Temperature controlled water switch

Abstract

The application discloses a temperature-controlled water switch, which comprises a water inlet base, a valve core assembly, an elastic component, a top rod and a thermal expansion deformation element; the valve core assembly is locked to the water inlet base and forms a sealed cavity with the water inlet base; the water inlet base is provided with a water inlet channel and a water outlet channel; the water inlet channel and the water outlet channel are communicated with the sealed cavity; the thermal expansion deformation element generates deformation when the temperature changes to drive the top rod to move upward or downward; the top rod is connected with the valve core assembly and the thermal expansion deformation element respectively and pushes the valve core assembly upward or downward under the action of the thermal expansion deformation element to cut off or conduct the water inlet channel and the water outlet channel; the elastic component is in contact with the valve core assembly and the top rod respectively and provides elastic force to realize the reset of the top rod; the temperature-controlled water switch of the embodiment utilizes the surface temperature change of a steam generator in a steam type electric appliance to realize the on-off control of a water inlet channel and has the dry burning prevention function, thereby meeting the use requirement in specific application scenarios.

Description

Technical Field

[0001] This invention relates to the field of switch technology, and in particular to a temperature-controlled water switch. Background Technology

[0002] Temperature control switches are widely used in smart home appliances such as electric kettles, steam ovens, and egg steamers. However, current temperature control switches are only used to control the on / off state of the circuit. That is, when the water in the smart home appliance is boiled or boiled dry, if the temperature detected is higher than the preset temperature value, the moving and stationary contacts in the temperature control switch warp, breaking the circuit and stopping the circuit from continuing to heat.

[0003] For example, Chinese patent application CN216353955U discloses a lower switch thermostat with an integrated rocker structure and a steam box. It includes a base and an anti-dry-burning device mounted on the base. The base extends outwards integrally with a mounting bracket, on which a rocker is swaying. A bimetallic strip is located at the tail of the mounting bracket, and the bimetallic strip is linked to the anti-dry-burning device via the rocker in a swing-like linkage. A switch mounting position is provided on the mounting bracket, through which a toggle switch is swaying. One end of the toggle switch has a toggle part, and the other end is connected to the head of the rocker. A steam box is integrally mounted at the tail of the rocker corresponding to the bimetallic strip, and the steam box has a connection port for connecting a steam pipe. The anti-dry-burning device is an anti-dry-burning component and conductive circuit linked to the thermostat; that is, the thermostat contains an anti-dry-burning device, and when the thermostat detects a temperature higher than a preset temperature, the conductive circuit disconnects to cut off power.

[0004] For example, Chinese patent application CN112890588A discloses an egg steamer with a manual switch function, including an egg steamer body. The egg steamer body includes a lid, and a tray mechanism is provided inside the egg steamer body. A heating mechanism, a temperature controller, and a linkage mechanism are provided below the tray mechanism. The heating mechanism is electrically connected to the temperature controller, and the temperature controller is movably connected to the linkage mechanism. When the set temperature is reached, the temperature controller disconnects, the linkage mechanism resets, and the heating mechanism stops heating. Manual operation of the linkage mechanism is required to reconnect the internal circuit of the temperature controller so that the heating mechanism can resume heating.

[0005] Therefore, after extensive research and comparison of existing temperature control switches, the inventors discovered that the anti-dry-burning function in smart home appliances is usually implemented by disconnecting the circuit. However, in some usage scenarios, the cooking time is often not reached within the preset time, and the circuit is disconnected due to dry burning. Water needs to be added and the switch needs to be manually turned on and off again to continue cooking. Furthermore, there is a certain time difference between the occurrence of dry burning and the moment the circuit is disconnected. Often, when the circuit is disconnected, the water inside the appliance has completely evaporated, and the temperature inside the smart home appliance has reached a high level, making the appliance extremely easy to damage. Summary of the Invention

[0006] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a temperature-controlled water switch that automatically controls water addition, has an anti-dry-burning function, and is suitable for steam-type appliances such as steam ovens and egg steamers.

[0007] This invention provides a temperature-controlled water switch, comprising a water inlet base, a valve core assembly, an elastic member, a push rod, and a thermal expansion deformation element; wherein:

[0008] The valve core assembly is locked to the water inlet base and forms a sealed cavity with the water inlet base;

[0009] The water inlet base is provided with a water inlet channel and a water outlet channel; the water inlet channel and the water outlet channel are connected to the sealed cavity;

[0010] The thermal expansion deformation element deforms when the temperature changes, thereby causing the push rod to move upward or downward.

