A load-selectable liquid expansion thermostat

Abstract

The present invention discloses a load-selectable liquid expansion thermostat. Its main features include a load adjustment switch and a circuit conducting mechanism. The load adjustment switch is disposed on the body, and the circuit conducting mechanism is disposed on the body. The circuit conducting mechanism connects the movable contact piece and the terminal group. The terminal group includes a first terminal, a second terminal, and a third terminal. The first terminal is connected to the contact piece frame, and the second and third terminals are spaced apart and arranged opposite each other at the connection with the circuit conducting mechanism. The load adjustment switch conducts the circuit conducting mechanism so that the circuit conducting mechanism is connected to the second and third terminals, respectively. The present invention achieves connection with different terminals by providing a load adjustment switch and a circuit conducting mechanism, thus having wider applicability and higher value.

Description

Technical Field

[0001] The invention belongs to the technical field of temperature controllers, and in particular relates to a load-selectable liquid expansion temperature controller. Background Art

[0002] The working principle of a liquid expansion thermostat: Applying the principle of thermal expansion and contraction, a liquid working fluid is filled into a power assembly formed by welding a membrane box, capillary tube, temperature sensing tube, or temperature sensing bulb to form a closed space. Utilizing the physical properties of liquid thermal expansion and contraction, when the temperature sensing tube or temperature sensing bulb senses changes in the external temperature, the volume change of the working fluid inside converts the pressure or volume change in the closed space, causing the membrane box's diaphragm to displace. When the set value is reached, a mechanism consisting of a membrane handle, a pressure plate, and a push rod pushes a fast instantaneous switch composed of an elastic element to generate an on-off action. When the temperature rises, the switch opens, and when the temperature drops, the switch closes, achieving the temperature control function. Existing technology only has one load mode, that is, when connected to the power supply, the current flows in only one direction. Due to different actual needs, for example, when used in a water heater, the two heating tubes of the water heater can be used to realize circuit control of the two heating tubes. Traditional single circuits cannot meet the control requirements of two heating tubes. Summary of the Invention

[0003] The purpose of the present invention is to provide a liquid expansion thermostat that allows users to select different loads according to their needs.

[0004] To achieve the above-mentioned purpose, the technical solution of the present invention is: a load-selectable liquid expansion thermostat, comprising a body, a bottom cover, a power piece assembly, a bracket, an adjusting shaft, a terminal group, a moving contact piece and a contact piece frame, wherein the bottom cover covers the body, the power piece assembly is arranged between the body and the bottom cover, the bracket is arranged on the top of the body, the adjusting shaft passes through the bracket and is arranged on the body and the bottom end is connected to the power piece assembly, the terminal group is arranged on the body, the moving contact piece is arranged on the contact piece frame, the contact piece frame is arranged on the body, a limiting piece is arranged on the adjusting shaft, a baffle is arranged on the body, and the baffle is arranged on the In the movement direction of the limit plate, it also includes a load adjustment switch and a circuit cutting mechanism. The load adjustment switch is arranged on the main body, and the circuit cutting mechanism is arranged on the main body. The circuit cutting mechanism connects the moving contact piece and the terminal group; the terminal group includes a first terminal, a second terminal and a third terminal. The first terminal is connected to the contact piece frame, and the second terminal and the third terminal are arranged opposite to each other in the air at the connection with the circuit cutting mechanism; the load adjustment switch conducts circuit cutting of the circuit cutting mechanism so that the circuit cutting mechanism is connected to the second terminal and the third terminal respectively.

[0005] Preferably, the load adjustment switch includes a button, a guide seat, a guide frame, a rotating head, a pressure rod and a spring. The guide seat is arranged on the main body, the guide frame is arranged inside the guide seat and connected to the button, one end of the rotating head is connected to the guide frame and the other end is connected to the pressure rod, and the spring is arranged on the pressure rod.

[0006] Preferably, the circuit cutting mechanism includes a reed and a reed plate, the reed plate is arranged on the main body and connected to the moving contact piece, one end of the reed is arranged on the reed plate, and the other end of the reed is located between the second terminal and the third terminal, and the load adjustment switch is arranged on the main body and above the reed, and the load adjustment switch adjusts the reed to be connected to the second terminal and the third terminal respectively.

