KR101198313B1 - Air conditioning controller and air conditioning control system using the same - Google Patents

Abstract

The air conditioning control system 1 includes an air conditioner 10 having an air cooling coil 11 for cooling outside air and a ventilation cooling coil 12 for cooling ventilation in the room, and each coil 11 of the air conditioner 10. And a central heat source device 40 for supplying cold water to the air conditioner 12 and an air conditioner for calculating a set value of the air conditioner 10 such that all required energy consumption in the air conditioning control system 1 is minimized within a range of a predetermined comfort index. The holiday control device 50 is provided.

Description

Air-conditioning control device and air-conditioning control system using the same {AIR CONDITIONING CONTROLLER AND AIR CONDITIONING CONTROL SYSTEM USING THE SAME}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioning control device for controlling air conditioning of an office or a residence, and an air conditioning control system using the same.

The energy consumed in the entire building, such as offices and houses, is about half of energy related to air conditioning. Therefore, the promotion of energy saving related to the air conditioning control greatly contributes to the energy saving of the whole building equipment.

In view of this, Patent Literature 1 discloses a technique using an air conditioning system that performs an air conditioning operation for optimal energy saving in a building facility.

The technique of this patent document 1 includes the energy consumption of the heat source machine which produces cold / hot water, the energy consumption of the fan which sends out the heat exchanged by the air conditioning coil, and the energy consumption of the pump which sends cold / hot water from the heat source machine. The energy-saving air conditioning operation can be efficiently performed by obtaining the coil temperature target value of the air conditioning coil and the cold / hot water temperature target value of the heat source unit so that the required air conditioning consumption energy is minimized.

Japanese Patent Application Laid-Open No. 2004-69134

While energy saving is being promoted in this way, in order to satisfy the thermal sensation of the occupants in the room that is the object of air conditioning control, so-called comfort is required. However, this "promotion of energy saving" and "guaranteed comfort of occupants" are in a trade off relationship. In other words, if energy conservation is promoted, the comfort of occupants is often lowered.

However, it is possible to suppress unnecessary energy consumption by suppressing excessive energy consumption beyond the comfort range of the occupants.

Accordingly, the present invention has been made in view of the above circumstances, and an object of the present invention is to provide an air conditioning control device and an air conditioning control system using the same, which can efficiently reduce energy consumption while considering comfort of occupants. .

In order to achieve the above object, the air conditioning control device of the present invention is an air conditioner having a ventilation coil and a blowing fan for supplying air to a room or a control zone of the air conditioning control object. In the air conditioning control system which consists of a heat source control system which consists of a heat source apparatus which supplies cold water or hot water to the said air conditioner, The temperature measurement value and the humidity measurement value of the indoor or the control zone of the said air conditioning control object are measured. A measurement value acquiring unit for acquiring a signal, a PMV range storage unit for storing a target setting range of a predicted mean vote (PMV), the temperature measurement value of the indoor or the control zone of the air conditioning control target, and the humidity When the measured value and the PMV value calculated by the predetermined wind speed value are within the target setting range, at least the heat source device, a ventilation coil of the air conditioner, and a blowing fan. The temperature and humidity of the air supplied from the air conditioner are calculated so that the total value of the energy consumption in one air conditioning control system is minimum, and when the calculated PMV value exceeds the target setting range, An air conditioner set value calculator to change, a set value transmitter for transmitting a set value of the blower fan to the air conditioner so as to be the predetermined wind speed value or a wind speed value after the change, and a temperature and humidity calculated by the air conditioner set value calculator And a control value transmitter for calculating the water temperature set value or the flow rate value of the cold water or hot water and transmitting the same to the heat source device.

Moreover, the air conditioning control system of this invention is an air conditioner which has a ventilation coil and the blower fan which supplies a wind to the room of an air conditioning control object, or a control zone of the said room, and the heat source apparatus which supplies cold water or hot water to the said air conditioner. And an air conditioning control system configured to control the operation of these air conditioners and the heat source device, wherein the air conditioning control device is configured to adjust the temperature measurement value and the humidity measurement value of the indoor or target control zone of the air conditioning control object. The measured value acquisition part to acquire, the PMV range memory | storage part which memorize | stores the target setting range of PMV, the said temperature measured value, the said humidity measured value, and predetermined | prescribed of the indoor or said control zone of the said air conditioning control object, and When the PMV value calculated by the wind speed value is within the target setting range, at least the heat source device, the ventilation coil of the air conditioner, and the blowing fan. The temperature and humidity of the air supplied from the air conditioner are calculated so that the total value of the energy consumption in the air conditioning control system is minimized, and when the calculated PMV value exceeds the target setting range, An air conditioner set value calculator to change, a set value transmitter for transmitting a set value of the blower fan to the air conditioner so as to be the predetermined wind speed value or a wind speed value after the change, and a temperature and humidity calculated by the air conditioner set value calculator And a control value transmitter for calculating the water temperature set value or the flow rate value of the cold water or hot water and transmitting the same to the heat source device.