[0011] The push rod is connected to the valve core assembly and the thermal expansion deformation element respectively. Under the action of the thermal expansion deformation element, the valve core assembly is pushed upward or downward to block or open the water inlet channel and the water outlet channel.

[0012] The elastic member contacts the valve core assembly and the push rod respectively, providing an elastic force to achieve the reset of the push rod.

[0013] As a further embodiment of the present invention, the valve core assembly includes a valve core elastomer and a valve cover. The valve core elastomer is provided with a first convex ring on its outer circumference. The water inlet base and the valve cover are engaged and pressed against the first convex ring so that the valve core elastomer and the water inlet base form the sealing cavity.

[0014] As a further embodiment of the present invention, the valve core elastomer is provided with a second convex ring inwardly, and the top of the push rod is provided with an annular recess corresponding to the second convex ring. The second convex ring is inserted into the annular recess so that the push rod passes through the valve cover and engages with the valve core elastomer to form an integral whole.

[0015] As a further embodiment of the present invention, the water inlet base is provided with a sealing rib at the contact surface with the valve core elastomer, and a flared frustum connecting body is provided between the first convex ring and the second convex ring of the valve core elastomer. When the top rod moves downward, the frustum connecting body is compressed and deformed by force.

[0016] As a further embodiment of the present invention, the valve cover is provided with an integrally formed base plate, an annular protrusion and a support seat. The annular protrusion matches the shape of the base plate and is located on the outer edge of the base plate to form a receiving area for positioning the valve core elastomer together with the base plate. The base plate is provided with a first through hole and a plurality of threaded mounting holes. The push rod passes through the first through hole and is fastened to the valve core elastomer. The base plate is threadedly locked to the water inlet base through the threaded mounting holes. The support seat is located on the lower side of the base plate for fixing or supporting.

[0017] As a further embodiment of the present invention, the temperature-controlled water switch also includes a positioning bracket and a backstop component. The top rod ring is provided with a third convex ring. The backstop component is sleeved on the top rod to form a fixed locking position with the third convex ring for restricting the movement of the thermal expansion deformation element. The thermal expansion deformation element and the valve core assembly are respectively fixedly connected to the positioning bracket and have accommodating space for the movement of the top rod. The thermal expansion deformation element is limited at the fixed locking position so that it deforms when the temperature changes, causing the top rod to move upward or downward.

[0018] As a further embodiment of the present invention, the positioning bracket is arranged in a U-shape, and the top rod is located at the U-shaped opening of the positioning bracket. The thermal expansion deformation element is a bimetallic sheet. A slot is provided at the bottom of the U-shape of the positioning bracket. One end of the bimetallic sheet is provided with a positioning protrusion corresponding to the slot. The bimetallic sheet overlaps the positioning bracket, and the positioning protrusion is inserted into the slot. The other end of the bimetallic sheet is sleeved on the top rod and restricted at the fixed slot.

[0019] As a further embodiment of the present invention, the elastic member is configured as a spring. When the thermal expansion surface of the bimetallic strip is positioned facing the water inlet base, the spring is sleeved on the top rod and disposed within the valve core assembly. When the bimetallic strip is heated and bent downwards, it pulls the top rod and, under the action of the top rod, drives the valve core assembly to move downwards so that the water inlet channel and the water outlet channel are connected to form a continuous channel.

[0020] As a further embodiment of the present invention, the elastic member is configured as a spring. When the thermal expansion surface of the bimetallic strip is facing away from the water inlet base, the spring is sleeved on the top rod and located outside the valve core assembly. When the bimetallic strip is heated and bent upward, it pushes the top rod and, under the action of the top rod, drives the valve core assembly to move upward so that the water inlet channel and the water outlet channel are closed to form a closed channel.

[0021] As a further embodiment of the present invention, there is a height difference between the water inlet channel and the water outlet channel of the water inlet base, and the valve core assembly is located between the water inlet channel and the water outlet channel.

