High-sensitivity waterproof temperature controller

Abstract

The utility model relates to waterproof temperature controller technical field, especially high sensitivity waterproof temperature controller, include: temperature controller body, have the shell structure, and the same end of shell structure leads out respectively forms first pin and second pin, outer shell body, open along the length direction, and form the protection cavity to extend to the inside, temperature controller body sets up in the protection cavity, and first pin and second pin set up towards the opening end side of outer shell body, sealing layer, have two layers along the length direction of temperature controller body, wrap in first pin and second pin outside, and the sealing element of outer layer away from temperature controller body blocks the opening end of outer shell body. The utility model through the cooperation of outer shell body and internal two layers of sealing layer, has constructed from the outside to the inside multiple protective barriers, has strengthened the sealing reliability and long -term stability of temperature controller under the bad environment such as damp, splashing water, has effectively improved the overall waterproof function.

Description

Technical Field

[0001] This utility model relates to the technical field of waterproof thermostats, and in particular to a highly sensitive waterproof thermostat. Background Technology

[0002] A thermostat, also known as a temperature controller, is a switching device that drives internal contacts to open or close based on changes in the temperature of the working environment through the physical deformation or electrical parameter changes of an internal temperature-sensing element. Its core function is to automatically monitor and regulate the temperature of the controlled object. When the monitored temperature reaches a preset threshold, it automatically cuts off or connects the circuit. Therefore, it needs to be able to effectively prevent liquid water from entering the interior, so as to ensure stable and safe operation in harsh environments with humidity or direct contact with water.

[0003] In existing technologies, a common practice to achieve waterproof sealing of thermostats is to pot or wrap the lead-out ends of the thermostat body with sealing material. However, this single-layer sealing structure is prone to developing micro-cracks or peeling at the interface between the thermostat body and the lead-out ends when facing complex operating environments such as frequent temperature cycles, mechanical vibration, or installation stress, thus forming water seepage channels. Moreover, the structure that exposes the sealing material to the outermost layer has limited mechanical strength and is easily damaged by physical scratches during installation or use, further reducing the waterproof performance.

[0004] Therefore, a thermostat structure that can achieve more reliable waterproof protection is needed.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the general background of this disclosure and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] This invention provides a highly sensitive waterproof thermostat, which adopts a structure combining an outer protective shell and an internal double-layer sealing layer to achieve a higher level of waterproof reliability and significantly improve installation convenience and structural stability.

[0007] This utility model provides a highly sensitive waterproof temperature controller, comprising: The thermostat body has a housing structure, and the same end of the housing structure leads out to form a first pin and a second pin respectively; The outer housing has an opening along its length and extends inward to form a protective cavity. The thermostat body is disposed in the protective cavity, and the first pin and the second pin are positioned facing the opening end of the outer housing. A sealing layer is provided in two layers along the length of the thermostat body, which wrap around the outside of the first pin and the second pin, and the sealing element of the outer layer away from the thermostat body blocks the opening end of the outer protective shell.

[0008] Furthermore, at least one mounting ear is provided on the outer side of the outer housing, and each mounting ear is provided with a through mounting hole.

[0009] Furthermore, the plurality of the mounting ears are symmetrically arranged on both sides of the outer housing along the length direction; Alternatively, multiple mounting ears may be respectively disposed on the end face and side face of the outer housing.

[0010] Furthermore, the cross-section of the outer protective shell facing the opening direction is quadrilateral or circular.

[0011] Furthermore, the two sealing layers are a silicone layer and an epoxy resin layer, respectively.

[0012] Furthermore, both the first pin and the second pin are connected to external leads, and the sealing layer located on the outer layer covers the connection point between the first pin, the second pin and the external leads.

[0013] Furthermore, both the first pin and the second pin include a support portion and a covering portion. The cross-section of the support portion is arc-shaped, and the covering portion is trapezoidal, symmetrically arranged on both sides of the support portion. The two covering portions are bent toward the symmetrical central axis of the support portion to form a U-shaped groove for placing the end of the outer lead wire.

[0014] Furthermore, the housing structure includes a first portion and a second portion, with the first pin and the second pin respectively disposed at the same end of the first portion and the second portion.

[0015] Furthermore, one side of the first portion is recessed to form a receiving cavity, and the second portion is located on the opening side of the receiving cavity, with both sides bent and engaged at the edge of the first portion.

[0016] Furthermore, an insulating plate is provided between the first portion and the second portion, and a clearance hole is provided in the middle of the insulating plate, the clearance hole corresponding to the receiving cavity.

[0017] The following technical effects can be achieved through the technical solution of this utility model: Through the coordinated operation of the outer casing and the two internal sealing layers, a multi-layered protective barrier is constructed from the outside in, enhancing the sealing reliability and long-term stability of the thermostat in harsh environments such as humidity, splashing water, and even short-term immersion. The thermostat body is integrated into the outer casing, forming a compact and fully functional independent module. By directly providing mounting ears on the outer casing, the thermostat can be installed without the need for additional mounting brackets or complex fasteners, simplifying the installation process and improving assembly efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the appearance of the high-sensitivity waterproof temperature controller in the embodiment of this utility model; Figure 2 This is a schematic diagram of the structure of the temperature controller body and sealing layer in an embodiment of this utility model; Figure 3 This is a side view of the highly sensitive waterproof temperature controller in an embodiment of this utility model; Figure 4 This is a schematic diagram of the structure of the temperature controller body in an embodiment of this utility model; Figure 5 This is a structural schematic diagram of the temperature controller body from another perspective in an embodiment of this utility model; Figure 6 This is an exploded view of the temperature controller body in an embodiment of this utility model.

[0020] Reference numerals in the attached drawings: 1. Temperature controller body; 11. Housing structure; 111. First section; 1111. Receiving cavity; 112. Second section; 113. Insulating plate; 1131. Relief hole; 12. First pin; 13. Second pin; 14. Support part; 15. Covering part; 16. U-shaped groove; 2. Outer protective housing; 21. Protective cavity; 22. Mounting ear; 23. Mounting hole; 3. Sealing layer; 4. External lead wire. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] This utility model provides a method such as Figures 1 to 6 The high-sensitivity waterproof temperature controller shown includes: The thermostat body 1 has a housing structure 11, and the same end of the housing structure 11 leads out to form a first pin 12 and a second pin 13 respectively; The outer housing 2 has an opening along its length and extends inward to form a protective cavity 21. The thermostat body 1 is disposed in the protective cavity 21, and the first pin 12 and the second pin 13 are disposed facing the opening end of the outer housing 2. The sealing layer 3 has two layers along the length of the thermostat body 1, which wrap around the outside of the first pin 12 and the second pin 13, and the sealing element of the outer layer away from the thermostat body 1 seals the opening end of the outer protective shell 2.

[0024] The thermostat body 1 is the core component for performing temperature sensing and control functions. It contains a bimetallic strip, moving and stationary contacts, and other mechanisms. The thermostat body 1 has a housing structure 11, which can be made of metal to have good thermal conductivity. From the same end of the housing structure 11, a first pin 12 and a second pin 13 are led out and formed respectively. These two pins serve as electrical connection terminals for connecting to external circuits.

[0025] The outer housing 2 has an opening at one end along its length and extends inward to form a protective cavity 21. The outer housing 2 can be integrally molded from insulating engineering plastics, such as PBT or nylon, to provide electrical insulation and mechanical protection. During assembly, the thermostat body 1 is placed inside the protective cavity 21, and the end of the thermostat with the first pin 12 and the second pin 13 is set to face the opening end of the outer housing 2, providing convenient space for subsequent sealing and lead wire connection.

[0026] The sealing layer 3 has two layers along the length direction of the thermostat body 1, i.e. the pin lead-out direction. Specifically, it includes an inner sealing layer 3 and an outer sealing layer 3. The inner sealing layer 3 is first formed and wrapped around the outside of the first pin 12 and the second pin 13, and performs preliminary sealing and fixation on the pin root and the pin itself. The outer sealing layer 3 covers the outside of the inner sealing layer 3, and the end away from the thermostat body 1 fully fills and seals the entire opening of the outer protective shell 2. Even if one of the two sealing layers 3 has a small defect, the other layer can effectively prevent moisture from entering, thereby greatly improving the waterproof reliability and long-term stability of the product, sealing the thermostat inside the outer protective shell 2, and forming a complete waterproof seal protection with the outer protective shell 2.

[0027] In some embodiments of this utility model, such as Figure 1 and Figure 3 As shown, at least one mounting lug 22 is provided on the outer side of the outer housing 2, and each mounting lug 22 has a through mounting hole 23. A mounting lug 22 is provided on the side wall of the outer housing 2 as a mounting structure, which is integrally formed with the outer housing 2 body, for example, by injection molding. A through mounting hole 23 is provided on the mounting lug 22 for standard fasteners such as screws or bolts to pass through, thereby installing and fixing the entire thermostat body 1. Using mounting lug 22 instead of bracket for installation makes the overall installation more flexible.

[0028] Furthermore, such as Figure 1 As shown, multiple mounting ears 22 can be provided on the side wall of the outer housing 2, which are also integrally formed with the outer housing 2. Each mounting ear 22 has an independent through mounting hole 23. These mounting holes 23 are used to allow multiple fasteners to pass through, so as to achieve a more stable installation of the thermostat body 1.

