JP6990201B2 - Building air conditioning method and building air conditioning system - Google Patents

Description

The present invention relates to a method for air-conditioning a space in a building and the like.

The following Patent Document 1 proposes a ventilation air-conditioning unit for ventilating and air-conditioning a space inside a building. This unit includes an indoor unit of an air conditioner and an air supply means for supplying air conditioned by the indoor unit to the space.

Japanese Unexamined Patent Publication No. 2017-198395

By the way, in recent years, air conditioners may operate a heat exchanger under an operating condition different from the instructed operating operation even though the heating operation is instructed. In this case, there is a problem that air that is not originally intended is supplied to the inside of the building and the comfort is impaired.

The present invention has been devised in view of the above circumstances, and an object of the present invention is to provide an air-conditioning method and an air-conditioning device capable of air-conditioning the inside of a building without impairing comfort.

The present invention is a method for air-conditioning a space in a building, and is an air-conditioning step in which air conditioned by operating an air-conditioning machine is supplied to the space by a fan provided separately from the air-conditioning machine. In the air conditioning step, when the air conditioner is determined to be in another operating condition even though the cooling operation is instructed, or when the heating operation is instructed, It is characterized by including an air volume reducing step of relatively reducing the air volume of the fan when it is determined that the operating condition is other than the above.

In the air conditioning method for the building according to the present invention, after the air volume lowering step, an air volume increasing step for relatively increasing the air volume of the fan when the air conditioner reaches the instructed operating condition is further performed. It may be included.

In the building air conditioning method according to the present invention, the operating conditions are the temperature _To of the air discharged from the discharge port of the indoor unit of the air conditioner and the temperature of the air supplied to the suction port of the indoor unit. The determination may be made based on the temperature difference from _Ti (To − _{Ti )} .

In the building air conditioning method according to the present invention, when the air conditioner is instructed to perform the heating operation and the temperature difference (To- _Ti ) is _smaller than a predetermined threshold value, the operation is performed. The situation may be determined to be other than the heating operation.

In the building air conditioning method according to the present invention, when the air conditioner is instructed to perform the cooling operation, the operation is performed when the temperature difference (To- _Ti ) is _larger than a predetermined threshold value. The situation may be determined to be other than the cooling operation.

In the building air conditioning method according to the present invention, the process of calculating the actual air conditioning capacity of the air conditioner based on the operating condition of the air conditioner, and the actual air conditioning capacity and the expected capacity of the air conditioner Based on this, a step of determining the presence or absence of an abnormality in the air conditioner may be further included.

In the air conditioning method for the building according to the present invention, if the ratio between the actual air conditioning capacity and the expected capacity is equal to or less than a predetermined threshold value, it may be determined that the air conditioner has an abnormality. ..

The present invention is a device for air-conditioning a space in a building, and supplies an air conditioner and air separately provided from the air conditioner and air-conditioned by the air conditioner to the space. The control means includes a fan and a control means for controlling the fan, and the control means determines that the operating condition is other than that of the air conditioner even though the cooling operation is instructed, or the heating operation. However, it is characterized by including an air volume adjusting unit that relatively reduces the air volume of the fan when it is determined that the operating condition is other than that.

In the air conditioner of the building according to the present invention, the air volume adjusting unit reduces the air volume of the fan relatively, and then when the air conditioner reaches the instructed operating condition, the air volume of the fan is reached. May be relatively large.

In the air conditioner of the building according to the present invention, the exhaust temperature _detecting means for detecting the temperature To of the air discharged from the discharge port of the indoor unit of the air conditioner and the suction port of the indoor unit are supplied. Further including a suction temperature detecting means for detecting the temperature _Ti of the air, the air volume adjusting unit measures the operating condition with the temperature To of the discharged air and the temperature _Ti of the _supplied air. The judgment may be made based on the temperature difference (To − _{Ti )} from the above.

In the air conditioner of the building according to the present invention, when the air conditioner is instructed to perform the heating operation, the air volume adjusting unit has a temperature difference (To − _Ti ) _larger than a predetermined threshold value. If it is small, it may be determined that the operating condition is other than the heating operation.

In the air conditioner of the building according to the present invention, when the air conditioner is instructed to perform the cooling operation, the air volume adjusting unit has a temperature difference (To − _Ti ) _larger than a predetermined threshold value. If it is large, it may be determined that the operating condition is other than the cooling operation.

In the air-conditioning apparatus of the building according to the present invention, the control means includes an actual air-conditioning capacity calculation unit that calculates the actual air-conditioning capacity of the air conditioner based on the operating status of the air conditioner, and the actual air-conditioning capacity. An abnormality determination unit for determining the presence or absence of an abnormality in the air conditioner may be further included based on the expected capability of the air conditioner.

In the air conditioner of the building according to the present invention, the abnormality determination unit has an abnormality in the air conditioner when the ratio between the actual air conditioning capacity and the expected capacity is equal to or less than a predetermined threshold value. You may judge that.

In the present invention, when it is determined that the air conditioner is in an operating condition different from the instructed operating operation, the air volume of the fan provided separately from the air conditioner can be relatively reduced. Therefore, it is possible to suppress the supply of air that was not originally intended inside the building, and the comfort is not impaired.

It is sectional drawing which shows an example of a building in which the air conditioning method of a building is carried out. It is a conceptual diagram which shows an example of the structure of a control means. It is a flowchart which shows an example of the processing procedure of the air-conditioning method of a building. It is a flowchart which shows an example of the processing procedure of an air conditioning process. It is a conceptual diagram which shows an example of the structure of the control means of another embodiment of this invention. It is a flowchart which shows an example of the processing procedure of the air-conditioning process of another embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The building air-conditioning method of the present embodiment (hereinafter, may be simply referred to as "air-conditioning method") is for air-conditioning the space inside the building. FIG. 1 is a cross-sectional view showing an example of a building 2 in which a building air conditioning method (hereinafter, may be simply referred to as “air conditioning method”) is implemented. It should be noted that the drawings are intended to enhance the understanding of the contents of the invention, and it is pointed out in advance that the scales and the like do not exactly match between the drawings, in addition to the exaggerated display.