[0022] The embodiments of the present invention have at least the following beneficial effects:

[0023] Compared with existing technologies, the temperature-controlled water switch of this invention utilizes the surface temperature change of the steam generator within the steam-type appliance to control the opening and closing of the water supply channel. It features anti-dry-burning functionality, enabling the steam-type appliance to continuously and efficiently generate steam, meeting the needs of specific application scenarios, especially suitable for appliances such as steam ovens and egg steamers. This differs from existing temperature-controlled switches that control the opening and closing of circuits. In the specific implementation process, the thermal expansion deformation element deforms upon heating. The temperature of this deformation is obtained by contacting the surface temperature of the steam generator within the appliance; that is, the deformation of the thermal expansion deformation element is related to the surface temperature of the steam generator within the appliance. The push rod, the valve core assembly, and the elastic member are linked under the action of the thermal expansion deformation element, causing the valve core assembly to either close or open the water inlet channel and the water outlet channel. If a dry-burning state occurs, the thermal expansion deformation element deforms, the valve core assembly moves downward, connecting the water inlet channel and the water outlet channel. Water flows from the water inlet channel into the sealed cavity and then into the designated location within the appliance via the water outlet channel, allowing the appliance to continue operating normally with a fast response speed. Attached Figure Description

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0025] Figure 1 This is a three-dimensional structural schematic diagram of the temperature-controlled water switch according to an embodiment of the present invention;

[0026] Figure 2 This is a top view of the temperature-controlled water switch according to an embodiment of the present invention;

[0027] Figure 3 yes Figure 2 AA sectional structural view;

[0028] Figure 4 yes Figure 2BB sectional structural view;

[0029] Figure 5 This is an exploded structural diagram of the temperature-controlled water switch according to an embodiment of the present invention;

[0030] Figure 6 This is another cross-sectional view of the temperature-controlled water switch according to an embodiment of the present invention.

[0031] Explanation of reference numerals in the attached drawings: Water inlet base 100, water inlet channel 110, water outlet channel 120, sealing cavity 130, sealing rib 140, valve core assembly 200, valve core elastic body 210, first convex ring 211, second convex ring 212, frustum connector 213, valve cover 220, base plate 221, annular convex strip 222, support seat 223, receiving area 224, first through hole 225, threaded mounting hole 226, elastic member 300, push rod 400, annular notch 410, third convex ring 420, fixing slot 430, thermal expansion deformation element 500, positioning protrusion 510, positioning bracket 600, bayonet 610, anti-reverse retainer 700. Detailed Implementation

[0032] 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 are only used to explain the present invention, and should not be construed as limiting the present invention.

[0033] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 limiting this invention.

[0034] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0035] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0036] Smart home appliances typically employ circuit disconnection to prevent dry burning. However, in some usage scenarios, the cooking time may not reach the preset duration, leading to dry burning and circuit disconnection. This necessitates adding water and manually switching the appliance on and off again to continue cooking. Furthermore, there is a time lag between the onset of dry burning and the circuit disconnection; often, by the time the circuit disconnects, all the water inside the appliance has evaporated, and the appliance has reached a high temperature, making it highly susceptible to damage. Therefore, in steam appliances such as steam ovens and egg steamers, the temperature-controlled water switch provided in this invention enables automatic water addition.

[0037] Figures 1-5 The diagram illustrates the structure of a temperature-controlled water switch according to an embodiment of the present invention. Specifically, an embodiment of the present invention provides a temperature-controlled water switch, including a water inlet base 100, a valve core assembly 200, an elastic member 300, a push rod 400, and a thermal expansion deformation element 500; wherein:

[0038] The valve core assembly 200 is locked to the water inlet base 100 and forms a sealed cavity 130 with the water inlet base 100;

[0039] The water inlet base 100 is provided with a water inlet channel 110 and a water outlet channel 120; the water inlet channel 110 and the water outlet channel 120 are connected to the sealed cavity 130;

[0040] The thermal expansion deformation element 500 deforms when the temperature changes, thereby driving the push rod 400 to move upward or downward.

[0041] The push rod 400 is connected to the valve core assembly 200 and the thermal expansion deformation element 500 respectively. Under the action of the thermal expansion deformation element 500, it pushes the valve core assembly 200 upward or downward to cut off or open the water inlet channel 110 and the water outlet channel 120.

[0042] The elastic member 300 contacts the valve core assembly 200 and the push rod 400 respectively, providing an elastic force to achieve the reset of the push rod 400.

[0043] Compared with existing technologies, the temperature-controlled water switch of this invention utilizes the surface temperature change of the steam generator within the steam-type appliance to control the on / off state of the water supply channel. It features anti-dry-burning functionality, enabling the steam-type appliance to generate steam continuously, quickly, and efficiently, meeting the needs of specific application scenarios, especially suitable for appliances such as steam ovens and egg steamers. This differs from existing temperature-controlled switches that control the on / off state of the circuit. In the specific implementation process, the thermal expansion deformation element 500 deforms upon heating. The temperature of this deformation is obtained by contacting the surface temperature of the steam generator within the appliance, i.e., the deformation of the thermal expansion deformation element 500... The change is related to the surface temperature of the steam generator inside the appliance. The push rod 400, valve core assembly 200 and elastic member 300 are linked together under the action of thermal expansion deformation element 500, so that valve core assembly 200 can cut off or open the water inlet channel 110 and water outlet channel 120. If dry burning occurs, thermal expansion deformation element 500 deforms, valve core assembly 200 moves downward, water inlet channel 110 and water outlet channel 120 are connected, water enters the sealed cavity 130 from water inlet channel 110 and flows into the designated position inside the appliance through water outlet channel 120, so that the appliance can continue to operate normally and the response speed is fast.

[0044] In a preferred embodiment, such as Figure 3-5 As shown, the valve core assembly 200 includes a valve core elastomer 210 and a valve cover 220. The valve core elastomer 210 has a first convex ring 211 circumferentially arranged around its outer edge. The water inlet base 100 and the valve cover 220 are engaged and pressed together to form a sealed cavity 130 between the valve core elastomer 210 and the water inlet base 100. It can be understood that, from top to bottom, the components are the water inlet base 100, the valve core elastomer 210, and the valve cover 220. The valve core elastomer 210 is disposed between the water inlet base 100 and the valve cover 220. Since the first convex ring 211 has a certain elasticity, the valve cover 220 and the water inlet base 100 are engaged and press the valve core elastomer 210 in place, forming a sealed cavity 130 between the valve core elastomer 210 and the water inlet base 100. This sealed cavity 130 is connected to the water inlet channel 110 and the water outlet channel 120 of the water inlet base 100.

[0045] In a preferred embodiment, such as Figure 3-5As shown, the valve core elastic body 210 has a second convex ring 212 circumferentially arranged inwards, and the top of the push rod 400 has an annular notch 410 corresponding to the second convex ring 212. The second convex ring 212 is inserted into the annular notch 410 so that the push rod 400 passes through the valve cover 220 and engages with the valve core elastic body 210 to form an integral unit; that is, the push rod 400 and the valve core elastic body 210 form an integral unit. When the push rod 400 moves up and down, it drives the valve core elastic body 210 to move in tandem, and the valve core elastic body 210 undergoes elastic deformation under force. When the inlet channel 110 and outlet channel 120 are closed, the valve core elastic body 210 abuts against the inlet channel 110 or outlet channel 120, thus closing the connected channels. When the inlet channel 110 and outlet channel 120 are open, the valve core elastic body 210 is moved downward by the push rod 400 and undergoes elastic deformation, thus connecting the inlet channel 110, the sealing cavity 130 and the outlet channel 120, allowing external water to flow into the designated position inside the appliance through this temperature-controlled water switch, preventing dry burning.

[0046] In a preferred embodiment, such as Figure 3-5 As shown, the water inlet base 100 has a sealing rib 140 protruding at the contact surface with the valve core elastomer 210. A flared frustum connector 213 is provided between the first convex ring 211 and the second convex ring 212 of the valve core elastomer 210. When the push rod 400 moves downward, the frustum connector 213 is compressed and deformed by force. Since the valve core elastomer 210 has a certain elasticity, during assembly, the sealing rib 140 of the water inlet base 100 presses down on the valve core elastomer 210, achieving good sealing performance. The frustum connector 213 is set in a flared shape. When the push rod 400 moves downward, the frustum connector 213 is compressed and deformed by force. When the push rod 400 moves upward, the frustum connector 213 can return to its original position, exhibiting good elastic deformation performance.

