Sealed temperature control device
The sealed temperature control device addresses safety and assembly issues in hermetic devices by using a ceramic box and base design with a temperature-sensitive cover, ensuring easy assembly and reliable circuit interruption.
Patent Information
- Application Number
- JP2024042526
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-01-26
- Filing Date
- 2024-03-18
- Publication Date
- 2025-08-07
- Estimated Expiration
- 2044-03-18
AI Technical Summary
Existing hermetic temperature control devices, such as bimetal thermal circuit breakers, suffer from poor sealing and complex assembly, posing safety risks and assembly challenges.
A sealed temperature control device with a ceramic box and base, featuring a temperature-sensitive sheet, action mechanism, and temperature-sensitive cover, which ensures easy assembly and enhanced safety through a rational structure.
The device provides a sealed and easy-to-assemble structure with improved electrical safety, ensuring reliable circuit interruption and easy replacement of temperature-sensitive components.
Smart Images
Figure 2025115920000001_ABST
Abstract
Description
[Technical Field]
[0001] The present invention relates to the technical field of thermostats, and more particularly to hermetic temperature control devices. [Background technology]
[0002] Temperature sensors are temperature-sensitive controllers with self-action protection, circuit-breaking hold, and self-resetting functions in the event of a power outage. They are versatile and flexible, protecting electrical appliances from overheating and preventing damage. Bimetal overheat thermostats are one of the most common. Their mechanism is to sense the temperature of electrical appliances by contact with the heat source, causing the bimetal to jump and deform, driving the power terminal to cut off the circuit and quickly shut off the electrical appliance.
[0003] For example, the bimetal thermal circuit breaker disclosed in Chinese Patent CN103337410A includes a bimetal, a ceramic pusher, an action sheet, a receiving sheet, and a receiving terminal. A mounting cavity is provided in the ceramic base, the bimetal is enclosed in the mounting cavity, and a metal temperature-sensitive mounting bracket is provided at a port of the mounting cavity, which is used to contact a heat source and conduct heat to the bimetal. The metal temperature-sensitive bracket is made of an aluminum alloy plate and is attached to the port of the ceramic base and riveted to the port. This structure results in poor sealing of the mounting cavity in the ceramic base, making assembly complicated and posing a potential risk to the electrical safety of the circuit breaker.
[0004] Therefore, there is room for improvement and development in the current technology. Summary of the Invention [Problem to be solved by the invention]
[0005] SUMMARY OF THE INVENTION The object of the present invention is to provide a sealed temperature control device that has a reasonable structure, is easy to assemble, and is highly safe, in view of the defects and shortcomings of the prior art. [Means for solving the problem]
[0006] To achieve the above object, the present invention adopts the following technical solutions.
[0007] A sealed temperature control device including a ceramic box and a base, The base has a cavity structure with an opening, the base and the ceramic box are fixedly connected, and a guide hole is provided between the base and the ceramic box; A temperature-sensitive sheet is provided in the base, an action mechanism is provided in the ceramic box, and an action lever that connects the temperature-sensitive sheet and the action mechanism is provided in the guide hole, A temperature sensitive cover is provided at the opening of the base.
[0008] According to the above embodiment, the temperature-sensitive cover is fitted into the opening of the base to seal the opening, and protrusions are formed on the inner surface of the temperature-sensitive cover to position and fit onto both ends of the temperature-sensitive sheet.
[0009] According to the above embodiment, the temperature-sensitive sheet includes a bimetal and an energy storage steel plate, the bimetal and the energy storage steel plate all having the same shape and size, the bimetal is stacked on the energy storage steel plate, the bimetal is abutted and connected to the temperature-sensitive cover, and both ends of the action lever are abutted and connected to the energy storage steel plate of the temperature-sensitive sheet and the action mechanism, respectively.
[0010] According to the above embodiment, the ceramic box has a cavity structure with an open bottom, the action mechanism includes two receiving terminals, limiting posts are provided at both ends of the cavity of the ceramic box, engaging holes are provided in the receiving terminals, the two receiving terminals are pulled out from both ends of the ceramic box, the receiving terminals and the ceramic box are matingly connected by the limiting posts and the engaging holes, a connecting elastic piece is movably connected between the two receiving terminals, and the connecting elastic piece is provided with an action point for abutting against and connecting to the action lever.