The building 2 is exemplified as a house, but may be a building or the like. The space 3 includes an underfloor space 4 and an above-floor space 5. In the present embodiment, the case where the air-conditioned space 3 is an above-floor space 5 is exemplified.

The underfloor space 4 is a space surrounded by the foundation, the ground, and the floor 6 on the first floor. The foundation is provided with an opening 7 for taking in the outside air A1. The outside air A1 taken in from the opening 7 exchanges heat with the heat in the ground where the temperature does not change much throughout the year through the ground. As a result, the underfloor space 4 can store A2, which is relatively cool in the summer and relatively warm in the winter (hereinafter, may be simply referred to as “underfloor air”) as compared with the outside air.

The above-floor space 5 is a space provided above the underfloor space 4. The floor space 5 of the present embodiment includes a plurality of living rooms 8 and non-living rooms (not shown) such as a washroom and a toilet. The living room 8 of the present embodiment includes the living rooms 8a and 8b on the first floor. The living room 8 may include a living room (not shown) provided on the second floor or higher. The floor space 5 may be provided with, for example, an exhaust fan (not shown) that forcibly discharges at least a part of the air in the floor space 5 to the outside.

In the air-conditioning method of the present embodiment, a device (hereinafter, may be simply referred to as “air-conditioning device”) 10 for air-conditioning the space 3 (in the present embodiment, the space above the floor 5) is used.

The air conditioner 10 includes an air conditioner 11, a fan 12 provided separately from the air conditioner 11, and a control means 13. In the present embodiment, the air conditioner 11 and the fan 12 are housed inside the chamber box 14, but are not limited to such an embodiment. Further, the air conditioner 10 of the present embodiment includes an exhaust temperature detecting means 15 and a suction temperature detecting means 16.

The chamber box 14 of the present embodiment is installed on the floor 6, but may be installed under the floor 6 or may be installed in the back of the cabin, for example. Further, although the chamber box 14 is installed on the floor 6 on the first floor, it may be installed on the floor 6 on the second floor or higher, for example.

The chamber box 14 is formed in a box shape having a space inside thereof. The air conditioner 11 and the fan 12 are housed inside the chamber box 14. The chamber box 14 of the present embodiment is provided with an air supply port (not shown) and an outside air intake port 18, but only one of the air supply port and the outside air intake port 18 may be provided. ..

The air supply port (not shown) is for supplying the air A3 circulating in the plurality of spaces 3 to the inside of the chamber box 14. The air supply port communicates between the inside of the chamber box 14 and the living room 8.

The outside air intake port 18 is for taking in the outside air A1 (underfloor air A2) inside the chamber box 14. In the present embodiment, the outside air A1 (underfloor air A2) is taken in through the underfloor space 4, but only the outside air A1 may be taken in directly from the outside.

A duct 21 for communicating the inside of the chamber box 14 and the underfloor space 4 (shown in FIG. 1) is connected to the outside air intake port 18 of the present embodiment. The duct 21 is provided with an outside air supply fan 22 (shown in FIG. 1) for sending the underfloor air A2 (outside air A1) to the outside air intake port 18. The air volume of the outside air supply fan 22 can be appropriately set, and is set based on, for example, the ventilation frequency required for the building 2.

As the air conditioner 11, a case where it is a general household separate type air conditioner is exemplified. The air conditioner 11 includes an indoor unit 11A and an outdoor unit (not shown) installed outside the building 2 as a set. The indoor unit 11A has a suction port 23 and a discharge port 24. The suction port 23 is for taking air into a heat exchanger (not shown) inside the indoor unit 11A. The discharge port 24 is for discharging the air A4 air-conditioned by the heat exchanger.

In the present embodiment, an air supply port (not shown) and an outside air intake port 18 are provided in the vicinity of the suction port 23 of the indoor unit 11A (above the suction port 23 in the present embodiment). As a result, the air conditioner 11 can air-condition the mixture of the air A3 circulating in the space 3 and the underfloor air A2 (outside air A1), so that the space 3 is ventilated while circulating the air in the space 3. And can be air-conditioned.

The air conditioner 11 can perform cooling operation and heating operation. In the cooling operation, air (air-conditioned air) A4 having a temperature lower than the air (air supplied to the suction port 23) in the space 3 (in this embodiment, the floor space 5) is discharged from the discharge port 24. To. On the other hand, in the heating operation, air (air-conditioned air) A4 having a temperature higher than that of the air in the space 3 (air supplied to the suction port 23) is discharged from the discharge port 24.

The conditioned air A4 may be purified by a filter (not shown) provided in the chamber box 14. As a result, the air conditioner 10 can supply the purified air to the space 3.

The fan 12 is for supplying the air-conditioned air A4 to the space 3. Since the fan 12 of the present embodiment is provided separately from the air conditioner 11, the air conditioner 11 and the fan 12 can be maintained individually.

The fan 12 of the present embodiment supplies the air-conditioned air A4 to the space 3 (in this example, the living rooms 8a and 8b on the first floor) through the duct 25. As the fan 12, a sirocco fan can be adopted, but the fan 12 is not limited to such an aspect. In the present embodiment, it is composed of one fan 12, but it may be composed of a plurality of fans 12.

The air volume of the fan 12 can be appropriately set. The fan 12 of the present embodiment is configured to be configurable to a first air volume and a second air volume smaller than the first air volume. The first air volume and the second air volume can be set as appropriate. The first air volume may be adjusted in a plurality of steps according to the magnitude of the amount of air (air-conditioned air A4) discharged from the discharge port 24 of the indoor unit 11A. Further, it is desirable that the second air volume is set based on the ventilation frequency required for the building 2.

