Full-ceramic shell of temperature sensor

Abstract

The utility model discloses a full-ceramic shell of a temperature sensor, which comprises a support, a gasket and a temperature sensing cover body, and the support, the gasket and the temperature sensing cover body are all made of ceramic materials. According to the utility model, the support, the gasket and the temperature sensing cover body which are all made of ceramic materials are adopted, so that the insulating performance of the temperature sensor shell is remarkably improved, the influence of electromagnetic interference on temperature sensor elements is effectively avoided, and the measurement accuracy of the sensor is improved; meanwhile, due to the high temperature resistance of the ceramic material, the temperature sensor can work normally in a high-temperature environment, the application range of the temperature sensor is widened, reliable protection is provided for temperature sensor elements, and it is ensured that the temperature sensor can work accurately and stably. The ceramic material can be aluminum oxide ceramic, silicon nitride ceramic and the like, so that different requirements on high temperature resistance, corrosion resistance and insulation can be met.

Description

TECHNICAL FIELD

[0001] The utility model relates to temperature sensor technical field especially relates to a kind of full ceramic shell of temperature sensor. BACKGROUND

[0002] Temperature sensor is widely used in electric rice cooker, electric pressure cooker and other household appliances, the temperature sensor in these appliances usually adopts thermistor to sense temperature change, and through thermal fuse to prevent electric pot dry burning to form protection, and the exposed pin harness of thermistor and thermal fuse is covered with insulating sleeve to achieve the purpose of insulation.

[0003] Traditional temperature sensor shell material usually contains metal or plastic. Among them, the shell of metal material is susceptible to electromagnetic interference, resulting in the decline of sensor measurement accuracy, and the insulation performance of metal shell is poor, when insulating sleeve is installed on thermistor and thermal fuse and fixed in metal shell with metal fixing bracket, insulating sleeve is easily pressed through, causing poor voltage resistance and electric leakage. Although the shell of plastic material has certain insulation, it has obvious shortcomings in high temperature resistance, chemical corrosion resistance and mechanical strength, etc., and it is difficult to meet the use requirements of temperature sensor under complex working conditions.

[0004] Therefore, it has important practical significance to develop a shell with stable structure and excellent insulation performance. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of full ceramic shell of temperature sensor to solve the problems raised in the above background technology. To achieve the above-mentioned purpose, the utility model provides the following technical solutions:

[0006] A kind of full ceramic shell of temperature sensor, including support, gasket and temperature sensing cover body, the support, the gasket and the temperature sensing cover body are all ceramic material.

[0007] Further, the ceramic material is selected as alumina ceramic or silicon nitride ceramic.

[0008] Further, the support is used to install temperature sensor element, the gasket is laid on the support, and the temperature sensing cover body is covered on the support and the gasket.

[0009] Further, the temperature sensing cover body is connected and fastened with the support.

[0010] Further, the outer edge of the support is provided with flange, the inner side of the temperature sensing cover body is provided with recess, and the flange is matched with the recess.

[0011] Further, the outer edge of the bracket is provided with external threads, and the inner side of the temperature sensing cover body is provided with internal threads matched with the external threads, and the bracket and the temperature sensing cover body are fastened through the internal and external threads.

[0012] Further, the bracket is provided with a tenon, and the temperature sensing cover body is provided with a mortise matched with the tenon, and the tenon and the mortise are inserted and engaged.

[0013] The beneficial effects of the present application are as follows: the bracket, the gasket and the temperature sensing cover body made of full ceramic material significantly improve the insulation performance of the temperature sensor shell, effectively avoid the influence of electromagnetic interference on the temperature sensor element, and improve the accuracy of sensor measurement; at the same time, the high temperature resistance of the ceramic material can make the temperature sensor work normally in a high temperature environment, widen the application range of the temperature sensor, provide reliable protection for the temperature sensor element, and ensure that the temperature sensor can work accurately and stably. The ceramic material can be selected from alumina ceramic, silicon nitride ceramic and the like to meet different high temperature resistance, corrosion resistance and insulation requirements. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows: obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the premise of not affecting the understanding of the readers.

[0015] Figure 1 It is the structural schematic diagram of the present application in embodiment one.

[0016] Figure 2 It is the connection structure schematic diagram of the temperature sensing cover body and the bracket in the present application in embodiment one.

[0017] Figure 3 It is the structural schematic diagram of the present application in embodiment two.

