JPS63273756A - Control of air conditioning system - Google Patents

Abstract

PURPOSE:To select as desired the state of priority of a control device at hand or control device that is away by making it possible to switch as desired the priority mode at hand or priority mode in the center according to the output from a control device at hand or control device in the center and preventing switching to the priority mode at hand by the control mode in the center and making it possible to operate only by the priority mode in the center. CONSTITUTION:When in an air conditioning system firstly the output of the terminal Q of a flip-flop is at 'H' level, that is the operation is under way in the priority mode in the center, the output of the flip-flop 20 changes to 'L' level by pressing down once the push switch 16 of a control device 3 at hand. This air conditioner is operated by the priority mode at hand. After this, if the push switch 16 of the operation section 6 of a control device in the center is pressed down once, this air conditioner returns again to the priority mode in the center. For example if it is used in a hotel, a building to switch many tenants belong and so on, and the central control device is provided in the center and the control device at hand and air conditioner are provided in a room which is air-conditioned, the operation of this air conditioner can be controlled as desired from the center or from the room which is air-conditioned by switching the operation of the air conditioner to the priority mode in the center or to the priority mode at hand.

Description

[Detailed Description of the Invention] (a) Industrial Application Field The present invention relates to a method for controlling an air conditioning system in which the operation of a single air conditioner can be controlled from a central controller and a local controller. be.

(b) Conventional technology In general, a conventional technology for an air conditioning system in which the operation of an air conditioner can be controlled from a central controller and a local controller is described in U.S. Pat. No. 4,287,939. There was something like that. The device described in this specification had similar switches at both the hand and the center, and by operating these switches, the operation of the air conditioner could be controlled from either the hand or the center. .

(c) Problems to be Solved by the Invention In the conventional air conditioning system configured as described above, the operation of the air conditioner could be controlled from either the local or central location. It was not possible to restrict the operation of the air conditioner based on a control signal from only one of the two.

For example, if such an air conditioning system is used in a hotel guest room, i.e., if the air conditioner and hand control device are installed in the guest room and the central control device is installed in the front desk operation section, the system may be used against the wishes of the front desk. There is a problem in that unnecessary operations are performed arbitrarily from the handheld control device.

In addition, if priority is given to either the local control device or the central control device, control from either the local or remote control device will be masked, allowing air conditioning or There was a problem in that it became impossible to perform forced control from a distance. For example, in hotels, etc., if the user forgot to turn off the air conditioner in a guest room, the user would have to go all the way to the guest room to turn off the air conditioner.

In view of such problems, the present invention provides a method of controlling an air conditioning system in which the priority state of a local control device or a remote control device can be arbitrarily selected.

(d) Means for solving the problems The present invention includes a central control device that outputs control signals for air conditioning;
In a method for controlling an air conditioning system having a local control device that outputs a control signal similar to this control signal, and an air conditioner or the like whose operation is controlled based on a control signal from either the central control device or the local control device. , a central priority mode in which the operation of the air conditioner is controlled based on the control signal from the central control device, and a central priority mode in which the operation of the air conditioner is controlled based on the control signal from the central control device; , and a local priority mode in which the operation of the air conditioner is controlled based on the control signal from the local controller, and a local priority mode in which the output from the local controller is masked and the air conditioner is controlled based on the control signal from the central controller. It is equipped with a central control mode in which the operation of the device is controlled.

(E) Effect In the control method for the air conditioning system configured as described above, it is possible to switch between the local priority mode and the central priority mode at will according to the output from the local control device or the central control device, and also to switch between the local priority mode and the central priority mode. This prevents switching to the local priority mode and allows the air conditioner to be operated only in the central priority mode.

(f) Example Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a schematic diagram of an air conditioning system. In the figure, 1 is a central controller, 2 is an air conditioner, 3 is a local controller, and 4 is an interface unit. It is connected to the. The air conditioners 2 are installed in individual rooms or different locations, and each air conditioner 2 receives control signals from the local control device 3 and control signals from the central control device 1 provided via the interface section 4. is supplied.

FIG. 2 is an electrical circuit diagram of the main parts of the air conditioner 2. As shown in FIG. In this figure, the interface section 4 and signal line 5 are omitted,
A signal from the central control device 1 is directly given to the air conditioner 2. Reference numeral 6 denotes an operation section of the central control section 1, which corresponds to each air conditioner. This operating section 6 has a button switch 7 for selecting center priority mode (this switch 7 closes its contacts only while the key is pressed).
, selector switch 8 that selects the central control mode (this switch 8 switches the contact open/close every time the key is pressed), selector switch 9 that controls the operation/stop of the air conditioner 2 (when the contact is closed, the operating state ), a changeover switch 10 that sets the air conditioner 2 to ventilation mode (ventilation mode is activated when the contact is closed), a variable resistor 11 for temperature setting, and a variable resistor 12 for frequency (capacity) setting (air ) is provided to set the maximum operating frequency of the compressor used in the air conditioner 2. Control signals from these switches and variable resistors are sent to the microcomputer 13 that constitutes the main electrical circuit of the air conditioner 2. The changeover switches 9 and 10 are each controlled by a microcomputer 13.
static input terminal A2. A, and the variable resistors 11 and 12 are connected to the analog input terminals AD2. AD, is connected to.

Further, the hand control device 3 is provided within the conditioned room or the air conditioner 2. This hand control device 14 includes a variable resistor 15 for temperature setting, and a pushbutton for selecting hand priority mode.
It has a switch 16, a changeover switch 17 for controlling operation/stop of the air conditioner 2, and an isochi 19. Control signals from these switches and variable resistors are given to the microcomputer 13. The variable resistor 15 is an analog input to the microcomputer 13, and the microcomputer 13 has output terminals C2, C3 and input terminal B in the setting state. l Bll Bll B3 is used for scan input.

20 is a flip-flop (FF) circuit, and the set input terminal S is connected to the switch 7.
The reset input terminal R is supplied with a signal from the switch 16 of the handheld control device 3, and the output terminal Q is connected to the terminal A3 of the microcomputer 13. Incidentally, the truth value of this flip-flop 20 is as shown in FIG. In this explanatory diagram of truth values, rHJ is a +vcc level voltage applied via resistors 21 and 22, and rLJ is a ground level. Note that when s=H and R=H, the previous state remains unchanged.

The microcomputer 13 detects the output of the terminal Q of the flip-flop 20 at the terminal A3 based on the flowchart, and (1) when the output of the terminal Q of the flip-flop 20 is rHJ, that is, the When the switch 7 is pressed once or when the contacts of the changeover switch 8 are in a closed state, the operation of the air conditioner is controlled based only on the control signal from the central control device 6. Therefore, the temperature set value set by the variable resistor 11 is compared with the room temperature detected by the temperature detector 23, and the operation of devices 24 such as a compressor and a blower is controlled to condition the air in the conditioned room. In addition, operation/stopping, ventilation, etc. are performed at the switched wind speed. Next (11) When the output of the terminal Q of the flip-flop 20 is ILJ, that is, when the push switch 16 of the hand control device 3 is pressed once, the air conditioner is operated based only on the control signal from the hand control device 3. operation is controlled.

Therefore, the temperature set value set by the variable resistor 15 is compared with the room temperature detected by the temperature detector 23, and the operation of devices 24 such as a compressor and a blower is controlled to condition the air in the conditioned room. Incidentally, settings such as operation/stop, ventilation, and wind speed are performed using switches 17, 18, and 19.

The switch 25 is used to switch between a cooling operation mode and a heating operation mode of the air conditioner.

In the air conditioning system configured as described above, first, when the output of the terminal Q of the flip-flop 20 is at the rHJ level, that is, when operating in the state (1) above (in addition, when the operation section of the central controller 1 When the contact point of the changeover switch 8 of 6 is in the open state), that is, the operation is performed in the center priority mode, when the push switch 16 of the handheld control device 3 is pressed once, the output of the flip-flop 20 changes to the third The level changes to rLl based on the truth value shown in the figure. Therefore, this air conditioner is operated in the state (11) above, that is, in the hand priority mode. After this, the central controller 1
When the push switch 16 of the operating section 6 is pressed once, the air conditioner returns to the state of (1) above, that is, the center priority mode.

When the contact of the changeover switch 8 of the operating section 6 of the central control device 1 is closed, the central control mode is entered. That is, by closing the contact of the changeover switch 8, the "L" level voltage is always applied to the terminal S of the flip-flop 20, and the third
From the truth value in the figure, the output of the terminal Q is always at the rHJ level, regardless of the level applied to the terminal R. Therefore, the operating state (1) above is always maintained regardless of the operation of the bushing switch 16 of the handheld control device 3.

When such an air conditioning system having central control mode, central priority mode, and local priority mode is used in a hotel or multi-tenant building, for example, the central control device is installed in the center, and the local control device and air conditioner are If installed in a conditioned room, the operation of this air conditioner can be switched to the center priority mode or the local priority mode and controlled arbitrarily from the center or the conditioned room.

Furthermore, the central control mode can be set using the central control device.

(G) Effects of the Invention The present invention provides a control method for an air conditioning system in which control signals for air conditioning can be output from both a central control device and a local control device. and a central priority mode in which the operation of the air conditioner is controlled based on the control signal from the central control device, and a central priority mode in which the operation of the air conditioner is controlled based on the control signal from the local control device. a local priority mode in which the operation of the air conditioner is controlled based on the control signal from the central control device, and a central control mode in which the output from the local control device is masked and the operation of the air conditioner is controlled based on the control signal from the central control device. The operation of the air conditioner can be controlled arbitrarily from either the central side or the local side, and by setting the central control mode, the control signals from the local control device are masked, effectively controlling the operation of the air conditioner from the central side. The operation of the air conditioner can be controlled only by control signals from the control device.

In other words, the operation of the air conditioner can be equally controlled from the central side and the local side, and by selecting the central control mode, it can be controlled only from the central side, eliminating unnecessary operations from the local side. The operation can be controlled from the center side, and the operation can be performed with a good division ratio.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of an air conditioning system using the present invention, Fig. 2 is an electrical circuit diagram of the main part of the air conditioner shown in Fig. 1, and Fig.
The figure is an explanatory diagram showing the truth value of the flip-flop shown in FIG. 2. 1... Central control device, 2... Air conditioner, 3.
...Hand control device, 6...Operation unit. Outsourcer Sanyo Electric Co., Ltd.

Claims (1)

[Claims] (1) A central control device that outputs control signals for air conditioning;
In a method for controlling an air conditioning system having a local control device that outputs a control signal similar to this control signal, and an air conditioner or the like whose operation is controlled based on a control signal from either the central control device or the local control device. , a central priority mode in which the operation of the air conditioner is controlled based on the control signal from the central control device, and a central priority mode in which the operation of the air conditioner is controlled based on the control signal from the central control device; , and a local priority mode in which the operation of the air conditioner is controlled based on the control signal from the local controller, and a local priority mode in which the output from the local controller is masked and the air conditioner is controlled based on the control signal from the central controller. A method for controlling an air conditioning system, comprising: a central control mode in which the operation of the device is controlled.