JPS63204057A - Air conditioning control system - Google Patents

Abstract

PURPOSE:To perform a changing-over operation forcedly at a main control part and enable a preferential automatic control on termination of operation in an air conditioner by a method wherein a control over a set value is changed over from a sub- control device to a main control device preferentially and forcedly and means for forcedly changing-over operation is arranged at the main control device. CONSTITUTION:When an operation switch S4 is ON and a relay X1 is OFF, a signal of a main control device 2 is sent to an air conditioner 1 from a terminal 5b through a terminal 5c of a normal-open or normal-closed contact X1a. As a main-sub change- over switch S1 is depressed to release this condition, the relay X1 is operated and a temporary control signal of a sub-control device 3 is sent to an air conditioner 1 from the terminal 5a through the terminal 5c. In turn, the relay X1 is self retained under a condition that a terminal 6a and a terminal 6c of a normal-open or normal- closed contact X1b are closed to enable a temporary control for a set value of an air conditioner 1 using a device 3 to be performed. When either the sub to main change-over switch S2 or a forced changing-over switch S3 is depressed, the relay X1 is turned OFF and a main control over a set value of the air conditioner 1 using a device 2 is enabled.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an air conditioning control device that controls setting values for an air conditioner in a manner that allows switching between main and sub settings.

[Conventional technology]

BACKGROUND ART Conventionally, in various air conditioners disposed in various parts of a building or the like, the operation of the air conditioners is generally controlled by giving set values to the air conditioners via an external control device. In recent years, in order to perform more detailed control, a method has been adopted in which a sub-control device that temporarily controls set values is attached to the main control device.

FIG. 4 is a block diagram schematically showing an air conditioning control device equipped with this sub-control device, in which 1 is the air conditioner to be controlled, 2 is the main control device, 3 is the sub-control device,
SO is an output changeover switch that switches control of the set value for the air conditioner 1 to control via the main control device 2 or the sub-control device 3. The output selector switch SO is operated from the sub-control device 3 side as appropriate. Usually, the main controller 2 and the sub-control device 3 are placed far apart, and the sub-control device 3 is provided on the site side. Therefore, when the setting value control of the air conditioner l by the sub-control device 3 is finished, the output changeover switch SO is operated on the sub-control device 3 side, and the control of the setting value of the air conditioner l is returned to the main control device 2 side. ing.

[Problem that the invention seeks to solve]

However, with such conventional air conditioning control devices,
If you forget to return the control of the set value of the air conditioner 1 to the main controller 2 after the operation of the air conditioner 1 with the sub-control device 3 is completed, you may have to go to the site again and operate the sub-control device 3 to change the output. I had to change the selector switch SO. In addition, when the operation of the air conditioner 1 is stopped while controlling the set value using the sub control bag W3 (for example, when the air conditioner 1 is stopped at the end of work signal), the sub control device 3
Unless the output selector switch SO was returned to the main controller 2 side, restarting the operation of the air conditioner 1 on the auxiliary controller 3 side was unavoidable.

[Means for solving problems]

The present invention has been made in view of these problems, and includes a forced switching means on the main control means side for forcibly switching the control of the set value for the air conditioner from the sub control means to the main control means, and A priority switching means is provided for preferentially switching control of the set value from the sub-control means to the main control means based on the operating state of the device.

[Effect]

Therefore, according to the present invention, switching from the sub-control means to the main control means can be forcibly performed on the main control means side, and when the operation of the air conditioner is stopped, the sub-control means can be switched preferentially to the main control means. Automatic switching is also possible.

