Temperature controller for food processer

Abstract

The scheme provides a temperature controller for a food processor, the center of the temperature controller is provided with a through channel for an output shaft of a motor or a motor to pass through, the temperature controller comprises a shell and a metal fixing plate matched with the shell, the center of the shell and the center of the fixing plate are respectively provided with a center through hole forming the through channel, the shell is provided with a containing cavity along the outer ring of the center through hole, and the containing cavity is provided with a through hole. A cover plate partially covering the containing cavity is arranged between the containing cavity and the fixing plate, a first contact switch and a second contact switch for overheat insurance are arranged on the two sides of the center through hole in the containing cavity respectively, and grounding terminals for grounding are arranged at the positions, away from the first contact switch and the second contact switch, of the fixing plate. And a large-aperture through channel hole site is reserved for the motor or the motor output shaft, so that the whole machine is simpler, more convenient and more reasonable to assemble. The grounding terminal for grounding is integrated through the metal fixing plate, so that the design limitation of the grounding ring is broken, and the cost and the internal space are greatly saved.

Description

Technical Field

[0001] The utility model relates to a temperature control connector for a cooking machine. Background Art

[0002] A food cooking machine, including a soymilk machine, is a device that uses a high-speed motor to drive a blade to perform ultra-high-speed cutting, stirring, and heating on the ingredients in the cup body, and is used for cooking that requires cutting, stirring, and heating at the same time, such as: soymilk, medicinal soup, etc. In order to cooperate with the normal operation of the above functions, the existing food cooking machines generally install functional components separately. During the later assembly process, there are many installation links, which is very inconvenient, error-prone, occupies a large space position, and affects the overall aesthetic appearance. Moreover, when the heating control circuit of the existing food cooking machine fails, the wire circuit cannot be disconnected, that is, it does not have the function of preventing dry burning. For safety considerations, some food cooking machines will set a fuse to cut off the heating main circuit for protection; some fuses are in contact with the temperature control part to indirectly obtain the temperature value of the heater. The contact surface size and the flatness of the contact both affect the accuracy of the obtained temperature value. For a cooking machine, grounding is generally electrically connected to the ground wire output terminal through a sixth conductive ring. In this structure, the sixth conductive ring is arranged in the outermost circle and has the largest diameter. Therefore, the most metal raw materials are required to produce the sixth conductive ring, and the production cost is the highest. However, this conductive ring is only suitable for connecting the ground wire, which will cause waste. Summary of the Invention

[0003] The utility model provides a temperature controller for a cooking machine with high stability, good safety, high sensitivity, reasonable integrated layout, and convenient installation.

[0004] To solve the above technical problems, the utility model adopts the following technical solutions: A temperature controller for a cooking machine has a through channel in the center for the motor or the motor output shaft to pass through, and includes a housing and a fixing plate made of metal and adapted to the housing. The housing and the fixing plate are respectively provided with a central through hole forming the through channel at the center. The housing is provided with a receiving cavity along the outer circle of the central through hole. A cover plate that partially covers the receiving cavity is provided between the receiving cavity and the fixing plate. A first contact switch and a second contact switch for an overheat fuse are respectively arranged on both sides of the central through hole in the receiving cavity. The first contact switch cooperates with a bimetallic thermal actuator installed on the fixing plate to achieve over-temperature protection. A grounding terminal for grounding is provided at a position on the fixing plate away from the first contact switch and the second contact switch.

[0005] As an improvement: A through hole for the grounding terminal to pass through is provided on the outer wall of the receiving cavity of the housing. The grounding terminal is bent downward from the fixing plate, and the free end of the grounding terminal passes through the through hole to form a grounding connection terminal outside.

[0006] As an improvement: the fixing plate is also connected to a support arm for installing the NTC, and the end of the support arm is a "U"-shaped bayonet, through which the NTC is side-entry-connected to the fixing plate.

[0007] As an improvement: the second contact switch includes a second static contact arm with a second static contact, a second moving contact arm, a fuse top rod, and a second limit hole for supporting and limiting the fuse top rod on the cover plate. The fuse top rod is an insulating fusible plastic part with a fixed melting point and integrally formed. The movable end of the second moving contact arm has a contact that matches the second static contact. The fixed plate is provided with a second through hole for the fuse top rod to pass through. The fuse top rod passes through the second through hole and the second limit hole and is erected between the second moving contact arm and the heating element at the bottom of the container. The moving contact arm is supported and pressed by the over-temperature protection top rod to be electrically contacted with the static contact and is normally closed. When the heating element overheats and exceeds the fixed melting point temperature of the over-temperature protection top rod and the temperature control fails, the over-temperature protection top rod self-fuses to reduce its height, the moving contact arm loses the pressure support and jumps up, and the moving contact arm disconnects the electrical contact with the static contact to achieve the over-temperature insurance function.

