Temperature compensation device for speed regulation resistor of automobile air conditioner

By employing a vertical welding structure between the thermistor and the compensation circuit board, and a direct connection design with the heat-conducting plate, the problem of resistance fluctuation in the automotive air conditioning speed control resistor during temperature changes is solved. This achieves stability of fan speed and improves heat dissipation efficiency, while reducing system complexity and cost.

CN224419142UActive Publication Date: 2026-06-26SHANGHAI YIHANG AUTOMOBILE PARTS
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Patent Information

Application Number
CN202521457445.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-07-12
Publication Date
2026-06-26
Estimated Expiration
2035-07-12

AI Technical Summary

Technical Problem

The resistance of the speed control resistor in an automotive air conditioning system fluctuates with temperature changes, causing unstable fan speed and affecting cooling or heating performance. Existing technology cannot achieve accurate compensation across the entire temperature range and increases system complexity and cost.

Method used

The thermistor and the compensation circuit board are vertically welded together. Combined with the elastic pressure plate and constant pressure in the connecting bracket, the thermistor and the speed control resistor body are made into zero-gap contact. The heat-conducting plate is directly connected to the heat sink to replace the external heat dissipation circuit. The heat dissipation efficiency is improved by using honeycomb holes and micro-arc oxidation layer. Precise compensation is achieved through the clamping rod and clamping seat structure.

Benefits of technology

This achieves improved fan speed stability across the entire temperature range, reduces system complexity and the number of parts, optimizes heat dissipation, and lowers system costs.

✦ Generated by Eureka AI based on patent content.
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Abstract

The utility model relates to the technical field of automobile air conditioner systems, and discloses a temperature compensation device of an automobile air conditioner speed regulation resistor, which comprises a temperature compensation module, a speed regulation resistor module and a bracket assembly. According to the temperature compensation device for the speed regulation resistor of the automobile air conditioner, through a vertical welding structure of the pins of the thermistor and the compensation circuit board and in combination with constant voltage applied by the elastic pressing sheet in the connecting bracket, zero-clearance contact between the thermistor and the speed regulation resistor body of the automobile air conditioner is ensured, and accurate compensation in a full temperature range is realized; the connecting support integrates a compensation circuit board and a clamping rod structure driven by a spring, compared with a traditional scheme, the number of parts is reduced, a heat conducting fin and a cooling fin are directly connected to replace an external cooling circuit, the design of an external circuit is reduced, and meanwhile the specific surface area can be increased through formed honeycomb holes; the micro-arc oxidation layer improves the natural convection efficiency, optimizes the heat dissipation effect, and reduces the system complexity.
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