Hydraulic temperature limiter

Abstract

The application discloses a hydraulic temperature limiter, which comprises a shell, a terminal one, a terminal two, a metal sheet, a spring sheet one, a spring sheet two, an elastic movable piece, an expansion film box and a reset piece, the terminal one and the terminal two are fixedly installed on the shell, the connecting end one of the metal sheet is fixedly connected to the shell and is in conduction with the terminal one, and the connecting end two of the metal sheet is supported through the support part in the shell. In the normal state, the temperature of the temperature measuring area slowly rises, the expansion film box can elastically push the elastic sheet to bend, the hydraulic temperature limiter can be disconnected, and at this time, automatic reset can be realized; if the temperature of the temperature measuring area rises too fast or the temperature of the temperature measuring area continues to rise after the temperature limiter is disconnected, the expansion film box will continue to expand and can continue to push the elastic sheet to bend; at this time, the elastic movable piece will be maintained at the deflected position and can always maintain the cut-off state, and reset needs to be performed through pressing, so that automatic connection is avoided.

Description

Technical Field

[0001] This invention relates to a temperature limiter, and more specifically, to a hydraulic temperature limiter. Background Technology

[0002] As an electromechanical integrated temperature control and protection device, the temperature limiter uses thermal deformation to drive a lever mechanism when the monitored temperature exceeds a preset threshold. This mechanism converts the temperature limiter into a contact separation action, cutting off the circuit. After the temperature drops to a safe range, the deformation component exhibits a reverse displacement tendency, enabling automatic reset. Some temperature limiters, for safety protection, employ a mechanical locking structure after disconnection, requiring manual intervention to release the safety lock for reset. However, in some applicable scenarios, temperature limiters need to perform multiple control functions, rendering current temperature limiters inadequate for these needs. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a hydraulic temperature limiter.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a hydraulic temperature limiter, comprising a housing, terminal one, terminal two, a metal sheet, spring sheet one, spring sheet two, an elastic movable component, an expansion diaphragm box, and a reset component. Terminal one and terminal two are fixedly installed in the housing. The connecting end one of the metal sheet is fixedly connected to the housing and communicates with terminal one. The connecting end two of the metal sheet is supported by a support portion within the housing. The fixed end one of spring sheet one is connected to the connecting end two of the metal sheet, and the elastic end one of spring sheet one extends towards terminal two. The fixed end two of spring sheet two is connected to the connecting end two of the metal sheet, and the elastic end two of spring sheet two extends towards terminal two. The elastic movable component is U-shaped and elastically engaged between the elastic end one and the elastic end two. The expansion diaphragm box and the reset component are located on opposite sides of spring sheet two. The expansion diaphragm box can expand and push spring sheet two towards terminal two. The reset component is used to push spring sheet two back to its original position.

[0005] It also includes a spring plate three, a linkage frame, a linkage rod, and a linkage block. One end of the spring plate three is fixedly connected to terminal two, and the other end is an elastic end three. The linkage frame is fixedly connected to the side of the elastic end three facing away from the spring plate one. The linkage rod includes a hinge end and a linkage end. The hinge end is rotatably connected to the housing, and the linkage rod passes through the linkage frame. The linkage block is fixedly connected to the second end of the expansion diaphragm box. The pressing part of the linkage block abuts against the linkage end of the linkage rod, and is used to push the linkage rod facing away from the spring plate one to elastically deflect. The linkage frame can realize the linkage between the linkage rod and the spring plate one.

[0006] The present invention is further configured such that a second contact is provided at the elastic end of the first spring sheet; and a first contact is provided at the elastic end of the third spring sheet.

[0007] The present invention is further configured such that a support spring is elastically pressed against the side of the linkage frame facing away from the second contact point.

[0008] The present invention is further configured such that the linkage frame includes a first linkage piece and a second linkage piece fixedly connected to each other, the first linkage piece being fixedly connected to an elastic end three, and the linkage rod passing through the first linkage piece and the second linkage piece of the linkage frame, with the linkage rod in contact with the second linkage piece.