[0007] Preferably, the power component assembly includes a temperature-sensitive cylinder, a capillary tube, a pressure plate, a membrane box and a push rod, the temperature-sensitive cylinder is connected to the capillary tube, the end of the capillary tube is connected to the membrane box, the membrane box is arranged on the pressure plate, the push rod is arranged on the pressure plate and is located at one end of the pressure plate away from the membrane box, and a membrane handle is provided in the membrane box.

[0008] Preferably, a curved tongue is provided on the movable contact piece, a movable contact point is provided at one end of the movable contact piece close to the tongue piece, and one end of the movable contact piece away from the tongue piece is fixedly connected to the contact piece frame.

[0009] Preferably, a cavity is provided on the main body, and the adjustment shaft is provided in the cavity.

[0010] Preferably, a fastening clip is provided on the cavity, and the fastening clip is detachably connected to the bottom cover.

[0011] Preferably, a connecting hole is provided on the bottom cover, and the fastening clip is snap-connected to the connecting hole.

[0012] Preferably, a leaf spring is provided on the fastening clamp.

[0013] Preferably, a partition is provided on the main body.

[0014] Compared with the prior art, the beneficial effects of the present invention are: by providing a load adjustment switch, a reed, and a reed plate, the force of the load adjustment switch and the spring force of the reed itself are utilized to achieve connection with different terminal blocks, so that users can select different loads according to their needs, which has wider applicability and higher value. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] Figure 2 It is an exploded view of the structure of the present invention.

[0017] Figure 3 It is a schematic diagram of the structure of the power component of the present invention.

[0018] Figure 4 It is a schematic diagram of the internal structure of the body of the present invention.

[0019] Figure 5 This is a schematic diagram of the structure of the movable contact piece of the present invention.

[0020] Figure 6 This is a schematic diagram of the knob-shaped load adjustment switch of the present invention.

[0021] Figure 7 This is a schematic diagram of the button shape of the load regulation switch of the present invention.

[0022] Figure 8 This is a schematic diagram of the load regulating switch lever of the present invention.

[0023] Figure 9 Schematic diagram of the spiral shape of the load regulating switch of the present invention.

[0024] In the figure: main body 100, baffle 101, contact baffle 102, cavity 103, bottom cover 200, power component assembly 300, temperature sensing tube 301, capillary 302, pressure plate 303, membrane box 304, push rod 305, membrane handle 306, bracket 400, adjusting shaft 500, limit plate 501, terminal group 600, first terminal 601, second terminal 602, third terminal 603 moving contact piece 700, tongue piece 701, contact piece frame 800, 900, button 901, guide seat 902, guide frame 903, rotating head 904, pressure rod 905, spring 906, reed 1001, reed plate 1002, partition 1100, fastening clip 1200, leaf spring 1300. DETAILED DESCRIPTION

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

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

[0027] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0028] like Figures 1 to 9 As shown, an embodiment of the present invention provides a load-selectable liquid expansion thermostat, comprising a body 100, a bottom cover 200, a power component assembly 300, a bracket 400, an adjusting shaft 500, a terminal group 600, a moving contact piece 700 and a contact piece frame 800, wherein the bottom cover 200 covers the body 100, the power component assembly 300 is arranged between the body 100 and the bottom cover 200, the bracket 400 is arranged at the top of the body 100, the adjusting shaft 500 passes through the bracket 400 and is arranged on the body 100 and the bottom end is connected to the power component assembly 300, the terminal group 600 is arranged on the body 100, the moving contact piece 700 is arranged on the contact piece frame 800, the contact piece frame 800 is arranged on the body 100, a limiting piece 501 is arranged on the adjusting shaft 500, and a baffle 101 is provided on the body 100. The baffle 101 is arranged in the direction of movement of the limiting piece 501 Upward, a limit plate 501 and a baffle 101 are provided to limit the rotation of the adjustment shaft 500, and also include a load adjustment switch 900 and a circuit cutting mechanism 1000. The load adjustment switch 900 is provided on the main body 100, and the circuit cutting mechanism 1000 is provided on the main body 100. The circuit cutting mechanism 1000 connects the movable contact piece 700 and the terminal group 600; the terminal group 600 includes a first terminal 601, a second terminal 602 and a third terminal 603, the first terminal 601 is connected to the contact piece frame 800, and the second terminal 602 and the third terminal 603 are arranged opposite to each other in the air at the connection with the circuit cutting mechanism 1000; the load adjustment switch 900 cuts the circuit of the circuit cutting mechanism 1000 so that the circuit cutting mechanism 1000 is respectively connected to the second terminal 602 and the third terminal 603.

