Refrigerant cycle device
First Claim
1. A refrigerant cycle device for a vehicle, adapted to adjust a temperature of air blown into an air-conditioning target space by utilizing heat of refrigerant circulating through a refrigerant cycle of the refrigerant cycle device, the refrigerant cycle device comprising:
- a compressor configured to compress the refrigerant and to discharge the compressed refrigerant;
a discharge capacity control portion configured to control a discharge capacity of the compressor;
a noise determination portion configured to determine whether a noise audible to a passenger, other than a refrigerant passing noise generated from the refrigerant when the refrigerant circulates through the refrigerant cycle, is in a low noise state in which a level of the audible noise other than the refrigerant passing noise is equal to or lower than a predetermined noise level;
a decompressor decompressing the compressed refrigerant discharged by the compressor; and
a pressure sensor being disposed between the compressor and the decompressor and detecting a pressure of the compressed refrigerant, whereinthe discharge capacity control portion performs a normal control in which the discharge capacity of the compressor is increased in accordance with an increase of an air-conditioning thermal load of the air-conditioning target space,the discharge capacity control portion performs a gradual activation control in which the discharge capacity of the compressor is set to be lower than the discharge capacity determined in the normal control, when the noise determination portion determines that the audible noise other than the refrigerant passing noise is in the low noise state at an activation time of the compressor, andthe discharge capacity control portion sets an initial value of the discharge capacity in the gradual activation control at the activation time of the compressor to be lower than an initial value of the discharge capacity in the normal control at the activation time of the compressor, based on the pressure detected by the pressure sensor at the activation time of the compressor.
1 Assignment
0 Petitions
Accused Products
Abstract
A refrigerant cycle device for a vehicle includes a compressor which compresses and discharges refrigerant, a discharge capacity control portion which controls a discharge capacity of the compressor. The refrigerant cycle device further includes a noise determination portion which determines whether an audible noise other than a refrigerant passing noise is in a low noise state, and/or a load determination portion which determines whether an air-conditioning thermal load is in a high load state. The discharge capacity control portion performs a gradual activation control in which the discharge capacity of the compressor is set to be lower than that determined in a normal control, when the noise determination portion determines that the audible noise is in the low noise state, and/or when the load determination portion determines that the air-conditioning thermal load is in the high load state, at an activation time of the compressor.
27 Citations
28 Claims
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1. A refrigerant cycle device for a vehicle, adapted to adjust a temperature of air blown into an air-conditioning target space by utilizing heat of refrigerant circulating through a refrigerant cycle of the refrigerant cycle device, the refrigerant cycle device comprising:
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a compressor configured to compress the refrigerant and to discharge the compressed refrigerant; a discharge capacity control portion configured to control a discharge capacity of the compressor; a noise determination portion configured to determine whether a noise audible to a passenger, other than a refrigerant passing noise generated from the refrigerant when the refrigerant circulates through the refrigerant cycle, is in a low noise state in which a level of the audible noise other than the refrigerant passing noise is equal to or lower than a predetermined noise level; a decompressor decompressing the compressed refrigerant discharged by the compressor; and a pressure sensor being disposed between the compressor and the decompressor and detecting a pressure of the compressed refrigerant, wherein the discharge capacity control portion performs a normal control in which the discharge capacity of the compressor is increased in accordance with an increase of an air-conditioning thermal load of the air-conditioning target space, the discharge capacity control portion performs a gradual activation control in which the discharge capacity of the compressor is set to be lower than the discharge capacity determined in the normal control, when the noise determination portion determines that the audible noise other than the refrigerant passing noise is in the low noise state at an activation time of the compressor, and the discharge capacity control portion sets an initial value of the discharge capacity in the gradual activation control at the activation time of the compressor to be lower than an initial value of the discharge capacity in the normal control at the activation time of the compressor, based on the pressure detected by the pressure sensor at the activation time of the compressor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A refrigerant cycle device for a vehicle, adapted to adjust a temperature of air blown into an air-conditioning target space by utilizing heat of refrigerant circulating in a refrigerant cycle of the refrigerant cycle device, the refrigerant cycle device comprising:
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a compressor configured to compress refrigerant and to discharge the compressed refrigerant; a discharge capacity control portion configured to control a discharge capacity of the compressor; a load determination portion configured to determine whether an air-conditioning thermal load of the air-conditioning target space is in a high load state in which the air-conditioning thermal load is equal to or higher than a predetermined air-conditioning thermal load; a decompressor decompressing the compressed refrigerant discharged by the compressor; and a pressure sensor being disposed between the compressor and the decompressor and detecting a pressure of the compressed refrigerant, wherein the discharge capacity control portion performs a normal control, in which the discharge capacity of the compressor is increased in accordance with an increase of the air-conditioning thermal load, the discharge capacity control portion performs a gradual activation control, in which the discharge capacity of the compressor is set to be lower than the discharge capacity determined in the normal control, when the load determination portion determines that the air-conditioning thermal load is in the high load state at an activation time of the compressor, and the discharge capacity control portion sets an initial value of the discharge capacity in the gradual activation control at the activation time of the compressor to be lower than an initial value of the discharge capacity in the normal control at the activation time of the compressor, based on the pressure detected by the pressure sensor at the activation time of the compressor. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification