Temperature limiter without outer cup

Abstract

The utility model relates to a temperature limiter without an outer cup, which comprises a cup body, an inner spring, a soft magnet, a permanent magnet and a pull rod, a cavity is arranged in the middle of the cup body, a notch leading to the cavity is arranged at the upper end of the cup body, the pull rod is slidably connected in the notch, the lower end of the pull rod is connected with the permanent magnet, and the soft magnet is connected in the cup body at the bottom of the cavity. The inner spring is elastically connected between the permanent magnet and the soft magnet, the permanent magnet is magnetically connected to the upper end of the soft magnet, and a connecting piece is arranged at the upper end of the cup body. The design of an outer cup is abandoned, a unified and simpler structure is adopted to be directly installed in the electric appliance, the cost of the outer cup is saved, huge cost generated by arranging multiple sets of molds is avoided, and meanwhile assembly of electric appliance manufacturers is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature limiters, in particular to a temperature limiter without an outer cup. Background Art

[0002] A thermostat is a temperature-sensitive controller whose primary function is to provide safety protection. If the internal temperature of a device exceeds a set limit, the thermostat immediately cuts off power and stops the device, thereby preventing safety accidents such as fire and burns caused by overheating. Traditional thermostats require an outer cup to be fixed to the appliance before the inner cup is installed. The outer cup size must be customized to fit specific appliance models, resulting in the need for multiple molds for production, which is costly. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a temperature limiter without an outer cup, which not only saves the cost of the outer cup, but also avoids the huge cost of opening multiple sets of molds, and is convenient for assembly by electrical appliance manufacturers.

[0004] The technical solution of the utility model is: a temperature limiter without an outer cup, comprising a cup body, an inner spring, a soft magnet, a permanent magnet and a pull rod, a cavity being provided in the middle of the cup body, a notch leading to the cavity being provided at the upper end of the cup body, the pull rod being slidably connected in the notch, the lower end of the pull rod being connected to the permanent magnet, the soft magnet being connected to the cup body at the bottom of the cavity, the inner spring being elastically connected between the permanent magnet and the soft magnet, the permanent magnet being magnetically connected to the upper end of the soft magnet, and a connecting piece being provided at the upper end of the cup body.

[0005] Furthermore, there are multiple connecting pieces arranged in a circular array on the upper end of the cup body.

[0006] Furthermore, the cross section of the connecting piece is arc-shaped, and a notch is provided at the upper end of the connecting piece, and a fault with a drop is formed on the side surface of the connecting piece at the notch.

[0007] Furthermore, it also includes a heat-conducting cover, the lower end of the cup body is provided with a first groove, the soft magnet is embedded in the first groove, the heat-conducting cover is connected to the lower end of the cup body, the lower end of the soft magnet is in contact with the heat-conducting cover, and the inner spring is sleeved on the inner wall of the cup body where the first groove is located.

[0008] Furthermore, the heat-conducting cover is connected to the cup body via threads.

[0009] Furthermore, the upper end of the first groove has an opening, and the upper end of the soft magnet is exposed in the cavity.

[0010] Furthermore, it also includes a pressure cover, the upper end of which is connected to the pull rod, and the lower end of the pressure cover is provided with a second groove with an opening facing downward, the permanent magnet is fixedly connected to the second groove, and the inner spring is sleeved on the outer wall of the pressure cover where the second groove is located.

[0011] Furthermore, the inner spring is elastically connected between the pressure cover and the bottom of the cup body.

[0012] Furthermore, it also includes an outer spring, which is sleeved on the outer wall of the cup body and abuts against the heat-conducting cover in the upper and lower parts.

[0013] Furthermore, heat shrink tubes are sleeved on the upper and lower ends of the outer spring, and the heat shrink tubes are elastically connected between the outer spring and the cup body.

[0014] Furthermore, the surfaces of the upper and lower ends of the outer spring are provided with transverse stripes, the direction of the transverse stripes is consistent with the spiral direction of the outer spring, and there are multiple transverse stripes arranged in a circular array on the surface of the outer spring.

[0015] Furthermore, a circumferential stripe is provided at the inner end of the transverse stripe, and the circumferential stripe surrounds the surface of the outer spring, and a plurality of circumferential stripes are arranged side by side.

