Liquid expansion type automatic controller
By replacing traditional shrapnel in the liquid-swelling thermostat and using the elastic potential energy of the energy storage spring to control the work of the conductive bridge, the problem of large volume and short shrapnel life of the liquid-swelling thermostat is solved, and higher elasticity, life and temperature control accuracy are achieved.
Patent Information
- Application Number
- CN202510050859.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-13
- Publication Date
- 2025-04-22
AI Technical Summary
The existing liquid-swelling thermostats have problems such as large size, limited production and installation, low life of moving shrapnel and small elasticity.
The spring structure is used as the elastic characteristic, instead of the traditional shrapnel, the elastic potential energy top derives the conductive bridge through the energy storage spring, and the separation and disconnection of the conductive bridge and the lead electrode are achieved, thereby controlling the operation of the components.
It achieves reduced volume, reduced cost, multiple functions, strong performance, large elasticity, high service life, and high temperature control accuracy, solving the problem of low shrapnel force and easy fatigue.
Smart Images
Figure CN119864255A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of liquid expansion type automatic controllers, in particular to a liquid expansion type automatic controller. Background Art
[0002] The existing liquid expansion thermostat is a device that controls temperature by the expansion and contraction of liquid. It uses the principle of expansion and contraction of liquid under temperature changes and controls the temperature by controlling the change in liquid volume in the material. It is commonly used in small household appliances and air-conditioning systems.
[0003] The liquid expansion thermostat uses the lever principle and uses the dynamic spring to drive the switch on and off. It has the characteristics of accurate temperature control, long life, stability and reliability, small on-off temperature difference, large temperature control adjustment range, large load current and easy installation. However, the current liquid expansion thermostat still has the problems of large size, production and installation are subject to certain limitations, and the dynamic spring has a short life and small elastic force. Therefore, it is necessary to further improve and perfect the liquid expansion thermostat. Summary of the invention
[0004] The purpose of the present invention is to solve the above existing problems and provide a simple and reasonable structure of a hydraulic expansion automatic controller, the main function of which is to use the spring structure as the elastic force characteristic to replace the traditional spring sheet to solve the problem that the spring sheet has low force and is easy to fatigue.
[0005] A liquid expansion type automatic controller comprises a main body base with an assembly cavity therein, a membrane box is arranged in the assembly cavity, a capillary is connected to the membrane box, the capillary extends out of the main body base and is connected to a temperature sensing tube, a control component that forms a trigger cooperation with the membrane box is arranged in the assembly cavity, the control component comprises a pair of fixed lead-out electrodes and a movably arranged conductive bridge, the two ends of the conductive bridge are in sliding contact with the two lead-out electrodes respectively, a push rod adjacent to or abutting against the lower side of the membrane box is also slidably connected in the assembly cavity, an energy storage spring is abutted between the push rod and the conductive bridge, the push rod compresses the energy storage spring when it is pushed downward by the expansion of the membrane box, and when the relative positions of the two ends of the energy storage spring are changed, the conductive bridge is pushed upward by the elastic potential energy to separate the conductive bridge from the lead-out electrode and disconnect the control component.
[0006] The purpose of the present invention can also be solved by the following technical measures: As a more specific solution, an elastic buffer structure is also provided in the main body base, and the elastic buffer structure is pressed between the bottom surface of the push rod and the bottom of the assembly cavity along the sliding direction of the push rod; the elastic buffer structure includes a buffer spring.
[0007] As a further solution, a hollow cavity is opened in the push rod to form a limited sliding fit with the hollow cavity, the conductive bridge is inserted into the hollow cavity and is centered on the push rod, and inclined energy storage springs are abutted between the left and right sides of the push rod and the conductive bridge, and the conductive bridge is pushed upward by the two energy storage springs.
[0008] As a further solution, the conductive bridge is provided with an avoidance opening for avoiding the energy storage spring when changing its position, and a latch is provided on the side of the avoidance opening close to the end of the conductive bridge, one end of the energy storage spring is positioned on the latch, and convex points are provided on the left and right sides of the push rod, and the other end of the energy storage spring is positioned on the convex points.