[0029] In this embodiment, the circuit conducting mechanism 1000 realizes the conduction and circuit switching of the terminal group. The circuit conducting mechanism 1000 includes a reed 1001 and a reed plate 1002. The reed plate 1002 is arranged on the body 100 and connected to the movable contact piece 700. One end of the reed 1001 is arranged on the reed plate 1002, and the other end of the reed 1001 is located between the second terminal 602 and the third terminal 603. The load regulating switch 900 is arranged on the body 100 and above the reed 1001. The load regulating switch 900 adjusts the reed 1001 to connect with the second terminal 602 and the third terminal 603 respectively.

[0030] Under normal working conditions, the first terminal 601 is a common terminal. Current flows through the first terminal 601, the contact frame 800, the movable contact 700, the reed plate 1002, and the reed 1001 to the second terminal 602. At this time, the movable contact 700 is connected to the reed plate 1002, and the reed 1001 is connected to the second terminal 602. When load adjustment is required, the movable contact 700 is still connected to the reed plate 1002, and the load adjustment switch 900 is pressed. 900 presses the reed 1001, so that the reed 1001 is connected to the third terminal 603. At this time, the current flows through the first terminal 601, the contact frame 800, the movable contact 700, the reed plate 1100, and the reed 1001 to the third terminal 603; when the temperature is too high, the power component 3 senses the temperature change and provides power to push the movable contact 700 to deform, so that the movable contact 700 is no longer connected to the reed plate 1002. At this time, the circuit is disconnected, which plays a role in protecting the circuit.

[0031] As a preferred embodiment, the load adjustment switch 900 is a push button switch, and a partition 1100 is provided on the body 100. Specifically, the load adjustment switch 900 includes a button 901, a guide seat 902, a guide frame 903, a rotating head 904, a pressure rod 905, and a spring 906. The guide seat 902 is provided on the body 100, the guide frame 903 is provided inside the guide seat 902 and connected to the button 901, the rotating head 904 is connected to the guide frame 903 at one end and to the pressure rod 905 at the other end, and the spring 906 is sleeved on the pressure rod 905. The guide seat 902 is connected to the main body 100 through the partition 1100 by screws. The structures from top to bottom are button 901, guide seat 902, guide frame 903, rotating head 904, spring 906, and pressure rod 905. Corresponding teeth are provided on the rotating head 904 and the guide frame 903. During installation, they are engaged and connected. The spring force keeps the button 901 in a taut state. Pressing the button 901 downward causes the pressure rod 905 to press down the spring 1001, so that the spring 1001 is disengaged from the initial position, that is, the connection with the second terminal 602 is disconnected, and then the third terminal 603 is connected. When it is necessary to connect to the second terminal 602, the button 901 returns to its original position. At this time, under the action of the spring force of the spring 1001 itself, it returns to its original position and is connected to the second terminal 602.

