A compact liquid-expansion temperature controller

Abstract

The utility model relates to a compact liquid expansion type temperature controller, including support fixed frame, be provided with the diaphragm box in support fixed frame, the diaphragm box is connected with temperature sensing cylinder through capillary, just the lower side assembly connection of support fixed frame has with diaphragm box coaxial arrangement's jump module, be equipped with conducting wire on jump module, the touch switch is connected in series on conducting wire, there is movable push rod between the touch switch and diaphragm box and abuts or is adjacent, just the touch switch and movable push rod all are located in the orthographic projection range below diaphragm box, this liquid expansion type temperature controller whole touch switch part is placed in the orthographic projection range below diaphragm box, makes the shell of assembly touch switch can reduce volume, makes the radial width of liquid expansion type temperature controller reduce, whole temperature controller keeps compact structure, saves packing space, reduces transportation cost.

Description

Technical Field

[0001] This utility model relates to the field of liquid expansion thermostats, specifically a compact liquid expansion thermostat. Background Technology

[0002] The current structure of a liquid expansion thermostat is shown in Chinese patent document, application number 202320450436.5, which discloses a low-cost liquid expansion thermostat including a BMC base, a liquid temperature sensing element, a diaphragm, a push rod device, a first terminal, a second terminal, a reed seat, a moving contact, a stationary contact, and a fine-tuning mechanism. The moving contact is disposed within the BMC base and connected to the reed seat, and the stationary contact is disposed within the BMC base. (See attached drawings.) Figure 3 As can be seen, the stationary and moving contacts are arranged laterally within the BMC base. This structure increases the volume of the BMC base and causes the lower half of the BMC base to have a larger longitudinal and / or transverse dimension than the upper half. This increases the space requirements for the liquid expansion thermostat and reduces its applicability. Therefore, the applicant has made improvements and refinements to the liquid expansion thermostat to solve the above problems and provide it for consumers to choose from. Utility Model Content

[0003] The purpose of this invention is to solve the above-mentioned existing problems and provide a compact liquid expansion temperature controller with a simple and reasonable structure.

[0004] A compact liquid expansion thermostat includes a support frame with a diaphragm box inside. The diaphragm box is led outward through a capillary tube and connected to a temperature sensing cylinder. A snap-action module coaxially arranged with the diaphragm box is mounted on the lower side of the support frame. The snap-action module has a conductive line, and a touch switch is connected in series on the conductive line. A movable push rod is abutted against or adjacent to the touch switch and the diaphragm box, and both the touch switch and the movable push rod are located within the orthographic projection range below the diaphragm box.

[0005] The objective of this utility model can also be achieved by the following technical measures: As a more specific embodiment, the jump module includes a circular outer shell, the touch switch is disposed in the inner cavity of the circular outer shell, and the circular outer shell is located within the orthographic projection range below the diaphragm box.

[0006] As a further embodiment, the touch switch includes a movable contact and a stationary contact with elastic contact. The movable contact piece includes a movable contact fixed piece and a movable contact movable piece integrally bent above the movable contact fixed piece. The end of the movable contact movable piece is provided with a movable contact point, and the movable contact movable piece is provided with a protruding contact point corresponding to the position of the movable push rod. The stationary contact piece is arranged on the upper side of the movable contact movable piece, one end of the stationary contact piece is provided with a stationary contact that contacts the movable contact, and an avoidance cavity is provided on the stationary contact piece corresponding to the movable push rod.

[0007] As a further solution, the conductive circuit further includes a pair of connecting inserting pieces, one end of each of the two connecting inserting pieces is arranged in the circular casing and is electrically connected with the movable contact fixing piece or the stationary contact piece through a rivet, and the other end of each of the two connecting inserting pieces extends out of the circular casing and extends downward in a vertical direction.

[0008] As a further solution, the top of the circular casing is provided with a guide cover, a metal sealing cover for packaging the guide cover, and an actuating steel sheet limited between the metal sealing cover and the guide cover, the guide cover is provided with a guide hole slidably fitted with the movable push rod, the movable push rod abuts between the actuating steel sheet and the touch switch, the actuating steel sheet is in a circular curved surface structure, and the metal sealing cover is provided with an avoidance opening corresponding to the central position of the actuating steel sheet.

[0009] As a further solution, the bottom surface of the membrane box is provided with a membrane box shank, an energy storage spring that is narrow at the upper part and wide at the lower part is sleeved on the membrane box shank, and the energy storage spring abuts against the central position of the actuating steel sheet.

[0010] As a further solution, the supporting and fixing frame is in a door-shaped structure, which comprises a supporting top plate and supporting side plates connected to the left and right sides of the supporting top plate, the width of the supporting side plates is the same as that of the supporting top plate, the bottom end of each supporting side plate is provided with a lower mounting lug formed by outward folding, and the snap-action module is connected with the lower mounting lug.