[0009] As a further solution, the top of the main body base is threadedly connected to a temperature adjustment rod, a threaded through hole is provided in the temperature adjustment rod, the membrane box is provided with a convex rod that forms a linear sliding fit with the threaded through hole, a fine-tuning rod is threadedly connected in the threaded through hole, and the fine-tuning rod is abutted against the upper side of the convex rod.
[0010] As a further solution, a straight-line conductive bridge limit groove is provided at the bottom of the main body base, and the conductive bridge and the push rod are limited and slid in the conductive bridge limit groove. A guide rail structure is provided on the groove wall on the opposite side of the conductive bridge limit groove, and the push rod is provided with a guide rail matching part that forms a linear sliding match with the guide rail structure.
[0011] As a further solution, a spring positioning groove and a guide groove are provided at the bottom of the assembly cavity, a step surface is provided between the spring positioning groove and the guide groove, a guide column extending downward from the bottom of the push rod and slidingly cooperating with the guide groove, the buffer spring is sleeved outside the guide column and limited in the spring positioning groove, and its two ends respectively abut against the bottom surface of the push rod and the step surface.
[0012] As a further solution, the main body base is a box-shaped structure made of high-temperature resistant material, the box-shaped structure includes a box body and a box cover, and the box body and the box cover together define an assembly cavity; the conductive bridge limiting groove transversely penetrates a pair of side box walls of the box body and forms two openings, the lead-out electrode extends out of the main body base through the opening, the box cover is extended with a vertical plate matching the shape of the opening, and the lead-out electrode is pressed to the bottom of the opening by the vertical plate.
[0013] As a further solution, the top surface of the box cover is provided with a mounting bracket, and a plurality of upper through holes are opened on the mounting bracket, and the box cover and the box body are respectively provided with lower through holes and threaded deep holes corresponding to the upper through holes, and bolts are passed through the upper through holes, the lower through holes and the threaded deep holes in sequence to fasten the box cover to the upper side of the box body, and the mounting bracket is fastened to the top surface of the box cover.
[0014] As a further solution, each lead-out electrode includes a connecting terminal, one end of which extends out of the main body base, and the other end is inside the main body base and connected to a static contact. Moving contacts are respectively provided at both ends of the conductive bridge, and the two moving contacts synchronously contact or separate with the two static contacts.
[0015] The beneficial effects of the present invention are as follows: 1. This type of hydraulic expansion automatic controller can reduce the size, is simpler to process, can reduce costs, and has the advantages of multiple functions and strong performance.
[0016] Second, the structure uses the spring structure as the elastic characteristic, which has large elastic force, long service life, and high temperature control accuracy. It replaces the traditional spring sheet and solves the problems of small spring sheet force and easy fatigue.
[0017] 3. The main body base is made of high temperature resistant materials such as engineering plastics, which are fire retardant and have a small deformation coefficient. It can replace traditional ceramic materials. During the production process, it is easy to maintain dimensional consistency and is not easy to break or deform.
[0018] 4. The new structure adopts double contact contact and double contact separation to realize double power-off protection function.
[0019] 5. The mounting bracket is screwed together with the base of the main body, which makes the installation simple and reliable, and prevents the thermostat from loosening due to excessive force when plugging and unplugging. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic cross-sectional structure diagram of an embodiment of the present invention.
[0021] Figure 2 It is a schematic diagram of the cross-sectional structure of the automatic controller in the present invention (connection status of the control components).
[0022] Figure 3 It is a schematic diagram of the cross-sectional structure of the automatic controller in the present invention (control component disconnected state).
[0023] Figure 4 It is a schematic diagram of the matching structure of the push rod and the conductive bridge in the present invention.
[0024] Figure 5 It is a schematic diagram of the separate structures of the push rod and the conductive bridge in the present invention.
[0025] Figure 6 It is a schematic diagram of the assembly cavity structure in the present invention.
[0026] Figure 7 It is a schematic diagram of the decomposed structure of the automatic controller in the present invention. DETAILED DESCRIPTION
[0027] The present invention is further described below in conjunction with the accompanying drawings and embodiments.