According to the air conditioning control device of the present invention and the air conditioning control system using the same, it is possible to efficiently reduce energy consumption while considering comfort of the occupants.

BRIEF DESCRIPTION OF THE DRAWINGS The whole figure which shows the structure of the air conditioning control system by 1st-5th embodiment of this invention.
It is a block diagram which shows the detailed structure of the air conditioning control system by 1st embodiment-3rd embodiment of this invention.
3 is a flowchart showing the operation of the air conditioning control system according to the first to fifth embodiments of the present invention.
Fig. 4 is a graph showing the relationship between room temperature and room humidity when the PMV value used in the air conditioning control system according to the first to fifth embodiments of the present invention is judged comfortably.
Fig. 5 is a damper opening diagram for supplying air to the coil 11 for external air cooling, the coil 12 for ventilation cooling, and the blowing fan 13 in the air conditioning control system according to the third embodiment of the present invention. The graph which shows the change by the amount of external air blown in.
6 is a configuration diagram showing a detailed configuration of an air conditioning control system according to a fourth embodiment of the present invention.
7 is a configuration diagram showing a detailed configuration of an air conditioner of an air conditioning control system according to a fifth embodiment of the present invention.
FIG. 8 is a conceptual diagram showing a flow path of cold water flowing through the air cooling coil and the ventilation cooling coil of the air conditioner according to the fifth embodiment of the present invention. FIG.

EMBODIMENT OF THE INVENTION Embodiment of the air conditioning control system of this invention is described with reference to drawings. In recent years, many office buildings and the like have good thermal insulation properties, and many PCs and OA devices often provide cooling mode throughout the year. Therefore, in each following embodiment, the case where air-conditioning control is mainly performed in a cooling mode is demonstrated.

<< first embodiment >>

<Configuration of the air conditioning control system according to the first embodiment>

The overall view of the air conditioning control system 1 which concerns on 1st Embodiment of this invention is shown in FIG.

In the case of a large building, since the room is large, the room is divided into a plurality of control zones, and a plurality of air conditioners are provided in a machine room near the room, corresponding to each control zone. Even in this case, hereinafter, each control zone will also be referred to as indoor for simplicity.

The air conditioning control system 1 is for controlling air conditioning in the building A to be subjected to air conditioning. The air conditioning control system 1 includes an air conditioner 10 installed in each room in the building A, a temperature sensor 20 installed in each room to measure room temperature and transmit measured values to each air conditioner 10, Humidity sensor 30 installed in each room, the central heat source device 40 which manages the cold water supplied to each air conditioner 10, and each air conditioner 10 to measure indoor humidity, and transmit a measured value to each air conditioner. The air conditioning holiday control device 50 as an air conditioning control device which receives the room temperature measured value and the measured value of the humidity of the room, and controls the operation | movement of the central heat source apparatus 40 and each air conditioner 10 is provided.

Each air conditioner 10 acquires the measured value from the temperature sensor 20 and the humidity sensor 30, and transmits the measured value to the air conditioning consecutive holidays control device 50. As shown in FIG. In addition, as shown in FIG. 2, each air conditioner 10 is provided from the coil 11 for external air cooling which dehumidifies and cools external air using the cold water supplied from the central heat source apparatus 40, and the central heat source apparatus 40. As shown in FIG. Ventilation cooling coil 12 for cooling sensible heat generated from lighting of indoor ventilation, OA equipment, human body, etc. using the supplied cold water, and external air and ventilation cooled by coil for air cooling 11 The blowing fan 13 which blows air which mixed the ventilation cooled by the cooling coil 12 to each room is provided.

The central heat source device 40 includes a freezer 41 that generates cold water, a cooling tower 42 that cools the freezer 41 by air to reuse the water whose temperature has risen, the freezer 41, and each air conditioner ( 10) or a water feed pump 43 for conveying cold water between the cooling towers 42.

The air conditioning holiday control device 50 acquires measured values of the temperature sensor 20 and the humidity sensor 30 transmitted from each air conditioner 10. Then, the air conditioning holiday control device 50 is outside the air conditioner 10 of the cooling tower 42, the refrigerator 41, the water pump 43, and the air conditioner 10 of the central heat source device 40 within the range of a predetermined comfort index. The optimal room temperature setting value and humidity setting value of each room are computed so that the total value of the energy consumption of the cooling coil 11, the ventilation cooling coil 12, and the blowing fan 13 may be minimum. In addition, the air conditioning holiday control device 50 transmits the calculation result to each air conditioner 10 and the central heat source device 40.

<Operation of the air conditioning control system according to the first embodiment>

The operation of the air conditioning control system 1 according to the first embodiment will be described with reference to the flowchart of FIG. 3.

First, air conditioning control in the building A is started. Then, each temperature sensor 20 measures the temperature of each room, and each humidity sensor 30 measures the humidity of each room. And the measured value of the temperature and humidity of each chamber is transmitted to the air conditioner 10 with which each room was equipped (S1).

After these measured values are received by each air conditioner 10, they are further transmitted from the air conditioner 10 to the air conditioning holiday control apparatus 50 (S2).

From the received measurement values, the air conditioning holiday control device 50 includes a cooling tower 42 of the central heat source device 40 that has a PMV (Predicted Mean Vote) within a comfortable range and which is all required energy consumption. In order that the total value of the energy consumption by the coil 11 for external air cooling, the coil 12 for ventilation cooling, and the blower fan 13 of the refrigerator 41, the water pump 43, and the air conditioner 10 becomes the minimum, The optimum room temperature set value and humidity set value of each room are calculated (S3).

Here, PMV used for calculation of each value is demonstrated.

PMV is a variable that affects a human's sense of warmth to heat and cold, including (a) air temperature, (b) relative humidity, (c) average radiation temperature, (d) airflow velocity, and (e) activity Is a comfort index obtained from six variables, i.e., internal calorific value) and (f) the amount of wear.

The calorific value of a human being is represented by the sum of the radiation amount by convection, the heat radiation by radiation, the heat of evaporation from humans, the heat radiation by respiration, and the heat storage heat. When the calorific value is in the thermal equilibrium state, the human body is thermally neutral. Therefore, the room becomes a comfortable state which is neither hot nor cold for the human body. On the contrary, when the calorific value deviates from the thermal equilibrium, the human body feels heat or cold.

Professor Fanger of the Danish Institute of Technology announced the derivation of the comfort equation in 1967. Using this as a starting point, statistical analysis was conducted from a plurality of subjects' questionnaire, and PMV was proposed by combining the heat load of the human body and the warmth and coldness of the human body. This PMV was adopted as an ISO standard in 1994 and has recently become well used.

PMV which is index of warmth and coolness is numerical by seven phases of evaluation scales,

+3: hot,

+2: warm,

+1: slightly warm,

0: Either way, comfortable,

-1: slightly cool,

-2: cool,

-3: cold,

It is represented as In addition, the comfortable human PMV ranges from -0.5 to +0.5.

The unit of met (meth) is used for the activity amount which shows work intensity | strength among said six variables, and the unit of clo (clo) is used for the amount of wear.

The unit met represents the metabolic rate and is a value based on metabolism at rest in a thermally comfortable state. Here, 1 mett is represented by following formula (1).

(Number 1)

In addition, unit clo represents the thermal insulation of a garment, and 1 clo is metabolism whose heat dissipation amount from the surface of a body is 1 met in the room temperature of 21 degreeC, 50% of a relative humidity, and 5 cm / s of airflows or less. It is the value in the state of wearing in equilibrium with. This is represented by the following formula (2) when converted into a normal heat resistance value.

(Number 2)

Next, the calculation formula of PMV value is shown to following formula (3).

[Number 3]

Here, M: activity amount [kcal / h], A: human body surface area [m 2], L: human body heat load [kcal / m 2h] (calculated by Faner's comfort equation). Using this equation (3), within the comfortable range (-0.5 <PMV <+0.5), the PMV value on the hotter side for cooling, and the PMV value on the colder side for heating, respectively, are PMV target values. Set. This reduces the air conditioning load and achieves energy saving.

Next, calculation of the optimal setting value of the air conditioner 10 is demonstrated.

As described above, all the energy consumed in the air conditioning control system 1 cools the outside air of the cooling tower 42, the refrigerator 41, the water pump 43, and the air conditioner 10 of the central heat source device 40. It is a total value of each energy consumption of the coil 11 for ventilation, the coil 12 for ventilation cooling, and the blowing fan 13.