[0011] According to the above embodiment, the fixing plates are symmetrically provided on both sides of the base.
[0012] According to the above aspect, a fine adjustment mechanism capable of finely adjusting the action stroke of the action lever is provided inside the action lever.
[0013] According to the above embodiment, the fine adjustment mechanism includes a contact lever, a support plate, a guide lever, a magnetic plate, an electromagnet 1, and an electromagnet 2, the support plate is fixed to the inner wall of the action lever, the lower end of the guide lever is fixed to the magnetic plate, the upper end of the guide lever passes through the support plate and the electromagnet 2 and is fixed to the inner wall of the action lever at an interval, the electromagnet 2 is located above the magnetic plate, and the electromagnet 1 is located below the magnetic plate, an engagement mechanism is provided between the outer wall of the contact lever and the inner wall of the action lever, and the upper end of the contact lever extends from the action lever and abuts against the action mechanism.
[0014] According to the above embodiment, the engagement mechanism includes a plurality of locking holes spaced apart vertically on the inner wall of the action lever, and an attachment disk provided on the contact lever, an elastic lever is provided on the attachment disk, an engagement ball is provided on the elastic lever, the engagement ball and the locking hole are engaged and fitted, and a spring 2 is fixed between the bottom of the contact lever and the top of the support plate.
[0015] According to the above embodiment, an attachment mechanism is provided on the outer wall of the fixing plate, the attachment mechanism includes an attachment plate, a gasket, and a bolt, the attachment plate is fixed to the fixing plate, an oblong hole is provided in the attachment plate, the threaded rod of the bolt passes through the gasket and the oblong hole and is fixed to the attachment member, a limiting mechanism 1 that limits the bolt is provided on the attachment plate, and a guard is provided outside the nut of the bolt.
[0016] According to the above embodiment, a limiting groove is provided on the outer circumference of the threaded rod of the bolt, the limiting mechanism 1 includes a screw, a threaded block, and a limiting rod which are symmetrically provided on the mounting plate, the threaded rod of the screw is threadedly connected to one end of the threaded block, the threaded block is slidably provided within the mounting plate, and the other end of the threaded block is fixedly connected to the limiting rod, which extends into the oval hole and engages with the limiting groove, and the mounting plate is provided with a limiting mechanism 2 for restricting the screw.
[0017] According to the above embodiment, an insertion hole is provided on the outer circle of the threaded rod of the screw, the limiting mechanism 2 includes an insertion rod, the lower end of the insertion rod engages with the insertion hole, and the upper end of the insertion rod extends from the mounting plate, and the insertion rod is slidably connected to the mounting plate.
[0018] According to the above embodiment, a limiting step is provided on the outer wall of the end of the insertion rod close to the insertion hole, and the spring 1 is fixed between the limiting step and the inner wall of the attachment plate.
[0019] According to the above embodiment, the elastic engaging ball is provided on the inner wall of the guard, the engaging groove is provided on the outer wall of the nut of the bolt, and the elastic engaging ball is engaged and fitted into the engaging groove. [Effects of the Invention]
[0020] The present invention has a rational structure, in which the temperature-sensitive cover fixes the temperature-sensitive sheet in the cavity of the base and closes the opening of the base, making the entire structure easy to assemble and highly reliable. [Brief explanation of the drawings]
[0021] [Figure 1] 1 is a schematic diagram of the entire closed-type temperature control device in Example 1. FIG. [Figure 2] 1 is a cross-sectional view of a sealed temperature control device according to a first embodiment. [Figure 3] 1 is an exploded schematic view of a sealed temperature control device according to a first embodiment. FIG. [Figure 4] FIG. 10 is a schematic diagram of the entire closed-type temperature control device in Example 2. [Figure 5] FIG. 10 is a cross-sectional view of a sealed temperature control device according to a second embodiment. [Figure 6] FIG. 10 is a schematic diagram of a fine adjustment mechanism in the second embodiment. [Figure 7] FIG. 6 is an enlarged schematic view of part A in FIG. 5. [Figure 8] FIG. 10 is a schematic diagram of an attachment mechanism in the third embodiment. [Figure 9] FIG. 9 is an enlarged schematic view of part B in FIG. 8. [Figure 10] FIG. 9 is an enlarged schematic view of part C in FIG. 8. DETAILED DESCRIPTION OF THE INVENTION
[0022] Hereinafter, the technical aspects of the present invention will be described with reference to the drawings and examples. Example 1
[0023] 1 to 3, the sealed temperature control device according to the present invention includes a ceramic box 1 and a base 11, the base 11 having a cavity structure with an opening, the base 11 and the ceramic box 1 being fixedly connected, a guide hole 5 between the base 11 and the ceramic box 1, a temperature-sensitive sheet 2 provided within the base 11, an action mechanism 3 provided within the ceramic box 1, an action lever 21 connecting the temperature-sensitive sheet 2 to the action mechanism 3 provided within the guide hole 5, and a temperature-sensitive cover 6 provided in the opening of the base 11. According to the configuration of the present invention, the action mechanism 3 includes a power receiving piece, one end of which is fixedly connected to one of the power receiving terminals 31 and the other end of which is detachably connected to the other of the power receiving terminals 31 by a connecting elastic piece 9, the temperature-sensitive sheet 2 senses the temperature of the temperature-sensitive cover 6 and jumps to deform, driving the power receiving piece via the action lever 21 to break the circuit. The temperature-sensitive sheet 2 of the present invention is sealed within the cavity of the base 11 by the temperature-sensitive cover 6, and the temperature-sensitive cover 6 and base 11 define the position of the temperature-sensitive sheet 2, while the cavity in the base 11 allows deformation of the temperature-sensitive sheet 2. The temperature-sensitive cover 6 closes the opening of the base 11 to form a sealed structure, and the ceramic box 1 is manufactured using a high-temperature resistant ceramic material, so the temperature-sensitive cover 6 can increase the structural strength of the base 11, and the sealed structure ensures the electrical safety of the mechanism within the ceramic box 1.
[0024] In this embodiment, the temperature-sensitive cover 6 is fitted into the opening of the base 11 to seal the opening, and protrusions are formed on the inner surface of the temperature-sensitive cover 6 to position and fit onto both ends of the temperature-sensitive sheet 2. According to the configuration of the present invention, the temperature-sensitive sheet 2 employs a rectangular dome structure, which deforms at a critical temperature to invert the curved surface, and the center of the inverted arc surface presses the action lever 21.
[0025] In this embodiment, the temperature-sensitive sheet 2 includes a bimetal 22 and an energy storage steel plate 23, the bimetal 22 and the energy storage steel plate 23 all having the same shape and size, and the bimetal 22 is laminated on the energy storage steel plate 23, the bimetal 22 abuttingly connected to the temperature-sensitive cover 6, and both ends of the action lever 21 abuttingly connected to the energy storage steel plate 23 of the temperature-sensitive sheet 2 and the action mechanism 3, respectively. According to the configuration of the present invention, a preferred temperature-sensitive sheet 2 is provided with the energy storage steel plate 23, and when the temperature of the applicable environment exceeds a set temperature, the bimetal 22 deforms and presses the center of the arc surface of the energy storage steel plate 23, causing the energy storage steel plate 23 to flip, which then drives the action mechanism 3 to break the circuit. When the temperature drops after a power outage, the bimetal 22 automatically resets, but the energy storage steel plate 23 does not. Therefore, it is necessary to inspect the electrical appliance and reset it by replacing the temperature-sensitive sheet 2. The temperature-sensitive sheet 2 is composed of two types of action sheets, and the performance of the materials of the bimetal 22 and the energy storage steel plate 23 can be selected according to the application environment, thereby expanding the range of use of the thermostat.