〔Example〕

Hereinafter, the air conditioning control device according to the present invention will be explained in detail. FIG. 1 is a block diagram schematically showing this air conditioning control device. In this figure, the same reference numerals as those in FIG. 4 indicate equivalent components, and the explanation thereof will be omitted. However, the switching operation of the output selector switch SO in this air conditioning control device is not only performed from the sub-control device 3 side (but also from the main control device 2 side and the air conditioner 1 side).
It can also be done from the side. In other words, the output changeover switch SO is configured to output the S0 output from the sub-control device 3 side.
The switching operation is controlled by a control signal, but the forced switching signal S sent from the main controller 2 side
ol and the operating status signal SO sent from the air conditioner 1 side
This is because the switching operation is also controlled by Z. That is, the air conditioner 1 is controlled by the main controller 2 by the 80 control signal.
It is designed so that it can be switched from the side to the sub-control device 3 side, or from the sub-control device 3 side to the main control device 2 side,
Also, forced switching signal S. I and the operating state signal 5 (12) are configured to preferentially and forcibly switch from the sub-control device 3 side to the main control device 2 side. signal), the switching by these signals has priority.In addition, in this example, the operation status signal Se
t is sent out at the same time as the operation of the air conditioner 1 is stopped.

With this configuration, the output selector switch S
Switching from the sub-control device 3 of the O to the main control device 2 can be forcibly performed on the main control device 2 side, and it is necessary to go to the sub-control device 3 and switch the output changeover switch SO from the sub-control device 3 side to the main control device 2 side. There is no need to switch to That is, even if the sub-control device 3 forgets to return the output changeover switch SO to the main control device 2 side, the output changeover switch SO can be returned to the main control device 2 side in the main control device 2. Output selector switch SO in main controller 2
After returning to the main control device 2 side, it is also possible to switch from the main control device 2 to the sub control device 3 in the sub control device 3 according to the principle of priority.

In this way, the switching algorithm of the output changeover switch SO is realized with priority given to the second one without lowering the priority of the sub-control device 3, so the function of providing fine-grained control, which is the purpose of the sub-control device 3, is reduced. I won't let you. Further, the operation status signal S is generated at the same time as the operation of the air conditioner 1 is stopped. 2 is sent out, the output selector switch SO is preferentially switched from the sub-control device 3 side to the main control device 2 side, and restart of operation of the air conditioner 1 on the sub-control device 3 side is avoided.

FIG. 2 shows a specific circuit example of this air conditioning control device.

In the figure, Sl and S2 are a main to sub changeover switch and a sub-main changeover switch provided on the side of the sub-control device 3, S3 is a forced change-over switch provided on the side of the main control device 2, and S4 is an air conditioner switch. This is an operating state switch that turns off when the operation of No. 1 is stopped. The main-sub changeover switch SL, the sub-main changeover switch S2, and the forced changeover switch S3 are manually operated automatic return type push button switches, and the main-subchangeover switch S1 is a normally open contact type that turns on when pressed.劃-main changeover switch S2 and forced changeover switch S3
is a normally closed contact type that turns off when pressed.

Main-sub changeover switch S1, sub-main changeover switch 32. The forced changeover switch S3 and the operating state switch S4 are connected in series to the DC power supply 4, and the main-sub changeover switch S1
A relay X1 is connected between the operating state switch S4 and the operating state switch S4. And the normally open/normally closed contact Xl of this relay x1
A normally open contact terminal (hereinafter referred to as "A contact terminal") 5a is connected to the sub-control device 3 side, and a normally closed contact terminal (hereinafter referred to as "A contact terminal") 5a is connected to the sub-control device 3 side.
(referred to as b contact terminal) 5b is connected to the main controller 2 side,
The common terminal 5C is connected to the air conditioner l side. That is, the temporary control signal of the set value sent by the sub-control device 3 is transmitted from the a contact terminal 5a to the common terminal 5c to the air conditioner 1.
The main control signal of the set value sent from the main controller 2 is transmitted to the air conditioner 1 from the B contact terminal 5b through the common terminal 5c.
It is intended to be transmitted to In addition, the normally open and normally closed contacts Xl of the relay X1 are located at both ends of the main → sub changeover switch S1.
The a contact terminal 6a of b and its common terminal 6C are connected.

