Oven temperature controller

Abstract

The utility model discloses an oven temperature controller comprising a porcelain core column which is provided with an upper lug plate, a first temperature sensing actuating mechanism, a second temperature sensing actuating mechanism and a lower lug plate. The upper lug plate is electrically connected with the upper side connecting end of the first temperature sensing action mechanism; the lower side connecting end of the first temperature sensing action mechanism is electrically connected with the upper side connecting end of the second temperature sensing action mechanism; the lower side connecting end of the second temperature sensing action mechanism is electrically connected with the lower lug plate; the first temperature sensing action mechanism comprises a first bimetallic strip for controlling the on-off connection of the first temperature sensing action mechanism, the second temperature sensing action mechanism comprises a second bimetallic strip for controlling the on-off connection of the second temperature sensing action mechanism, and the deformation temperature of the first bimetallic strip is different from that of the second bimetallic strip. Under the state that the bimetal at the conventional tripping temperature of the oven is insensitive or the temperature sensing action mechanism loses efficacy and is continuously heated, the other bimetal sheet is tripped off, and the high-temperature tripping heat preservation function is achieved.

Description

[Technical field]

[0001] The utility model relates to an oven temperature controller. [Background Technology]

[0002] When the set temperature is reached, the bimetallic strip of the existing oven thermostat will deform and trip, thereby disconnecting the electrical connection of the thermostat. However, after long-term use, the temperature sensing sensitivity of the bimetallic strip decreases or even fails, resulting in the thermostat being unable to cut off power and the oven continuing to heat, causing danger. [Contents of the utility model]

[0003] The utility model overcomes the shortcomings of the prior art and provides an oven temperature controller.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An oven temperature controller, characterized in that: it includes a porcelain core column, on which an upper wiring piece, a first temperature sensing action mechanism, a second temperature sensing action mechanism and a lower wiring piece are provided, and the upper wiring piece and the upper connecting end of the first temperature sensing action mechanism, the lower connecting end of the first temperature sensing action mechanism and the upper connecting end of the second temperature sensing action mechanism, and the lower connecting end of the second temperature sensing action mechanism and the lower wiring piece are electrically connected respectively, the first temperature sensing action mechanism includes a first bimetallic strip for controlling the on-off connection of the first temperature sensing action mechanism, the second temperature sensing action mechanism includes a second bimetallic strip for controlling the on-off connection of the second temperature sensing action mechanism, and the deformation temperature of the first bimetallic strip is different from the deformation temperature of the second bimetallic strip.

[0006] An oven temperature controller as described above is characterized in that: the first temperature sensing action mechanism also includes a first upper spring piece and a first fixed contact piece, the fixed end of the first upper spring piece and the upper wiring piece are integrally fixed on the porcelain core column, the first fixed contact piece is arranged at intervals on the porcelain core column below the first upper spring piece, the movable end of the first upper spring piece is provided with a first movable contact piece that cooperates with the first fixed contact piece, the fixed end of the first bimetallic strip is arranged on the porcelain core column below the first fixed contact piece and serves as the lower connecting end of the first temperature sensing action mechanism and is electrically connected to the upper connecting end of the second temperature sensing action mechanism, and a first linkage bolt is provided between the movable end of the first bimetallic strip and the movable end of the first upper spring piece.

[0007] An oven temperature controller as described above is characterized in that: the first moving contact piece is horizontally arranged between the first upper spring piece and the first fixed contact piece, one end of the first moving contact piece is riveted to the movable end of the first upper spring piece as a whole, the other end of the first moving contact piece is arranged above the first fixed contact piece and is arranged to be on and off matched with it, a first voltage regulating piece is arranged on the fixed end of the first upper spring piece, a first elastic spring piece is arranged between the movable end of the first voltage regulating piece and the other end of the first moving contact piece, a first pressure plate is horizontally arranged at the upper end of the porcelain core column, a first pressure regulator is arranged on the first pressure plate, and the voltage regulating terminal of the first pressure regulator is abutted and connected to the movable end of the first voltage regulating piece.