[0011] As a further solution, a first connecting hole is opened on the lower mounting lug; a pair of connecting lugs is arranged on the snap-action module, a second connecting hole is arranged on the connecting lug corresponding to the first connecting hole, and a fastening unit sequentially passes through the second connecting hole and the first connecting hole, so that the snap-action module is connected to the supporting and fixing frame.

[0012] As a further solution, the outward edges of the movable contact movable piece and the stationary contact piece are arc surfaces, and the arc surfaces of the movable contact movable piece and the stationary contact piece match or fit on the inner wall surface of the circular casing.

[0013] As a further solution, the diameter of the membrane box is R, and R≤18mm.

[0014] The beneficial effects of the present utility model are as follows: The utility model relates to a compact liquid expansion temperature controller. In the liquid expansion temperature controller, the touch switch part is integrally arranged within the orthographic projection range on the lower side of the membrane box, so that the volume of the casing for assembling the touch switch can be reduced, the radial width of the liquid expansion temperature controller is decreased, the whole temperature controller keeps a compact structure, the packaging space is saved, and the transportation cost is reduced; Furthermore, instead of using temperature deformation to disconnect the conductive circuit, the temperature sensing cylinder is installed on the heating element to sense the temperature. The liquid expansion of the diaphragm is transmitted to the agitator steel sheet, causing it to deform. This allows the liquid expansion thermostat to be installed in a location far from the heat source, which helps to reduce the volume of the heating area and makes the product design more flexible. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the liquid expansion type temperature controller in this utility model.

[0016] Figure 2 This is a schematic diagram of the orthographic projection of the membrane box and the jump module in this utility model.

[0017] Figure 3 This is a schematic diagram of the touch switch and connecting insert structure in this utility model.

[0018] Figure 4 This is an exploded structural diagram of the liquid expansion type temperature controller in this utility model.

[0019] Figure 5 This is a top view of the support and fixing frame structure in this utility model. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] See Figures 1 to 5 As shown, a compact liquid expansion thermostat includes a support frame 1, a diaphragm box 2 is disposed inside the support frame 1, the diaphragm box 2 is led outward through a capillary tube 3 and connected to a temperature sensing cylinder 4, and a snap-action module 5 coaxially disposed with the diaphragm box is assembled and connected to the lower side of the support frame 1, the snap-action module 5 is provided with a conductive line, a touch switch 6 is connected in series on the conductive line, the touch switch 6 is abutted against or adjacent to the diaphragm box 2 and the touch switch 6 and the touch switch 6 and the touch switch 6 and the touch switch 6 and the touch switch 6 and the touch switch 7 are both located within the orthographic projection range X below the diaphragm box 2.

[0022] This liquid expansion thermostat places the entire touch switch 6 within the projected area of ​​the diaphragm box 2, which reduces the size of the housing containing the touch switch 6 and decreases the radial width of the liquid expansion thermostat. This keeps the entire thermostat compact, saves packaging space, and reduces transportation costs.

[0023] The snap-start module 5 includes a circular outer shell 51, and the touch switch 6 is disposed in the inner cavity of the circular outer shell 51. In this embodiment, the circular outer shell 51 is further located within the orthographic projection range X below the diaphragm box 2; thus, the structure of the snap-start module 5 is more compact and smaller in size, so that the support and fixing frame 1 can protect the snap-start module 5 and reduce the impact of the snap-start module 5.

[0024] The touch switch 6 includes a movable contact 61 and a stationary contact 62 that have elastic contact. The movable contact piece 61 includes a movable contact fixed piece 611 and a movable contact movable piece 612 integrally bent above the movable contact fixed piece 611. The movable contact movable piece 612 has a movable contact point 613 at its end and a protruding contact point 614 at the position corresponding to the movable push rod 7. By arranging the fixed part and the elastic part of the movable contact piece 61 in the upper and lower layers respectively, the lateral length of the movable contact piece 61 can be reduced while achieving the elastic effect, thus making it more suitable for the compact circular shell 51. The stationary contact piece 62 is disposed on the upper side of the movable contact piece 612. One end of the stationary contact piece 62 is provided with a stationary contact point 621 that contacts the movable contact point 613. The stationary contact piece 62 is provided with a clearance cavity 622 corresponding to the movable push rod 7. The stationary contact piece 62 is fixed on the upper side of the movable contact piece 612 and is offset, so that there is enough space on the lower side of the stationary contact piece 62 for the movable contact piece 612 to move. The clearance cavity 622 allows the movable push rod 7 to pass through the stationary contact piece 62 and abut against the movable contact point 613 of the movable contact piece 612.

[0025] The conductive circuit also includes a pair of connecting tabs 52. One end of the two connecting tabs 52 is placed inside the circular housing 51 and electrically connected to the moving contact fixing piece 611 or the stationary contact piece 62 by a rivet 53. The other end of the two connecting tabs 52 extends out of the circular housing 51 and extends downward in the vertical direction. The connecting tabs 52 are used to connect wires. The downwardly extending connecting tabs 52 do not occupy the lateral space of the jump module 5, so that the liquid expansion thermostat maintains a narrow body structure.

[0026] The top of the circular outer shell 51 is provided with a guide cover 54, a metal cover 55 for sealing the guide cover 54, and a bulging steel sheet 56 limited between the metal cover 55 and the guide cover 54. The guide cover 54 is provided with a guide hole 541 that slides with the movable push rod 7. The movable push rod 7 abuts between the bulging steel sheet 56 and the touch switch 6. The bulging steel sheet 56 has a circular curved surface structure, and the metal cover 55 is provided with an avoidance opening 551 at the center position of the bulging steel sheet 56. Based on the above structure, the snap-action module 5 is similar to the snap-action thermostat structure, except that the agitating steel sheet 56 only serves to withstand pressure and will not deform due to temperature rise.

[0027] The bottom surface of the diaphragm box 2 is provided with a diaphragm box handle 21, and an energy storage spring 8, which is narrow at the top and wide at the bottom, is sleeved on the diaphragm box handle 21. The energy storage spring 8 abuts against the center position of the agitating steel sheet 56. When the capsule 2 expands, the energy storage spring 8 is first pressed against the central position on the surface of the pulse-driven steel sheet 56 in the early stage. When both ends are constrained, the energy storage spring 8 starts to store elastic potential energy. When the elastic potential energy is stored to a certain value, the pulse-driven steel sheet 56 is deformed downward instantly under the force, so that the movable push rod 7 can be quickly pushed to press against the movable contact movable sheet 612, so that the movable contact 613 is separated from the stationary contact 621 and the conductive circuit is disconnected. The rapid separation of the movable contact 613 and the stationary contact 621 can avoid electric arcing between them, and can greatly improve the service life of the touch switch 6.

[0028] The support fixing frame 1 is in a "冂"-shaped structure, which comprises a support top plate 11 and support side plates 12 connected to the left and right sides of the support top plate 11. The width of the support side plates 12 is the same as that of the support top plate 11, and the bottom end of the support side plate 12 is provided with a lower mounting lug 13 formed by outward folding. The snap-action module 5 is connected to the lower mounting lug 13. The support fixing frame 1 of this structure can reduce the width of the support fixing frame 1, save sheet metal materials, make the main body of the liquid expansion thermostat narrower, allow the whole liquid expansion thermostat to maintain a compact structure, and reduce the occupation of installation space.

[0029] In addition, a temperature adjusting rod 9 coaxially arranged with the capsule 2 is threadedly connected to the support top plate 11, and the temperature adjusting rod 9 is connected to the top surface of the capsule 2, so that the capsule 2 is fixed in the support fixing frame 1; by rotating the temperature adjusting rod 9, the position of the capsule 2 is changed, thereby adjusting the corresponding temperature when the touch switch 6 actuates.

[0030] A first connecting hole 131 is opened on the lower mounting lug 13; a pair of connecting lugs 57 are provided on the snap-action module 5. In this embodiment, the connecting lugs 57 are integrally formed on the left and right sides of the metal sealing cover 55, and the connecting lugs 57 are provided with second connecting holes 571 corresponding to the first connecting holes 131. Fastening units 10 such as screws sequentially pass through the second connecting holes 571 and the first connecting holes 131 from bottom to top, so that the snap-action module 5 is connected to the support fixing frame 1.

[0031] An upper mounting lug 74 formed by outward bending is provided on the opposite side of the top of the support fixing frame 1, and a third connecting hole 741 for connecting the liquid expansion thermostat to the mounting surface is opened on the upper mounting lug 74; the entire liquid expansion thermostat is mounted on the mounting surface through the upper mounting lug 74, which has simple operation and convenient and quick assembly.

[0032] The lower mounting lug 13 and the upper mounting lug 74 are oppositely arranged along the vertical direction, the third connecting hole 741 is arranged on the outer side relative to the first connecting hole 131, and the third connecting hole 741 and the first connecting hole 131 are arranged on the same vertical plane X, so that the connection points of the liquid expansion thermostat are arranged at symmetrical positions, and the installation is more stable; This support bracket 1 arranges the lower mounting ears 13 and the upper mounting ears 74 on the left and right sides, which can make full use of the lateral space of the support bracket 1 and reduce the longitudinal area of ​​the support bracket 1. This allows the liquid expansion thermostat to maintain a compact structure, facilitates the installation of the liquid expansion thermostat, and reduces the requirements for installation space.

