JPS6111542A - Air-conditioning system - Google Patents

Abstract

PURPOSE:To save energy without operating primary side uselessly by a method wherein the operation of primary side cold or hot water generating machine is controlled by existence or non-existence of heat request and secondary side equipments are operated when the heat request exists and the temperature of cold or hot-water is within a predetermined temperature range. CONSTITUTION:A control unit 25 is consisting of a microprocessor or so-called mu-CON, which is controlled by a program, and controls an operating unit 21, a temperature detecting unit 22 and the operation of secondary equipments 7a-9a, points 10, 12a as well as primary side equipments by processing signals from a timer unit 23 while monitors spaces B, C to be air-conditioned or the operating conditions of the primary side equipments through time division monitoring. A local controller 20a decides whether the heat request exists or not exist in the space A to be air-conditioned by comparing a set temperature, set in an operating unit 21, with the detected temperature of a temperature detecting unit 22. Thereafter, the local controller 20a decides whether the temperature of cold or hot-water, which is detected by primary side cold or hot-water temperature detecting terminal 5, is within a predetermined temperature range or not and puts fans 7a-9a as well as a three-way valve 12a ON when the decision is YES, then starts the counting of an ON clock.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention has a cold/hot water generator as a primary side, a radiator as a secondary side, and supplies cold/hot water obtained on the primary side to the secondary side. This invention relates to an air conditioning system that heats and cools a space, that is, a space to be air-conditioned.

[Conventional technology]

A conventional system of this type is shown in FIG. In the figure, 1 is a cold/hot water generator, 2 is a cooling tower, 3 is a cooling water pump, and 4 is a cold/hot water pump, which constitute the primary side that supplies cold/hot water. Note that 5 is a hot water detection end that detects the temperature of cold and hot water supplied from the primary side. 6 is the primary side central control panel, which controls the operation of related equipment on the primary side, the status table of .

A to C are mutually independent air-conditioned spaces 7a to 9a.

7 b-! l b, 7 c to 9 c are air-conditioned spaces A-
10 is a blower installed corresponding to each radiator, lla to llc are temperature detectors respectively installed in the covering space IIJ space A-C,
Reference numerals 12a to 12c are three-way vias that bypass and cut off the supply of cold and hot water to the radiators provided in the air-conditioned spaces A to C, respectively, and these constitute the secondary side.

14+, on the primary side, the temperature of cold and hot water is detected by the cold and hot water detection end 5, and the capacity of the cold and hot water generator 1 is controlled or started and stopped, and the temperature of the cold and hot water is automatically set to a target value within a certain range. A control loop is configured. On the other hand, on the secondary side, the temperature of the air-conditioned space A-C is detected by the temperature detectors 1.1a-11C, and the radiators 7a-9a, 7b-9b, 7c-
Controls the amount of cold and hot water flowing to 9c and the capacity of the blower 10,
An automatic control loop is configured to set the temperature of the air-conditioned spaces A-C to a target value. The start of operation on the secondary side was performed by manual operation in Step 2, after artificially confirming that the primary side was operating, and then the temperature control of each air-conditioned space was automatically performed by temperature detection using a temperature detector. be exposed.

[Problem that the invention attempts to solve]

As mentioned above, since the primary side and the secondary side are only related to each other by the physical quantity of 1 cooling 1 water temperature,
The heat demand of the secondary side relative to the primary side is 4J indirect. Therefore, the final temperature information of the air-conditioned space is
There was a considerable delay in the transmission of the water to the cold water generator, which forced the cold/hot water generator to generate the required amount of water, resulting in wasted drive energy.

Manoko: As mentioned above, the related equipment on the primary side is controlled in order to improve their maintainability, but the centralized control on the secondary side is only performed in a part of the large-scale air conditioning system. Even if it had been done, the relationship with the primary side would be indirect via the temperature of cold and hot water, and problems related to - would still exist.

In small and medium-sized air conditioning systems where the secondary side is not centrally controlled, the primary side operator and the secondary side operator are often different people, making it easy for problems to occur. especially,
In the case of air-conditioning systems such as small and medium-sized tenant hilding, the usage time of each room may not be constant, or differences in heat load may cause the air conditioning usage to increase.
was causing a big problem.

