Air-cooled radio frequency triode temperature protection device
By installing a thermal fuse and an insulated pull wire connected by lead-tin alloy on the housing of the RF transistor, the overheating problem of the air-cooled RF transistor is solved, achieving simple and reliable temperature protection and avoiding equipment damage.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- STALAM SHANGHAI DEYI MACHINERY MFG
- Filing Date
- 2026-03-12
- Publication Date
- 2026-05-29
AI Technical Summary
Existing technology cannot directly detect the housing temperature of air-cooled RF transistors, resulting in overheating that cannot be prevented in time, affecting equipment lifespan and safety.
A thermal fuse is installed on the housing of the radio frequency transistor. A lead-tin alloy is used as the material with a melting point of 180°C. It is connected to a pull-cord switch via an insulated pull wire to achieve temperature protection. When the housing overheats, the lead-tin alloy melts, and the pull-cord switch activates to cut off the circuit and protect the transistor.
It enables direct detection and timely protection of the transistor housing temperature, with a simple structure, low cost, and high reliability by avoiding radio frequency interference.
Smart Images
Figure CN224306304U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of radio frequency drying technology, specifically a temperature protection device for an air-cooled radio frequency transistor. Background Technology
[0002] Air-cooled RF transistors generate a significant amount of heat during the conversion of electrical energy into radio frequency (RF) signal. Forced air cooling is necessary to remove this heat and ensure the transistor's body temperature does not exceed 180°C; otherwise, the transistor will burn out or its lifespan will be shortened. However, the RF transistor casing carries a 12KV high-voltage current during operation, and the RF generator enclosure contains a high-voltage, high-frequency electric field. Current measurement methods cannot directly detect the casing temperature to prevent overheating. Air-cooled RF transistor temperature protection devices address this problem by directly detecting the transistor casing temperature and promptly shutting down the RF transistor when overheating occurs, thus providing protection. Utility Model Content
[0003] The technical problem solved by this utility model is to provide a temperature protection device for an air-cooled radio frequency transistor, so as to solve the problems mentioned in the background art.
[0004] The technical problem solved by this utility model is achieved by the following technical solution: a temperature protection device for an air-cooled radio frequency transistor, including a radio frequency transistor, a housing is provided on the radio frequency transistor, a screw hole is provided on the housing, a temperature fuse is installed on the screw hole, the temperature fuse is a hexagonal bolt, a hole is drilled in the hexagonal bolt, the hole is filled with lead-tin alloy, a lead wire is pre-embedded in the lead-tin alloy, the lead wire is connected to an insulated pull wire, and the insulated pull wire passes through the radio frequency generator box and is installed in the inner transformer box.
[0005] Furthermore, the transformer box is equipped with a pull-cord switch, the signal control circuit of the pull-cord switch controls the protection circuit of the radio frequency transistor, and the insulated pull wire is installed on the pull-cord switch.
[0006] Furthermore, the melting point of the lead-tin alloy is 180°C.
[0007] Furthermore, the insulated wire is a polypropylene insulated wire.
[0008] Compared with the prior art, the advantages of this utility model are: this utility model can directly detect the temperature of the transistor housing, has a simple structure, low cost, avoids radio frequency interference, and has high reliability. Attached Figure Description
[0009] Figure 1 This is a schematic diagram of the structure of this utility model.
[0010] Figure 2This is a schematic diagram of the structure of the hexagonal bolt of this utility model.
[0011] In the diagram: 1-RF transistor; 2-Temperature fuse; 3-Lead wire; 4-Insulated pull wire; 5-RF generator box; 6-Internal transformer box; 7-Pull switch; 8-Hex bolt; 9-Lead-tin alloy. Detailed Implementation
[0012] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "connection" should be interpreted broadly. For example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium; and they can be internal connections between two components.
[0013] like Figure 1 , Figure 2 As shown, a temperature protection device for an air-cooled radio frequency transistor includes a radio frequency transistor 1. A housing is provided on the radio frequency transistor 1, and a screw hole is provided on the housing. A temperature fuse 2 is installed in the screw hole. The temperature fuse 2 is configured as a hexagonal bolt 8, with a hole drilled inside the hexagonal bolt 8. The hole is filled with a lead-tin alloy 9, and a lead wire 3 is pre-embedded inside the lead-tin alloy 9. The lead wire 3 is connected to an insulated pull wire 4. The insulated pull wire 4 passes through a radio frequency generator box 5 and is installed in an inner transformer box 6, which can isolate the 12KV high-voltage current from the transistor housing.
[0014] Furthermore, the transformer box 6 is equipped with a pull-cord switch 7, the signal control circuit of the pull-cord switch 7 is a protection circuit of the radio frequency transistor, and the insulated pull wire 4 is installed on the pull-cord switch 7.
[0015] Furthermore, the melting point of the lead-tin alloy is 180°C.
[0016] Furthermore, the insulating wire 4 is a polypropylene insulating wire.
[0017] The working principle of this invention is as follows: A screw hole is pre-drilled on the housing of the RF transistor 1, and a thermal fuse 2 is installed on it. The thermal fuse 2 is a copper M6 hexagonal bolt with a 3mm diameter hole drilled inside. The hole is filled with a lead-tin alloy with a melting point of 180℃, and a copper lead wire 3 is embedded in the alloy. The copper lead wire 3 is connected to a polypropylene insulated pull wire 4, which leads from the RF generator box 5 to the adjacent transformer box 6, thus isolating the 12KV high voltage from the transistor housing. The insulated pull wire is pre-tensioned to a pull switch 7 installed in the transformer box. The signal from the pull switch 7 controls the protection circuit of the RF transistor.
[0018] When an overheating phenomenon occurs during the operation of the RF transistor, the fuse 2 installed on the transistor 1 housing is heated, and the internal lead-tin alloy melts after reaching its melting point. The copper lead 3 is pulled out due to the tension of the pre-tensioned pull wire 4. The loosening of the pull wire 4 causes the pull switch 7 to activate, sending a signal to stop the operation of the RF transistor, thereby effectively protecting the RF transistor.
[0019] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A temperature protection device for an air-cooled radio frequency transistor, comprising a radio frequency transistor (1), characterized in that: The radio frequency transistor (1) is provided with a housing, and the housing is provided with a screw hole. A thermal fuse (2) is installed in the screw hole. The thermal fuse (2) is provided with a hexagonal bolt (8). A hole is drilled in the hexagonal bolt (8). The hole is filled with lead-tin alloy (9). A lead wire (3) is embedded in the lead-tin alloy (9). The lead wire (3) is connected to an insulated pull wire (4). The insulated pull wire (4) passes through the radio frequency generator box (5) and is installed in the inner transformer box (6).
2. The air-cooled radio frequency transistor temperature protection device as described in claim 1, characterized in that: The transformer box (6) is equipped with a pull-wire switch (7), the signal of the pull-wire switch (7) controls the protection circuit of the radio frequency transistor, and the insulated pull wire (4) is installed on the pull-wire switch (7).
3. The air-cooled radio frequency transistor temperature protection device as described in claim 1, characterized in that: The melting point of the lead-tin alloy is 180°C.
4. The air-cooled radio frequency transistor temperature protection device as described in claim 1, characterized in that: The insulated guy wire (4) is a polypropylene insulated guy wire.