Low-temperature heat pump

By using a combination of defrosting sheet metal, electric heating wire and temperature sensor in the defrosting mechanism of the low-temperature heat pump, the problem of frosting on the fin is solved, improving work efficiency and extending service life.

CN222688482UActive Publication Date: 2025-03-28JIANGSU JINTONG LINGGUANG NUCLEAR ENERGY TECH CO LTD
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Patent Information

Application Number
CN202421439219.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-24
Publication Date
2025-03-28
Estimated Expiration
2034-06-24

AI Technical Summary

Technical Problem

When the low-temperature heat pump is running, frost is easily formed on the fins, resulting in a decrease in heat exchange area, reduced working efficiency, and may cause refrigerant leakage and shorten service life.

Method used

A defrosting mechanism is designed, including defrosting sheet metal, electric heating wire and temperature sensor. The defrosting sheet metal is a hollow bar structure, and the electric heating wire is fixed inside it. The temperature sensor monitors the temperature. When the temperature is lower than the preset threshold, the electric heating wire is connected to the power supply, melts the frost, and guides the condensate away from the fin through the drainage surface.

Benefits of technology

It effectively alleviates the problem of secondary frosting on the fins, improves heat exchange efficiency, extends the service life of the low-temperature heat pump, and avoids refrigerant leakage.

✦ Generated by Eureka AI based on patent content.
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Abstract

The utility model provides a low-temperature heat pump which comprises an outer frame, an evaporator fixedly arranged on the outer frame and a defrosting mechanism. The defrosting mechanism comprises a power source, a controlled switch electrically connected with the power source, at least one defrosting sheet metal part fixed to the fins, an electric heating wire electrically connected with the controlled switch and a temperature sensor, and the defrosting sheet metal part is of a hollow strip-shaped structure and is provided with an exposed drainage face; the electric heating wire and the temperature sensor are both fixed in the defrosting sheet metal part and are close to the drainage surface, the controlled switch is in signal connection with the temperature sensor, and the controlled switch is constructed to be closed when the temperature monitored by the temperature sensor is smaller than a preset first threshold value. When the low-temperature heat pump monitors that the temperature of the defrosting sheet metal part is low and secondary frosting possibly exists, the controlled switch is switched on, and a power source is connected to the electric heating wire. Therefore, the electric heating wire can improve the surface temperature of the defrosting sheet metal part, and secondary frost on the fins is melted.
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