JPH067021B2 - Total heat consumption controller for air conditioning equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to an air conditioner that uses cold water and hot water for cooling and heating in a building, and is provided as an individual device for suppressing the total demand of cooling and heating heat quantity peaks such as midsummer and midwinter. The present invention relates to a total heat consumption control device that equalizes the suppression of demand for air conditioning equipment.

[Prior Art] Fig. 4 shows a conventional air conditioning equipment. The cold / hot water source 10 for supplying cold water or hot water at a time includes a plurality of air conditioners 12a, 1a.
Water is supplied to 2b and 12c via the pipe 16, and the suppression control of the water supply amount is collectively performed by squeezing the valve 14.

[Problems to be Solved by the Invention] As described above, according to the conventional technology, when the total demand of the heating / cooling heat amount peak is suppressed in midsummer, midwinter, etc., the valve 14 is throttled to perform collective suppression control at the water source. For this reason, cold water or hot water easily flows into the air conditioning equipment with the smaller water resistance, and as a result, it is inevitable that the air conditioning temperature varies among the air conditioning equipment.

It is an object of the present invention to provide an excellent total heat consumption control device that can eliminate variations in air conditioning temperature between air conditioning facilities.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention is a total control for controlling the flow rate of cold water / hot water sent from a cold water / hot water source to a plurality of air conditioning facilities via a water supply pipe and a return water pipe. The heat consumption control device
The water supply temperature sensor is installed in the water supply pipe and the return water temperature sensor and the flow rate sensor are installed in the return water pipe so that it is common to all air conditioning equipment, and the measured values from the water supply temperature sensor, return water temperature sensor, and flow rate sensor A set value processing means for calculating the heat consumption and calculating a set value according to the calculated increase or decrease of the total heat consumption is provided, and each air conditioning equipment sheet has a water valve for controlling the flow rate of cold / hot water. A temperature sensor for measuring the blown temperature of the air conditioning equipment and a controller for adjusting the opening of the water valve according to the measured value of the temperature sensor and the set value calculated by the set value processing means are provided. Each time the calculated total heat consumption increases by a predetermined value Δx, the set value processing means increases the set value by a fixed value Δy in the case of cold water and decreases the set value by a fixed value Δy in the case of hot water. Is configured.

[Operation] The set value processing means, for the set value common to each air conditioning equipment,
Each time the calculated total heat consumption increases by a predetermined value Δx, in the case of cold water, the set value is increased by a constant value Δy. Set value is Δy
If it is increased, the water valve of each air conditioner is throttled by that amount, and the flow rate of cold water is uniformly reduced. In the case of hot water, the set value is decreased by a fixed value Δy, so the water valve of each air conditioner is throttled by that amount and the flow rate of hot water is uniformly decreased.

Therefore, when suppressing the total demand of the heating and cooling heat quantity peak,
Each air conditioner will be controlled with a uniform suppression amount proportional to the reduction in total heat consumption.

[Example] FIG. 1 shows an air conditioner according to the present invention, 10 is a cold / hot water source, 12a, 12b and 12c are a plurality of air conditioners,
14a, 14b, and 14c are each air conditioning equipment 12a, 12
Water valves provided for b and 12c, and 16 are a water supply pipe and a return water pipe.

It is an essential requirement of the present invention that a water valve is provided for each of the air conditioners 12a, 12b, and 12c.

FIG. 2 shows the system configuration of the air conditioning equipment according to the present invention. In this system, a water supply pipe is provided with a cold water or hot water supply temperature sensor 18a, a return water pipe 16 is provided with cold water or hot water return water temperature sensor 18b, and a return water pipe 16 is provided.
The total amount of heat consumed is calculated from the return water flow rate sensor 20 provided in, the measuring device 22 that periodically measures these, the temperature difference between the water supply and the return water, and the return water flow rate, and how much this calculated value has increased. From the heat exchange unit 30 measured by the processing device 24 and the set value output device 26 that calculate and output the set value in accordance with whether it is decreased or decreased, and the installed value and the temperature sensor 32 provided for each air conditioning facility. It is mainly configured by a controller 28 that adjusts the opening degree of the water valve 14a based on the blowing temperature.

Next, the operation of the measuring device 22, the processing device 24, and the set value output device 26 corresponding to the set value processing means of the present invention will be described with reference to FIG.

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

(B) When cold water is flowing through the heat exchange section of each air conditioning equipment, the set value is kept constant Δy every time the total heat consumption increases by Δx.
The amount of cold water flowing to the heat exchange part is reduced by increasing the output to the controller and throttling the water valve. This same set value is output to the controller of other air conditioning equipment.

(C) When hot water is flowing through the heat exchange section of each air conditioning facility, the set value is kept constant Δy every time the total heat consumption increases by Δx.
The output reduced by only is output to each controller. This set value is also output to the controller of other air conditioning equipment.

(D) Δx ′ is hunting (the set value is Δy even though the total heat consumption does not change due to the discontinuous change in the set value.
It is a judgment value to prevent the change of the total heat consumption from increase to decrease, and the judgment to decrease the set value by Δy in case of cold water (increase by Δy in case of hot water). Used for. That is, the set value is decreased (cold water) or increased (hot water) by a constant value Δy each time the total heat consumption decreases by Δx ′. Generally, Δx ′ ≠ Δx, and 0 <Δx ′ <Δx in this embodiment.

[Effects of the Invention] As described in detail above, according to the present invention, the calculated total heat consumption is the predetermined value Δ for the set value common to each air conditioning equipment.
Since the set value is increased by a fixed value Δy for cold water and the set value is decreased by a fixed value Δy for hot water each time x, the total consumption is reduced when the total demand for the heating / cooling heat quantity peak is suppressed. Each air conditioning equipment will be controlled with a uniform suppression amount proportional to the desired reduction of heat quantity, so there will be no variation in the temperature control value of each air conditioning equipment and the desired reduction of total heat consumption will be achieved reliably. It becomes possible.

[Brief description of drawings]

FIG. 1 is a schematic block diagram of an air conditioner according to the present invention, FIG.
FIG. 1 is a system configuration diagram of an air conditioning facility according to the present invention, FIG. 3 is an operation explanatory diagram thereof, and FIG. 4 is a schematic block diagram of a conventional air conditioning facility. 10 ... Cold / hot water source, 12a, 12b, 12c ... Air conditioning equipment, 14a, 14b, 14c ... Water valve, 16 ... Water supply pipe and return water pipe, 18a, 18b, 32 ... Temperature sensor, 20 ... Flow rate sensor, 22 ... Measurement Device, 24 ... Processing device, 26 ... Set value output device.

Claims (2)

[Claims] 1. A total heat consumption control device for controlling the flow rate of cold water / hot water sent from a cold water / hot water source to a plurality of air conditioning facilities via a water supply pipe and a return water pipe, which is common to all air conditioning facilities. The water supply temperature sensor is provided in the water supply pipe, the return water temperature sensor and the flow rate sensor are provided in the return water pipe, and the total heat consumption is calculated from the measured values from the water supply temperature sensor, the return water temperature sensor, and the flow rate sensor. A set value processing means for calculating a set value according to the calculated increase or decrease amount of the total heat consumption is provided, and a water valve for controlling the flow rate of cold water / hot water for each air conditioning facility and a blower for the air conditioning facility. A temperature sensor for measuring temperature,
An adjuster for adjusting the opening of the water valve according to the measured value of the temperature sensor and the set value calculated by the set value processing means is provided, and the set value processing means is such that the calculated total heat consumption is a predetermined value Δ.
x Total amount of heat consumed by the air conditioning equipment, which is configured to increase the set value by a constant value Δy for cold water and decrease the set value by a constant value Δy for hot water each time x increases. Control device. 2. The set value processing means increases or decreases the set value by a constant value Δy each time the total heat consumption increases by a predetermined value Δx, and the total heat consumption differs by a predetermined value Δx from the predetermined value Δx.
The total heat consumption controller for air conditioning equipment according to claim 1, wherein the set value is decreased or increased by a constant value Δy each time x'decreases.