Base oil for cooling of device, device-cooling oil containing the base oil, device to be cooled by the cooling oil, and device cooling method using the cooling oil

A base oil and machine technology, applied in the base material, petroleum industry, lubricating composition, etc., can solve the problems of enlarged cooling device, inability to directly cool the motor coil, difficulty in ensuring large cooling capacity, etc., and achieve electrical insulation and Excellent thermal conductivity effect

Inactive Publication Date: 2012-09-26
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the air cooling method is excellent in that no special preparation of cooling medium is required, but it is difficult to secure a large cooling capacity
The water-cooling method has excellent cooling performance due to the high thermal conductivity of water, but it is conductive, so it cannot directly cool the motor coil, and it needs to be covered with cooling pipes, so there is a problem that the cooling device becomes larger

Method used

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  • Base oil for cooling of device, device-cooling oil containing the base oil, device to be cooled by the cooling oil, and device cooling method using the cooling oil
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  • Base oil for cooling of device, device-cooling oil containing the base oil, device to be cooled by the cooling oil, and device cooling method using the cooling oil

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Experimental program
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Effect test

no. 1 Embodiment approach

[0034] The basic component of the base oil for machine cooling (hereinafter simply referred to as "base oil") according to the first embodiment of the present invention is at least one of oleyl ester (oleic acid ester, oleyl alcohol ester) and oleyl ether.

[0035]In addition, the total number of terminal methyl groups, methylene groups, and ether groups in the main chain of the oleyl ester and the oleyl ether is 23 or more, and the total number of methyl branches and ethyl branches in the molecule is 1 the following. Here, the main chain refers to the longest chain-like structural part of the molecule.

[0036] Hereinafter, the first embodiment of the present invention will be described in detail.

[0037] In order to improve the thermal conductivity from liquid molecules, it is important to optimize the transfer of thermal vibration energy due to intermolecular conflicts, and to design the molecules so that the vibration energy does not diffuse in the molecules. Also, to i...

Embodiment 1

[0067] 127 g of oleic acid (a reagent produced by Tokyo Chemical Industry Co., Ltd.), 145 g of oleyl alcohol (a reagent produced by Tokyo Chemical Industry Co., Ltd.), and 100 mL of mixed xylene (a reagent produced by Tokyo Chemical Industry Co., Ltd.) were added to a 500 mL four-necked flask with a Dean-Stark device Reagent) and 0.1 g of titanium tetraisopropoxide (reagent manufactured by Tokyo Chemical Industry Co., Ltd.) were reacted at 140° C. for 2 hours while stirring in a nitrogen stream while distilling off water. Then, washing with saturated saline and washing with a 0.1-prescribed sodium hydroxide aqueous solution was performed three times each, and dried over anhydrous magnesium sulfate (a reagent manufactured by Tokyo Chemical Industry Co., Ltd.). After filtering magnesium sulfate, excess raw material alcohol was distilled off, and 215 g of oleic acid oleyl esters were obtained. Various physical properties (thermal conductivity, volume resistivity, kinematic viscos...

Embodiment 2

[0069] Except having used 101 g of n-dodecyl alcohols (Tokyo Chemical Industry Co., Ltd. reagent) instead of 145 g of oleyl alcohols, it carried out similarly to Example 1, and obtained 184 g of n-dodecyl oleates. Various physical properties (thermal conductivity, volume resistivity, kinematic viscosity, viscosity index, density) were measured for this compound.

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Abstract

Disclosed is a base oil for cooling a device, which contains 30 mass% or more of at least one compound selected from an oleyl ester (an oleic acid ester and an oleyl alcohol ester) and an oleyl ether, wherein each of the oleyl ester and the oleyl ether has a terminal methyl group, a methylene group and an ether group in the total number of 23 or more in the main chain thereof, the total number of methyl branches and ethyl branches in the oleyl ester and the oleyl ether is 1 or less, and the kinematic viscosity of the base oil is 4 to 30 mm2 / s or less at 40 DEG C. A device-cooling oil containing the base oil has excellent electrical insulation properties and excellent heat conductivity and is therefore suitable for cooling a motor, a battery, an inverter, an engine, an electric cell or the like in an electric-powered car or a hybrid car.

Description

technical field [0001] The present invention relates to a base oil for machine cooling, a machine cooling oil mixed with the base oil, a machine cooled by the cooling oil, and a machine cooling method using the cooling oil. Background technique [0002] As the performance of electric vehicles and hybrid vehicles increases, the power density of motors increases, and the amount of heat generated also increases. Therefore, not only improvement in heat resistance of coils and magnets, but also various considerations are required in motor design, such as reduction in heat generation due to higher motor efficiency. [0003] There are generally three types of motor cooling methods: air cooling, water cooling, and oil cooling. Among them, the air cooling method is excellent in that no special preparation of a cooling medium is required, but it is difficult to secure a large cooling capacity. The water-cooling method has excellent cooling performance due to the high thermal conduct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M105/36C10M105/18C10N20/00C10N20/02C10N30/00C10N40/14
CPCC10N2240/201C10M105/34C10M2207/0406C10M105/18C10M2207/2815C10N2240/10C10M2207/2835C10M105/36C10N2240/04C10M2207/2825C10N2220/032C10N2220/028C10M105/38C10M2207/2895C10N2220/022C10M105/40C10M2207/2855C10N2020/02C10N2040/04C10N2040/16C10N2040/25C10N2020/017C10N2020/071C10N2030/00
Inventor 坪内俊之
Owner IDEMITSU KOSAN CO LTD
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