuring the fixing strength, it allows the switch to be replaced by prying the hook with tools, which significantly improves the maintainability of the product.

[0035] Through the above technical solution, this application effectively solves the displacement problem of microswitches under long-term water flow impact, ensuring that the two microswitches always maintain a precise installation position in high temperature and high humidity environments, avoiding the risk of poor circuit contact or false triggering caused by loose switches, thereby improving the operational reliability of the water heater control module. Attached Figure Description

[0036] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model; Figure 2 This is a top view of a specific embodiment of the present utility model; Figure 3 This utility model Figure 2 Cross-sectional view at point AA; Figure 4 This is a schematic diagram of the handle structure in this utility model; Figure 5 This is a schematic diagram of the assembly structure of the housing and switch base in this utility model; Figure 6 This is a cross-sectional structural diagram of the shell in this utility model; Figure 7 This is a three-dimensional structural diagram of the shell in this utility model; Figure 8 This is a schematic diagram of the structure of the elastic adhesive film in this utility model; Figure 9 This is a schematic diagram of the switch base in this utility model; Figure 10 This is a schematic diagram of the structure of the first micro switch and the second micro switch in this utility model; Figure 11 This is a schematic diagram of the lever assembly in this utility model.

[0037] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0038] In the attached diagram: 1. Housing; 11. Water inlet channel; 12. Drainage channel; 13. First channel; 14. Mounting base; 15. Receiving groove; 151. Vertical rib; 1511. L-shaped notch; 16. Second channel; 17. Elastic diaphragm; 171. Top rod; 2. Valve; 21. Pin; 3. First micro switch; 31. First elastic contact; 4. Second micro switch; 41. Second elastic contact; 5. Handle; 51. Slider; 6. Switch base; 61. Rectangular groove; 611. Limiting hook; 62. Slide rail; 63. Lever assembly; 631. Pressure rod; 632. First contact; 633. Second contact; 634. Rotating shaft; 64. Support frame; 641. "7" shaped notch. Detailed Implementation

[0039] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0040] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0041] Furthermore, it should be understood in the description of this utility model that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0042] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0043] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "aspect," or "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] Those skilled in the art will understand that in existing technologies, water heater control modules typically employ a single water pressure control mechanism, triggering a microswitch to start heating when water flows through the pipe. However, under low-temperature freezing conditions, the expansion of ice volume may falsely trigger the switch, causing the heating element to operate in a water-deficient state. Furthermore, an incompletely closed valve core or an aging diaphragm may cause the switch to remain closed even with insufficient water flow, leading to a risk of dry burning. Existing improvements place the water pressure controller in the inlet pipe, but prolonged exposure to high pressure can cause component fatigue and failure, shortening its lifespan.

[0045] To address the aforementioned issues, a control structure is needed that can prevent false triggering and reduce component wear. Considering the issue of the water pressure controller being subjected to continuous high pressure in the inlet pipe, moving it to the outlet can reduce the pressure load. Simultaneously, a dual-switch mechanism is introduced, allowing power only when both manual operation and water pressure conditions are met, effectively preventing false activation in cases of freezing or insufficient water flow.

[0046] Therefore, this application proposes a water heater control module, referring to... Figures 1-11 Specifically, it includes a housing 1, with a water inlet channel 11 and a drain channel 12 connected at both ends. A valve core assembly is disposed between the water inlet channel 11 and the drain channel 12, controlling the connection or closure of the two passages. A control circuit is connected in series with a first micro switch 3 and a second micro switch 4. A pressure drive unit is disposed at the end of the drain channel 12, controlling the first micro switch 3 by water pressure. A handle 5 is coaxially disposed with the valve core assembly, and a slider 51 on its outer wall drives the second micro switch 4.

[0047] The housing 1 is a rigid structure that supports the water flow channel and components. It can be made of injection-molded engineering plastic and is used to fix the position of the valve core and pressure drive unit. The valve core assembly is a mechanical structure that controls the flow of water. It can be implemented using a rotary ceramic valve plate, and the channel is opened and closed by adjusting the angle. The control circuit is an electrical circuit that connects to the heating element. It can be integrated into a PCB board, with series switches ensuring simultaneous conduction for power to be supplied. The pressure drive unit is a device that converts water pressure into mechanical action. It can be a combination of an elastic diaphragm 17 and a push rod 171. The push rod 171 is displaced by deformation under pressure. The slider 51 is a cam structure that is linked to the handle 5. It can be injection-molded from nylon material and presses the microswitch contacts when rotated.

[0048] Specifically, when the user rotates handle 5 to open the valve core, slider 51 rotates simultaneously, pressing down the second microswitch 4. When water flows through the drain channel 12, the elastic diaphragm 17 of the pressure drive unit expands under pressure, and the push rod 171 pushes the first microswitch 3 to close. At this time, the control circuit forms a complete loop, and the heating element starts to work. When the water flow stops or the pressure is insufficient, the elastic diaphragm 17 resets, causing the first microswitch 3 to open, cutting off the power supply even if handle 5 is not closed. In the case of ice expansion, there is no water flow in the drain channel 12, and the pressure drive unit cannot trigger the first microswitch 3, avoiding accidental power-on.

[0049] Compared to existing technologies, the water pressure controller in current solutions is located in the inlet pipe, subjecting itself to long-term static pressure from the pipe network, leading to component fatigue. This solution moves the pressure drive unit to the outlet, where it only bears dynamic water pressure during water discharge, significantly reducing the continuous pressure exposure time of the components. Simultaneously, the dual-switch design eliminates the risk of a single trigger source; power is only activated when both manual operation and water flow conditions are met simultaneously, fundamentally preventing malfunctions caused by icing or component aging.

[0050] Through the above technical solutions, this application effectively prevents the risk of dry burning caused by low-temperature freezing or improper valve core closure, and avoids the heating element operating in a water-deficient state. The working environment of the pressure drive unit is changed from continuous high pressure to intermittent dynamic pressure, extending the service life of the elastic diaphragm and microswitch. The dual triggering mechanism ensures that heating start-up requires both manual operation and water flow conditions, improving the level of safety protection.

[0051] As a preferred embodiment of this application, refer to Figure 3 , Figure 6 and Figure 7 This application further proposes that the water inlet channel 11 and the drainage channel 12 are staggered in height, and the water inlet channel 11 and the drainage channel 12 are connected through the first hole 13. The housing 1 is provided with a mounting seat 14 for installing the valve core assembly.

[0052] The staggered arrangement refers to the fact that the axes of the inlet channel 11 and the outlet channel 12 are not on the same horizontal or vertical plane. This can be achieved using a stepped or inclined layout, which changes the direction of water flow and creates a pressure buffer zone. The first channel 13 is the transition channel connecting the inlet channel 11 and the outlet channel 12, which can be implemented using a cylindrical or rectangular through-hole. Its function is to establish a controllable connection path between the inlet and outlet channels. The mounting base 14 is the support structure inside the housing 1 used to fix the valve core assembly. It can be implemented using a threaded groove or a snap-fit ​​boss, ensuring the stable installation of the valve core assembly inside the housing 1.

[0053] Specifically, the inlet channel 11 and the outlet channel 12 are arranged in a staggered manner to form a pressure gradient. After entering through the inlet channel 11, the water flows through the first channel 13 to the outlet channel 12. During this process, the water pressure is partially offset by the stepped structure. The mounting base 14 is located at a specific position inside the housing 1, such as near the first channel 13. The valve core assembly is fixed to the mounting base 14 by threads or clips, thereby precisely controlling the opening and closing of the first channel 13 and the inlet channel 11. When the valve core assembly is in the closed state, the passage between the first channel 13 and the inlet channel 11 is blocked, and the water cannot enter the outlet channel 12. When the valve core assembly is open, the passage is connected, and the water flows through the first channel 13 into the outlet channel 12.

[0054] Compared to existing technologies, where the water pressure controller is directly installed on the inlet pipe, causing it to be subjected to high-pressure water flow impacts for extended periods, this solution effectively disperses the pressure impact at the inlet end through a staggered structure and the transition design of the first channel 13, preventing the valve core assembly and related control components from being under high pressure for extended periods. Furthermore, the independent design of the mounting base 14 simplifies the assembly process of the valve core assembly, enabling precise positioning without relying on external fixing structures.

[0055] Through the above technical solution, this application can reduce the risk of deformation or aging of valve core components and related control components due to long-term pressure, thereby avoiding dry burning problems caused by elastic diaphragm rebound failure or microswitch misoperation. At the same time, the pressure buffer area formed by the high and low staggered structure can reduce the direct compression of internal components by ice expansion, further improving the reliability of the control module in low-temperature environments.