The discharge temperature _detecting means 15 is for detecting the temperature (hereinafter, may be simply referred to as “discharge temperature”) To of the air (air-conditioned air A4) discharged from the discharge port 24 of the indoor unit 11A. Is. The discharge temperature detecting means 15 of the present embodiment is configured as a temperature sensor attached to the vicinity of the discharge port 24 of the indoor unit 11A inside the chamber box 14.

The suction temperature detecting means 16 is for detecting the temperature of the air supplied to the suction port 23 of the indoor unit 11A (hereinafter, may be simply referred to as “suction temperature”) _Ti . The suction temperature _Ti may be the temperature of the air A3 after circulating in the plurality of spaces 3, or may be the temperature of the air-fuel mixture of the circulating air A3 and the underfloor air A2 (outside air A1). good. The suction temperature detecting means 16 of the present embodiment is configured as a temperature sensor attached to the vicinity of the suction port 23 of the indoor unit 11A inside the chamber box 14, but for example, the space 3 in which the chamber box 14 is installed. It may be a temperature sensor or the like provided in.

The control means 13 is for controlling the fan 12 and the like constituting the air conditioner 10. The control means 13 is installed on, for example, a partition wall or the like. FIG. 2 is a conceptual diagram showing an example of the configuration of the control means 13.

The control means 13 includes a calculation unit 31 composed of a CPU (central processing unit), a storage unit 32 in which processing procedures are stored, and a working memory 33 for reading processing procedures and the like stored in the storage unit 32. It is configured to include.

An input means 34 is connected to the calculation unit 31. The input means 34 is composed of, for example, an operation button, a touch panel, or the like provided on the housing (shown in FIG. 1) of the control means 13. With this input means 34, for example, information input by a resident or the like can be transmitted to the calculation unit 31. The information to be input includes, for example, instruction information for starting and stopping the air conditioning operation (heating operation or cooling operation).

An output means 35 is connected to the calculation unit 31. The output means 35 is configured as a display provided in the housing of the control means 13. By transmitting a signal to the output means 35, the calculation unit 31 can display, for example, the operating status of the air conditioner 10.

The discharge temperature detecting means 15 and the suction temperature detecting means 16 are connected to the calculation unit 31. As a result, the calculation unit 31 transmits a signal to the discharge temperature detecting means 15 and the suction temperature detecting means 16, so that the temperature (discharge temperature) of the air discharged from the discharge port 24 (shown in FIG. 1) of the indoor unit 11A is reached. ) To and the temperature (suction temperature) _Ti of the air supplied to the suction port 23 (shown in FIG. 1) of the indoor unit _11A can be detected and the detection result can be transmitted to the calculation unit 31. can.

The air conditioner 11 shown in FIG. 1 is connected to the calculation unit 31. As a result, the calculation unit 31 can instruct the start and stop of the air conditioning operation (cooling operation and heating operation) by transmitting a signal to the air conditioner 11. The instruction to start and stop the air-conditioning operation may be directly given by a resident or the like without going through the calculation unit 31.

The fan 12 shown in FIG. 1 is connected to the calculation unit 31. As a result, the calculation unit 31 can instruct the start and end of the operation of the fan 12 and control the air volume of the fan 12 by transmitting a signal to the fan 12.

The storage unit 32 is, for example, a non-volatile information storage device. The storage unit 32 includes a data unit 37 and a program unit 38. The data unit 37 is for storing the calculation result or the like by the calculation unit 31. The program unit 38 is a program executed by the arithmetic unit 31.

The program unit 38 of the present embodiment includes a determination unit 41, an air conditioning operation start / stop unit 42, and an air volume adjusting unit 43. The determination unit 41 is for determining whether or not there is an instruction to start or stop the air conditioning operation, whether or not there is an instruction to end the air conditioning method, and the like. The air conditioning operation start / stop unit 42 is for starting and stopping the air conditioning operation by the air conditioner 11. The air volume adjusting unit 43 is for adjusting the air volume of the fan 12 based on the operating condition of the air conditioner 11. Details of the functions of these programs will be described in the air conditioning method described later. The program unit 38 may include programs other than these programs.

FIG. 3 is a flowchart showing an example of the processing procedure of the air conditioning method of the building 2. In the air conditioning method of the present embodiment, it is first determined whether or not there is an instruction to start the air conditioning operation (step S1). In step S1, the calculation unit 31 shown in FIG. 2 is executed by executing the determination unit 41 included in the program unit 38. The determination as to whether or not there is an instruction to start the air conditioning operation is performed, for example, based on the instruction information for starting the air conditioning operation (heating operation or cooling operation) input by the resident or the like to the input means 34.

When it is determined in step S1 that there is an instruction to start air conditioning operation (“Y” in step S1), the next air conditioning step S2 is carried out. On the other hand, if it is determined in step S1 that there is no instruction to start air conditioning operation (for example, there is an instruction to stop air conditioning operation) (“N” in step S1), whether or not there is an instruction to end the air conditioning method. Step S3 for determining the above is carried out.

Next, in the air conditioning step S2, as shown in FIG. 1, the air A4 air-conditioned by the operation of the air conditioner 11 is supplied to the space 3 by using the fan 12. FIG. 4 is a flowchart showing an example of the processing procedure of the air conditioning step S2.

In the air conditioning step S2 of the present embodiment, first, the air conditioning operation by the air conditioner 11 (shown in FIG. 1) is started (step S21). In step S21, the calculation unit 31 shown in FIG. 2 is executed by executing the air conditioning operation start / stop unit 42 of the program unit 38.

In step S21, the calculation unit 31 transmits a signal for starting one of the cooling operation and the heating operation to the air conditioner 11 based on the instruction information for starting the air conditioning (heating operation or cooling operation). As a result, in step S21, the air conditioner 11 starts the instructed operation (either the cooling operation or the heating operation).

