Temperature controller and heating device adopting same
By using ceramic plates and thermally conductive silicone in the thermostat for insulation and thermal conductivity, the risk of electrical conductivity when the thermostat comes into contact with high-temperature components is solved, achieving efficient insulation and thermal conductivity, improving the safety and response speed of the thermostat, and reducing production costs.
Patent Information
- Application Number
- CN202520062470.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-09
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-01-09
AI Technical Summary
Existing thermostats pose a risk of electrical conductivity when in contact with high-temperature components, leading to electrical short circuits and fire hazards, and lack effective heat insulation or insulation protection measures.
Using ceramic sheets as insulation material, designed to contact bimetallic sheets, and featuring an arc-shaped surface and groove structure in the heat-conducting part, combined with thermally conductive silicone, it achieves the dual functions of insulation and heat conduction, enhancing safety.
It effectively prevents electrical short circuits and fires, improves the response speed and control accuracy of the thermostat, reduces manufacturing costs, extends service life, and enhances reliability and durability.
Smart Images
Figure CN223842834U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a temperature controller and a heating device using the temperature controller. Background Technology
[0002] Thermostats, as a common electrical control device, are widely used in various household appliances and industrial equipment to control the temperature of the equipment. For example, in products such as electric heaters, electric kettles, and air conditioners, the function of a thermostat is to monitor the ambient or equipment temperature, automatically switch the circuit on and off, and maintain the temperature within the set range.
[0003] Traditional thermostats typically consist of a housing, a bimetallic strip, a push rod, a conductive spring, and terminals. The bimetallic strip is one of the core components of the thermostat; it bends when the temperature changes. When the temperature reaches the set value, it pushes the conductive spring via the push rod, thereby opening or closing the circuit and controlling the temperature.
[0004] However, existing bimetallic thermostat designs carry certain risks, particularly when in contact with heating elements or other high-temperature components. Contact between the bimetallic strip and the heating element can lead to electrical conductivity. Such contact could cause electrical short circuits, component damage, or even fires. Furthermore, the insulation properties of materials may change at high temperatures, increasing the risk of electrical malfunctions.
[0005] Therefore, existing thermostats lack effective heat insulation or thermal insulation protection measures to avoid electrical conductivity problems when the bimetallic strip comes into contact with high-temperature components, thus reducing safety hazards during use. Utility Model Content
[0006] The primary objective of this invention is to provide a temperature controller that can effectively conduct heat, provide insulation, and enhance safety.
[0007] The second objective of this invention is to provide a heating device that enhances safety.
[0008] The primary objective of this invention is achieved as follows:
[0009] A temperature controller includes a housing, a bimetallic strip, a push rod, a first terminal, a conductive spring, and a second terminal, wherein the conductive spring is disposed inside the housing;
[0010] The first terminal is placed inside the housing, one end of the first terminal is connected to a conductive spring, and the other end of the first terminal extends out of the housing to form a first wiring terminal.
[0011] The second terminal is placed inside the housing, with one end of the second terminal located above the conductive spring to form a contact end, and the other end of the second terminal extending out of the housing to form a second wiring terminal;
[0012] The bimetallic strip and push rod are placed inside the housing. One end of the push rod abuts against the conductive spring, and the other end of the push rod abuts against the bimetallic strip. The housing also includes a ceramic sheet. The housing is located at the opening corresponding to the bimetallic strip. The ceramic sheet is placed inside the housing. One end of the ceramic sheet abuts against the bimetallic strip, and the other end of the ceramic sheet extends out of the opening to form a heat-conducting part.
[0013] As a good insulating material, ceramic discs play an effective insulating role in thermostats. They can prevent electrical conductivity risks and thus avoid safety hazards such as electrical short circuits or fires that may be caused by the thermostat coming into contact with high-temperature components.
[0014] The ceramic plate not only has excellent insulation properties but also high thermal conductivity. Placed inside the thermostat and in contact with the bimetallic strip, it facilitates rapid heat conduction, thereby improving the thermostat's response speed and control accuracy. This ensures that the thermostat can quickly adjust and accurately control the circuit's on / off state in response to temperature changes.
[0015] Compared to other thermostats that require complex insulation and thermal isolation designs, this invention achieves both thermal insulation and thermal insulation functions through a simple ceramic plate structure, reducing manufacturing costs and simplifying design and production processes.
