High-sensitivity small-on-off temperature controller
Through the improvement of the thermostat structure, especially the optimized design of the temperature-sensitive cover, guide frame and disc, the problems of slow temperature sensing speed and insensitive response of traditional thermostats are solved, and higher temperature control accuracy and response speed are achieved.
Patent Information
- Application Number
- CN202420730830.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-10
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-04-10
AI Technical Summary
Traditional thermostats have problems such as slow temperature sensing speed and insensitive response, and cannot meet application scenarios with high response requirements for temperature changes.
A high-sensitive small open-stop thermostat was designed. By improving the structural design of the thermostat, especially the optimized design of the temperature-sensitive cover, guide frame and disc, the temperature-sensitive surface area is increased and the heat transfer between the temperature-sensitive cover and the heating body is improved.
It significantly improves the temperature sensing speed and response sensitivity of the thermostat, improves the accuracy and response speed of temperature control, and is suitable for application scenarios with high requirements for temperature changes.
Smart Images
Figure CN222690593U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of temperature devices, and in particular to a high-sensitivity small on-off temperature controller, which is particularly suitable for application scenarios with high requirements for temperature change response. Background Art
[0002] A thermostat is a series of automatic control components that produce certain special effects and conduction or disconnection actions by physically deforming the switch according to the temperature changes in the working environment. It is also called a temperature control switch, temperature protector or temperature controller. The application range of thermostats is very wide. Different types of thermostats are used in many products such as home appliances, motors, refrigeration or heating.
[0003] The working principle of the thermostat is based on the sampling and real-time monitoring of the temperature sensor. When the ambient temperature is higher or lower than the set control value, the control circuit will start the corresponding action. Specifically, when the ambient temperature rises and exceeds the set value, the thrust generated by the expansion of the temperature sensing element will close the heat medium to reduce the output temperature; on the contrary, when the ambient temperature drops and is lower than the set value, the temperature sensing element contracts and the heat medium is opened under the action of the reset device to increase the output temperature. In this way, the thermostat can maintain the controlled temperature within the set temperature range.
[0004] With the development of modern technology, the performance requirements of thermostats are getting higher and higher, especially the response speed and accuracy to temperature changes. Traditional thermostats have problems such as slow temperature sensing speed and insensitive response, which cannot meet the needs of certain specific occasions. For example, they are dragging and uncomfortable in some plug-and-play appliances or appliances that must meet the use conditions as soon as they are used. Therefore, it is necessary to design a highly sensitive small on-off thermostat to improve the accuracy and response speed of temperature control. Summary of the invention
[0005] The purpose of the present invention is to provide a high-sensitivity small on-off thermostat, which improves the temperature sensing speed and response sensitivity by improving the structural design of the thermostat to meet the needs of high-precision temperature control.
[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows:
[0007] A high-sensitivity small on-off temperature controller, comprising: a shell, a guide frame, a temperature-sensitive cover, a disc, an action rod, a moving contact and a fixed contact; the interior of the shell forms a accommodating space that opens upward, the guide frame, the disc, the action rod, the moving contact and the fixed contact are all installed in the accommodating space, a first wiring terminal and a second wiring terminal are arranged on the outside of the shell, the shell, the guide frame and the action rod are all insulating parts, the moving contact, the fixed contact, the first wiring terminal and the second wiring terminal are all conductive parts, the first wiring terminal and the second wiring terminal are electrically connected to the fixed contact and the moving contact respectively; a guide hole and a disc slot are provided on the guide frame, the action rod is slidably installed in the guide hole, the disc is placed in the disc slot, and the disc and the moving contact are respectively arranged at two ends of the action rod; the disc is heated to a customized temperature, deforms and flips, and resets after the temperature drops, driving the fixed contact to separate or contact the moving contact;
[0008] The temperature controller also includes a temperature-sensitive cover, which is buckled on the top of the disc, and a deformation space for the disc is formed between the temperature-sensitive cover and the disc groove.
[0009] Furthermore, the temperature-sensitive cover includes a cover body, a long bracket and a packaging part, the packaging part is arranged between the cover body and the long bracket, the cover body is arranged above the disc, and the packaging part is surrounded by the outer side of the shell.
