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Title:
HEAT PUMP TYPE AIR-CONDITIONING AND HEATING DEVICE FOR VEHICLE
Document Type and Number:
Japanese Patent JP3275661
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To perform cooling operation without enhancing a compressor frequency more than necessary by providing a means to perform operation on an operation starting frequency of a compressor on the basis of a target blowoff temperature and an initial blowoff temperature.
SOLUTION: Cooling operation finishes, and when a compressor 31 is stopped, a refrigerant is prevented from flowing in a heat absorbing cabin inside heat exchanger 35, and a low temperature-low pressure refrigerant existing in the heat absorbing cabin inside heat exchanger 35 when cooling is stopped, is sealed still in its condition, and is maintained in a low temperature condition for a while. Operation is performed on a target blowoff temperature from a cooling load in a cabin, and an initial blowoff temperature at cooling operation starting time is anticipated by an initial blowoff temperature anticipating means. Operation is performed on an operation frequency of the compressor 31 by using at least the target blowoff temperature and the initial blowoff temperature as a parameter. Therefore, cooling operation can be performed without enhancing a compressor frequency more than necessary.


Inventors:
Takayoshi Matsuoka
Application Number:
JP28007495A
Publication Date:
April 15, 2002
Filing Date:
October 27, 1995
Export Citation:
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Assignee:
Nissan Motor Co., Ltd
International Classes:
B60H1/22; B60H1/32; F25B13/00; (IPC1-7): B60H1/22; B60H1/32; F25B13/00
Domestic Patent References:
JP5294138A
JP7276978A
JP6255337A
JP455120A
JP2122161A