[0016] Furthermore, the end of the heat shrink tube is a bell mouth.

[0017] Compared with the existing technology, the advantages of the present invention are: abandoning the design of the outer cup, adopting a unified and simpler structure to be directly installed in the electrical appliance, which not only saves the cost of the outer cup, but also avoids the huge cost of opening multiple sets of molds, and is convenient for assembly by electrical appliance manufacturers. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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.

[0019] Figure 1 It is a structural diagram of the utility model;

[0020] Figure 2 It is a three-dimensional diagram of the utility model;

[0021] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 This is a schematic structural diagram of the outer spring of the utility model;

[0023] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0024] Figure 6 This is a schematic structural diagram of the heat shrink tube of the utility model.

[0025] Among them: 1. Thermal conductive cover; 2. Cup body; 201. First groove; 202. Cavity; 203. Notch; 3. Pressure cover; 301. Second groove; 4. Soft magnet; 5. Permanent magnet; 6. Inner spring; 7. Connecting plate; 701. Incision; 702. Fault; 8. Pull rod; 9. Outer spring; 901. Horizontal stripes; 902. Circumferential stripes; 10. Heat shrink tube; 1001. Bell mouth. DETAILED DESCRIPTION

[0026] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description of the specific implementation method, structure, characteristics and effects of the present invention in combination with the accompanying drawings and preferred embodiments.

[0027] like Figure 1-6 As shown, a temperature limiter without an outer cup includes a cup body 2, an inner spring 6, a soft magnet 4, a permanent magnet 5 and a pull rod 8. A cavity 202 is provided in the middle of the cup body 2, and a notch 203 leading to the cavity 202 is provided at the upper end of the cup body 2. The pull rod 8 is slidably connected to the notch 203. The lower end of the pull rod 8 is connected to the permanent magnet 5. The soft magnet 4 is connected to the cup body 2 at the bottom of the cavity 202. The inner spring 6 is elastically connected between the permanent magnet 5 and the soft magnet 4. The permanent magnet 5 can be magnetically connected to the upper end of the soft magnet 4. A connecting piece is provided at the upper end of the cup body 2; the connecting piece is used when the cup body 2 is turned upside down. The invention is connected and fixed to an electrical appliance. When the appliance is operating normally, the permanent magnet 5 is magnetically attracted to the soft magnet 4 and compresses the inner spring 6, while the pull rod 8 is inserted into the circuit component and conducts the circuit of the appliance. During the operation of the appliance, if the soft magnet 4 continues to heat up and accumulates a certain amount of heat, the soft magnet 4 will approach or reach the Curie temperature of about 100°C after absorbing heat, and the atomic magnetic moment inside the soft magnet 4 will become disordered, causing the magnetism to disappear. At this time, the spring force will bounce the permanent magnet 5 away, and the pull rod 8 will be separated from the circuit component and disconnect the circuit, realizing automatic gear shifting of the appliance and protecting the appliance. In traditional temperature limiters, the outer cup of the cup body 2 needs to be matched with the outer cup. The outer cup is fixed in the appliance, and then the inner cup body 2 is installed. The size of the outer cup needs to be customized to fit the specific model of the appliance, resulting in the need to open multiple sets of molds for production, which is costly. The temperature limiter used in the present invention abandons the outer cup design and adopts a unified and simpler structure that is directly installed in the appliance. This not only saves the cost of the outer cup, but also avoids the huge cost of opening multiple sets of molds, while also facilitating assembly by appliance manufacturers.

[0028] In the above embodiment, the connectors are multiple and arranged in a circular array at the upper end of the cup body 2; generally, there are three connectors, forming a stable triangular structure that provides firm support for the cup body 2. The connector has an arcuate cross-section, and a notch 701 is provided at the upper end of the connector. When the connector is cut and deformed and released, a step 702 is formed on the side of the connector at the notch 701. As the connector is inserted into the mounting portion of the appliance, the height difference of the step 702 first decreases and then increases, i.e., it first compresses and then rebounds. After being inserted into the mounting portion of the appliance, the step 702 rebounds and pulls the connector, thereby securing the cup body 2.