[0008] An oven thermostat as described above is characterized in that: the second temperature-sensing action mechanism also includes a second upper spring piece and a second fixed contact piece, the fixed end of the second upper spring piece is arranged on the porcelain core column and serves as the upper connecting end of the second temperature-sensing action mechanism and is electrically connected to the lower connecting end of the first temperature-sensing action mechanism, the second fixed contact piece is arranged on the porcelain core column below the second upper spring piece at intervals, the movable end of the second upper spring piece is provided with a second movable contact piece cooperating with the second fixed contact piece, the fixed end of the second bimetallic strip is integrally fixed to the porcelain core column with the lower wiring piece, and a second linkage bolt is provided between the movable end of the second bimetallic strip and the movable end of the second upper spring piece.

[0009] An oven temperature controller as described above is characterized in that: the second moving contact piece is horizontally arranged between the second upper spring piece and the second fixed contact piece, one end of the second moving contact piece is riveted to the movable end of the second upper spring piece to form a whole, the other end of the second moving contact piece is arranged above the second fixed contact piece and is arranged to be on and off matched with it, a second voltage regulating piece is arranged on the fixed end of the second upper spring piece, a second elastic spring piece is arranged between the movable end of the second voltage regulating piece and the other end of the second moving contact piece, a second pressure plate is horizontally arranged on the upper end of the porcelain core column, a second pressure regulator is arranged on the second pressure plate, and the voltage regulating terminal of the second pressure regulator is abutted and connected to the movable end of the second voltage regulating piece.

[0010] The beneficial effects of the utility model are:

[0011] The utility model arranges two temperature sensing action mechanisms which are electrically connected in series on a porcelain core column, and the deformation temperatures of the bimetallic strips on the two temperature sensing action mechanisms are different, wherein the deformation temperature of one of the bimetallic strips is the conventional tripping temperature of the oven, while the deformation temperature of the other bimetallic strip is greater than the conventional tripping temperature of the oven. Therefore, when the bimetal of the conventional tripping temperature of the oven is insensitive or the temperature sensing action mechanism fails and continues to heat, when the temperature of the continuous heating of the oven reaches the deformation temperature of the other bimetallic strip, the bimetallic strip deforms and trips to cut off the power of the temperature sensing action mechanism, thereby realizing the high-temperature tripping and heat preservation function. [Drawings]

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 It is the front view of the utility model;

[0014] Figure 3 It is a side view of the utility model. [Specific implementation method]

[0015] The technical solutions in the embodiments of the present utility model will be described clearly and completely below in conjunction with the accompanying drawings.

[0016] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. In addition, the descriptions of "preferred", "sub-preferred", etc. in the present invention are only used for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "preferred" or "sub-preferred" may explicitly or implicitly include at least one of the features.

[0017] like Figure 1-3 As shown, an oven thermostat includes a ceramic core column 1, on which an upper wiring piece 2, a first temperature sensing mechanism 3, a second temperature sensing mechanism 4 and a lower wiring piece 5 are provided, and the upper wiring piece 2 is electrically connected to the upper connecting end of the first temperature sensing mechanism 3, the lower connecting end of the first temperature sensing mechanism 3 and the upper connecting end of the second temperature sensing mechanism 4, and the lower connecting end of the second temperature sensing mechanism 4 and the lower wiring piece 5, respectively. The first temperature sensing mechanism 3 includes a first bimetallic strip 31 for controlling the on-off connection of the first temperature sensing mechanism 3, and the second temperature sensing mechanism 4 includes a second bimetallic strip 41 for controlling the on-off connection of the second temperature sensing mechanism 4. The deformation temperature of the first bimetallic strip 31 is different from the deformation temperature of the second bimetallic strip 41. In this case, the deformation temperature of one of the bimetallic strips is the normal tripping temperature of the oven, while the deformation temperature of the other bimetallic strip is greater than the normal tripping temperature of the oven.