[Means for solving problems]

The present invention provides an air conditioning system J that solves the problems listed in -1-.
- The means is to provide a cold/hot water generator as a primary side, a radiator provided in each air-conditioned space as a secondary side,
An air conditioning system J that supplies hot and cold water obtained on the primary side to the secondary side to heat and cool the air-conditioned space. means for determining whether the temperature of cold and hot water is within a predetermined temperature range; means for controlling the current operation of cold and hot water on the primary side depending on the presence or absence of a heat request; A local controller having means for operating the secondary side equipment when the water temperature is within a predetermined temperature range is provided in each covering space 1td.

[For production]

The local controller 1-roller installed in each air-conditioned space directly controls the cold/hot water generator on the primary side depending on the presence or absence of heat demand in the air-conditioned space. This eliminates unnecessary operation and saves energy.

In addition, the local controller displays the operating status of other air-conditioned spaces and primary side equipment, and also measures the operating time of each secondary side equipment, so in each air-conditioned space, the primary side and other It is possible to centrally monitor the next equipment, and also to manage the energy consumption of each air-conditioned space, thereby preventing trouble from occurring.

〔Example〕

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

FIG. 1 shows an embodiment of the present invention, in which the same parts as in FIG. 4 are given the same reference numerals. In the figure, 20a-2
0c is a local controller 1-roller provided in each of the air-conditioned spaces A-C, which are connected to each other and to the primary side via a pass line L, and transmit and receive signals via the pass line I. It is designed to do this. Note that since all of the local controllers 2 (la to 20c) have the same configuration, one of them, 20a, will be described in detail with reference to FIG.

In FIG. 2, the local controller 20a includes an operation section 21, a temperature detection section 22, a timer section 23, a recording section 24, and a control section 25 to which these are connected.
The control unit 25 is provided with a display 25a that performs various displays described later.

Operation unit 21 is empty! It has means for starting and stopping J, temperature setting means, means for selecting automatic control and manual operation of secondary side equipment, operating means for manual operation, means for setting half-way on and off when starting and stopping the air conditioning timer, etc. Therefore, the generated signal is applied to the control section 25.

The temperature detection section 22 detects the temperature of the air-conditioned space and emits a signal according to the detected temperature, which is controlled by the control section 25.
to be applied. The timer unit 23 is used for comparison with the set time when the air conditioning timer starts and stops.The recording unit 24 is for recording the operating status of the air-conditioned space A. The recorded integration results can be used when apportioning the energy interest required on the primary side.

The control section 25 consists of a program-controlled microprocessor, so-called μmC0N, and processes signals from the operation section 21, temperature detection section 22, and timer section 23, and processes signals from the secondary side devices 7a to 9a, 10 points 12a, and the primary side. It controls the operation of equipment and monitors the operating status of other air-conditioned spaces B and C and primary side equipment on a time-sharing basis. The display 25a shows the temperature of the air-conditioned space A, the time, the contents of the time schedule for the Kyma operation, and the information of each covering lta.
The operating status of the space, the operating status of the primary side equipment, and the operating status of the safety device are displayed.

Next, the control unit 2 of the local controller 20a
The work for automatic control performed by step 5 according to a predetermined program will be explained with reference to flowchart 1 shown in FIG.

The local controller 20a in FIG. 2 starts its work when the power is turned on, and first in step S1, it is determined whether or not the timer that has been running for seven minutes in the TI production section 21 has been turned on. If the determination is NO, then in step S2 it is determined whether or not the manual start switch of the operation unit 21 is on. If the determination is YES, the process advances to the next step S3, where the settings are made using the operation unit 21. By comparing the set temperature and the temperature detected by the temperature detection unit 22, the conditioned space A
It is determined whether there is a heat request or not. If the determination in step S3 is YES, the primary side is turned on in the subsequent step S4 to start the operation of the cold/hot water generator 1. Then, in step S5, it is determined whether the temperature of the cold and hot water detected by the cold and hot water detection end 5 on the primary side is within a predetermined temperature range, and if the determination is YES, the air blowing tMj7a to 9a is performed in step S6. The three-way valve 12a is turned on, and in the subsequent step S7, the on-time measurement of the blowers 7a to 9a and the three-way valve 12a is started. After completing this step S7, the process returns to step s1 again.

