Liquid expansion type manual and automatic integrated controller

Abstract

The utility model relates to a liquid expansion type manual and automatic integrated controller which comprises a body base, a diaphragm capsule is arranged in an assembly cavity, a capillary tube is connected to the diaphragm capsule, the capillary tube extends out of the body base and is connected with a temperature sensing cylinder, and a controller structure which is in trigger fit with the diaphragm capsule is arranged in the assembly cavity. The controller structure comprises an automatic controller and an overtemperature protector which are connected in series on the conductive circuit; the automatic controller comprises a first moving contact assembly and a first static contact assembly which are in contact fit with each other. The overtemperature protector comprises a second moving contact assembly and a second static contact assembly which are in contact fit with each other. A push rod which is adjacent to or abuts against the lower side of the diaphragm capsule is further connected into the assembly cavity in a sliding mode, when the push rod is pushed by the diaphragm capsule expansion drum to move downwards, the push rod is sequentially matched with the first movable contact assembly and the second movable contact assembly in a pressing contact mode at different positions, and a manual reset device is further arranged on the second movable contact assembly. The controller is additionally provided with an overtemperature protection structure, so that an overtemperature protection function can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of liquid expansion type automatic controller, specifically a liquid expansion type hand self integrated controller. BACKGROUND

[0002] The existing liquid expansion type temperature controller is a device for controlling temperature by expansion and contraction of liquid, which uses the expansion and contraction principle of liquid under temperature change to realize temperature control by controlling the volume change of liquid in the material, and is commonly used in small household appliances and air conditioning systems.

[0003] The liquid expansion type temperature controller uses the lever principle to drive the on-off action of the switch by the moving sheet, and has the characteristics of accurate temperature control, long service life, stability and reliability, small temperature difference between start and stop, large temperature control adjustment range, large load current and convenient installation. However, the current liquid expansion type temperature controller still has only single temperature control function and does not have over-temperature protection function, so it needs to be further improved and perfected. UTILITY MODEL CONTENTS

[0004] The utility model aims at solving the above-mentioned problems, and provides a liquid expansion type hand self integrated controller with simple and reasonable structure, which mainly serves to increase an over-temperature protection structure to realize over-temperature protection function, and the over-temperature protection structure can realize manual reset.

[0005] A liquid expansion type hand self integrated controller, comprising a body base with an assembly cavity, a diaphragm box is arranged in the assembly cavity, a capillary tube is connected to the diaphragm box, the capillary tube extends out of the body base and is connected with a temperature sensing cylinder, a controller structure is arranged in the assembly cavity and cooperates with the diaphragm box, the controller structure comprises an automatic controller and an over-temperature protector connected in series on a conductive circuit, the automatic controller comprises a first moving contact assembly and a first stationary contact assembly in contact with each other, the over-temperature protector comprises a second moving contact assembly and a second stationary contact assembly in contact with each other, a push rod is slidably connected in the assembly cavity and abuts or abuts against the diaphragm box on the lower side, when the push rod moves downward under the expansion of the diaphragm box, the push rod is in pressure contact with the first moving contact assembly and the second moving contact assembly in different positions in sequence, and a manual reset device is arranged on the second moving contact assembly.

[0006] The purpose of the utility model can also be solved by the following technical measures:

[0007] As a more specific scheme, a rotation limiting structure is arranged between the top of the push rod and the diaphragm box for limiting the rotation of the push rod, a first touch head in pressure contact with the first moving contact assembly is arranged at one end of the bottom of the push rod, and an adjusting bolt is screwed at the other end of the bottom of the push rod, and the bottom of the adjusting bolt constitutes a second touch head in pressure contact with the second moving contact assembly.

[0008] As a further solution, the first and second moving contact assemblies are arranged in parallel with each other in the assembly cavity, the fixed end and the movable end of the first and second moving contact assemblies are on the same side, the second stationary contact assembly is connected between the fixed end of the first moving contact assembly and the movable end of the second moving contact assembly, and the distance between the second moving contact assembly and the second contact pressure head is greater than the distance between the first moving contact assembly and the first contact pressure head.

