JPH062931A - Control unit for air-conditioning apparatus - Google Patents

Abstract

PURPOSE:To enable a control unit for a single air-conditioning apparatus to function as a control unit for a plurality of air-conditioning apparatus by providing an expansion bus, an external bus connector, and a changeover switch in a system to switch over the changeover switch for the purpose. CONSTITUTION:An air-conditioning apparatus-controlling unit 50 comprises a base unit 51, an expansion input/output interface unit 52, and an expansion bus 53. To the base unit 51 having a first input-output interface 51d necessary for the control of a first air-conditioning apparatus an expansion bus circuit 51a, an external bus connector 51b, and a changeover switch 51c are provided. When the changeover switch 51c is set to the first air-conditioning apparatus, the base unit 51 controls the first air-conditioning apparatus. The base unit 51 controls a second air-conditioning apparatus if the changeover switch 51c is set to the second air-conditioning apparatus and simultaneously an expansion input/output interface unit 52 is connected through the expansion bus 53.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner control unit used in an air conditioner control system (air conditioner DDC system) for directly controlling an air conditioner by a digital signal.

[0002]

2. Description of the Related Art A conventional air conditioning DDC system is shown in FIGS.
Will be explained. FIG. 4 is a system configuration diagram showing an outline of an air conditioning DDC system (an air conditioning control system that directly controls an air conditioner by a digital signal), FIG. 5 is a front view showing a large air conditioner control unit of the air conditioning DDC system, and FIG. FIG. 3 is an explanatory diagram showing an installation state of a small air conditioner control unit of the air conditioning DDC system of FIG.

DDC is an abbreviation for direct digital control. In the air conditioning DDC system shown in FIG. 4, the air conditioning monitoring panel 10, the gate block 30, the large air conditioner control unit 40, the small air conditioner control unit 50, the fan coil unit control unit 60, and the variable air volume unit. A control unit 70, a large air conditioner A, a small air conditioner B,
It is composed of a fan coil unit C and a variable air volume unit D. The gate block 30 and the large air conditioner control unit 40 are incorporated in the control panel 20.

The air conditioning monitoring panel 10 is installed in an air conditioning manager's room. The control panel 20 and the large air conditioner A are installed in the air conditioning machine room. The fan coil unit control unit 60 and the fan coil unit C are installed in a room such as an office, and the small air conditioner control unit 50, the variable air volume unit control unit 70, the small air conditioner B, and the variable air volume unit D are the office or the like. Will be installed in the ceiling of the living room.

The above-mentioned air conditioning DDC system is connected as follows. That is, the air conditioning monitoring panel 10 and the gate block 30 are connected by the local bus L. Each of the large air conditioner control unit 40, the small air conditioner control unit 50, the fan coil unit control unit 60, and the variable air volume unit control unit 70 is connected to the gate block 30 by a control bus M. The large air conditioner control unit 40 and the large air conditioner A are connected by an individual control line N ₁ .
The small air conditioner control unit 50 and the small air conditioner B are connected by an individual control line N ₂ . The fan coil unit control unit 60 and the fan coil unit C are connected to the individual control line N ₃
Connected by. The variable air volume unit control unit 70 and the variable air volume unit D are connected by an individual control line N ₄ .

The air conditioning DDC system described above operates as follows. That is, the air conditioning monitoring panel 10 is
The temperature / humidity setting data and the start / stop data set in step 3 are transmitted to the gate block 30. Gate block 3
0 transmits each received data to the corresponding large air conditioner control unit 40, small air conditioner control unit 50, fan coil unit control unit 60, and variable air volume unit control unit 70. The large air conditioner control unit 40 is for the large air conditioner A, and the small air conditioner control unit 50 is for the small air conditioner B.
The fan coil unit control unit 60 controls the fan coil unit C, and the variable air volume unit control unit 70 controls and monitors the variable air volume unit D based on the received data.

The large air conditioner control unit 40 receives the monitoring data of the large air conditioner A (operating condition / alarm condition / temperature / humidity), and the small air conditioner control unit 50 receives the monitoring data of the small air conditioner B using a fan coil. Unit control unit 60
Indicates the monitoring data of the fan coil unit C, and the variable air volume unit control unit 70 transmits the monitoring data of the variable air volume unit D to the gate block 30, respectively. The gate block 30 transmits the received data to the air conditioning monitoring panel 10. Then, the air conditioning monitoring board 10 outputs each received monitoring data to a display unit (not shown) of the air conditioning monitoring board 10. Therefore, the air conditioning manager can grasp various air conditioning states from the air conditioning monitoring panel 10.