[0029] Based on the above embodiments, the mounting ears 22 are symmetrically arranged on both sides of the outer housing 2 along the length direction and are mirror-distributed relative to the central axis of the outer housing 2, forming a pair of balanced mounting supports. This can effectively prevent the housing from tilting or rotating due to unilateral force, and greatly improve the stability and vibration and impact resistance after installation.

[0030] Alternatively, multiple mounting ears 22 are respectively set on the end face and side face of the outer housing 2, located on different surfaces of the outer housing 2. By setting mounting points on different planes, the thermostat can adapt to various complex installation environments. The mounting ears 22 on the end face provide axial fixing support, while the mounting ears 22 on the side face provide radial fixing support, which can effectively limit the displacement and rotation of the thermostat in all directions, significantly improving the overall stability and vibration resistance after installation.

[0031] In some embodiments of this utility model, the cross-section of the outer protective shell 2 facing the opening direction is quadrilateral or circular.

[0032] The outer housing 2 can be a square or rectangular cylindrical structure, with the four side walls forming a protective cavity 21. The outer housing 2 can be integrally molded from insulating engineering plastic through injection molding. The shape of the inner cavity is adapted to the outer contour of the thermostat body 1 so as to stably accommodate the thermostat body 1. During installation and fixing, it can prevent the entire thermostat module from rotating unexpectedly around its axis, ensuring the accuracy of the installation orientation and simplifying the installation positioning process.

[0033] The outer housing 2 can also be a cylindrical structure, with the inner wall forming a cylindrical protective cavity 21. The smooth inner wall contour provides uniform space for the placement of internal components. When potting to form the outer sealing layer 3, liquid sealing materials such as epoxy resin can flow more smoothly and evenly, avoiding defects such as air bubbles or incomplete filling at the corners. When the cylindrical structure is subjected to external pressure or internal stress, it can achieve uniform stress distribution, which helps to improve the long-term sealing reliability of the product.

[0034] In some embodiments of this utility model, such as Figure 2 As shown, the two sealing layers 3 are a silicone layer and an epoxy resin layer, respectively. The silicone layer of the inner sealing layer 3 has excellent elasticity and flexibility, which can effectively absorb and buffer stress caused by temperature changes or mechanical vibration, prevent the formation of tiny gaps due to asynchronous thermal expansion and contraction, and improve the long-term stability of the sealing interface. The epoxy resin layer of the outer sealing layer 3 has high mechanical strength and hardness, and after molding, it can form a strong physical barrier, effectively resisting external mechanical scratches, impacts, and the intrusion of higher pressure liquids.

[0035] In some embodiments of this utility model, such as Figure 4 As shown, both the first pin 12 and the second pin 13 are connected to external leads 4. The outer sealing layer 3 covers the connection point of the first pin 12, the second pin 13 and the external leads 4, forming a complete and uninterrupted seal, thereby completely isolating the electrical connection points of the first pin 12 and the second pin 13 from the external environment and improving the overall waterproof sealing level.

[0036] Based on the above embodiments, such as Figure 5 As shown, both the first pin 12 and the second pin 13 include a support portion 14 and a covering portion 15. The cross-section of the support portion 14 is arc-shaped, and the covering portion 15 is trapezoidal. They are symmetrically arranged on both sides of the support portion 14. The two covering portions 15 are bent toward the symmetrical central axis of the support portion 14 to form a U-shaped groove 16 for placing the end of the outer lead 4.

[0037] The support portion 14 has an arc-shaped cross-section with a radius slightly larger than the diameter of the outer lead 4 conductor, providing a stable support surface for the outer lead 4. On both sides of the support portion 14, trapezoidal covering portions 15 are symmetrically arranged. Both covering portions 15 are bent towards the symmetrical central axis of the support portion 14. The bending angle is such that the inner edges of the two covering portions 15 and the highest point of the support portion 14 together form a complete U-shaped groove 16. In actual assembly, the U-shaped groove 16 structure provides all-round wrapping support for the outer lead 4 conductor. After the insulation layer is removed from the end of the outer lead 4, the exposed conductor part is precisely placed in this U-shaped groove 16, increasing the contact area between the first pin 12 and the second pin 13 and the outer lead 4, preventing the connection from loosening or breaking due to vibration or pulling.

[0038] In some embodiments of this utility model, such as Figure 4 and Figure 6 As shown, the housing structure 11 includes a first portion 111 and a second portion 112. The first pin 12 and the second pin 13 are respectively disposed at the same end of the first portion 111 and the second portion 112. Dividing the housing structure 11 into two portions reduces the complexity of individual parts, facilitates precise manufacturing through processes such as stamping, and improves production efficiency and product consistency. The split structure provides greater operating space and convenience for the installation and calibration of internal bimetallic strips, contacts, and other actuating mechanisms, which helps to ensure the performance consistency and stability of the product. The first pin 12 and the second pin 13 are respectively disposed on the first portion 111 and the second portion 112, increasing the creepage distance, reducing the possibility of short circuits between pins, and improving the electrical safety performance of the product.

