JPH0735396A - Air condition control device - Google Patents

Abstract

PURPOSE:To ensure drive control of all devices to be controlled and simplify a construction by changing over a changeover switch in response to consumed current capacity of the air conditioning equipment devices. CONSTITUTION:There are provided a relay contact output portion 14 which are switched on only when a pulse is inputted, and a changeover switch 12 for inputting a pulse into any of the relay contact output portion 13 or the triac output portion 14. By changing over the changeover switch 12, a construction is completed only by connecting air conditioning equipment devices A, B to the relay contact output portion 13 provided consumed current capacities of the air conditioning equipment devices A, B which are desired in drive control fall within an allowable current capacity of the relay contact output portion 13. Provided the consumed current capacities of the air conditioning equipment devices A, B exceed that of the relay contact output portion 13, a relay matching to the consumed current capacities of the air conditioning equipment devices A, B is independently provided on the triac output portion 14 for satisfactory convenience.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioning control device.

[0002]

2. Description of the Related Art Data is exchanged with a central supervisory control device via a signal line, and air conditioner equipment is driven to open and close an air conditioning valve or the like based on an instruction from the central supervisory control device. There is an air conditioning controller to control. As the drive control output method provided in the air conditioning control device as described above,
Conventionally, two methods, a relay contact output method and a triac output method, have been adopted. Generally, the relay contact output method is used in Japan, and the triac output method is used in the United States.

By the way, comparing an air conditioning control device adopting the relay contact output method with an air conditioning control device adopting the triac output method has the following advantages and disadvantages. That is, in the air conditioning control device that adopts the relay contact output method, it is only necessary to connect the controlled device (fan, valve, compressor, etc.) to the relay contact output terminal via the drive power supply, and other devices. However, there is an advantage that the construction work is easy if the installation space of the air conditioning control device itself can be secured, but there is a limit to the current capacity of the relay contact, and the controlled equipment with high current consumption capacity There is a drawback that drive control is impossible.

Further, in the air-conditioning control device adopting the triac output method, a relay having a contact capacity corresponding to the capacity of the controlled device is separately selected and procured, and an exciting coil, a triac, and a power source for exciting the relay are selected. And are connected in series, and the controlled device is connected to the relay contact output of the relay via the drive power source, so that the current capacity of the relay contact can always be made to match the capacity of the controlled device. Although there is an advantage to say, in addition to the installation space of the air conditioning control device itself, a space for installing the relay must be secured in addition to the installation space of the air conditioning control device itself, and the space for this relay cannot be secured. It has the drawback of being difficult.

[0005]

That is, it is possible to easily control the drive of all controlled devices from low current capacity to high current capacity and to secure the installation space of the air conditioning control device itself. There is a problem that there is no air conditioning control device that is easy and convenient to use.

The present invention has been made in order to solve the above problems, and an object of the present invention is to enable drive control of all controlled devices from low current capacity to high current capacity. Another object of the present invention is to provide an easy-to-use air conditioning control device that can be easily installed as long as the installation space for the air conditioning control device itself can be secured.

[0007]

In order to solve the above problems, the present invention transmits and receives data to and from a host controller via a signal line, and outputs a pulse based on an instruction from the host controller. In the air-conditioning control device that outputs a pulse from the control unit and drives and controls the air conditioning equipment only when the pulse is output, the relay contact output unit that turns on only when the pulse is input, and the pulse input It is characterized in that a triac output section that is turned on only when it is turned on and a changeover switch that inputs the pulse to either the relay contact output section or the triac output section are provided.

[0008]

With the above configuration, the relay contact output section and the triac output section are selectively selected by switching the changeover switch according to the current consumption capacity of the air conditioning equipment for which drive control is desired. You can use them properly.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an air conditioning control device according to the present invention will be described below in detail with reference to FIG. 1 is a circuit configuration diagram for explaining the air conditioning control device.

In FIG. 1, reference numeral 1 is an air conditioning controller.
The air conditioning control device 1 is connected via a signal line L to a central monitoring control device (not shown) corresponding to a host control device, and constantly sends and receives monitoring control data to and from the central monitoring control device via the signal line L. Then, based on an instruction from the central supervisory control device, the controlled devices (fan, valve, compressor, etc.) A and B corresponding to the air conditioning equipment are drive-controlled.

