JPS61237954A - Total heat consumption controlling system for air-conditioning equipment - Google Patents

Abstract

PURPOSE:To provide an excellent device capable of uniform air conditioning, by a system wherein each air-conditioning equipment is provided with a water valve for controlling water feed quantity (and heat consumption). CONSTITUTION:The device comprises temperature sensors 18a, 18b for feed water (a) and return water (b) which are cold water or hot water, a return water flow rate sensor 20, a device 22 for periodically measuring these quantities, a processor 24 for calculating the total heat consumption from the temperature difference between feed water and return water and the return water flow rate, a set point output device 26, and a regulator 28 for regulating the opening of the water valve 14a on the basis of the set point and the temperature of air flown off from heat-exchanging poart 30 (measured by the temperature sensor 32). When cold water is flowing in the heat-exchanging part to each air-conditioning equipment, a set point (y) increased by DELTAy each time the total heat consumption (x) exceeds a heat consumption reference level X by DELTAx is outputted to the regulator to constrict the water valve, thereby reducing the quantity of cold water flowing into the heat exchanger. Similar outputs are supplied to regulators in other air-conditioning equipments.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to air conditioning equipment that uses cold water and hot water for heating and cooling inside buildings, and is a method for suppressing the total demand for heating and cooling during peak periods such as midsummer and midwinter. This will equalize the suppression of air conditioning.

(Prior Art) A conventional air conditioning system is shown in FIG. The cold water/hot water source 10 that supplies cold water or hot water all at once has a plurality of air conditioning equipment 12a, 12.
Water is supplied to ports b and 12c through a pipe 16, and the amount of water supplied is collectively controlled by a valve 14.

(Problem to be solved by the invention) In the method of the prior art, the amount of water supplied is collectively suppressed, and the amount of heat consumed by each air conditioning equipment is not individually controlled. Variation occurred.

Additionally, the water flowed more easily to the side of the air conditioner where the resistance was lower, resulting in uneven air conditioning.

An object of the present invention is to provide an excellent device that can eliminate the above-mentioned problem of temperature variations on the air conditioning side and perform uniform air conditioning.

(Means for Solving the Problems) A feature of the present invention for achieving the above object is that in a system that supplies heat from a cold water/hot water source to a plurality of air conditioners via water pipes, , a measuring device that measures the temperature and water flow rate of water supply and return water, a processing device that calculates the total amount of heat consumed according to the output and generates an output when the value exceeds a predetermined value, and outputs a set value according to the output. A set value output device is provided, and a water valve for adjusting the amount of water for each air conditioner, and a controller for adjusting the opening degree of the water valve according to the set value and the output temperature of the air conditioner are provided, and the set value is , for each increase in the predetermined value (Δx) of the total heat consumption,
This is based on a total heat consumption control method for air conditioning equipment in which the amount of heat is controlled such that it increases by a predetermined value (Δy) when cold water is used, and decreases by a predetermined value (Δy) when hot water is used.

(Function) According to the above configuration, a water valve is provided for each air conditioner to control the amount of water sent (and amount of heat consumed). Therefore, even when the total demand for heating and cooling is suppressed, uniform air conditioning can be performed without causing variations in temperature among the air conditioning equipment.

(Example) Fig. 1 shows an air conditioning system according to the present invention, where 1o is a cold water/hot water source, 12a, 12b, 12c are air conditioning equipment, 14a,
14b.

14c is a water valve provided for each air conditioner, and 18 is a water pipe.

One of the features of the present invention is that a water valve is provided for each air conditioner.

FIG. 2 shows the system configuration of the air conditioning equipment according to the present invention,
Cold water or hot water supply and return water temperature sensors 18a, 18b
, a return water flow rate sensor 2o, a measuring device 22 that periodically measures these, calculates the total amount of heat consumed from the temperature difference between the water supply and return water and the return water flow rate, and outputs it to the controller when this value exceeds a certain value. A processing device 24 that calculates the set value to be used, a set value output device 2B, and a regulator 28 that adjusts the opening degree of the water valve based on the set value and the temperature blown out from the heat exchanger 30 (measured by the temperature sensor 32). configured.

Next, the operation of the system will be explained with reference to FIG.

b) When the system starts operating, the reference value Y is output as a set value to the controller of each air conditioning equipment.

) When cold water is flowing through the heat exchange section of each air conditioner, the total amount of heat consumed exceeds the standard level X of consumed heat by Δx.
A similar output is made to the controllers of other air conditioning equipment, where a set value that is larger by y is output to the controller and the water valve is throttled to reduce the amount of cold water flowing to the heat exchanger.

c) When hot water is flowing through the heat exchange section of each air conditioner, a set value that is reduced by Δy each time Δx is exceeded is output to the controller.

2) Δx′ is due to hunting (due to discontinuous change in set value,
The setting value is Δy even though the total heat consumption does not change
This is a judgment value for preventing the increase in total heat consumption from changing by Δy, and is used to determine whether to lower the set value by Δy (increase by Δy in the case of hot water) when the increased total heat consumption starts to decrease. Generally, Δx' is Δx, and in the embodiment, Δx'<Δx.

(Effects of the Invention) As explained in detail above, according to the present invention, the amount of heat consumed by each air conditioner can be individually controlled, so there is no difference in room temperature and no loss of comfort.

[Brief explanation of the drawing]

Fig. 1 is a simple block diagram of the air conditioning equipment according to the present invention, Fig. 2 is a detailed system configuration diagram of the air conditioning equipment according to the invention,
FIG. 3 is an explanatory diagram of its operation, and FIG. 4 is a block diagram of the conventional air conditioning equipment. 10; cold water/hot water source; 12a, 12b, 12c; air conditioning equipment 14a, 14b, 14c; water pulp; 16; water pipe.

Claims (2)

[Claims] (1) In a system that supplies heat from a cold water/hot water source to multiple air conditioners via water pipes, each air conditioner has a common measuring device that measures the temperature and flow rate of the water being sent and returned, and according to its output. A processing device that calculates the total amount of heat consumed and generates an output when the value exceeds a predetermined value, and a set value output device that outputs a set value according to the output, and a water control device that adjusts the amount of water for each air conditioning equipment. A valve and a regulator for adjusting the opening degree of the water valve according to the set value and the output temperature of the air conditioner are provided, and the set value is set to a predetermined value of the total heat consumption (
A total heat consumption control method for air conditioning equipment, characterized in that the total heat consumption of an air conditioner is controlled so that the amount of heat consumed increases by a predetermined value (Δy) for cold water and decreases by a predetermined value (Δy) for hot water each time Δx) increases. (2) The increment in the total heat consumption corresponding to the increment (Δy) in the set value is determined such that the value (Δx') when the increment is negative is different from the value (Δx) when the increment is positive. 2. A total heat consumption control method for air conditioning equipment according to claim 1, characterized in that hunting is prevented.