WO2006054586A1

WO2006054586A1 - Air conditioning system and method of controlling air conditioning system

Info

Publication number: WO2006054586A1
Application number: PCT/JP2005/021021
Authority: WO
Inventors: Akira Nishiguchi; Hiroshige Kikuchi; Manabu Okuyama; Yasushi Tomita
Original assignee: Hitachi, Ltd.
Priority date: 2004-11-17
Filing date: 2005-11-16
Publication date: 2006-05-26
Also published as: JP4165496B2; JP2006145070A

Abstract

An air conditioning system for keeping an indoor thermal environment comfortable, performing ventilation properly, and reducing energy consumption. The air conditioning system comprises an indoor load air conditioner and an outside-air load air conditioner. An outdoor-air introduction quantity is controlled depending on the number of persons in a room or a CO2 concentration in the room, and the flow rate of indoor air introduced to the outside-air load air conditioner is controlled depending on the loads of both the indoor load air conditioner and the outside-air load air conditioner.

Description

Specification

Air conditioning system and air conditioning system control method

Technical field

TECHNICAL FIELD [0001] The present invention relates to an air conditioning system that performs cooling and heating of an office building or a general house, and particularly relates to an air conditioning system that is suitable for realizing the preservation of the indoor environment and ensuring comfort while saving energy as much as possible. is there.

Background art

[0002] In recent years, with respect to air conditioning in office buildings and general houses, there are increasing demands for ensuring comfort and maintaining the air environment. On the other hand, energy problems on a global scale are becoming more serious every year, and energy conservation in the air conditioning field, which accounts for a large part of energy consumption, has become an important issue. In response to this situation, for example, Patent Document 1 proposes a system that evaluates the indoor environment with the PMV value, which is a comfort index, and controls the set temperature of the air conditioner to realize comfort and energy saving. ing. In addition, Patent Document 2 proposes a means for sensing the oxygen concentration and carbon monoxide concentration in the room and calculating an appropriate ventilation rate to preserve the indoor environment.

Patent Document 1: Japanese Patent Laid-Open No. 5-126380

[0004] Patent Document 2: JP-A-9 112980

Disclosure of the invention

Problems to be solved by the invention

[0005] In the above conventional example! In Patent Document 1, it is said that the set temperature is controlled based on the comfort index such as the indoor temperature, humidity, wind speed, and radiation temperature to realize comfort and energy saving. However, ventilation, which is an important element of the indoor environment, is not considered, and energy conservation including ventilation is mentioned!

[0006] In Patent Document 2, the indoor environment is preserved by sensing the oxygen concentration, carbon monoxide concentration, etc. in the room and performing appropriate ventilation, but the air that adjusts the room temperature, humidity, etc. The total energy conservation including harmony will be taken into account. In addition, it is necessary to install sensors to measure the oxygen concentration and carbon monoxide concentration in the room. There is also a problem that the system becomes expensive.

[0007] The present invention is intended to solve these problems, and is an air-conditioning system that can maintain the indoor thermal environment comfortably and maintain the indoor environment by properly ventilating the system. The purpose is to provide an air conditioning system and a control method for the air conditioning system that can reduce energy consumption.

Means for solving the problem

[0008] In order to achieve the above object, in the present invention, an indoor load air conditioner for processing an indoor air conditioning load, an outside air load air conditioner, and air from outside the room are taken into the outside air load air conditioner. Air flow and a flow path for guiding room air to the suction side flow path of the outside air load air conditioner are provided, flow rate adjusting means for adjusting the amount of outdoor air taken into each flow path, and intake of room air A flow rate adjusting means for adjusting the amount was provided. The invention's effect

[0009] By adopting the above configuration, the amount of air from outside the room to be taken into the outside air load air conditioner is controlled according to the concentration level of carbon dioxide or the like in the room air, to the outside air load air conditioner. The air volume to be taken in is controlled according to the load amount of the indoor load air conditioner and the load amount of the outdoor air load air conditioner, so that the indoor thermal environment is maintained comfortably and the air is properly ventilated for indoor use. It is possible to provide a control method for an air conditioning system and an air conditioning system that can protect the environment and reduce the total energy consumption.

[0010] In addition, the building management system entrance / exit management information and the operating information capabilities of personal computers, etc. also estimate the number of people in the room, and control the amount of outside air intake based on this estimated value, and the load of the indoor load air conditioner The indoor air flow rate to the outside air load air conditioner is controlled according to the load amount of the outside air load air conditioner, so that the indoor thermal environment is maintained comfortably and the indoor environment is maintained by properly ventilating. Therefore, it is possible to provide an air conditioning system and a control method for the air conditioning system that can reduce the total energy consumption and further reduce the cost.

[0011] Furthermore, exhaust air from the room is led to the outdoor unit of the indoor load air conditioner or the air intake port of the outdoor unit of the outdoor air load air conditioner, so that the efficiency of the cycle is improved and the energy is saved. An air conditioning system and a method for controlling the air conditioning system can be provided. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of an air conditioning system and an air conditioning system control method according to the present invention will be described with reference to the drawings.

Example 1

FIG. 1 shows a schematic configuration of an air conditioning system according to an embodiment of the present invention. Reference numeral 1 denotes a room for air conditioning, and includes a plurality of indoor load processing air conditioners (hereinafter referred to as indoor load air conditioners) 2 and an outside air load processing air conditioner (hereinafter referred to as outside air load air conditioners) 4. Each of the indoor load air conditioners 2 has a room air intake port and an air discharge port in the room 1, and is connected to one indoor load air conditioner outdoor unit 3 through a refrigerant pipe to constitute a refrigeration cycle. The outside air load air conditioner 4 is connected to the outside air load air conditioner outdoor unit 5 through a refrigerant pipe to form a refrigeration cycle. An air supply passage 9 and an intake passage 10 are connected to the outside air load air conditioner 4. The air supply flow path is connected to a plurality of air supply ports 8 provided in the room 1. The intake passage 10 opens to the outside and is connected to an outside air intake 6 for taking in outdoor air and an indoor air intake 7 provided in the room 1 for taking in indoor air. Also, an outside air intake adjustment VAV11 is installed as a flow rate adjusting means in the intake flow path 10 that guides outside air, and an inside air intake adjustment VAV12 is installed in the intake flow path 10 that guides indoor air.

FIG. 2 shows an example of a schematic configuration of the control system of the air conditioning system of the present invention. This control system can be broadly divided into the air conditioning system control device 40, the CO concentration evaluation means 30, and the room.

2

The load air conditioner environment evaluation means 50, the outdoor load air conditioner environment evaluation means 51, the outside air environment evaluation means 52, and the flow rate adjustment means 11 and 12 for adjusting the flow rate of the intake air inside and outside.

The indoor load air conditioner environment evaluation means 50 includes an indoor load air conditioner suction temperature evaluation means 20, an indoor load air conditioner suction humidity evaluation means 21, and an indoor load air conditioner 2 blowout temperature evaluation means 22. And indoor air volume evaluation means 23 of the indoor load air conditioner 2. The outdoor load air conditioner environment evaluation means 51 includes a suction temperature evaluation means 24 of the outside air load air conditioner 4, a suction humidity evaluation means 25 of the outside air load air conditioner 4, a blowout temperature evaluation means 26 of the outside air load air conditioner 4, It consists of the outside air volume evaluation means 27 of the outside air load air conditioner 4. The outside air environment evaluation means 52 includes an outside air temperature evaluation means 28 and an outside air humidity evaluation means 29. The indoor air volume evaluation means 23 may measure with an air flow meter or use an air volume setting signal of an air conditioner. In addition, the outside air volume evaluation means 27 adjusts the outside air intake volume by using an air flow meter. It is also possible to use the setting signal of VAV11 for use and VAV12 for adjustment of intake air amount.

The air conditioning system control device 40 includes an outside air intake amount setting means 41 and an indoor load calculation means 4

2, an outside air load calculation means 43, an air conditioner operation characteristic evaluation means 45, and an air conditioner load distribution setting means 46.

[0017] The outside air intake amount setting means 41 receives the signal from the CO concentration evaluation means 30, and

2

The intake volume is set, and the outside air intake volume adjustment VAV11 is controlled based on this set value. Further, the load amount calculating means 42 of the indoor load air conditioner receives a signal from the indoor load air conditioner environment evaluation unit 50 and calculates the load of the indoor load air conditioner. The load amount calculating means 43 of the outside air load air conditioner receives the signals from the outdoor load air conditioner environment evaluation means 51 and the outside air intake amount setting means 41 and calculates the load of the outside air load air conditioner. The air conditioner operating characteristic evaluation means 45 has a database that shows the relationship between the load and power consumption of the indoor load air conditioner, which changes according to the condition of the intake air in the room and the condition of the outdoor air. Based on the signals from suction temperature evaluation means 20, humidity evaluation means 21, outside air temperature evaluation means 28, and outside air humidity evaluation means 29, the relationship between the air conditioning load and the power consumption of the air conditioner is set. Based on the signal from the computing means 42, the power consumption of the indoor load air conditioner can be evaluated.

[0018] Further, the air conditioner operation characteristic evaluation means 45 is a database that represents the relationship between the load of the outside air load air conditioner and the power consumption, which changes depending on the intake air condition of the outside air load air conditioner and the outdoor air condition. The air intake load air conditioner suction temperature evaluation means 24 and humidity evaluation means 25, the outside air temperature evaluation means 28, and the outside air humidity evaluation means 29 based on the signals from the air conditioning load and the power consumption of the air conditioner. It is possible to set the relationship and evaluate the power consumption of the outside air load air conditioner based on the signal from the load calculation unit 43 of the outside air load air conditioner.

[0019] The air conditioner load distribution setting means 46 is a load distribution allocated by continuously changing the total value of the load amount of the indoor load air conditioner and the load amount of the outdoor air load air conditioner at a constant value interval. Create multiple combinations of. For example, the load ratio between indoor load air conditioner 2 and outside air load air conditioner 4 is 1: 9, 2: 8, 3: 7, 4: 6, 5: 5, 6: 4, 7: 3, 8: 2. , 9: 1 to create a combination of loads assigned at nine ratios. For each load combination, air conditioner operating characteristic evaluation means 45 calculates the power consumption of indoor load air conditioner 2 and the power consumption of outdoor air load air conditioner 4. To do. The air conditioner load distribution setting means 46 calculates the total power consumption of the indoor load air conditioner 2 and the outside air load air conditioner 4 for each combination of load distributions based on these calculation results. Select a load distribution combination that consumes the least amount of power. The load distribution exceeding the maximum capacity of each air conditioner is excluded. The air conditioner load distribution setting means 46 controls the inside air intake amount adjustment VAV 12 based on the optimum load distribution. In other words, when increasing the load distribution of the outdoor air load air conditioner 4, control the internal air intake volume adjustment VAV12 to increase the intake volume of the indoor air, and increase the load distribution of the indoor load air conditioner. Then, the VAV12 for adjusting the intake air amount is controlled so as to reduce the intake air amount. At this time, the outside air intake amount is determined by receiving a signal from the CO concentration evaluation means 30 and

2

It is controlled at a constant level by VAV11 for adjusting the intake amount.

[0020] In the above description, the air conditioner load distribution setting means 46 discretely changes the load distribution of the indoor load air conditioner 2 and the outdoor air load air conditioner 4, and evaluates the total power consumption. Under the condition that the amount of indoor air taken into the outside air load air conditioner 4 is continuously changed, the load amount of the outside air load air conditioner 4 and the load amount of the indoor load air conditioner 2 are evaluated. The total power consumption of the load air conditioner may be obtained, the indoor air intake amount that minimizes this is set, and the VAV for adjusting the indoor air intake amount may be controlled.

[0021] In this air conditioning system, the indoor load air conditioner 2 keeps the air conditioning environment such as the temperature and humidity of the room 1 at a predetermined value. The capacity is controlled based on the difference, the room air is sucked in, cooled or heated, and then blown out into the room again. The outside air load air conditioner 4 also uses the set temperature as a target value to control the room temperature, the relationship between the outside air temperature and the set temperature, control the air conditioner capacity, cool the air taken in, and blow it out indoors.

[0022] The outdoor air flowing from the outside air intake 6 through the outside air intake adjustment VAV11 and the room air flowing from the inside air inlet 7 through the inside air intake adjustment VAV12 merge in the intake flow path 10. The enthalpy of air is reduced by the outside air load air conditioner 4 and supplied to the room 1 through the air supply passage 9 and the air inlet 8.

[0023] Ventilation, that is, introduction of outside air, is an indispensable air conditioning operation in order to maintain indoor air quality as well as indoor air quality. The required ventilation volume is proportional to the number of people in the room. For example, the ventilation rate of a room required by the Building Standard Law is 20m ³ / (1ι · person). This is based on keeping the indoor CO concentration due to CO generated by humans to an acceptable value.

twenty two

It is possible to control the outside air intake by measuring the indoor CO concentration. Book

2

In the embodiment, a signal from the indoor CO concentration measurement / evaluation means 30 is input to take in the outside air.

2

The air amount setting means 43 sets the outside air intake amount, and outputs the outside air intake amount command value to the outside air intake amount adjustment VAV11.

[0024] Generally, when outside air is introduced without providing the outside air load air conditioner 4, both the outside air load and the indoor load are processed by the indoor load air conditioner 2. In this case, the intake temperature of the indoor load processing air conditioner 2 is an indoor air temperature lower than the outside air temperature. On the other hand, when the outside air conditioning air conditioner 4 is provided separately from the indoor load air conditioner 2 as in this embodiment, the intake temperature of the outside air load air conditioner 4 is the outdoor air temperature, which is higher than the indoor air temperature. Therefore, the performance of the air conditioner (C OP = air conditioning capacity / input energy) is improved and energy is saved compared to the case where the outside air load air conditioner 4 is not provided.

[0025] Here, the control concept regarding the outside air intake amount and the load distribution between the indoor load air conditioner 2 and the outside air load air conditioner 4 will be described. Table 1, the design personnel compartment in the floor area 375m ² rooms and 75 people, wall material, thickness, set the magnitude and direction and the material of the window, indoor air-conditioning temperature is 27 ° C, 50% humidity In this example, the air conditioning load is divided into an indoor load and an outdoor air load under the condition that the outside air introduction amount is proportional to the number of people in the room. The conditions for the outside air temperature are 33 ° C assuming a summer peak and 28 ° C assuming an intermediate period, and the number of people in the room is 75 people, and the number of people is reduced to about half. Nite, evaluate it. This load calculation was evaluated according to the heating and cooling load calculation method of the Air Conditioning Sanitation Engineering Handbook.

[0026] [Table 1] table 1

In the partial load condition where the number of indoors is 75 people and the outside air temperature is 33 ° C, the indoor load and the outside air load are reduced under the partial load condition where the number of indoor people is reduced or the outside air temperature is reduced. In particular, it can be seen that the rate of decrease in the outside air load is large. This is because when the number of indoor people decreases, the amount of ventilation is reduced in proportion to the number of people and the outdoor air load is reduced. While the outside air load is reduced, the indoor load is a constant amount of heat generated by internal heat generation equipment and solar radiation. This is because the ratio is relatively small.

[0027] Based on the evaluation results of the air conditioning load in Table 1, the air conditioning unit in Table 1 was selected by selecting the air conditioning unit of 28kW as the rated capacity of the indoor load air conditioner 2 and 16kW as the rated capacity of the outside air load air conditioner 4, respectively. Table 2 shows the ratio of the load to each rated capacity as the load factor of each air conditioner with respect to the conditions. Specifically, the indoor load when the outside air temperature is 33 ° C and the number of indoor persons is 75 is 24.4kW from Table 1. Dividing this value by 28 kW, selected as the rated capacity of the indoor load air conditioner, the corresponding load factor of 0.87 in Table 2 can be calculated.

[0028] [Table 2]

Table 2

Outside air temperature

3 3 ° C 2 8 ° C

Indoor load factor Outdoor load factor Indoor 'load factor Outdoor load factor

Room

7 5 people 0. 8 7 0. 8 9 0, 8 3 0, 2 3

Man

Number 0 0 0 7 3 0. 4 0. 6 8 0. 1 5 In this example, it can be seen from this table that the load drops below the load factor of the outside air load air conditioner under partial load conditions.

[0029] Figure 3 shows the operating characteristics of the air conditioner. The horizontal axis represents the load factor of the air conditioner (ratio of load to the rated capacity of the air conditioner), and the vertical axis represents the performance of the air conditioner COP (= air conditioning Capability / input energy) ratio (ratio of COP at partial load to COP at rated load of air conditioner) is plotted, and the characteristics are plotted under certain indoor air conditions and outdoor air conditions. In general, in an air conditioner, the COP increases as the load decreases as the rated force partially decreases.For example, the maximum COP is obtained when the load factor is 50 to 70%, and the COP decreases when the load factor further decreases. .

[0030] The operating point of the air conditioner with respect to the load condition is plotted on the characteristic curve of FIG. In other words, the operating point of the indoor load air conditioner 2 for the partial load operation of the outside air temperature of 33 ° C and 75 people in the room is AO with a load factor of 0.87, and the operating point of the outdoor air load air conditioner 4 is the load factor of 0. 89 becomes B0. The indoor load air conditioner 2 and the outdoor air load air conditioner 4 have slightly different operating characteristics because the intake air temperature is different. However, the basic tendency of the characteristics does not change and there is no problem with the following discussion, so they are represented by the same curve. In contrast to the partial load operation described above, under the partial load conditions of an outside air temperature of 28 ° C and indoor number of 75 people, the operating point of the indoor load air conditioner 2 is A1 with a load factor of 0.83, and the outside air load air conditioner The operating point of 4 is B1 with a load factor of 0.23. It can be seen that the indoor load air conditioner 2 becomes energy-saving when the COP is high, but the COP of the outside air load air conditioner 4 greatly decreases and the energy consumption increases. Here, the outdoor air load air conditioner 4 supplies the room 1 with reduced humidity as well as the temperature of the outdoor air. The indoor load air conditioner 2 absorbs indoor loads such as air-conditioning loads other than the outside air load, that is, indoor heat generated by equipment and the human body, solar radiation and heat transfer, and external heat intrusion due to heat conduction. Air force is also taken away and blown into the room. However, in order to keep the indoor air-conditioning environment in a predetermined state, it is sufficient if the total of the indoor load and the outside air load can be processed by both the indoor load air conditioner and the outside air load air conditioner.

[0031] Therefore, the capacity of the indoor load air conditioner 2 is reduced and the operating point is moved from A1 to A1 ', the capacity of the outside air load air conditioner 4 is increased and the operating point is moved from B1 to B1', The total air conditioning capacity is controlled to be kept equal. By controlling in this way, the indoor load air conditioner 2 and the outside Both air load air conditioners 4 have improved COP and can be operated energy saving. That is, the air conditioning system of this embodiment includes two air conditioners, an indoor load air conditioner 2 and an outside air load air conditioner 4. In addition, the intake of outside air is controlled according to the indoor CO concentration.

2

It is a configuration to control. In addition, the operation characteristics of the indoor load air conditioner 2 and the outside air load air conditioner 4 are evaluated, and the load distribution of the indoor load air conditioner 2 and the outside air load air conditioner 4 that determines the total energy consumption is determined to control the operation. Therefore, energy-saving operation can be performed.

[0032] When controlling the load distribution of the indoor load air conditioner 2 and the outdoor air load air conditioner 4 to be a determined value, the indoor air intake amount adjustment for adjusting the indoor air intake amount to the outdoor load air conditioner 4 is performed. This is done by controlling VAV12. That is, when the load distribution of the outside air load air conditioner 4 is increased, the inside air intake amount adjustment VAV 12 is controlled so as to increase the intake amount of the room air. As a result, the room air is cooled and dehumidified by the outside air load air conditioner 4 and then blown out again into the room, so that the load of the outside air load air conditioner 4 increases. On the other hand, since the indoor load air conditioner 2 can achieve the target set temperature with a small amount of cooling, the load amount of the indoor load air conditioner 2 decreases. In addition, when the load distribution of the indoor load air conditioner 2 is increased, the VAV for adjusting the intake air amount is controlled so that the intake amount of the indoor air is decreased. As a result, the reverse phenomenon occurs, the load on the outside air load air conditioner 4 decreases, and the load on the inside air load air conditioner increases.

[0033] Further, as a method for controlling the load distribution between the indoor load air conditioner 2 and the outdoor air load air conditioner 4 to be a determined value, the compressors of the indoor load air conditioner 2 and the outdoor air load air conditioner 4 can be directly controlled. The wave number can also be controlled.

[0034] As shown in the explanation of Fig. 2, the air conditioner load distribution setting means 46 changes the respective load amounts of the indoor load air conditioner 2 and the outdoor load air conditioner 4 to preset values to perform air conditioning. Machine Operation characteristic evaluation means 45. The air conditioner operating characteristic evaluation means 45 evaluates the operating characteristics based on the received load amount of each of the air conditioners, the intake temperature, humidity, air volume of each air conditioner, the outside air temperature of the intake air of each air conditioner outdoor unit, etc. To do. The air conditioner load distribution setting means 46 determines the load distribution that minimizes the total energy consumption from the evaluation result of the air conditioner operation characteristic evaluation means 45. In the air conditioner load distribution setting means 46, the room The load distribution may be determined so that the ratio between the load amount of the internal load air conditioner 2 and the rated capacity and the ratio between the load amount of the outside air load air conditioner and the rated capacity are equal. In this case, there is an advantage that the control algorithm becomes simpler and the response speed of the control becomes faster.

As described above, in this embodiment, the indoor load air conditioner 2 and the outdoor air load air conditioner 4 are provided. Furthermore, a flow path is provided to join outdoor air and room air and lead to the outdoor air load air conditioner 4 and to adjust the intake amount of the outdoor air and room air, respectively. Then, means for calculating the load amount of the indoor load air conditioner 2 and air conditioner operation characteristic evaluation means 45 for calculating the load amount of the outdoor load air conditioner 4 are provided. Furthermore, the outside air intake amount is set by the outside air intake amount setting means 41 according to the indoor CO concentration, and the indoor air intake amount is set.

2

The input amount is controlled to set an optimal distribution based on the load amount of the indoor load air conditioner 2 and outdoor load air conditioner 4 and the operating characteristics of the air conditioner. As a result, it is possible to provide an air conditioning system that can maintain the indoor thermal environment comfortably, maintain the indoor environment by properly ventilating, and reduce the total energy consumption.

Example 2

Next, another embodiment of the control system of the air conditioning system of the present invention will be described with reference to FIG. The difference from Fig. 2 is that a building management system 31 is provided, and an indoor person estimation estimating means 32 is provided instead of the C02 concentration evaluating means 30. The building management system 31 includes entrance / exit management information and operation information of personal computers. Based on this information, the indoor population estimation / evaluation means 32 estimates and evaluates the number of seated persons in the air-conditioned room, and sends an information signal of the number of seated persons to the outside air intake amount setting means 41 of the air conditioning system control device 40. The outside air intake setting means 41 sets the outside air intake based on the information on the number of people in the seat, and controls the outside air intake adjustment VAV11 based on this set value!

[0037] In this embodiment, the information on the building management system is used without using the CO concentration evaluation means.

2

The number of people in the room is estimated and the amount of outside air intake is set.

There is an advantage that the cost of the system can be reduced without the need to install 2 etc.

Example 3

Next, another embodiment of the air conditioning system of the present invention will be described with reference to FIG. The difference from Fig. 1 is that indoor air outlet 13 is provided in room 1 so that the exhausted air is outside air load air conditioner 4 The exhaust flow path 14 is installed so as to be led to the air suction port of the outdoor unit 5. Other configurations are the same as those of the embodiment of FIG.

In the present embodiment, in the cooling operation in summer, air cooled indoors is used for cooling the outdoor unit 5 for the outdoor load air conditioner. For this reason, the efficiency of the outdoor load air conditioner 4 is higher than that of cooling with outdoor high-temperature air. Furthermore, since the air warmed indoors is used for heating the outdoor unit in the heating operation in winter, the efficiency of the outdoor load air conditioner 4 is higher than that of heating with outdoor air having a low temperature. For this reason, there is an advantage that more energy-saving operation is possible. In this embodiment, the exhaust from the room is led to the air intake and inlet of the outdoor unit 5 for the outdoor load air conditioner. However, it is led to the air suction and inlet of the outdoor unit 3 for the indoor load air conditioner. Even if it leads to both, it has the same effect.

Example 4

Next, another embodiment of the air conditioning system of the present invention will be described with reference to FIG. The difference from Fig. 1 is that both the indoor load air conditioner 2 and the outdoor load air conditioner 4 are connected to the indoor load air conditioner outdoor unit 15 by refrigerant piping to form a refrigeration cycle. Other configurations are the same as in the embodiment of FIG.

[0041] In this embodiment, both the indoor load air conditioner and the outdoor load air conditioner are connected to one outdoor unit and the refrigerant pipe to configure the refrigeration cycle, so that the system can be simplified and the cost can be reduced. is there. For each air conditioner configured in one cycle, the load distribution among the air conditioners is changed by adjusting the refrigerant throttle valve (not shown) installed in the refrigerant piping of each air conditioner. Resistance and wasteful flow in the cycle are reduced, and energy can be saved in the same manner as in the embodiment of FIG.

Brief Description of Drawings

[0042] [Fig. 1] An embodiment of the air conditioning system of the present invention.

FIG. 2 shows an embodiment of the control system for the air conditioning system of the present invention.

[Figure 3] Air conditioner operating characteristics

[Fig. 4] Another embodiment of the control system of the air conditioning system of the present invention

FIG. 5 shows another embodiment of the air conditioning system of the present invention.

[Fig. 6] Another embodiment of the air conditioning system of the present invention Explanation of symbols

1 ·· Indoor, 2 ·· Indoor load air conditioner, 3 ·· Outdoor unit of indoor load air conditioner, 4 ·· Outside air load air conditioner, 5 ·· Outdoor unit of outside air load air conditioner, 6 ·· Outside air intake 7 · · Inside air intake port, 8 · · Air supply port, 9 · · Air supply channel, 10 · · Intake channel, 11 · · VAV for outside air intake adjustment, 12 · · · VAV for inside air intake adjustment, 13 · · Exhaust port, 14, Exhaust flow path, ··· Outdoor unit, 30 ·-CO concentration evaluation means, 31 · 'Building management system, 32 · · Number of people estimation evaluation means, 40 ·-

2

Air-conditioning system controller 41 ···· Outside air intake volume setting means · ························································································································ Evaluation of air-conditioning air operation Means 46 · · Air conditioner load distribution setting means.

Claims

The scope of the claims

[1] Indoor load air conditioner for processing indoor air conditioning load, intake side flow path for taking in air of outdoor force and the above-mentioned suction !, outdoor air load air conditioner for processing the load of air taken into the intake side flow path With

A flow path for guiding the indoor air to the flow path on the suction side of the outdoor air load air conditioner is provided, and a flow rate adjusting means for adjusting the intake amount of outdoor air and a flow rate adjusting means for adjusting the intake amount of indoor air are provided. An air conditioning system characterized by that.

[2] In the air conditioning system according to claim 1,

Controls the amount of air taken in from the outside according to the number of people in the room or the concentration level of carbon dioxide in the indoor air, and the outside air load air conditioner depends on the load amount of the indoor load air conditioner and the load amount of the outside air load air conditioner. An air conditioning system characterized by controlling its capacity.

[3] In the air conditioning system according to claim 1,

The outdoor air intake air amount is controlled by the flow rate adjusting means for adjusting the intake amount of the outdoor air according to the number of people in the room or the concentration level of carbon dioxide gas etc. in the indoor air. An air conditioning system in which the flow rate of indoor air is controlled by a flow rate adjusting means that adjusts the intake amount of indoor air according to the load of the machine.

[4] In the air conditioning system according to claim 1,

Control the outside air intake air volume according to the number of people in the room or the concentration level of carbon dioxide etc. in the indoor air, the ratio between the load amount and rated capacity of the indoor load air conditioner, and the load amount and rated capacity of the outside air load air conditioner The air conditioning system is characterized by controlling the flow rate of indoor air to the outside air load air conditioner so that the ratio of

[5] In the air conditioning system according to claim 1,

In addition to controlling the outside air intake air volume according to the number of people in the room or the concentration level of carbon dioxide, etc. in the indoor air, it is equipped with a means for evaluating the load amount of the indoor load air conditioner and the load amount of the outdoor air load air conditioner. Air conditioner operation characteristic evaluation means that can simulate the operation characteristics of load air conditioners and outside air load air conditioners, and load distribution between indoor load air conditioners and outside air load air conditioners based on the evaluation results of the air conditioner operation characteristic evaluation means Optimal air conditioner load distribution An air conditioning system comprising a control device having setting means.

[6] In the air conditioning system according to claim 5,

An air conditioning system that controls load distribution between an indoor load air conditioner and an outdoor air conditioner by adjusting the amount of indoor air taken into the outdoor load air conditioner.

[7] In the air conditioning system according to claim 5 or 6,

A load amount calculation means for an indoor load air conditioner that includes each evaluation means for suction temperature, humidity and blowing temperature, and air volume of an indoor load air conditioner, and calculates the load amount of the indoor load air conditioner based on a signal from the evaluation means The load of the outside air load air conditioner is equipped with an evaluation means for the intake air temperature, humidity and blowout temperature, and air volume of the outside air load air conditioner, and calculates the load amount of the outside air load air conditioner based on the signals from these evaluation means. An air conditioning system characterized by having a quantity calculation means.

[8] The air conditioning system according to any one of claims 2 to 6, wherein

Equipped with indoor unit estimation and estimation means that estimates the number of people in the room based on information from the building management system, such as information on the operation of the computer or on / off room management information, and the amount of outside air intake is calculated based on the estimated result. An air conditioning system comprising a control device for controlling.

[9] In the air conditioning system according to any one of claims 1 to 7,

An air conditioning system and an air conditioning system, characterized in that a flow path is provided for guiding exhaust air from the room to a cooling air suction port of an outdoor unit of an indoor load air conditioner or an outdoor air load processing air conditioner.