[0018] In this example, the deformation temperature of the first bimetal 31 of the first temperature sensing mechanism 3 is taken as the normal tripping temperature of the oven, and the deformation temperature of the second bimetal 41 of the second temperature sensing mechanism 4 is greater than the normal tripping temperature of the oven. When in use, the ceramic core column 1 contacts the oven heating tube and conducts heat to the first temperature-sensing action mechanism 3 and the second temperature-sensing action mechanism 4. At this time, the temperature of the first bimetallic strip 31 of the first temperature-sensing action mechanism 3 and the second bimetallic strip 41 of the second temperature-sensing action mechanism 4 rises. When the oven temperature reaches the set temperature, the first bimetallic strip 31 of the first temperature-sensing action mechanism 3 deforms and trips to disconnect the first temperature-sensing action mechanism 3, and disconnects the electrical connection between the upper wiring piece 2 and the lower wiring piece 5, thereby cutting off the power to the oven; when the first temperature-sensing action mechanism 3 fails, the oven temperature continues to heat after reaching the set tripping temperature. When the continuous heating causes the temperature to reach the deformation temperature of the second bimetallic strip 41, the second bimetallic strip 41 deforms and trips to disconnect the second temperature-sensing action mechanism 4, and disconnects the electrical connection between the upper wiring piece 2 and the lower wiring piece 5, thereby cutting off the power to the oven, thereby playing a high-temperature protection function for the oven in the event of failure of the first temperature-sensing action mechanism 3.

[0019] like Figure 1-3 As shown, the first temperature-sensing action mechanism 3 also includes a first upper spring piece 32 and a first fixed contact piece 33. The fixed end of the first upper spring piece 32 is integrally fixed to the porcelain core column 1 with the upper wiring piece 2. The first fixed contact piece 33 is arranged at intervals on the porcelain core column 1 below the first upper spring piece 32. The movable end of the first upper spring piece 32 is provided with a first movable contact piece 34 that cooperates with the first fixed contact piece 33. The fixed end of the first bimetallic strip 31 is arranged on the porcelain core column 1 below the first fixed contact piece 33 and serves as the lower connecting end of the first temperature-sensing action mechanism 3 and is electrically connected to the upper connecting end of the second temperature-sensing action mechanism 4. A first linkage bolt 35 is provided between the movable end of the first bimetallic strip 31 and the movable end of the first upper spring piece 32. Under normal conditions, the first fixed contact piece 33 and the first movable contact piece 34 are in a state of resistive electrical connection. When the oven temperature reaches the deformation temperature of the first bimetallic strip 31, the first bimetallic strip 31 is deformed and drives the first movable contact piece 34 to move upward through the first linkage bolt 35, so that the first fixed contact piece 33 is separated from the first movable contact piece 34, and the first temperature sensing action mechanism 3 is disconnected; after the temperature drops, the first bimetallic strip 31 is reset to restore the state of resistive electrical connection between the first fixed contact piece 33 and the first movable contact piece 34.

[0020] like Figure 1-3As shown, the first movable contact piece 34 is transversely arranged between the first upper spring piece 32 and the first fixed contact piece 33, one end of the first movable contact piece 34 is riveted to the movable end of the first upper spring piece 32 as a whole, the other end of the first movable contact piece 34 is arranged above the first fixed contact piece 33 and is arranged in an on-off manner with the first upper spring piece 32, a first voltage regulating piece 36 is arranged on the fixed end of the first upper spring piece 32, a first elastic spring piece 37 is arranged between the movable end of the first voltage regulating piece 36 and the other end of the first movable contact piece 34, a first pressing plate 61 is transversely arranged at the upper end of the porcelain core column 1, a first pressure regulator 62 is arranged on the first pressing plate 61, and the voltage regulating terminal of the first pressure regulator 62 is abutted and connected to the movable end of the first voltage regulating piece 36. By adjusting the relative position of the voltage regulating terminal of the first pressure regulator 62 and the first voltage regulating piece 36, the required deformation amount of the first bimetallic strip 31 to separate the first fixed contact piece 33 from the first movable contact piece 34 is changed, so as to adjust the tripping temperature of the oven.

