Freezer with liquid cryogen refrigerant and method

A technology of liquid refrigerant and freezer, which is applied in household refrigeration equipment, preparation and application of test samples, and can solve problems such as loss of biological materials and increased power demand for equipment

Active Publication Date: 2011-09-21
엠브이이바이오로지컬솔루션스유에스엘엘씨
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This increases the additional power requirements of the device
Furthermore, in the event of a power ...

Method used

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  • Freezer with liquid cryogen refrigerant and method
  • Freezer with liquid cryogen refrigerant and method
  • Freezer with liquid cryogen refrigerant and method

Examples

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Embodiment Construction

[0010] exist figure 1 In general, 10 denotes an embodiment of the freezer using a liquid refrigerant according to the present invention. The freezer includes an inner container 12 defining a storage compartment 14 . An outer cover 16 generally surrounds the container 12 defining an insulating space 18 between the inner container 12 and the outer cover 16 . A vacuum is preferably drawn in the insulating space 18 such that the storage chamber 14 is insulated. In alternative embodiments, the vacuum insulation space 18 may be supplemented or replaced with insulating materials known in the art, including but not limited to foam or fiberglass.

[0011] An insulating plug or cover 20 is removably disposed within an off-center access opening 22 of the freezer allowing access to the storage chamber 14 . The lid 20 is preferably mounted to the remainder of the freezer by hinged brackets 24 . A rotating disk 26 is disposed within the storage compartment 14 and holds stored items whil...

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PUM

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Abstract

The invention relates to a freezer with liquid cryogen refrigerant and method. The freezer includes an inner vessel defining a storage chamber and an outer jacket generally surrounding the inner vessel so that an insulation space is defined there between. A heat exchanger is positioned in a top portion of the storage chamber and has an inlet in communication with a supply of the liquid cryogen refrigerant so that the liquid cryogen refrigerant selectively flows through the heat exchanger to cool the storage chamber while being vaporized. A purge line is in communication with the outlet of the heat exchanger and includes a purge outlet positioned over the exterior of the heat exchanger. A purge valve is positioned within the purge line so that the vaporized liquid cryogen from the heat exchanger is selectively directed to the exterior of the heat exchanger to reduce ice formation on the heat exchanger.

Description

technical field [0001] The present invention relates generally to freezers, and in particular to freezers using liquid refrigerant as the refrigerant. Background technique [0002] Freezers used to store biological specimens, samples, materials, products, etc. usually use cryogenic liquids as refrigerants. Such freezers are typically characterized by a reservoir of liquid refrigerant, such as liquid nitrogen, in the bottom of the storage chamber of the freezer, with the product stored above the reservoir or partially submerged in the cryogenic liquid . The freezer is also typically characterized by a double walled, vacuum insulated construction so that the storage chamber is well insulated. This freezer provides storage temperatures ranging from approximately -90°C to -195°C. [0003] A disadvantage of prior art liquid refrigerant freezers is the inability to directly control the temperature. The temperature is controlled by maintaining the amount of cryogenic liquid in ...

Claims

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Application Information

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IPC IPC(8): F25D3/10
CPCF25D2700/12F25D21/04F25D3/105F25D29/001F25D21/10G01N1/42
Inventor 杰弗里.S.布鲁克斯
Owner 엠브이이바이오로지컬솔루션스유에스엘엘씨
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