System and method for controlling air conditioner

• US 5,271,453 A
• Filed: 06/03/1992
• Issued: 12/21/1993
• Est. Priority Date: 06/06/1991
• Status: Expired due to Term

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Kato, Takashi, Yoshida, Satoru
• Primary Examiner(s): Wayner, William E.
• Application Number:
  US07/893,030
• Time in Patent Office: 566 Days
• Field of Search: 236/51, 62/160, 165/22
• US Class Current: 165/205
• CPC Class Codes: G05B 19/0421 Multiprocessor system
• CPC Class Codes: G05B 2219/23306 Load program from host, remote load, non volatile card to volatile, ram
• CPC Class Codes: G05B 2219/25144 Between microcomputers, processors
• CPC Class Codes: G05B 2219/2638 Airconditioning

Abstract

A system for sending programs for controlling an air conditioner, comprising at least one indoor unit and an outdoor unit connected to the indoor unit, the outdoor unit including a first memory for storing a program for controlling the room condition, a second memory for storing a program for controlling the outdoor unit in cooperation with the room condition control program, and a communication circuit for sending contents of the program in the memory to the indoor unit, the indoor unit including a third memory for storing a receiving execution program for executing the receiving of the room condition control program from the outdoor unit, a communication circuit for receiving the program from the outdoor unit, and a fourth memory for storing the program received. The third memory has stored therein the receiving program at an address at which the execution thereof is started when power is turned on. The control programs may be sent from the central control unit to the outdoor unit connected thereto and also to the indoor unit connected to the outdoor unit to implement control.

Claims

1. A system for sending programs for controlling an air conditioner, comprising:

at least one indoor unit and an outdoor unit connected to said indoor unit, said outdoor unit including a first memory having a room condition control program stored therein, a second memory having stored therein a program for controlling said outdoor unit in cooperation with said room condition control program, and a communication circuit for sending contents of said memory to said indoor unit, and said indoor unit including a third memory 11 for storing a receiving execution program for executing the receiving of said room condition control program from said outdoor unit, a communication circuit for receiving said control program from said outdoor unit, and a fourth memory for storing said control program received.

2. A system according to claim 1, wherein said third memory has said receiving execution program stored at an address at which the execution thereof is started when power is turned on.

3. A system according to claim 1, wherein said receiving execution program stored in said third memory includes at the last step thereof an instruction for executing said receiving program stored in said fourth program.

4. A system according to claim 1, wherein said second memory contains a sending execution program for sending said room condition control program in response to said receiving execution program, the execution of said sending execution program being started when power is turned on, and subsequently, said sending execution program passes control to said outdoor unit control program for controlling said outdoor unit.

5. A system for sending programs for control of an air conditioner comprising at least one outdoor unit and a central control unit, said central control unit including a first memory having stored therein a program for controlling said outdoor unit, a second memory having stored therein a program for controlling said central control unit in cooperation with said control program, and a communication circuit for sending contents of the outdoor control program from said first memory, said outdoor unit including a third memory for storing a receiving execution program for executing the receiving of said outdoor unit control program from said central control unit, a communication circuit for receiving the programs from said central control unit, and a fourth memory for storing said outdoor unit control program received.

6. A system according to claim 5, further comprising at least one indoor unit connected to said outdoor unit, wherein said central control unit includes a fifth memory for storing a control program for controlling said at least one indoor unit, and wherein said indoor unit includes a sixth memory for storing a receiving execution program for executing the receiving of said room condition control program from the central control unit, a communication circuit for receiving the program from said central control unit, and a seventh memory for storing said control program received.

7. A system according to claim 6, wherein said sixth memory has stored therein said receiving executing program at an address at which the execution thereof is started when power is turned on.

8. A system according to claim 6, wherein said receiving execution program stored in said sixth memory has at the last step thereof an instruction for passing control to the received program stored in said seventh memory.

9. A system according to claim 6, wherein said second memory contains a sending execution program for executing sending in response to said receiving execution program, and wherein the execution of said sending execution program is started when power is turned on, and subsequently, said sending execution program passes control to said control program for controlling said central control unit.

10. A system according to claim 9, wherein said third and sixth memories each have means for sending a request signal for a program to said central control unit, and wherein said second memory includes means for deciding whether or not a program request signal from said third or sixth memory has reached the central control unit, and means for sending contents of said first or fifth memory to said fourth and seventh memory to said fourth and seventh memory when said request signal is received.

11. In a system including at least one indoor unit and an outdoor unit connected to said indoor unit, a method for sending a program for controlling an air conditioner comprising the steps of:

storing in said outdoor unit a program for controlling the room condition and a program for controlling said outdoor unit in cooperation with said room condition control program;

storing a receiving execution program for executing the receiving of said room condition control program from said outdoor unit; and

storing the control program received from said outdoor unit.

12. A method according to claim 11, further comprising the step of storing said program for executing said receiving at an address at which the execution thereof is started when power is turned on.

13. A method according to claim 11, further comprising the steps of storing a sending execution program for executing the sending of said room condition control program in response to said receiving execution program, said sending execution program being started when power is turned on, and passing control to said control program for controlling said outdoor unit after said sending was executed by said sending execution program.

14. A method for sending a program for controlling an air conditioner according to claim 11, wherein said system comprises a non-volatile memory for storing therein in advance an operation program for a plurality of control devices, and software means for altering the operation control program.

15. A method for sending a program for controlling an air conditioner according to claim 11, wherein said system includes a ROM having expanded capacity or address space for writing therein in advance an operation control program for said outdoor unit side control unit.

16. In the control system of an air conditioner according to the present invention, including an outdoor unit side control device and an indoor unit side control device, for controlling the operation of the air conditioner according to control information exchanged between the outdoor unit side control device and the indoor unit side control device through a communication line, the improvement comprising outdoor unit memory means for storing an operation control program for use in the indoor control device and outdoor unit software means for sending an operation control program to the indoor control device through a communication line, the outdoor unit memory means and outdoor unit software means both being provided in the above-mentioned outdoor unit side control device, and indoor unit software means for receiving the operation control program sent from the outdoor unit software means and indoor unit memory means for storing the operation control program, the indoor unit software means and the indoor unit memory means for storing the operation control program both being provided in the indoor unit side control device.

17. In the control system of the air conditioner, including a plurality of outdoor unit side control devices and a plurality of indoor unit side control devices and a central control unit for controlling those outdoor unit and indoor unit side control devices, the central control unit comprises non-volatile memory means for storing therein in advance operation control programs for use in the outdoor unit and indoor unit side control devices, and software means for sending the operation control programs through the communication lines to the outdoor unit and indoor unit side control devices.