Elevator linear propulsion system with cooling device

• US 10,640,332 B2
• Filed: 08/05/2016
• Issued: 05/05/2020
• Est. Priority Date: 08/07/2015
• Status: Active Grant

• Current Assignee: Otis Elevator Company (Otis Worldwide Corp.)
• Original Assignee: Otis Elevator Company (Otis Worldwide Corp.)
• Inventors: Ranjan, Ram, Manes, Enrico
• Primary Examiner(s): Riegelman, Michael A
• Application Number:
  US15/748,816
• Publication Number:
  US 20180229971A1
• Time in Patent Office: 1,369 Days
• CPC Class Codes: B66B 11/00 Main component parts of lifts in, or associated with, buildings or other structures
• CPC Class Codes: B66B 11/0407 actuated by an electrical linear motor in the counterweight B66B17/12
• CPC Class Codes: B66B 7/02 Guideways; Guides arrangements in mine shafts E21D7/02
• CPC Class Codes: B66B 9/003 for lateral transfer of car or frame, e.g. between vertical hoistways or to/from a parking position
• CPC Class Codes: F28D 15/02 in which the medium condenses and evaporates, e.g. heat pipes heat pipes used in solar heat collectors F24S10/95; in radiators F28D1/0226; in nuclear reactors G21C15/257
• CPC Class Codes: H02K 41/031 of the permanent magnet type
• CPC Class Codes: H02K 9/225 Heat pipes

Abstract

An elevator system includes an elevator car constructed and arranged to travel in a hoistway. A linear propulsion system of the elevator system is configured to impart a force upon the elevator car to control movement of the car. The linear propulsion system includes a secondary portion mounted to the elevator car and may have a plurality of magnets. A first primary portion (42) of the linear propulsion system includes a mounting assembly (60), a plurality of coils engaged to the mounting assembly (60), and a first cooling device (80) including at least one conduit (82) projecting outward from the mounting assembly (60) and into the hoistway for transferring heat.

Claims

1. An elevator system, comprising:

an elevator car constructed and arranged to travel in a hoistway; and

a linear propulsion system configured to impart force to the elevator car, the linear propulsion system including a first primary portion including a mounting assembly, a plurality of coils engaged to the mounting assembly, and a first cooling device including at least one conduit projecting outward from the mounting assembly and into the hoistway for transferring heat.

2. The elevator system set forth in claim 1, wherein the linear propulsion system includes a secondary portion mounted to the elevator car and including a plurality of magnets.

3. The elevator system set forth in claim 1, wherein the at least one conduit is a plurality of heat pipes.

4. The elevator system set forth in claim 3, wherein the at least one conduit is at least in-part embedded in the mounting assembly.

5. The elevator system set forth in claim 4, wherein the mounting assembly includes an electrically non-conductive panel engaged to the plurality of coils, and the at least one conduit is a plurality of conduits each being partially embedded in the panel for conductively transferring heat from the panel and through the at least one conduit.

6. The elevator systems set forth in claim 1, wherein the at least one conduit is a plurality of solid conduits and made of a material having a coefficient of thermal conductivity that is about greater than 100 watts per meter kelvin.

7. The elevator system set forth in claim 6, wherein the mounting assembly includes an electrically non-conductive panel engaged to the plurality of coils, and the at least one conduit is a plurality of conduits each being partially embedded in the panel for conductively transferring heat from the panel and through the at least one conduit.

8. The elevator system set forth in claim 6 further comprising:

a second primary portion including a second cooling device including a plurality of heat pipes.

9. The elevator system set forth in claim 6 further comprising:

a second primary portion including a second cooling device including at least one hollow conduit loop for flowing a cooling fluid.

10. The elevator system set forth in claim 1 further comprising:

a rail disposed in and extending along the hoistway, and wherein the mounting assembly is engaged to the rail and the first cooling device includes a plurality of cooling fins projecting outward from the rail into the hoistway with the at least one conduit extending through each one of the plurality of cooling fins.

11. The elevator system set forth in claim 10, wherein each one of the plurality of cooling fins substantially extend vertically within the hoistway.

12. The elevator system set forth in claim 10,

wherein the mounting assembly includes an electrically non-conductive panel engaged to the plurality of coils and a bracket engaged between the non-conductive panel and the rail, with the plurality of cooling fins projecting outward from the rail for conductively transferring heat from the at least one conduit and into the plurality of cooling fins and convectively from the cooling fins and into the hoistway.

13. The elevator system set forth in claim 12, wherein the at least one conduit projects outward from the bracket.

14. The elevator system set forth in claim 13, wherein the linear propulsion system includes a secondary portion mounted to the elevator car, wherein the secondary portion includes a first plurality of magnets and a second plurality of magnets with the primary portion positioned between the first and second plurality of magnets.

15. The elevator system set forth in claim 1 further comprising:

a rail disposed in and extending along the hoistway, and wherein the mounting assembly includes an electrically non-conductive panel engaged to the plurality of coils and a bracket engaged between the non-conductive panel and the rail, with the at least one conduit projecting outward from the bracket for conductively transferring heat from the bracket and through the at least one conduit.

16. An elevator linear propulsion system comprising:

a substantially vertical rail; and

a first primary portion including a first plurality of electrical coils, a first mounting assembly engaged between the first plurality of electrical coils and the rail, and a first cooling device including a plurality of solid conduits constructed and arranged to conduct heat out of the first mounting assembly.

17. The elevator linear propulsion system set forth in claim 16 further comprising:

a second primary portion including a second plurality of electrical coils, a second mounting assembly engaged between the second plurality of electrical coils and the rail, and a second cooling device including a plurality of hollow conduits constructed and arranged to flow a cooling fluid for transferring heat out of the second mounting assembly.

18. The elevator linear propulsion system set forth in claim 17, wherein the first and second primary portions are modular portions distributed along the rail.

19. The elevator linear propulsion system set forth in claim 18, wherein the first primary portion includes a duty cycle of about less than thirty percent and the second primary portion includes a duty cycle of about greater than thirty percent.