How a freeze drying system with secondary anti-icing protection works

A drying system and working method technology, applied in the direction of separation methods, drying solid materials, chemical instruments and methods, etc., can solve the problems of affecting the normal operation of the system, wasting compressed air, and low accuracy, and solve the problems of insufficient system output capacity, Prevent ice blockage and waste of electric energy, solve the effect of non-adjustable temperature

Active Publication Date: 2021-06-18
佛山市厦欣科技有限公司 +1
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Problems solved by technology

[0002] Most of the existing refrigerated dryers on the market use fixed-frequency compressors and hot gas bypass valves for anti-icing protection. This part is a mechanical structure product, which is expensive, has low precision, and is easily damaged.
Secondly, when the hot gas bypass valve is damaged, the system loses the anti-icing protection, which affects the normal operation of the system
The system cannot automatically adjust the output power according to the temperature of the evaporator or automatically start after the shutdown caused by ice blockage. It often needs to be manually checked and restarted, which will easily lead to the system not running autonomously when no one is on duty after the system is shut down due to ice blockage. Injected compressed air, causing unnecessary waste

Method used

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  • How a freeze drying system with secondary anti-icing protection works

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Embodiment Construction

[0015] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. The purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0016] See attached figure 1 As shown, the working method of the refrigerated drying system with secondary anti-icing protection, the refrigerated drying system of this embodiment includes a compressor (DC frequency conversion), a condenser and an evaporator, wherein the two ends of the condenser are respectively connected to The inlet of the evaporator is connected to the exhaust end of the compressor, and the outlet of the evaporator is connected to the return air end of ...

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Abstract

The invention discloses a working method of a refrigerated drying system with secondary anti-icing protection. The evaporator of the system is provided with an air flow channel for compressed air to pass through. The compressed air exchanges heat with the evaporator through the air flow channel. After the system runs smoothly, monitor the outlet temperature T1 of the evaporator in real time, and calculate the temperature difference with the set rated temperature T0 in real time, and adjust the operating frequency of the compressor of the system accordingly based on the temperature difference.

Description

technical field [0001] The invention relates to the technical field of dryer system control, in particular to the working method of a freeze drying system with secondary anti-icing protection. Background technique [0002] Most of the existing refrigerated dryers on the market use fixed-frequency compressors and hot gas bypass valves for anti-icing protection. This part is a mechanical structure product, which is expensive, has low precision, and is easily damaged. Secondly, when the hot gas bypass valve is damaged, the system loses the anti-icing protection, thus affecting the normal operation of the system. The system cannot automatically adjust the output power according to the temperature of the evaporator or automatically start after the shutdown caused by ice blockage. It often needs to be manually checked and restarted, which will easily lead to the system not running autonomously when no one is on duty after the system is shut down due to ice blockage. Injected comp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F26B5/06F25D21/04F25B39/02F25B49/02B01D5/00B01D53/26
CPCB01D53/002B01D53/265F25B39/02F25B49/022F25D21/04F26B5/06
Inventor 朱定林刘志辉张成银郑志辉陈思周克乐吴江勇
Owner 佛山市厦欣科技有限公司
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