[0028] refer to Figures 1 to 7 As shown, a liquid expansion type automatic controller comprises a main body base 1 with an assembly cavity 101 therein, a membrane box 2 is arranged in the assembly cavity 101, a capillary 3 is connected to the membrane box 2, and the capillary 3 extends out of the main body base 1 and is connected to a temperature sensing tube 4, a control component which forms a trigger cooperation with the membrane box 2 is arranged in the assembly cavity 101, the control component comprises a pair of fixed lead-out electrodes 5 and a movably arranged conductive bridge 6, the two ends of the conductive bridge 6 are respectively in sliding contact with the two lead-out electrodes 5, a push rod 7 adjacent to or abutting against the lower side of the membrane box 2 is also slidably connected in the assembly cavity 101, an energy storage spring 8 is abutted between the push rod 7 and the conductive bridge 6, the push rod 7 is pushed downward by the expansion of the membrane box 2 to compress the energy storage spring 8, and when the relative positions of the two ends of the energy storage spring 8 are changed, the conductive bridge 6 is pushed upward by the elastic potential energy to separate the conductive bridge 6 from the lead-out electrode 5 and disconnect the control component.
[0029] This type of hydraulic expansion automatic controller can reduce the size, is simpler to process, can reduce costs, and has the advantages of multiple functions and strong performance; the specific working principle is: When the temperature sensing tube 4 extends out of the base and detects the temperature change of the controlled object, the membrane box 2 expands with the temperature change, causing the push rod 7 to move downward, and the energy storage spring 8 in the automatic controller is compressed. When the contact end of the energy storage spring 8 and the push rod 7 is level or lower than the contact end of the energy storage spring 8 and the conductive bridge 6, the energy storage spring 8 releases the energy storage spring 8, thereby pushing the conductive bridge 6 upward to separate the conductive bridge 6 from the lead-out electrode 5, thereby disconnecting the control component (such as Figure 3 As shown in FIG. 1 ), when the membrane box 2 contracts, the push rod 7 returns to its original position, the energy storage spring 8 and the conductive bridge 6 perform opposite actions, and finally the conductive bridge 6 contacts the lead-out electrode 5 again, and the control component is reconnected (as shown in FIG. 1 ). Figure 2 as shown).
[0030] An elastic buffer structure is also provided in the main body base 1, and the elastic buffer structure is pressed between the bottom surface of the push rod 7 and the bottom of the assembly cavity 101 along the sliding direction of the push rod 7; when the push rod 7 moves downward, the elastic buffer structure is used to buffer the push rod 7 to prevent the push rod 7 from sliding too fast or too deep and colliding with the main body base 1, and it helps to reset the push rod 7 when the membrane box 2 contracts.
[0031] In this embodiment, the elastic buffer structure is a buffer spring 9 .
[0032] The push rod 7 is provided with a hollow cavity 701 which forms a limited sliding cooperation with the hollow cavity 701. The conductive bridge 6 is inserted into the hollow cavity 701 and is centered on the push rod 7. There are inclined energy storage springs 8 between the left and right sides of the push rod 7 and the conductive bridge 6. The conductive bridge 6 is pushed upward by the two energy storage springs 8. The conductive bridge 6 slides in the hollow cavity 701, which can limit the sliding of the conductive bridge 6 and take into account the guiding function. Moreover, the combination of the push rod 7 and the conductive bridge 6 makes the structure more compact, reduces the occupied space, and thus reduces the volume of the main body base 1.
[0033] The conductive bridge 6 is provided with an escape opening 601 for escaping the energy storage spring 8 when changing its position. A clamping ear 602 is provided on one side of the escape opening 601 close to the end of the conductive bridge 6. One end of the energy storage spring 8 is positioned on the clamping ear 602. The left and right sides of the push rod 7 are provided with convex points 71. The other end of the energy storage spring 8 is positioned on the convex point 71. When the energy storage spring 8 is compressed, the relative positions of the two ends of the energy storage spring 8 change simultaneously. Therefore, the avoidance opening 601 allows the conductive bridge 6 to cross the energy storage spring 8 and bounce upward, thereby ensuring the effect of the relative position change. In addition, the ear 602 and the protrusion 71 can locate the end of the energy storage spring 8, and the energy storage spring 8 will not jump out and shift when it is compressed.
