Refrigerant cycling device

• US 7,000,424 B2
• Filed: 10/09/2003
• Issued: 02/21/2006
• Est. Priority Date: 12/05/2002
• Status: Expired due to Term

• Current Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Inventors: Sato, Kazuya, Fujiwara, Kazuaki, Yamanaka, Masaji, Yamaguchi, Kentaro, Yamasaki, Haruhisa, Matsumoto, Kenzo, Tomiuka, Akifumi
• Primary Examiner(s): Tyler, Cheryl
• Assistant Examiner(s): Zec, Filip
• Application Number:
  US10/683,758
• Publication Number:
  US 20040107720A1
• Time in Patent Office: 866 Days
• Field of Search: 623/246, 621/962, 418/7, 418/8, 418/60, 418/83, 417/251, 417/243, 417/313, 417/410.3
• US Class Current: 62/324.6
• CPC Class Codes: F04C 18/3564 the surfaces of the inner and outer member, forming the working space, being surfaces of revolution
• CPC Class Codes: F25B 1/10 with multi-stage compression with cascade operation F25B7/00
• CPC Class Codes: F25B 13/00 Compression machines, plants or systems, with reversible cycle defrosting cycles F25B47/02
• CPC Class Codes: F25B 2309/061 with cycle highest pressure above the supercritical pressure
• CPC Class Codes: F25B 2313/02741 using one four-way valve
• CPC Class Codes: F25B 2400/04 Refrigeration circuit bypassing means
• CPC Class Codes: F25B 2400/05 Compression system with heat exchange between particular parts of the system
• CPC Class Codes: F25B 2400/072 Intercoolers therefor
• CPC Class Codes: F25B 31/006 Cooling of compressor or motor
• CPC Class Codes: F25B 40/00 Subcoolers, desuperheaters or superheaters
• CPC Class Codes: F25B 9/008 the refrigerant being carbon dioxide

Abstract

A refrigerant cycling device is provided. The refrigerant cycling device comprises a compressor, an intermediate cooling circuit and a three-way valve device. The compressor is connected to a heat exchanger and a depressurizing means, for performing a cooling operation and a heating operation. The compressor further comprises a first and a second rotary compression elements within a sealed container, and a refrigerant that is compressed and discharged by the first rotary compression element is introduced to the second rotary compression element. The intermediate cooling circuit is used for radiating heat of the refrigerant discharged from the first rotary compression element. The three-way valve device for opening a passage of the intermediate cooling circuit during the cooling operation. In this way, the coefficient of production (COP) during the cooling operation can be improved.

Claims

1. A refrigerant cycling device, comprising:

a compressor, connected to at least two heat exchangers and a depressurizing means, for performing a cooling operation and a heating operation, wherein the compressor further comprises a first and a second rotary compression elements, and a refrigerant that is compressed and discharged by the first rotary compression element is introduced to the second rotary compression element;

an intermediate cooling circuit for radiating heat of the refrigerant discharged from the first rotary compression element;

a first valve device for opening a passage that allows the refrigerant discharged from the first rotary compression element passing through the intermediate cooling circuit before entering one of the two heat exchangers during the cooling operation; and

a second valve device for inhibiting a heated refrigerant from the second rotary compression element to pass through the intermediate cooling circuit before entering one of the two heat exchangers during the heating operation.

2. The refrigerant cycling device of claim 1, wherein the heat exchangers are constructed by a first heat exchanger at a user side and a second heat exchanger at a heat source side, and the refrigerant cycling device further comprises an internal heat exchanger for cycling the refrigerant discharged from the first rotary compression element through the second heat exchanger at a heat source side, the depressurizing means and the first heat exchanger at a user side during the cooling operation, and for cycling the refrigerant discharged from the compressor through the first heat exchanger at a user side, the depressurizing means and the second heat exchanger at a heat source side during the heating operation, so as to perform a heat exchange between the refrigerant flowing between the depressurizing means and the second heat exchanger at a heat source side and the refrigerant flowing between the compressor and the first heat exchanger at a user side.

3. The refrigerant cycling device of claim 1, wherein carbon oxide is used as the refrigerant.