Further, in step S21, the calculation unit 31 transmits a signal for setting the air volume of the fan 12 to a relatively large first air volume. As a result, as shown in FIG. 1, the fan 12 can supply the air-conditioned air A4 to the space 3 with the first air volume. If the fan 12 is stopped in step S21, the operation of the fan 12 is started and the first air volume is set.

In step S21, as shown in FIG. 1, the air-conditioned air A4 can be supplied to the space 3 by operating the air conditioner 11 and the fan 12. As a result, in the air conditioning step S2, the air conditioning (heating operation or cooling operation) of the space 3 can be started, so that the comfort in the space 3 can be enhanced.

By the way, in recent years, the air conditioner 11 may operate a heat exchanger (not shown) in an operating condition different from the instructed operating operation. As an example of an operation situation different from the instructed operation operation, an operation in which a cooling operation is temporarily performed in order to melt the frost attached to the outdoor unit even though the heating operation is instructed (defrost operation). Although the cooling operation is instructed, for example, an operation of temporarily performing a heating operation (internal cleaning function) in order to suppress the growth of mold in the indoor unit 11A, and a suction port of the indoor unit 11A. In order to remove dust from the filter of 23, there is an operation (filter cleaning function) of temporarily stopping the air conditioning. When such an operation is performed, there is a problem that air that is not originally intended is supplied to the inside of the building 2 and the comfort is impaired.

In the air conditioning step S2 of the present embodiment, in order to suppress the supply of the originally unintended air as described above to the inside of the building 2, the air conditioner 11 is instructed to operate. In step S22 for determining whether or not the air conditioner 11 is in a different operating condition, and when it is determined that the air conditioner 11 is in an operating condition different from the instructed operating operation, the air volume of the fan 12 is relatively reduced. The air volume reduction step S23 is carried out.

The step S22 is performed by the calculation unit 31 shown in FIG. 2 executing the determination unit 41 of the program unit 38. In the present embodiment, when it is determined that the air conditioner 11 is in an operating condition different from the instructed operating operation, the other operating conditions (for example, heating) are instructed even though the cooling operation is instructed. This includes the case where the operation or the cooling operation is stopped) or the case where the heating operation is instructed but the other operating conditions (for example, the cooling operation or the heating operation is stopped) are entered.

Whether or not the air conditioner 11 is in an operating condition different from the instructed operating operation can be appropriately determined. In step S22 of the present embodiment, the temperature (discharge temperature) To of the air discharged from the discharge port 24 (shown in FIG. 1) of the indoor unit _11A and the suction port 23 (shown in FIG. 1) of the indoor unit 11A are connected. The above operating condition is determined based on the temperature difference (To − _Ti ) from the temperature ( _suction temperature) _Ti of the supplied air. The discharge temperature _To can be detected by the calculation unit 31 transmitting a signal to the discharge temperature detecting means 15 (shown in FIGS. 1 and 2). The suction temperature _Ti can be detected by the calculation unit 31 transmitting a signal to the suction temperature detecting means 16 (shown in FIGS. 1 and 2).

For example, when the cooling operation is instructed but other operating conditions (for example, the heating operation or the cooling operation is stopped), the temperature difference (To- _Ti ) becomes _smaller than that during the cooling operation. Or, the discharge temperature To tends to be higher than the _suction temperature _Ti . Therefore, in step _S22 , when the air conditioner 11 is instructed to perform cooling operation and the temperature difference (To − _Ti ) is larger than a predetermined threshold value, the operating condition is other than the cooling operation. It is judged that it is. The threshold value can be set as appropriate. The threshold value of this embodiment can be set in the range of −5 ° C. to + 5 ° C. (0 ° C. in this embodiment).

On the other hand, in the case of other operating conditions (for example, cooling operation or stop of heating operation) even though the heating operation is instructed, the temperature difference (To- _Ti ) becomes _smaller than that during the heating operation. Or, the discharge temperature To tends to be smaller than the _suction temperature _Ti . Therefore, in step _S22 , when the air conditioner 11 is instructed to perform heating operation and the temperature difference (To − _Ti ) is smaller than a predetermined threshold value, the operation status is other than the heating operation. It is judged that it is. The threshold value can be set as appropriate. The threshold value of this embodiment can be set in the range of −5 ° C. to + 5 ° C. (0 ° C. in this embodiment).

As shown in FIG. 4, when it is determined in step S22 that the air conditioner 11 is in an operating condition different from the instructed operating operation (“Y” in step S22), the air volume reducing step S23 and After the air volume reduction step S23, a step S24 for determining whether or not the air conditioner 11 (shown in FIG. 1) has reached the instructed operating condition is performed.

In step S22, when it is determined that the air conditioner 11 is in the instructed operating condition (that is, the operating condition is not different from the instructed operating operation) (“N” in step S22), the air conditioning operation is stopped. Step S26 for determining the presence / absence of the instruction is carried out.

In the air volume lowering step S23, the air volume of the fan 12 (shown in FIGS. 1 and 2) is relatively reduced. The air volume reduction step S23 is performed by the calculation unit 31 shown in FIG. 2 executing the air volume adjustment unit 43 of the program unit 38.

In the air volume reduction step S23 of the present embodiment, the calculation unit 31 transmits a signal for reducing the air volume to the fan 12 (shown in FIGS. 1 and 2). In the present embodiment, the air volume of the fan 12 is changed from the first air volume to the second air volume. As a result, in the air conditioning method (air conditioning device 10) of the present embodiment, the air volume of the fan 12 can be made relatively small by the air volume reducing step S23 (air volume adjusting unit 43). The air A4 (air that was not originally intended) air-conditioned by the air conditioner 11 in different operating conditions can be suppressed from being supplied to the space 3, and the comfort is not impaired.

Further, in the air conditioning method (air conditioning device 10) of the present embodiment, it is easy to determine whether or not the air conditioner 11 is in an operating condition different from the instructed operating operation based on the temperature difference (To − _{Ti )} . Therefore, for example, a dedicated machine capable of transmitting the operating condition to the control means 13 and a high degree of customization of the communication means of the air conditioner 11 are not required. Therefore, in the air conditioning method (air conditioning device 10) of the present embodiment, since the general-purpose air conditioner 11 can be used, it can be introduced at low cost and is excellent in maintainability.

Next, in step S24, it is determined whether or not the air conditioner 11 has reached the instructed operating condition after the air volume reduction step S23. The step S24 is performed by the calculation unit 31 shown in FIG. 2 executing the determination unit 41 of the program unit 38.

In the present embodiment, when it is determined that the air conditioner 11 has reached the instructed operating condition, the air conditioner 11 is in the other operating condition (for example, heating operation or cooling) even though the cooling operation is instructed. The case where the cooling operation is returned to after the air volume lowering step S23 is included. Furthermore, when it is determined that the instructed operating condition has been reached, the operating condition is other than that (for example, the cooling operation or the heating operation is stopped) even though the heating operation is instructed. , The case where the heating operation is returned after the air volume reduction step S23 is included.

Whether or not the air conditioner 11 has reached the instructed operating condition can be appropriately determined. In step S24 of the present embodiment, similarly to step _S22 for determining whether or not the air conditioner 11 is in an operating condition different from the instructed operating operation, based on the temperature difference (To − _Ti ), It is possible to determine whether or not the air conditioner 11 has reached the instructed operating condition.

When the air conditioner 11 returns to the instructed cooling operation, the discharge temperature To becomes smaller than the _suction temperature _Ti as compared with the case of the operation condition other than the instruction (for example, the heating operation or the cooling operation is stopped). Therefore, in step S24, the air conditioner 11 is instructed when the air conditioner 11 is instructed to perform cooling operation and when the temperature difference (To − _Ti ) is _equal to or less than a predetermined threshold value. It is judged that the operation status (cooling operation) has been restored. The threshold value can be set, for example, in the above range.

On the other hand, when the air conditioner 11 returns to the instructed heating operation, the discharge temperature To is larger than the _suction temperature _Ti as compared with the case of the operation condition other than the instruction (for example, the cooling operation or the heating operation is stopped). Become. Therefore, in step S24, the air conditioner 11 is instructed when the air conditioner 11 is instructed to perform heating operation and when the temperature difference (To − _Ti ) is _equal to or greater than a predetermined threshold value. It is judged that the operating condition (heating operation) has been restored. The threshold value can be set, for example, in the above range.

As shown in FIG. 4, in step S24, when it is determined that the air conditioner 11 is in the instructed operating condition after the air volume reduction step S23 (“Y” in step S24), the air volume of the fan 12 is determined. The air volume increasing step S25 for relatively increasing the air volume is carried out.

In step S24, when it is determined that the air conditioner 11 is not in the instructed operating condition after the air volume reduction step S23 (“N” in step S24), the step S24 is performed again. As a result, in the air conditioning process S2, the air volume of the fan 12 is set to be relatively small until the air conditioner 11 reaches the instructed operating condition, so that air that is not originally intended is supplied to the space 3. It can be surely suppressed.

Next, in the air volume increasing step S25, the air volume of the fan 12, which has been reduced, is relatively increased. In the air volume increasing step S25, the calculation unit 31 shown in FIG. 2 is performed by executing the air volume adjusting unit 43 of the program unit 38.

In the air volume increasing step S25 of the present embodiment, the calculation unit 31 transmits a signal for relatively increasing the air volume to the fan 12 (shown in FIG. 1). In the present embodiment, the air volume of the fan 12 is changed from the second air volume to the first air volume. As a result, in the air conditioning method (air conditioner 10) of the present embodiment, the air volume of the fan 12 can be relatively increased by the air volume increasing step S25 (air volume adjusting unit 43), so that the air conditioning is performed under the instructed operating condition. The generated air A4 (shown in FIG. 1) can be positively supplied to the space 3, and the comfort in the space 3 can be enhanced.

Next, in step S26, it is determined whether or not there is an instruction to stop the air conditioning operation. Step S26 is performed by the calculation unit 31 shown in FIG. 2 executing the determination unit 41 of the program unit 38. The determination as to whether or not there is an instruction to stop the air conditioning operation is performed, for example, based on the instruction information for stopping the air conditioning operation (heating operation or cooling operation) input by the resident or the like to the input means 34.

When it is determined in step S26 that there is an instruction to stop the air conditioning operation (“Y” in step S26), the step S27 for stopping the air conditioning operation by the air conditioner 11 is carried out, and a series of processes in the air conditioning step S2 is performed. finish.

On the other hand, if it is determined in step S26 that there is no instruction to stop the air conditioning operation (for example, there is an instruction to start the air conditioning operation) (“N” in step S26), steps S22 to S26 are performed again. As a result, in the air conditioning process S2, the air conditioning of the space 3 can be continuously performed until the instruction to stop the air conditioning operation is given.

In step S27, the air conditioning operation by the air conditioner 11 is stopped. In step S27, the calculation unit 31 shown in FIG. 2 is executed by executing the air conditioning operation start / stop unit 42 of the program unit 38.

In step S27, the calculation unit 31 transmits a signal for stopping the air conditioning operation to the air conditioner 11. As a result, in step S27, the air conditioning operation by the air conditioner 11 can be stopped. Further, in the step S27 of the present embodiment, the calculation unit 31 transmits a signal for reducing the air volume to the fan 12. The air volume of the fan 12 of the present embodiment is set to a relatively small second air volume. As a result, the fan 12 can supply the outside air A1 (underfloor air A2) to the space 3 and ventilate the space 3 while circulating the air A3 in the space 3.