[0016] The primary objective of this utility model can also be achieved by the following technical measures:
[0017] Furthermore, the surface of the heat-conducting part is an arc-shaped surface.
[0018] The curved surface design of the ceramic heat-conducting part matches the curvature of the heating element, allowing the ceramic plate to fit more tightly against the heating element. This optimized design not only increases the contact area between the ceramic plate and the heating element but also enhances the heat transfer efficiency, thereby improving the thermal conductivity of the thermostat and ensuring that the thermostat can respond quickly to temperature changes and accurately control the temperature during operation.
[0019] The curved surface matches the curvature of the heating element, effectively reducing heat conduction loss due to poor contact and ensuring minimal heat loss during the transfer of heat from the heating element to the ceramic plate and then to the bimetallic strip. This design improves heat conduction efficiency, enabling the thermostat to function more efficiently, respond faster, and control temperature more precisely.
[0020] Although the heat-conducting part of the ceramic plate is in close contact with the heating element, the ceramic plate itself is an excellent insulator, which effectively prevents the risk of electrical conductivity that may occur when the bimetallic strip comes into contact with the heating element. Under high-temperature conditions, the ceramic plate can ensure both effective heat conduction and the safety of electrical components, avoiding safety issues such as electrical short circuits caused by overheating or direct contact with the heating element, as seen in traditional thermostats.
[0021] The ceramic disc possesses excellent high-temperature resistance, corrosion resistance, and aging resistance, maintaining stable performance during long-term use, further improving the reliability and durability of the thermostat. This means that the thermostat of this invention can operate stably for extended periods in harsher environments, extending the product's lifespan.
[0022] Furthermore, the heat-conducting part is spaced apart with slots.
[0023] The surface of the heat-conducting part is designed with grooves, which allows heat to be distributed more evenly on the surface of the ceramic plate. The groove structure helps to reduce the phenomenon of heat concentration in a small area, thereby avoiding local overheating, improving the overall heat conduction efficiency, and enabling the thermostat to control the temperature more stably, avoiding malfunctions caused by uneven temperature.
[0024] Ceramic materials are prone to stress due to thermal expansion at high temperatures. By designing grooves in the heat-conducting parts, the thermal expansion pressure caused by temperature changes can be effectively alleviated, preventing the ceramic sheet from cracking or deforming, and increasing its high-temperature resistance and thermal shock resistance. The groove design also contributes to the stability of the ceramic sheet in high-temperature environments, improving the reliability of the temperature controller.
[0025] The slot design further optimizes the contact between the ceramic plate and the heating element. Through the slot's spacing, the ceramic plate can more flexibly adapt to the surface shape of the heating element, enhancing its fit and improving heat transfer efficiency.
[0026] The slot design improves functionality while reducing the overall thickness and weight of the ceramic plate, thus reducing material usage and production costs. This allows the thermostat to maintain efficient heat conduction and insulation while possessing a lighter structure, meeting the miniaturization and low-cost requirements of modern electronic products.
[0027] The slot not only optimizes heat conduction but also makes the ceramic plate more stable when facing high temperatures and large temperature differences. The combination of the ceramic's insulating properties and the slot design ensures that the thermostat can operate continuously and stably under high-temperature conditions.
[0028] Furthermore, it also includes thermally conductive silicone, the surface of which is arc-shaped, and the back of which is provided with spaced retaining ribs. The retaining ribs are inserted into the slots, and the thermally conductive silicone and the ceramic sheet are connected together.
[0029] The curved surface design of the thermally conductive silicone matches the curved surface of the thermally conductive part of the ceramic plate, allowing it to better conform to the contact surface between the heating element and the ceramic plate, thus achieving more efficient heat conduction. The addition of thermally conductive silicone improves the thermal contact effect between the ceramic plate and the heating element, further enhancing the thermal response speed and control accuracy of the thermostat.
[0030] The rib design and slotted fit ensure a secure connection between the thermally conductive silicone and the ceramic plate, preventing the components from loosening or detaching due to temperature changes or vibrations. This stable connection structure enhances the reliability of the thermostat, ensuring its stability and durability during long-term use.
[0031] Thermally conductive silicone, as a flexible material, can effectively mitigate the thermal expansion problem of thermostats in high-temperature operating environments. Its combination with ceramic plates reduces stress caused by differences in the thermal expansion coefficients of different materials, making the thermostat components more adaptable to high-temperature environments and reducing the risk of damage due to thermal expansion.