[0056] This application further proposes a valve core assembly including valve element 2, referring to... Figure 3 and Figure 5 The valve 2 is provided with a passage for connecting the first channel 13 and the water inlet channel 11. The valve 2 is rotated to have a first position that connects the passage to the first channel 13 and the water inlet channel 11 and a second position that blocks the connection between the first channel 13 and the water inlet channel 11. The upper end of the valve 2 is provided with a pin 21 for connecting the handle 5.

[0057] The valve component 2 is the core component controlling the flow of water. It can be a rotary valve disc made of ceramic material, with through holes on its surface forming a water flow channel. The first position refers to the state where the valve component 2 is rotated until the through holes are aligned with the inlet channel 11 and the first orifice 13, allowing water to flow freely through the valve component 2. The second position refers to the state where the valve component 2 is rotated until the through holes are offset from the inlet channel 11 and the first orifice 13, at which point the solid part of the valve component 2 blocks water flow. The pin 21 is the transmission component connecting the valve component 2 and the handle 5. It can be a stainless steel cylinder, with its lower end fixedly connected to the valve component 2 and its upper end extending into the handle 5 to form a torque transmission structure.

[0058] Specifically, when the handle 5 is rotated, the pin 21 drives the valve 2 to rotate around its axis. When the valve 2 is in the first position, its through hole forms a continuous passage with the water inlet channel 11 and the first channel 13, allowing water to enter through the water inlet channel 11 and flow to the drain channel 12 through the first channel 13. When the valve 2 rotates to the second position, the through hole deviates from its original position, and the valve 2 completely blocks the connection between the water inlet channel 11 and the first channel 13, thus cutting off the water flow. The pin 21, as a rigid connecting component, ensures that the rotation angle of the handle 5 and the position of the valve 2 maintain a precise correspondence, avoiding water flow control failure due to transmission clearance.

[0059] Compared to existing technologies, traditional solutions rely on the deformation of an elastic diaphragm under pressure to trigger a switch, while this solution directly controls the flow of water through a mechanically rotating valve 2. In existing technologies, water pressure controllers subjected to prolonged high pressure at the inlet are prone to component fatigue. This solution, however, places the valve 2 between the inlet channel 11 and the outlet channel 12, preventing continuous high pressure from directly acting on the control elements and extending the service life of critical components.

[0060] Through the above technical solution, this application achieves rigid mechanical control of the water flow channel, eliminating the risk of false triggering caused by water pressure fluctuations or component aging. The rigid connection structure between valve 2 and handle 5 ensures that the water flow switch state and operation are strictly synchronized, avoiding the false triggering caused by the expansion of ice or the blockage of impurities in traditional elastic diaphragms, and fundamentally preventing the hidden danger of dry burning.

[0061] Refer to 5 and Figure 10 This application further proposes that the second micro switch 4 is provided with a second elastic contact 41. During the process of the handle 5 driving the valve 2 to rotate from the second position to the first position, the slider 51 rotates towards the second elastic contact 41 and applies downward pressure to the second elastic contact 41.

[0062] The second elastic contact 41 refers to a conductive contact component with an elastic reset function. Specifically, it can be implemented using a combination structure of a copper alloy spring and a plastic base, achieving automatic reset of the contact state through elastic deformation. The slider 51 refers to an arc-shaped protrusion structure set on the outer wall of the handle 5. Specifically, it can be integrally molded with the handle 5 using an injection molding process, forming a spatial fit with the second elastic contact 41 through its rotational motion trajectory.

[0063] Specifically, when the handle 5 rotates the valve 2 from the position of blocking the water passage to the position of opening the water passage, the slider 51 moves in a circular motion with the rotation axis 634. At the midpoint of the rotation stroke, the protrusion of the slider 51 begins to contact the cantilever end of the second elastic contact 41. As the rotation angle increases, the protrusion continuously applies a downward vertical pressure to the cantilever end, forcing the second elastic contact 41 to undergo elastic deformation until the predetermined stroke is reached. This mechanical linkage structure, through the correspondence between the rotation angle and the pressure transmission, ensures that the second microswitch 4 conducts the circuit only when the valve 2 is in the fully open state.