[0009] The present invention is further configured such that the expansion film box has a first end and a second end, the expansion film box is located on the side of the spring sheet two facing away from the spring sheet three, and the second end is disposed towards the spring sheet two;

[0010] The present invention is further configured such that, in the initial state of the expansion diaphragm, there is a gap between the second end and the second spring sheet, and the second end abuts against the linkage end of the linkage rod;

[0011] The invention is further configured such that the expansion membrane expands, and the second end gradually extends toward the second spring sheet until it abuts against the second spring sheet, thereby pushing the second spring sheet to deflect.

[0012] The present invention is further configured such that the spring sheet has a first state and a second state. In the first state, the spring sheet can elastically maintain the contact point two connected with the contact point one; in the second state, the spring sheet can deflect away from the contact point one, and the contact point two is disconnected from the contact point one.

[0013] The invention is further configured such that the expansion diaphragm acts against the second spring sheet, which can elastically push the second spring sheet to bend elastically, and the elastic movable member can deflect between the elastic end one of the first spring sheet and the elastic end two of the second spring sheet, and the elastic movable member can elastically push the first spring sheet to the second state.

[0014] The invention is further configured such that the expansion diaphragm box is located on the side of the spring sheet two facing away from the contact one, and the reset member and the contact one are located on the same side of the spring sheet two; a support plate is fixedly installed inside the half shell one, and the expansion diaphragm box is installed on the side of the support plate facing away from the spring sheet two.

[0015] The invention is further configured such that an adjusting screw is threaded onto the housing, the adjusting screw abutting against the second end of the expansion diaphragm box; and a spring is installed on the side of the support plate facing the expansion diaphragm box, the spring being able to elastically push the expansion diaphragm box toward the second end.

[0016] The present invention is further configured such that: the first elastic end is integrally connected to the first locking block, and the second elastic end is integrally connected to the second locking block, the first locking block and the second locking block being disposed opposite to each other; the elastic movable member includes the first movable end and the second movable end, the first movable end and the second movable end are respectively provided with locking slots, the elastic movable member is located between the first locking block and the second locking block, and the first locking block and the second locking block are respectively engaged in the locking slots of the first movable end and the second movable end.

[0017] The present invention is further configured such that both the first and second movable ends of the elastic movable member are provided with bending portions, and the two bending portions are bent inward and recessed on the northward side, and the two bending portions can be respectively engaged and limited with the first and second elastic ends.

[0018] In summary, the present invention has the following beneficial effects:

[0019] The linkage between the expansion diaphragm and the spring plate three can be achieved through the linkage rod and linkage block. When the expansion diaphragm expands elastically, it can drive the spring plate three to deflect through the linkage rod and linkage block, thereby enabling the deflected spring plate three to separate and disconnect the contacts one and two, so that the temperature limiter can automatically reset.

[0020] As the expansion diaphragm continues to expand, it can abut against the second spring plate, elastically pushing the second spring plate to deflect. After the second spring plate bends at a certain angle, the U-shaped elastic movable part that was originally elastically installed between the elastic end one of the first spring plate and the elastic end two of the second spring plate will deflect, causing a relative deflection position between the elastic end one of the first spring plate and the elastic end two of the second spring plate. After the expansion diaphragm re-contracts, it remains in a disconnected state, that is, in a forced disconnected state, and needs to be reset by pressing to avoid reconnection. Attached Figure Description

[0021] Figure 1 This is an exploded view of a hydraulic temperature limiter in Example 1;

[0022] Figure 2 This is a schematic diagram of the structure of spring sheet one, spring sheet two, elastic movable component and reset component in Embodiment 1;

[0023] Figure 3 This is a perspective view of a hydraulic temperature limiter according to Embodiment 1;

[0024] Figure 4 This is a perspective sectional view of a hydraulic temperature limiter according to Embodiment 1;

[0025] Figure 5 This is a schematic diagram of the first state of a hydraulic temperature limiter in Embodiment 1;

[0026] Figure 6This is a schematic diagram of the second state of a hydraulic temperature limiter in Embodiment 1;

[0027] Figure 7 This is a cross-sectional view of a hydraulic temperature limiter in Embodiment 2;

[0028] Figure 8 This is a schematic diagram of the structure of each metal contact in Example 2. Figure 1 ;

[0029] Figure 9 This is a schematic diagram of the structure of each metal contact in Example 2. Figure 2 .