[0009] As a further solution, the second moving contact assembly comprises a second fixed seat, a second spring sheet and an energy storage spring sheet, the second fixed seat is fixed on the body base by a first bolt, the fixed end of the second spring sheet is connected to the second fixed seat, and the second spring sheet is cut into a second top sheet towards the fixed end, the second top sheet is provided with a second power-assisted curved portion for pressure contact with the first contact pressure head, and the energy storage spring sheet is pressure-welded between the curved end of the second top sheet and the movable end of the second spring sheet, and the movable end of the second spring sheet is further connected to a second moving contact head.

[0010] As a further solution, the energy storage spring sheet comprises a spring sheet body in the shape of a "door", the two ends of the spring sheet body are respectively bent to form a first bent spring sheet and a second bent spring sheet, the first bent spring sheet is abutted against the bottom surface of the second spring sheet, and the junctions between the first bent spring sheet, the second bent spring sheet and the spring sheet body are provided with positioning openings, and the curved end of the second top sheet and the movable end of the second spring sheet are provided with positioning end sheets matched with the positioning openings.

[0011] As a further solution, the first moving contact assembly comprises a first fixed seat and a first spring sheet, the first fixed seat is fixed on the body base by a first rivet, the fixed end of the first spring sheet is connected to the first fixed seat, the first spring sheet is provided with a first power-assisted curved portion for pressure contact with the first contact pressure head, and the first spring sheet is cut into a first top sheet towards the movable end, the end of the first fixed seat is bent to form a groove plate, the curved end of the first top sheet is positioned in a lateral vertebra groove on the groove plate, and the movable end of the first spring sheet is further connected to a first moving contact head.

[0012] As a further solution, the second stationary contact assembly comprises a second stationary contact sheet arranged on the lower side of the second moving contact assembly, one end of the second stationary contact sheet is provided with a second stationary contact point for contact with the movable end of the second moving contact assembly, and the other end of the second stationary contact sheet is fixed on the body base by a first rivet and electrically connected to the first moving contact assembly.

[0013] As a further solution, the outer bottom surface of the body base is provided with a mounting groove matching the shape of the second stationary contact sheet, the second stationary contact sheet is embedded in the mounting groove and is isolated from the automatic controller and the over-temperature protector, and an insulating plate is also packaged in the mounting groove and arranged on the bottom surface of the second stationary contact sheet.

[0014] As a further scheme, the manual reset device comprises a manual push rod, which is slidingly connected in a guide hole of the body base, and one end of the manual push rod is exposed outside the body base, and the other end is arranged in abutment or close to the movable end of the second movable contact assembly.

[0015] As a further scheme, the top of the body base is threadedly connected with a temperature adjusting rod, the temperature adjusting rod is provided with a threaded through hole, the diaphragm box is provided with a protruding rod in linear sliding cooperation with the threaded through hole, a fine adjusting rod is threadedly connected in the threaded through hole, and the fine adjusting rod is in abutment on the upper side of the protruding rod.

[0016] The utility model discloses the beneficial effects are as follows:

[0017] I, this liquid expansion type hand-automatic integrated controller can reduce the volume, processing is simpler, can reduce the cost, has the advantages such as multiple functions and strong performance.

[0018] II, the structure controller increases an over-temperature protection structure, can play over-temperature protection function, prevents automatic controller failure, control precision is high, and the over-temperature protection structure can be manually pressed reset, can be quickly used again.

[0019] III, the body base is made of high-temperature resistant material such as engineering plastic, is fireproof and flame-retardant, has small deformation coefficient, replaces traditional ceramic material, is easy to keep dimensional consistency in the production process, and is not easy to break and deform.

[0020] IV, the new structure adopts double-section contact contact and double-section contact separation to realize double power-off protection function.

[0021] V, the body base combined by the box seat and the mounting bracket is combined through riveting pressure, and the riveting pressure of the four edges of the product can play the roles of installation positioning and supporting, is simple to install, reliable, prevents the temperature controller from being loosened due to excessive plugging force in use. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is an embodiment structure schematic view in the utility model.

[0023] Figure 2 It is a cross-sectional structure schematic view in the utility model.