[0047] In a preferred embodiment, such as Figure 3-5As shown, the valve cover 220 has an integrally formed base plate 221, an annular protrusion 222, and a support base 223. The annular protrusion 222 matches the shape of the base plate 221 and is located on the outer edge of the base plate 221 to form a receiving area 224 for positioning the valve core elastomer 210. The base plate 221 has a first through hole 225 and multiple threaded mounting holes 226. The push rod 400 passes through the first through hole 225 and is fastened to the valve core elastomer 210. The base plate 221 is threadedly locked to the water inlet base 100 through the threaded mounting holes 226. The support base 223 is located on the lower side of the base plate 221 for fixing or supporting. During assembly, the valve core elastomer 210 is placed on the valve cover 220, and the annular protrusion 222... The receiving area 224 formed by the base plate 221 and the base plate 221 coincides with the first protrusion 211 on the lower side of the valve core elastomer 210, which plays a positioning role. Before / after assembling the valve core elastomer 210 and the valve cover 220, the push rod 400 can be inserted into the second protrusion 212 in the valve core elastomer 210 to form a linkage. The push rod 400 passes through the first through hole 225 of the valve cover 220. Then, the water inlet base 100 is covered, and the lower side of the water inlet base 100 contacts the first protrusion 211 of the valve core elastomer 210. The valve cover 220 and the valve core elastomer 210 are locked on the water inlet base 100 by using self-tapping screws, thereby forming a sealed cavity 130 between the valve core elastomer 210 and the water inlet base 100.

[0048] In a preferred embodiment, such as Figure 1-6 As shown, the temperature-controlled water switch may also include a positioning bracket 600 and a backstop component 700. The push rod 400 is circumferentially provided with a third protrusion 420. The backstop component 700 is sleeved on the push rod 400 to form a fixed locking position 430 with the third protrusion 420 to limit the movement of the thermal expansion deformation element 500. The thermal expansion deformation element 500 and the valve core assembly 200 are respectively fixedly connected to the positioning bracket 600, and a space is provided for the push rod 400 to move. The thermal expansion deformation element 500 is limited at the fixed locking position 430 so that it deforms when the temperature changes, causing the push rod 400 to move upward or downward. It can be understood that the positioning bracket 600 serves a connecting and fixing function; the thermal expansion... The thermal expansion deformation element 500 expands and deforms when heated, requiring a certain amount of space to cooperate with the push rod 400 to realize the displacement of the valve core elastomer 210 in the valve core assembly 200. Compared with the fixed mounting structure directly set on the push rod 400 to limit the thermal expansion deformation element 500, the fixed locking position 430 formed by the anti-reverse insert 700 and the third convex ring 420 can assemble the thermal expansion deformation element 500 more flexibly and has stronger expandability. That is, the anti-reverse insert 700 and the third convex ring 420 cooperate to limit the range of motion of the thermal expansion deformation element 500, so that when the thermal expansion deformation element 500 bends and deforms, it can push the push rod 400 in linkage.

[0049] In a preferred embodiment, such as Figure 1-5 As shown, the positioning bracket 600 is U-shaped, and the top rod 400 is located at the U-shaped opening of the positioning bracket 600. The thermal expansion deformation element 500 is a bimetallic sheet. A slot 610 is provided at the bottom of the U-shape of the positioning bracket 600. One end of the bimetallic sheet has a positioning protrusion 510 corresponding to the slot 610. The bimetallic sheet overlaps the positioning bracket 600, and the positioning protrusion 510 is engaged with the slot 610. The other end of the bimetallic sheet is sleeved on the top rod 400 and restricted at the fixed position 430. It can be understood that the bimetallic sheet is composed of two or more metals or other materials with suitable properties. A composite material, based on the bending characteristics of bimetals, will deform and bend when two or more bimetallic strips with different coefficients of thermal expansion are heated; the support seat 223 of the valve cover 220 is locked to the positioning bracket 600 by self-tapping screws, one end of the bimetallic strip is fixed to the positioning bracket 600, and the other end is limited to the fixing position 430 of the top rod 400; based on the characteristics of the bimetallic strip, the positioning bracket 600 is set into a U-shaped structure, which on the one hand, it is well connected and fixed to the bimetallic strip, and on the other hand, it can provide a certain amount of space for the bimetallic strip and the top rod 400 to move.

[0050] Depending on the location of the elastic member 300 within the temperature control switch, temperature water switches can be classified into normally open and normally closed types. For example... Figure 2-3 This shows a normally open temperature-controlled water switch. For example... Figure 6 This is a normally closed temperature-controlled water switch. A detailed explanation follows.

