Clean room system

• US 6,867,682 B2
• Filed: 05/17/1996
• Issued: 03/15/2005
• Est. Priority Date: 05/19/1995
• Status: Expired due to Fees

• Current Assignee: EBM Werke GmbH & Company KB, Meissner + Wurst GmbH + Company Lufttechnische Anlagen Gebaude--Und Verfahrenstechnik
• Original Assignee: EBM Werke GmbH & Company KB, Meissner + Wurst GmbH + Company Lufttechnische Anlagen Gebaude--Und Verfahrenstechnik
• Inventors: Lipp, Helmut, Renz, Manfred, Reinhardt, Wilhelm, Schneeweiss, Hartmut
• Primary Examiner(s): ZIMMERMAN, BRIAN A
• Application Number:
  US08/652,914
• Publication Number:
  US 20030011465A1
• Time in Patent Office: 3,224 Days
• Field of Search: 340/825.06, 340/875.07, 364/472.09, 364/475.1, 454/51, 454/62, 165/205, 165/208, 165/209, 954/73, 236/49.1, 374/102.05
• US Class Current: 340/3.5
• CPC Class Codes: F24F 11/88 Electrical aspects, e.g. circuits
• CPC Class Codes: F24F 8/10 by separation, e.g. by filtering
• CPC Class Codes: G05B 19/0421 Multiprocessor system
• CPC Class Codes: G05B 2219/25257 Microcontroller

Abstract

A clean room system has filter-fan units each having at least one fan motor and being connected to an electric network. At least one central control unit is provided. A connecting bus system for connecting the filter-fan units to one another and to the at least one central control unit is provided.

Claims

1. A clean room comprising:

filter-fan units each having at least one fan motor and being connected to an electric network;

each one of said filter-fan units having a specific address;

at least one central control unit;

a LON network comprising a connecting bus system;

a connecting node for each one of said filter-fan units, wherein each one of said filter-fan units is connected to said bus system by one of said connecting nodes;

said bus system connecting said filter-fan units to one another and to said at least one control unit;

wherein said filter-fan units are directly accessed via sold specific address by said at least one central control unit;

wherein said fan motors are electronically commutated direct current motors;

wherein each of said connecting nodes has a microcontroller and comprises a motor control of the at least one fan motor of the filter-fan unit;

wherein said at least one central control unit prescribes desired or rated data that is transmitted to said filter-fan units, wherein monitoring of the desired or rated data is effected by said microcontrollers, which, when a disruption occurs, transmit an error message to said at least one central control unit;

wherein said LON network is configured such that a communication from said filter-fan units to said at least one control unit is enabled;

wherein noise produced by said filter fan units is reduced by electronic commutation of said electronically commutated direct current motors at a pulse-width modulated frequency of approximately 20 kHz.

2. A clean room system according to claim 1, further comprising a terminal node, wherein said at least one central control unit is connected with said terminal node to said bus system.

3. A clean room system according to claim 1, wherein said bus system comprises a double strand connecting line.

4. A clean room system according to claim 1, wherein said electric network is a transmission medium between said filter-fan units and said at least one central control unit.

5. A clean room system according to claim 1, wherein as a transmission medium between said filter-fan units and said at least one central control unit cables are used that are selected from the group consisting of infrared cable, optical cable, and coaxial cable.

6. A clean room according to claim 1, wherein each one of said fan motors comprises a motor control unit and wherein each one of said fan motors is connected to said connecting nodes with said motor control unit.

7. A clean room system according to claim 6, wherein each one of said motor control units comprises a bridge circuit.

8. A clean room system according to claim 6, wherein each one of said motor control units comprises a first microcontroller.

9. A clean room system according to claim 8, further comprising interfaces, wherein each one of said first microcontrollers is connected with one of said interfaces to said connecting nodes.

10. A clean mom system according to claim 8, wherein each one of said connecting nodes comprises a second microcontroller.

11. A clean room system according to claim 10, wherein said second microcontroller is a neuron chip.

12. A clean room system according to claim 10, further comprising interface components, wherein each one of said second microcontrollers is connected to said bus system with one of said interface components.

13. A clean room system according to claim 12, wherein each one of said second microcontrollers is connected with said interface components to one of said microcontrollers.

14. A clean room system according to claim 1, further comprising rectifiers, wherein each one of said fan motors is connected with one of said rectifiers to said electric network.

15. A clean room system according to claim 14, wherein each one of said rectifiers has a voltage regulator.

16. A clean room system according to claim 2, wherein said at least one central control unit is a hand-held terminal.

17. A clean room system according to claim 16, further comprising a multiplexer, wherein said at least one central control unit is connected with said multiplexer to said terminal node.

18. A clean room system according to claim 17, wherein said terminal node comprises a microcontroller and an interface component, wherein said microcontroller is connected with said interface component to said bus system.

19. A clean room system according to claim 1, wherein said at least one central control unit is a personal computer.

20. A clean room comprising:

filter-fan units each having at least one fan motor and being connected to an electric network;

each one of said filter-fan units having a specific address;

at least one central control unit;

a LON network comprising a connecting bus system;

a connecting node for each one of said filter-fan units, wherein each one of said filter-fan units is connected to said bus system by one of said connecting nodes;

said bus system connecting said filter-fan units to one another and to said at least one control unit;

wherein said filter-fan units are directly accessed via said specific address by said at least one central control unit;

wherein said fan motors are electronically commutated direct current motors;

wherein each of said connecting nodes has a microcontroller and comprises a motor control of the at least one fan motor of the filter-fan unit;

wherein said at least one central control unit prescribes desired or rated data that is transmitted to said filter-fan units, wherein monitoring of the desired or rated data is effected by said microcontrollers, which, when a disruption occurs, transmit an error message to said at least one central control unit;

wherein said LON network is configured such that the connecting nodes of said filter-fan units are configured to operate as a requester and a responder, respectively;

wherein noise produced by said filter fan units is reduced by electronic commutation of said electronically commutated direct current motors at a pulse-width modulated frequency of approximately 20 kHz.