Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Freezer evaporator apparatus

a technology of evaporator and freezer, which is applied in the direction of domestic cooling apparatus, lighting and heating apparatus, refrigeration components, etc., can solve the problems of reducing the lifespan of the unit, accelerating wear and tear of the crankshaft and connecting rod, and increasing operating costs, so as to reduce the “pull down” time and increase the transfer area

Inactive Publication Date: 2013-07-04
STANDEX INT CORP
View PDF6 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention provides an ultra-high efficiency (ULT) freezer evaporator apparatus that prevents a low stage compressor from running in a vacuum, reduces the "pull down" time, and increases the transfer area between the evaporator tubing and the contact surface on the unit to improve heat transfer.

Problems solved by technology

This vacuum can cause accelerated wear and tear on the crankshaft and connecting rod.
Of course, operating in such a manner is likely to adversely affect the reliability of the compressor.
This requires the compressor to run longer as well thus reducing the lifespan of the unit and also increasing operating costs.
Therefore, this design requires a greater amount of time to absorb the heat from inside the unit and transfer this heat from the condenser to the surrounding room.
This will also increase the time the compressor must run and increases operating cost.
There is no ULT freezer unit presently available that solves the problems noted above.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Freezer evaporator apparatus
  • Freezer evaporator apparatus
  • Freezer evaporator apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020]Referring now to FIG. 8 where invention 10 is shown in combination with a typical ULT freezer such as manufactured by Nor-Lake, a Wisconsin Company. This freezer is a two-stage compressor system as shown. This unit is powered by a low noise, high performance cascade refrigeration system using two 1 Horsepower hermetically sealed compressors 40, 50. The high stage compressor 40 is an Emerson Model No. RFT42CIE-PFV for 230-volt units or the RFT42CIE-PFA for the 115-volt unit. The low stage compressor 50 is also made by Emerson using the same model as above.

[0021]When the freezer sensor units call for cooling, high stage compressor 40 runs by itself until heat exchanger 42 reaches a temperature of −34 degrees Centigrade. At that time, the controller will start low stage compressor 50 to run with the high stage. The low stage refrigerant will begin to circulate through oil separator 56, downstream to heat exchanger 42 and through filter dryer 60 then to distributor 32 where the re...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

An ultra low temperature freezer evaporator (ULT) apparatus that has a triple feed capillary tube system. The ULT apparatus prevents the low stage compressor from running in a vacuum. The invention significantly reduces the “pull down” time. Further, the ULT freezer evaporator apparatus significantly increases the transfer area between the evaporator tubing and the contact surface on the unit to assist the transfer of heat from the refrigerated unit through the condenser to the surrounding room.

Description

[0001]This application claims benefit of U.S. Provisional Application Ser. No. 61 / 581,234 filed Dec. 29, 2011, pursuant to 35 USC §119(e).FIELD OF THE INVENTION[0002]This invention relates to ultra low temperature freezer units, in particular, ultra low temperature (ULT) freezers that have an improved evaporator with an improved capillary feed system on the low stage compressor assembly.BACKGROUND OF THE INVENTION[0003]Ultra low temperature (ULT) freezers are typically designed to store and protect critical biological materials. Minus 86° C. freezers are a common product produced by several manufacturers. This type of freezer as well as other ULT freezers operating at even colder temperatures is used for the storage of blood component additives, bone marrow, insect cell culture, mammalian cell culture, nucleic acids (DNA / RNA), sperm, fertilized ova, tissues and viruses.[0004]Referring to FIGS. 1 and 2, a typical prior art ULT freezer 80 has one long continuous run of evaporator tubi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): F25B39/02
CPCF25B5/02F25B7/00F25B41/067F25B39/028F25D23/061F25B2341/0661F25B2500/01F25D11/04F25B41/385F25B41/37
Inventor JONES, RONALD WAYNE
Owner STANDEX INT CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com