JPS5941435Y2 - Load factor detection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a load factor detection device, and more particularly to a load factor detection device for a heat source device that performs heating or cooling by circulating a heat medium between the device and the load device.

In conventional load factor detection devices, the load factor is determined by directly detecting the load state using a heat flow meter, and an expensive heat flow meter is required.

Moreover, when controlling a heat source device according to the load factor, a deviation may occur between the actual operating load of the heat source device and the load factor due to a decrease in the performance of the heat source device. There was a lack of heat.

An object of the present invention is to provide a load factor detection device that solves the above-mentioned technical problems, detects the load factor without using a heat flow meter, and enables accurate control.

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

FIG. 1 is a system diagram of an embodiment of the present invention.

The heat source device 1 and the load device 2 are connected to each other via conduits 3 and 4, and the heat medium heated or cooled by the heat source device 1 is guided to the load device 2 via the conduit 3.

The heat medium that has been cooled in the load device 2 is returned to the heat source device 1 via the pipe line 4.

A temperature detector 5 is provided in the middle of the pipe 4, and the temperature of the heat medium detected by the temperature detector 5 is sent to a temperature controller 6.
is input.

The temperature regulator 6 controls the heat source device 1 to turn on and off so that the temperature of the heat medium becomes a preset value.

That is, the heat source device 1 is operated at an operating rate of 100% when the temperature of the heat medium is lower than the set value, and is stopped at an operating rate of 0%, that is, the operation is stopped when the temperature of the heat medium is lower than the set value.

The operating state of the heat source device 1 is given to the load factor detection device 7.

The load factor detection device 7 includes an input circuit 8, a central processing circuit 9, an output circuit 10, and a display 11.

A signal indicating whether the operation rate of the heat source device 1 is 100% or Oφ is sent to the central processing circuit 9 via the input circuit 8.
given to.

The central processing circuit 9 performs sampling m times at every predetermined time JT within a predetermined period T, obtains the operating time of each operating rate, and performs a binary calculation of the load factor.

The obtained load factor is displayed on the display 11 via the output circuit 10.

For example, assume that the operating rate of the heat source device 1 fluctuates as shown in FIG.

In Figure 2, the operating rate from time [0 to [1] is 1o
0% from time [1 to t2, 100% from time t2 to t3, and from time [3 to t4]
Up to 0%.

In the heat source device 1 controlled in this way, the average operating rate X from time t1 to [3] is expressed by the first equation.

Here, if the load when the operation rate of the heat source device 1 is 100% is 100%, the average operation rate X is approximately approximated to the average load rate.

Therefore, by calculating the average operating rate over a certain period of time T in the central processing circuit 9, the average load factor is calculated.

According to such a load factor detection device 7, the load is set to 100 U when the operation rate of the heat source device 1 is 100 U.

Therefore, when controlling the heat source device 1 based on the load factor detected by the load factor detection device 7, accurate control can always be performed regardless of the performance of the heat source device.

Although the above-mentioned embodiment is a case where the heat source device 1 is controlled in two positions by the temperature controller 6, the present invention can also be implemented when performing multi-position control of three or more or when performing continuous control. .

1. For example, assume a case where a plurality of heat source devices are controlled at three positions: 100%, 50%, and 0%.

In this case, the control signal is set to high level when the operating rate is 50% or more, and the control signal is set to low level when the operating rate is less than 50φ.

By doing so, it is possible to perform a binary operation on the ratio of the time when the heat source device is at a high level and the time when it is at a low level for each heat source device.

Therefore, the average load factor can be determined from the time ratio obtained for each heat source device.

Therefore, by multiplying the average load factor by a predetermined constant, for example, 115 in the case of five heat source devices, the overall average load factor can be calculated.

In the case of continuous control, after converting the continuous control signal into a digital signal, the signal is set to a high level when the value is higher than a predetermined value, and set to a low level when the value is smaller than the predetermined value. As in the case of multi-position control, the overall average load factor can be determined.

As described above, according to the present invention, the load factor is calculated indirectly from the operation rate of the heat source equipment, so an expensive heat flow meter as in the past is not required, and equipment costs are reduced.

Moreover, since the operation rate and load rate of the heat source equipment correspond,
Accurate control can be performed at all times.

[Brief explanation of drawings]

Figure 1 is a system diagram of one embodiment of the present invention, and Figure 2 is a heat source device 1.
It is a figure showing the fluctuation of the operating rate of. 1...Heat source machine, 2...Load device, 6.
... Temperature controller, 7 ... Load factor detection device, 9 ... Central processing circuit, 11 ...
display.

Claims (1)

[Claims for Utility Model Registration] A load factor detection device for a heat source device that performs heating or cooling by circulating a heat medium between the load device and whose operating rate is controlled by a temperature controller, comprising: means for detecting the operating rate a plurality of times within a predetermined time and calculating a ratio of the time when the operating rate is greater than a predetermined value and the time when the operating rate is less than a predetermined value; and displaying the ratio as a operating load rate. A load factor detection device comprising: means for detecting a load factor.