[0024] Figure 3 It is a controller structure, push rod and manual reset device cooperation structure schematic view in the utility model.

[0025] Figure 4 It is a push rod specific structure and diaphragm box cooperation schematic view in the utility model.

[0026] Figure 5 It is a controller structure exploded view schematic view in the utility model.

[0027] Figure 6 It is the energy storage spring piece structure schematic view in the utility model.

[0028] Figure 7 It is the second static contact piece installation structure schematic view in the utility model.

[0029] Figure 8 It is the controller decomposition structure schematic view in the utility model.

[0030] Figure 9 It is the mounting bracket local structure schematic view in the utility model.

[0031] Figure 10 It is the box seat structure schematic view in the utility model. DETAILED DESCRIPTION

[0032] The utility model is further explained below in connection with the drawings and examples.

[0033] Reference Figures 1 to 10 As shown in the figure, a kind of liquid expansion type hand-automatic controller, including the body base 1 of the assembly cavity 101 being arranged in, the assembly cavity 101 is equipped with diaphragm box 2, diaphragm box 2 is connected with capillary 3, and capillary 3 extends out the body base 1 and is connected with temperature sensing cylinder 4, the assembly cavity 101 is equipped with the controller structure being triggered with diaphragm box 2 cooperation, the controller structure includes automatic controller 5 and over-temperature protector 6 in series on conductive circuit;Automatic controller 5 includes the first movable contact assembly 51 and the first static contact assembly 52 of mutual contact cooperation, and the over-temperature protector 6 includes the second movable contact assembly 61 and the second static contact assembly 62 of mutual contact cooperation;The assembly cavity 101 is also slidably connected with the push rod 7 adjacent or abutting in the lower side of diaphragm box 2, when push rod 7 is pushed down by diaphragm box 2 expansion drum, first movable contact assembly 51 and second movable contact assembly 61 are pressed and contacted with in different positions in turn, and hand reset device 8 is also equipped on second movable contact assembly 61.

[0034] The liquid expansion type hand-automatic controller increases a kind of over-temperature protection structure, can play over-temperature protection function, prevent automatic controller 5 failure, control precision is high, and over-temperature protection structure can be manually pressed reset, can be quickly used again;Specific working principle is as follows:

[0035] When the temperature sensing cylinder 4 extends out of the base and monitors the temperature of the object to be controlled and the temperature changes, the diaphragm capsule 2 expands with the temperature change, and the push rod 7 is pushed down under the action of the expansion, the push rod 7 presses the first moving contact assembly 51, and the first moving contact assembly 51 is separated from the first stationary contact assembly 52, so that the conductive circuit of the controller structure is disconnected. When the temperature reaches the temperature point controlled by the temperature, the first moving contact assembly 51 and the first stationary contact assembly 52 are not separated, and the diaphragm capsule 2 continues to expand and push the push rod 7 to a deeper position, so that the push rod 7 presses the second moving contact assembly 61, and the second moving contact assembly 61 is separated from the second stationary contact assembly 62, which plays a role in over-temperature protection.

[0036] The top of the push rod 7 and the diaphragm capsule 2 are provided with a rotation stopping structure for limiting the rotation of the push rod 7. In this embodiment, the push rod 7 includes a rod head 71 and a pressing beam 72 integrally connected to the bottom of the rod head 71. One end of the pressing beam 72 is provided with a first touch pressure head 721 for pressing contact with the first moving contact assembly 51. The other end of the pressing beam 72 is screwed with an adjusting bolt 73, and the bottom of the adjusting bolt 73 constitutes a second touch pressure head 722 for pressing contact with the second moving contact assembly 61.

[0037] This structure can adjust the relative position between the second touch pressure head 722 and the second moving contact assembly 61 by adjusting the adjusting bolt 73, and can realize fine adjustment before leaving the factory, which makes up for the installation error. In addition, since the adjusting bolt 73 is hidden in the assembly cavity 101, a stretch-in hole 102 is provided on the body base 1 corresponding to the adjusting bolt 73, and the stretch-in hole 102 is coaxially arranged with the adjusting bolt 73, so that the adjusting tool (such as a screwdriver) can be conveniently inserted into the assembly cavity 101 to rotate the adjusting bolt 73.