[0032] Specifically, the power component assembly 300 includes a temperature-sensing cylinder 301, a capillary tube 302, a pressure plate 303, a membrane cartridge 304, and a push rod 305. The temperature-sensing cylinder 301 is connected to the capillary tube 302, the distal end of which is connected to the membrane cartridge 304. The membrane cartridge 304 is mounted on the pressure plate 303. The push rod 305 is mounted on the pressure plate 303 and located at the end of the pressure plate 303 away from the membrane cartridge 304. A membrane handle 306 is provided within the membrane cartridge 304. Because the adjustment shaft 500 can be adjusted up and down based on the principle of relative motion of a thread, the relative displacement of the membrane cartridge 304 can be changed by rotating the adjustment shaft 500 to move it up and down and press against the top of the membrane cartridge 304. The power component assembly 300 is a sealed, welded chamber. After a temperature-sensing medium is filled into the sealed chamber formed by the temperature-sensing cylinder 301, capillary tube 302, and membrane cartridge 304, the temperature-sensing cylinder 301 senses the temperature, causing the medium inside to expand or contract, thereby displacing the elastic membrane cartridge 304. When the temperature-sensing cylinder 301 senses a higher temperature, the membrane cartridge 304 displaces, driving the pressure plate 303 upward. This, in turn, drives the push rod 305 upward, pushing open the movable contact 700, causing it to deform and disconnect from the reed plate 1002. When the temperature drops below zero, the components return to their original positions.

[0033] Specifically, the movable contact piece 700 is provided with a curved tongue piece 701. A movable contact point is provided at one end of the movable contact piece 700, which is close to the tongue piece 701. The end of the movable contact piece 700, which is away from the tongue piece 701, is fixedly connected to the contact piece frame 800. The pushing force of the push rod 305 deforms the movable contact piece 700, causing the tongue piece 701 to flip. After the deformation exceeds the flipping plane, the momentary switch quickly flips, disconnecting or connecting the movable contact point from the reed plate 1002, and thus disconnecting or connecting the movable contact point from the second terminal 602 or the third terminal 603, thereby achieving the purpose of controlling the circuit.

[0034] The body 100 is provided with a contact stopper 102 connected by screws, and the contact stopper 102 is provided below the movable contact piece 700. The provision of the contact stopper 102 can limit the deformation and displacement of the movable contact piece 700.

[0035] The second terminal 602, the third terminal 603, the movable contact piece 700, the spring 1001 and the spring plate 1002 are all provided with contacts for conducting the circuit. The spring 1001 is provided with contacts on both the upper and lower surfaces for connecting with the second terminal or the third terminal.

[0036] Furthermore, the body 100 is provided with a cavity 103, and the adjustment shaft 500 is disposed in the cavity 103. A limiting piece 501 is provided at the bottom of the adjustment shaft 500, and the limiting piece 501 is located in the cavity 103. A baffle 101 is provided in the cavity 103 and is engaged with the limiting piece 501. The baffle 101 and the limiting piece 501 work together to limit the adjustment shaft 500.

[0037] Furthermore, a fastening clip 1200 is provided on the cavity 103. The fastening clip 1200 is detachably connected to the bottom cover 2 and is provided with a leaf spring 1300. Specifically, a connection hole 201 is provided on the bottom cover 200, and the fastening clip 1200 is snap-fitted into the connection hole 201. The fastening clip 1200 consists of two side panels and a bottom panel. The bottom panel has a hole in the center. The adjustment shaft 500 is fixed to the fastening clip 1200 by threading into the hole. The limiting piece 501 is located between the bottom panel of the fastening clip 1200 and the leaf spring 1300.

[0038] In the present application, the load adjustment switch 900 can be a knob-shaped switch, a button-shaped switch, a lever-shaped switch, a spiral switch, etc., that is, the shape of the load adjustment switch 900 is not restricted, and the reed 1001 can be pressed and adjusted so that the reed 1001 can be connected to the second connection terminal 602 and the third connection terminal 603, all of which fall within the protection scope of the present application.