[0030] Reference numerals: Half-shell 1; Support 101; Half-shell 2; Support plate 3; Terminal 1 401; Terminal 2 402; Contact 1 4021; Metal sheet 5; Connecting end 1 501; Connecting end 2 502; Spring sheet 1 6; Fixed end 1 601; Elastic end 1 602; Locking block 1 6022; Contact 2 6021; Frame-shaped inner periphery 603; Spring sheet 2 7; Fixed end 2 701; Elastic end 2 702; Locking block 2 7021; Arc-shaped protrusion 1 703; Arc-shaped protrusion 2 704; Elastic movable part 8; Movable end 1 801; Movable end 2 802; Slot 803; Bending part 804; Expansion diaphragm box 9; First end 901; Second end 902; Spring 10; Temperature sensing bag 11; Adjusting screw 12; Reset part 13;

[0031] Spring plate 3 14; elastic end 3 1401; arc-shaped bend 1402; linkage frame 15; linkage plate 1 1501; linkage plate 2 1502; linkage rod 16; hinge end 1601; linkage end 1602; linkage block 17; clearance groove 1701; pressing part 1702; support spring 18. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1

[0034] This embodiment discloses a hydraulic temperature limiter, referring to... Figures 1-7As shown, it includes a housing, a support plate 3, a terminal 1 401, a terminal 2 402, a metal sheet 5, a spring sheet 1 6, a spring sheet 2 7, an elastic movable part 8, an expansion diaphragm box 9, and a reset part 13. The housing includes a half-shell 1 and a half-shell 2, which cover each other to form a complete housing. Most of the components are installed in the housing.

[0035] Reference Figure 1 , Figure 2 As shown, the support plate 3 is fixedly installed inside the housing, which can roughly divide the inner cavity of the housing into two chambers. The expansion diaphragm box 9 is installed in one chamber, and the contact pieces are installed in the other chamber.

[0036] Reference Figure 1 , Figure 3 As shown, terminal 1 401 and terminal 2 402 are fixedly installed on the housing, and parts of terminal 1 401 and terminal 2 402 extend out of the housing, serving as two electrical terminals of the hydraulic temperature limiter.

[0037] The metal sheet 5 includes a first connecting end 501 and a second connecting end 502. The first connecting end 501 is fixedly connected to the housing and communicates with the first terminal 401. The second connecting end 502 is supported by a support portion 101 inside the housing. The support portion 101 is a tapered support column, and a through hole is provided in the second connecting end 502. The diameter of the hole is larger than the small diameter end of the tapered portion and smaller than the large diameter end of the tapered portion, so that the through hole of the second connecting end 502 can fit onto the tapered portion of the support portion 101 to achieve support and positioning. When reset is required, the metal sheet 5 can be pushed by the reset member 13, so that the metal sheet 5 can move towards the small diameter end of the support portion 101.

[0038] Reference Figure 1 , Figure 2 As shown, the spring sheet 6 includes a fixed end 601 and an elastic end 602. The fixed end 601 is fixedly connected to the connecting end 502 of the metal sheet 5, and the elastic end 602 extends toward the terminal 402. The elastic end 602 and the terminal 402 of the spring sheet 6 are close to each other. A contact 4021 is fixedly installed on the terminal 402, and a contact 6021 is fixedly installed on the elastic end 602 of the spring sheet 6. Through the mutual contact and separation of the contact 6021 and the contact 4021, on / off switching can be achieved.