The air conditioning control device 1 described above is provided with a communication unit 10, a control unit 11, a changeover switch 12, a relay contact output unit 13, and a triac output unit 14 inside the casing, and
Drive control terminals T _1, T _2, T _3, T ₄ are provided on the surface of the housing. The communication unit 10 is a unit that sends and receives monitoring control data to and from the central monitoring control device via the signal line L, and outputs a control instruction from the central processing unit to the control unit 11. The control unit 11 includes a central processing unit (CPU) and an input / output port (I
/ O), receives instruction data from the communication unit 10 from the input port, and outputs a pulse voltage from the output port to the common terminal 12c of the changeover switch 12 when driving the controlled device A or the controlled device B. It is the part to do.

The change-over switch 12 is a switch for selectively selecting whether to connect the output port of the control unit 11 to the relay contact output unit 13 or the triac output unit 14, and is connected to the connection terminal 12a. Connection terminal 12b
And a common connection terminal 12c.

The relay contact output unit 13 outputs the output of the control unit 11.
Drive control end while receiving the pulse voltage from the power port
Child T_1,T₂The output port of the control unit 11
If the pulse voltage from the_1,T₂
This is the part that turns off (opens) the space. Relay contact output section 1
3 is a smoothing circuit 13a and a contactless switching circuit 13b
And a relay 13c and a diode 13d. flat
The smoothing circuit 13a has a resistance R _1,R₂And condenser C₁And from
And the contactless switching circuit 13b has a resistor R₃When
It is composed of a transistor Tr. The dio
The terminal 13d is a back electromotive force generated by the exciting coil of the relay 13c.
It is for absorbing voltage.

The triac output section 14 is a section for keeping the drive control terminals T _{3 and} T ₄ on (conducting state) while receiving the pulse voltage from the output port of the control section 11.
It is composed of one TRIAC TR.

The internal connection of the above-mentioned air conditioning controller 1 is as follows.
Is done like. That is, the output unit of the communication unit 10 is
Connected to the input port of control unit 11 and output of control unit 11
The port is connected to the common connection terminal 12c of the changeover switch 12.
Has been done. The connection terminal 12a has a resistance R₁Connected to one end of
Resistance R₁The other end of the condenser C₁End and resistance R
₂Is connected to one end of the condenser C₁The other end of
Have been Resistance R ₂The other end of the resistor R₃One end of the tiger
Is connected to the base of the transistor Tr and the resistance R₃And the other end of
The emitter of the transistor Tr is grounded respectively
There is. The collector of the transistor Tr is a diode 13d
Connected to the anode of and the one end of the exciting coil of the relay 13c
The cathode of the diode 13d and the relay 13c.
The other end of the magnetic coil is the internal power source V_CCConnected to
There is. The output contact of the relay 13c is the drive control terminal T_1,T₂
Is connected in between. The connection terminal 12b is a trier.
Drive control terminal T connected to the gate of the TR_3,T_Fourwhile
A triac TR is connected to.

The air conditioning control device 1 configured as described above operates as follows. That is, when the communication unit 10 receives control data indicating that the controlled device A or the controlled device B is driven from the central processing unit via the signal line L, the communication unit 10 controls the input port of the control unit 11 to the input port of the control unit 11. Output the data indicating that the pulse voltage is output from the output port. Then, the control unit 11 outputs the pulse voltage from the output port to the common connection terminal 12c of the changeover switch 12.

If the common connection terminal 12c of the changeover switch 12 is connected to the connection terminal 12a, the pulse voltage from the output port of the control unit 11 is smoothed by the smoothing circuit 13a.
Entered in. Then, the pulse voltage is applied to the smoothing circuit 13a.
Is smoothed, and a substantially DC positive voltage is applied to the base of the transistor Tr although a slight ripple is included. Then, the transistor Tr is turned on and the non-contact switching circuit 13b becomes conductive. Then relay 1
An exciting current flows through the exciting coil 3c, and the output contact of the relay 13c is turned on (short-circuited). Therefore, if the controlled device A and the commercial power source E ₁ are connected in series between the drive control terminals T _{1 and} T ₂ , a commercial voltage is applied to the controlled device A and the controlled device A is driven. .

After that, when the communication unit 10 receives control data indicating that the controlled device A or the controlled device B is stopped from the central processing unit via the signal line L, the communication unit 10 controls the input port of the control unit 11. Data indicating that the output of the pulse voltage from the output port of the unit 11 is stopped is output. Then,
The control unit 11 stops the output of the pulse voltage from the output port. Then, although detailed description is omitted, the transistor Tr is turned off, and the output contact of the relay 13c is turned off (open).
To do. Then, the controlled device A stops.

On the other hand, the common connection terminal 1 of the changeover switch 12
When 2c is connected to the connection terminal 12b, when the control unit 11 outputs a pulse voltage from the output port, the pulse voltage is applied to the gate of the triac TR. Then, the triac TR until the pulse voltage is applied to the gate when the voltage between the driving control terminal T _3, T ₄ is applied on (conducting), once turned on (conducting) Then conduction current is zero It has a characteristic of maintaining an on (conducting) state and, once the conducting current becomes zero, maintaining an off state unless a pulse voltage is newly applied to the gate.

Therefore, the commercial power source E ₂ and the exciting coil of the relay Ry, which is separately procured and installed, are connected in series between the drive control terminals T _{3 and} T ₄ , and the commercial power source E is placed between the output contacts of the relay Ry. Assuming that ₃ and the controlled device B are connected in series, when the control unit 11 outputs a pulse voltage from the output port, the triac TR turns on (conducts). When the triac TR is turned on (conducted), an exciting current flows through the exciting coil of the relay Ry and the output contact of the relay Ry is turned on (short-circuited). Then, the commercial voltage is applied to the controlled device B, and the controlled device B is driven. After that, when the control unit 11 stops the output of the pulse voltage from the output port, the triac TR is turned off and the output contact of the relay Ry is turned off (open), although detailed description is omitted. Then, the controlled device B is stopped.

Since the air conditioning control device 1 operates as described above, the current consumption capacity of the controlled device for which drive control is desired by the air conditioning control device 1 is within the rated current capacity of the output contact of the relay 13c. If so, the changeover switch 12 is switched to the relay contact output section 13 side, and the controlled device is changed to the one shown in FIG.
The controlled device A can be connected and controlled to drive the controlled device.

If the consumption current capacity of the controlled equipment desired to be driven and controlled by the air conditioning controller 1 is equal to or higher than the rated current capacity of the output contact of the relay 13c, the changeover switch 12
Can be switched to the TRIAC output unit 14 side, and the controlled device can be connected like the controlled device B shown in FIG. 1 to drive-control the controlled device. Of course, in the relay Ry, it goes without saying that the rated current capacity of the output contact of the relay Ry is equal to or higher than the current consumption capacity of the controlled device B and is separately procured and installed.

[0023]

Since the air-conditioning control device of the present invention is configured as described above, by switching the changeover switch, the current consumption capacity of the air-conditioning equipment for which drive control is desired will be the allowable current of the relay contact output section. If it is within the capacity,
Since the construction is completed simply by connecting the desired air conditioning equipment to the relay contact output section via the drive power source, the construction workability is better than that having only the triac output section, and the air conditioning equipment for which drive control is desired. If the current consumption capacity of the equipment exceeds the allowable current capacity of the relay contact output section, a triac output section can be provided with a relay corresponding to the current consumption capacity of the desired air conditioning equipment, and can be used separately. This has the effect of providing an improved air conditioning control device.

[Brief description of drawings]

FIG. 1 is a circuit configuration diagram illustrating an embodiment of an air conditioning control device according to the present invention.

[Explanation of symbols]

 1 Air Conditioning Control Device 11 Pulse Output Unit 12 Changeover Switch 13 Relay Contact Output Unit 14 TRIAC Output Unit A Air Conditioning Equipment B Air Conditioning Equipment L Signal Line

Claims (1)

[Claims] 1. When data is transmitted / received to / from a host control device through a signal line, a pulse is output from a pulse output section based on an instruction from the host control device, and the pulse is output. In an air conditioning control device that drives and controls only air conditioning equipment, a relay contact output unit that is turned on only when the pulse is input, a triac output unit that is turned on only when the pulse is input, and the pulse An air conditioning control device, comprising: a changeover switch for inputting to either a relay contact output section or the triac output section.