[0039] The principle of the present invention is as follows: the power component assembly 300 is a sealed cavity formed by welding. After the temperature-sensing tube 301, capillary tube 302, and membrane box 304 are filled with a temperature-sensing medium, when the temperature-sensing tube 301 senses the temperature, the temperature-sensing medium inside expands or contracts, thereby causing the elastic membrane box 304 to move. After the temperature-sensing tube 301 senses the temperature, the membrane box 304 is displaced and drives the pressure plate 303 to move up and down, and the push rod 305 follows the up and down movement. The moving contact piece 700 is deformed by the force, causing the tongue piece 701 to flip over. After the deformation exceeds the flip plane, the momentary switch flips rapidly, disconnecting or connecting the moving contact and the reed plate 1002, that is, realizing the disconnection or connection of the circuit, achieving the purpose of controlling the circuit; when the circuit is in a connected state, when load adjustment is required, pressing the button 901 causes the pressure rod 905 to act on the reed 1001, that is, the reed 1001 moves up and down, and can be connected to the second terminal 602 or the third terminal 603, to achieve different current flow directions.

[0040] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A load-selectable liquid expansion thermostat, comprising a body, a bottom cover, a power member assembly, a bracket, an adjustment shaft, a terminal block group, a movable contact piece, and a contact piece frame, wherein the bottom cover covers the body, the power member assembly is disposed between the body and the bottom cover, the bracket is disposed on the top of the body, the adjustment shaft passes through the bracket and is disposed on the body with its bottom end connected to the power member assembly, the terminal block group is disposed on the body, the movable contact piece is disposed on the contact piece frame, the contact piece frame is disposed on the body, a limit piece is disposed on the adjustment shaft, and a baffle is disposed on the body, the baffle being disposed in the direction of movement of the limit piece, characterized in that: It also includes a load adjustment switch and a circuit cutting mechanism, wherein the load adjustment switch is provided on the body, the circuit cutting mechanism is provided on the body, and the circuit cutting mechanism connects the movable contact piece and the terminal group; The terminal group includes a first terminal, a second terminal and a third terminal, the first terminal is connected to the contact frame, and the second terminal and the third terminal are arranged opposite to each other at the connection with the circuit cutting mechanism; The load regulating switch conducts circuit conduction of the circuit conducting mechanism so that the circuit conducting mechanism is respectively connected to the second terminal and the third terminal; the load regulating switch includes a button, a guide seat, a guide frame, a rotating head, a pressure rod and a spring, the guide seat is arranged on the main body, the guide frame is arranged inside the guide seat and connected to the button, one end of the rotating head is connected to the guide frame and the other end is connected to the pressure rod, and the spring is arranged on the pressure rod; the circuit conducting mechanism includes a reed and a reed plate, the reed plate is arranged on the main body and connected to the moving contact piece, one end of the reed is arranged on the reed plate, and the other end of the reed is between the second terminal and the third terminal, the load regulating switch is arranged on the main body and above the reed, and the load regulating switch adjusts the reed to be connected to the second terminal and the third terminal respectively.

2. The load-selectable liquid expansion thermostat according to claim 1, characterized in that: The power component assembly includes a temperature-sensitive cylinder, a capillary, a pressure plate, a membrane box and a push rod. The temperature-sensitive cylinder is connected to the capillary, and the end of the capillary is connected to the membrane box. The membrane box is arranged on the pressure plate. The push rod is arranged on the pressure plate and is located at the end of the pressure plate away from the membrane box. A membrane handle is provided in the membrane box.

3. The load-selectable liquid expansion thermostat according to claim 1, characterized in that: The movable contact piece is provided with a curved tongue piece, an end of the movable contact piece close to the tongue piece is provided with a movable contact point, and an end of the movable contact piece away from the tongue piece is fixedly connected to the contact piece frame.

4. The load-selectable liquid expansion thermostat according to claim 1, characterized in that: The main body is provided with a cavity, and the adjusting shaft is arranged in the cavity.

5. The load-selectable liquid expansion thermostat according to claim 4, characterized in that: A fastening clip is provided on the cavity, and the fastening clip is detachably connected to the bottom cover.

6. The load-selectable liquid expansion thermostat according to claim 5, characterized in that: The bottom cover is provided with a connecting hole, and the fastening clip is snap-connected to the connecting hole.

7. The load-selectable liquid expansion thermostat according to claim 6, characterized in that: The fastening clamp is provided with a leaf spring.

8. The load-selectable liquid expansion thermostat according to claim 1, characterized in that: A partition is provided on the main body.

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