[0008] As an improvement: the first contact switch comprises a first static contact, a first moving contact arm, an auxiliary porcelain rod, and the cover plate is provided with a first limiting hole for supporting the auxiliary porcelain rod. The movable end of the first moving contact arm is placed below the bimetallic thermistor actuator sheet, and the movable end of the first moving contact arm is provided with a contact that can cooperate with the first static contact. The auxiliary porcelain rod passes through the first limiting hole of the cover plate and stands upright between the first moving contact arm and the bimetallic thermistor actuator sheet. When the first contact switch is actuated, that is, the bimetallic thermistor actuator sheet drives the auxiliary porcelain rod to move downward in linkage, the movable end of the first moving contact arm jumps down under the action of the auxiliary porcelain rod, so that the contact on the first moving contact arm is disengaged from the first static contact, thereby achieving over-temperature protection.

[0009] The beneficial effects provided by the present utility model are as follows: The temperature controller has reserved a through-channel hole with a large aperture for the motor or the output shaft of the motor, making the overall assembly of the machine more convenient and reasonable. The through-channel is separated from the accommodating cavity of the electrical connection cavity by a partition wall, having a certain isolation, waterproofing, and anti-overflow effect, and playing a good protective role for the contact switch in the accommodating cavity. The present utility model integrates a grounding terminal for grounding through a metal fixing plate, breaking through the design limitations of the grounding ring, greatly saving costs and internal space. Furthermore, the accommodating cavity of the electrical connection cavity is provided with a first contact switch for over-temperature protection and a second contact switch for overheat insurance. The second contact switch adopts a self-fusing insurance device combined with a contact switch. Since the top of the insurance ejector rod directly contacts the heating element to obtain heat data, without intermediate elements and data decay, compared with the existing method of indirectly obtaining temperature data, the solution of the present utility model senses temperature more accurately, has strong sensitivity, stronger anti-interference and stability, and lower costs. The overall structure is simple and can be applied to existing temperature-sensitive controllers for electric tea sets. Moreover, since the insurance ejector rod is integrally formed, the processing process steps and time of the temperature controller are shortened, the processing difficulty and cost are also reduced, and the accuracy and stability of the temperature controller can be well guaranteed.

[0010] The following further details the present utility model in conjunction with the accompanying drawings and embodiments. Description of the Drawings

[0011] Figure 1 is a schematic structural diagram of an embodiment of the temperature controller for a food processor of the present utility model.

[0012] Figure 2 is a schematic structural diagram after removing the fixing plate.

[0013] Figure 3 is Figure 1 the exploded structural diagram of.

[0014] Figure 4 is Figure 1 the further exploded structural diagram of. Detailed Embodiment

[0015] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4As shown, an embodiment of the temperature controller for the cooking machine of the present utility model has a through-channel in the center for the motor or the output shaft of the motor to pass through, and includes a housing 1 and a fixing plate 2 made of metal and adapted to the housing. Central through-holes 5 forming the through-channel are respectively provided in the centers of the housing and the fixing plate. A receiving cavity 12 is provided along the outer circle of the central through-hole of the housing 1. A cover plate 3 partially covering the receiving cavity 12 is provided between the receiving cavity and the fixing plate 2. A first contact switch and a second contact switch for overheat protection are respectively provided on both sides of the central through-hole 5 in the receiving cavity 12, which can avoid the mutual influence of the two contact switches and is convenient for assembly. The first contact switch cooperates with the bimetallic thermal actuator 4 installed on the fixing plate to achieve over-temperature protection. A grounding terminal 23 for grounding is provided at a position on the fixing plate 2 far from the first contact switch and the second contact switch. For the convenience of assembly and effectively separating the ground from the positive and negative poles to improve safety, a through-hole 15 for the grounding terminal 23 to pass through is provided on the outer wall of the receiving cavity 12 of the housing of this embodiment. The grounding terminal 23 is bent downward from the fixing plate 2, and the free end of the grounding terminal 23 passes through the through-hole 15 to form a grounding connection terminal outside.