[0034] In addition, in the present embodiment, a stop plate 72 is extended from the upper side of the hollow cavity 701, and the two protrusions 71 are integrally arranged on the left and right sides of the stop plate 72. In addition, a contact protrusion 73 is extended from the top surface of the push rod 7, and the contact protrusion 73 is in an arc-shaped structure. The contact protrusion 73 helps to push the membrane box 2 to the push rod 7 when it expands. A narrow groove 702 is formed between the stop plate 72 and the push rod 7. After the conductive bridge 6 is bounced upward, the narrow side of the conductive bridge 6 slides into the narrow groove 702, which can prevent the conductive bridge 6 from shaking left and right along the symmetry line.
[0035] The conductive bridge 6 is integrally stamped from a metal material and thus has the ability to conduct electricity. Upward-curved flanges 603 are provided on both sides of the conductive bridge 6 . The flanges 603 can increase the strength of the conductive bridge 6 and prevent it from being deformed when pushed by the energy storage spring 8 .
[0036] The top of the main body base 1 is threadedly connected with a temperature adjustment rod 10, and a threaded through hole 1001 is provided in the temperature adjustment rod 10. The membrane box 2 is provided with a convex rod 21 that forms a linear sliding fit with the threaded through hole 1001. The threaded through hole 1001 is threadedly connected with a fine-tuning rod 11, and the fine-tuning rod 11 is against the upper side of the convex rod 21. By rotating the temperature adjustment rod 10, the distance between the membrane box 2 and the push rod 7 can be controlled to achieve temperature control. When adjusting at the factory, the fine-tuning rod 11 can be turned to change the initial distance between the temperature adjustment rod 10 and the membrane box 2.
[0037] A straight conductive bridge limiting groove 102 is provided at the bottom of the main body base 1, and the conductive bridge 6 and the push rod 7 are limited and slide in the conductive bridge limiting groove 102. A guide rail structure is provided on the groove wall on the opposite side of the conductive bridge limiting groove 102, and the push rod 7 is provided with a guide rail matching part that forms a linear sliding match with the guide rail structure; the conductive bridge limiting groove 102 can limit the conductive bridge 6 from swinging left and right or rotating when a force is applied.
[0038] In this embodiment, the guide rail structure is a push rod limiting groove 103 that matches the shape of the push rod 7. The main part of the push rod 7 is a square column structure, and its main part constitutes the guide rail matching part. The main part of the push rod 7 cooperates with the push rod limiting groove 103 to ensure that the push rod 7 slides axially and also prevents the push rod 7 from swinging left and right or rotating when a force is applied.
[0039] A spring positioning groove 104 and a guide groove 105 are provided at the bottom of the assembly cavity 101, and a step surface 106 is provided between the spring positioning groove 104 and the guide groove 105. A guide column 74 slidably matched with the guide groove 105 extends downward from the bottom of the push rod 7. The buffer spring 9 is sleeved outside the guide column 74 and limited in the spring positioning groove 104, and its two ends are respectively against the bottom surface of the push rod 7 and the step surface 106; the cooperation between the guide column 74 and the guide groove 105 can prevent the bottom end of the push rod 7 from swinging left and right, and can support the buffer spring 9.
[0040] The main body base 1 is a box-shaped structure made of high-temperature resistant material, and the box-shaped structure includes a box body 12 and a box cover 13. The box body 12 and the box cover 13 define an assembly cavity 101; the conductive bridge limit groove 102 transversely penetrates a pair of side box walls of the box body 12 to form two openings 107, and the lead-out electrode 5 extends out of the main body base 1 through the opening 107. The box cover 13 is extended with a vertical plate 131 matching the shape of the opening 107, and the lead-out electrode 5 is pressed and fixed to the bottom of the opening 107 by the vertical plate 131; the main body base 1 is made of high-temperature resistant materials such as engineering plastics, which are fire-resistant and flame-retardant, have a small deformation coefficient, and replace traditional ceramic materials. During the production process, it is easy to maintain dimensional consistency, is not easy to be damaged and deformed, and the lead-out electrode 5 is fixed by the connection of the box cover 13, which is simple to install.