And as an algorithm which calculates the setting value of the air conditioner 10 so that all the energy consumption consumed in the air conditioning control system 1 may be minimum, there exists a method as described in Unexamined-Japanese-Patent No. 2008-232507 specification. This method estimates the physical quantities such as the amount of state necessary for air conditioning optimization, for example, the amount of heat generated in the room, the amount of steam generated in the room, the product of the total heat transfer coefficient of the heat exchanger and the heat transfer area, from the measured values of various sensors used for air conditioning control. This enables optimum control over the whole air conditioning system. As another algorithm, there is a method as described in Japanese Patent Laid-Open No. 2008-256258. This technique, at an early stage, calculates a potential total air conditioning load from the heat exchange amount between the developing heat source and the cold water coil. And based on this total air conditioning load as a variable, the air conditioning apparatus of an air conditioning system is controlled based on the optimal operation state quantity of an air conditioning system. Then, when the air condition of the air conditioning control target space substantially matches the set air conditioning conditions, the true total air conditioning load is calculated, and the optimum operating state amount is determined. As a result, air conditioning is operated efficiently, and energy saving of an air conditioning system is realized.

In the first embodiment, as described above, the optimum set value of the air conditioner 10 is set so that all the energy consumption in the air conditioning control system 1 is minimized within a range of -0.5 to +0.5 where the PMV value is a comfortable range. The calculated value is transmitted to the air conditioner 10 and the central heat source device 40 (S3).

When the optimum set value of the air conditioner 10 is acquired by the central heat source device 40, the cold water required for the air conditioner 10 is supplied based on this set value (S4). As a result, the air adjusted in consideration of the comfort of the occupants is supplied to the room of the air conditioning control target (S5).

Here, the operation of the air conditioner 10 when the adjusted air is supplied to the room of the air conditioning control object will be described.

When air conditioning is performed by the air conditioning control system, a function of dehumidifying and cooling fresh air blown into the building for the occupants (latent heat cooling load), and cooling of sensible heat generated from lighting inside the building, OA equipment, and the human body. Two types of sensible cooling loads are implemented in the air conditioner.

When cooling by the conventional air conditioner, the said 2 functions were performed simultaneously by mixing air and ventilation. However, in this case, it is mainly outside air that needs dehumidification. For this reason, the temperature and flow volume of the required cold water differ in each function. Therefore, it is more efficient to execute these two functions separately.

Therefore, as shown in FIG. 2, in 1st Embodiment, the coil 11 for external air cooling which dehumidifies and cools outside air, and the coil 12 for ventilation cooling which cools ventilation are provided separately. And cold water of temperature and flow volume suitable for each control is supplied.

According to the first embodiment described above, the comfort of the occupants is considered, and the ventilation between the outside and the room is adjusted individually, and the energy consumption in the system is controlled to be the minimum. Therefore, it becomes possible to perform the air conditioning control which aimed at saving energy of energy consumption efficiently.

<< second embodiment >>

<Configuration of Air Conditioning Control System by Second Embodiment>

The configuration of the air conditioning control system 2 according to the second embodiment of the present invention is the same as that of the first embodiment shown in FIGS. 1 and 2. Therefore, detailed description of the configuration of the second embodiment is omitted.

<Operation of the air conditioning control system according to the second embodiment>

The operation of the air conditioning control system 2 in the second embodiment is the same as that in the first embodiment except for the calculation of the set values of the air conditioners 10 in step S3 of FIG. 3. Therefore, detailed description of the same parts as in the first embodiment is omitted.

In the second embodiment, in step S3 of FIG. 3, the air conditioning holiday control device 50 calculates the set value of each air conditioner 10 such that the PMV is required to have the minimum required energy consumption within a comfortable range. Explain.

Assuming that an office building is shown in FIG. 4, when the indoor wind speed is 0.1 m / s, the relationship between the room temperature which becomes comfortable 0.3 to 0.5 by energy saving at the time of cooling, and room humidity is shown. In FIG. 4, PMV value 0.3-0.5 is shown (humidity was limited to 20%-80%) in the state of room temperature of room A and the humidity of a room enclosed by a thick line.

On the other hand, in order to reduce greenhouse gas, it is recommended by the government in Japan to set the temperature of summer air conditioner to 28 degreeC.

In this case, however, as can be seen from FIG. 4, even if the humidity is lowered at room temperature of 28 ° C, the PMV value becomes larger than +0.5, the upper limit of the comfortable range in humans.

However, if the wind speed in the room is 0.5 m / s, the humidity is 40% and the PMV is +0.5 or less (about 0.43) even at room temperature of 28 ° C.

Therefore, in the second embodiment, the room with the shaking wind is controlled from the air blowing portion of the air conditioner 10 so that the maximum wind speed is 0.5 m / s at a distance of about 1 m from the floor which is the center position of the human height. Set to feed

Since the wind supplied is shaken wind, the average wind speed can be set to be smaller than 0.5 m / s. For this reason, even if the room temperature setting is 28 degreeC, comfortable air-conditioning control can be provided to the occupants without largely increasing the energy consumption of the blowing fan 13.

According to the above second embodiment, the optimum set value of the air conditioner 10 is calculated in consideration of the wind speed blown from the air conditioner 10. For this reason, it becomes possible to perform the air conditioning control which aimed at saving energy and maintaining comfort comfortably more efficiently.

<< third embodiment >>

<Configuration of the air conditioning control system according to the third embodiment>

In the configuration of the air conditioning control system 3 according to the third embodiment of the present invention, at least one of a carbon dioxide sensor (not shown) or a human body sensor (not shown) is provided in an interior of the air conditioning control object. . The other structure is the same as that of 1st Embodiment shown in FIG. Therefore, detailed description of the same parts as in the first embodiment is omitted.

The carbon dioxide sensor measures the concentration of carbon dioxide in the room discharged from the occupant and transmits it to the air conditioner 10. In addition, the human body detecting sensor detects the number of occupants in the room subject to air conditioning control and transmits the same to the air conditioner 10.

<Operation of the air conditioning control system according to the third embodiment>

The operation of the air conditioning control system 3 according to the third embodiment will be described with reference to FIG. 3.

First, air conditioning control in the building A is started. Then, each temperature sensor 20 measures the temperature of the room, and each humidity sensor 30 measures the humidity of the room. In addition, the carbon dioxide sensor measures the concentration of carbon dioxide in the room, or the human body sensor detects the number of occupants. The measured value measured by each sensor is transmitted to the air conditioner 10 of each room (S1).

Each air conditioner 10 receives the measured value transmitted from each sensor, and transmits it to the air-conditioning holiday control apparatus 50 (S2).

In 3rd Embodiment, the process at the time of calculating the optimal setting value of each air conditioner 10 by the air conditioning holiday control apparatus 50 is demonstrated so that required consumption energy may be minimum in a comfortable range of PMV.

In the air conditioning holiday control apparatus 50 of 3rd Embodiment, the damper for supplying air to the coil 11 for external cooling, the coil 12 for ventilation cooling, and the blowing fan 13 according to the graph shown in FIG. Opening degree is controlled.

As shown in FIG. 5, at the time of air conditioning start (a), all the dampers to the coil 12 for ventilation cooling open, and all the dampers to the coil 11 for external air cooling are closed. Therefore, the exhaust of the indoor air to the outside air is not performed. Then, after a certain time, the exhaust to the room is started. Then, in the minimum outside air time (b) to the middle outside air time (c) to the maximum outside air time (d) so that all the energy consumption of each apparatus is minimum by the temperature, humidity of the outside air, and the temperature and humidity of the ventilation. The viewpoint is selected, and each damper opening degree is controlled.

When a point in time between the minimum outside air time (b) to the middle outside air time (c) to the maximum outside air time (d) is selected, when the room needs to be cooled, the enthalpy of the outside air is lower than the enthalpy of the room, When the outside air is blown effectively, the damper opening degree is controlled to actively introduce the outside air. For this reason, the usage-amount of cold water supplied to the ventilation cooling coil 12 is reduced.

Here, when the load of the coil 11 for external air cooling is larger than a fixed value, each damper opening degree is controlled according to FIG. At this time, the set value of each device is calculated in consideration of the measured value acquired from the carbon dioxide sensor or the human body sensor.

Specifically, when the carbon dioxide concentration is higher than a certain concentration, or when the occupant becomes a certain number of people or more, the damper opening degree is controlled so as to blow the minimum outside air in order to lower the carbon dioxide concentration below the predetermined concentration, so that the carbon dioxide concentration is ventilated. Lowered by (iii) In this way, the load of the coil 11 for external air cooling does not become excessive, and ventilation is performed.

Thus, when setting the set value of each air conditioner 10 so that the required energy consumption of each device is minimum, it is controlled by the use of outside air cooling and the minimum outside air blowing based on the indoor carbon dioxide concentration or the number of people occupied ( S3). Based on this set value, the central heat source device 40 supplies the cold water required to the air conditioner 10 (S4). As a result, the air adjusted in consideration of the comfort of the occupants is supplied to the room of the air conditioning control target (S5).

According to the third embodiment described above, the optimum set value of the air conditioner is calculated in consideration of the use of outside air cooling and the intake of outside air based on the concentration of carbon dioxide in the room or the number of occupants. Therefore, it becomes possible to perform the air conditioning control which aimed at saving energy of energy consumption more efficiently.

<< fourth embodiment >>

<Configuration of the air conditioning control system according to the fourth embodiment>

In the structure of the air conditioning control system 4 which concerns on 4th Embodiment of this invention, as shown in FIG. 6, the heat source apparatus of two systems of the center heat source apparatus 40 and the 2nd center heat source apparatus 40 'is provided. do. The other structure is the same as that of 1st Embodiment. Therefore, detailed description of the same parts as in the first embodiment is omitted.

In the fourth embodiment, the central heat source device 40 supplies cold water to the coil 11 for external air cooling, and the second central heat source device 40 'supplies cold water to the coil 12 for ventilation cooling.

<Operation of the air conditioning control system according to the fourth embodiment>

The operation of the air conditioning control system 4 according to the fourth embodiment is the same as that of the first embodiment except for the process at the time of supplying the cold water in step S5 of FIG. 3. Therefore, detailed description of the same parts as in the first embodiment is omitted.

In 4th Embodiment, when cold water is supplied to each air conditioner 10 in step S6, the central heat source apparatus 40 supplies cold water to the coil 11 for external air cooling, and is independent system from the central heat source apparatus 40. In FIG. The second central heat source device 40 'supplies cold water to the coil 12 for ventilation cooling.

In the conventional air conditioning control system, the cold water supplied by the central heat source device to the cooling coil is about 7 ° C. However, this 7 degreeC cold water is required only when dehumidifying and cooling outside air. On the other hand, when cooling the ventilation of the indoors of an air conditioning control object, the temperature of cold water is enough about 13 degreeC. The amount of energy (latent heat cooling load) required when the outside air is dehumidified and cooled is about 30 to 20% of the total amount of energy required for air conditioning control of cooling. Therefore, the amount of energy (sensible cooling load) required when cooling the ventilation corresponding to 70 to 80% of the total amount of energy is used to cool the cold water excessively. Therefore, waste of energy is generated.

Thus, in the fourth embodiment, two of the central heat source device 40 for supplying cold water to the coil 11 for external air cooling and the second central heat source device 40 'for supplying cold water to the coil 12 for ventilation cooling are provided. A system cold water source is installed. The cold water supplied by the central heat source device 40 to the coil 11 for external air cooling is adjusted to about 7 ° C. On the other hand, the cold water supplied to the coil 12 for ventilation cooling by the 2nd central heat source device 40 'is set so that it may be adjusted around 13 degreeC.

According to the above fourth embodiment, the central heat source device 40 and the central heat source device 40 'of two systems are provided. As a result, waste of energy due to excessive adjustment of cold water to low temperature can be omitted. Therefore, it becomes possible to perform the air conditioning control which aimed at saving energy of energy consumption more efficiently.

<< fifth embodiment >>

<Configuration of the air conditioning control system according to the fifth embodiment>

The configuration of the air conditioning control system 5 according to the fifth embodiment of the present invention is the same as the configuration of the air conditioning control system 1 according to the first embodiment shown in FIG. 1. However, the air cooling coil 11 is connected in series with the ventilation cooling coil 12 and each air conditioner 10.

Each air conditioner 10 is equipped with several valve as shown in FIG. The 1st valve 14 adjusts the quantity of cold water blown in from the central heat source apparatus 40 to the coil 11 for external air cooling by opening degree. The second valve 15 adjusts the amount of cold water blown into the ventilation cooling coil 12 after being used in the external air cooling coil 11. The third valve 16 is connected in parallel with the coil for ventilation cooling 12, and after being used by the coil 11 for outside air cooling, it adjusts the quantity of cold water drained directly. The 4th valve 17 is connected in parallel with the coil 11 for external air cooling, and is connected so that the valve 15 and the valve 16 may be upstream from these in series, and from the central heat source apparatus 40 The amount of cold water blown directly into the ventilation cooling coil 12 is adjusted.

<Operation of the air conditioning control system according to the fifth embodiment>

The operation of the air conditioning control system 5 in the fifth embodiment is the same as that of the first embodiment except for the process when cold water is supplied in step S5 of FIG. 3. Therefore, detailed description of the same parts as in the first embodiment is omitted.

In 5th Embodiment, when cold water is supplied to each air conditioner 10 in step S5, cold water of 7 degreeC is supplied to the coil 11 for external air cooling from the central heat source apparatus 40 first. The cold water after being used in the coil 11 for external air cooling is reused in the coil 12 for ventilation cooling. As described in the fourth embodiment, the cold water used in the ventilation cooling coil 12 need not be as low as the cold water used in the ambient air cooling coil 11. Therefore, the cold water used in the ventilation cooling coil 12 can cope with reuse of the cold water after being used in the air cooling coil 11.

At this time, the amount of cold water supplied from the central heat source device 40 to the coil 11 for external air cooling is adjusted by the opening degree of the valve 14. In addition, the amount of cold water supplied to the ventilation cooling coil 12 after being used in the outside air cooling coil 11 is adjusted by the opening degree of the valve 15 and the valve 16. In addition, when the quantity of cold water used by the ventilation cooling coil 12 is not enough with the cold water after using the coil 11 for external cooling, by opening the valve 17, the cold water is ventilated from the central heat source device 40. It is supplied directly to the cooling coil 12.

8A shows the flow of cold water when all of the cold water used in the air cooling coil 11 is supplied to the ventilation cooling coil 12 by allowing the valve 14 and the valve 15 to be opened to the same extent. Is indicated by a thick line. FIG. 8B shows that the valve 14, the valve 15, and the valve 16 are opened so that a part of the cold water used in the air cooling coil 11 is supplied to the ventilation cooling coil 12. At the same time, a thick line shows the flow of cold water when unnecessary cold water is drained without passing through the ventilation cooling coil 12. FIG. 8C shows that the valve 14, the valve 15, and the valve 17 are opened, so that the cold water used in the air cooling coil 11 and the cold water from the central heat source device 40 are ventilated and cooled. The flow of cold water when supplied to the coil 12 for use is shown by a thick line.

According to the fifth embodiment described above, the air cooling coil 11 is connected to the ventilation cooling coil 12 in a series state. With such a configuration, it is possible to reuse the cold water used in the coil 11 for outside air cooling in the coil 12 for ventilation cooling. Therefore, it becomes possible to perform the air conditioning control which aimed at saving energy of energy consumption more efficiently.

In addition, in said 1st Embodiment-5th Embodiment, the case where the central heat source apparatus 40 was provided in the building A of air conditioning control object was demonstrated. However, when the refrigerator 41 and the cooling tower 42 of the central heat source device 40 are not present in each building and air conditioning control is performed by DHC (District Heating and Cooling), cold and hot water is supplied from the outside. (However, the water pump 43 to send the cold and hot water to each air conditioner is in the building). In this case, all of the energy consumption in the air conditioning control system is the sum of the energy consumptions of the water pump, the coil for external cooling, the coil for ventilation cooling, and the blowing fan.

In addition, in said 1st Embodiment-5th Embodiment, the case where each measured value measured by each sensor is transmitted from each sensor to the air conditioning holiday control device 50 via the air conditioner 30 was demonstrated. However, the present invention is not limited thereto, and each measured value may be transmitted to the air conditioning holiday control device 50 directly from each sensor.

In addition, in said 1st Embodiment-5th Embodiment, PMV value was used as a comfort index of a human thermal sense. However, it is not limited to this, You may perform air conditioning control using a standard effective temperature, a new effective temperature, etc.

In addition, you may implement each embodiment in combination as much as possible. By combining each embodiment, a higher effect can be obtained.

Industrial availability

According to the air conditioning control system of the present invention, excessive energy consumption beyond the comfort range of occupants can be suppressed while considering comfort of occupants in large buildings and the like, and energy saving of energy consumption can be efficiently achieved.

Claims (8)

An air conditioner having a ventilation coil, a ventilation fan for supplying air to a room or an indoor control zone of the air conditioning control object, and a heat source for supplying cold water or hot water to the air conditioner. In the air conditioning control device used in the air conditioning control system consisting of the device,
A measured value acquiring unit for acquiring a temperature measured value and a humidity measured value of the indoor or the indoor control zone of the air conditioning control object;
PMV range storage unit for storing the target setting range of PMV (Predicted Mean Vote),
At least the heat source device when the temperature measurement value, the humidity measurement value, and the PMV value calculated by a predetermined wind speed value of the indoor air conditioning control target room or the indoor control zone are within the target setting range; The temperature and humidity of the air supplied from the air conditioner are calculated so that the total value of the energy consumption in the air conditioning control system including the ventilation coil of the air conditioner and the blower fan is minimized, and the PMV value calculated is the target setting range. When exceeding, the air conditioner setting value calculating unit for changing the wind speed value,
A set value transmitter for transmitting the set value of the blower fan to the air conditioner so as to be the predetermined wind speed value or the wind speed value after the change;
And a control value transmitter for calculating the water temperature set value or the flow rate value of the cold or hot water from the temperature and humidity calculated by the air conditioner set value calculator. The method of claim 1,
The air conditioner further has a coil for outside air,
The air conditioner set value calculator includes energy consumption in an air conditioning control system including a heat pump, a ventilation coil of the air conditioner, an external coil, a blower fan, and a water pump to supply cold water or hot water to the air conditioner from the heat source device. And said temperature and humidity are calculated so that the total value of is minimum. The method of claim 2,
The measured value acquisition unit further acquires the measured value of the CO ₂ concentration of the indoor or indoor control zone of the air conditioning control target, or the measured number of occupants of the occupant,
The air conditioner set value calculating unit increases the blowing amount of the outside air when cooling is required by the air conditioner and the enthalpy of the outside air is lower than the enthalpy of the room within the target setting range, and the load of the coil for outside air is a predetermined value. When the measured value of the CO ₂ concentration obtained by the measured value acquisition unit is higher than the preset CO ₂ concentration limit value or the number of people occupied by the occupant is higher than the predetermined value, the CO ₂ concentration of the room is determined by the CO The air volume setting value for taking in the minimum amount of outside air to lower than ₂ concentration thresholds by the said coil for outside air is further computed,
And the set value transmitter transmits the outside air amount set value calculated by the air conditioner set value calculator to the air conditioner. An air conditioner having a ventilation coil, a blower fan for supplying air to a room or a control zone of the air conditioning control object, and a water pump for sending cold water or hot water supplied from outside related to local air conditioning to the air conditioner. In the air conditioning control device used in the air conditioning control system having,
A measured value acquiring unit for acquiring a temperature measured value and a humidity measured value of the indoor or the indoor control zone of the air conditioning control object;
A PMV range storage unit for storing the PMV target setting range;
At least for ventilation of the air conditioner when the temperature measurement value, the humidity measurement value, and the PMV value calculated by the predetermined wind speed value of the indoor control target room or the indoor control zone are within the target setting range. The temperature and humidity of the air supplied from the air conditioner are calculated so that the total value of energy consumption in the air conditioning control system including the coil, the blowing fan, and the water pump is minimized, and the PMV value calculated is the target setting range. An air conditioner set value calculating unit for changing the wind speed value when exceeding;
A set value transmitter for transmitting the set value of the blower fan to the air conditioner so as to be the predetermined wind speed value or the wind speed value after the change;
And a control value transmission unit for calculating a flow rate value of the cold water or hot water from the temperature and humidity calculated by the air conditioner set value calculating unit and transmitting the calculated flow rate value to the water pump. An air conditioner having a ventilation coil and a blower fan for supplying air to a room or a control zone of the air conditioning control object, a heat source device for supplying cold water or hot water to the air conditioner, and operations of the air conditioner and the heat source device. In the air conditioning control system which consists of an air conditioning control apparatus to control,
The air conditioning control device,
A measured value acquiring unit for acquiring a temperature measured value and a humidity measured value of the indoor or the indoor control zone of the air conditioning control object;
A PMV range storage unit for storing the PMV target setting range;
At least the heat source device when the temperature measurement value, the humidity measurement value, and the PMV value calculated by a predetermined wind speed value of the indoor air conditioning control target room or the indoor control zone are within the target setting range; The temperature and humidity of the air supplied from the air conditioner are calculated so that the total value of the energy consumption in the air conditioning control system including the ventilation coil of the air conditioner and the blower fan is minimized, and the PMV value calculated is the target setting range. When exceeding, the air conditioner setting value calculating unit for changing the wind speed value,
A set value transmitter for transmitting the set value of the blower fan to the air conditioner so as to be the predetermined wind speed value or the wind speed value after the change;
And a control value transmitter for calculating the water temperature set value or the flow rate value of the cold or hot water from the temperature and humidity calculated by the air conditioner set value calculator. The method of claim 5, wherein
The air conditioner further has a coil for outside air,
The air conditioner set value calculator includes energy consumption in an air conditioning control system including a heat pump, a ventilation coil of the air conditioner, an external coil, a blower fan, and a water pump to supply cold water or hot water to the air conditioner from the heat source device. And the temperature and humidity are calculated so that the total value of is minimized. The method according to claim 6,
The heat source device is installed in two systems,
One heat source device supplies cold water or hot water to the coil for outside air, and the other heat source device supplies cold water or hot water to the coil for ventilation. The method according to claim 6,
The outside coil and the ventilation coil are connected in series;
In the ventilation coil, cold water or hot water used in the outside air coil is reused.

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