[0016] A support arm 24 for installing a temperature sensing probe is also connected to the fixing plate. The end of the support arm 24 is in a "U"-shaped bayonet, and the NTC is inserted and clamped on the fixing plate 2 through the bayonet. The NTC temperature sensing probe is installed and fixed on the fixing plate in the form of the support arm 24 on the fixing plate without any fasteners. Since the support arm 24 can have the ability of elastic compression and reset, the temperature sensing end face of the NTC can always be closely attached to the heating body, accurately sensing the temperature, reducing interference factors, having a simple installation structure, improving production efficiency and being convenient for maintenance. Since the support arm has a certain range of elastic deformation ability, when the NTC is assembled and the temperature controller is connected to the bottom surface of the heating body, part of the pressing force can be offset, which can effectively avoid situations such as the sensing probe being damaged due to over-tight assembly.

[0017] The first contact switch comprises a first static contact A6, a first moving contact arm A4, an auxiliary porcelain rod A7, and a first limiting hole A31 for supporting the auxiliary porcelain rod A7 is formed on the cover plate 3. The movable end of the first moving contact arm A4 is placed below the bimetallic thermistor actuating sheet 4. The movable end of the first moving contact arm A4 is provided with a contact that can cooperate with the first static contact A6. The auxiliary porcelain rod A7 passes through the first limiting hole A31 of the cover plate 3 and stands upright between the first moving contact arm A4 and the bimetallic thermistor actuating sheet 4. When the first contact switch is actuated, that is, the bimetallic thermistor actuating sheet 4 drives the auxiliary porcelain rod A7 to move downward in linkage, and the movable end of the first moving contact arm A4 jumps downward under the action of the auxiliary porcelain rod A7, so that the contact on the first moving contact arm A4 is disengaged from the first static contact A6, thereby realizing over-temperature protection. The first contact switch achieves the effect of temperature control and boiling prevention through the bimetallic thermistor 4 combined with the contact switch, maintaining the temperature within a range, i.e. over-temperature protection. It is more sensitive and more stable than existing thermistors, and the contact switch is mechanical, more stable and has a longer life.

[0018] The second contact switch includes a second static contact arm B6 with a second static contact, a second moving contact arm B4, a safety top rod B7, and a second limiting hole B31 for supporting and limiting the safety top rod B7 is provided on the cover plate 3. The safety top rod B7 is an insulating fusible plastic part with a fixed melting point and is integrally formed. The movable end of the second moving contact arm B4 has a contact that matches the second static contact. The fixed plate 2 is provided with a second through hole 21 for the safety top rod B7 to pass through. The safety top rod B7 passes through the second through hole 21 and the second limiting hole B31 and stands upright between the second moving contact arm B4 and the heating element at the bottom of the container. The moving contact arm B4 is supported and pressed by the over-temperature protection top rod B7 to be in electrical contact with the static contact and is normally closed. When the heating element is overheated and exceeds the fixed melting point temperature of the over-temperature protection top rod B7 and the temperature control fails, the over-temperature protection top rod B7 self-melts to reduce the height, the moving contact arm B4 loses the pressure support and jumps up, and the moving contact arm B4 disconnects the electrical contact with the static contact to achieve the over-temperature insurance function. The second contact switch adopts a self-fusing safety device combined with a mechanical contact switch to realize the overheating insurance function. In the case of failure of the bimetallic thermistor actuator 4 or failure of the first contact switch, it can also play the role of the last insurance to prevent dry burning.

[0019] Since the food processor thermostat may be inverted or vibrated during use, in order to prevent the safety top rod B7 from sliding off in such a situation, the integrally formed safety top rod B7 of this embodiment has an anti-slip convex ring B71 on the lower part, and the convex ring B71 is located below the second limiting hole B31, and limits the safety top rod B7 through the lower edge of the second limiting hole B31 of the cover plate 3 to prevent it from sliding off the thermostat.

[0020] Although the present utility model has been disclosed above with specific embodiments, it is not intended to limit the present utility model. Any person skilled in the art can still make some modifications and refinements without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model shall be determined by the scope defined in the appended claims.

Claims

1. A temperature controller for a food processor, wherein a through passage is provided in the center thereof for passing the output shaft of a power supply or a motor, and wherein: The invention comprises a shell (1) and a metal fixing plate (2) adapted to the shell, wherein the shell and the fixing plate are respectively provided with a central through hole (5) forming a through passage, the shell (1) is provided with a receiving cavity (12) along the outer circle of the central through hole, a cover plate (3) partially covering the receiving cavity (12) is provided between the receiving cavity and the fixing plate (2), a first contact switch and a second contact switch for overheating insurance are respectively provided on both sides of the central through hole (5) in the receiving cavity (12), the first contact switch cooperates with a bimetallic thermally sensitive actuator (4) mounted on the fixing plate to realize over-temperature protection, and a grounding terminal (23) for grounding is provided on the fixing plate (2) at a position away from the first contact switch and the second contact switch.

