Heat control system

• US 7,048,044 B2
• Filed: 03/09/2004
• Issued: 05/23/2006
• Est. Priority Date: 03/10/2003
• Status: Expired due to Fees

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Ban, Koichi, Yamanaka, Yasushi, Suzuki, Takahisa, Kameoka, Teruhiko
• Primary Examiner(s): Ford, John K.
• Application Number:
  US10/797,691
• Publication Number:
  US 20040194949A1
• Time in Patent Office: 805 Days
• Field of Search: 165/202, 165/42, 165/43, 165/240, 165/241, 165/242, 622/386, 621/964, 623/231, 237/2.B
• US Class Current: 165/202
• CPC Class Codes: B60H 1/00314 Arrangements permitting a rapid heating of the heating liquid B60H1/00492, B60H1/03 take precedence; aiding engine start by heating of engine coolants F02N19/10
• 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 2001/00949 comprising additional heating/cooling sources, e.g. second evaporator
• CPC Class Codes: B60L 1/003 to auxiliary motors, e.g. for pumps, compressors
• CPC Class Codes: B60L 1/02 to electric heating circuits
• CPC Class Codes: B60L 2210/40 DC to AC converters
• CPC Class Codes: B60L 2240/34 Cabin temperature
• CPC Class Codes: B60L 2240/36 Temperature of vehicle components or parts
• CPC Class Codes: B60L 2240/425 Temperature
• CPC Class Codes: B60L 2240/445 Temperature
• CPC Class Codes: B60L 2240/545 Temperature
• CPC Class Codes: B60L 2240/662 Temperature
• CPC Class Codes: B60L 3/0023 Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
• CPC Class Codes: B60L 3/0046 relating to electric energy storage systems, e.g. batteries or capacitors
• CPC Class Codes: B60L 3/0053 relating to fuel cells
• CPC Class Codes: B60L 3/0061 relating to electrical machines
• CPC Class Codes: B60L 50/16 with provision for separate direct mechanical propulsion
• CPC Class Codes: B60L 58/26 by cooling
• CPC Class Codes: B60L 58/33 by cooling
• CPC Class Codes: F01P 2037/02 starting
• CPC Class Codes: F01P 2060/14 : Condenser
• CPC Class Codes: F01P 2060/18 : Heater
• CPC Class Codes: F01P 9/06 : by use of refrigerating apparatus, e.g. of compressor or absorber type
• CPC Class Codes: F25B 2400/04 : Refrigeration circuit bypassing means
• CPC Class Codes: F25B 25/00 : Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00
• CPC Class Codes: F25B 40/04 : Desuperheaters
• CPC Class Codes: F25B 6/04 : arranged in series
• CPC Class Codes: Y02T 10/64 : Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/70 : Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 : Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 10/72 : Electric energy management in electromobility
• CPC Class Codes: Y02T 90/16 : Information or communication technologies improving the operation of electric vehicles
• CPC Class Codes: Y02T 90/40 : Application of hydrogen technology to transportation, e.g. using fuel cells

Abstract

There are provided a water-refrigerant heat exchanger 30 for exchanging heat between refrigerant discharged from a compressor 21 and engine-cooling water circulating an engine-cooling water circuit 10, prior to being fed into the radiator 22, and a bypass 25 for guiding the refrigerant prior to being fed into the evaporator 24 to the water-coolant heat exchanger 30 while bypassing the evaporator 24 and the compressor 21. When it is desired to accelerate the warming-up of the engine 11, the bypass 25 is closed to operate the compressor 21 to heat the engine-cooling water by high-pressure refrigerant, and when it is desired to complement the capacity of the radiator 12, the bypass 25 is open to guide the liquid-phase refrigerant to the water-refrigerant heat exchanger 30 to effectively cool the refrigerant by using the phase change of the refrigerant.

Claims

1. A heat control system comprising

a heat generator in which heat is generated during operation and a temperature is maintained in a predetermined range,

a vapor compression type refrigerator having a compressor, a radiator, an evaporator and a pressure reducing means to transfer heat from a lower temperature side to a higher temperature side,

a heat exchanger for exchanging heat between refrigerant discharged from the compressor and prior to being fed into the radiator and medium for exchanging heat with the heat generator, and

a bypass connected between the outlet of the radiator and the outlet of the compressor to cause the refrigerant prior to being fed into the evaporator to flow serially through the heat exchanger and the radiator while detouring the evaporator and the compressor, wherein

the heat control system includes means for operating in a heating mode for heating the medium with the high-temperature refrigerant discharged from the compressor, and a heat dissipation mode for cooling the medium with the refrigerant discharged from the compressor and dissipating heat absorbed from the medium via the radiator, and

during the heat dissipation mode, at least a part of the refrigerant flowing out from the radiator is made to pass through the bypass.

2. A heat control system as defined by claim 1, wherein the bypass mainly guides a liquid-phase component of the refrigerant prior to being fed into the evaporator to the heat exchanger.

3. A heat control system as defined by claim 1, wherein the bypass guides the refrigerant discharged from the radiator to the heat exchanger prior to being decompressed by the pressure reducing means.

4. A heat control system as defined by claim 1, wherein the system further comprises means for controlling the heat exchange between the medium and the refrigerant in the heat exchanger.

5. A heat control system as defined by claim 4, wherein the means for controlling the heat exchange operates in the heating mode when the temperature of the heat generator is lower than a first predetermined temperature, operates in the heat dissipation mode when the temperature of the heat generator is a second predetermined temperature above the first predetermined temperature or higher, and operates in a normal mode when the temperature of the heat generator is within a range from the first predetermined temperature to the second predetermined temperature, in which the heat exchange between the medium and the refrigerant is made to stop.

6. A heat control system as defined by claim 1, wherein the heat generator is a heat engine.