[0038] In combination with the above-mentioned push rod 7 structure, the rotation stopping structure includes a hexagonal hole 711 opened at the top end of the rod head 71, and the diaphragm capsule 2 is connected with a hexagonal head 21 matched with the hexagonal hole 711. Through the cooperation of the hexagonal head 21 and the hexagonal hole 711, the push rod 7 and the body base 1 do not have a guide structure, which can prevent the push rod 7 from rotating when the diaphragm capsule 2 pushes the push rod 7, and cause the first touch pressure head 721 and the second touch pressure head 722 to deviate.

[0039] The first moving contact assembly 51 and the second moving contact assembly 61 are arranged in parallel in the assembly cavity 101, the fixed end and the movable end of the first moving contact assembly 51 and the second moving contact assembly 61 are on the same side, the second stationary contact assembly 62 is connected between the fixed end of the first moving contact assembly 51 and the movable end of the second moving contact assembly 61, and the distance between the second moving contact assembly 61 and the second contact pressure head 722 is greater than the distance between the first moving contact assembly 51 and the first contact pressure head 721; the arrangement of the first moving contact assembly 51 and the second moving contact assembly 61 can make the space utilization efficient, reduce the occupied space of the assembly cavity 101, and thus the volume of the controller can be reduced.

[0040] In the embodiment, the second moving contact assembly 61 comprises a second fixed seat 611, a second spring sheet 612 and an energy storage spring sheet 613, the second fixed seat 611 is fixed on the body base 1 through a first bolt 614, the fixed end of the second spring sheet 612 is connected to the second fixed seat 611, and the second spring sheet 612 is cut into a second top sheet 615 towards the fixed end, the second top sheet 615 is provided with a second boost curved part 616 which is in pressure contact with the first contact pressure head 721, and the energy storage spring sheet 613 is pressure-welded between the curved end of the second top sheet 615 and the movable end of the second spring sheet 612, and the movable end of the second spring sheet 612 is further connected with a second moving contact head 617.

[0041] When the second moving contact head 617 is in pressure contact with the second boost curved part 616, the second top sheet 615 is lowered, and the energy storage spring sheet 613 is compressed to store energy, and when the elastic energy storage reaches a certain value, the other end of the energy storage spring sheet 613 jumps the second spring sheet 612, so that the movable end of the second spring sheet 612 and the second moving contact head 617 are popped up and separated from the second stationary contact assembly 62 to achieve power-off.

[0042] In addition, the outer side of the body base 1 is further fixed with a second connecting terminal 618 through the first bolt 614, and the second connecting terminal 618 is electrically connected with the second moving contact assembly 61 through the first bolt 614.

[0043] In the above embodiment, the energy storage spring sheet 613 comprises a spring sheet body 6131 in the shape of a "door", the two ends of the spring sheet body 6131 are respectively bent with a first bent spring sheet 6132 and a second bent spring sheet 6133, the first bent spring sheet 6132 and the second bent spring sheet 6133 form an obtuse angle with the spring sheet body 6131, the first bent spring sheet 6132 is abutted against the bottom surface of the second spring sheet 612, and the junction between the first bent spring sheet 6132 and the second bent spring sheet 6133 and the spring sheet body 6131 is provided with a positioning opening 6134, and the curved end of the second top sheet 615 and the movable end of the second spring sheet 612 are extended with a positioning end sheet 6135 which cooperates with the positioning opening 6134; the above structure is simple to install, convenient to disassemble, replace and assemble.

[0044] In the embodiment, the first moving contact assembly 51 comprises a first fixed seat 511 and a first spring piece 512, the first fixed seat 511 is fixed on the body base 1 through a first rivet 513, the fixed end of the first spring piece 512 is connected to the first fixed seat 511, the first spring piece 512 is provided with a first power-assisted curved part 514 which is in pressure contact with the first pressure head 721, and the first spring piece 512 is cut into a first top piece 515 towards the movable end, the end of the first fixed seat 511 is bent to form a groove plate 516, the raised end of the first top piece 515 is located in a lateral vertebra groove 517 on the groove plate 516, and the movable end of the first spring piece 512 is further connected to a first moving contact head 518.