As shown in FIG. 3, in step S3, it is determined whether or not there is an instruction to end the air conditioning method. In step S1, the calculation unit 31 shown in FIG. 2 is executed by executing the determination unit 41 included in the program unit 38. Whether or not there is an instruction to end the air conditioning method is determined based on, for example, the instruction information input by the resident or the like to the input means 34 or the occurrence of an abnormal termination such as interrupt processing.

When it is determined in step S3 that there is an instruction to end the air conditioning method (“Y” in step S3), a series of processes of the air conditioning method is completed. On the other hand, if it is determined in step S1 that there is no instruction to end the air conditioning method (“N” in step S3), steps S1 to S3 are carried out again. As a result, in the air conditioning method, the space 3 inside the building can be air-conditioned based on the instructions of the resident or the like until the end instruction is given.

Next, the air-conditioning method (air-conditioning device 10) of another embodiment of the present invention will be described. In the air-conditioning method (air-conditioning device 10) of this embodiment, the presence or absence of abnormality in the air conditioner 11 (shown in FIG. 1) is determined while air-conditioning the space 3 (shown in FIG. 1) in the building 2.

The abnormality of the air conditioner 11 includes, for example, a refrigerant leak leading to a decrease in air conditioning capacity, a defect in the installed state of the indoor unit 11A and the outdoor unit (not shown), and the like. FIG. 5 is a conceptual diagram showing an example of the configuration of the control means 13 according to another embodiment of the present invention. In this embodiment, the same configurations as those in the previous embodiments are designated by the same reference numerals, and the description thereof may be omitted.

As shown in FIG. 5, the air conditioner 10 of this embodiment includes an exhaust humidity detecting means 44 and a suction humidity detecting means 45.

The exhaust humidity detecting means 44 is for detecting the humidity X _o of the air discharged from the discharge port 24 (shown in FIG. 1) of the indoor unit 11A (hereinafter, may be simply referred to as “discharge humidity”). be. The exhaust humidity _Xo detected in this embodiment is exemplified as a relative humidity, but may be an absolute humidity. The exhaust humidity detecting means 44 of this embodiment is configured as a humidity sensor (not shown) attached near the discharge port 24 of the indoor unit 11A.

The suction humidity detecting means 45 is for detecting the humidity (hereinafter, may be simply referred to as “suction humidity”) _Xi of the air supplied to the suction port 23 (shown in FIG. 1) of the indoor unit 11A. be. The suction humidity _Xi detected in this embodiment is exemplified as a relative humidity, but may be an absolute humidity. The suction humidity detecting means 45 of this embodiment is configured as a humidity sensor (not shown) attached near the suction port 23 of the indoor unit 11A.

As shown in FIG. 5, the exhaust humidity detecting means 44 and the suction humidity detecting means 45 are connected to the calculation unit 31. As a result, the calculation unit 31 transmits a signal to the exhaust humidity detecting means 44 and the suction humidity detecting means 45, so that the humidity of the air discharged from the discharge port 24 of the indoor unit 11A shown in FIG. 1 and the room It is possible to detect the humidity of the air supplied to the suction port 23 of the machine 11A and transmit the detection results to the calculation unit 31.

As shown in FIG. 5, the program unit 38 of this embodiment further includes an actual air conditioning capacity calculation unit 47 and an abnormality determination unit 48. The actual air conditioning capacity calculation unit 47 is for calculating the actual air conditioning capacity of the air conditioner 11 based on the operating condition of the air conditioner 11 (shown in FIG. 1). The abnormality determination unit 48 is for determining the presence or absence of an abnormality in the air conditioner 11 based on the actual air conditioning capacity and the expected capacity of the air conditioner 11. Details of the functions of these programs will be described in the air conditioning step S2 described later.

FIG. 6 is a flowchart showing an example of the processing procedure of the air conditioning step S2 according to another embodiment of the present invention. In the air conditioning step S2 of this embodiment, the air conditioner 11 instructs between the step S21 for starting the air conditioning operation and the step S27 for stopping the air conditioning operation in order to determine the presence or absence of an abnormality in the air conditioner 11. Steps S28 to S30 are carried out at the timing of air conditioning under the above-mentioned operating conditions.

In step S28, the actual air conditioning capacity of the air conditioner 11 is calculated based on the operating condition of the air conditioner 11. In step S28, the calculation unit 31 shown in FIG. 5 is executed by executing the actual air conditioning capacity calculation unit 47 of the program unit 38.

The actual air conditioning capacity can be appropriately calculated based on the conventional method. In this embodiment, during the cooling operation, the actual air conditioning capacity q _C during the cooling operation based on the following formula (1) is calculated, and during the heating operation, the actual air conditioning capacity q _H during the heating operation based on the following formula (2) is calculated. It is calculated.

ここで、
ｑ_C：実空調能力（冷房）（Ｗ）
Ｖ：空気調和機の設定風量（ｍ³／sec）
Ｔ_ｉ：吸込温度（℃）
Ｔ_ｏ：排出温度（℃）
Ｘ_ｉ：吸込湿度（kg/kg’）
Ｘ_ｏ：排出湿度（kg/kg’）
ｈ_i,C：吸込エンタルピー（ｋJ/kg’）
ｈ_o,C：排出エンタルピー（ｋJ/kg’）

here,
q _C : Actual air conditioning capacity (cooling) (W)
V: Air conditioner set air volume (m ³ / sec)
_Ti : Suction temperature (° C)
To: Discharge temperature ( _° C)
X _i : Suction humidity (kg / kg')
X _o : Exhaust humidity (kg / kg')
h _{i, C} : Suction enthalpy (kJ / kg')
_{ho, C} : Emission enthalpy (kJ / kg')

ここで、変数については、以下を除いて、上記式（１）と同一である。
ｑ_H：実空調能力（暖房）（Ｗ）
ｈ_i,H：吸込エンタルピー（ｋJ/kg’）
ｈ_o,H：排出エンタルピー（ｋJ/kg’）

