REFRIGERATION DEVICE USING CARBON DIOXIDE AS REFRIGERANT

Title:

REFRIGERATION DEVICE USING CARBON DIOXIDE AS REFRIGERANT

Document Type and Number:

Japanese Patent JP2004251557

Kind Code:

A

Abstract:

To provide a refrigeration device capable of performing the operation for independent cooling and heating, hot water supply cooling storage, cooling exhaust heat hot water supply, and heating hot water supply with high efficiency.

This refrigeration device comprises a primary refrigerant circuit constituted by connecting a heat exchanger for hot water supply and a third expansion valve in series in a state of bypassing a four-way valve, an outdoor heat exchanger and a first expansion valve, and using carbon dioxide as a refrigerant; a first secondary refrigerant circuit constituted by connecting the cooling storage heat exchanger and a cooling storage heat tank; and a second secondary refrigerant circuit constituted by connecting the hot water supply heat exchanger and the cooling storage heat tank.

Inventors:

NAKATANI KAZUO
KAWABE YOSHIKAZU

Application Number:

JP2003042853A

Publication Date:

September 09, 2004

Filing Date:

February 20, 2003

Export Citation:

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Assignee:

MATSUSHITA ELECTRIC IND CO LTD

International Classes:

F24H1/00; F25B1/00; F25B9/06; F25B11/02; F25B13/00; F25B29/00; F25B9/00; (IPC1-7): F25B29/00; F24H1/00; F25B11/02; F25B13/00

Attorney, Agent or Firm:

Fumio Iwahashi
Tomoyasu Sakaguchi
Hiroki Naito

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