Unlock instant, AI-driven research and patent intelligence for your innovation.

Heating and cooling system

a technology of cooling system and gear box, which is applied in the direction of transportation and packaging, electric propulsion mounting, lighting and heating apparatus, etc., can solve the problems of great mechanical loss of gear box gears

Inactive Publication Date: 2011-05-19
TOYOTA IND CORP
View PDF0 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a heating and cooling system that adjusts the temperature of two targets using the change in refrigerant in a refrigerant circulation circuit. The system includes a refrigerant circulation circuit with a compressor, condenser, and expansion valve, two targets, a first refrigerant circuit, and a second refrigerant circuit. The first refrigerant circuit heats the first target and cools the second target, while the second refrigerant circuit cools only the second target. The system also includes a first switching section that selectively permits or prevents the refrigerant from flowing to the first target, controlled by a control section. The technical effect of the invention is to provide a flexible and efficient heating and cooling system that can adjust the temperature of two targets simultaneously or independently.

Problems solved by technology

In the case of the gear box, when the temperature of the gear box is low and the viscosity of the oil is high such as at starting of the engine in winter, the mechanical loss of the gears in the gear box is great.
However, the cooling system for vehicle electric motor of the above publication only cools the oil.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Heating and cooling system
  • Heating and cooling system
  • Heating and cooling system

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0011]the present invention will now be described with reference to FIG. 1.

[0012]A heating and cooling system S1 of the first embodiment includes a refrigerant circulation circuit 10. The refrigerant circulation circuit 10 includes a compressor 11, a condenser 12, and an expansion valve 13. Furthermore, the heating and cooling system S1 includes a first target and a second target in the refrigerant circulation circuit 10. The first target is a gear box 30 in the first embodiment and requires temperature adjustment by heating and cooling. The second target is a motor section 14 (heat exchanger) in the first embodiment and requires temperature adjustment by cooling. The heating and cooling system S1 of the first embodiment is mounted on a vehicle, which is a hybrid car in the first embodiment. The hybrid car includes an engine (not shown) and the motor section 14 both serving as a driving force for travelling.

[0013]The motor section 14 will now be described. The motor section 14 inclu...

third embodiment

[0074]Thus, the heating and cooling system S3 of the third embodiment permits the refrigerant to flow through one of the first to sixth refrigerant circuits by switching the first to fourth switching sections by the control device 52.

[0075]The third embodiment has the following advantages in addition to the advantages of the first embodiment.

[0076](12) The bypass path 55 connects the section in the connection passage 53 downstream of the expansion valve 13 and upstream of the motor section 14 to the section in the suction passage 43 downstream of the motor section 14 and upstream of the suction-side switching valve 47. Furthermore, the heating and cooling system S3 includes the passage switching valve 54, which is switched to permit the refrigerant that has passed through the expansion valve 13 to flow to the bypass path55 or to prevent the refrigerant from flowing to the bypass path 55. When it is not necessary to cool the motor section 14, the passage switching valve 54 is switche...

second embodiment

[0080]In the second embodiment, the oil return passage 21d may be omitted.

[0081]In the first or third embodiment, the outlet port 21b may be located in the motor housing 21 close to the partition wall 22, and the oil return passage 21d, which connects the inlet port 21a to the outlet port 21b, may be formed in the motor housing 21.

[0082]In the first and second embodiments, the expansion valve 13 may not be formed integrally with the motor housing 21, and may be located in the passage 42 between the inlet port 21a and the condenser 12.

[0083]In each of the embodiments, the radiator fins 28a of the stator 28 may be omitted.

[0084]In each of the embodiments, the temperature in the gear box 30 may be directly detected by a temperature sensor located in the gear box 30, or may be detected by the temperature sensor located in the gear box 30 based on the temperature of the lubricant.

[0085]During the first and second heating modes, if the effect of the gear box 30 is insufficient as the cond...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A heating and cooling system, which includes a refrigerant circulation circuit, first and second targets, first and second refrigerant circuits, a first switching section, and a control device, is disclosed. The first switching section is selectively switched between a first position at which a refrigerant discharged from a discharge area of a compressor is permitted to flow to the first target and a second position at which the refrigerant is not permitted to flow to the first target. The control device switches the first switching section to the first position so that the refrigerant circulation circuit functions as a first refrigerant circuit, thereby heating the first target and cooling the second target. The control device switches the first switching section to the second position so that the refrigerant circulation circuit functions as a second refrigerant circuit, thereby cooling only the second target.

Description

BACKGROUND OF THE INVENTION[0001]The present invention relates to a heating and cooling system that is arranged in a refrigerant circulation circuit and includes a first target and a second target that require temperature adjustment.[0002]A typical refrigerant circulation circuit of a vehicle air conditioning system includes a compressor, a condenser, and an expansion valve. The temperature of a refrigerant changes while the refrigerant circulates in the refrigerant circulation circuit. Japanese Laid-Open Patent Publication No. 2004-357458 discloses a technique for cooling (temperature adjustment), for example, oil using the temperature change of the refrigerant. A cooling system for vehicle electric motor disclosed in the above publication includes a vehicle electric motor and an oil circulation path. The vehicle electric motor includes a motor section having a rotor and a stator, and a motor case accommodating the motor section. The oil circulation path circulates the oil that coo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(United States)
IPC IPC(8): F25B13/00F25B1/00
CPCB60K1/00B60K6/20B60K11/02B60K2001/001B60K2001/003B60H1/3222H02K9/20H02K15/125H02K2213/09F25B31/006H02K7/116
Inventor ADANIYA, TAKUFUKASAKU, HIROSHIYOKOMACHI, NAOYASUZUKI, JUNYA
Owner TOYOTA IND CORP