Here, the variables are the same as the above equation (1) except for the following.
q _H : Actual air conditioning capacity (heating) (W)
h _{i, H} : Suction enthalpy (kJ / kg')
_{ho, H} : Emission enthalpy (kJ / kg')

As shown in the above equations (1) and (2), the operating conditions of the air conditioner 11 (shown in FIG. 1) (in this embodiment, the set air volume V, the suction temperature _Ti , and the exhaust temperature of the air conditioner 11). Based on _To , suction humidity X _i and exhaust humidity X _o ), the actual air conditioning capacity q _C during cooling operation and the actual air conditioning capacity q _H during heating operation can be calculated. The set air volume V can be acquired by the calculation unit 31 shown in FIG. 5 by transmitting a signal to the air conditioner 11. The suction temperature _Ti and the discharge temperature _To can be acquired by the calculation unit 31 transmitting signals to the suction temperature detection means 16 and the discharge temperature detection means 15. The suction humidity _Xi and the discharge humidity _Xo can be acquired by the calculation unit 31 transmitting signals to the suction humidity detecting means 45 and the discharge humidity detecting means 44.

In the above formulas (1) and (2), the suction humidity X _i and the discharge humidity X _o are absolute humidity. Therefore, when the acquired suction humidity X _i and discharge humidity X _o are relative humidity, for example, the suction temperature _Ti , the discharge temperature To, and the relative humidity suction humidity X are based on the equation of _SONNTAG . It is possible to easily convert _i and the discharge humidity X _o into the suction humidity X _i and the discharge humidity X _o of the absolute humidity.

In the heating operation, the air supplied to the _suction port 23 (shown in FIG. 1) of the indoor unit 11A is not _dehumidified . good. Further, the actual air conditioning capacity q _H during heating can be calculated by the following formula (3) instead of the above formula (2).

ここで、変数については、上記式（１）と同一である。

Here, the variables are the same as the above equation (1).

As described above, in the step S28, the actual air conditioning capacity of the air conditioner 11 can be calculated based on the operating condition of the air conditioner 11. The calculation result is stored in the data unit 37 (shown in FIG. 5) of the storage unit 32.

Next, in step S29, the presence or absence of abnormality in the air conditioner 11 is determined based on the actual air conditioning capacity and the expected capacity of the air conditioner 11. In step S29, the calculation unit 31 shown in FIG. 5 is executed by executing the abnormality determination unit 48 of the program unit 38.

In step S29, first, the expected capacity of the air conditioner 11 is required. Expected ability can be appropriately obtained based on the conventional method. For example, when the air conditioner 10 can detect the temperature of the outside air, the air conditioning capacity characteristic of the air conditioner 11 specified from the temperature of the outside air can be treated as the expected capacity. In order to easily specify such expected capacity, a calculation formula, a graph, or a graph showing the relationship between the temperature of the outside air and the air conditioning capacity characteristic of the air conditioner 11 is displayed in the data unit 37 (shown in FIG. 5). It is desirable that the table is entered in advance.

On the other hand, when the temperature of the outside air cannot be detected, the rated capacity (rated cooling capacity and rated heating capacity) defined in the air conditioner 11 can be treated as the expected capacity. As the expected capacity, the expected capacity Q _C during the cooling operation or the expected capacity Q _H during the heating operation is required according to the operating condition (cooling operation or heating operation) of the air conditioner 11. The expected capacity Q _C during the cooling operation and the expected capacity Q _H during the heating operation are stored in the data unit 37 (shown in FIG. 5).

Next, in step S29, the ratio between the actual air conditioning capacity and the expected capacity is required. During the cooling operation, the ratio q _C / Q _C of the actual air conditioning capacity q _C and the expected capacity Q _C is required. During the heating operation, the ratio q _H / Q _H of the actual air conditioning capacity q _H and the expected capacity Q _H is required.

If the actual air-conditioning capacities q _C and q _H are lower than the expected capacities Q _C and Q _H , the air conditioner 11 is not capable of the original air-conditioning operation, and therefore some abnormality (for example, refrigerant leakage) occurs in the air conditioner 11. It can be presumed that there is a problem with the installation condition, etc.). Therefore, when the ratio of the actual air conditioning capacity to the expected capacity (cooling operation: q _C / Q _C , heating operation: q _H / Q _H ) is equal to or less than a predetermined threshold value, the air conditioner 11 It can be determined that there is something wrong with the air conditioner. The threshold value can be appropriately set according to, for example, the type of the air conditioner 11 and the installation environment. The threshold value is preferably set to an arbitrary numerical value (0.8 in this example) from 0.7 to 1.0, for example.

In step S29, when the ratio of the actual air conditioning capacity to the expected capacity (cooling operation: q _C / Q _C , heating operation: q _H / Q _H ) is equal to or less than the threshold value (0.8 in this example). (“Y” in step S29), it is determined that the air conditioner 11 has an abnormality. In this case, as shown in FIG. 6, it is notified that the air conditioner 11 has an abnormality (step S30). The notification of this abnormality may be displayed on the output means 35, for example, or notified to the maintenance center or the like that maintains the air conditioner 11 via a server (cloud server) connected via the Internet or the like. May be done. After notifying the abnormality, the air conditioning process S2 may be continued as it is, or the air conditioning process S2 may be forcibly terminated.

In step S29, when the ratio of the actual air conditioning capacity to the expected capacity (q _C / Q _C during cooling operation, q _H / Q _H during heating operation) is larger than the threshold value (0.8 in this example). (“N” in step S29), it is determined that there is no abnormality in the air conditioner 11. In this case, step S26 for determining whether or not there is an instruction to stop the air conditioning operation is carried out.

