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Mixed refrigeration system and quick freezing method thereof

A technology of mixed refrigeration and freezing chambers, which is applied in the direction of refrigerators, refrigeration components, refrigeration and liquefaction, etc., and can solve the problems of high operating costs and poor freezing quality

Pending Publication Date: 2021-05-18
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a hybrid refrigeration system and quick freezing method to overcome the defects of poor freezing quality and high operating cost in the prior art

Method used

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  • Mixed refrigeration system and quick freezing method thereof
  • Mixed refrigeration system and quick freezing method thereof
  • Mixed refrigeration system and quick freezing method thereof

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Embodiment

[0093] One object of the present invention is to propose a hybrid refrigeration system (hereinafter referred to as the hybrid quick-freezing system) that combines the contact quick-freezing method and the circulating spraying method.

[0094] The hybrid refrigeration system system of the present invention comprises: a freezing chamber, a carbon dioxide gas supply tank, a contact cascade heat exchanger, a freezing chamber, a regulating valve, an infusion pump, a exhaust gas recovery device, an exhaust port, a spray pipe rack, Food trays, carbon dioxide quick-freezing circulation system, contact quick-freezing system, wherein the contact quick-freezing system includes: the first compressor, the oil separator, the first pipeline of the three-way condenser, the regenerator, the solenoid valve, the contact cascade The heat exchanger (evaporator pipeline), the condenser of the carbon dioxide quick freezing cycle and the evaporator of the contact quick freezing system are cascaded to ...

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Abstract

Provided are a mixed refrigeration system and a quick freezing method thereof. The mixed refrigeration system mainly comprises a freezing chamber (16), a contact type cascade heat exchanger (21), a contact type quick freezing system and a carbon dioxide quick freezing circulating system, wherein a tray is arranged in the freezing chamber (16), a contact type cascade heat exchanger (21) is arranged below the tray, the contact type cascade heat exchanger (21) is formed by overlapping an evaporator of a contact type quick-freezing system and a condenser of a carbon dioxide quick-freezing circulating system and serves as a tray support, and the tray is placed on the support. According to the invention, objects to be frozen in different temperature zones are frozen, so that the cooling rate of the objects to be frozen in the cooling zone and the crystallization temperature zone is changed, and the quality of the objects to be frozen is better preserved. The contact type quick-freezing system and the carbon dioxide spraying type quick-freezing system are overlapped, the condensation pressure of carbon dioxide is reduced, and the requirement for high pressure resistance of condensation equipment is lowered.

Description

technical field [0001] The invention relates to a mixed refrigeration system and a quick-freezing method thereof, and relates to quick-freezing and fresh-keeping technology, in particular to a mixed quick-freezing system and a freezing method of contact quick-freezing and circulating spraying. Background technique [0002] Liquid carbon dioxide spray quick-freezing technology utilizes the characteristics of high latent heat of vaporization of liquid carbon dioxide, low sublimation temperature of dry ice (-78.5°C), stable chemical properties, and low freeze-drying consumption, which can promote rapid cooling and freezing of frozen objects in a short period of time. But at present, most of the devices that do not have co2 gas recovery are mainly to discharge the sprayed low-temperature gas into the environment, which leads to low utilization of cold sources, and the emission of a large amount of co2 will aggravate the global warming effect on the atmosphere, and the emission of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25D11/00F25D17/02F25D17/06F25D19/04F25D29/00F25B9/00F25B41/20F25B41/30F25B49/02
CPCF25D11/00F25D17/02F25D17/062F25D19/04F25D29/005F25B9/008F25B49/02
Inventor 房斌张信荣章学来郑秋云
Owner PEKING UNIV
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