# US 7,406,998 B2 · Heat storing device

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- Number: US 7,406,998 B2
- Document ID: US7406998B2
- Status: Granted
- Kind: B2
- Application number: 11/357,477
- Filed: 2006-02-17
- Published: 2006-09-07
- Granted: 2008-08-05
- Earliest claimed: 2005-02-17
- Assignees: Honda Motor Co., Ltd.
- Inventors: Tomohide Kudo
- Web page: https://patentgrep.com/patent/US7406998B2

## CPC

- F28D 20/02: using latent heat
- Y02E 60/14: Thermal energy storage
- Y10S 165/902: Heat storage
- F28D: HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means F24H; furnaces F27; details of heat-exchange apparatus of general)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

A heat storing device for exchanging heat energy between a heat storing material and a fluid. The heat storing device has a heat storing module having heat storing material spaces filled with a heat storing material and fluid passages for a fluid to flow through adjacent to the heat storing material spaces. The heat storing module includes multiple plates in a stack. Each of the multiple plates has fluid passages in one side thereof. In mutually adjacent pairs of plates, the sides having the fluid passages face each other. When each pair of plates is seen face-on, with respect to the fluid passages of one of the plates, the fluid passages of the other plate intersect substantially at right angles, and the fluid passages of the two plates connect at these positions where they intersect.

## Claims

### Claim 1

A heat storing device for exchanging heat energy between a heat storing material and a fluid, comprising a heat storing module having heat storing material spaces filled with the heat storing material and fluid passages for the fluid to flow through adjacent to the heat storing material spaces, wherein:
the heat storing module includes multiple flat plates in a stack;
each of the plates has the fluid passages in a first face thereof and the heat storing material spaces in a second face thereof, the first face and the second face being on opposite sides of the plate;
mutually adjacent pairs of the plates are stacked together so that the first faces thereof having the fluid passages face each other;
the fluid passages of a first plate of the pair, and the fluid passages of a second plate of the pair, intersect substantially at right angles; and
the fluid passages mutually intersecting at right angles communicate with each other at positions where they intersect.

### Claim 2 (depends on 1)

The heat storing device according to claim 1, wherein each of the plates comprises a quadrilateral plate having a multiplicity of the fluid passages formed by substantially straight channels extending between two mutually opposite sides of the four sides of the quadrilateral.

### Claim 3 (depends on 2)

The heat storing device according to claim 2, further comprising one fluid inlet header fronting onto two adjacent sides of the stack of quadrilateral plates and one fluid outlet header fronting onto the other two sides of the stack of quadrilateral plates, wherein:
the fluid inlet header communicates with one end of the multiple fluid passages; and
the fluid outlet header communicates with opposite ends of the fluid passages.

### Claim 4 (depends on 3)

The heat storing device according to claim 3, further comprising a blocking plate, provided between the fluid inlet header and the multiple plates and between the fluid outlet header and the multiple plates, for blocking off the ends of the heat storing material spaces from the ends of the fluid passages.

### Claim 5 (depends on 1)

The heat storing device according to claim 1, wherein the positions where the multiple fluid passages intersect are arrayed with a fixed pitch.

### Claim 6 (depends on 2)

The heat storing device according to claim 2, wherein the second plate is designed to assume a same shape as the first plate, when the second plate is turned upside-down with respect to the first plate and changed in phase through 90° with respect to the first plate.

### Claim 7 (depends on 1)

The heat storing device according to claim 1, wherein the fluid passages comprise spiral-shaped recesses, and in each of the pairs of plates a spiral direction of the fluid passages in the second plate is opposite to a spiral direction of the fluid passages in the first plate.

### Claim 8 (depends on 7)

The heat storing device according to claim 7, wherein the second plate is designed to assume a same shape as the first plate when turned upside-down with respect to the first plate.

### Claim 9 (depends on 7)

The heat storing device according to claim 7, wherein when the plates are seen face-on, the mutually oppositely spiraling fluid passages intersect substantially at right angles.

### Claim 10 (depends on 1)

The heat storing device according to claim 1, wherein the fluid passages are divided from the storing material spaces by generally vertical walls so that the fluid passages and the storing material spaces are not continuous with each other.

### Claim 11 (depends on 10)

The heat storing device according to claim 10, wherein the fluid passages and the storing material spaces are of a generally same height.