[0018] It should be noted that the drawings are not necessarily drawn to scale, but are only shown in a schematic manner without affecting the understanding of the readers. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings of the embodiments of the present application: obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0020] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "transverse", "longitudinal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0021] In addition, in addition to indicating the orientation or positional relationship, the above-mentioned terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the present application can be understood according to the specific circumstances.

[0022] In addition, the terms "mounting", "setting", "providing", "connecting", "connecting" should be broadly understood. For example, it can be fixedly connected, detachably connected, or integrally constructed; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0023] In addition, the terms "first", "second" and the like are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not intended to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise stated, the meaning of "multiple" is two or more.

[0024] It should also be understood that the terms used in the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the present application and the appended claims, unless the context clearly indicates otherwise, the singular form "a", "an" and "the" is intended to include the plural form.

[0025] It should be further understood that the term "and / or" used in the present application and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations. Embodiments

[0026] As Figure 1As shown, a full ceramic shell of a temperature sensor includes a bracket 1, a gasket 2 and a temperature sensing cover 3, all of which are made of ceramic material. Since ceramic material has good insulation, high temperature resistance, chemical stability and mechanical strength, by adopting the bracket 1, the gasket 2 and the temperature sensing cover 3 made of full ceramic material, the insulation performance of the temperature sensor shell is significantly improved, the influence of electromagnetic interference on the temperature sensor element is effectively avoided, and the accuracy of sensor measurement is improved. At the same time, the high temperature resistance of the ceramic material can make the temperature sensor work normally in a high temperature environment, widen the application range of the temperature sensor, provide reliable protection for the temperature sensor element, and ensure that the temperature sensor can work accurately and stably. The selection of ceramic material can be alumina ceramic, silicon nitride ceramic, etc. to meet different high temperature resistance, corrosion resistance and insulation requirements.

[0027] The specific structure design of the full ceramic shell of the present application is as follows:

[0028] The bracket 1 is made of high-precision ceramic material through precise ceramic forming process, such as common injection molding and dry pressing molding, etc. The bracket 1 is used to install temperature sensor elements (including thermistors and thermal fuses), and in the manufacturing process, the shape and size of the bracket 1 can be accurately designed according to the specifications of the temperature sensor elements. By designing a groove 31 on the bracket 1 that matches the sensor elements, the sensor elements can be tightly embedded therein, and the sensor elements can be accurately and stably installed on the bracket 1 through glue pouring and other methods.

[0029] The gasket 2 is made of the same or compatible ceramic material as the bracket 1 and is made through a sheet cutting process. The shape of the gasket 2 matches the shape of the upper surface of the bracket 1 and can completely cover the area of the bracket 1 where the temperature sensor elements are placed. The gasket 2 is laid on the bracket 1, which has the effect of buffering and reducing the influence of external vibration, impact and other factors on the sensor elements. On the other hand, the gasket 2 can fill the gap between the bracket 1 and the temperature sensing cover 3, enhance the sealing between the temperature sensing cover 3 and the bracket 1, improve the temperature transfer efficiency, and prevent foreign matter from entering and affecting the performance of the sensor. When laying the gasket 2, it is necessary to ensure that it is flat and tightly attached to the surface of the bracket 1, so as to play a good buffering and sealing role. The specific thickness of the gasket 2 is determined according to the requirements of the actual application scene, and the thickness of the gasket 2 can be appropriately increased to improve the buffering effect.

[0030] The temperature-sensing cover 3 is also made of ceramic material, and its manufacturing process is similar to that of the bracket 1. Its shape is designed to completely cover the bracket 1 and the gasket 2. By placing the temperature-sensing cover 3 over the bracket 1 and the gasket 2, it protects the internal components and senses the external temperature, transmitting it to the sensor element. The surface of the temperature-sensing cover 3 can be polished or frosted according to the actual application requirements; polishing improves its surface smoothness and reduces heat accumulation; frosting increases surface friction, facilitating operation.

[0031] Meanwhile, the temperature-sensing cover 3 and the bracket 1 are connected and secured to enhance the overall stability of the housing, effectively resist external forces such as vibration and impact, protect the internal temperature sensor components from damage, and improve the reliability and service life of the sensor.