2. The temperature controller for a food processor according to claim 1, characterized in that: A through hole (15) for a grounding terminal (23) to pass through is provided on the outer wall of the accommodating cavity (12) of the shell. The grounding terminal (23) is formed by bending downward from the fixing plate (2). The free end of the grounding terminal (23) passes through the through hole (15) to form a grounding terminal.

3. The temperature controller for a food processor according to claim 1 or 2, characterized in that: The fixing plate is also connected to a support arm (24) for mounting the NTC, and the end of the support arm (24) is a "U"-shaped bayonet, through which the NTC is side-entry-connected to the fixing plate (2).

4. The temperature controller for a food processor according to claim 1 or 2, characterized in that: The second contact switch comprises a second static contact arm (B6) with a second static contact, a second movable contact arm (B4), a safety top rod (B7), the cover plate (3) is provided with a second limit hole (B31) for supporting and limiting the safety top rod (B7), the safety top rod (B7) is an insulating fusible plastic part with a fixed melting point and integrally formed, the movable end of the second movable contact arm (B4) is provided with a contact matching the second static contact, the fixed plate (2) is provided with a second through hole (21) for the safety top rod (B7) to pass through, the safety top rod (B7) passes through the second through hole (21) and the second limit hole (B31) and stands upright between the second moving contact arm (B4) and the heating element at the bottom of the container. The moving contact arm (B4) is supported by the over-temperature protection top rod (B7) to press and electrically contact with the static contact and is normally closed. When the heating element is overheated and exceeds the fixed melting point of the over-temperature protection top rod (B7) and the temperature control fails, the over-temperature protection top rod (B7) self-melts and the height decreases. The moving contact arm (B4) loses the pressure support and jumps up. The moving contact arm (B4) disconnects the electrical contact with the static contact, thereby realizing the over-temperature insurance function.

5. The temperature controller for a food processor according to claim 3, characterized in that: The second contact switch comprises a second static contact arm (B6) with a second static contact, a second movable contact arm (B4), a safety top rod (B7), the cover plate (3) is provided with a second limit hole (B31) for supporting and limiting the safety top rod (B7), the safety top rod (B7) is an insulating fusible plastic part with a fixed melting point and integrally formed, the movable end of the second movable contact arm (B4) is provided with a contact matching the second static contact, the fixed plate (2) is provided with a second through hole (21) for the safety top rod (B7) to pass through, the safety top rod (B7) passes through the second through hole (21) and the second limit hole (B31) and stands upright between the second moving contact arm (B4) and the heating element at the bottom of the container. The moving contact arm (B4) is supported by the over-temperature protection top rod (B7) to press and electrically contact with the static contact and is normally closed. When the heating element is overheated and exceeds the fixed melting point of the over-temperature protection top rod (B7) and the temperature control fails, the over-temperature protection top rod (B7) self-melts and the height decreases. The moving contact arm (B4) loses the pressure support and jumps up. The moving contact arm (B4) disconnects the electrical contact with the static contact, thereby realizing the over-temperature insurance function.

6. The temperature controller for a food processor according to claim 4, characterized in that: The second contact switch comprises a second static contact arm (B6) with a second static contact, a second movable contact arm (B4), a safety top rod (B7), the cover plate (3) is provided with a second limit hole (B31) for supporting and limiting the safety top rod (B7), the safety top rod (B7) is an insulating fusible plastic part with a fixed melting point and integrally formed, the movable end of the second movable contact arm (B4) is provided with a contact matching the second static contact, the fixed plate (2) is provided with a second through hole (21) for the safety top rod (B7) to pass through, the safety top rod (B7) passes through the second through hole (21) and the second limit hole (B31) and stands upright between the second moving contact arm (B4) and the heating element at the bottom of the container. The moving contact arm (B4) is supported by the over-temperature protection top rod (B7) to press and electrically contact with the static contact and is normally closed. When the heating element is overheated and exceeds the fixed melting point of the over-temperature protection top rod (B7) and the temperature control fails, the over-temperature protection top rod (B7) self-melts and the height decreases. The moving contact arm (B4) loses the pressure support and jumps up. The moving contact arm (B4) disconnects the electrical contact with the static contact, thereby realizing the over-temperature insurance function.

