Two-phase temperature controller

Abstract

The utility model provides a two-phase temperature controller, and relates to the technical field of temperature controllers, in order to solve the problem of poor contact stability of a moving contact of a kick type temperature controller in the prior art, the two-phase temperature controller comprises a shell, a bimetallic strip, an ejector rod assembly and two contact groups, the bimetallic strip is arranged at the bottom side of the shell, and the ejector rod assembly is arranged at the bottom side of the shell. Two groups of mounting grooves arranged side by side are formed in the top of the shell, the two contact groups are respectively mounted in the mounting grooves, each contact group comprises a movable contact, a first terminal and a second terminal, one end of the ejector rod assembly is propped against the bimetallic strip, and the other end of the ejector rod assembly is propped against the movable contacts of the two contact groups; one end of the movable contact piece is connected with the first terminal, the other end of the movable contact piece is provided with a movable contact, one end of the second terminal close to the movable contact piece is provided with a static contact, the movable contact can abut against the static contact, and the diameter of the static contact and the diameter of the movable contact range from 5mm to 7mm. The load capacity of the two-phase temperature controller is improved by increasing the contact area of the static contact and the movable contact, so that the performance of the two-phase temperature controller is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature controllers, in particular to a two-phase temperature controller. Background Art

[0002] A thermostat is a commonly used automatic control component that physically deforms in response to ambient temperature changes, switching the device on or off. It is commonly used inside electrically heated containers such as electric kettles and coffee makers. Snap-action thermostats often use a bimetallic strip as the deformation element. Thermostats use pressure to open and close contacts, controlling whether the device will stop or start operating when a certain temperature is reached.

[0003] The diameter of the moving contact of the snap-action thermostat currently on the market is small, the current it can carry is not high, the reliability and stability are low, and the product performance is not high. Utility Model Content

[0004] The purpose of the present utility model is to provide a two-phase thermostat to solve the problem of poor contact stability of the moving contact piece of the prior art jump-type thermostat. The two-phase thermostat of the present utility model increases the contact area between the static contact and the moving contact to increase the load capacity of the two-phase thermostat, thereby improving the performance of the two-phase thermostat.

[0005] The utility model provides a two-phase temperature controller, including a shell, a bimetallic strip, a push rod assembly and two groups of contact groups, the bimetallic strip is arranged on the bottom side of the shell, and two groups of mounting grooves arranged side by side are provided on the top of the shell, and the two groups of contact groups are respectively installed in the mounting grooves, the contact group includes a movable contact, a first terminal and a second terminal, one end of the push rod assembly abuts against the bimetallic strip and the other end abuts against the movable contacts of the two groups of contact groups, the movable contact is arranged between the first terminal and the second terminal, and one end of the movable contact is connected to the first terminal and the other end is provided with a movable contact, and a static contact is provided on one end of the second terminal close to the movable contact, the movable contact can abut against the static contact, and the diameter range of the static contact and the movable contact is 5 mm-7 mm.

[0006] As a preferred solution of the present invention, a middle groove and two side grooves are respectively provided on the lower side of the mounting groove, the middle groove is provided in the middle of the two side grooves, the first terminal and the second terminal are respectively connected to the upper sides of the two side grooves, and the moving contact piece is connected to the upper side of the middle groove.

[0007] As a preferred solution of the present invention, limiting plates are respectively arranged in the two middle grooves, the two limiting plates are arranged opposite to each other on the same plane, limiting notches are respectively arranged on the sides of the two limiting plates that are close to each other, a guide hole is provided in the middle of the shell, and a transverse groove connecting the two middle grooves is provided on the upper side of the guide hole, the transverse groove is correspondingly arranged between the two limiting plates, and the push rod assembly is arranged through the guide hole.

[0008] As a preferred solution of the present invention, the push rod assembly includes a reset push rod and a porcelain rod, the porcelain rod is vertically arranged on the lower side of the reset push rod, the porcelain rod is passed through the guide hole, the reset push rod is arranged across the transverse groove and its two ends are arranged on the limiting notches of the two limiting plates.

[0009] As a preferred solution of the present invention, the lengths of the two ends of the reset push rod extending into the two middle grooves are respectively greater than half of the width of the middle grooves.

[0010] As a preferred solution of the present invention, a downwardly opening accommodating groove is provided on the bottom side of the shell, the accommodating groove is located below the guide hole and communicated with the guide hole, and the bimetallic strip is arranged in the accommodating groove.

[0011] As a preferred solution of the present invention, it further includes a lower cover body, which is connected to the lower side of the shell and closes the accommodating groove. The bimetallic strip can contact the lower cover body, and connecting pieces are respectively provided on both sides of the lower cover body.