[0010] Furthermore, the depth of the disc groove is smaller than the height of the disc, and when the temperature controller is placed upright, the distance between the disc and the temperature-sensing cover is less than 0.1 mm.
[0011] Furthermore, a receiving groove which is concave upwards is provided on a side of the cover body facing the disc.
[0012] Furthermore, the disc includes an active layer and a passive layer, the active layer is made of P675R heat-resistant steel, and the passive layer is made of iron sheet.
[0013] Furthermore, the thickness of the temperature-sensitive cover is 0.4-0.5 mm.
[0014] Furthermore, the fixed contact is connected to the first terminal via a first conductive member, the first conductive member and the fixed contact are both mounted on a fixed contact bracket, and the fixed contact bracket is fixedly arranged in the accommodating space.
[0015] Furthermore, the moving contact is connected to the second terminal through a second conductive member, the second conductive member and the moving contact are both mounted on a moving contact bracket, the moving contact bracket includes a movably arranged first mounting frame and a fixedly arranged second mounting frame, the moving contact is mounted on the first mounting frame, the second conductive member is arranged on the second mounting frame, and the first mounting frame is an elastic member; when the disc is in a non-heated state, the moving contact contacts the fixed contact under the elastic force of the first mounting frame; after the disc is deformed due to heat, the action rod separates the moving contact from the fixed contact by applying force to the first mounting frame.
[0016] Furthermore, a pressing block is arranged between the second conductive member and the second mounting frame, and the pressing block is used to increase the contact area between the second conductive member and the second mounting frame.
[0017] Furthermore, the fixed contact and the moving contact are made of AgNi 10 and Cu composite materials.
[0018] The beneficial effects of the present application are as follows: the high-sensitivity small on-off thermostat of the present invention improves the structural design of the thermostat, especially the optimized design of the temperature-sensing cover, guide frame and disc, so that the temperature-sensing surface area is more than 30% larger than that of the conventional planar structure cover, and the heat transfer between the temperature-sensing cover and the heating element is improved, thereby significantly improving the temperature sensing speed and response sensitivity of the thermostat. Compared with the traditional thermostat, the present invention has higher temperature control accuracy and response speed, and is suitable for application scenarios with high requirements for temperature change response. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 According to some embodiments of the present application, a cross-sectional view of the high-sensitivity small on-off thermostat is shown;
[0020] Figure 2 According to some embodiments of the present application, an exploded diagram of the high-sensitivity small on-off thermostat is shown;
[0021] Figure 3 According to some embodiments of the present application, a cross-sectional view of the high-sensitivity small on-off thermostat in another direction is shown;
[0022] Figure 4 According to some embodiments of the present application, a schematic structural diagram of a housing is shown;
[0023] Figure 5 According to some embodiments of the present application, a schematic structural diagram of a moving contact support is shown;
[0024] Figure 6 According to some embodiments of the present application, a schematic structural diagram of a guide frame is shown;
[0025] Figure 7 According to some embodiments of the present application, a schematic diagram of the structure of a disc is shown;
[0026] Figure 8 According to some embodiments of the present application, a schematic diagram of the structure of a temperature-sensitive cover is shown;
[0027] Fig. 9 According to some embodiments of the present application, it is shown Figure 8 A partial enlarged view of part A;
[0028] Fig.10 According to some embodiments of the present application, a structural schematic diagram of the high-sensitivity small on-off thermostat in the disconnected state is shown. DETAILED DESCRIPTION
[0029] The following is a more detailed description of the technical features and advantages of the present application in conjunction with the accompanying drawings, so that the advantages and features of the present application can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.
[0030] It should be noted that, in the description of the present application, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.
[0031] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the importance of the technical features shown.