[0051] like Figure 2-3As shown, this is a normally open temperature-controlled water switch. The elastic component 300 is set as a spring. When the thermal expansion surface of the bimetallic strip faces away from the water inlet base 100, the spring is sleeved on the push rod 400 and located outside the valve core assembly 200. When the bimetallic strip is heated and bent upwards, it pushes the push rod 400, and under the action of the push rod 400, it drives the valve core assembly 200 to move upwards, so that the water inlet channel 110 and the water outlet channel 120 are closed to form a closed channel. Specifically, the spring is located outside the valve core assembly 200, and the two ends of the spring abut against the valve cover 220 and the third convex ring 420, respectively. Due to the elasticity of the spring, the push rod 400 moves downwards, and the valve core elastic body 210 connected to the push rod 400 also moves downwards. The bimetallic strip is moved downwards, connecting the inlet channel 110 and the outlet channel 120 via the sealed cavity 130, while the temperature water switch remains normally open. At this time, the thermal expansion surface of the bimetallic strip faces away from the inlet base 100, meaning the thermal expansion surface of the bimetallic strip is positioned downwards. When the temperature exceeds the preset range, the bimetallic strip is heated and bent upwards, pushing the push rod 400 upwards. The spring is compressed, and the valve core elastic body 210 also moves upwards, disconnecting the inlet channel 110 and the outlet channel 120 of the inlet base 100, creating a closed channel, i.e., a shut-off state. When the temperature returns to the preset range, the bimetallic strip returns to its original shape, the spring resets, and the push rod 400 moves downwards, opening the channel.

[0052] like Figure 6 As shown, this is a normally closed temperature-controlled water switch. The elastic component 300 is set as a spring. When the thermal expansion surface of the bimetallic strip faces the water inlet base 100, the spring is sleeved on the push rod 400 and is located inside the valve core assembly 200. When the bimetallic strip is heated and bent downwards, it pulls the push rod 400, and under the action of the push rod 400, it drives the valve core assembly 200 to move downwards so that the water inlet channel 110 and the water outlet channel 120 are connected to form a continuous channel. Specifically, the spring is located inside the valve core assembly 200, which is also inside the valve core elastic body 210. The two ends of the spring abut against the valve cover 220 and the valve core elastic body 210, respectively. Due to the elasticity of the spring, the valve core elastic body 210 moves upwards, thus opening the passage between the water inlet channel 110 and the water outlet channel 120. When the temperature is cut off, the temperature water switch remains in a normally closed state. At this time, the thermal expansion surface of the bimetallic strip is installed facing the water inlet base 100, that is, the thermal expansion surface of the bimetallic strip is set at the top. When the temperature exceeds the preset range, the bimetallic strip is heated and bent downward, pulling the top rod 400 downward. The spring is compressed, and the valve core elastic element moves downward, connecting the water inlet channel 110, the sealing cavity 130, and the water outlet channel 120 of the water inlet base 100. This is a connected channel, that is, a conductive state, allowing water to flow through this temperature control switch into the designated location in the appliance. When the temperature returns to the preset range, the bimetallic strip returns to its original shape, the spring resets, and pushes the valve core elastic element upward. The top rod 400 moves upward, and the temperature control switch returns to the normally closed state.

[0053] Normally open and normally closed temperature water switches can be flexibly designed and used according to different application scenarios, which will not be elaborated here.

[0054] In a preferred embodiment, such as Figure 1-5 As shown, there is a height difference between the inlet channel 110 and the outlet channel 120 of the inlet base 100, and the valve core assembly 200 is located between the inlet channel 110 and the outlet channel 120; Figure 3 As shown, a sealed cavity 130 is formed between the valve core elastic element and the water inlet base 100. Water enters the sealed cavity 130 through the water inlet channel 110 and then flows out through the water outlet channel 120. The water inlet channel 110 is located on the side wall of the water inlet base 100, and the water outlet channel 120 is located on the top of the water inlet base 100. The water inlet channel 110 is set lower than the water outlet channel 120. The valve core elastic element can be moved upward to block the water inlet channel 110.

