JPH0799275B2 - Air conditioning system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a control method for an air conditioning system, and particularly to control of sequential activation of a plurality of air conditioning units for a machine such as a switchboard or a computer that requires a constant air conditioning function. Air conditioning system that can

[Prior Art and Problems to Be Solved] Conventionally, in air conditioning systems in such fields, it is planned to suppress the capacity of the power supply panel and the power supply device as much as possible to prevent the initial cost from increasing and to improve the energy efficiency of the device. It On the other hand, the air conditioning unit is incorporated in each exchange device having an independent load, and each is independently controlled and operated by an internal thermostat.

However, in many cases, the return air is common indoor air.

For this reason, conventionally, when the equipment is started up (from rest) and the indoor air is often at approximately the same temperature in each equipment, it is possible that the time when the thermostat is started and stopped will be very close in time. Therefore, it was necessary to start them sequentially.

By the way, the conventional sequential activation control method of this type is controlled by a large air conditioning control panel according to the size of the entire air conditioning unit, or it is left to the individual control of the air conditioning unit, etc., and the sensor function is also integrated. In the case, the control method was not unified with the case of making it individual.

Regarding the conventional control method of the air conditioning system, the status of the air conditioning units B _{1 to} B _n can be collected by the large-scale centralized control panel A as shown in FIG. 2 (a), and the thermo functions C _{1 to} C _n can be collected. _{When n} is individually added to the air conditioning units B _{1 to} B _n , it can be activated depending on the individual control conditions, but when the thermo function C is a batch, there is only one detection, so it is determined in advance. I can only take the action in the sequence. Both of them have uncertain control that matches the actual situation, and it is necessary to collect the interface conditions between the air conditioning units in the large-scale centralized control panel A, which requires a considerably expensive control system. Furthermore, considering the addition of air conditioning units, etc., the design becomes enormous.

In the air conditioning system shown in FIG. 2 (b), there is no connection between the air conditioning units B _{1 to} B _n , and especially when the thermo function C is a _single unit, all air conditioning units B _{1 to} B _n are activated at the same time. Therefore, power supply facilities (commercial power supply capacity and engine generator capacity) that satisfy the inrush current of all air conditioning units are required.

As described above, in the conventional air conditioning system, (1) reliable control that matches the actual situation is not reliably performed.

(2) A large-scale air-conditioning system control panel is required, which is expensive (need to consider until the end of the period).

(3) It is difficult to deal with the addition or change of air conditioning units (increase in initial price).

(4) In order to satisfy the inrush current at the time of starting operation and starting and stopping by the thermo function, it is necessary to consider multiple units.

There was a drawback that it would increase the scale and price of the power supply equipment.

In particular, recently, a small-sized sequencer [Programming controller] has become widespread, and its reliability has been greatly improved and its cost has been reduced. The present invention intends to construct an inexpensive and easy-to-use centralized control system by making good use of these commercially available small capacity sequencers and the like. In addition, the number of installed air-conditioning units differs on a case-by-case basis. For example, in the case of an exchange, 2-5 units are most installed per station, and 10-20 units are installed in the case where there are many installed units.

In the conventional control system, the central control system
The system had to be compatible with about 20 units. The present invention prepares a centralized control system for 2 to 5 units, which has the largest number of installed units, as a standard product in comparison with the conventional system, and sets 2 to 5 units as one control group, and the installed number exceeds 2 to 5 units. On the other hand, the system is divided into a plurality of groups having a standard control system, and sequential activation control including inter-group control is performed.

[Means for Solving Problems] An air conditioning system of the present invention for solving the above-mentioned conventional problems is
In an air conditioning system including a plurality of air conditioning units divided into a plurality of prioritized groups, each of the plurality of air conditioning units divided into the plurality of groups has a thermo function for starting and stopping. Built-in, in each group, the air conditioning units in the group are sequentially activated so that multiple air conditioning units in the group are not activated at the same time, and they are activated in the group with higher priority than their own group. Central control that delays the startup of the air conditioning units in its own group if there is an inside air conditioning unit or an air conditioning unit with a start signal or if there is an active air conditioning unit in a group whose priority is lower than its own group It is configured as a board.

EXAMPLES Examples of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a block diagram of an air conditioning system according to an embodiment of the present invention. In the figure, the air conditioning unit ^{_{B 1 ~B n, B 1 1}} ~B
_{^{n 1, B 1 n ~B n}} n each thermo function C ₁ is _{^{~C n, C 1 1 ~C n}} 1, C 1 n
~ C _n ⁿ is built in. The air conditioning unit ^{_{B 1 ~B n, B 1 1}} ~
B _n ¹ , B ₁ ^{n to} B _n ⁿ are grouped into groups 1 to 3, respectively, and the air conditioning units B ₁ , B ₁ ¹ , and B ₁ in each group 1, 2, and 3 are
Central control boards A ₁ , A ₂ , and A _n are installed in B ₁ ⁿ . Then, the centralized control board A ₁ to A _n by controlling the between groups 1-3 and within the group, the air conditioning unit ^{_{B 1 ~B n, B 1 1}} ~B n 1 between the intra-group and group, as B _{1 ⁿ} ~B ^{n n} does not simultaneously activated, it is obtained by the way it is reliably activated sequentially like during start / stop the driver at the start and thermo function.