[0041] In addition, a recess 108 is provided on the side of one of the vertical plates 131, and the recess 108 cooperates with the opening 107 to form a through-hole 109. The capillary 3 extends out of the main body base 1 through the through-hole 109. When the membrane box 2 is installed into the inner cavity of the box body 12, the capillary 3 can be led out by utilizing the open recess 108, so that the membrane box 2, the capillary 3 and the temperature sensing tube 4 can be connected and assembled and then assembled into the box body 12, and the position of the capillary 3 can be fixed by utilizing the installed box cover 13.
[0042] A mounting bracket 14 is provided on the top surface of the box cover 13, and a plurality of upper through holes 141 are opened on the mounting bracket 14. The box cover 13 and the box body 12 are respectively provided with lower through holes 132 and threaded deep holes 121 corresponding to the upper through holes 141. Bolts 16 pass through the upper through holes 141, the lower through holes 132 and the threaded deep holes 121 in sequence, so that the box cover 13 is fastened to the upper side of the box body 12, and the mounting bracket 14 is fastened to the top surface of the box cover 13; the mounting bracket 14 is screw-locked with the main body base 1, and the installation is simple and reliable, which prevents the thermostat from being loosened due to excessive plugging and unplugging force during use.
[0043] The mounting bracket 14 is a cross-shaped structure, and a cross groove 133 is provided on the top surface of the box cover 13. The cross-shaped structure is in the cross groove 133, and an upper through hole 141 is provided on one pair of side ends of the cross-shaped structure; the other pair of side ends of the cross-shaped structure are formed by continuous bending to form an upward-turned connecting ear 142, and a connecting assembly through hole 143 for installing an automatic controller is provided on the connecting ear 142.
[0044] A cover hole is provided in the center of the cross groove 133 , and the mounting bracket 14 is provided with an internal threaded sleeve 144 extending into the cover hole. The temperature adjustment rod 10 is provided with an external threaded portion 1002 , and is connected to the mounting bracket 14 through the external threaded portion 1002 and the internal threaded sleeve 144 .
[0045] Moreover, the outer side of the temperature adjustment rod 10 is connected to a limit pendulum block 1003 which rotates with it. The mounting bracket 14 is provided with a limit baffle 145 which is folded upward by stamping. The limit baffle 145 can limit the rotation angle of the temperature adjustment rod 10 to prevent the temperature adjustment rod 10 from going out or in too much.
[0046] Each lead-out electrode 5 includes a connecting terminal 51, one end of which extends out of the main body base 1, and in the present embodiment, one end of the connecting terminal 51 is bent downward to facilitate subsequent wiring; the other end is inside the main body base 1 and connected to a stationary contact 52, and moving contacts 61 are respectively provided at both ends of the conductive bridge 6, and the two moving contacts 61 are synchronously in contact with or separated from the two stationary contacts 52; the structure adopts double-contact contact and double-contact separation to realize a double power-off protection function.
[0047] During installation, a first connection hole 511 is opened at the other end of the connection terminal 51, and a second connection hole 110 is opened at the bottom of the main body base 1 corresponding to the first connection hole 511. The connection terminal 51 is riveted into the main body base 1 by passing the rivet 15 through the first connection hole 511 and the second connection hole 110.
[0048] The above is a preferred embodiment of the present invention, which shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. The present invention may have various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention to be protected, and the scope of the present invention to be protected is defined by the attached claims and their equivalents.
Claims
1. A liquid expansion automatic controller, comprising a main body base with an assembly cavity, a membrane box is arranged in the assembly cavity, a capillary is connected to the membrane box, and the capillary extends out of the main body base and is connected to a temperature sensing tube, and a control component is arranged in the assembly cavity to form a triggering cooperation with the membrane box, characterized in that: The control component includes a pair of fixed lead-out electrodes and a movably arranged conductive bridge, the two ends of the conductive bridge are in sliding contact with the two lead-out electrodes respectively, and a push rod adjacent to or against the lower side of the membrane box is also slidably connected in the assembly cavity, and an energy storage spring is abutted between the push rod and the conductive bridge. When the push rod is pushed downward by the expansion drum of the membrane box, the energy storage spring is compressed, and when the relative positions of the two ends of the energy storage spring are changed, the conductive bridge is pushed upward by the elastic potential energy to separate the conductive bridge from the lead-out electrode and disconnect the control component.