[0039] Based on the above embodiments, such as Figure 6 As shown, the first part 111 is recessed on one side to form a receiving cavity 1111, and the second part 112 is located on the opening side of the receiving cavity 1111, and its two sides are bent and engaged at the edge of the first part 111.

[0040] The receiving cavity 1111 is used to install temperature sensing elements such as bimetallic strips and actuating elements such as moving contacts. After the internal components are assembled, the second part 112 is subjected to process force through the metal edges on both sides, causing it to bend and extend upwards, and then engages inwards with the corresponding groove or flange on the outer edge of the first part 111, realizing a firm mechanical connection between the first part 111 and the second part 112, which together form a closed shell structure 11 that can effectively protect the internal core components.

[0041] Based on the above embodiments, such as Figure 6As shown, an insulating plate 113, made of an electrically insulating material such as mica sheet or high-temperature resistant engineering plastic film, is disposed between the first section 111 and the second section 112. Its outline matches the opening edge of the first section 111, preventing the risk of internal short circuits caused by contact between the first section 111 and the second section 112, thus improving the electrical safety level of the product and ensuring its safe application in complex circuits. A clearance hole 1131 is provided in the middle of the insulating plate 113, corresponding to the receiving cavity 1111. This ensures that the temperature-sensing element inside the receiving cavity 1111 of the first section 111 can achieve necessary mechanical interaction with the second section 112 below through the clearance hole 1131, such as when the moving contact contacts the stationary contact, it is not blocked by the insulating plate 113.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A highly sensitive waterproof temperature controller, characterized in that, include: The thermostat body (1) has a housing structure (11), and the same end of the housing structure (11) leads out to form a first pin (12) and a second pin (13); The outer housing (2) has an opening along its length and extends inward to form a protective cavity (21). The thermostat body (1) is disposed in the protective cavity (21), and the first pin (12) and the second pin (13) are disposed on the side facing the opening end of the outer housing (2). The sealing layer (3) has two layers along the length of the thermostat body (1), which wrap around the outside of the first pin (12) and the second pin (13), and the sealing element of the outer layer away from the thermostat body (1) seals the opening end of the outer protective shell (2).

2. The highly sensitive waterproof temperature controller according to claim 1, characterized in that, At least one mounting ear (22) is provided on the outer side of the outer housing (2), and each mounting ear (22) is provided with a through mounting hole (23).

3. The highly sensitive waterproof temperature controller according to claim 2, characterized in that, Multiple mounting ears (22) are symmetrically arranged on both sides of the outer housing (2) along the length direction; Alternatively, multiple mounting ears (22) may be respectively disposed on the end face and side face of the outer housing (2).

4. The highly sensitive waterproof temperature controller according to claim 1, characterized in that, The outer protective shell (2) has a quadrilateral or circular cross section facing the opening direction.

5. The highly sensitive waterproof temperature controller according to claim 1, characterized in that, The two sealing layers (3) are a silicone layer and an epoxy resin layer, respectively.

6. The highly sensitive waterproof temperature controller according to claim 1, characterized in that, Both the first pin (12) and the second pin (13) are connected to external leads (4), and the sealing layer (3) located on the outer layer covers the connection point of the first pin (12), the second pin (13) and the external leads (4).

7. The highly sensitive waterproof temperature controller according to claim 6, characterized in that, Both the first pin (12) and the second pin (13) include a support portion (14) and a covering portion (15). The support portion (14) has a circular arc cross section, and the covering portion (15) is trapezoidal and symmetrically arranged on both sides of the support portion (14). The two covering portions (15) are bent toward the symmetrical central axis of the support portion (14) to form a U-shaped groove (16) for placing the end of the outer lead (4).

8. The highly sensitive waterproof temperature controller according to claim 1, characterized in that, The housing structure (11) includes a first part (111) and a second part (112), with the first pin (12) and the second pin (13) respectively disposed at the same end of the first part (111) and the second part (112).

9. The highly sensitive waterproof temperature controller according to claim 8, characterized in that, The first portion (111) is recessed on one side to form a receiving cavity (1111), and the second portion (112) is located on the opening side of the receiving cavity (1111), and both sides are bent and engaged at the edge of the first portion (111).

10. The highly sensitive waterproof temperature controller according to claim 9, characterized in that, An insulating plate (113) is provided between the first part (111) and the second part (112), and a clearance hole (1131) is provided in the middle of the insulating plate (113), which corresponds to the receiving cavity (1111).

Images