[0032] Thermally conductive silicone not only provides excellent thermal conductivity but also further enhances the insulation of the overall component, ensuring the safety of the thermostat's electrical parts. It effectively isolates the ceramic plate from other electrical components, preventing electrical short circuits or conductivity problems, especially at high temperatures, thus increasing the thermostat's safety.
[0033] The use of thermally conductive silicone effectively improves the overall thermal stability and durability of the thermostat, preventing malfunctions caused by poor contact or excessive temperature fluctuations. Simultaneously, the silicone material has excellent anti-aging properties, extending the thermostat's lifespan.
[0034] Furthermore, the ceramic sheet is a superconducting ceramic sheet.
[0035] Superconducting ceramic sheets have a much higher thermal conductivity than conventional ceramic sheets, enabling them to conduct heat more efficiently. By using superconducting ceramic sheets, temperature controllers can respond to temperature changes more quickly and control the temperature more precisely. The thermal conductivity of superconducting ceramic sheets in high-temperature environments allows the temperature controller to reach the set operating temperature in a shorter time, improving temperature control efficiency.
[0036] Superconducting ceramic sheets possess excellent high-temperature resistance, maintaining their stability and thermal conductivity even at high temperatures. This allows the temperature controller to operate stably and continuously at higher operating temperatures without performance degradation or component damage due to thermal fatigue or overheating. For applications requiring high-temperature control, using superconducting ceramic sheets can significantly extend the lifespan of the temperature controller.
[0037] Superconducting ceramic sheets exhibit excellent thermal expansion adaptability, maintaining stable physical properties even under extreme temperature variations. Compared to traditional ceramic sheets, superconducting ceramic sheets are better able to adapt to thermal expansion and stress caused by temperature changes, reducing the risk of damage due to temperature variations.
[0038] In addition to their excellent thermal conductivity, superconducting ceramic sheets also possess good insulation properties. This means that using superconducting ceramic sheets in thermostats can further improve electrical safety, avoid electrical faults or conductive risks caused by overheating or temperature differences, and ensure the safety of the thermostat in high-temperature operating environments.
[0039] Superconducting ceramic sheets possess strong anti-aging properties, maintaining their thermal conductivity and structural stability during prolonged high-temperature operation. While traditional ceramic sheets may experience thermal degradation and performance decline with increasing usage time, superconducting ceramic sheets maintain high thermal conductivity over long-term use, reducing the maintenance requirements of temperature controllers.
[0040] The second objective of this utility model is achieved as follows:
[0041] A heating device includes a heating tube, one end of which is a water inlet and the other end of which is a water outlet. The heating tube and a thermostat are electrically connected to form a heating circuit. The heat-conducting part of the thermostat is in close contact with the outer wall of the heating tube. When the bimetallic strip of the thermostat reaches the limit temperature, the bimetallic strip deforms and immediately disconnects the heating circuit of the heating tube.
[0042] Enhanced safety: When the temperature of the heating element exceeds the set limit, the deformation of the bimetallic strip immediately disconnects the heating circuit, thus preventing the heating element from overheating or becoming excessively hot. This design effectively avoids equipment damage, fire, or other safety accidents caused by overheating, enhancing the safety of the heating device.
[0043] The bimetallic strip of the thermostat deforms when the heating element reaches its set temperature limit, disconnecting the heating circuit and precisely controlling the heating element's operating temperature to prevent it from exceeding the safe range. This precise temperature control design ensures stable operation of the heating device and automatically shuts it down when the set temperature is reached, improving the reliability of the temperature control.
[0044] Prolonged exposure of heating elements to excessively high temperatures can lead to equipment aging, damage, or decreased efficiency. By promptly disconnecting the circuit to prevent overheating of the heating elements, the risk of damage due to overheating is effectively reduced, extending the lifespan of the heating device.
[0045] Prolonged overheating of the heating element can not only damage the element itself but also affect the normal operation of other components. The automatic power-off function of the thermostat effectively prevents the overheating of the heating element from affecting other electrical components, reducing equipment failure rates and improving overall system stability and reliability.
[0046] By directly contacting the heat-conducting part of the thermostat with the outer wall of the heating element, the thermostat can more accurately sense the temperature changes of the heating element, thereby achieving efficient and precise temperature control.
[0047] The heating device features an automatic power-off design. When the bimetallic strip of the thermostat reaches its limit temperature, the circuit is automatically disconnected, reducing the need for manual operation and improving convenience and safety during use.