2. A hydraulic expansion automatic controller according to claim 1, characterized in that: An elastic buffer structure is also arranged in the main body base, and the elastic buffer structure is pressed between the bottom surface of the push rod and the bottom of the assembly cavity along the sliding direction of the push rod; the elastic buffer structure includes a buffer spring.
3. A hydraulic expansion automatic controller according to claim 1, characterized in that: A hollow cavity is provided in the push rod to form a limited sliding fit with the hollow cavity. The conductive bridge is inserted into the hollow cavity and is centered on the push rod. An inclined energy storage spring is abutted between the left and right sides of the push rod and the conductive bridge. The conductive bridge is translated upward and bounced up by the two energy storage springs.
4. A hydraulic expansion automatic controller according to claim 3, characterized in that: The conductive bridge is provided with an avoidance opening for avoiding the energy storage spring when changing its position, and a clamp is provided on the side of the avoidance opening close to the end of the conductive bridge, one end of the energy storage spring is positioned on the clamp, and convex points are provided on the left and right sides of the push rod, and the other end of the energy storage spring is positioned on the convex points.
5. The hydraulic expansion automatic controller according to claim 1, characterized in that: The top of the main body base is threadedly connected with a temperature regulating rod, a threaded through hole is arranged in the temperature regulating rod, the membrane box is provided with a convex rod which forms a linear sliding fit with the threaded through hole, a fine-tuning rod is threadedly connected in the threaded through hole, and the fine-tuning rod abuts against the upper side of the convex rod.
6. A hydraulic expansion automatic controller according to claim 3, characterized in that: A straight conductive bridge limit groove is provided at the bottom of the main body base, and the conductive bridge and the push rod are limited and slid in the conductive bridge limit groove. A guide rail structure is provided on the groove wall on the opposite side of the conductive bridge limit groove, and the push rod is provided with a guide rail matching part that forms a linear sliding match with the guide rail structure.
7. The hydraulic expansion automatic controller according to claim 2, characterized in that: A spring positioning groove and a guide groove are provided at the bottom of the assembly cavity, a step surface is provided between the spring positioning groove and the guide groove, a guide column extending downward from the bottom of the push rod and slidingly cooperating with the guide groove, the buffer spring is sleeved outside the guide column and limited in the spring positioning groove, and its two ends are respectively against the bottom surface of the push rod and the step surface.
8. The hydraulic expansion automatic controller according to claim 6, characterized in that: The main body base is a box-shaped structure made of high-temperature resistant material, and the box-shaped structure includes a box body and a box cover, and the box body and the box cover together define an assembly cavity; the conductive bridge limiting groove transversely penetrates a pair of side box walls of the box body and forms two openings, and the lead-out electrode extends out of the main body base through the opening, and the box cover is extended with a vertical plate matching the shape of the opening, and the lead-out electrode is pressed and fixed to the bottom of the opening by the vertical plate.
9. A hydraulic expansion automatic controller according to claim 8, characterized in that: The top surface of the box cover is provided with a mounting bracket, and a plurality of upper through holes are opened on the mounting bracket. The box cover and the box body are respectively provided with lower through holes and threaded deep holes corresponding to the upper through holes. Bolts are passed through the upper through holes, the lower through holes and the threaded deep holes in sequence to fasten the box cover to the upper side of the box body. The mounting bracket is fastened to the top surface of the box cover.
10. A hydraulic expansion automatic controller according to claim 1 or 3, characterized in that: Each lead-out electrode includes a connecting terminal, one end of which extends out of the main body base, and the other end is inside the main body base and connected to a static contact. The two ends of the conductive bridge are respectively provided with moving contacts, and the two moving contacts synchronously contact or separate with the two static contacts.