[0029] The temperature limiter also includes a heat-conducting cover 1. The lower end of the cup body 2 is provided with a first groove 201, and the soft magnet 4 is embedded in the first groove 201. The heat-conducting cover 1 is connected to the lower end of the cup body 2, and the lower end of the soft magnet 4 is in contact with the heat-conducting cover 1. The inner spring 6 is sleeved on the inner wall of the cup body 2 where the first groove 201 is located. The first groove 201 provides positioning for the installation of the soft magnet 4, and the heat-conducting cover 1 is made of a thin-walled, heat-conducting material to ensure that the heat of the electrical components in contact with the heat-conducting cover 1 is quickly transferred to the soft magnet 4, compressing the transfer time and ensuring the rapid realization of the temperature limiter's shifting function. The heat-conducting cover 1 and the cup body 2 are connected by threads, and assembly is convenient and quick. The upper end of the first groove 201 has an opening, and the upper end of the soft magnet 4 is exposed in the cavity 202, so that the limit position of the soft magnet 4 and the permanent magnet 5 are closer, and a greater magnetic attraction force can be provided when magnetically connected.

[0030] The temperature limiter also includes a gland 3, the upper end of which is connected to the pull rod 8, and the lower end of the gland 3 is provided with a second groove 301 with an opening facing downward. The permanent magnet 5 is fixedly connected to the second groove 301, and the inner spring 6 is sleeved on the outer wall of the gland 3 where the second groove 301 is located; the lower part of the pull rod 8 is provided with an annular groove, which corresponds to the circular opening on the upper part of the gland 3. The groove can be just embedded in the circular opening to form a connection and fixation between the pull rod 8 and the gland 3; the opening at the lower end of the gland 3 is also to bring the limit positions of the soft magnet 4 and the permanent magnet 5 closer. The inner spring 6 is elastically connected between the gland 3 and the bottom of the cup body 2, which is convenient and quick to assemble. The inner spring 6 will not move away from its original position during the compression and rebound process, ensuring the smooth implementation of the rebound function.

[0031] The present thermostat further comprises an outer spring 9, which is sleeved onto the outer wall of the cup body 2 and abuts the heat conductive cover 1 from top to bottom. As a component of a conventional thermostat, the outer spring 9 can be incorporated into the present thermostat to provide elastic force to assist the cup body 2 in opening, ensuring the smooth implementation of the shift function. Furthermore, the outer spring 9 can be purchased in different sizes according to assembly requirements. When the thermostat is installed in the reserved position of an appliance, it fills the gap between the thermostat and the reserved position, preventing the thermostat from becoming loose and providing a more secure installation. Heat shrink tubing 10 is sleeved on both ends of the outer spring 9, elastically connecting the outer spring 9 to the cup body 2. After the telescopic tube is inserted, it is heated by a drying gun to deform the heat shrink tubing 10 and adhere to the surface of the outer spring 9, preventing the heat shrink tubing 10 from falling out of the outer spring 9. The telescopic tube can be of varying wall thickness to accommodate the gap between the thermostat and the reserved position in different appliances, allowing the telescopic tube to abut in the gap, thereby forming a secure connection.

[0032] The outer spring 9 is provided with transverse striations 901 on both its upper and lower surfaces. These striations 901 align with the spiral direction of the outer spring 9. Multiple transverse striations 901 are arranged in a circular pattern on the outer spring 9. Once the expansion tube is in close contact with these striations 901, it will not, or will be difficult to, twist when inserted into the gap between the temperature limiter and the reserved position for the appliance. This ensures the tube's proper shape and prevents it from deviating from its correct installation position when it is deformed and reset, thereby preventing it from dislodging from the bottom or top of the gap. The inner ends of these transverse striations 901 are provided with circumferential striations 902, which circumscribe the outer spring 9. Multiple circumferential striations 902 are arranged side by side. These striations 902 engage and overlap one end of the heat shrink tubing 10 after contraction, preventing the tubing 10 from slipping out along the spiral path of the outer spring 9. The end of the heat shrink tubing 10 is formed into a flared mouth 1001, making it easier to insert into the outer spring 9.