[0012] As a preferred solution of the present invention, it further comprises an upper cover body, which is connected to the upper side of the housing and is limited to the upper side of the two moving contact pieces.

[0013] As a preferred solution of the present invention, a reset button is connected to the upper side of the reset push rod, and the reset button extends to the upper side of the upper cover body.

[0014] Compared with the prior art, the present invention has the following positive effects:

[0015] The two-phase temperature controller provided by the utility model includes a shell, a bimetallic strip, a push rod assembly and two groups of contact groups. The bimetallic strip is arranged on the bottom side of the shell, and two groups of mounting grooves arranged side by side are provided on the top of the shell. The two groups of contact groups are respectively installed in the mounting grooves. The contact group includes a movable contact, a first terminal and a second terminal. One end of the push rod assembly abuts against the bimetallic strip and the other end abuts against the movable contacts of the two groups of contact groups. The movable contact is arranged between the first terminal and the second terminal and one end of the movable contact is connected to the first terminal and a movable contact is provided on the other end. A static contact is provided on the end of the second terminal close to the movable contact. The movable contact can abut against the static contact. The diameter range of the static contact and the movable contact is 5 mm-7 mm. In the two-phase thermostat of the present invention, a static contact is provided on one end of the second terminal close to the first terminal, and a moving contact is provided on one end of the reed close to the second terminal. The static contact and the moving contact can offset each other, and the diameter range of the static contact and the moving contact is 5 mm-7 mm. By increasing the contact area between the static contact and the moving contact, the load capacity of the two-phase thermostat is increased, thereby improving the performance of the two-phase thermostat. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic structural diagram of a two-phase temperature controller of the present invention;

[0018] Figure 2 This is an exploded view of the two-phase thermostat of the present invention from the first perspective;

[0019] Figure 3 This is an exploded view of the two-phase thermostat of the present invention from a second perspective;

[0020] Figure 4 It is a top view of the two-phase thermostat of the utility model;

[0021] Figure 5 for Figure 4 Cross-sectional view of middle AA;

[0022] Figure 6 for Figure 4 Cross-section of the middle BB;

[0023] Figure 7 This is a positional structural diagram of the push rod assembly, contact piece group, and bimetallic strip of the present utility model;

[0024] Figure 8This is a schematic diagram of the contact assembly of the present invention when it is installed on the housing;

[0025] Figure 9 This is a schematic diagram of the contact piece group and the ejector assembly in the present invention when they are separated from the housing.

[0026] In the figure: 1. Shell; 11. Mounting slot; 111. Side slot; 112. Middle slot; 113. Limiting plate; 114. Limiting notch; 12. Horizontal slot; 13. Guide hole; 14. Accommodating slot; 2. Lower cover; 21. Connecting piece; 3. Upper cover; 4. Contact piece group; 41. First terminal; 42. Moving contact piece; 43. Second terminal; 44. Moving contact; 45. Static contact; 5. Push rod assembly; 51. Porcelain rod; 52. Reset push rod; 53. Reset button; 6. Bimetallic strip. DETAILED DESCRIPTION

[0027] In the description of the present invention, it should be noted that, unless otherwise specified, "plurality" means two or more; the terms "upper," "lower," "front," "back," "left," "right," "top," "bottom," "inner," "outer," "front end," "back end," "head," "tail," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be construed as limiting the present invention. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model depending on the specific circumstances.

[0029] The specific implementation of the present invention will be further described in detail below with reference to the accompanying drawings.

[0030] Example 1:

[0031] This embodiment provides a two-phase temperature controller, such as Figures 1-9 As shown, it includes a housing 1, a bimetallic strip 6, a push rod assembly 5 and two groups of contact pieces 4.

[0032] The bimetallic strip 6 is disposed on the bottom side of the housing 1. Two sets of mounting grooves 11 are provided on the top of the housing 1. The two sets of contact groups 4 are respectively installed in the mounting grooves 11. The mounting grooves 11 are used to install and fix the bimetallic strip 6 to prevent the two sets of contact groups 4 from interfering with each other.

[0033] The contact group 4 includes a movable contact 42 , a first terminal 41 and a second terminal 43 . The movable contact 42 itself has a certain elasticity and can be an elastic copper sheet.

[0034] One end of the top rod assembly 5 is in contact with the bimetallic strip and the other end is in contact with the movable contact 42 of the two groups of contact groups 4. The movable contact 42 is arranged between the first terminal 41 and the second terminal 43 and one end of the movable contact 42 is connected to the first terminal 41 and the other end is provided with a movable contact 44. A static contact 45 is provided on the end of the second terminal 43 close to the movable contact 42, and the movable contact 44 can be in contact with the static contact 45.