[0064] Compared to existing technologies, traditional solutions rely solely on water pressure to drive a single microswitch, posing a risk of false triggering. This solution achieves dual control through a mechanical linkage structure: the activation of the second microswitch 4 requires both the valve 2 to be fully open and the handle 5 to be rotated to the correct position simultaneously, effectively avoiding false triggering caused by aging parts or obstruction by foreign objects. The linear relationship between rotation angle and pressure transmission further facilitates precise control of the switch action sequence.

[0065] Through the above technical solution, this application achieves dual physical isolation control of the heating circuit. The second microswitch 4 will only be accurately triggered when the user actively rotates handle 5 to the fully open position and valve 2 is indeed in a water-connected state. This rigid mechanical interlocking mechanism fundamentally eliminates the possibility of circuit misoperation due to component failure or environmental factors, effectively preventing dry-burning accidents.

[0066] Reference Figures 1-3 , Figure 5 as well as Figure 9 This application further proposes that it also includes a switch base 6, on which two sets of rectangular slots 61 are arranged side by side for mounting the first micro switch 3 and the second micro switch 4 respectively.

[0067] The switch base 6 refers to the mounting base used to support and fix the micro switch. Specifically, it can be manufactured using injection molding to create a plastic substrate with a rectangular groove 61, the internal spatial layout of which is adapted to the structure of the housing 1. The rectangular groove 61 refers to a recessed area on the surface of the switch base 6, specifically formed using molding to create a rectangular groove matching the shape of the micro switch. Its depth and width can be adjusted according to the size of the micro switch, used to limit the lateral displacement of the switch. The limiting hook 611 refers to an elastic snap-fit ​​structure located at the upper end of the rectangular groove 61, specifically a plastic barb structure integrally molded with the switch base 6. By pressing down on the micro switch, it is snapped into the groove and locked by the hook, preventing the switch from coming out.

[0068] Specifically, the switch base 6 accommodates the first micro switch 3 and the second micro switch 4 via two sets of rectangular slots 61. The two sets of slots are arranged in parallel, and the spacing matches the internal space of the housing 1. During installation, the first micro switch 3 is embedded in the left rectangular slot 61 and fixed by the limiting barb 611, while the second micro switch 4 is installed in the right slot in the same way. This structure aligns the contact points of the two switches with the lever assembly 63 of the pressure drive unit and the slider 51 of the handle 5, respectively. After the switch base 6 is connected to the housing 1 by bolts, the first elastic contact 31 of the first micro switch 3 maintains a perpendicular alignment with the lever assembly 63, and the second elastic contact 41 of the second micro switch 4 makes contact with the rotation trajectory of the slider 51.

[0069] Compared with existing technologies, current control modules typically fix microswitches directly inside the housing 1 or install them separately using independent brackets, resulting in defects such as low assembly precision and false triggering due to contact misalignment. This solution achieves precise positioning and installation of dual switches through the integrated switch base 6 and rectangular slot 61 structure, avoiding circuit malfunctions caused by contact misalignment. At the same time, the limit hook 611 design simplifies the switch replacement and maintenance process.

[0070] Through the above technical solution, this application solves the problem of poor contact caused by poor installation stability of micro switches, ensuring that the two switches can still maintain precise alignment under the limited internal space of the housing 1, reducing the interference of water pressure fluctuations or mechanical vibrations generated during the operation of the handle 5 on the switch contacts, thereby improving the reliability of circuit control and extending the service life of the switch.

[0071] Reference Figure 6 and Figure 7 This application further proposes a pressure drive unit including a receiving groove 15 disposed on the housing 1. The receiving groove 15 is located on one side of the drainage channel 12 and the opening is upward. The receiving groove 15 is connected to the inner cavity of the drainage channel 12 through a second channel 16. An elastic diaphragm 17 is disposed in the receiving groove 15, and a push rod 171 is disposed at the upper end of the elastic diaphragm 17.

[0072] The accommodating groove 15 refers to the cavity structure for accommodating the elastic diaphragm 17, which can be integrally molded onto the housing 1 using injection molding to achieve a seal. The second channel 16 refers to the fluid channel connecting the drainage channel 12 and the accommodating groove 15, which can be a circular through-hole with a diameter ranging from 1 to 3 mm to achieve pressure transmission. The elastic diaphragm 17 refers to a sealing component with deformation capability, which can be made of silicone or rubber material to achieve the conversion between water pressure and mechanical motion. The push rod 171 refers to a rigid transmission component, which can be made of stainless steel or engineering plastic to achieve precise driving of the microswitch contacts.

