JPS5926861B2 - Control device for air conditioning equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control device for air conditioning equipment (hereinafter referred to as air conditioning equipment).

Generally, in air conditioning equipment installed in buildings, etc., the necessary amount of heat is sent from a heat source device such as a boiler to terminal devices such as air conditioners installed in various parts of the building using water or air as a medium to perform heating or cooling. is normal.

In order to prevent excessive supply of heat, this air conditioning equipment is operated by (time schedule) operation based on detection of outside air temperature or operator's understanding of weather conditions.

By the way, the conditions that should be considered when controlling air conditioning equipment are:
In addition to the indoor heat load and outdoor temperature, there is also the amount of solar radiation.

The amount of solar radiation has a particularly strong influence on room temperature in areas that are in contact with the outer periphery of a building. Approximately 50% of the capacity is consumed to compensate for force bombardment (solar radiation).

However, in the conventional operation method as described above, the response to the influence of solar radiation depends on the operator's settings, so it is unsuitable for unmanned operation and it is difficult to respond quickly to temporal changes in weather conditions. However, conventional air conditioning equipment was not always optimally controlled.

This invention was proposed with the above-mentioned considerations in mind.
In addition to conventional conditions such as heat load and outside temperature, solar radiation is measured with a sensor such as a solar radiation measuring device, and weather conditions can be accurately grasped from this and seasonal and time of day conditions. The purpose of this project is to optimally control air conditioning equipment without increasing the size of the equipment by taking into account the effects of radiation, and to obtain energy-saving effects.

The present invention will be explained below based on one embodiment shown in the drawings.

The figure is a block diagram showing a schematic configuration of an air conditioning system according to the present invention.

In the figure, 1 is a heat source device such as a boiler, 2 is a terminal device such as an air conditioner, and 3 and 4 are piping, which are an outgoing pipe and a return pipe, respectively.

5°6.7 is a valve, and 8 is a pump.

9 is a fuel tank, 10 is a fuel pipe, and 11 is a fuel valve, which constitute an air conditioning system.

12 is a controller, 13 is an outside air temperature measuring device, 1
4 is a solar radiation measuring device, 15 is a weather condition determining device, 16 is a temperature setting device, and 17 is a process temperature measuring device.

The solar radiation measurement device 14 is composed of a sensor such as a CDS, a selenium photocell, etc., and is installed in a place where it is not affected by the surroundings, such as a rooftop.

This measuring device 14 detects the amount of solar radiation a and outputs a corresponding amount of solar radiation signal S to the weather condition determiner 15.

Signals c and d indicating the season and time are respectively input to the weather condition judger 15, so that these signals
The weather conditions are accurately grasped by the signals c and d, and the weather signal e is output to the temperature setting device 16.

On the other hand, the outside air temperature f is measured by an outside air temperature measuring device 13, and a temperature signal g is output from this measuring device 13 to the temperature setting device 16.

The temperature setting device 16 sets a process set value SP based on the weather signal e and the temperature signal g, and sends it to the controller 1.
Output to 2.

On the other hand, the process temperature measuring device 17 measures the temperature of the hot water flowing into the outgoing pipe 3, and this is input to the controller 12 as a process value P■.

The controller 12 outputs a control signal OP so that 5p-pv=o, for example, opens and closes the fuel valve 11.

For example, when the hot water temperature (that is, the process value PV) is lower than the process set value SP, the control signal OP is output to close the fuel valve 11, while the process value P
When (2) is smaller than the process set value SP, the control signal OP is output so as to open the gate.

Furthermore, since the amount of solar radiation varies depending on the time and direction, for example, if the area that touches the outer periphery of buildings such as buildings is zoned according to direction, it will be easier to allocate the amount of heat according to the time schedule according to direction. .

For example, in the morning, the amount of solar radiation is low in the west and north directions, so the valve 7 for the terminal equipment 2 installed in this direction is used as an opening source compared to the valve 7 in other directions, and in the afternoon, on the other hand, By adjusting so that the amount of heat can be distributed even more effectively.

As described above, according to the present invention, since the amount of solar radiation is taken into account as a condition for operating the air conditioner, higher quality control can be performed compared to conventional control methods.

Since the amount of solar radiation is automatically measured and the weather is determined along with conditions such as season and time, it becomes easy to operate this type of air conditioning equipment unmanned.

Furthermore, by automatically understanding the weather conditions from moment to moment, it becomes possible to drive in response to changes in the weather.

As a result, fine-grained operation is possible, and only the necessary amount of heat is distributed from the heat source equipment when it is needed, so there is no waste in operation, and even if the amount of solar radiation mentioned above is added to one of the conditions, the overall equipment configuration will be large. Moreover, the energy saving effect is significant.

[Brief explanation of drawings]

The figure is a block diagram showing one embodiment of the present invention. 0 1... Heat source equipment, 2... Terminal equipment, 3
, 4... Piping, 5, 6, 7... Valve, 9... Fuel tank, 11... Fuel valve, 12... Controller, 13...
・External temperature measuring device, 14... Field radiation measuring device, 15
...Weather condition determiner, 16...Temperature setting device, SP...Process setting value, P■...
...Process value, a...Decade amount, f...
Outside air temperature.

Claims (1)

[Claims] 1. A solar radiation measuring device that detects solar radiation, a weather condition determiner that uses the solar radiation output signal of the solar radiation measuring device as one input and signals indicating the season and time as other inputs, and detects the outside temperature. an outside air temperature measuring device, a temperature setting device having one input of the temperature output signal of the open air temperature measuring device and the other input of the weather output signal of the weather condition determination device, and a heat source such as a fuel tank and a boiler. A fuel valve installed between the equipment,
The controller includes a temperature measuring device that measures the temperature of hot water flowing from the heat source device to the terminal device, and a controller that receives as input the process setting value set by the temperature setting device and the process value measured by the temperature measuring device. A control device for air conditioning equipment, characterized in that the fuel valve is opened when the process value>process value is reached and the fuel valve is closed when the process value>process value is reached.