Refrigeration cycle device for vehicle

Patent metadata

Field	Value
Publication number	US-2016159204-A1
Application number	US-201414907581-A
Country	US
Kind code	A1
Filing date	Jul 22, 2014
Priority date	Jul 31, 2013
Publication date	Jun 9, 2016
Grant date	—

Abstract

A refrigeration cycle device for a vehicle has a compressor, a first pump, a high-pressure side heat exchanger, a heating medium-outside air heat exchanger, and a controller. The compressor draws and discharges a refrigerant. The first pump draws and discharges a first heating medium. The high-pressure side heat exchanger heats the first heating medium by exchanging heat between a high-pressure refrigerant discharged from the compressor and the first heating medium. The heating medium-outside air heat exchanger exchanges heat between the first heating medium and outside air. The controller controls operation of the compressor and the first pump. The controller activates the first pump when an activation request of the compressor is made. The controller activates the compressor, after activating the first pump, when it is determined or estimated that a temperature of the first heating medium is lower than or equal to a first predetermined value.

First claim

What is claimed is:

1 . A refrigeration cycle device for a vehicle comprising:
a compressor drawing and discharging a refrigerant; a first pump drawing and discharging a first heating medium; a high-pressure side heat exchanger that heats the first heating medium by exchanging heat between a high-pressure refrigerant discharged from the compressor and the first heating medium; a heating medium-outside air heat exchanger that exchanges heat between the first heating medium and outside air; and a controller controlling operation of the compressor and the first pump, wherein the controller activates the first pump when an activation request of the compressor is made, and the controller activates the compressor, after activating the first pump, when it is determined or estimated that a temperature of the first heating medium is lower than or equal to a first predetermined value.

2 . The refrigeration cycle device for a vehicle according to claim 1 further comprising:
a blower generating an air flow that flows toward inside of a vehicle cabin;
a pressure reducer reducing pressure of the high-pressure refrigerant that is after exchanging heat in the high-pressure side heat exchanger; and
an air cooler cooling the air by using cold heat of a low-pressure refrigerant that is after being decompressed by the pressure reducer, wherein
the controller activates the blower, after activating the compressor, when it is determined or estimated that a temperature of the low-pressure refrigerant is lower than or equal to a second predetermined value.

3 . The refrigeration cycle device for a vehicle according to claim 1 further comprising:
a blower generating an air flow that flows toward inside of a vehicle cabin;
a pressure reducer reducing pressure of the high-pressure refrigerant that is after exchanging heat in the high-pressure side heat exchanger;
a second pump drawing and discharging a second heating medium;
a low-pressure side heat exchanger cooling the second heating medium by exchanging heat between the second heating medium and a low-pressure refrigerant that is after being decompressed by the pressure reducer; and
an air-cooling heat exchanger that cools the air by exchanging heat between the air and the second heating medium that is cooled by the low-pressure side heat exchanger.

4 . The refrigeration cycle device for a vehicle according to claim 3 , wherein,
the controller activates the blower, after activating the compressor, when it is determined or estimated that a temperature of the second heating medium is lower than or equal to a second predetermined value.

5 . The refrigeration cycle device for a vehicle according to claim 3 further comprising:
a bypass passage through which the second heating medium flows while bypassing the air-cooling heat exchanger; and
a heating medium flow rate ratio adjustment section that adjusts a flow rate ratio between the second heating medium flowing through the air-cooling heat exchanger and the second heating medium flowing through the bypass passage, wherein
the controller, after activating the compressor, controls operation of the heating medium flow rate ratio adjustment section such that the flow rate ratio of the second heating medium flowing through the bypass passage in a case where it is determined or estimated that the temperature of the second heating medium is lower than the second predetermined value is increased to be higher than the flow rate ratio of the second heating medium flowing through the bypass passage in a case where it is determined or estimated that the temperature of the second heating medium is higher than or equal to the second predetermined value.

6 . The refrigeration cycle device for a vehicle according to claim 1 , wherein
in at least one state of a state that an ignition switch of a vehicle is off and a state that an engine of the vehicle is stopped, the controller (i) activates the first pump when it is determined or estimated that the temperature of the first heating medium is higher than or equal to a third predetermined value, and (ii) stops the first pump, after activating the first pump, when it is determined or estimated that the temperature of the first heating medium is lower than or equal to a fourth predetermined value that is smaller than the third predetermined value.

7 . The refrigeration cycle device for a vehicle according to claim 1 , wherein
in a state that the ignition switch of the vehicle is on, that the engine of the vehicle is actuated, and that the compressor is stopped, the controller activates the first pump when it is determined or estimated that the temperature of the first heating medium is higher than or equal to a fifth predetermined value.

8 . A refrigeration cycle device for a vehicle comprising:
a compressor drawing and discharging a refrigerant; a first pump drawing and discharging a first heating medium; a high-pressure side heat exchanger that heats the first heating medium by exchanging heat between the first heating medium and a high-pressure refrigerant discharged from the compressor; a heating medium-outside air heat exchanger exchanging heat between the first heating medium and outside air; and a controller controlling operation of the compressor and the first pump, wherein in at least one state of a state that an ignition switch of a vehicle is off and a state that an engine of the vehicle is stopped, the controller (i) activates the first pump when it is determined or estimated that a temperature ) of the first heating medium is higher than or equal to a third predetermined value, and (ii) stops the first pump, after activating the first pump, when it is determined or estimated that the temperature of the first heating medium is lower than or equal to a fourth predetermined value that is smaller than the third predetermined value.

9 . The refrigeration cycle device for a vehicle according to claim 1 further comprising
an outside air blower blowing outside air to the heating medium-outside air heat exchanger, wherein
the controller further activates the outside air blower when activating the first pump.

10 . A refrigeration cycle device for a vehicle comprising:
a compressor drawing and discharging a refrigerant; a high-pressure side heat exchanger that makes a high-pressure refrigerant discharged from the compressor exchange heat; a pump drawing and discharging a heating medium; a pressure reducer reducing pressure of the high-pressure refrigerant that is after exchanging heat in the high-pressure side heat exchanger; a low-pressure side heat exchanger that cools the heating medium by exchanging heat between the heating medium and a low-pressure refrigerant that is after decompressed by the pressure reducer; a blower generating an air flow that flows toward inside of a vehicle cabin; an air-cooling heat exchanger cooling the air by exchanging heat between the air and the heating medium that is cooled by the low-pressure side heat exchanger; and a controller controlling operation of the compressor and the pump, wherein the controller activates the compressor when an activation request of the compressor is made, and the controller activates the blower, after activating the compressor, when it is determined or estimated that a temperature of the heating medium is lower than or equal to a predetermined value.

11 . A refrigeration cycle device for a vehicle comprising:
a compressor drawing and discharging a refrigerant; a first pump and a second pump drawing and discharging a heating medium; a high-pressure side heat exchanger that heats the heating medium by exchanging heat between the heating medium and a

Assignees

• Denso Corp

Inventors

• Katoh Yoshiki
• Makihara Masamichi
• Enomoto Norihiko
• Kuwayama Kazutoshi
• Sugimura Kengo

Classifications

• B60H2001/3272

  to control the revolving speed of a compressor · CPC title

• F25B2600/0251

  with on-off operation · CPC title

• F25B49/022

  Compressor control arrangements · CPC title

• B60H1/3211 Primary

  for increasing the efficiency of a vehicle refrigeration cycle · CPC title

• F25B1/00

  Compression machines, plants or systems with non-reversible cycle (F25B3/00, F25B5/00, F25B6/00, F25B7/00, F25B9/00 take precedence) · CPC title