[0026] In addition, the temperature-sensitive sheet 2 of the present invention is a single-time shut-off design, that is, the deformation at the critical temperature cannot be automatically recovered, and the thermostat must be disassembled to restore or replace the temperature-sensitive sheet 2, and the groove 15 is used to rivet the temperature-sensitive cover 6 to the base 11.
[0027] In this embodiment, the ceramic box 1 has a cavity structure with an open bottom, and the action mechanism 3 includes two power receiving terminals 31. Limiting posts 16 are provided at both ends of the cavity of the ceramic box 1, and the power receiving terminals 31 are provided with engagement holes 32. The two power receiving terminals 31 are drawn out from both ends of the ceramic box 1, and the power receiving terminals 31 and the ceramic box 1 are mated and connected to each other via the limiting posts 16 and the engagement holes 32. A connecting elastic piece 9 is connected between the two power receiving terminals, and the connecting elastic piece 9 is provided with an action point 10 for abutting and connecting with the action lever 21. According to the configuration of the present invention, the power receiving terminal 31 is fixed by the limiting post 16 and the connecting elastic piece 9 is provided with the action point 10, which improves the contact effect between the action lever 21 and the connecting elastic piece 9, prevents unnecessary sliding, and provides a more stable circuit interruption effect.
[0028] In this embodiment, fixing plates 4 are provided symmetrically on both sides of the base 11. According to the configuration of the present invention, the fixing plates 4 make it easy to fix the base 11 to the corresponding device, and assembly is easy. Example 2
[0029] As shown in Figures 4 to 7, a fine adjustment mechanism 13 is provided within the action lever 21, which can finely adjust the action stroke of the action lever 21. According to the configuration of the present invention, the fine adjustment mechanism 13 is added within the action lever 21, and this fine adjustment mechanism 13 can finely adjust the action stroke of the action lever 21. As a result, when using a conventional sealed temperature control device, factors such as the characteristics of the temperature-sensitive sheet 2 itself can affect the action of the action lever 21 over long periods of use, which can cause a problem in that the power receiving contact cannot be reliably shut off.
[0030] In this embodiment, the fine adjustment mechanism 13 includes a contact lever 131, a support plate 132, a guide lever 133, a magnetic plate 134, an electromagnet 1136, and an electromagnet 21361. The support plate 132 is fixed to the inner wall of the action lever 21, the lower end of the guide lever 133 is fixed to the magnetic plate 134, and the upper end of the guide lever 133 passes through the support plate 132 and is fixed to the bottom of the contact lever 131. The guide lever 133 is slidably connected to the support plate 132. The electromagnets 1136 and 21361 are fixed to the inner wall of the action lever 21 at intervals, the electromagnet 21361 being located above the magnetic plate 134, and the electromagnet 1136 being located below the magnetic plate 134. An engagement mechanism is provided between the outer wall of the contact lever 131 and the inner wall of the action lever 21, and the upper end of the contact lever 131 extends from the action lever 21 to abut against the action mechanism 3. According to the configuration of the present invention, if the action of the action lever 21 is limited due to factors such as the characteristics of the temperature-sensitive sheet 2 itself (e.g., if the deformation effect of the temperature-sensitive sheet 2 is poor), preventing the power receiving piece from being reliably disconnected, the electromagnet 21361 is activated to magnetically attract the magnetic plate 134, causing the contact lever 131 fixed to the magnetic plate 134 and guide lever 133 to move upward, contacting the power receiving piece and pushing it open, effectively disconnecting the circuit. Alternatively, the electromagnet 1136 may be activated to magnetically attract the magnetic plate 134, causing the contact lever 131 fixed to the magnetic plate 134 and guide lever 133 to move downward, allowing the connecting elastic piece 9 to reset normally and reconnect the circuit. In actual application, the guide lever 133 is slidably connected to the support plate 132, which acts to limit and guide the guide lever 133, making the up and down movement of the contact lever 131 more stable.
[0031] In this embodiment, the engagement mechanism includes a plurality of locking holes 137 formed at intervals in the vertical direction on the inner wall of the action lever 21, and a mounting disk 138 provided on the contact lever 131, an elastic lever 139 is provided on the mounting disk 138, an engagement ball 1391 is provided on the elastic lever 139, the engagement ball 1391 is engaged with the locking hole 137, and a spring 2135 is fixed between the bottom of the contact lever 131 and the top of the support plate 132. According to the configuration of the present invention, the engagement ball 1391 is engaged with the locking hole 137, thereby realizing engagement when the action lever 21 moves up and down, and the position of the contact lever 131 is precisely controlled. More specifically, as shown in FIG. 6, the engagement ball 1391 engages and fits into one side of the locking hole 137, and when the contact lever 131 moves up and down, the inner wall of the action lever 21 presses against the engagement ball 1391, deforming the elastic lever 139 and putting it into a compressed state, and the engagement ball 1391 disengages from this locking hole 137, and when the engagement ball 1391 corresponds to the other position of the locking hole 137, the elastic lever 139 recovers its deformation, and the repulsive force causes the engagement ball 1391 to engage with the other side of the locking hole 137.
[0032] In this second embodiment, compared to the first embodiment, a fine adjustment mechanism 13 capable of finely adjusting the action stroke of the action lever 21 is added inside the action lever 21, but the remaining structure and principles are the same as those of the first embodiment, so no further description will be given. Example 3
[0033] 8 to 10, mounting mechanism 12 is provided on the outer wall of fixing plate 4, and mounting mechanism 12 includes mounting plate 121, gasket 123, and bolt 124. Mounting plate 121 is fixed to fixing plate 4, and oblong hole 122 is formed in mounting plate 121. The threaded rod of bolt 124 passes through gasket 123 and oblong hole 122 and is fixed to a mounting member. Mounting plate 121 is provided with limiting mechanism 1 that limits bolt 124, and guard 1211 is provided on the outside of the nut of bolt 124. According to the configuration of the present invention, when fixing the sealed temperature control device, the threaded rod of bolt 124 passes through gasket 123 and oblong hole 122 and is fixed to the mounting member. Here, oblong hole 122 makes it easy to adjust the position of bolt 124, and later, it becomes easy to assemble bolt 124 with the screw hole and nut receiver of the mounting member for use, and operation is easy. The mounting plate 121 is provided with a limiting mechanism 1 for limiting the bolt 124, which prevents problems such as the bolt 124 shifting and becoming loose due to vibration. A guard 1211 is provided on the outside of the nut of the bolt 124 to protect the bolt 124, prevent problems such as rusting of the bolt 124, and extend its service life.
[0034] In this embodiment, a limiting groove 125 is provided on the outer circumference of the threaded rod of the bolt 124, and the limiting mechanism 1 includes a screw 127, a threaded block 128, and a limiting rod 129, which are symmetrically provided on the mounting plate 121, the threaded rod of the screw 127 is threadedly connected to one end of the threaded block 128, the threaded block 128 is slidably provided within the mounting plate 121, and the other end of the threaded block 128 is fixedly connected to the limiting rod 129, which extends into the oblong hole 122 and engages with the limiting groove 125, and the mounting plate 121 is provided with a limiting mechanism 2 for restricting the screw 127. With the configuration of the present invention, when bolt 124 is fitted into the threaded hole of the mounting member and tightened, screw 127 is turned to slide threaded block 128 relative to mounting plate 121, and limiting rod 129 extends into oval hole 122 to engage and fit with limiting groove 125, thereby preventing problems such as bolt 124 becoming misaligned and loosened due to vibration. When removing the bolt 124, first turn screw 127 to drive threaded block 128, which removes limiting rod 129 from limiting groove 125, and then turn bolt 124.
[0035] In this embodiment, an insertion hole 1271 is formed on the outer circumference of the threaded rod of the screw 127, and the limiting mechanism 2 includes an insertion rod 126, the lower end of which engages with the insertion hole 1271, and the upper end of which extends from the mounting plate 122 and is slidably connected to the mounting plate 122. According to the configuration of the present invention, the screw 127 is turned to drive the threaded block 128, causing the limiting rod 129 to extend and engage with the limiting groove 125, and then the lower end of the insertion rod 126 engages with the insertion hole 1271, thereby achieving engagement with the screw 127 and avoiding the problem of the screw 127 becoming misaligned due to vibration. To remove the screw 127, the insertion rod 126 is removed from the insertion hole 1271 before turning the screw 127.
