Bidirectional differential pressure type fruit and vegetable cold shock preprocessing device
A pretreatment device, differential pressure technology, applied in the direction of preservation of fruits/vegetables by freezing/refrigeration, etc., can solve the problems of different positions of fruits and vegetables, slow cooling rate, etc., so as to reduce the total time, increase the cooling rate, and improve the convection Effect of heat transfer coefficient
Active Publication Date: 2013-05-01
TIANJIN UNIV
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[0003] The purpose of the present invention is to provide a two-way low-temperature shock device combining air flow direction conversion and pressure difference fan to solve the problems of slow cooling rate and different temperature of fruits and vegetables in the pre-cooling process
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[0011] The structural principles of the present invention will be further described below in conjunction with the accompanying drawings and through embodiments.
[0012] Two-way pressure difference type fruit and vegetable cold shock pretreatment device, the system consists of an air treatment chamber, a blower, a pressure difference fan, an air flow direction converter, a fruit and vegetable treatment tank, and an evaporator 3, a compressor 4, a condenser 5, and an expansion valve 6. The connections make up the refrigeration system. The system connection structure is: blower 2 is placed in the upper space of air treatment room 1, evaporator 3 in the refrigeration system is placed under the blower in the middle of the air treatment room, and a water receiving tray 7 is provided at the bottom of the air treatment room. The air flow direction converter 8 includes A, B, C, D, 4 openings, and the upper side opening A of the air flow direction converter is connected with the blower...
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The invention discloses a bidirectional differential pressure type fruit and vegetable cold shock preprocessing device. The system connection structure is characterized by that: an air feeder is arranged at an upper space of an air processing chamber; an evaporator in a refrigerating system is arranged at a middle part of the air processing chamber; and a water receiving tray is arranged at the bottom of the air processing chamber. An air flow direction converter comprises a plurality of openings, of which an upper side opening is connected with the air feeder through an air channel; a lower side middle opening is connected with a differential pressure fan through the air channel; the lower side left end and right end openings are connected with both sides of a fruit and vegetable processing groove through the air channel, respectively. A pulling rod is arranged in the air flow direction converter; the pulling rod is connected and fixed with an arched valve; the position of the archedvalve is adjusted by moving the pulling rod in the air flow direction converter, such that conversion of air flow direction is realized. With the air feeder and the differential pressure fan, air of low temperature is forced to pass through the fruit and vegetable processing groove, and the air flow direction in the fruit and vegetable processing groove is converted through the air flow directionconverter, such that the cooling speed in fruit and vegetable cold shock process is increased and the uniformity of temperature of fruit and vegetable at different positions in the fruit and vegetable processing groove is improved.
Description
technical field [0001] The invention belongs to the fresh-keeping technology of fruits and vegetables, and in particular relates to a device for cold-preserving fruits and vegetables by using a low-temperature air flow and a pressure difference fan. Background technique [0002] At present, people pay more and more attention to the preservation of fruits and vegetables and the safety of eating, so the requirements for preservation methods and special equipment are getting higher and higher. Seeking a technical treatment method without chemical pollution and residue has become the focus of research in this industry , wherein the pre-cold treatment of fruits and vegetables has attracted people's attention. The shock medium is an important factor affecting the shock process, and the common shock medium mainly includes ice-water mixture and low-temperature air. Everyone in the industry knows that low-temperature air as a processing medium has the advantages of being recyclable ...
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IPC IPC(8): A23B7/04
Inventor 杨昭陈爱强张娜尹海蛟
Owner TIANJIN UNIV