Apparatus having agitator for agitating fluid
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first embodiment
[0021]A heat transfer circuit 1 according to a first embodiment of the present invention is described below with reference to FIG. 1. A heat transfer fluid circulates in the heat transfer circuit 1 and transfers heat generated by a heat source such as an engine or a transmission apparatus of a vehicle to outside, thereby cooling the heat source. The heat transfer fluid includes a solvent and small particles having heat conductivity greater than that of the solvent. The particles are dispersed in the solvent so that the heat transfer fluid can have a high heat conductivity. Therefore, the heat transfer fluid can efficiently transfer the heat.
[0022]The solvent can carry the particles dispersed in the solvent. For example, the solvent can be water or organic material such as ethylene glycol or toluene. The solvent can be a single-component substance or a mixture of components.
[0023]Each particle dispersed in the solvent is very small, for example, on the order of micrometers or nanomet...
second embodiment
[0041]An apparatus having an agitator 8 according to a second embodiment of the present invention is described below with reference to FIG. 4. According to the second embodiment, the agitator 8 is provided in a radiator 4A.
[0042]The agitator 8 is located in a lower position of a container of the apparatus in the vertical direction. As shown in FIG. 4, the agitator 8 includes a chamber 81 defined by a chamber member 41A and an inlet passage 82 defined by an inlet pipe 42A that is connected to an inlet 82a to the chamber 81. It is noted that the chamber member 41A is a lower tank of the radiator 4A. That is, the lower tank of the radiator 4A and the agitator 8 are a single piece. The chamber member 41A has a cylindrical inner surface defining the inlet 82a. The inlet passage 82 extends in a direction of the tangent to the cylindrical inner surface of the chamber member 41A. When the heat transfer fluid enters the chamber 81 through the inlet passage 82 of the inlet pipe 42A, the heat ...
third embodiment
[0044]An apparatus having an agitator 9 according to a third embodiment of the present invention is described below with reference to FIG. 5. According to the third embodiment, the agitator 9 is provided in at least one of a radiator 4B and a reserver tank 5B.
[0045]The agitator 9 is configured as an ultrasonic vibrator and ultrasonically vibrates the heat transfer fluid collected in chambers 41a, 51a in a lower position of containers (i.e., the lower tank 41, the bottom container 51) of the radiator 4B and the reserver tank 5B. The agitator 9 includes an ultrasonic transducer and a vibrating member joined to the ultrasonic transducer. The ultrasonic transducer is an electronic device for converting electric power supplied from a power source such as a battery into mechanical ultrasonic vibrations. The mechanical ultrasonic vibrations are transmitted to the vibrating member so that a tip of the vibrating member can ultrasonically vibrate in its length direction. The ultrasonic vibrat...
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