[0073] Specifically, when water flows into the drainage channel 12, the water pressure is transmitted to the interior of the receiving tank 15 through the second channel 16. Under the action of water pressure, the elastic diaphragm 17 deforms upward and drives the push rod 171 to move vertically. The displacement of the push rod 171 is transmitted to the first micro switch 3 through the lever assembly 63, triggering the circuit to conduct. When the water flow stops or the pressure is insufficient, the elastic diaphragm 17 returns to its original position due to its elasticity, and the push rod 171 retracts to its initial position simultaneously, and the first micro switch 3 disconnects the circuit. This structure, through physical isolation design, ensures that the pressure drive unit only operates when water is actually flowing through the drainage channel 12, avoiding long-term pressure on the elastic diaphragm 17 from the continuous water pressure of the inlet pipe.

[0074] Compared to existing technologies, which place the pressure detection device in the inlet pipe, causing the elastic diaphragm to be subjected to tap water pressure for extended periods, this application places the receiving tank 15 on the side of the drainage channel 12, subjecting it to transient water pressure only during actual water discharge. Existing technologies use a single diaphragm to directly trigger a microswitch, while this application, through the mechanical amplification structure of the push rod 171 and lever assembly 63, reduces the requirements for the deformation of the elastic diaphragm 17 and achieves more precise switching control. The diaphragm cavity in existing technologies is directly exposed to flowing water and is susceptible to impurities, while this application, through the flow-limiting design of the second channel 16, effectively prevents particulate matter from entering the receiving tank 15.

[0075] Through the above technical solution, this application achieves precise correspondence between the pressure drive unit and the water flow state. When there is no water or insufficient water pressure in the drainage channel 12, the push rod 171 automatically resets to ensure reliable circuit disconnection. The elastic diaphragm 17 is only briefly pressurized during water discharge, significantly extending the service life of the sealing material. The orifice diameter control of the second channel 16 ensures both pressure transmission efficiency and avoids diaphragm jamming caused by impurity accumulation, forming a dual safety guarantee mechanism.

[0076] Reference 1- Figure 3 as well as Figure 5 This application further proposes that the switch base 6 is fixedly connected to the outer edge of the receiving groove 15, the switch base 6 is provided with a slide 62 coaxial with the top rod 171, the switch base 6 is provided with a lever assembly 63, the first micro switch 3 is provided with a first elastic contact 31, one end of the lever assembly 63 is located directly above the first elastic contact 31, and the other end is located directly above the top rod 171.

[0077] Specifically, the switch base 6 and the receiving groove 15 can be fixed with bolts or self-tapping screws. Fixing with self-tapping screws means using four self-tapping screws to secure the switch base 6 to the receiving groove 15, ensuring no leakage occurs when the water pressure in the drainage channel 12 changes. The slide 62 is a guide structure set along the axis of the push rod 171, which can be implemented as a straight groove or a tubular channel, used to limit the movement trajectory of the push rod 171 and prevent malfunction due to skew. The lever assembly 63 is a device that transmits mechanical force around a fulcrum, specifically implemented using a metal rod and a rotating shaft 634, converting the vertical displacement of the push rod 171 into pressure changes on the first elastic contact 31. The first elastic contact 31 is a conductive component inside the microswitch with deformable capabilities, specifically implemented using a copper alloy spring structure, switching the circuit on / off state through pressure changes in the lever assembly 63.

[0078] Specifically, when water flows into the drainage channel 12, the water pressure pushes the elastic diaphragm 17 to deform and drive the push rod 171 to move vertically along the slide rail 62. When the push rod 171 rises, the pressure is transmitted to the first elastic contact 31 through the lever assembly 63, triggering the first micro switch 3 to close and become energized. When the water flow stops or the pressure is insufficient, the elastic diaphragm 17 resets, causing the push rod 171 to descend. The lever assembly 63 releases the pressure on the first elastic contact 31, and the first micro switch 3 automatically disconnects. This structure links the water pressure drive with the circuit control through the lever assembly 63, achieving synchronous operation of the water flow status and the circuit on / off state. At the same time, the bolt sealing and the slide rail 62 form a double insurance mechanism to ensure the stability and sealing of the push rod 171's movement.

