Direct expansion type solar assisted closed-loop type heat pump drying system

A technology of heat pump drying and solar energy, which is applied in the direction of solar thermal power generation, drying, dryers, etc., can solve the problems of serious environmental pollution, difficult temperature adjustment, slow drying speed, etc., achieve green resources and expand application fields , The effect of power consumption reduction

Active Publication Date: 2017-08-04
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a direct expansion solar-assisted closed-circuit heat pump drying system to solve the problems of serious environmental pollution, relatively low dehumidification energy consumption, high operating cost, slow drying rate and difficult temperature adjustment in the existing drying process. outstanding technical issues

Method used

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  • Direct expansion type solar assisted closed-loop type heat pump drying system
  • Direct expansion type solar assisted closed-loop type heat pump drying system
  • Direct expansion type solar assisted closed-loop type heat pump drying system

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Embodiment 1

[0024] Such as figure 1As shown, the present invention provides a direct expansion solar-assisted closed-circuit heat pump drying system, which is characterized in that the system is mainly composed of a solar-air three-pressure heat pump subsystem and a closed-circuit drying medium circulation subsystem. The solar-air three-pressure heat pump subsystem described therein consists of a main road compressor 1, a main road oil separator 2, a main road condenser 3, a recooler 4, a dry filter 5, an observation mirror 6, and a first expansion valve 7. Medium-pressure gas-liquid separator 8, second expansion valve 9, dehumidification evaporator 10, solar collector 11, low-pressure gas-liquid separator 12, evaporation pressure regulating valve 13, auxiliary circuit compressor 14, auxiliary circuit oil separator 15, The first one-way valve 16, the second one-way valve 17, the first electric regulating valve 18, the second electric regulating valve 19 and connecting pipelines are compos...

Embodiment 2

[0027] The main road compressor 1 described in the present invention is a fixed-frequency scroll compressor, and the auxiliary road compressor 14 is a fixed-frequency rolling rotor compressor; the main road condenser 3 is a finned tube heat exchanger, a dehumidifier The evaporator 10 is a parallel flow heat exchanger; the first expansion valve 7 is a float type expansion valve, and the second expansion valve 9 is a flow resistance expansion valve; the circulating fan 21 is a fixed frequency fan; The evaporating pressure regulating valve 13 mentioned above is a proportional differential regulating valve controlled by the pre-valve pressure (ie evaporating pressure); the described subcooler 4 is in the flasher. Other structures are the same as in Embodiment 1.

Embodiment 3

[0029] The main circuit compressor 1 of the present invention is a frequency conversion rolling rotor compressor, and the auxiliary circuit compressor 14 is a frequency conversion scroll compressor; the main circuit condenser 3 is a stacked heat exchanger, and the dehumidification evaporator 10 is a parallel compressor. flow heat exchanger; the first expansion valve 7 is a float type expansion valve, and the second expansion valve 9 is a thermal expansion valve; the circulating fan 21 is a frequency conversion fan; the evaporation pressure regulating valve 13 is A proportional-integral-differential regulating valve controlled by the pre-valve pressure (that is, evaporation pressure); the subcooler 4 is a casing heat exchanger. Other structures are the same as in Embodiment 1.

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Abstract

The invention relates to the technical field of heat pump drying, in particular to a direct expansion type solar assisted closed-loop type heat pump drying system. The closed-loop type heat pump drying system comprises a solar-air tri-pressure heat pump subsystem and a closed-loop type drying medium circulation subsystem. A solar heat collector, a dehumidification evaporator and a byroad adjusting system are used in cooperation based on a heat pump drying system, the prominent technical problems that in an existing drying process, environmental pollution is serious, the operating cost is high, the drying rate is low, and the dehumidification energy consumption is low are solved, the efficiency of heat pump material drying is remarkably improved, and the fineness, quality and aroma of drying materials are guaranteed.

Description

technical field [0001] The invention relates to the technical field of heat pump drying, in particular to a closed-circuit heat pump drying system assisted by direct expansion solar energy. Background technique [0002] Facing the increasingly prominent problems of energy shortage and environmental pollution, traditional drying technologies such as oil, gas, coal or wood have been gradually eliminated. There are currently two commonly used environmental protection drying technologies, one is to use electric heating The tube direct heating technology is easy to operate, but the efficiency is too low and the operating cost is high, which is contrary to the national energy-saving policy; the other is the heat pump drying technology, especially the air source heat pump technology, which is simple in structure, easy to install and use, and energy-saving. Environmental protection, some enterprises have begun to put it into use. However, the current conventional air source heat pu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B9/06F26B21/00F26B21/04F26B21/08F26B21/10
CPCF26B9/06F26B21/001F26B21/004F26B21/04F26B21/086F26B21/10Y02E10/40
Inventor 崔四齐桑翎刘寅马静刘恩海于海龙酒曼张艳
Owner ZHONGYUAN ENGINEERING COLLEGE
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