Next, the operation of the air conditioning control device configured as described above will be explained. That is, it is assumed that the air conditioner 1 is currently in operation and its operating state switch S4 is in the on state. Relay X1
When is off, normally open/normally closed contact Xla's b contact terminal 5b
A main control signal from the main controller 2 is sent to the air conditioner 1 via the common terminal 5c. In this state, when the main-sub switching switch S1 is pressed, the relay X1 is activated, and the temporary control signal of the sub-control device 3 is sent to the air conditioner 1 from the a contact terminal 5a through the common terminal 5c. Become. on the other hand,
Relay X1 is a normally open/normally closed contact terminal 6a of a contact X1b.
It is self-maintained by closing the common terminal 6C. Therefore, from now on, it becomes possible to temporarily control the set value of the air conditioner 1 using the sub-control device 3. In such a state, when the sub-production selector switch S2 or the forced selector switch S3 is pressed, the relay X1 is turned off,
The normally open/normally closed contact Xla is switched to the b contact terminal 5b side, and thereby the main control of the set value of the air conditioner 1 using the main controller 2 becomes possible. When the operation of the air conditioner 1 is stopped, the operating status switch S4 is turned off, the relay X1 is always turned off, and the normally open/normally closed contact Xla is connected to the b contact terminal 5.
The state switched to the b side is maintained.

In FIG. 2, the air conditioner 1 is controlled using a relay sequence, but the air conditioner 1 may be controlled using a microcomputer or the like. Figure 3 is an example.

In the same figure, 81° and S2' are the main-sub switching switch and the main-main switching switch provided on the side of the sub-control device 3;
S3' is a forced changeover switch provided on the main controller 2 side. The main-sub changeover switch S1'', the force-main changeover switch S2', and the forced changeover switch S3'' are composed of normally open contact type manually operated automatic return type push button switches that turn on when pressed. When the sub selector switch 81' is pressed, the normally open/normally closed contact
If the sub-generation selector switch S2' or the forced selector switch S3' is pressed to switch to the contact terminal 5a side, or if the operating state switch S4 is turned off, the normally open or
The microcontroller 7 controls the relay X1 to switch the normally closed contact Xla to the b contact terminal 5b. In addition, a function has been added that switches the normally open/normally closed contact Xla to the B contact terminal 5b side and returns the connection to the main controller 2 side after a certain period of time has passed after pressing the main-sub changeover switch S1''. You are free to do whatever you want.

〔Effect of the invention〕

As explained above, according to the air conditioning control device according to the present invention, the forced switching means for forcibly switching the control of the set value for the air conditioner from the sub control means to the main control means is provided on the main control means side, and the Since a priority switching means is provided for preferentially switching control of the set value from the sub-control means to the main control means based on the operating state, switching from the sub-control means to the main control means is not forced on the main control means side. It is also possible to preferentially automatically switch from the sub-control means to the main control means when the air conditioner stops operating. The hassle of is eliminated.

[Brief explanation of the drawing]

FIG. 1 is a block diagram schematically showing an air conditioning control device according to the present invention, FIG. 2 is a diagram showing a specific circuit example of this air conditioning control device, and FIG. 3 is another circuit of this air conditioning control device. A diagram showing an example, FIG. 4 is a block diagram schematically showing a conventional air conditioning control device. 1... Air conditioner, 2... Main control device, 3... Sub-control device, SO... Output changeover switch, Xl... Relay, Xla, Xlb... Normally open/normally closed contact, SL...Main-sub changeover switch, S2...Sub-main changeover switch, S
3... Forced changeover switch, S4... Operation status switch. Patent Applicant Yamatake Honeywell Co., Ltd. Agent Masaki Yamakawa (Two Idiots) Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] A main control means that mainly controls the set value to the air conditioner, a sub control means that temporarily controls the set value to the air conditioner, and a main control means that controls the set value to the air conditioner on the side of this sub control means. In an air conditioning control device comprising a first switching means for switching from the main control means to the sub-control means and a second switching means for switching from the sub-control means to the main control means, the setting value is controlled on the main control means side. forced switching means for forcibly switching from the sub-control means to the main control means; and priority switching means for preferentially switching control of the set value from the sub-control means to the main control means based on the operating state of the air conditioner. An air conditioning control device comprising: