Expansion type temperature controller

Abstract

The utility model discloses an expansion type temperature controller, which comprises a ceramic bottom shell, a base sealing cover, a diaphragm capsule and the like, and is also provided with a middle shell pressed between the ceramic bottom shell and the base sealing cover, a spring base is integrally formed on the middle shell, and a ceramic ejector rod is telescopically connected to a through hole of the spring base. A connecting platform is arranged between the spring base and the middle shell, and a connecting gap is formed by a left limiting step and a right limiting step on the connecting platform and used for being clamped into the side wall of the base sealing cover. The expansion type temperature controller has the advantages that the spring base is integrally formed in the middle shell, so that assembly parts are reduced, the assembly efficiency is improved, and the cost is reduced; meanwhile, the structural stability is enhanced through integrated design and unique connection gaps, and disassembly, assembly and maintenance are convenient; in addition, the reset spring is of a frustum structure, the service life is prolonged, and reliability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature controllers, in particular to an expansion type temperature controller. Background Art

[0002] In the prior art, expansion thermostats are a common temperature control device that is widely used in many fields. However, there are some areas that need to be improved in the structural design of traditional expansion thermostats.

[0003] On the one hand, component assembly is complex. Components like the spring base often need to be assembled separately, resulting in a large number of parts required for assembly. This not only increases assembly difficulty and time, but also reduces assembly efficiency and increases overall costs. Furthermore, overloading the assembly with too many components can lead to loose connections over time, compromising the performance and stability of the thermostat.

[0004] On the other hand, traditional designs typically rely on various fasteners to connect the ceramic base, base cover, and mid-shell. This connection method not only increases the number of parts and costs, but also makes disassembly and assembly cumbersome when repairing or replacing components on the thermostat, hindering quick maintenance and upkeep.

[0005] In summary, the existing expansion thermostat has many deficiencies in structural design and assembly methods. A new structural design is urgently needed to solve these problems in order to improve product performance, stability and production efficiency, and reduce costs. Utility Model Content

[0006] In view of the deficiencies in the background technology, the utility model provides an expansion type temperature controller.

[0007] The technical solution adopted by the utility model is: an expansion type thermostat, comprising a ceramic bottom shell, a base cover, a membrane box, an operating rod, a reed, a return spring, a ceramic ejector and a spring base, and further comprising a middle shell tightly fixed between the ceramic bottom shell and the base cover, the spring base being integrally formed on the middle shell, and the ceramic ejector being telescopically connected to a through hole of the spring base;

[0008] A connecting platform is integrally formed between the spring base and the middle shell, a left limiting step is provided on the upper end surface of the connecting platform, and a right limiting step is provided on the upper surface of the middle shell. A connecting gap is formed between the left limiting step and the right limiting step for the side wall of the base cover to be snapped into.

[0009] Furthermore, the two ends of the middle shell are provided with connecting bosses, and the two sides of the base cover are provided with connecting grooves that are interlocked with the connecting bosses.

[0010] Furthermore, a reed seat is provided at the bottom of the ceramic bottom shell, one end of the reed seat is provided with a plurality of positioning columns, and one end of the reed is provided with a positioning hole that fits with the positioning columns.

[0011] Furthermore, the bottom of the reed seat has a "U"-shaped gap.

[0012] Furthermore, the return spring is a frustum structure that is smaller at the top and larger at the bottom.

[0013] The beneficial effects of the utility model are:

[0014] 1. Improved assembly efficiency: The spring base is integrally molded into the center housing, significantly reducing the number of components. This simplifies the previously complex process of piecemeal assembly, eliminating the time and effort required for tedious component docking and installation, significantly improving assembly efficiency.

[0015] 2. Reduce costs: The reduction in the number of parts improves assembly efficiency. The improvement in assembly efficiency reduces labor costs, effectively reducing the overall production cost of the product and enhancing the price competitiveness of the product in the market.

[0016] 3. Improved Stability: The integrated design of the spring base and the middle housing reduces gaps and the risk of loosening between components during assembly. This compact structure allows the thermostat to better withstand external forces such as vibration and impact during long-term use, ensuring the stability of the internal structure, thereby ensuring the reliability and stability of the thermostat's performance and extending the product's service life.

[0017] 4. Simplified housing connection: A connecting platform is provided between the spring base and the middle housing. A connecting gap is formed by a left stop step and a right stop step on the middle housing. This gap snaps directly into the side wall of the base cover. This connection method eliminates traditional fasteners, reduces the number of parts, and ensures a stable connection between the ceramic bottom shell, base cover, and middle housing.

[0018] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the present utility model.

[0020] Figure 2 It is a cross-sectional schematic diagram of the present invention.

[0021] Figure 3 Schematic diagram of the middle shell and ceramic ejector pin.

[0022] Figure 4 Schematic diagram of the ceramic bottom shell and reed.

[0023] Figure 5 Schematic diagram of the structure of the middle shell.

[0024] Figure 1-5 Center: 1. Ceramic bottom shell; 2. Base cover; 3. Diaphragm box; 4. Operating lever; 5. Reed; 6. Return spring; 7. Ceramic ejector pin; 8. Spring base; 9. Middle shell; 10. Through hole; 11. Connecting platform; 12. Left limit step; 13. Right limit step; 14. Connecting gap; 15. Connecting boss; 16. Connecting groove; 17. Reed seat; 18. Positioning column; 19. Positioning hole; 20. "U" clearance gap. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), such directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] The utility model provides an expansion type temperature controller.