[0048] The beneficial effects of this utility model are as follows:
[0049] In this invention, the ceramic sheet, as a good insulating material, plays an effective insulating role in the thermostat. The ceramic sheet can prevent the electrical components from conducting electricity, thereby avoiding safety hazards such as electrical short circuits or fires that may be caused by the thermostat coming into contact with high-temperature components.
[0050] In this invention, the ceramic plate not only possesses excellent insulation properties but also high thermal conductivity. Placed inside the thermostat and in contact with the bimetallic strip, it facilitates rapid heat conduction, thereby improving the thermostat's response speed and control accuracy. This ensures that the thermostat can quickly adjust and accurately control the circuit's on / off state when temperature changes occur.
[0051] Compared to other thermostats that require complex insulation and thermal isolation designs, this invention achieves both thermal insulation and thermal insulation functions through a simple ceramic plate structure, reducing manufacturing costs and simplifying design and production processes.
[0052] In this invention, the curved surface design of the thermally conductive silicone matches the curved surface of the thermally conductive part of the ceramic sheet, allowing it to better adhere to the contact surface between the heating element and the ceramic sheet, thereby achieving more efficient heat conduction. The addition of thermally conductive silicone improves the thermal contact effect between the ceramic sheet and the heating element, further enhancing the thermal response speed and control accuracy of the temperature controller.
[0053] In this invention, the bimetallic strip of the temperature controller deforms when the heating element reaches a set limit, disconnecting the heating circuit and precisely controlling the operating temperature of the heating element to prevent it from exceeding the safe range. This precise temperature control design ensures stable operation of the heating device and automatically shuts it down when the set temperature is reached, improving the reliability of temperature control. Attached Figure Description
[0054] Figure 1 This is a schematic diagram of a thermostat.
[0055] Figure 2 This is a cross-sectional view of the thermostat.
[0056] Figure 3 This is a cross-sectional view of the thermostat (powered on).
[0057] Figure 4 This is a cross-sectional view of the thermostat (power off state).
[0058] Figure 5This is an exploded view of the thermostat.
[0059] Figure 6 This is an exploded view of the thermostat from another angle.
[0060] Figure 7 This is a schematic diagram of the heating device.
[0061] Figure 8 This is a schematic diagram of the heating device from another angle. Detailed Implementation
[0062] The present invention will be further described below with reference to the accompanying drawings and embodiments:
[0063] Implementation examples, in conjunction with Figures 1 to 8 As shown, a heating device includes a heating tube 1, an NTC thermistor 2, and a control circuit board. One port of the heating tube 1 is a water inlet, and the other port is a water outlet. The heating tube 1 and the NTC thermistor 2 are electrically connected to the control circuit board. The control circuit board controls the starting and stopping of the heating tube 1. When the heating tube 1 is started, it heats the water passing through it. The control circuit board monitors the resistance change of the NTC thermistor 2. When the resistance of the NTC thermistor 2 exceeds a preset value, the control circuit board disconnects the power supply to the heating tube 1.
[0064] Furthermore, it also includes a thermostat 3, which includes a housing 4, a bimetallic strip 5, a push rod 6, a first terminal 7, a conductive spring 8, and a second terminal 9, wherein the conductive spring 8 is placed inside the housing 4;
[0065] The first terminal 7 is placed inside the housing 4. One end of the first terminal 7 is connected to the conductive spring 8, and the other end of the first terminal 7 extends out of the housing 4 to form the first terminal.
[0066] The second terminal 9 is placed inside the housing 4. One end of the second terminal 9 is located above the conductive spring 8 to form a contact end, and the other end of the second terminal 9 extends out of the housing 4 to form a second wiring terminal.
[0067] The bimetallic strip 5 and the push rod 6 are placed inside the housing 4. One end of the push rod 6 abuts against the conductive spring 8, and the other end of the push rod 6 abuts against the bimetallic strip 5. The housing 4 also includes a ceramic sheet 10. The housing 4 is located at the opening corresponding to the bimetallic strip 5. The ceramic sheet 10 is placed inside the housing 4. One end of the ceramic sheet 10 abuts against the bimetallic strip 5, and the other end of the ceramic sheet 10 extends out of the opening to form a heat-conducting part 101.