[0039] Spring sheet 2 7 includes a fixed end 2 701 and an elastic end 2 702. The fixed end 2 701 is connected to the connecting end 2 502 of the metal sheet 5. The elastic end 2 702 extends toward the terminal 2 402 and is close to the elastic end 1 602 of spring sheet 1 6. Specifically, a frame-shaped inner periphery 603 is formed in the middle of spring sheet 1 6. Spring sheet 2 7 is located inside the frame-shaped inner periphery 603, and the fixed end 2 701 of spring sheet 2 7 is integrally connected to the fixed end 1 601 of spring sheet 1 6.

[0040] A first locking block 6022 is integrally connected to the first elastic end 602, and a second locking block 7021 is integrally connected to the second elastic end 702. The first locking block 6022 and the second locking block 7021 are positioned opposite each other.

[0041] The flexible movable component 8 is U-shaped and includes a movable end 601 and a movable end 702. The flexible movable component 8 is installed between the flexible end 602 and the flexible end 702, and the width of the flexible movable component 8 is slightly larger than the distance between the flexible end 602 and the flexible end 702, so that the flexible movable component 8 can be elastically engaged between the flexible end 602 and the flexible end 702.

[0042] Slots 803 are provided at movable end 1 801 and movable end 2 802 respectively. Slot 1 6022 and slot 2 7021 are respectively inserted into slots 803 at movable end 1 801 and movable end 2 802, which can maintain the position of the elastic movable member 8 at elastic end 1 602 and elastic end 2 702.

[0043] Furthermore, both movable ends 801 and 802 of the elastic movable member 8 are provided with bending portions 804, with the north-facing side of each bending portion 804 bent inward and recessed. The position of the bending portion 804 partially overlaps with the position of the slot 803. After the first locking block 6022 and the second locking block 7021 are inserted into the slot 803, the first elastic end 602 and the second elastic end 702 can be partially inserted into the two bending portions 804, thus limiting the insertion position.

[0044] Reference Figure 1 , Figure 4 As shown, the expansion diaphragm box 9 and the reset piece 13 are located on both sides of the spring plate 7, respectively. They can apply force to both sides of the spring plate 7, adjust the deflection state of the spring plate 7, and thus switch the hydraulic temperature limiter.

[0045] The expansion diaphragm 9 is connected to the temperature sensing bag 11 via a capillary tube. The temperature sensing bag 11 is installed in the temperature measuring area. When the temperature of the temperature measuring area rises, the liquid in the temperature sensing bag 11 can expand in response to the temperature. The pressure of the expansion can be transmitted to the expansion diaphragm 9 through the capillary tube, causing the expansion diaphragm 9 to expand. A relative displacement will occur between the first end 901 and the second end 902 of the expansion diaphragm 9. The second end 902 can push the second spring plate 7 to bend and deform, pushing the second spring plate 7 to shift towards the second terminal 402.

[0046] The reset element 13 is used to push the spring plate 7 to reset. The reset element 13 is slidably connected to the housing, with part extending outside the housing and part located inside. Pressing the reset element 13 inward can push the spring plate 7 to reset towards the expansion diaphragm box 9. If the expansion diaphragm box 9 is still in an expanded state during reset, it indicates that the temperature of the temperature measuring area is still higher than the pre-test temperature, and reset cannot be achieved.

[0047] Furthermore, the spring sheet 7 has an arc-shaped protrusion 703 and an arc-shaped protrusion 704. The arc-shaped protrusion 703 protrudes towards the expansion diaphragm 9 and can abut against the expansion diaphragm 9. The arc-shaped protrusion 704 protrudes towards the reset member 13 and can abut against the reset member 13.

[0048] Reference Figure 5 , Figure 6 As shown, the expansion diaphragm 9 is located on the side of the spring sheet 7 facing away from the contact 4021, and the reset member 13 and the contact 4021 are located on the same side of the spring sheet 7. The spring sheet 6 has two states, namely the first state (refer to...). Figure 5 (as shown) and the second state (refer to) Figure 6 (As shown).