[0032] In addition, it should be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0033] See also Figure 1-9, is a structural schematic diagram of a high-sensitivity small on-off thermostat of the present embodiment, comprising: a shell 1, a moving contact bracket 2, a moving contact 3, a fixed contact 4, a temperature-sensing cover 5, a guide frame 6, a disc 7, an actuating rod 8, a fixed contact bracket 9, a first conductive member 10, a first terminal 11, a second conductive member 12, a pressing block 13 and a second terminal 14; wherein, the shell 1, the guide frame 6 and the actuating rod 8 are insulating members, which can be made of ceramic materials; the moving contact bracket 2, the moving contact 3, the fixed contact 4, the fixed contact bracket 9, the first conductive member 10, the first terminal 11, the second conductive member 12, the pressing block 13 and the second terminal 14 are all conductive members, which can be made of metal materials.
[0034] The shell 1 is an insulating support for the temperature controller. An upwardly open accommodation space 101 is formed inside the shell 1. The moving contact bracket 2, the moving contact 3, the fixed contact 4, the guide frame 6, the disc 7, the actuating rod 8 and the fixed contact bracket 9 are all installed in the accommodation space 101. The shell 1 can be made of 95 porcelain.
[0035] The moving contact bracket 2 is used to install the moving contact 3 and the second conductive member 12, and realize the electrical connection between the moving contact 3 and the second conductive member 12. The housing 1 is provided with a second through hole 102 connecting the accommodating space 101 and the external space. The second conductive member 12 extends out of the housing 1 through the second through hole 102 to connect the second terminal 14. Specifically, the moving contact bracket 2 includes a first mounting frame 201 and a second mounting frame 202. The first mounting frame 201 is provided with a moving contact mounting hole 203. The moving contact 3 is mounted on the first mounting frame 201 through the moving contact mounting hole 203. The first mounting frame 201 is also provided with a trigger point 205. The trigger point 205 is used to contact the action rod 8. The second conductive member 12 is arranged on the second mounting frame 202. The second conductive member mounting hole 204 is provided on the second mounting frame 202. The second conductive member 12 passes through the first mounting frame 201 in sequence. The second conductive member mounting hole 204 and the second through hole 102 extend out of the housing 1. The second mounting frame 202 is fixedly arranged in the housing 1. One end of the first mounting frame 201 is connected to the second mounting frame 202 and is a fixed end. The other end is a free end. The free end of the first mounting frame 201 can achieve elastic deformation relative to its fixed end. The moving contact 3 is arranged on the free end of the first mounting frame 201. Under the elastic force of the first mounting frame 201, the moving contact 3 is tightly abutted against the fixed contact 4, and the temperature control switch is closed. Specifically, in order to make the first mounting frame 201 elastic, the moving contact bracket 2 should be a thin sheet member, and the second mounting frame 202 is a flat member, which abuts against the lower end surface of the housing 1 to be fixed. The first mounting frame 201 is arranged above the second mounting frame 202.
[0036] The moving contact 3 and the fixed contact 4 are electrical components used to realize the closing / opening of the thermostat switch, and can be made of AgNi 10与Cu composite materials to enhance the conductivity.
[0037] The fixed contact bracket 9 is used to install the fixed contact 4 and the first conductive member 10, and realize the electrical connection between the fixed contact 4 and the first conductive member 10. The housing 1 is provided with a first through hole 101 connecting the accommodating space 101 with the external space. The first conductive member 10 extends out of the housing 1 through the first through hole 101 to connect the first terminal 11. The fixed contact bracket 9 is fixedly arranged in the first accommodating space 101. Specifically, a boss 103 for installing the fixed contact bracket 9 is provided in the housing 1. The first through hole 101 is opened in the boss 103. The height of the boss 103 is higher than the lower end surface of the housing 1, so that the fixed contact 4 is arranged above the moving contact 3.
[0038] The guide frame 6 is fixedly mounted on the upper end of the housing 1 and is used to mount the disc 7 and the actuating rod 8. Specifically, a penetrating guide hole 601 is set at the center of the guide frame 6, and the actuating rod 8 is movably mounted in the guide hole 601 and can reciprocate up and down along the guide hole 601. A disc groove 602 is set above the guide hole 601, and the disc 7 is arranged in the disc groove 602; the disc 7 and the first mounting frame 201 of the moving contact bracket 2 are respectively arranged at both ends of the actuating rod 8. When the disc 7 is not heated, it is an upwardly convex arc surface or plane, and the moving contact 3 contacts the fixed contact under the elastic force of the first mounting frame 201. 4, so that the temperature controller forms a closed state; when the disc 7 is heated to the customized temperature, it quickly moves downward and turns into a concave arc surface, and the bottom of the disc 7 pushes the action rod 8 to slide downward along the guide hole 601, and the lower end of the action rod 8 pushes the second mounting frame 201 downward by abutting against the contact point 205, so that the moving contact 3 is separated from the fixed contact 4, and the temperature control switch is disconnected; after the temperature drops, the disc 7 will quickly reset and become a convex surface or plane that bulges upward again. The moving contact 3 re-contacts with the fixed contact 4 under the elastic force of the first mounting frame 201, and the above process is repeated to achieve temperature control. Preferably, the disc slot 602 is shallowly designed, that is, the groove depth d of the disc slot 602 is smaller than the height of the disc 7. Through the shallow design, the disc 7 is closer to the temperature sensing cover 5, thereby improving the temperature sensitivity.
[0039] The temperature-sensing cover 5 is arranged above the temperature-sensing disc 7 and is buckled on the upper end of the shell 1. On the one hand, it is used to form contact with the disc 7 to play a role in heat conduction; on the other hand, it is used to achieve the encapsulation of the first accommodating space 101. In this embodiment, the temperature-sensing cover 5 is optimized and designed. Specifically, the temperature-sensing cover 5 includes a cover body 501, a long bracket 502, and a packaging portion 503 arranged between the cover body 501 and the long bracket 502. The cover body 501 is arranged above the disc 7. The cover body 501 cooperates with the disc groove 602 to form a deformation space for the disc 7. The long bracket 502 can be used to install the thermostat on the heating element. Specifically, screw holes can be set on the long bracket 502 to screw the thermostat on the heating element. The packaging portion 503 is used to cooperate with the shell 1 to achieve the encapsulation of the shell 1. The temperature sensing surface area of the temperature sensing cover 5 of this embodiment is more than 30% larger than that of the conventional flat cover, thereby improving the heat transfer between the temperature sensing cover 5 and the heating element, and significantly improving the temperature sensing speed and response sensitivity of the temperature controller. Furthermore, when the thermostat is upright (that is, arranged with the temperature sensing surface facing upward), the distance between the disc 7 and the temperature sensing cover 5 is less than 0.1 mm, ensuring that the thermostat can be installed in any direction, and the disc 7 can transfer heat between the temperature sensing cover 5 stably and quickly. Preferably, an upwardly concave receiving groove 504 is provided on the side of the cover body 501 facing the disc 7, and the receiving groove 504 is used to increase the deformation space of the disc 7 so that the disc 7 can be lifted upward and will not be stuck on the temperature sensing cover 5.
[0040] The temperature sensing cover 5 should be a thin sheet with a thickness of ≤1.0 mm. In order to achieve the connection between the temperature sensing cover 5 and the housing 1, a flange structure 104 can be provided at the upper end of the housing 1, and a groove that cooperates with the flange structure 104 is formed inside the packaging part 503, and the installation of the temperature sensing cover 5 is achieved through the cooperation between the groove and the flange structure 104. In this embodiment, the temperature sensing cover 5 can be made of LF2-M aluminum-magnesium alloy material.
[0041] The disc 7 includes an active layer 701 and a passive layer 702. The difference in expansion coefficients of the two materials causes the disc 7 to flip and deform after being heated. The disc 7 is made of a material with a low elastic modulus and a high specific curvature. This material has the characteristics of rapid response to temperature changes and can improve the sensitivity and accuracy of the thermostat. At the same time, the physical property consistency of the disc 7 material is strictly controlled to ensure that the thermostat can maintain stable performance during long-term use. Specifically, in this embodiment, the active layer 701 is made of P675R heat-resistant steel, and the passive layer 702 is made of iron sheet.
[0042] A pressing block 13 may be further provided between the second conductive member 12 and the second mounting frame 201 to increase the force bearing area and prevent the repeated deformation of the first mounting frame 201 from causing poor contact between the second conductive member 12 and the second mounting frame 202 and affecting the output of the temperature control signal.