[0035] The moving contact 44 of the moving contact piece 42 is pressed against the static contact 45 of the second terminal 43 before the push rod assembly 5 is pressed and the bimetallic strip 6 has not moved, thereby realizing the conduction of the circuit. After the bimetallic strip 6 moves and supports the push rod assembly 5, the moving contact 44 of the moving contact piece 42 is separated from the static contact 45 of the second terminal 43, and the circuit is disconnected.

[0036] The diameter of the static contact and the movable contact 44 ranges from 5 mm to 7 mm. Specifically, the diameter of the static contact and the movable contact 44 can be 5 mm, 6 mm, or 7 mm.

[0037] In the two-phase thermostat of this embodiment, a static contact 45 is provided on the end of the second terminal 43 close to the first terminal 41, and a moving contact 44 is provided on the end of the reed 6 close to the second terminal 43. The static contact 45 and the moving contact 44 can offset each other. The diameters of the static contact 45 and the moving contact 44 range from 5 mm to 7 mm. By increasing the contact area between the static contact 45 and the moving contact 44, the load capacity of the two-phase thermostat is increased, thereby improving the performance of the two-phase thermostat.

[0038] As a preferred embodiment, Figure 9 As shown, the lower side of the mounting groove 11 is provided with a middle groove 112 and two side grooves 111. The middle groove 112 is provided between the two side grooves 111, and the length of the middle groove 112 is greater than the length of the side grooves 111. The two side grooves 111 provide space for connecting the first terminal 41 and the second terminal 43, and the middle groove 112 provides space for the movement of the ejector assembly 5.

[0039] The first terminal 41 and the second terminal 43 are connected to the upper sides of the two side grooves 111, and the movable contact piece 42 is connected to the upper side of the middle groove 112. The first terminal 41, the second terminal 43 and the movable contact piece 42 are connected to the housing 1 by rivets.

[0040] As a preferred embodiment, Figure 9 As shown, a limit plate 113 is disposed within each of the two intermediate slots 112. The two limit plates 113 are arranged opposite each other on the same plane, and a limit notch 114 is provided on the closer side of each limit plate 113. A guide hole 13 is provided in the center of the housing 1. A transverse groove 12 is provided above the guide hole 13, connecting the two intermediate slots 112. The transverse groove 12 is disposed between the two limit plates 113. The ejector assembly 5 is inserted through the guide hole 13. The guide hole 13 provides guidance for the vertical movement of the ejector assembly 5.

[0041] As a preferred embodiment, the ejector assembly 5 includes a reset push rod 52 and a porcelain rod 51 , and the porcelain rod 51 is vertically arranged on the lower side of the reset push rod 52 .

[0042] The porcelain rod 51 is inserted into the guide hole 13, and the reset push rod 52 is arranged across the transverse groove 12 and its two ends are arranged on the limiting notches 114 of the two limiting plates 113. The transverse groove 12 and the limiting notch 114 play a guiding and limiting role in the movement of the reset push rod 52.

[0043] As a preferred embodiment, the lengths of the two ends of the reset push rod 52 extending into the two middle grooves 112 are greater than half the width of the middle grooves 112 , so that the two movable contact pieces 42 can be pushed simultaneously by one reset push rod 52 .

[0044] As a preferred embodiment, Figure 3 As shown, a downwardly opening receiving groove 14 is provided on the bottom side of the housing 1. The receiving groove 14 is located below and communicates with the guide hole 13, and the bimetallic strip 6 is disposed in the receiving groove 14. As a preferred embodiment, the two-phase thermostat of this embodiment further includes a lower cover 2, which is connected to the bottom side of the housing 1 and encloses the receiving groove 14. The bimetallic strip 6 can contact the lower cover to facilitate heat conduction.

[0045] Connecting pieces 21 are provided on both sides of the lower cover 2. The connecting pieces 21 are used to connect to the temperature control element. The lower cover can be a metal shell for heat conduction.

[0046] The bimetallic strip 6 can be arranged in the middle of the lower cover, and the porcelain rod 51 abuts against the center of the bimetallic strip 6 .

[0047] As a preferred embodiment, the two-phase thermostat of this embodiment further includes an upper cover 3, which is connected to the upper side of the housing 1 and is located above the two moving contacts 42. The upper cover 3 can be made of plastic and can be riveted to the housing 1.

[0048] As a preferred embodiment, a reset button 53 is connected to the upper side of the reset push rod 52, and the reset button 53 extends to the upper side of the upper cover 3. By pressing the reset button 53, the porcelain rod 51 can be indirectly pushed to push the bimetallic strip 6 back to its original position.

