THERMAL MANAGEMENT SYSTEM FOR VEHICLE

• US 20170008373A1
• Filed: 02/23/2015
• Published: 01/12/2017
• Est. Priority Date: 03/05/2014
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: MAKIHARA, Masamichi, YAMANAKA, Takashi, OMI, Yasumitsu, MIURA, Koji, ENOMOTO, Norihiko, KAKEHASHI, Nobuharu
• Granted Patent: US 10,065,478 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60H 1/00385 for vehicles having an electrical drive, e.g. hybrid or fuel cell
• CPC Class Codes: B60H 1/00807 the input being a specific way of measuring or calculating an air or coolant temperature
• CPC Class Codes: B60H 1/00828 Ventilators, e.g. speed control B60H1/00864 takes precedence
• CPC Class Codes: B60H 1/00885 Controlling the flow of heating or cooling liquid, e.g. valves or pumps B60H1/00899 takes precedence; constructions of valves B60H1/00485
• CPC Class Codes: B60H 1/00899 Controlling the flow of liquid in a heat pump system controlling the properties of the refrigerant liquid, e.g. pressure or temperature, B60H1/3204
• CPC Class Codes: B60H 1/32284 comprising two or more secondary circuits, e.g. at evaporator and condenser side
• CPC Class Codes: B60H 2001/00928 comprising a secondary circuit
• CPC Class Codes: B60K 11/02 with liquid cooling
• CPC Class Codes: B60K 2001/003 with means for cooling the electrical propulsion units
• CPC Class Codes: B60K 2001/005 the electric storage means
• CPC Class Codes: B60K 2001/006 the electric motors
• CPC Class Codes: B60K 6/22 characterised by apparatus, components or means specially adapted for HEVs
• CPC Class Codes: B60Y 2200/92 Hybrid vehicles
• CPC Class Codes: B60Y 2400/88 Air conditioners, e.g. compressor drives
• CPC Class Codes: B60Y 2400/89 Cooling systems, e.g. fan drives
• CPC Class Codes: F25B 1/00 Compression machines, plants or systems with non-reversible cycle F25B3/00, F25B5/00, F25B6/00, F25B7/00, F25B9/00 take precedence
• CPC Class Codes: Y10S 903/904 Component specially adapted for hev

Abstract

A thermal management system for a vehicle includes a high-temperature side pump that draws and discharges a heat medium, a compressor that draws and discharges a refrigerant in a refrigeration cycle, a high-pressure side heat exchanger that exchanges heat between a high-pressure side refrigerant in the refrigeration cycle and the heat medium circulated by the high-temperature side pump, a heat medium-outside air heat exchanger that exchanges heat between the heat medium circulated by the high-temperature side pump and outside air, and a pump control unit that controls an operation of the high-temperature side pump such that the operation of the high-temperature side pump is continued even after the compressor is stopped. Thus, the cycle efficiency exhibited when restarting the compressor can be improved.

Claims

1. A thermal management system for a vehicle, comprising:

a first pump that draws and discharges a heat medium;

a compressor that draws and discharges a refrigerant in a refrigeration cycle;

a high-pressure side heat exchanger that exchanges heat between a high-pressure side refrigerant in the refrigeration cycle and the heat medium circulated by the first pump;

a heat medium-outside air heat exchanger that exchanges heat between the heat medium circulated by the first pump and outside air; and

a pump control unit that controls an operation of the first pump such that the operation of the first pump is continued even after the compressor is stopped wherein

in a case where the operation of the first pump is continued after the compressor is stopped, the pump control unit stops the first pump when a difference obtained by subtracting a temperature of the outside air from a temperature of the heat medium is determined to be equal to or less than a first predetermined value.

3. The thermal management system for a vehicle according to claim 1, further comprising:

a second pump that draws and discharges the heat medium;

a low-pressure side heat exchanger that exchanges heat between a low-pressure side refrigerant in the refrigeration cycle and the heat medium circulated by the second pump; and

a switching device switching between a first circulation state in which the heat medium circulates between the heat medium-outside air heat exchanger and the first pump and a second circulation state in which the heat medium circulates between the heat medium-outside air heat exchanger and the second pump, wherein

when the switching device switches to the second circulation state, the pump control unit controls an operation of the second pump such that the operation of the second pump is continued even after the compressor is stopped.

4. The thermal management system for a vehicle according to claim 3, wherein

in a case where the operation of the second pump is continued after the compressor is stopped, the pump control unit stops the second pump when a difference obtained by subtracting a temperature of the heat medium from a temperature of the outside air is determined to be equal to or less than a second predetermined value.

5. The thermal management system for a vehicle according to claim 1, further comprising:

an outside-air blower that blows the outside air to the heat medium-outside air heat exchanger; and

an outside-air blowing control unit that controls an operation of the outside-air blower such that the operation of the outside-air blower is continued even after the compressor is stopped.

7. The thermal management system for a vehicle according to claim 4, further comprising:

an outside-air blower that blows the outside air to the heat medium-outside air heat exchanger; and

an outside-air blowing control unit that controls an operation of the outside-air blower such that the operation of the outside-air blower is continued even after the compressor is stopped, wherein

in a case where the operation of the outside-air blower is continued after the compressor is stopped, the outside-air blowing control unit stops the outside-air blower when a difference obtained by subtracting a temperature of the heat medium from a temperature of the outside air is determined to be equal to or less than the second predetermined value.

8. The thermal management system for a vehicle according to claim 1, wherein

the compressor is driven by a driving force generated from the engine.

2. (canceled)

6. The thermal management system for a vehicle according to claim 2, further comprising:

an outside-air blower that blows the outside air to the heat medium-outside air heat exchanger; and

an outside-air blowing control unit that controls an operation of the outside-air blower such that the operation of the outside-air blower is continued even after the compressor is stopped, wherein

in a case where the operation of the outside-air blower is continued after the compressor is stopped, the outside-air blowing control unit stops the outside-air blower when a difference obtained by subtracting a temperature of the outside air from a temperature of the heat medium is determined to be equal to or less than the first predetermined value.