Mobile phase-change heat and cold storage device

Patent metadata

Field	Value
Publication number	US-12259192-B2
Application number	US-202017791426-A
Country	US
Kind code	B2
Filing date	Jul 3, 2020
Priority date	Jan 7, 2020
Publication date	Mar 25, 2025
Grant date	Mar 25, 2025

Abstract

A mobile phase-change heat and cold storage device include heat transfer plates, a bracket, a casing, a main tube, a storage tank, and a phase-change working medium. Heat is stored and released by the phase-change working medium, and the main tube and casing provide an interface between the heat and cold storage device and the outside world. In the process of heat storage, vapor flows through the heat transfer plates via the main tube; heat is transferred to the phase-change working medium via the heat transfer plates, and is transported in a box body to a designated position; cold water flows through the heat transfer plates via the casing; heat is transferred from the phase-change working medium to the cold water via the heat transfer plates to obtain hot water; the phase-change working medium can release heat by exothermic solidification. The process of cold storage is similar thereto.

First claim

The invention claimed is:

1. A mobile phase-change heat and cold storage device, comprising a storage tank, a main tube, heat transfer plates, a phase-change working medium, a bracket, a casing, an insulation layer and a box body; wherein the storage tank, the main tube, the heat transfer plate, the phase-change working medium, the bracket, the casing and the insulation layer are arranged inside the box body; the storage tank comprises a tank body and a base; an outer surface of the tank body is coated with the insulation layer; the heat transfer plate, the phase-change working medium and the bracket are arranged inside the tank body; the heat transfer plate is arranged on the bracket; the bracket is welded on a storage tank bottom plate; the main tube and the casing are respectively connected to the heat transfer plates; one side face of the tank body and the insulation layer is provided with a first aperture on an upper left side for the main tube to pass through, and a second aperture on a lower right side for the casing to pass through.

2. The mobile phase-change heat and cold storage device of claim 1 , wherein the bracket is a groove-shaped bracket cut with several holes at a surface; an upper surface of the bracket is fixedly connected to the connecting tube of the heat transfer plates; and two sides are welded on the storage tank bottom plate.

3. The mobile phase-change heat and cold storage device of claim 1 , wherein the phase-change working medium is water, sodium acetate trihydrate, sodium sulfate decahydrate, calcium chloride hexahydrate, hexadecane, pentadecane, polyethylene glycol, fatty acid, or high-density polyethylene.

4. The mobile phase-change heat and cold storage device of claim 1 , wherein a top portion or a front portion of the box body is openable.

5. The mobile phase-change heat and cold storage device of claim 1 , wherein the base is a groove-shaped base; the tank body comprises the bottom plate, a front plate, a rear plate, side plates and a top plate; the second aperture for the casing to pass through is cut at the lower right side of the front plate; and the U-shaped groove for the main tube to pass through is cut at the upper left side; the U-shaped groove has a diameter slightly greater than that of the main tube; the front plate, two side plates and the rear plate are welded on the bottom plate; the casing passes through the second aperture of the front plate and is welded; the top plate is formed by bending and machining multiple plate materials, and is liftable and slidable; the groove-shaped base has a grid and is welded on a lower surface of the bottom plate; and a third aperture is provided in the middle of the grid for a hoisting rope to pass through.

6. The mobile phase-change heat and cold storage device of claim 5 , wherein the heat transfer plate comprises the cover plate, the partition plate, seals, fins, connecting tubes, ribs and a distance plate, wherein the partition plate, fins, cover plate and seals are brazed to form the heat transfer plate core; the channel is milled on the connecting tube; two ends of the heat transfer plate core are respectively inserted into the connecting tube channel; the ribs are transversely welded at equal intervals at two sides of the heat transfer plate core; the connecting tubes comprises an upper connecting tube and a lower connecting tube; the lower connecting tube is a casing structure of an inner tube and an outer tube being coaxial; one end of each the upper connecting tube and the lower connecting tube is sealed, and the other end is open; the sealed end is welded to the distance plate; the open end is connected to the main tube; the main tube has a T-shaped structure in the same width direction; and the distance plate and the rear plate of the storage tank are welded together.

7. The mobile phase-change heat and cold storage device of claim 5 , wherein the heat transfer plate comprises a cover plate, a partition plate, seals, fins, connecting tubes and ribs, wherein the partition plate, fins, the cover plate and the seals are brazed to form a heat transfer plate core; two gaps are provided at diagonally opposite corners of the heat transfer plate core; the seals are arranged at two sides of the heat transfer plate core and at the ends of the gaps; there is no seal at the upper and lower ends; and the fins have a length flush with the partition plate.

8. The mobile phase-change heat and cold storage device of claim 7 , wherein the heat transfer plate is assembled by argon arc welding of the heat transfer plate core, the connecting tubes and ribs, wherein one end of the connecting tube is sealed and the other end is opened; a channel is milled on the connecting tube, two ends of the heat transfer plate core are respectively inserted into the connecting tube channel; the end with the opening of the connecting tube faces the direction of the gap of the heat transfer plate core; the heat transfer plate core and the connecting tubes are welded together; and ribs are longitudinally welded at equal intervals at two sides of the heat transfer plate core and have a length within the range of the height of the gap of the heat transfer plate core.

9. The mobile phase-change heat and cold storage device of claim 8 , wherein the casing comprises an outer tube having a relatively large diameter, an inner tube having a relatively small diameter and a fork-shaped bracket, wherein the outer tube is sealed at one end, and is cut with through holes with equal number of and equal spacing from the heat transfer plates at one side; the through hole has a diameter equal to the outer diameter of the connecting tube; both ends of the inner tube are open, and one end is welded with the fork-shaped bracket; the diagonal length of the fork-shaped bracket is equal to the inner diameter of the outer tube; the end of the inner tube with the fork-shaped bracket is arranged between the first and second through holes at the sealed end of the outer tube, and the other end of the outer tube is seal-welded with a circular plate having an outer diameter equal to the outer diameter of the outer tube and an inner diameter equal to the outer diameter of the inner tube; the inner tube extends out of the circular plate by a certain distance; the lower connecting tube of the heat transfer plates extends into the through hole of the casing and is welded and sealed; and the outer end opening of the inner tube is connected to a second quick connector.

10. The mobile phase-change heat and cold storage device of claim 8 , wherein the main tube is sealed at one end, and is opened at the other end; a part inside the storage tank is sealed at a port, and cut with through holes with equal number of and equal spacing from the heat transfer plates at one side; the through hole has a diameter equal to the outer diameter of the connecting tube, and a length equal to the total length of the casing; an upper connecting tube of the heat transfer plates extends into the through hole of the main tube, and is welded and sealed; and a part outside the storage tank is opened at a port; and the opening is connected to a first quick connector.

Assignees

• Nanjing University Of Technology

Inventors

• Ling Xiang
• Du Mingsheng
• Wang Hang

Classifications

• F28F2275/06

  by welding · CPC title

• F28F2270/00

  Thermal insulation; Thermal decoupling · CPC title

• F28D7/1615

  the conduits being inside a casing and extending at an angle to the longitudinal axis of the casing; the conduits crossing the conduit for the other heat exchange medium · CPC title

• F28D7/1607

  with particular pattern of flow of the heat exchange media, e.g. change of flow direction (F28D7/1623, F28D7/1638, F28D7/1661, F28D7/1676, F28D7/1692 take precedence) · CPC title

• Y02E60/14

  Thermal energy storage · CPC title