By the way, as shown in FIG. 5, a conventional large-scale air conditioner control unit 40 is composed of a CPU unit 41, a communication unit 42, a DO unit 43, a DI unit 44, an AO unit 45 and an AI unit 46. The control panel 20 is a bulky and large type that is built into the control panel 20.

On the other hand, the small air conditioner control unit 50 of the conventional air conditioner DDC system is replaced by the large air conditioner control unit 40.
Is diverted. Therefore, the small air conditioner control unit 5
Even if it was 0, it was built in the control panel, and it was bulky and large. Therefore, it is impossible to incorporate the small air conditioner control unit 50 into the small air conditioner B, and as shown in FIG.
1 is installed separately, the space for the small air conditioner control unit 50 is secured in the control panel 21, and the small air conditioner control unit 50 is installed on the small air conditioner B by the individual control line N ₂ . It couldn't be done without wiring.

However, in the fan coil unit control unit 60 of the conventional air conditioning DDC system,
It was small and compact.

[0011]

As described above, although the fan coil unit control unit 60 is compact and not bulky, the small air conditioner control unit 50 is bulky and large. There was a point.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an air conditioner control unit which is not bulky and requires a small installation space.

[0013]

In order to solve the above problems, the present invention controls a first air conditioner in an air conditioner control unit of an air conditioner control system which directly controls various air conditioners by a digital signal. An expansion bus circuit, an external bus connector, and a changeover switch are provided in a first air conditioner control unit having a first input / output interface required for
When the changeover switch is switched to the first air conditioner side, it can be used as a first air conditioner control unit, and the changeover switch is switched to the second air conditioner side and an input which is insufficient to control the second air conditioner is used. It is characterized in that it can be used as a second air conditioner control unit by connecting an extension input / output interface unit having an output interface with an extension bus.

[0014]

With the above construction, when the changeover switch is switched to the first air conditioner control side, the air conditioner control unit can be used as the first air conditioner control unit.
Further, when the changeover switch is switched to the second air conditioner control side and the additional input / output interface unit is connected via the external bus connector, the air conditioner control unit and the additional input / output interface unit are combined into a second set.
It can be used as a second air conditioner control unit having an input / output interface required to control the air conditioner.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an air conditioner control unit according to the present invention will be described in detail below with reference to FIGS. 1 is a front view showing a small air conditioner control unit of the air conditioning DDC system, FIG. 2 is an explanatory view showing an installation state of the small air conditioner control unit of the air conditioning DDC system, and FIG. 3 shows application software of the small air conditioner control unit. It is a flowchart.

As shown in FIG. 1, a small air conditioner control unit 50 corresponding to the second air conditioner control unit is composed of a basic unit 51, an additional input / output interface unit 52 and an expansion bus 53. . The basic unit 51 is structurally a conventional fan coil unit control unit corresponding to the first air conditioner control unit, an extension bus circuit 51a, an external bus connector 51b, and a changeover switch 5.
1c is added. The basic unit 51
Has an input / output interface 51d corresponding to the first input / output interface. The input / output interface 51d is similar to the conventional fan coil unit control unit. Further, inside the basic unit 51, application software as shown in FIG. 3 that can be switched by operating the changeover switch 51c is provided.

Expansion input / output interface unit 52
Is equipped with an input / output interface 52a which is insufficient to control the small air conditioner B corresponding to the second air conditioner by the conventional fan coil unit control unit. The additional input / output interface unit 52 is provided with an external bus connector 52b.

The extension bus 53 has a connector 53b which can be inserted and connected to the external bus connector 51b at one end of the multicore cable 53a, and can be inserted and connected to the external bus connector 52b at the other end of the multicore cable 53a. 53c
It is equipped with.