[0028] In this embodiment, referring to Figure 1-5 The expansion thermostat includes a ceramic bottom shell 1, a base cover 2, a membrane box 3, an operating rod 4, a reed 5, a return spring 6, a ceramic ejector 7, and a spring base 8. It also includes a middle shell 9 that is tightly fixed between the ceramic bottom shell and the base cover. The spring base is integrally formed on the middle shell, and the ceramic ejector is telescopically connected to the through hole 10 of the spring base.

[0029] A connecting platform 11 is integrally formed between the spring base 8 and the middle shell 9. A left limiting step 12 is provided on the upper end surface of the connecting platform 11. A right limiting step 13 is provided on the upper surface of the middle shell. A connecting gap 14 is formed between the left limiting step and the right limiting step for the side wall of the base cover to be snapped into.

[0030] In the above technical solution, a middle housing is added and the spring base is integrally formed thereon, which reduces the number of parts, simplifies the assembly process, improves assembly efficiency, and reduces production costs.

[0031] In addition, a connection gap is formed by connecting the left limit step on the platform and the right limit step on the middle shell, which is used to snap into the side wall of the base cover. No additional fasteners are required for fixing the middle shell, which enhances the stability of the connection between the ceramic bottom shell, base cover and middle shell, and facilitates disassembly and assembly, facilitating later maintenance and repair.

[0032] Moreover, the ceramic ejector pin is telescopically connected to the through hole of the spring base. The through hole guides the up and down movement of the ceramic ejector pin, providing a guarantee for the thermostat to achieve precise temperature control and ensure that the thermostat can accurately respond to temperature changes.

[0033] Specifically, the two ends of the middle shell are provided with connecting bosses 15, and the two sides of the base cover are provided with connecting grooves 16 that are interlocked with the connecting bosses.

[0034] In this embodiment, the connecting bosses at both ends of the middle shell and the connecting grooves on both sides of the base cover are interlocked with each other, and the connecting gap is engaged with the side wall of the base cover to limit and fix the base cover and the middle shell from multiple dimensions, further enhancing the stability of the overall structure, so that the temperature controller can operate more reliably in different working environments and reduce the risk of failure caused by loose components.

[0035] Specifically, a reed seat 17 is provided at the bottom of the ceramic bottom shell, and a plurality of positioning posts 18 are provided at one end of the reed seat 17. A positioning hole 19 is provided on one end of the reed to fit with the positioning posts.

[0036] In this embodiment, the positioning column provided at one end of the reed seat at the bottom of the ceramic bottom shell is fitted into the positioning hole at one end of the reed, which can accurately determine the installation position of the reed and ensure the position accuracy of the reed during the operation of the thermostat, so that the reed can reliably realize its electrical conduction or disconnection function, ensuring the accuracy and stability of the temperature control of the thermostat.

[0037] Specifically, the bottom of the reed seat has a "U"-shaped gap 20.

[0038] In this embodiment, the "U"-shaped gap at the bottom of the reed seat provides sufficient space for the reed to be pressed down.

[0039] Specifically, the return spring is a frustum structure that is smaller at the top and larger at the bottom.

[0040] In this embodiment, the return spring adopts a frustum structure with a small top and a large bottom. Compared with the traditional cylindrical spring, the frustum structure can provide a more uniform elastic force distribution during the compression and return process, effectively avoid stress concentration, and improve the service life and working reliability of the return spring.

[0041] Technical personnel please note: Although the utility model has been described according to the above specific implementation methods, the concept of the utility model is not limited to this utility model. Any modification using the concept of the utility model will be included in the scope of protection of this patent right.

Claims

1. An expansion thermostat, comprising a ceramic bottom shell, a base cover, a membrane box, an operating rod, a reed, a return spring, a ceramic ejector rod, and a spring base, characterized in that: It also includes a middle shell that is pressed and fixed between the ceramic bottom shell and the base cover, the spring base is integrally formed on the middle shell, and the ceramic ejector rod is telescopically connected to the through hole of the spring base; A connecting platform is integrally formed between the spring base and the middle shell, a left limiting step is provided on the upper end surface of the connecting platform, and a right limiting step is provided on the upper surface of the middle shell. A connecting gap is formed between the left limiting step and the right limiting step for the side wall of the base cover to be snapped into.

2. The expansion thermostat according to claim 1, characterized in that: The two ends of the middle shell are provided with connecting bosses, and the two sides of the base cover are provided with connecting grooves that are interlocked with the connecting bosses.

3. The expansion thermostat according to claim 1, characterized in that: A reed seat is provided at the bottom of the ceramic bottom shell, one end of the reed seat is provided with a plurality of positioning columns, and one end of the reed is provided with a positioning hole which is fitted with the positioning columns.

4. The expansion thermostat according to claim 3, characterized in that: The bottom of the reed seat is provided with a "U"-shaped gap.

5. The expansion thermostat according to claim 1, characterized in that: The return spring is a frustum structure that is smaller at the top and larger at the bottom.

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