Refrigeration – Automatic control – Diverse – cascade or compound refrigeration-producing system
Patent
1993-07-30
1995-02-21
Tanner, Harry B.
Refrigeration
Automatic control
Diverse, cascade or compound refrigeration-producing system
62298, 62230, F24F 1102
Patent
active
053905067
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to an electric power supply apparatus for an air conditioning control machine which has a controller and an air conditioning control unit.
BACKGROUND ART
Generally, as disclosed in Japanese Patent Application Laying Open Gazette No. 2-85634, an air conditioner has been disclosed, in which a single remote controller is connected to a plurality of indoor control units for respectively controlling a plurality of indoor units so that control signals such as operation signals are sent and received between the remote controller and each of the indoor control units to control an air conditioning operation.
Between each indoor control unit and the remote controller, electric power is supplied from a previously designated indoor control unit to the remote controller. In addition, an address of each indoor control unit is set and data including error signals, wind direction signals and the like may be transmitted therebetween.
In the above mentioned air conditioning control machine, the address of the indoor control unit that supplies electric power to the remote controller is conventionally set to 0 by the remote controller. However, power cannot be supplied to the remote controller by the power supply unless the power supply's address is set to each indoor control unit. This creates a communication problem wherein communication is not performed between the remote controller and the indoor control unit such that the address is not automatically set.
One solution is for the address of the control unit that powers the remote controller to be previously set in hardware. This, however, requires that a printed circuit board be manufactured individually so that the indoor control units cannot be standardized.
In view of the above mentioned problems, it is an object of the present invention to supply electric power to the controller in a stable manner, by standardizing the air conditioning control units.
DISCLOSURE OF INVENTION
To attain the foregoing object, in the present invention, an air conditioning control unit for supplying electric power is determined using a specific number previously set with respect to each air conditioning control unit.
Specifically, as shown in FIG. 1, an electric power supply apparatus of an air conditioning control unit 2, according to a first embodiment of the invention, includes a plurality of air conditioning control units 2 connected to a single controller 3 via wirings 52 through which control signals between the remote controller 3 and the air conditioning indoor control units 2 are sent and received to control air conditioning operation.
Provided at each air conditioning control unit 2 are number memory means 24, for previously memorizing different specific numbers corresponding to the respective air conditioning control units 2; power supply means 51 for supplying electric power; power supply judging means (or power-on means) 21a, for detecting whether another air conditioning control unit 2 is powering the controller 3, which is done by monitoring the wirings 52; power control means (or no-power-supply means) 21b for determining to not supply electric power to the controller 3, which is when the power supply judging means (or power-on means) 21a detects that the controller 3 is being powered; timing means 21c, for setting a power supply time based on a specific number; and power supply determining means (or power activation means) 21d for determining to supply electric power to the controller 3, which is when the power supply judging means (or power-on means) 21a detects that the controller 3 is not being powered at the time established by the timing means 21c and for enabling the power supply means 51 to supply electric power to the controller 3.
As in the first embodiment, a second embodiment of the present invention discloses an electric power supply apparatus for an air conditioning control machine. As shown in FIG. 2, each air conditioning control unit 2 includes number memory means 24 for previously storing a specific number assig
REFERENCES:
patent: 4811897 (1989-03-01), Kobayashi et al.
patent: 5005366 (1991-04-01), Murashige
patent: 5065813 (1991-11-01), Berkeley et al.
Shima Kiyoshi
Sogabe Masaharu
Sumida Hisashi
Yoshisaka Keiichi
Daikin Industries Ltd.
Tanner Harry B.
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