The above-mentioned basic unit 51, additional input / output interface unit 52, and expansion bus 53 can be made into a small air conditioner control unit 50 as follows. That is, the changeover switch 51c of the basic unit 51
Is switched to the small air conditioner control side corresponding to the second air conditioner control side, the application software of the basic unit 51 determines to be “NO” in step 1 shown in FIG. 3 and proceeds to step 3 and External bus connector 51
If the base unit 51 and the additional input / output interface unit 52 are connected to each other by inserting and connecting the connectors 53b and 53c of the expansion bus 53 to the b and 52b, respectively, the basic unit 51 and the additional input / output interface unit 52 are Input / output interfaces 51d and 52a required to control the small air conditioner B in a set
That is, the small air conditioner control unit 50 is provided.

When the basic unit 51 is used as a fan coil unit control unit corresponding to the first air conditioner control unit, the changeover switch 51c of the basic unit 51 is changed to a fan coil corresponding to the first air conditioner control side. Basic unit 5 only by switching to the unit control side
1 is determined to be “YES” in step 1 shown in FIG. 3 and proceeds to step 2, and the basic unit 51 operates as a fan coil unit control unit.

Moreover, since the basic unit 51 is structurally constructed by adding the expansion bus circuit 51a, the external bus connector 51b and the changeover switch 51c to the conventional fan coil unit control unit as described above, it is not bulky. It is made small. Further, since the additional input / output interface unit 52 includes the input / output interface 52a which is insufficient for controlling the small air conditioner B by the conventional fan coil unit control unit, it is not bulky and has a small size. Therefore, a compact air conditioner having the input / output interfaces 51d and 52a necessary for controlling the compact air conditioner B, in which the basic unit 51 and the additional input / output interface unit 52 are connected as a set by connecting with the expansion bus 53 The control unit 50 is also compact and compact.

Therefore, the small air conditioner control unit 50 is
As shown in FIG. 2, it becomes possible to incorporate in the small air conditioner B. That is, the small air conditioner control unit 50 is
Unlike the conventional small air conditioner control unit, it is not necessary to separately provide a control panel near the small air conditioner B to secure a space for incorporating the small air conditioner control unit. Further, since the small air conditioner control unit 50 can be incorporated in the small air conditioner B, the small air conditioner control unit 50 can be installed.
Can be easily connected to the small air conditioner B.

The basic unit 51 is used as a conventional fan coil unit control unit, and the basic unit 51 and the additional input / output interface unit 52 are used.
In the air conditioning DDC system using the small air conditioner control unit 50, which is connected as a set by the expansion bus 53, as a conventional small air conditioner control unit, the same connection as the conventional air conditioner DDC system is made. Since the same operation is performed, detailed description is omitted here.

The present invention is not limited to the above embodiment, and the variable air volume unit control unit may be the first air conditioner control unit if the variable air volume unit control unit is bulky. It goes without saying that the large air conditioner control unit may be the second air conditioner control unit.

[0025]

Since the air conditioner control unit of the present invention is constructed as described above, it can be made compact without being bulky, requires a small installation space, can be incorporated in an air conditioner, and is dedicated to various air conditioners. It is possible to provide an air conditioner control unit that is less expensive than making an air conditioner control unit individually.

[Brief description of drawings]

FIG. 1 is a front view showing an air conditioner control unit according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an installation state of an air conditioner control unit according to an embodiment of the present invention.

FIG. 3 is a flowchart showing application software of an air conditioner control unit according to an embodiment of the present invention.

FIG. 4 is a system configuration diagram showing an outline of an air conditioning DDC system.

FIG. 5 is a front view showing a conventional air conditioner control unit.

FIG. 6 is an explanatory diagram showing an installation state of a conventional air conditioner control unit.

[Explanation of symbols]

 50 second air conditioner control unit 51a expansion bus circuit 51b external bus connector 51c changeover switch 51d first input / output interface 52 expansion input / output interface unit 52a lacking input / output interface 53 expansion bus B second air conditioner

Claims (1)

[Claims] 1. A first air conditioner having an input / output interface required for controlling the first air conditioner in an air conditioner control unit of an air conditioner control system for directly controlling various air conditioners by digital signals. The control unit is provided with an expansion bus circuit, an external bus connector, and a changeover switch,
When the changeover switch is changed over to the first air conditioner side, it can be used as a first air conditioner control unit, and the changeover switch is changed over to the second air conditioner side and an input which is insufficient for controlling the second air conditioner is used. An air conditioner control unit, which can be used as a second air conditioner control unit by connecting an additional input / output interface unit having an output interface with an expansion bus.