[0049] Reference Figure 5 As shown, when spring sheet 6 is in the first state, spring sheet 6 and spring sheet 7 are approximately in the same plane. The elastic moving part 8 maintains spring sheet 6 and spring sheet 7 in a stable state. Spring sheet 6 can elastically maintain the connection between contact 6021 and contact 4021.

[0050] Reference Figure 6 As shown, when spring plate 6 is in the second state, spring plate 6 can deflect away from contact point 4021 (i.e., bend downwards). The elastic end 702 of spring plate 7 will push the elastic movable member 8 to deflect, and the right side of the elastic movable member 8 will deflect downwards until the elastic movable member 8 produces a lateral deflection. Figure 6 At this time, the other side (left side) of the elastic movable member 8 will push the elastic end 602 to deflect upward, so that the contact 6021 of the elastic end 602 separates from the contact 4021, and the contact 6021 and the contact 4021 are disconnected from each other.

[0051] A support plate 3 is fixedly installed inside the semi-shell 1. An expansion diaphragm 9 is installed on the side of the support plate 3 facing away from the spring sheet 7. The expansion diaphragm 9 has a first end 901 and a second end 902. The second end 902 of the expansion diaphragm 9 passes through the support plate 3 and can slide vertically with the support plate 3, so that the second end 902 of the expansion diaphragm 9 can elastically resist the spring sheet 7 when facing downward.

[0052] Furthermore, an adjusting screw 12 is threaded onto the upper side of the housing, and the adjusting screw 12 abuts against the second end 902 of the expansion diaphragm 9. A spring 10 is installed on the side of the support plate 3 facing the expansion diaphragm 9. The spring 10 can elastically push the expansion diaphragm 9 towards the second end 902, maintaining the expansion diaphragm 9 in a stable state. During adjustment, by adjusting the adjusting screw 12, the expansion diaphragm 9 can be pushed, adjusting the initial state of the second end 902 of the expansion diaphragm 9 and the spring plate 7.

[0053] The second end 902 of the expansion diaphragm 9 presses against the second spring sheet 7, which can elastically push the second spring sheet 7 to bend elastically. During the detection process, after the temperature sensing bag 11 detects the temperature rise in the temperature measuring area, the liquid in the temperature sensing bag 11 expands, which causes the first end 901 and the second end 902 of the expansion diaphragm 9 to expand. The second end 902 of the expansion diaphragm 9 can push the second spring sheet 7 to bend elastically toward the side (downward side) of the reset member 13. The elastic end 602 of the first spring sheet 6 and the elastic end 702 of the second spring sheet 7 will have a height change. The elastic movable member 8 can deflect between the elastic end 602 of the first spring sheet 6 and the elastic end 702 of the second spring sheet 7. The elastic movable member 8 can elastically push the first spring sheet 6 to the second state. At this time, the elastic end 602 of the first spring sheet 6 deflects away from the contact point 4021. The second contact 6021 and the first contact 4021 will separate from each other, and can switch from the original connected state to the disconnected state.

[0054] When a reset is required, pressing the reset member 13 causes it to abut against the second spring plate 7, which elastically pushes the second spring plate 7 to bend away from the first contact 4021. The reset member 13 pushes the elastic end 702 of the second spring plate 7, readjusting it to a basically opposite state with the elastic end 602 of the first spring plate 6. The elastic movable member 8 can generate a reverse deflection between the elastic end 602 of the first spring plate 6 and the elastic end 702 of the second spring plate 7. The elastic movable member 8 can elastically push the first spring plate 6 to the first state. At this time, the elastic end 602 of the first spring plate 6 deflects towards the first contact 4021, and the second contact 6021 and the first contact 4021 will come together and connect, switching from the original disconnected state to the connected state.

[0055] Example 2

[0056] In some applicable scenarios, the current thermostat cannot meet the applicable requirements. For example, define preset temperature A and preset temperature B, and A < B. When the limiter is in use, when the monitored temperature gradually rises and is greater than A and less than B, the thermostat needs to be able to disconnect, and after the temperature drops, it needs to be able to automatically reset; when the detected temperature rises and is greater than B, it needs to be able to disconnect, and the safety lock needs to be locked and cannot be automatically reset, and manual reset is required.

[0057] This embodiment discloses a hydraulic thermostat. On the basis of Embodiment 1, it will be described in detail by referring to Figures 7-9 to solve the above technical problems.

[0058] In this embodiment, the first contact 4021 is not directly fixedly installed on the second terminal 402, but is indirectly installed through the third spring piece 14. Referring to Figure 7 、 Figure 8 As shown, the third spring piece 14 is fixedly installed in a stacked manner at the second terminal 402. The third spring piece 14 has an elastic end 1401. The first contact 4021 is riveted and fixed to the elastic end 1401, so that the first contact 4021 can also perform an elastic deflection action. When the third spring piece 14 deflects upward relative to the second contact 6021, the first contact 4021 and the second contact 6021 can be connected to each other, and when deflecting downward, they are disconnected from each other.

[0059] In order to enable the third spring piece 14 to elastically deform flexibly, an arc-shaped bending portion 1402 can be preset in the middle section of the third spring piece 14, which can make it easier to bend and deform.

[0060] On the side of the elastic end 1401 of the third spring piece 14 facing away from the second spring piece 7, a frame-shaped linkage 15 is fixedly installed. The linkage 15 has a first linkage piece 1501 and a second linkage piece 1502 that are fixedly connected to each other, and the first linkage piece 1501 is fixedly connected to the elastic end 1401. In addition, a support spring 18 is elastically pressed against the side of the linkage 15 facing away from the second contact 6021. Through the support spring 18, the linkage 15 and the third spring piece 14 can be maintained, and in the initial state, the first contact 4021 and the second contact 6021 can be kept in contact and connected.

[0061] The hydraulic thermostat in this embodiment further includes a linkage rod 16 and a linkage block 17. Through the linkage rod 16 and the linkage block 17, the linkage between the expansion bellows 9 and the third spring piece 14 can be achieved.

[0062] Referring to Figure 8 、 Figure 9As shown, the linkage rod 16 includes a hinge end 1601 and a linkage end 1602. The hinge end 1601 is rotatably connected to the housing via a rotating shaft, and the linkage end 1602 is capable of deflection. The linkage rod 16 passes between the first linkage plate 1501 and the second linkage plate 1502 of the linkage frame 15, and the linkage rod 16 and the second linkage plate 1502 are in contact with each other. The linkage end 1602 of the linkage rod 16 extends to a position opposite to the second end 902 of the expansion diaphragm box 9.

[0063] Reference Figure 8 , Figure 9 As shown, a linkage block 17 is fixedly connected to the outer side of the second end 902 of the expansion diaphragm box 9. The linkage block 17 has a clearance groove 1701, which allows the spring sheet 7 to pass through normally. A pressing part 1702 is formed on the side of the linkage block 17 away from the expansion diaphragm box 9. The pressing part 1702 can press against the linkage end 1602 of the linkage rod 16.

[0064] In the initial state, the second end 902 of the expansion diaphragm box 9 does not directly abut against the second spring plate 7, and there is a certain gap. The linkage end 1602 of the linkage block 17 remains in contact with the linkage end 1602 of the linkage rod 16, and the linkage rod 16 and the second linkage plate 1502 are also in contact with each other.

[0065] When the hydraulic temperature limiter is working, under normal circumstances, the temperature of the temperature sensing zone rises slowly. When the expansion diaphragm 9 initially contacts the temperature sensing expansion, the expansion diaphragm 9 will first drive the spring plate 14 to deform through the linkage rod 16 and the linkage block 17. After the spring plate 14 can bend and deform in the direction away from the contact 2 6021, when the temperature rises to A, the contact 1 4021 can be disconnected from the contact 2 6021.