[0045] When the first moving contact head 518 is in pressure contact with the first power-assisted curved part 514, the movable end of the first spring piece 512 with the first moving contact head 518 swings downward and is separated from the first stationary contact assembly 52 to achieve power-off, at the same time, the arc-shaped first top piece 515 is stretched to store energy, after the first moving contact head 518 leaves the first power-assisted curved part 514, the first top piece 515 pulls the first spring piece 512 to pop up and reset upward, so that the first moving contact assembly 51 and the first stationary contact assembly 52 can automatically release power-on again.

[0046] The second stationary contact assembly 62 comprises a second stationary contact piece 621 located below the second moving contact assembly 61, one end of the second stationary contact piece 621 is provided with a second stationary contact head 622 which is in contact with the movable end of the second moving contact assembly 61, the other end of the second stationary contact piece 621 is fixed on the body base 1 through the first rivet 513 and is electrically connected with the first moving contact assembly 51; the second stationary contact piece 621 is obliquely connected between the first moving contact assembly 51 and the second moving contact assembly 61, so that the controller structure layout is more compact and reasonable.

[0047] Specifically, the outer bottom surface of the body base 1 is provided with a mounting groove 103 matching the shape of the second stationary contact piece 621, the second stationary contact piece 621 is embedded in the mounting groove 103 and is isolated from the automatic controller 5 and the over-temperature protector 6; the second stationary contact piece 621 is externally arranged on the body base 1, so that the second stationary contact piece 621 does not need to occupy the space of the assembly cavity 101, thereby reducing the volume of the body base 1, in addition, the creepage distance between the second stationary contact piece 621 and the first moving contact assembly 51 and the second moving contact assembly 61 can be increased, and the safety of the controller can be improved.

[0048] In addition, the mounting groove 103 is further encapsulated with an insulating plate 9, and the insulating plate 9 is arranged on the bottom surface of the second stationary contact piece 621; the second stationary contact piece 621 is encapsulated in the mounting groove 103 through the insulating plate 9, so that the second stationary contact piece 621 can be prevented from leaking out, and the installation is simple and convenient.

[0049] The first static contact assembly 52 comprises a first static contact piece 521 and a first connecting terminal 522, the first static contact piece 521 is fixed in the assembling cavity 101 through one end cooperating with the second bolt 524, the other end of the first static contact piece 521 is connected with a first static contact head 523, the first static contact head 523 is in contact with the first dynamic contact head 518, the first connecting terminal 522 is fixedly connected outside the body base 1 through the second bolt 524, and the heads of the first bolt 614 and the second bolt 524 are exposed outside the body base 1, so that workers can conveniently perform assembly operation and production efficiency is improved.

[0050] The manual reset device 8 comprises a manual push rod 81, the manual push rod 81 is slidingly connected in the guide hole 104 of the body base 1, one end of the manual push rod 81 is exposed outside the body base 1, and the other end is arranged in abutment or proximity with the movable end of the second dynamic contact assembly 61; when the temperature of the heated product drops to a certain temperature, the manual push rod 81 can be manually pressed to push, so that the second dynamic contact assembly 61 is reset.

[0051] In addition, the bottom of the manual push rod 81 is provided with a pull-resistant structure, the pull-resistant structure is arranged below the guide hole 104, so that the manual push rod 81 cannot be pulled out, and in the embodiment, the pull-resistant structure can be a ring structure 82 with a diameter greater than the guide hole 104.

[0052] The top of the body base 1 is threadedly connected with a temperature adjusting rod 10, the temperature adjusting rod 10 is internally provided with a threaded through hole 1001, the membrane box 2 is provided with a convex rod 22 in linear sliding cooperation with the threaded through hole 1001, the threaded through hole 1001 is threadedly connected with a fine adjustment rod 11, and the fine adjustment rod 11 abuts against the upper side of the convex rod 22; the distance between the membrane box 2 and the push rod 7 can be controlled by rotating the temperature adjusting rod 10, so that the temperature is controlled, and when the factory adjustment is performed, the fine adjustment rod 11 can be screwed to change the initial distance between the temperature adjusting rod 10 and the membrane box 2.

[0053] The body base 1 is in a square box structure, the box structure comprises a box seat 12 made of high-temperature-resistant material and a mounting bracket 13 (the mounting bracket 13 is in a box cover shape) made of metal material by stamping and bending, and the box seat 12 and the mounting bracket 13 jointly define the assembling cavity 101; the high-temperature-resistant material is adopted, fire resistance and flame resistance are achieved, the deformation coefficient is small, the traditional ceramic material is replaced, size consistency is easily maintained in the production process, and breakage and deformation are not prone to occur.

[0054] The four side walls of the mounting bracket 13 extend with riveting plates 131, the bottom of the riveting plates 131 is provided with a slit, wall grooves 121 for accommodating the riveting plates 131 are formed on the outer side walls of the box seat 12, the bottom of the wall grooves 121 is provided with dovetail openings 122, the bottom of the riveting plates 131 is formed with dovetail parts 132 by riveting the slit, and the dovetail parts 132 are clamped in the dovetail openings 122, so that the box seat 12 and the mounting bracket 13 are assembled and connected; the four edges of the product are riveted, which can play a role of installation positioning and supporting, and the installation is simple and reliable, and the problem that the temperature controller is loosened due to too large plugging force in use is prevented.

[0055] The top wall of the mounting bracket 13 is formed with connecting folded ears 133 by stamping, the connecting folded ears 133 are provided with through holes 134 for assembling the automatic controller 5, the side edges of one side wall of the mounting bracket 13 are provided with notches 135, the notches 135 and the adjacent side walls form through holes 136, the capillary tube 3 extends out of the body base 1 through the through holes 136, and the adjacent side walls are further provided with crimping edges 137, the capillary tube 3 is wound by the crimping edges 137, so that the capillary tube 3 is fixed; the top wall of the mounting bracket 13 is connected with an internally threaded sleeve 138, the temperature adjusting rod 10 is provided with an externally threaded part 1002, and the externally threaded part 1002 is connected with the internally threaded sleeve 138 on the mounting bracket 13.

[0056] The box seat 12 is provided with connecting through holes 105 matched with the first bolt 614, the second bolt 524, the first rivet 513 and the second static contact 622, so that the first dynamic contact assembly 51, the first static contact assembly 52, the second dynamic contact assembly 61 and the second static contact assembly 62 are assembled and fixed with the box seat 12 by the first bolt 614, the second bolt 524, the first rivet 513 and the second static contact 622.

[0057] Moreover, the temperature adjusting rod 10 is connected with a limiting swing block 1003 rotating with the temperature adjusting rod 10, the mounting bracket 13 is provided with a limiting baffle 139 upwardly folded by stamping, and the limiting baffle 139 can limit the rotating angle of the temperature adjusting rod 10, so that the temperature adjusting rod 10 is prevented from being excessively rotated out or in.

[0058] The above is the preferred scheme of the present application, and the basic principle, main features and advantages of the present application are displayed and described. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and the description in the specification only illustrate the principle of the present application, and various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application, and the scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A liquid expansion type hand self-control device, comprising a body base with an assembly cavity, a diaphragm box is arranged in the assembly cavity, a capillary tube is connected to the diaphragm box and extends out of the body base and is connected with a temperature sensing cylinder, a controller structure is arranged in the assembly cavity and is in triggering cooperation with the diaphragm box, characterized in that: The controller structure comprises an automatic controller and an over-temperature protector connected in series on the conductive circuit; the automatic controller comprises a first moving contact assembly and a first stationary contact assembly in contact with each other, and the over-temperature protector comprises a second moving contact assembly and a second stationary contact assembly in contact with each other; the assembly cavity is further slidably connected with a push rod adjacent to or abutting against the lower side of the diaphragm capsule, the push rod is in pressure contact with the first moving contact assembly and the second moving contact assembly in different positions in sequence when the push rod is pushed downward by the diaphragm capsule, and the second moving contact assembly is further provided with a manual reset device. ​ 2. A fluid-operated automatic controller according to claim 1, characterized in that: A rotation-stopping structure for limiting rotation of the push rod is arranged between the top of the push rod and the diaphragm capsule, one end of the bottom of the push rod is provided with a first pressure head in pressure contact with the first moving contact assembly, and the other end of the bottom of the push rod is screwed with an adjusting bolt, and the bottom of the adjusting bolt constitutes a second pressure head in pressure contact with the second moving contact assembly.

3. A hydro-boost type of a hand-automatic controller according to claim 2, characterized in that: The first moving contact assembly and the second moving contact assembly are arranged in parallel with each other in the assembly cavity, the fixed end and the movable end of the first moving contact assembly and the second moving contact assembly are on the same side, the second stationary contact assembly is connected between the fixed end of the first moving contact assembly and the movable end of the second moving contact assembly, and the distance between the second moving contact assembly and the second pressure head is greater than the distance between the first moving contact assembly and the first pressure head.

4. A fluid-operated automatic controller according to claim 2 or 3, characterised in that: The second moving contact assembly comprises a second fixed seat, a second spring piece and an energy storage spring piece, the second fixed seat is fixed on the body base by a first bolt, the fixed end of the second spring piece is connected to the second fixed seat, the second spring piece is cut into a second top piece towards the fixed end, the second top piece is provided with a second power-assisted curved part in pressure contact with the first pressure head, and the energy storage spring piece is pressure-welded between the raised end of the second top piece and the movable end of the second spring piece, and the movable end of the second spring piece is further connected with a second moving contact head.

5. A hydro-boost type of a hand-automatic controller according to claim 4, characterized in that: The energy storage spring piece comprises a "door"-shaped spring body, the two ends of the spring body are respectively bent with a first bent spring piece and a second bent spring piece, the first bent spring piece is abutted against the bottom surface of the second spring piece, and the junctions between the first bent spring piece, the second bent spring piece and the spring body are provided with positioning openings, and the raised end of the second top piece and the movable end of the second spring piece are extended with positioning end pieces matched with the positioning openings.

6. A hydro-expanding type of hand-automatic controller according to claim 2 or 3, characterized in that: The first moving contact assembly comprises a first fixed seat and a first spring piece, the first fixed seat is fixed on the body base by a first rivet, the fixed end of the first spring piece is connected to the first fixed seat, the first spring piece is provided with a first power-assisted curved part in pressure contact with the first pressure head, the first spring piece is cut into a first top piece towards the movable end, the end of the first fixed seat is bent with a groove plate, the raised end of the first top piece is positioned in a lateral vertebra groove on the groove plate, and the movable end of the first spring piece is further connected with a first moving contact head.

7. A hydro-boost type of a hand-automatic controller according to claim 6, characterized in that: The second stationary contact assembly comprises a second stationary contact piece arranged on the lower side of the second moving contact assembly, one end of the second stationary contact piece is provided with a second stationary contact point in contact with the movable end of the second moving contact assembly, and the other end of the second stationary contact piece is fixed on the body base by a first rivet and electrically connected with the first moving contact assembly.

8. A hydro-boost type of a hand-automatic controller according to claim 7, characterized in that: The outer bottom surface of the body base is provided with a mounting groove matching the shape of the second static contact, the second static contact is embedded in the mounting groove and is isolated from the automatic controller and the over-temperature protector, and an insulating plate is also encapsulated in the mounting groove and is arranged on the bottom surface of the second static contact.

9. A hydro-boost type of a hand-automatic controller according to claim 1, characterized in that: The manual reset device comprises a manual push rod which is slidingly connected in a guide hole of the body base and has one end exposed outside the body base and the other end arranged in abutment or close proximity to the movable end of the second movable contact assembly.

10. A hydro-boost type of a hand-automatic controller according to claim 1, characterized in that: The top of the body base is threadedly connected with a temperature adjusting rod, the temperature adjusting rod is provided with a threaded through hole, the diaphragm box is provided with a protruding rod which is in linear sliding cooperation with the threaded through hole, and a fine adjustment rod is threadedly connected in the threaded through hole and abuts against the upper side of the protruding rod.

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