[0043] See also Figure 3 , is a schematic diagram of the high-sensitivity small on-off thermostat of this embodiment in a closed state; Fig.10 Schematic diagram of the structure of the thermostat in the disconnected state.
[0044] When the temperature controller of the present application is in operation, when the ambient temperature changes, the cover and the temperature-sensing disc quickly sense the temperature change, and through the interaction between the guide frame and the temperature-sensing disc, rapid and accurate temperature control is achieved.
[0045] In the description of this specification, the description with reference to the terms "some embodiments", "some examples", "exemplarily", "example", "preferably", or "further" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.
[0046] The above descriptions are merely embodiments of the present application and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.
Claims
1. A high-sensitivity small on-off thermostat, characterized in that: include: A shell, a guide frame, a temperature-sensitive cover, a disc, an action rod, a moving contact and a fixed contact; the interior of the shell forms a accommodating space which is open upwards, the guide frame, the disc, the action rod, the moving contact and the fixed contact are all installed in the accommodating space, a first wiring terminal and a second wiring terminal are arranged on the outside of the shell, the shell, the guide frame and the action rod are all insulating parts, the moving contact, the fixed contact, the first wiring terminal and the second wiring terminal are all conductive parts, the first wiring terminal and the second wiring terminal are electrically connected to the fixed contact and the moving contact respectively; a guide hole and a disc slot are provided on the guide frame, the action rod is slidably installed in the guide hole, the disc is placed in the disc slot, the disc and the moving contact are respectively arranged at two ends of the action rod; the disc is heated to a customized temperature, deforms and flips, and resets after the temperature drops, driving the fixed contact to separate or contact the moving contact; The temperature controller also includes a temperature-sensitive cover, which is buckled on the top of the disc, and a deformation space for the disc is formed between the temperature-sensitive cover and the disc groove.
2. The high-sensitivity small on-off thermostat according to claim 1, characterized in that: The temperature-sensitive cover comprises a cover body, a long bracket and a packaging part, wherein the packaging part is arranged between the cover body and the long bracket, the cover body is arranged above the disc, and the packaging part is surrounded on the outer side of the shell.
3. The high-sensitivity small on-off thermostat according to claim 1, characterized in that: The depth of the disc groove is less than the height of the disc, and when the temperature controller is upright, the distance between the disc and the temperature sensing cover is less than 0.1 mm.
4. The high-sensitivity small on-off thermostat according to claim 2, characterized in that: A side of the cover body facing the disc is provided with an upwardly concave accommodating groove.
5. The high-sensitivity small on-off thermostat according to claim 1, characterized in that: The disc comprises an active layer and a passive layer, wherein the active layer is made of P675R heat-resistant steel, and the passive layer is made of an iron sheet.
6. The high-sensitivity small on-off thermostat according to claim 2, characterized in that: The thickness of the temperature-sensitive cover is 0.4-0.5 mm.
7. The high-sensitivity small on-off thermostat according to claim 1, characterized in that: The fixed contact is connected to the first terminal via a first conductive member. The first conductive member and the fixed contact are both mounted on a fixed contact bracket. The fixed contact bracket is fixedly arranged in the accommodating space.
8. The high-sensitivity small on-off thermostat according to claim 1, characterized in that: The moving contact is connected to the second terminal through a second conductive member, the second conductive member and the moving contact are both mounted on a moving contact bracket, the moving contact bracket includes a first movably arranged mounting frame and a second fixedly arranged mounting frame, the moving contact is mounted on the first mounting frame, the second conductive member is arranged on the second mounting frame, and the first mounting frame is an elastic member; when the disc is in a non-heated state, the moving contact contacts the fixed contact under the elastic force of the first mounting frame; after the disc is deformed due to heat, the action rod separates the moving contact from the fixed contact by applying force to the first mounting frame.
9. The high-sensitivity small on-off thermostat according to claim 8, characterized in that: A pressing block is arranged between the second conductive member and the second mounting frame, and the pressing block is used to increase the contact area between the second conductive member and the second mounting frame.
10. The high-sensitivity small on-off thermostat according to claim 1, characterized in that: The fixed contact and the moving contact are made of AgNi 10 and Cu composite materials.