[0066] At this time, the second end 902 of the expansion diaphragm box 9 is not pushed by the linkage rod 16, the second end 902 of the expansion diaphragm box 9 does not directly push the spring sheet 7, and the elastic moving part 8 does not deflect. If the temperature of the temperature sensing area gradually decreases, the expansion diaphragm box 9 will reset. At this time, the limiter can achieve the effect of automatic reset.

[0067] Then, if the temperature of the sensing zone rises further, when the temperature reaches B (B>A), the expansion diaphragm 9 expands further. At this time, the second end 902 of the expansion diaphragm 9 directly presses against and pushes the second spring plate 7, causing the second spring plate 7 to bend downwards. This causes the elastic moving part 8 to deflect, which can push the first spring plate 6 and the second contact 6021 to deflect away from the first contact 4021, thereby allowing the temperature limiter to be in the open state. At this time, even if the temperature drops further, the temperature limiter will not automatically reset. When it needs to be reset, it is necessary to manually press the reset part 13 to reset it.

[0068] When the hydraulic temperature limiter is working, if the temperature of the sensing zone rises too quickly, due to the delay in the action of the sensing bladder 11 and the hydraulic system, the temperature of the sensing zone may immediately rise to B. The movement of the second end 902 of the expansion diaphragm box 9 will eventually push the second spring plate 7, causing the second spring plate 7 to bend downwards. This causes the elastic moving part 8 to deflect, which can push the first spring plate 6 and the second contact 6021 to deflect away from the first contact 4021, thereby putting the temperature limiter in an open state. At this time, even if the temperature drops further, the temperature limiter will not automatically reset. When a reset is required, it is necessary to manually press the reset part 13 to achieve a reset.

[0069] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A hydraulic temperature limiter, characterized in that, The device includes a housing, terminal 1 (401), terminal 2 (402), metal sheet (5), spring sheet 1 (6), spring sheet 2 (7), elastic movable part (8), expansion diaphragm box (9), and reset part (13). Terminal 1 (401) and terminal 2 (402) are fixedly installed in the housing. The connecting end 1 (501) of the metal sheet (5) is fixedly connected to the housing and is conductive to terminal 1 (401). The connecting end 2 (502) of the metal sheet (5) is supported by a support part (101) inside the housing. The fixed end 1 (601) of the spring sheet 1 (6) is connected to the connecting end 2 (502) of the metal sheet (5). The elastic end 1 (601) of the spring sheet 1 (6) is connected to the connecting end 2 (502) of the metal sheet (5). 2) Extends toward terminal two (402); the fixed end two (701) of the spring sheet two (7) is connected to the connecting end two (502) of the metal sheet (5), and the elastic end two (702) of the spring sheet two (7) extends toward terminal two (402); the elastic movable member (8) is U-shaped and elastically snapped between the elastic end one (602) and the elastic end two (702); the expansion diaphragm box (9) and the reset member (13) are located on both sides of the spring sheet two (7), the expansion diaphragm box (9) can expand and push the spring sheet two (7) to shift toward terminal two (402), and the reset member (13) is used to push the spring sheet two (7) to reset; It also includes a spring plate three (14), a linkage frame (15), a linkage rod (16), and a linkage block (17). One end of the spring plate three (14) is fixedly connected to terminal two (402), and the other end is an elastic end three (1401). The side of the elastic end three (1401) facing away from the spring plate one (6) is fixedly connected to the linkage frame (15). The linkage rod (16) includes a hinge end (1601) and a linkage end (1602). The hinge end (1601) The linkage rod (16) is rotatably connected to the housing and passes through the linkage frame (15); the linkage block (17) is fixedly connected to the second end (902) of the expansion diaphragm box (9), and the pressing part (1702) of the linkage block (17) abuts against the linkage end (1602) of the linkage rod (16) to push the linkage rod (16) away from the spring plate (6) to deflect elastically; the linkage frame (15) can realize the linkage rod (16) and the spring plate (6) to be linked.