[0049] When the two-phase thermostat of this embodiment is in use, at room temperature, the bimetallic strip 6 is in its initial reset state, with the moving and stationary contacts in contact and the circuit continuous. When the heating resistor is de-energized and the temperature-sensitive lower cover senses that the ambient operating temperature has risen to the upper temperature limit of the bimetallic strip 6, the bimetallic strip 6 snaps, pushing the push rod assembly 5 upward. The reset push rod 52 pushes the moving contact 42 upward, separating the moving and stationary contacts, disconnecting the first and second terminals, and interrupting the circuit. When the temperature drops, the bimetallic strip snaps again, returning to its initial state. The reset push rod 52 moves downward under its own weight. The moving contact 42 simultaneously drops, causing the moving and stationary contacts to reclose and the circuit to reconnect.

[0050] The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field can make several modifications and improvements without departing from the creative concept of the present invention, which should be included in the scope of protection of the present invention.

Claims

1. A two-phase thermostat, characterized in that: The invention comprises a housing (1), a bimetallic sheet (6), a top rod assembly (5) and two groups of contact sheet assemblies (4), wherein the bimetallic sheet is arranged on the bottom side of the housing (1), and two groups of mounting grooves (11) arranged side by side are arranged on the top of the housing (1), and the two groups of contact sheet assemblies (4) are respectively installed in the mounting grooves (11), and the contact sheet assemblies (4) include a movable contact sheet (42), a first terminal (41) and a second terminal (43), and one end of the top rod assembly (5) is in contact with the bimetallic sheet (6) and the other end is in contact with the two groups of contact sheets. The movable contact pieces (42) of the group (4) are in contact with each other, the movable contact piece (42) is arranged between the first terminal (41) and the second terminal (43), one end of the movable contact piece (42) is connected to the first terminal (41), and a movable contact point (44) is arranged on the other end, and a static contact point (45) is arranged on the end of the second terminal (43) close to the movable contact piece (42), the movable contact point (44) can be in contact with the static contact point (45), and the diameter range of the static contact point (45) and the movable contact (44) is 5 mm-7 mm.

2. A two-phase temperature controller according to claim 1, characterized in that: A middle groove (112) and two side grooves (111) are respectively provided on the lower side of the mounting groove (11), the middle groove (112) is provided between the two side grooves (111), the first terminal (41) and the second terminal (43) are respectively connected to the upper sides of the two side grooves (111), and the movable contact piece (42) is connected to the upper side of the middle groove (112).

3. A two-phase temperature controller according to claim 2, characterized in that: A limiting plate (113) is respectively provided in the two intermediate grooves (112), and the two limiting plates (113) are arranged opposite to each other on the same plane. A limiting notch (114) is respectively provided on the side of the two limiting plates (113) that are close to each other. A guide hole (13) is provided in the middle of the shell (1), and a transverse groove (12) connecting the two intermediate grooves (112) is provided on the upper side of the guide hole (13). The transverse groove (12) is correspondingly provided between the two limiting plates (113), and the push rod assembly (5) is provided through the guide hole (13).

4. A two-phase temperature controller according to claim 3, characterized in that: The push rod assembly (5) includes a reset push rod (52) and a porcelain rod (51), wherein the porcelain rod (51) is vertically arranged on the lower side of the reset push rod (52), and the porcelain rod (51) is passed through the guide hole (13). The reset push rod (52) is arranged to cross the transverse groove (12) and its two ends are arranged on the limiting notches (114) of the two limiting plates (113).

5. A two-phase temperature controller according to claim 4, characterized in that: The lengths of the two ends of the reset push rod (52) extending into the two middle grooves (112) are greater than half the width of the middle groove (112).

6. A two-phase temperature controller according to claim 3, characterized in that: A downwardly opening accommodating groove (14) is provided on the bottom side of the housing (1), the accommodating groove (14) is located below the guide hole (13) and communicates with the guide hole (13), and the bimetallic strip is arranged in the accommodating groove (14).

7. A two-phase temperature controller according to claim 6, characterized in that: It also includes a lower cover (2), which is connected to the lower side of the shell (1) and closes the accommodating groove (14). The bimetallic strip can contact the lower cover, and connecting strips (21) are respectively provided on both sides of the lower cover (2).

8. The two-phase temperature controller according to claim 4, characterized in that: It also includes an upper cover (3), which is connected to the upper side of the housing (1) and is located on the upper side of the two moving contact pieces (42).

9. A two-phase temperature controller according to claim 8, characterized in that: A reset button (53) is connected to the upper side of the reset push rod (52), and the reset button (53) extends to the upper side of the upper cover body (3).

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