[0079] Compared to existing technologies, in existing solutions, the microswitch is directly pushed by the elastic diaphragm, causing the switch contacts to be subjected to water pressure impacts for extended periods. This solution, however, uses a lever assembly 63 to convert the water pressure drive into an indirect force, reducing the stress on the first elastic contact 31. Existing solutions lack a guiding structure between the elastic diaphragm and the switch, which can easily lead to uneven wear. This solution uses a slide rail 62 to limit the movement trajectory of the push rod 171, preventing seal failure caused by component misalignment. Existing solutions use a single fixing method for the switch base 6 and the housing 1. This solution uses a combination of bolt sealing and slide rail 62 to ensure both sealing and precise transmission of mechanical action.

[0080] Through the above technical solutions, this application effectively solves the problem of false triggering caused by the asynchronous deformation of the elastic diaphragm and the action of the microswitch, avoiding the risk of dry burning caused by the circuit remaining closed when the water flow is interrupted. The force transmission mechanism of the lever assembly 63 reduces the accuracy requirements for the deformation of the elastic diaphragm 17 and extends the service life of the pressure drive unit. The combined design of the slide 62 and the bolt sealing fixation improves the reliability of the push rod 171's action and prevents component displacement or leakage caused by water flow pressure fluctuations.

[0081] Reference Figure 7 and Figure 9 This application further proposes that two vertical ribs 151 are arranged parallel to each other on the outer wall of the receiving groove 15. An L-shaped notch 1511 is opened at the upper end of the vertical rib 151. The switch seat 6 is provided with a through hole that cooperates with the vertical rib 151. The switch seat 6 is provided with a support frame 64 that cooperates with the vertical rib 151. The support frame 64 is provided with a “7” shaped notch 641. The “7” shaped notch 641 and the L-shaped notch 1511 cooperate to form a connecting seat for connecting the lever assembly 63.

[0082] The vertical rib 151 refers to the longitudinal reinforcing structure set on the outer wall of the receiving groove 15, which can be realized by injection molding or metal stamping process. It is used to improve the structural strength of the receiving groove 15 and provide a positioning reference for the switch base 6. The L-shaped notch 1511 refers to the right-angled recess opened at the top of the vertical rib 151, which can be realized by milling or die forming. It is used to form a mating space with the "7"-shaped notch 641 of the support frame 64. The support frame 64 refers to the metal or plastic bracket fixed on the switch base 6, which can be realized by bolt connection or snap fastening. It is used to support the rotating shaft 634 of the lever assembly 63 and provide a rotation fulcrum. The "7"-shaped notch 641 refers to the right-angled zigzag opening on the support frame 64, which can be realized by stamping or injection molding. Together with the L-shaped notch 1511 of the vertical rib 151, it forms a closed connecting seat to prevent the lever assembly 63 from axially shifting during operation.

[0083] Specifically, during assembly, the vertical rib 151 passes through the through hole of the switch base 6 to achieve pre-positioning, and the support frame 64 engages with the L-shaped notch 1511 of the vertical rib 151 through the "7"-shaped notch 641, forming a stable connecting seat structure. The rotating shaft 634 of the lever assembly 63 is embedded in the connecting seat, so that its two ends are in contact with the push rod 171 and the first elastic contact 31, respectively. When the water pressure in the drainage channel 12 changes, the push rod 171 pushes the lever assembly 63 to rotate around the rotating shaft 634, thereby triggering or releasing the first micro switch 3. The mating structure of the vertical rib 151 and the support frame 64 not only simplifies the installation steps, but also reduces the vibration amplitude of the lever assembly 63 during operation through multi-point constraints.

[0084] Compared with existing technologies, the lever assembly 63 of traditional control modules is usually directly fixed to the housing 1 or switch base 6, lacking a dedicated connecting seat structure, which easily leads to loosening or misalignment of the rotating shaft 634 due to long-term vibration. This application forms a closed connecting seat by cooperating with the vertical rib 151 and the support frame 64, so that the rotating shaft 634 of the lever assembly 63 is always in a stable constrained state, avoiding the problem of false triggering of microswitches caused by component displacement.

[0085] Through the above technical solution, this application solves the problem of poor micro-switch contact caused by unstable installation of lever assembly 63, improves the reliability of control module in long-term use, and reduces production complexity through modular assembly design, ensuring that the sealing performance of water pressure drive unit and switch base 6 is not affected by the movement of lever assembly 63.

[0086] Reference Figure 5 and Figure 11 This application further proposes that the lever assembly 63 includes a pressure rod 631, with a first contact 632 cooperating with the first elastic contact 31 and a second contact 633 cooperating with the top rod 171 at both ends of the pressure rod 631, and a rotating shaft 634 cooperating with the connecting seat in the middle of the pressure rod 631.

[0087] The pressure rod 631 is a long, strip-shaped force-transmitting component with a lever function. It can be implemented using a metal rod or a high-strength plastic rod, and is used to convert the displacement of the push rod 171 into pressure on the microswitch contacts. The first contact 632 is a contact component located at the end of the pressure rod 631, and can be implemented using a copper protrusion structure, used to precisely press the elastic contacts of the microswitch. The second contact 633 is a contact component located at the other end of the pressure rod 631, and can be implemented using a wear-resistant rubber pad, used to buffer the impact force of the push rod 171. The rotating shaft 634 is a rotating support structure located in the middle of the pressure rod 631, and can be implemented using a stainless steel pin, forming a lever fulcrum by engaging with the notch of the connecting seat.

[0088] Specifically, when water pressure is generated in the drainage channel 12, the push rod 171 is pushed upward by the elastic diaphragm 17, pushing the second contact 633 to make the pressure rod 631 rotate around the shaft 634. At this time, the first contact 632 of the pressure rod 631 moves downward, precisely pressing the first elastic contact 31 to trigger the micro switch. When the water flow stops, the elastic diaphragm 17 resets, causing the push rod 171 to move downward. The pressure rod 631 rotates in the opposite direction under the action of gravity, and the first contact 632 releases the pressure on the micro switch. The shaft 634 and the notch of the connecting seat cooperate to form a stable rotation fulcrum, ensuring that the trajectory of the lever movement is controllable.

[0089] In some specific embodiments, anti-disengagement rings can be provided at both ends of the rotating shaft 634, a lubricating coating can be provided on the inner wall of the connecting seat, and the pressure rod 631 can adopt a segmented structure to adapt to different sizes of installation space.

[0090] Compared to existing technologies, traditional structures use an elastic diaphragm to directly press against the microswitch, causing the component to be subjected to unidirectional stress for a long time. This solution uses a lever structure to convert the linear motion of the push rod 171 into rotational motion, so that the microswitch contacts only bear intermittent pressure and avoid continuous deformation of the elastic component. The rotating shaft 634 support structure replaces the traditional cantilever beam stress method, effectively distributing the mechanical load.

[0091] Through the above technical solution, this application solves the problem of easy aging and failure of components in traditional water pressure controllers. The rotating shaft 634 structure of the lever assembly 63 reduces frictional loss of moving parts, and the split design of the bidirectional contacts avoids pressure concentration and extends the service life of the micro switch. The setting of the rotating fulcrum ensures a stable and reliable pressure transmission path and prevents false triggering caused by water flow impact.

[0092] Reference Figure 1 and Figure 9 This application further proposes that the upper end of the rectangular groove 61 is provided with a limiting barb 611 for fixing the first micro switch 3 and the second micro switch 4.

[0093] The rectangular groove 61 refers to a recessed structure for mounting the micro switch. It can be formed on the switch base 6 using injection molding, and its shape matches the micro switch housing to achieve a positioning function. The limiting hook 611 refers to an elastic snap-fit ​​structure located at the edge of the opening of the rectangular groove 61. It can be integrally molded from polycarbonate material, and its inwardly extending hook-shaped protrusion constrains the upper surface of the micro switch, preventing the switch from dislodging from its mounting position under vibration or water flow impact.

[0094] Specifically, during assembly, the first microswitch 3 and the second microswitch 4 are pressed into the two sets of rectangular slots 61, respectively. When the switch housing contacts the bottom of the slot, the inclined structure of the limiting hook 611 is compressed and undergoes elastic deformation. After the switch is fully installed, the hook returns to its initial state and locks the top edge of the switch. This structure constrains the microswitch in three directions: the bottom is supported by the bottom surface of the rectangular slot 61, the sidewalls are in contact with the slot walls, and the top is locked by the limiting hook 611. This fixing method ensures that the microswitch contacts maintain a stable contact pressure with the lever assembly 63, avoiding poor contact problems caused by switch displacement.

[0095] Compared to existing technologies, traditional microswitches are mostly fixed with screws or glue, which suffers from low assembly efficiency, difficult maintenance, and susceptibility to loosening due to vibration. This solution achieves tool-free rapid installation through the limit hook 611. While ensuring fixing strength, it allows for switch replacement by prying the hook with tools, significantly improving product maintainability.

[0096] Through the above technical solution, this application effectively solves the displacement problem of microswitches under long-term water flow impact, ensuring that the two microswitches always maintain a precise installation position in high temperature and high humidity environments, avoiding the risk of poor circuit contact or false triggering caused by loose switches, thereby improving the operational reliability of the water heater control module.

[0097] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0098] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0099] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A water heater control module, characterized in that, Includes a housing (1), and the two ends of the housing (1) are respectively provided with a water inlet channel (11) and a drainage channel (12) that are interconnected. The valve core assembly is provided between the water inlet channel (11) and the drain channel (12) for controlling the connection or closure of the passage between the water inlet channel (11) and the drain channel (12); It also includes a control circuit for controlling the water heater switch, wherein a first micro switch (3) and a second micro switch (4) are connected in series on the control circuit. A pressure drive unit is provided at one end of the drainage channel (12) of the housing (1). The pressure drive unit controls the first micro switch (3) to open or close by the water pressure of the water flow entering the drainage channel (12). Handle (5), the handle (5) is coaxially arranged with the valve core assembly, and the outer wall of the handle (5) is provided with a slider (51) for driving the second micro switch (4) to open or close.

2. The water heater control module according to claim 1, characterized in that, The water inlet channel (11) and the drainage channel (12) are staggered in height. The water inlet channel (11) and the drainage channel (12) are connected through the first channel (13). The housing (1) is provided with a mounting seat (14) for installing the valve core assembly.

3. A water heater control module according to claim 1, characterized in that, The valve core assembly includes a valve member (2), which has a passage for connecting the first channel (13) and the water inlet channel (11). The valve member (2) rotates to have a first position that connects the passage to the first channel (13) and the water inlet channel (11) and a second position that blocks the connection between the first channel (13) and the water inlet channel (11). The upper end of the valve member (2) is provided with a pin (21) for connecting the handle (5).

4. A water heater control module according to claim 1, characterized in that, The second micro switch (4) is provided with a second elastic contact (41). During the process of the handle (5) driving the valve (2) to rotate from the second position to the first position, the slider (51) rotates towards the second elastic contact (41) and applies downward pressure to the second elastic contact (41).

5. A water heater control module according to claim 3, characterized in that, It also includes a switch base (6), on which two sets of rectangular slots (61) are arranged side by side for mounting the first micro switch (3) and the second micro switch (4) respectively.

6. A water heater control module according to claim 5, characterized in that, The pressure drive unit includes a receiving groove (15) disposed on the housing (1). The receiving groove (15) is located on one side of the drainage channel (12) and the opening is upward. The receiving groove (15) is connected to the inner cavity of the drainage channel (12) through a second channel (16). An elastic membrane (17) is provided in the receiving groove (15), and a top rod (171) is provided at the upper end of the elastic membrane (17).

7. A water heater control module according to claim 6, characterized in that, The switch base (6) is fixedly connected to the outer edge of the receiving groove (15). The switch base (6) is provided with a slide (62) coaxial with the top rod (171). The switch base (6) is provided with a lever assembly (63). The first micro switch (3) is provided with a first elastic contact (31). One end of the lever assembly (63) is located directly above the first elastic contact (31), and the other end is located directly above the top rod (171).

8. A water heater control module according to claim 7, characterized in that, Two vertical ribs (151) are arranged parallel to each other on the outer wall of the receiving groove (15). An L-shaped notch (1511) is opened at the upper end of the vertical rib (151). A through hole that cooperates with the vertical rib (151) is provided on the switch seat (6). A support frame (64) that cooperates with the vertical rib (151) is provided on the switch seat (6). A "7" shaped notch (641) is provided on the support frame (64). The "7" shaped notch (641) and the L-shaped notch (1511) cooperate to form a connecting seat for connecting the lever assembly (63).

9. A water heater control module according to claim 8, characterized in that, The lever assembly (63) includes a pressure rod (631), with a first contact (632) cooperating with a first elastic contact (31) and a second contact (633) cooperating with a top rod (171) at both ends of the pressure rod (631), and a rotating shaft (634) cooperating with the connecting seat in the middle of the pressure rod (631).

10. A water heater control module according to claim 5, characterized in that, The upper end of the rectangular groove (61) is provided with a limiting barb (611) for fixing the first micro switch (3) and the second micro switch (4).

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