[0021] like Figure 1-3 As shown, the second temperature-sensing actuating mechanism 4 also includes a second upper spring piece 42 and a second fixed contact piece 43. The fixed end of the second upper spring piece 42 is arranged on the porcelain core column 1 and serves as the upper connecting end of the second temperature-sensing actuating mechanism 4 and is electrically connected to the lower connecting end of the first temperature-sensing actuating mechanism 3. The second fixed contact piece 43 is arranged at intervals on the porcelain core column 1 below the second upper spring piece 42. The movable end of the second upper spring piece 42 is provided with a second movable contact piece 44 that cooperates with the second fixed contact piece 43. The fixed end of the second bimetallic strip 41 is integrally fixed to the porcelain core column 1 with the lower wiring piece 5. A second linkage bolt 45 is provided between the movable end of the second bimetallic strip 41 and the movable end of the second upper spring piece 42. Similarly, under normal conditions, the second fixed contact piece 43 and the second movable contact piece 44 are in a state of resistive electrical connection. When the oven temperature reaches the deformation temperature of the second bimetallic strip 41, the second bimetallic strip 41 is deformed and drives the second movable contact piece 44 to move upward through the second linkage bolt 45, so that the second fixed contact piece 43 is separated from the second movable contact piece 44, and the second temperature sensing action mechanism 4 is disconnected; after the temperature drops, the second bimetallic strip 41 is reset to restore the second fixed contact piece 43 and the second movable contact piece 44 to the state of resistive electrical connection.

[0022] like Figure 1-3As shown, the second movable contact piece 44 is transversely arranged between the second upper spring piece 42 and the second fixed contact piece 43, one end of the second movable contact piece 44 is riveted to the movable end of the second upper spring piece 42 as a whole, the other end of the second movable contact piece 44 is arranged above the second fixed contact piece 43 and is arranged in an on-off manner with the second upper spring piece 42, a second voltage regulating piece 46 is arranged on the fixed end of the second upper spring piece 42, a second elastic spring piece 47 is arranged between the movable end of the second voltage regulating piece 46 and the other end of the second movable contact piece 44, a second pressing plate 71 is transversely arranged on the upper end of the porcelain core column 1, a second pressure regulator 72 is arranged on the second pressing plate 71, and the voltage regulating terminal of the second pressure regulator 72 is abutted and connected to the movable end of the second voltage regulating piece 46. Similarly, by adjusting the relative position of the voltage regulating terminal of the second pressure regulator 72 and the second voltage regulating piece 46, the required deformation amount of the second bimetallic strip 41 to separate the second fixed contact piece 43 from the second movable contact piece 44 is changed, so as to adjust the temperature of the oven to realize the high temperature protection tripping function when the first temperature action mechanism 3 fails.

[0023] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention specification and drawings under the utility model concept, or directly or indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An oven thermostat, characterized in that: The invention comprises a ceramic core column (1), on which an upper connecting piece (2), a first temperature sensing actuation mechanism (3), a second temperature sensing actuation mechanism (4) and a lower connecting piece (5) are arranged, and the upper connecting piece (2) and the upper connecting end of the first temperature sensing actuation mechanism (3), the lower connecting end of the first temperature sensing actuation mechanism (3) and the upper connecting end of the second temperature sensing actuation mechanism (4), and the lower connecting end of the second temperature sensing actuation mechanism (4) and the lower connecting piece (5) are electrically connected respectively. The first temperature sensing actuation mechanism (3) comprises a first bimetallic strip (31) for controlling the on-off connection of the first temperature sensing actuation mechanism (3), and the second temperature sensing actuation mechanism (4) comprises a second bimetallic strip (41) for controlling the on-off connection of the second temperature sensing actuation mechanism (4). The deformation temperature of the first bimetallic strip (31) is different from the deformation temperature of the second bimetallic strip (41).