[0068] The heating tube 1 and the temperature controller 3 are electrically connected to form a heating circuit. The heat-conducting end of the temperature controller 3 is close to / in close contact with the heating tube 1. When the bimetallic strip 5 of the temperature controller 3 reaches the limit temperature, the bimetallic strip 5 deforms and immediately disconnects the heating circuit of the heating tube 1.
[0069] Furthermore, the surface of the heat-conducting part 101 is an arc-shaped surface.
[0070] Furthermore, the heat-conducting part 101 is provided with slots 102 spaced apart.
[0071] Furthermore, it also includes thermally conductive silicone 11, the surface of which is arc-shaped, and the back of which is provided with spaced retaining ribs 111. The retaining ribs are inserted into the slot 102, and the thermally conductive silicone 11 and the ceramic sheet 10 are connected together.
[0072] Furthermore, the ceramic sheet 10 is a superconducting ceramic sheet.
[0073] Furthermore, the heating tube 1 includes a hollow conduit 100 for water to pass through, an insulating layer 200, and a heating wire 300, with the insulating layer 200 disposed around the hollow conduit 100;
[0074] The heating wire 300 is wound around the insulating layer 200, and the heating wire 300 is electrically connected to the temperature controller 3;
[0075] The heating wire 300 generates heat when energized, and the heat heats the hollow conduit 100 through the insulating layer 200. The heat generated by the hollow conduit 100 heats the water passing through the hollow conduit 100.
[0076] Furthermore, the NTC thermistor 2 is disposed at the insulating layer 200.
[0077] In other embodiments, the temperature controller 3 can also be a conventional bimetallic thermostat:
[0078] The heating tube 1 and the bimetallic strip thermostat are electrically connected to form a heating circuit. The heat-conducting end of the bimetallic strip thermostat is close to the heating tube 1. When the bimetallic strip 5 of the bimetallic strip thermostat reaches the limit temperature, the bimetallic strip 5 deforms and immediately disconnects the heating circuit of the heating tube 1.
[0079] Furthermore, the heating tube 1 includes a hollow conduit 100 for water to pass through, an insulating layer 200, and a heating wire 300, with the insulating layer 200 disposed around the hollow conduit 100;
[0080] The heating wire 300 is wound around the insulating layer 200, and the heating wire 300 is electrically connected to the bimetallic thermostat.
[0081] The heating wire 300 generates heat when energized, and the heat heats the hollow conduit 100 through the insulating layer 200. The heat generated by the hollow conduit 100 heats the water passing through the hollow conduit 100.
Claims
1. A temperature controller, comprising a housing, a bimetallic strip, a push rod, a first terminal, a conductive spring, and a second terminal, wherein the conductive spring is disposed within the housing; The first terminal is placed inside the housing, one end of the first terminal is connected to a conductive spring, and the other end of the first terminal extends out of the housing to form a first wiring terminal. The second terminal is placed inside the housing, with one end of the second terminal located above the conductive spring to form a contact end, and the other end of the second terminal extending out of the housing to form a second wiring terminal; The bimetallic strip and the push rod are housed within the housing, with one end of the push rod abutting against the conductive spring and the other end abutting against the bimetallic strip. The characteristic feature is that: It also includes a ceramic plate, with the housing corresponding to the bimetallic strip located at the opening, the ceramic plate placed inside the housing, one end of the ceramic plate abutting against the bimetallic strip, and the other end of the ceramic plate extending out of the opening to form a heat-conducting part.
2. The temperature controller according to claim 1, characterized in that: The surface of the heat-conducting part is an arc-shaped surface.
3. The temperature controller according to claim 2, characterized in that: The heat-conducting part has slots spaced apart.
4. The temperature controller according to claim 3, characterized in that: It also includes thermally conductive silicone, the surface of which is arc-shaped, and the back of which is provided with spaced retaining ribs. The retaining ribs are inserted into the slots, and the thermally conductive silicone and the ceramic sheet are connected together.
5. The temperature controller according to claim 1, characterized in that: The ceramic sheet is a superconducting ceramic sheet.
6. A heating device employing a temperature controller as described in any one of claims 1-5, characterized in that: The device includes a heating element, one end of which is a water inlet and the other end of which is a water outlet. The heating element and a thermostat are electrically connected to form a heating circuit. The heat-conducting part of the thermostat is in close contact with the outer wall of the heating element. When the bimetallic strip of the thermostat reaches the limit temperature, the bimetallic strip deforms, immediately disconnecting the heating circuit of the heating element.