[0036] In this embodiment, a limiting step 1261 is provided on the outer wall of the end of the insertion rod 126 that is closest to the insertion hole 1271, and a spring 11210 is fixed between the limiting step 1261 and the inner wall of the mounting plate 122. According to the configuration of the present invention, the insertion rod 126 is always positioned within the insertion hole 1271 due to the elastic force of the spring 11210, and when it is necessary to turn the screw 127, the insertion rod 126 is first extracted from the insertion hole 1271, and at this time, the spring 11210 is compressed to stop turning the screw 127, and the insertion rod 126 is released, and the elastic force of the spring 11210 causes the insertion rod 126 to be reinserted into the insertion hole 1271.
[0037] In this embodiment, elastic engaging balls 1212 are provided on the inner wall of the guard 1211, and engaging grooves 1213 are provided on the outer wall of the nut of the bolt 124, and the elastic engaging balls 1212 engage with and fit into the engaging grooves 1213. This configuration of the present invention improves the covering effect when the guard 1211 is attached to the outer wall of the nut of the bolt 124, and prevents peeling. More specifically, when the guard 1211 is fitted onto the outer wall of the nut of the bolt 124, the outer wall of the nut of the bolt 124 presses and deforms the elastic engaging balls 1212, and due to the action of force, the elastic engaging balls 1212 move along the outer wall of the nut of the bolt 124. When the elastic engaging balls 1212 correspond to the position of the engaging grooves 1213, the elastic engaging balls 1212 recover their deformation and enter the engaging grooves 1213, thereby engaging the guard 1211 with the nut of the bolt 124.
[0038] In this third embodiment, compared to the first embodiment, an attachment mechanism 12 is added to the outer wall of the fixed plate 4, but the remaining structure and principles are all the same as those of the first embodiment, and therefore will not be further described. The above are merely preferred embodiments of the present invention, and any equivalent changes or modifications made based on the structures, features and principles described in the scope of the patent application of the present invention shall be included in the scope of the patent application of the present invention. [Explanation of symbols]
[0039] 1 ceramic box 2. Thermosensitive sheet 3 Action mechanism 4 Fixed plate 5 Guide hole 6 Thermosensitive cover 9 Connecting elastic piece 10 Action Points 11. Base 12 Mounting mechanism 121 Mounting plate 122 Oblong hole 123 Gasket 124 volts 125 Restriction groove 126 Insertion Rod 1261 Restricted Steps 127 Screw 1271 Insertion hole 128 Threaded Block 129 Restriction Rod 1210 Spring 1 1211 Guard 1212 Elastic engagement ball 1213 Engagement groove 13 Fine adjustment mechanism 131 Contact lever 132 Support plate 133 Guide lever 134 Magnetic plate 135 Spring 2 136 Electromagnet 1 1361 Electromagnet 2 137 Locking hole 138 Mounting Disc 139 Elastic Lever 1391 Engagement ball 16 Restricted Post 21 Action lever 22 Bimetal 23 Energy storage steel plate 31 Power receiving terminal 32 Engagement hole
Claims
1. A sealed temperature control device including a ceramic box and a base, The base has a cavity structure with an opening, the base and the ceramic box are fixedly connected, and a guide hole is provided between the base and the ceramic box; A temperature-sensitive sheet is provided in the base, an action mechanism is provided in the ceramic box, and an action lever that connects the temperature-sensitive sheet and the action mechanism is provided in the guide hole, A sealed temperature control device characterized in that a temperature-sensitive cover is provided at the opening of the base.
2. 2. The sealed temperature control device according to claim 1, wherein the temperature-sensitive cover is fitted into the opening of the base to seal the opening, and a protrusion is formed on the inner surface of the temperature-sensitive cover to position and fit with both ends of the temperature-sensitive sheet.