7. The temperature controller for a food processor according to claim 1 or 2, characterized in that: The first contact switch comprises a first static contact (A6), a first moving contact arm (A4), an auxiliary porcelain rod (A7), and a first limiting hole (A31) for supporting the auxiliary porcelain rod (A7) is formed on the cover plate (3). The movable end of the first moving contact arm (A4) is placed below the bimetallic thermal-sensitive actuating sheet (4). The movable end of the first moving contact arm (A4) is provided with a contact that can cooperate with the first static contact (A6). The auxiliary porcelain rod (A7) passes through the first limiting hole (A31) of the cover plate (3) and stands upright between the first moving contact arm (A4) and the bimetallic thermal-sensitive actuating sheet (4). When the first contact switch is actuated, the bimetallic thermal-sensitive actuating sheet (4) drives the auxiliary porcelain rod (A7) to move downward in linkage, and the movable end of the first moving contact arm (A4) jumps downward under the action of the auxiliary porcelain rod (A7), so that the contact on the first moving contact arm (A4) is disengaged from the first static contact (A6), thereby realizing over-temperature protection.

8. The temperature controller for a food processor according to claim 3, characterized in that: The first contact switch comprises a first static contact (A6), a first moving contact arm (A4), an auxiliary porcelain rod (A7), and a first limiting hole (A31) for supporting the auxiliary porcelain rod (A7) is formed on the cover plate (3). The movable end of the first moving contact arm (A4) is placed below the bimetallic thermal-sensitive actuating sheet (4). The movable end of the first moving contact arm (A4) is provided with a contact that can cooperate with the first static contact (A6). The auxiliary porcelain rod (A7) passes through the first limiting hole (A31) of the cover plate (3) and stands upright between the first moving contact arm (A4) and the bimetallic thermal-sensitive actuating sheet (4). When the first contact switch is actuated, the bimetallic thermal-sensitive actuating sheet (4) drives the auxiliary porcelain rod (A7) to move downward in linkage, and the movable end of the first moving contact arm (A4) jumps downward under the action of the auxiliary porcelain rod (A7), so that the contact on the first moving contact arm (A4) is disengaged from the first static contact (A6), thereby realizing over-temperature protection.

9. The temperature controller for a food processor according to claim 4, characterized in that: The first contact switch comprises a first static contact (A6), a first moving contact arm (A4), an auxiliary porcelain rod (A7), and a first limiting hole (A31) for supporting the auxiliary porcelain rod (A7) is formed on the cover plate (3). The movable end of the first moving contact arm (A4) is placed below the bimetallic thermal-sensitive actuating sheet (4). The movable end of the first moving contact arm (A4) is provided with a contact that can cooperate with the first static contact (A6). The auxiliary porcelain rod (A7) passes through the first limiting hole (A31) of the cover plate (3) and stands upright between the first moving contact arm (A4) and the bimetallic thermal-sensitive actuating sheet (4). When the first contact switch is actuated, the bimetallic thermal-sensitive actuating sheet (4) drives the auxiliary porcelain rod (A7) to move downward in linkage, and the movable end of the first moving contact arm (A4) jumps downward under the action of the auxiliary porcelain rod (A7), so that the contact on the first moving contact arm (A4) is disengaged from the first static contact (A6), thereby realizing over-temperature protection.

10. The temperature controller for a food processor according to claim 5, characterized in that: The first contact switch comprises a first static contact (A6), a first moving contact arm (A4), an auxiliary porcelain rod (A7), and a first limiting hole (A31) for supporting the auxiliary porcelain rod (A7) is formed on the cover plate (3). The movable end of the first moving contact arm (A4) is placed below the bimetallic thermal-sensitive actuating sheet (4). The movable end of the first moving contact arm (A4) is provided with a contact that can cooperate with the first static contact (A6). The auxiliary porcelain rod (A7) passes through the first limiting hole (A31) of the cover plate (3) and stands upright between the first moving contact arm (A4) and the bimetallic thermal-sensitive actuating sheet (4). When the first contact switch is actuated, the bimetallic thermal-sensitive actuating sheet (4) drives the auxiliary porcelain rod (A7) to move downward in linkage, and the movable end of the first moving contact arm (A4) jumps downward under the action of the auxiliary porcelain rod (A7), so that the contact on the first moving contact arm (A4) is disengaged from the first static contact (A6), thereby realizing over-temperature protection.

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