Cool air/warm air generation system
AssigneeNGK Insulators, Ltd.
InventorsYukio Miyairi, Shinichi Miwa
Life of this patent
Estimating the term…
Abstract
An acoustic wave generation unit oscillates working fluid of 35 atm or less so as to generate acoustic waves with a frequency in a range from 50 Hz or more and 500 Hz or less. A heat/acoustic wave conversion component has a partition wall of 5.0 W/mK or less between two end faces which defines a plurality of cells of 620 cells/cm2 or more and 3100 cells/cm2 or less. A heat exchanger disposed close to one end face receives heat from a first external air flowing into the heat exchanger and gives the heat to the one end face so as to flow out a cold air. Another heat exchanger disposed close to the other end face receives heat from the other end face and gives the heat to a second external air flowing into the another heat exchanger so as to flow out a warm air.
Claims7
A cool air/warm air generation system to cool and heat a cabin of an electric vehicle, comprising:
- an acoustic wave generation unit that includes a linear motor which receives AC power and generates a vibration force in a linear direction, the acoustic wave generation unit oscillating working fluid, that has a pressure of 35 atm or less and oscillates to transmit acoustic waves, with the linear motor so as to generate acoustic waves with a frequency in a range from 50 Hz or more and 500 Hz or less and in accordance with the frequency of the AC power;
- a transmission tube that is filled with the working fluid, and transmits acoustic waves generated at the acoustic wave generation unit with oscillations of the working fluid;
- and
- a cool air/warm air generation unit that obtains first external air and second external air from an outside of the electric vehicle and gives heat of the first external air to the second external air via acoustic waves transmitted through the transmission tube so as to change the first external air into cool air with a decreased temperature and change the second external air into warm air with an increased temperature, wherein
- the cool air/warm air generation unit includes:
- a heat/acoustic wave conversion component that has a partition wall which defines a plurality of cells extending between two end faces of the heat/acoustic wave conversion component and having inside thereof being filled with the working fluid, the heat/acoustic wave conversion component mutually converting heat exchanged between the partition wall and the working fluid and energy of acoustic waves resulting from oscillations of the working fluid;
- a heat exchanger for cool air that is disposed close to one of the two end faces of the heat/acoustic wave conversion component and that receives heat from the first external air flowing into the heat exchanger for cool air and gives the heat to the one end face of the heat/acoustic wave conversion component so as to flow out the cold air;
- and
- a heat exchanger for warm air that is disposed close to the other end face of the heat/acoustic wave conversion component and that receives heat from the other end face and gives the heat to the second external air flowing into the heat exchanger for warm air so as to flow out the warm air,
- wherein the heat/acoustic wave conversion component has a cell density of 620 cells/cm2 or more and 3100 cells/cm2 or less of a cell-structured region occupied by a cross section of the partition wall and a cross section of the cells in a cross section perpendicular to the extending direction of the cells, and
- a material of the partition wall has heat conductivity of 5.0 W/mK or less.
Dependencies are inferred from the claim text.