3. 2. The sealed temperature control device of claim 1, wherein the temperature-sensitive sheet includes a bimetal and an energy storage steel plate, the bimetal and the energy storage steel plate all having the same shape and size, the bimetal is laminated on the energy storage steel plate, the bimetal is abutted and connected to the temperature-sensitive cover, and both ends of the action lever are abutted and connected to the energy storage steel plate of the temperature-sensitive sheet and the action mechanism, respectively.
4. 2. The sealed temperature control device of claim 1, wherein the ceramic box has a cavity structure with an open bottom, the action mechanism includes two receiving terminals, limiting posts are provided at both ends of the cavity of the ceramic box, engaging holes are provided in the receiving terminals, the two receiving terminals are pulled out from both ends of the ceramic box, the receiving terminals and the ceramic box are fitted and connected by the limiting posts and engaging holes, a connecting elastic piece is movably connected between the two receiving terminals, and the connecting elastic piece is provided with an action point for abutting and connecting with an action lever.
5. 2. The sealed temperature control device according to claim 1, wherein fixing plates are symmetrically provided on both sides of the base.
6. 2. The sealed temperature control device according to claim 1, wherein a fine adjustment mechanism is provided in the action lever to enable fine adjustment of the action stroke of the action lever.
7. 7. The sealed temperature control device of claim 6, wherein the fine adjustment mechanism includes a contact lever, a support plate, a guide lever, a magnetic plate, an electromagnet 1, and an electromagnet 2, the support plate is fixed to the inner wall of the action lever, the lower end of the guide lever is fixed to the magnetic plate, the upper end of the guide lever passes through the support plate and the electromagnet 2 and is fixed to the inner wall of the action lever at intervals, the electromagnet 2 is located above the magnetic plate, and the electromagnet 1 is located below the magnetic plate, an engagement mechanism is provided between the outer wall of the contact lever and the inner wall of the action lever, and the upper end of the contact lever extends from the action lever to abut against the action mechanism.
8. The sealed temperature control device of claim 7, characterized in that the engagement mechanism includes a plurality of locking holes spaced apart vertically on the inner wall of the action lever and an attachment disk provided on the contact lever, an elastic lever is provided on the attachment disk, an engagement ball is provided on the elastic lever, the engagement ball and the locking hole are engaged and fitted together, and a spring 2 is fixed between the bottom of the contact lever and the top of the support plate.
9. 6. The sealed temperature control device according to claim 5, wherein an attachment mechanism is provided on the outer wall of the fixing plate, the attachment mechanism including an attachment plate, a gasket, and a bolt, the attachment plate is fixed to the fixing plate, an oblong hole is provided in the attachment plate, the threaded rod of the bolt passes through the gasket and the oblong hole and is fixed to the attachment member, a limiting mechanism 1 is provided on the attachment plate to limit the bolt, and a guard is provided on the outside of the nut of the bolt.
10. 10. The sealed temperature control device of claim 9, wherein the threaded rod of the bolt has a limiting groove on its outer circumference, the limiting mechanism (1) includes a screw, a threaded block, and a limiting rod symmetrically arranged on the mounting plate, the threaded rod of the screw is threadedly connected to one end of the threaded block, the threaded block is slidably arranged in the mounting plate, and the other end of the threaded block is fixedly connected to the limiting rod, which extends into the oval hole and engages with the limiting groove, and the mounting plate is provided with a limiting mechanism (2) for limiting the screw.
11. 11. The sealed temperature control device of claim 10, wherein an insertion hole is provided on the outer circumference of the threaded rod of the screw, the limiting mechanism 2 includes an insertion rod, the lower end of the insertion rod engages with the insertion hole, the upper end of the insertion rod extends from the mounting plate, and the insertion rod is slidably connected to the mounting plate.
12. 12. The sealed temperature control device according to claim 11, wherein a limiting step is provided on the outer wall of the end of the insertion rod close to the insertion hole, and a spring 1 is fixed between the limiting step and the inner wall of the mounting plate.
13. 10. The sealed temperature control device according to claim 9, wherein an elastic engaging ball is provided on an inner wall of the guard, an engaging groove is provided on an outer wall of the nut of the bolt, and the elastic engaging ball is engaged and fitted into the engaging groove.