2. A hydraulic temperature limiter according to claim 1, characterized in that, The elastic end (602) of the spring sheet (6) is provided with contact point (6021); the elastic end (1401) of the spring sheet (14) is provided with contact point (4021); the linkage frame (15) is elastically pressed against the support spring (18) on the side opposite to contact point (6021).

3. A hydraulic temperature limiter according to claim 2, characterized in that, The linkage frame (15) includes a linkage plate one (1501) and a linkage plate two (1502) fixedly connected to each other. The linkage plate one (1501) is fixedly connected to the elastic end three (1401). The linkage rod (16) passes through the linkage plate one (1501) and the linkage plate two (1502) of the linkage frame (15), and the linkage rod (16) and the linkage plate two (1502) are in contact with each other.

4. A hydraulic temperature limiter according to claim 1, characterized in that, The expansion diaphragm box (9) has a first end (901) and a second end (902). The expansion diaphragm box (9) is located on the side of the second spring sheet (7) facing away from the third spring sheet (14), and the second end (902) is disposed facing the second spring sheet (7). In the initial state of the expansion diaphragm box (9), there is a gap between the second end (902) and the second spring sheet (7), and the second end (902) abuts against the linkage end (1602) of the linkage rod (16); The expansion diaphragm (9) expands, and the second end (902) gradually extends toward the second spring plate (7) until it abuts against the second spring plate (7). The second end (902) can push the second spring plate (7) to deflect.

5. A hydraulic temperature limiter according to claim 4, characterized in that, The spring sheet (6) has a first state and a second state. In the first state, the spring sheet (6) can elastically maintain the connection between the second contact (6021) and the first contact (4021). In the second state, the spring sheet (6) can deflect away from the first contact (4021), and the second contact (6021) and the first contact (4021) are disconnected.

6. A hydraulic temperature limiter according to claim 5, characterized in that, The expansion diaphragm (9) acts against the second spring sheet (7), which can elastically push the second spring sheet (7) to bend elastically. The elastic movable member (8) can deflect between the elastic end (602) of the first spring sheet (6) and the elastic end (702) of the second spring sheet (7). The elastic movable member (8) can elastically push the first spring sheet (6) to be in the second state.

7. A hydraulic temperature limiter according to claim 4, characterized in that, The expansion diaphragm box (9) is located on the side of the spring sheet two (7) away from the contact one (4021), and the reset member (13) and the contact one (4021) are located on the same side of the spring sheet two (7); the housing includes half shell one (1) and half shell two (2), a support plate (3) is fixedly installed inside the half shell one (1), and the expansion diaphragm box (9) is installed on the side of the support plate (3) away from the spring sheet two (7).

8. A hydraulic temperature limiter according to claim 7, characterized in that, The housing is threaded with an adjusting screw (12), which abuts against the second end (902) of the expansion diaphragm box (9); a spring (10) is installed on the side of the support plate (3) facing the expansion diaphragm box (9), and the spring (10) can elastically push the expansion diaphragm box (9) toward the second end (902).

9. A hydraulic temperature limiter according to claim 1, characterized in that, The first elastic end (602) is integrally connected to the first locking block (6022), and the second elastic end (702) is integrally connected to the second locking block (7021). The first locking block (6022) and the second locking block (7021) are arranged opposite to each other. The elastic movable member (8) includes a first movable end (801) and a second movable end (802). The first movable end (801) and the second movable end (802) are respectively provided with a locking groove (803). The elastic movable member (8) is located between the first locking block (6022) and the second locking block (7021). The first locking block (6022) and the second locking block (7021) are respectively locked into the locking grooves (803) of the first movable end (801) and the second movable end (802).

10. The hydraulic temperature limiter according to claim 9, characterized in that, The elastic movable member (8) is provided with a bending part (804) at both the first movable end (801) and the second movable end (802). The two bending parts (804) bend inward and are recessed on the north side. The two bending parts (804) can be engaged and limited with the first elastic end (602) and the second elastic end (702) respectively.

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