2. An oven thermostat according to claim 1, characterized in that: The first temperature sensing actuation mechanism (3) further comprises a first upper spring piece (32) and a first fixed contact piece (33); the fixed end of the first upper spring piece (32) and the upper connecting piece (2) are integrally fixedly arranged on the porcelain core column (1); the first fixed contact piece (33) is arranged at intervals on the porcelain core column (1) below the first upper spring piece (32); a first movable contact piece (34) cooperating with the first fixed contact piece (33) is arranged on the movable end of the first upper spring piece (32); the fixed end of the first bimetallic strip (31) is arranged on the porcelain core column (1) below the first fixed contact piece (33) and serves as a lower connecting end of the first temperature sensing actuation mechanism (3) and is electrically connected to an upper connecting end of the second temperature sensing actuation mechanism (4); a first linkage bolt (35) is arranged between the movable end of the first bimetallic strip (31) and the movable end of the first upper spring piece (32).

3. An oven thermostat according to claim 2, characterized in that: The first movable contact piece (34) is transversely arranged between the first upper spring piece (32) and the first fixed contact piece (33); one end of the first movable contact piece (34) is riveted to the movable end of the first upper spring piece (32) to form a whole; the other end of the first movable contact piece (34) is arranged above the first fixed contact piece (33) and is arranged to be on and off matched with the first fixed contact piece (33); a first voltage regulating piece (36) is arranged on the fixed end of the first upper spring piece (32); a first elastic spring piece (37) is arranged between the movable end of the first voltage regulating piece (36) and the other end of the first movable contact piece (34); a first pressure plate (61) is transversely arranged at the upper end of the porcelain core column (1); a first pressure regulator (62) is arranged on the first pressure plate (61); and a voltage regulating terminal of the first pressure regulator (62) is contact-connected to the movable end of the first voltage regulating piece (36).

4. The oven thermostat according to claim 1, characterized in that: The second temperature sensing actuation mechanism (4) further comprises a second upper spring piece (42) and a second fixed contact piece (43); the fixed end of the second upper spring piece (42) is arranged on the porcelain core column (1) and serves as the upper connecting end of the second temperature sensing actuation mechanism (4) and is electrically connected to the lower connecting end of the first temperature sensing actuation mechanism (3); the second fixed contact piece (43) is arranged at intervals on the porcelain core column (1) below the second upper spring piece (42); a second movable contact piece (44) cooperating with the second fixed contact piece (43) is arranged on the movable end of the second upper spring piece (42); the fixed end of the second bimetallic strip (41) and the lower connecting piece (5) are integrally fixed on the porcelain core column (1); and a second linkage bolt (45) is arranged between the movable end of the second bimetallic strip (41) and the movable end of the second upper spring piece (42).

5. An oven thermostat according to claim 4, characterized in that: The second movable contact piece (44) is transversely arranged between the second upper spring piece (42) and the second fixed contact piece (43); one end of the second movable contact piece (44) is riveted to the movable end of the second upper spring piece (42) to form a whole; the other end of the second movable contact piece (44) is arranged above the second fixed contact piece (43) and is arranged to be on and off matched with the second fixed contact piece (43); a second voltage regulating piece (46) is arranged on the fixed end of the second upper spring piece (42); a second elastic spring piece (47) is arranged between the movable end of the second voltage regulating piece (46) and the other end of the second movable contact piece (44); a second pressure plate (71) is transversely arranged at the upper end of the porcelain core column (1); a second pressure regulator (72) is arranged on the second pressure plate (71); and a voltage regulating terminal of the second pressure regulator (72) is butt-connected to the movable end of the second voltage regulating piece (46).

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