[0032] In the specific implementation of this application embodiment, the temperature-sensing cover 3 and the bracket 1 are connected and secured by the engaging structure of the flange 11 and the groove 31. For example... Figure 2 As shown, the outer edge of the bracket 1 is provided with a flexible flange 11. The flange 11 is made of the same ceramic material as the bracket 1 and is formed using a special mold process to give it a certain degree of elasticity. The inner side of the temperature-sensing cover 3 is provided with a groove 31, and the flange 11 engages with the groove 31. This engaging structure ensures a stable and reliable connection between the temperature-sensing cover 3 and the bracket 1. Compared with traditional connection methods, such as adhesive bonding, the engaging structure is less prone to connection failure due to environmental factors during long-term use, greatly improving the overall stability of the housing. Furthermore, the engaging structure design also offers the advantages of convenient installation and disassembly, facilitating the maintenance and repair of the temperature sensor. Example

[0033] The difference between this embodiment and Embodiment 1 is that the temperature-sensing cover 3 and the bracket 1 are connected and secured by an internal and external threaded connection structure. For example... Figure 3 As shown, the bracket 1 has an external thread 12 on its outer edge, and the temperature-sensing cover 3 has an internal thread 32 that mates with the external thread 12 on its inner side. When the temperature-sensing cover 3 is placed on the bracket 1, the internal thread 32 of the temperature-sensing cover 3 is aligned with the external thread 12 of the bracket 1 and rotated. The engagement of the internal and external threads 12 secures the connection between the bracket 1 and the temperature-sensing cover 3. The threaded connection structure has high connection strength and can provide a certain degree of sealing. To further improve the sealing performance, an appropriate amount of ceramic sealing tape or ceramic sealant can be wrapped around the threaded connection, which can effectively prevent external corrosive substances from entering the housing and protect the temperature sensor element. Example

[0034] The difference between the embodiment and the embodiment one is that the temperature sensing cover 3 is connected and fixed with the support 1 through a mortise and tenon structure, wherein the support 1 is provided with a tenon, and the shape of the tenon can be designed as a rectangle, a trapezoid or a semicircle, etc., and the specific shape is determined according to actual requirements. The corresponding position of the temperature sensing cover 3 is provided with a mortise matching the tenon, and the depth of the mortise is slightly greater than the length of the tenon, so as to ensure that the tenon can be completely inserted into the mortise, realize close cooperation, and connect and fix the support 1 and the temperature sensing cover 3 through the tenon and the mortise. In order to further enhance the stability of the connection, a proper amount of ceramic special glue can be applied on the contact surface of the tenon and the mortise, and after the glue is solidified, not only the small gap between the mortise and the tenon can be filled, but also the strength of the connection can be increased, so that the stability of the connection of the temperature sensing cover 3 and the support 1 can be effectively ensured, and the normal work of the sensor can be ensured.

[0035] For the embodiments of the utility model, it also needs to be explained that the embodiments and the features in the embodiments of the utility model can be combined with each other to obtain new embodiments without conflict.

[0036] The above is only the preferred embodiment of the utility model, and does not limit the utility model in any form, and the protection scope of the utility model should be subject to the protection scope of the claims. Although the utility model has been disclosed as above through the preferred embodiment, however, it is not used to limit the utility model, and any skilled person in the art can make some changes or modifications of equivalent embodiments with the disclosed technical content without departing from the technical scheme range of the utility model, and any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the utility model still belong to the range of the technical scheme of the utility model.

Claims

1. A full ceramic housing for a temperature sensor, comprising a bracket (1), a gasket (2), and a temperature-sensing cover (3), characterized in that, The bracket (1), the gasket (2) and the temperature-sensing cover (3) are all made of ceramic. The bracket (1) is used to install the temperature sensor element, the gasket (2) is laid on the temperature sensor element in the bracket (1), and the temperature-sensing cover (3) is placed on the bracket (1) and the gasket (2).

2. The all-ceramic housing of the temperature sensor according to claim 1, characterized in that, The ceramic material is selected as either alumina ceramic or silicon nitride ceramic.

3. The all-ceramic housing of the temperature sensor according to claim 1, characterized in that, The temperature-sensing cover (3) is connected and secured to the bracket (1).

4. The all-ceramic housing of the temperature sensor according to claim 3, characterized in that, The bracket (1) has a flange (11) on its outer edge and a groove (31) on its inner side. The flange (11) and the groove (31) are engaged.

5. The all-ceramic housing of the temperature sensor according to claim 3, characterized in that, The bracket (1) has an external thread (12) on its outer edge, and the temperature-sensing cover (3) has an internal thread (32) that matches the external thread on its inner side. The bracket (1) and the temperature-sensing cover (3) are connected and fastened by the internal and external threads.

6. The all-ceramic housing of the temperature sensor according to claim 3, characterized in that, The bracket (1) is provided with a tenon, and the temperature sensing cover (3) is provided with a mortise that matches the tenon. The tenon and the mortise are inserted and engaged.

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