[0055] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A temperature controlled water switch, characterized in that, The utility model provides a water inlet base, valve core assembly, elastic component, top rod and thermal expansion deformation element, wherein: The valve core assembly is locked to the water inlet base and forms a sealed cavity with the water inlet base; The water inlet base is provided with a water inlet channel and a water outlet channel, and the water inlet channel and the water outlet channel are communicated with the sealed cavity; The thermal expansion deformation element generates deformation to drive the top rod to move upward or downward when the temperature changes; The top rod is connected with the valve core assembly and the thermal expansion deformation element respectively, and drives the valve core assembly to move upward or downward under the action of the thermal expansion deformation element to cut off or conduct the water inlet channel and the water outlet channel; The elastic component is in contact with the valve core assembly and the top rod respectively, and provides elastic force to reset the top rod; The top rod is provided with a third protruding ring, and a retreat-stopping sub-element is sleeved on the top rod to form a fixed clamping position for limiting the activity of the thermal expansion deformation element, the thermal expansion deformation element and the valve core assembly are fixedly connected with the positioning support respectively and leave a containing space for the activity of the top rod, and the thermal expansion deformation element is limited at the fixed clamping position to generate deformation to drive the top rod to move upward or downward when the temperature changes.

2. The temperature-controlled water switch of claim 1, wherein The valve core assembly includes a valve core elastic body and a valve cover, the valve core elastic body is provided with a first protruding ring outward, and the water inlet base and the valve cover press the first protruding ring to make the valve core elastic body form the sealed cavity with the water inlet base.

3. The temperature-controlled water switch of claim 2, wherein, The valve core elastic body is provided with a second protruding ring inward, the top of the top rod is concave with an annular notch corresponding to the second protruding ring, the second protruding ring is clamped into the annular notch to make the top rod penetrate into the valve cover and be integrated with the valve core elastic body.

4. The temperature-controlled water switch of claim 3, wherein The water inlet base is provided with a sealing rib at the contact surface with the valve core elastic body, the first protruding ring and the second protruding ring of the valve core elastic body are provided with a trumpet-shaped truncated cone connecting body, and the truncated cone connecting body is compressed and deformed under stress when the top rod moves downward.

5. The temperature-controlled water switch of claim 2, wherein The valve cover is provided with an integrally formed base plate, an annular protruding strip and a supporting seat, the annular protruding strip is consistent with the shape of the base plate, and the annular protruding strip is located at the outer edge of the base plate to form a containing area for positioning the valve core elastic body together with the base plate, the base plate is provided with a first through hole and a plurality of threaded mounting holes, the top rod penetrates through the first through hole to be connected with the valve core elastic body, the base plate is screwed and locked with the water inlet base through the threaded mounting holes, and the supporting seat is located at the lower side of the base plate for fixing or supporting.

6. The temperature-controlled water switch of claim 1, wherein The positioning support is provided in a U-shaped structure, and the top rod is located at the U-shaped opening of the positioning support, the thermal expansion deformation element is a bimetallic strip, the U-shaped bottom of the positioning support is provided with a bayonet, one end of the bimetallic strip is provided with a positioning protrusion corresponding to the bayonet, the bimetallic strip is overlapped on the positioning support, and the positioning protrusion is clamped into the bayonet, and the other end of the bimetallic strip is sleeved on the top rod and limited at the fixed clamping position.

7. The temperature-controlled water switch of claim 6, wherein The elastic member is arranged as a spring element, when the thermal expansion surface of the bimetallic strip is arranged towards the water inlet base, the spring element is sleeved on the top rod, and the spring element is arranged in the valve core assembly, when the bimetallic strip is bent and deformed downward by heat, the top rod is pulled, and the valve core assembly is driven to move downward by the top rod to make the water inlet channel and the water outlet channel conductive to form a continuous channel.

8. The temperature-controlled water switch of claim 6, wherein, The elastic member is arranged as a spring element, when the thermal expansion surface of the bimetallic strip is arranged towards the water inlet base, the spring element is sleeved on the top rod, and the spring element is arranged in the valve core assembly, when the bimetallic strip is bent and deformed upward by heat, the top rod is pushed, and the valve core assembly is driven to move upward by the top rod to make the water inlet channel and the water outlet channel cut off to form a closed channel.

9. The temperature-controlled water switch of claim 1, wherein, The water inlet channel and the water outlet channel of the water inlet base have a height difference, and the valve core assembly is located between the water inlet channel and the water outlet channel.

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