Examples of the present invention will be described in more detail. FIG. 3 is a block diagram of the centralized control system, and FIG. 4 is a flow chart of a program for operating the system represented by this block diagram.

Of course, the control system on the air conditioning unit side also uses the sequencer 12.

The input signal is the signal 10 that is being activated from the centralized control system of the upper group or that there is a start signal in the upper group,
The signal 11 being activated is input from the lower group. A start signal is sent from the control system of each air conditioning unit in the group.
13 to 18 (thermo: ON, restart prevention timer: ON, other safety device status: OK start signal is satisfied) is input.

However, in order to accept the activation signals 13 to 18 in the group, the pre-input priority circuit generally used in the control of the sequencer 12 is used, and if any one of the units issues the activation signals 13 to 18 first, the centralized control system sends it. Accept and continue to ignore the activation signals 13-18 of other units that are issued later. (If two or more activation signals 13-18 are set at the same time, the faster one in the scanning order of the sequencer 12 is accepted. When the activation is completed and reset, the subsequent first activation signals 13-18 are accepted again.) If the activation signals 13 to 18 are received, there is no activation signal 10 in the upper group, and there is no activation signal 11 in the lower group, the activation command is issued to the activation air conditioning unit in the group. After the start command, for example, after 10 seconds, the start is completed.

After the start-up is completed, the state returns to the initial state, and if the start-up signal 10 is output in the higher-order group, the start-up is started in the higher-order group. If there is no signal in the upper group, the activation signals 13-18 in the group
Has priority. If there is no activation signal 13-18 in the group, it is the activation signal 11 of the lower group, and if there is a signal, the activation starts in the lower group.

Since the centralized control panels A _{1 to} A _n are built in the air conditioning unit in the group, a large-scale control panel as shown in FIGS. 2 (a) and 2 (b) is not required, which is inexpensive and reliable. A control method is possible.

[Effects of the Invention] As described above, the present invention is an air conditioning system including a plurality of air conditioning units divided into a plurality of prioritized groups. Each air conditioning unit has a built-in thermo function for starting and stopping, and each of the groups has
In order to prevent multiple air conditioning units in the group from starting at the same time, activate the air conditioning units in the group one after another,
When an activated air conditioning unit or an air conditioning unit with a start signal exists in a group whose priority is higher than its own group, or when an activated air conditioning unit is in a group whose priority is lower than its own group. With a centralized control panel that delays the startup of the air conditioning units in its own group, it is compact, simple, easy to handle, and has a centralized control mechanism that enables highly reliable and economical sequential startup control. An air conditioning system can be realized.

[Brief description of drawings]

FIG. 1 is a block diagram of an air conditioning system according to an embodiment of the present invention, FIGS. 2A and 2B are block diagrams of a conventional air conditioning system, and FIG. 3 is a block diagram of a centralized control system. FIG. 4 is a flow chart of a program for operating the system of FIG. A ₁ to A _n: centralized control board ^{_{B 1 ~B n, B 1 1}} ~B n 1, B 1 n ~B n n: the air conditioning unit ^{_{C 1 ~C n, C 1 1}} ~C n 1, C 1 n ~ C _n ⁿ : Thermo function A: Large-scale centralized control panel C: Centralized thermo function

Front page continuation (72) Inventor Terunobu Tanaka, 5-33-1 Shiba, Minato-ku, Tokyo NEC Corporation Stock company (72) Inventor Tsukasa Okamoto 5-33-1, Shiba, Minato-ku, Tokyo NEC Corporation In-house (72) Inventor Kashifumi Sawada 1-1239 Umeda, Kita-ku, Osaka City, Osaka Prefecture New Hankyu Building Daikin Industries, Ltd. (72) Inventor Shunsuke Guro 1-12-12 Umeda, Kita-ku, Osaka City, Osaka No. 39 New Hankyu Building Daikin Industry Co., Ltd. (72) Inventor Satoshi Kamata 1304 Kanaoka-cho, Sakai City, Osaka Prefecture Daikin Industry Co., Ltd. Kanaoka Plant, Sakai Works (72) Inventor Isao Nomura 1304, Kanaoka-cho, Sakai City, Osaka Prefecture Daikin Industries, Ltd. Sakai Plant Kanaoka Plant (72) Inventor Shoji Matsubara 1304, Kanaoka Town, Sakai City, Osaka Prefecture Daikin Industries Ltd. Sakai Plant Kanaoka Plant (56) Reference JP-A-60-253748 (JP, A) Kai 48-19052 (JP, A) JP 61-3939 (JP, A)

Claims (1)

[Claims] 1. An air conditioning system comprising a plurality of air conditioning units divided into a plurality of prioritized groups, wherein each of the plurality of air conditioning units divided into a plurality of groups is activated or stopped. In addition, it has a built-in thermo-function to prevent the simultaneous activation of multiple air conditioning units in the group, so that each group has a higher priority than its own group. When there is an active air conditioning unit or an air conditioning unit that has a start signal in a certain group, or when there is an active air conditioning unit in a group that has a lower priority than its own group, the activation of the air conditioning unit in its own group An air conditioning system characterized by being provided with a central control panel for delaying.