Now, assuming that the determination in step S1 is y r < s, step s2 is skipped and step '3
Proceed to step 3 to determine whether there is a heat request. Further, if the determination in step S2 is N (,), step S2 is reached.

Proceed to Step SIO, turn off the primary side, and then proceed to Step Sll, where air blowers 1 & 7a to 9a and 3-way valve 1 are turned off.
2a, the process proceeds to the subsequent step S12, where the timing operation is turned off and stopped, and the process proceeds to step S1.
Returning to step s2, steps Sl, S2 . Repeat SIO to S12.

If the determination in step S3 is No, in steps 314 to S16, the primary side is turned off, the blower is turned off,
After turning off the three-way valve and turning off the timer, the process returns to step S3, and steps 33, 314 to S16 are repeatedly executed until the determination in step S3 becomes YES.

Furthermore, if the determination in step S5 is NO, the process proceeds to step S8, where the blower and three-way valve are turned off, and then the process proceeds to step S19, where the timer is also turned off, and the process returns to step S5. Return to steps S5 and S18.3 until the determination in step S5 becomes YES.
Repeat step 19.

Although not shown in the above flowchart, the operating status of the primary side and other secondary side equipment is collected during time sharing and displayed on the display 25a, and timekeeping is performed by the recording unit 2.
Recorded at 4.

In addition, in the case of manual control by manual operation of the operation unit 21, the work according to the flow shown in FIG. 3 is not performed, and the blower 10
Manual control and the like are performed directly based on the operation unit 21.

In addition, from the control section 25 to the secondary side devices 7a to 9
The operation signal may be transmitted to the terminals a and 10.12a by wire or wirelessly.

〔Effect of the invention〕

According to the present invention, many effects such as those described below can be obtained.

(1) Heat loss is reduced because the heat demand on the secondary side of the system is directly transmitted to the primary side.

(2) There is no particular need for a manager's room or a manager, and convenience and maintainability can be achieved in that the air conditioner user can manage the operating status of the entire system no matter which air-conditioned space he or she is in.

(3) By recording the usage status of the secondary side, the energy charge required for driving the primary side can be accurately apportioned.

[Brief explanation of drawings]

1 to 3 show embodiments of the present invention, FIG. 1 is a schematic configuration diagram of the system of the present invention, FIG. 2 is a detailed configuration diagram of a part of FIG. 1, and FIG. 3 is a diagram of the system according to the present invention. FIG. 4 is a flowchart for explaining the operation of the system, and FIG. 4 is a diagram showing an example of a conventional system. 1... Hot water generator, 5... Cold/hot water temperature detection end, 7 a to 9 a, 7 b to 9 b,
7 c ~ 9 c - radiator, 20a ~ 20c...
... Local controller, 22 ... Temperature detection section, 24 ... Recording section, 25 ... Control section, 25a ... Display unit .

Claims (2)

[Claims] (1) The cold and hot water generator is the primary side, and the radiator installed in the air-conditioned space is the secondary side, and the cold and hot water obtained on the primary side is the secondary side.
In an air conditioning system that heats and cools the air-conditioned space by supplying it to the next side, there is a means for determining whether there is a heat demand for the air-conditioned space and whether the temperature of cold and hot water on the primary side is within a predetermined temperature range. means for determining whether or not there is a heat request; An air conditioning system characterized in that a local controller having operating means is provided in each air-conditioned space. (2) The cold and hot water generator is the primary side, and the radiator installed in the air-conditioned space is the secondary side, and the cold and hot water obtained on the primary side is the secondary side.
In an air conditioning system that heats and cools the air-conditioned space by supplying it to the next side, there is a means for determining whether there is a heat demand for the air-conditioned space and whether the temperature of cold and hot water on the primary side is within a predetermined temperature range. means for determining whether or not there is a heat request; A local controller having a means for operating, a means for displaying the operating status of the primary side equipment and other secondary side equipment of the air-conditioned space, and a means for measuring and recording the operating time of the secondary side equipment is installed in each target. An air conditioning system characterized by being installed in an air-conditioned space.