As described above, the air conditioning method (air conditioner 10) of this embodiment can determine the presence or absence of an abnormality in the air conditioner 11 while air-conditioning the space 3 (shown in FIG. 1) in the building 2. The air conditioner 11 can be quickly maintained. Therefore, the air-conditioning method (air-conditioning device 10) of this embodiment can maintain the comfort of the space 3 inside the building 2 for a long period of time.

Although the particularly preferred embodiment of the present invention has been described in detail above, the present invention is not limited to the illustrated embodiment and can be modified into various embodiments.

The air conditioner shown in FIGS. 1 and 2 was installed in the building (Example). In the control device of the embodiment, the air conditioning of the space of the building was performed based on the procedure of FIGS. 3 and 4. Then, it was verified whether or not the air volume of the fan could be made relatively small when the air conditioner was in an operating condition different from the instructed operating operation. The specifications of the examples are as follows.

Air conditioning period: March 8th to March 9th Operation of air conditioner: Heating fan: 1st air volume: 1140m ³ / h
2nd air volume: 300m ³ / h
Temperature difference (To-Ti) threshold: _{0 °} C

As a result of the test, in the embodiment, when the air conditioner is in an operating condition (defrost operation) different from the instructed operating operation, the air volume of the fan can be relatively reduced (set to the second air volume). rice field. Therefore, in the embodiment, it was possible to suppress the supply of air that was not originally intended to the inside of the building, and it was possible to air-condition the inside of the building without impairing the comfort.

3 Space 11 Air conditioner 12 Fan

Claims (10)

It ’s a way to air-condition the space inside the building.
The operation of the air conditioner includes an air-conditioning step of supplying air-conditioned air to the space by a fan provided separately from the air conditioner.
The air conditioning process is
A step of determining whether or not the air conditioner is in an operating condition different from the instructed operating operation, and
Including an air volume reducing step of relatively reducing the air volume of the fan when it is determined that the operating condition is different from the instructed operating operation.
The operating conditions different from the instructed operating operation include other operating conditions even though the air conditioner is instructed to perform cooling operation, and the air conditioner is instructed to perform heating operation. Including other driving conditions regardless
The process of making the above judgment is
When the heating operation is instructed to the air conditioner, the temperature To of the air discharged from the discharge port of the indoor unit of the air conditioner and the temperature Ti of the air supplied to the suction port of the indoor unit When the temperature difference (To-Ti) is smaller than 0 ° C. , it is judged that the operation status is other than that even though the heating operation is instructed.
When the air conditioner is instructed to perform the cooling operation, when the temperature difference (To-Ti) is larger than 0 ° C. , the operating conditions are other than the above, even though the cooling operation is instructed. to decide,
How to air-condition the building.
The air conditioning method for a building according to claim 1, further comprising an air volume increasing step of relatively increasing the air volume of the fan when the air conditioner reaches the instructed operating condition after the air volume decreasing step. .. Although the heating operation is instructed, the other operating conditions are the operations in which the cooling operation is temporarily performed.
The method for air-conditioning a building according to claim 1 or 2, wherein the other operating conditions are the operation in which the heating operation is temporarily performed even though the cooling operation is instructed .
A process of calculating the actual air conditioning capacity of the air conditioner based on the operating condition of the air conditioner, and
The air conditioning of a building according to any one of claims 1 to 3, further comprising a step of determining the presence or absence of an abnormality in the air conditioner based on the actual air conditioning capacity and the expected capacity of the air conditioner. Method. The method for air-conditioning a building according to claim 4, wherein when the ratio of the actual air-conditioning capacity to the expected capacity is equal to or less than a predetermined threshold value, it is determined that the air conditioner has an abnormality . A device for air-conditioning the space inside a building.
With an air conditioner,
A fan provided separately from the air conditioner and supplying air conditioned by the air conditioner to the space.
A control means for controlling the fan and
Discharge temperature detecting means for detecting the temperature To of the air discharged from the discharge port of the indoor unit of the air conditioner, and
The suction temperature detecting means for detecting the temperature Ti of the air supplied to the suction port of the indoor unit is included.
The control means is
A determination unit for determining whether or not the air conditioner is in an operating condition different from the instructed operating operation, and
It includes an air volume adjusting unit that relatively reduces the air volume of the fan when it is determined that the operating condition is different from the instructed operating operation.
The operating conditions different from the instructed operating operation include other operating conditions even though the air conditioner is instructed to perform cooling operation, and the air conditioner is instructed to perform heating operation. Including other driving conditions regardless
The judgment unit
When the heating operation is instructed to the air conditioner, the temperature difference (To—Ti) between the temperature To of the discharged air and the temperature Ti of the supplied air is smaller than 0 ° C. , Even though the heating operation is instructed, it is judged that the operation status is other than that.
When the air conditioner is instructed to perform the cooling operation, when the temperature difference (To-Ti) is larger than 0 ° C. , the operating conditions are other than the above, even though the cooling operation is instructed. to decide,
Building air conditioner.
The sixth aspect of the present invention, wherein the air volume adjusting unit relatively reduces the air volume of the fan and then relatively increases the air volume of the fan when the air conditioner reaches the instructed operating condition. Building air conditioner . Although the heating operation is instructed, the other operating conditions are the operations in which the cooling operation is temporarily performed.
The air conditioner for a building according to claim 6 or 7, wherein the other operating conditions are the operations in which the heating operation is temporarily performed even though the cooling operation is instructed . The control means includes an actual air conditioning capacity calculation unit that calculates the actual air conditioning capacity of the air conditioner based on the operating status of the air conditioner.
The building according to any one of claims 6 to 8, further including an abnormality determination unit for determining the presence or absence of an abnormality in the air conditioner based on the actual air conditioning capacity and the expected capacity of the air conditioner. Air conditioner. The building according to claim 9, wherein the abnormality determination unit determines that the air conditioner has an abnormality when the ratio of the actual air conditioning capacity to the expected capacity is equal to or less than a predetermined threshold value. Air conditioner.

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