[0033] Description of the working method of this utility model:

[0034] The connecting piece is used to connect and fix the cup body 2 in the electric cooker when it is turned upside down. When the electric cooker is operating normally, the permanent magnet 5 is magnetically attracted to the soft magnet 4 and compresses the inner spring 6, while the pull rod 8 is inserted into the circuit components and conducts the circuit of the electric cooker. During the operation of the electric cooker, if the soft magnet 4 continues to generate heat and accumulates a certain amount of heat, the soft magnet 4 will approach or reach the Curie temperature of about 100°C after absorbing heat, and the atomic magnetic moment inside the soft magnet 4 will be disordered, causing the magnetism to disappear. At this time, the spring force will bounce the permanent magnet 5 off, and the pull rod 8 will be separated from the circuit components and disconnect the circuit, realizing the automatic shifting of the electric cooker. The temperature limiter adopted in the utility model abandons the design of an outer cup and adopts a unified and simpler structure to be directly installed in the electric cooker, which not only saves the cost of the outer cup, but also avoids the huge cost of setting up multiple sets of molds, and is convenient for assembly by electrical appliance manufacturers.

[0035] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A temperature limiter without an outer cup, comprising a cup body, an inner spring, a soft magnet, a permanent magnet and a pull rod, characterized in that: A cavity is provided in the middle of the cup body, and a notch leading to the cavity is provided at the upper end of the cup body. A pull rod is slidably connected to the notch, and the lower end of the pull rod is connected to the permanent magnet. The soft magnet is connected to the cup body at the bottom of the cavity. The inner spring is elastically connected between the permanent magnet and the soft magnet. The permanent magnet can be magnetically connected to the upper end of the soft magnet. A connecting piece is provided at the upper end of the cup body.

2. The outer cup-less temperature limiter according to claim 1, characterized in that: There are multiple connecting pieces arranged in a circumferential array on the upper end of the cup body.

3. The outer cup-less temperature limiter according to claim 1, characterized in that: The cross section of the connecting piece is arc-shaped, and a notch is provided at the upper end of the connecting piece. A fault with a drop is formed on the side surface of the connecting piece at the notch.

4. The outer cup-less temperature limiter according to claim 1, characterized in that: It also includes a heat-conducting cover, wherein the lower end of the cup body is provided with a first groove, the soft magnet is embedded in the first groove, the heat-conducting cover is connected to the lower end of the cup body, the lower end of the soft magnet is in contact with the heat-conducting cover, the inner spring is sleeved on the inner wall of the cup body where the first groove is located, the heat-conducting cover and the cup body are connected by threads, the upper end of the first groove has an opening, and the upper end of the soft magnet is exposed in the cavity.

5. The outer cup-less temperature limiter according to claim 1, characterized in that: It also includes a pressure cover, the upper end of which is connected to the pull rod, and the lower end of the pressure cover is provided with a second groove with an opening facing downward, the permanent magnet is fixedly connected to the second groove, and the inner spring is sleeved on the outer wall of the pressure cover where the second groove is located, and the inner spring is elastically connected between the pressure cover and the bottom of the cup body.

6. The outer cup-less temperature limiter according to claim 4, characterized in that: The outer spring is sleeved on the outer wall of the cup body, and the outer spring abuts against the heat-conducting cover in the upper and lower parts.

7. The outer cup-less temperature limiter according to claim 6, characterized in that: Heat shrink tubes are sleeved on the upper and lower ends of the outer spring, and the heat shrink tubes are elastically connected between the outer spring and the cup body.

8. The outer cup-less temperature limiter according to claim 7, characterized in that: The surfaces of the upper and lower ends of the outer spring are provided with transverse stripes, the direction of the transverse stripes is consistent with the spiral direction of the outer spring, and there are multiple transverse stripes arranged in a circular array on the surface of the outer spring.

9. The outer cup-less temperature limiter according to claim 7, characterized in that: The end of the heat shrink tube is a bell mouth.

10. The outer cup-less temperature limiter according to claim 8, characterized in that: A circumferential stripe is provided at the inner end of the transverse stripe. The circumferential stripe surrounds the surface of the outer spring, and a plurality of circumferential stripes are arranged side by side.

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