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Closed-loop double-evaporator drying heat pump and volatile oil recovery method

A technology of double evaporators and evaporators, which is applied in drying, drying machines, drying solid materials, etc., can solve the problems that cannot satisfy the liquefaction and recovery of volatile oil, it is difficult to ensure continuous heating and dehumidification, closed-loop drying, etc., and achieve rapid heating and temperature Humidity control, guaranteed operating performance, and improved heating rate

Pending Publication Date: 2018-08-07
CHUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] To sum up, the current drying heat pump is difficult to ensure continuous heating, dehumidification and closed-loop drying, and the existing technology cannot meet the requirements of liquefaction and recovery of volatile oil while drying materials.

Method used

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  • Closed-loop double-evaporator drying heat pump and volatile oil recovery method
  • Closed-loop double-evaporator drying heat pump and volatile oil recovery method

Examples

Experimental program
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Effect test

Embodiment 1

[0040] like figure 1 As shown, a closed-loop double evaporator drying heat pump is composed of a fluorine system and a dryer frame 6. The double evaporator drying heat pump can be an integrated machine, or a heat pump main unit composed of a fluorine system and a drying machine. room combination; the dryer frame 6 constitutes a closed drying chamber and an indoor medium circulation channel through a partition; the main evaporator 4 and the secondary evaporator 10 are connected in parallel to form the low-pressure area of ​​the fluorine system; the main evaporator 4 is installed in Outside the drying room, the secondary evaporator 10 and the condenser 7 are installed in the drying room; the first outlet of the compressor 3 is connected to the condenser 7 through the four-way reversing valve 2, and the condenser 7 passes through the throttling device 9 and then has two A parallel branch, one way is connected to the secondary evaporator 10, and the other is connected to the main ...

Embodiment 2

[0045] When the material is in the late stage of drying, the humidity of the material is low, and the temperature in the drying room is high, and constant temperature dehumidification is carried out to realize energy-saving drying. In the dehumidification mode, the refrigerant does not flow into the main evaporator 4. At this time, the refrigerant flow direction is: compressor 3 → four-way reversing valve 2 → condenser 7 → throttling device 9 → secondary evaporator 10 → second electromagnetic two-way valve 12 → Four-way reversing valve 2 → Gas-liquid separator 1 → Compressor 3.

Embodiment 3

[0047] Closed loop double evaporator drying heat pump for volatile oil recovery:

[0048] The frame 6 of the dryer constitutes a plurality of medium circulation channels. Driven by the axial flow fan 8, the medium flows through the surface of the condenser 7 to heat the medium, and the hot air transfers heat to the material on the tray 5, heating the material, and making the moisture in the material The volatile oil diffuses into the medium to form hot and humid oily air. The medium circulation channel is divided into a local low-temperature zone and a pure medium channel. The local low-temperature zone is formed by installing a secondary evaporator 10 in the medium circulation channel. The pure medium channel is only used as a circulation of the medium. Without liquefaction treatment, because of the secondary evaporator in the local low-temperature area, the wind resistance is greater than that of the pure medium channel, so the circulating medium in the drying chamber is main...

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Abstract

The invention discloses a closed-loop double-evaporator drying heat pump. The double-evaporator drying heat pump consists of a fluoride system and a dryer frame, wherein the dryer frame forms a closeddrying chamber and indoor medium circulating channel by partition boards; a main evaporator and a second evaporator are connected in parallel to form a low-pressure area of the fluoride system; the main evaporator is installed outside the drying chamber, and the second evaporator and a condenser are installed in the drying chamber; an outlet of a compressor is connected to the condenser by a four-way reversing valve, the condenser is provided with two parallel branches after passing through a throttling device, one branch is connected with the second evaporator, and the other branch is connected with the main evaporator; and the main evaporator and the second evaporator are connected with a gas-liquid separator and the compressor in sequence by the four-way reversing valve. The closed-loop double-evaporator drying heat pump provided by the invention is a drying system which can carry out dehumidification without changing a running mode or a heating mode, has the characteristics of rapid heating, controllable humidity in the drying chamber, energy saving, efficient dehumidification, etc., and is applied to drying of Chuzhou chrysanthemum and mushroom and recovery of volatile oil ofthe Chuzhou chrysanthemum at present.

Description

technical field [0001] The invention belongs to the technical field of refrigeration, drying and dehumidification, and relates to a heat pump drying equipment and a method for recovering volatile oil, in particular to a double evaporator drying equipment with closed cycle liquefaction and dehumidification technology, which is especially suitable for dehumidification and drying of food and characteristic agricultural products And volatile oil liquefaction recovery. Background technique [0002] The closed-loop double evaporator drying heat pump is composed of a fluorine system and a dryer frame to form an integrated machine. The main and secondary evaporators of the heat pump are connected in parallel to form the low-pressure area of ​​the fluorine system, which expands the capacity of the low-pressure area so that the secondary evaporator can obtain a lower temperature. The main evaporator acts as the main heat-absorbing heat exchanger to absorb the heat in the environment; ...

Claims

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Application Information

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IPC IPC(8): F26B9/02F26B21/00F26B21/02F26B25/00
CPCF26B9/02F26B21/002F26B21/004F26B21/02F26B25/006
Inventor 彭玉平孙艳辉贲宗友詹歌孙啸
Owner CHUZHOU UNIV
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