[0033] The outward-facing edges of the movable contact piece 612 and the stationary contact piece 62 are arc-shaped surfaces 63. The arc-shaped surfaces 63 of the movable contact piece 612 and the stationary contact piece 62 match or fit against the inner wall surface of the circular outer shell 51. Due to the constraints of the compact circular outer shell 51, making the edges of the movable contact piece 612 and the stationary contact piece 62 arc-shaped allows the movable contact piece 612 and the stationary contact piece 62 to fit more tightly against the inner wall surface of the circular outer shell 51, thereby freeing up more installation space and movement space.

[0034] In this embodiment, since the connection between the membrane box 2 and the capillary tube 3 and the edge flange of the membrane box 2 are arranged on opposite sides, it is possible to avoid burning through the edge flange of the membrane box 2 when welding the capillary tube 3, thereby further reducing the size of the membrane box 2, wherein the diameter of the membrane box 2 is R, and preferably 12mm≤R≤17mm.

[0035] The above describes the preferred embodiments of this utility model, illustrating and describing its basic principles, main features, and advantages. 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 protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A compact liquid-expansion thermostat, comprising a support frame, a diaphragm box disposed within the support frame, the diaphragm box being led outwards through a capillary tube and connected to a temperature sensing cylinder, and a snap-fit ​​module coaxially arranged with the diaphragm box being mounted and connected to the lower side of the support frame, the snap-fit ​​module being provided with conductive lines, characterized in that: A touch switch is connected in series on the conductive line, a movable push rod is abutted or adjacent between the touch switch and the membrane box, and both the touch switch and the movable push rod are located within the orthographic projection range below the membrane box.

2. A compact liquid expansion temperature controller according to claim 1, characterized in that: The snap-action module comprises a circular outer shell, the touch switch is arranged in an inner cavity of the circular outer shell, and the circular outer shell is located within the orthographic projection range below the membrane box.

3. A compact liquid expansion temperature controller according to claim 2, characterized in that: The touch switch comprises a movable contact piece and a stationary contact piece which are in elastic contact; The movable contact piece comprises a movable contact fixing piece and a movable contact movable piece integrally bent above the movable contact fixing piece, a movable contact is arranged at the tail end of the movable contact movable piece, and a convex contact is arranged at the position of the movable contact movable piece corresponding to the movable push rod; The stationary contact piece is arranged on the upper side of the movable contact movable piece, one end of the stationary contact piece is provided with a stationary contact contacting the movable contact, and the stationary contact piece is provided with an avoiding cavity corresponding to the movable push rod.

4. A compact liquid expansion temperature controller according to claim 3, characterized in that: The conductive line further comprises a pair of connecting inserting pieces, one end of each of the two connecting inserting pieces is arranged in the circular outer shell and is electrically connected with the movable contact fixing piece or the stationary contact piece through a rivet, and the other end of each of the two connecting inserting pieces extends out of the circular outer shell and extends downward in a vertical direction.

5. A compact liquid expansion temperature controller according to claim 2, characterized in that: The top of the circular outer shell is provided with a guide cover, a metal sealing cover for packaging the guide cover, and an actuating steel plate limited between the metal sealing cover and the guide cover, the guide cover is provided with a guide hole in sliding fit with the movable push rod, the movable push rod is abutted between the actuating steel plate and the touch switch, the actuating steel plate is of a circular curved surface structure, and the metal sealing cover is provided with an avoiding opening corresponding to the center position of the actuating steel plate.

6. A compact liquid expansion temperature controller according to claim 5, characterized in that: The bottom surface of the membrane box is provided with a membrane box handle, an energy storage spring with a narrow upper part and a wide lower part is sleeved on the membrane box handle, and the energy storage spring is abutted against the center position of the actuating steel plate.

7. A compact liquid expansion temperature controller according to claim 1, characterized in that: The supporting and fixing frame is in a door-shaped structure, and comprises a supporting top plate and supporting side plates connected to the left and right sides of the supporting top plate, the width of the supporting side plates is the same as that of the supporting top plate, the bottom end of each supporting side plate is provided with a lower mounting ear formed by outward folding, and the snap-action module is connected with the lower mounting ears.

8. A compact liquid expansion temperature controller according to claim 7, characterized in that: A first connecting hole is formed in the lower mounting ear; a pair of connecting lugs is arranged on the snap-action module, a second connecting hole is formed in the connecting lug corresponding to the first connecting hole, and a fastening unit sequentially passes through the second connecting hole and the first connecting hole, so that the snap-action module is connected to the supporting and fixing frame.

9. A compact liquid expansion temperature controller according to claim 3, characterized in that: The outward edges of the movable contact movable piece and the stationary contact piece are arc surfaces, and the arc surfaces of the movable contact movable piece and the stationary contact piece match or fit on the inner wall surface of the circular outer shell.

10. A compact liquid expansion temperature controller according to claim 1, characterized in that: The diameter of the membrane box is R, and R≤18mm.

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