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

Heat pump drier

A technology of heat pump drying and drying chamber, which is used in heat pump, drying gas arrangement, drying and other directions

Inactive Publication Date: 2008-07-09
TIANJIN UNIV
View PDF0 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current application of the heat pump dryer system is conventional working fluid

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
  • Heat pump drier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0009] Below with Chinese cabbage seed drying as specific embodiment, content of the present invention is further described:

[0010] The dried material cabbage seeds are placed on the conveyor belt in the drying chamber. The initial moisture content of the cabbage seeds is 30%, and they are dried and dehydrated to a moisture content of 5%.

[0011] After compressor 1 is turned on, the CO 2 The working medium is compressed by the compressor 1 into a high-temperature and high-pressure working medium with a pressure of 9 MPa. After the temperature is 75°C, it enters the air source gas cooler 2-1 for the first cooling down to 45°C; at the same time, the temperature is 30°C and the humidity is 80%. The air is heated to a temperature of 45°C, the humidity drops to 35%, and the CO 2 After exchanging heat with the air, the working fluid enters the second air source gas cooler 2-2 for the second cooling down to 25°C. At the same time, the air with a temperature of 20°C and a humidity...

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

The invention discloses a heat pump drying machine with high-efficient and environmentally friendly CO2 as the working fluid. The high-pressure side of a compressor is connected with the working fluid sides of two air source-based gas coolers in series and then connected with an inner heat exchanger, and the high-pressure working fluid side of the inner heat exchanger is connected with the low-pressure working fluid side of the inner heat exchanger via an electronic expansion valve and an evaporator and then connected with the low-pressure side of the compressor, so as to form a working fluid circulating system. The air side of the evaporator is connected with the second air source-based gas cooler in series and then connected with the inlet of a first drying room, the outlet of the first drying room is connected with the first air source-based gas cooler in series and then connected with the inlet of a second drying room, the outlet of the second drying room is connected with an external heat exchanger in series and then connected with the air side inlet of the evaporator, so as to form an air circulating system. The invention takes advantage of the heat exchange characteristics of the heap pump with CO2 as the working fluid with two-stage drying design, and reduces the temperature of the working fluid at the outlet of the gas cooler, so as to reasonably utilize energy, perform continuous drying and shorten drying time.

Description

technical field [0001] The invention belongs to drying equipment, in particular to a device for drying by means of a heat pump. Background technique [0002] Heat pump drying equipment has developed rapidly due to its characteristics of being closed, clean, high utilization rate of primary energy, high heating temperature, and easy capacity adjustment. However, the current application of the heat pump dryer system is a conventional working fluid. The working fluids commonly used in the refrigeration heat pump industry are CFCs (chlorofluorocarbons) and HCFCs (hydrochlorofluorocarbons). Because of their damaging effects on the ozone layer and their greenhouse effect, scientists around the world are focusing on their alternatives. Among them, carbon dioxide has been reintroduced into the refrigeration and heat pump industry due to its excellent environmental protection characteristics, good heat transfer and flow properties. At present, the natural working substance CO 2 Kn...

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): F26B21/04F26B23/10F25B30/02
Inventor 李敏霞马一太苏维诚
Owner TIANJIN UNIV
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