JP5818620B2 - Air conditioning system - Google Patents

Description

  The present invention relates to an air conditioning system.

  A refrigerant-type air conditioner used for air conditioning of a conditioned space includes an outdoor unit having a compressor, a four-way valve, and an outdoor heat exchanger, and an indoor unit having a decompression device and an indoor heat exchanger. Then, a compressor, a four-way valve, a condenser, a pressure reducing device, and an evaporator are sequentially connected by piping to form a refrigerant circuit, and heating or cooling is performed by circulating the refrigerant in the piping of the refrigerant circuit.

  There are so-called cassette type and duct type in indoor units of this type of air conditioner (see, for example, Patent Document 1 and Patent Document 2). In the cassette type indoor unit, the indoor unit is embedded in a ceiling or the like, and temperature-controlled air is blown into the room from an outlet provided on the lower surface of the indoor unit. On the other hand, a duct type indoor unit has an indoor unit installed behind the ceiling, extends the duct from the indoor unit to the air outlet provided in the ceiling, and blows temperature-controlled air into the room through the duct and the air outlet. .

  When air-conditioning a large space using these cassette-type and duct-type air conditioners, a plurality of cassette-type indoor units are distributed and arranged on the ceiling at appropriate intervals, or connected to duct-type indoor units. Similarly, a plurality of air outlets are arranged on the ceiling with appropriate intervals. In such an arrangement, temperature-controlled air is blown indoors from various places on the ceiling, so that the temperature distribution in the large space is uniform and comfortable air conditioning is provided.

Japanese Patent No. 4704226 (FIG. 1) JP-A-10-267320 (page 3, FIG. 1)

  When air-conditioning a large space as described above, in a cassette type indoor unit, the indoor unit itself is distributed and arranged at an appropriate interval on the ceiling, so it is necessary to install refrigerant piping from each outdoor unit installation position to each indoor unit There is. Therefore, in indoor units that are far from the installation position of the outdoor unit, the refrigerant piping must be long, and if the refrigerant piping is long, the pressure loss of the refrigerant also increases, so compared to the short case As a result, the compressor input increases and the loss increases. Therefore, there is a problem that the efficiency is lowered when viewed as the whole system.

  On the other hand, in the case of the duct type, there is only one place where the indoor unit is installed. Therefore, the indoor unit may be installed at a place near the outdoor unit, and there is no problem that the refrigerant pipe becomes long. However, it is necessary to extend the duct from the indoor unit to each outlet. For this reason, if the harmonized space is a large space and the total distance of the ducts to each outlet becomes long, the duct pressure loss increases accordingly. Therefore, it is necessary to increase the external static pressure on the indoor unit side, and the input of the indoor fan of the indoor unit for sending air into the duct is larger than when the total distance of the duct is short. Therefore, in the case of the duct type as well as the cassette type, there is a problem that the loss increases and the efficiency of the system decreases.

  In recent years, a technique has been proposed that efficiently eliminates temperature unevenness in the room by using an air conveyance fan that circulates room air in combination with an air conditioner. As described above, although the combined use of the air conveyance fan has been studied, it has not yet been studied to effectively control the air conveyance fan with a view to reducing the power consumption.

  The present invention has been made to solve the above problems, and provides an air conditioning system that can realize comfortable air conditioning in a large space with low power consumption by using an air conditioning device and an air conveyance fan in combination. The purpose is to do.

An air conditioning system according to the present invention includes an outdoor unit and a perimeter of temperature-adjusted air that is collected and arranged in a perimeter zone that is a zone on one side of the wall of a wall to be conditioned. An air conditioner that has one or more indoor units that blow out to the zone, and that forms a refrigerant circuit between the outdoor unit and the indoor unit to perform at least one of a cooling operation or a heating operation; A plurality of air transport fans which are arranged on the ceiling and transport air toward the far side zone opposite to the perimeter zone in the conditioned space; and a control device which controls the air conditioner and the air transport fan. The air transport fans are arranged at intervals in the direction from the perimeter zone toward the back zone, and the control device is coupled with the operation of the air conditioner to Air volume Les is one whose position is to be operated so as to be smaller in the order toward the far side zone side from Perimeter zone side.

  ADVANTAGE OF THE INVENTION According to this invention, the air conditioning system which can implement | achieve comfortable air conditioning in large space with low power consumption can be obtained.

(A) is a top view of the room to which the air conditioning system which concerns on Embodiment 1 of this invention was applied, (b) is a side view of Fig.1 (a). It is explanatory drawing of the duct type indoor unit of FIG. It is a figure which shows the structure of the refrigerant circuit of the air conditioning apparatus of FIG. It is a flowchart which shows operation | movement of the air conditioning system which concerns on Embodiment 1 of this invention. It is explanatory drawing of the cooling operation of the air conveyance fan of FIG. It is explanatory drawing of the driving | operation for heating of the air conveyance fan of FIG.

Embodiment 1 FIG.
Fig.1 (a) is a top view of the room where the air conditioning system which concerns on Embodiment 1 of this invention was applied, FIG.1 (b) is a side view of Fig.1 (a). The arrows in FIGS. 1A and 1B indicate the blowing direction. FIG. 2 is an explanatory diagram of the duct-type indoor unit of FIG. In FIG. 1, FIG. 2, and the figure mentioned later, what attached | subjected the same code | symbol is the same or it corresponds, and this is common in the whole text of a specification.
The air conditioning system 1 includes an air conditioning apparatus 10 and a plurality of air transport fans 50, and is a system that performs air conditioning of the same conditioned space. The air conditioner 10 includes an outdoor unit 20 and a plurality of indoor units 30, and the outdoor unit 20 and the plurality of indoor units 30 are connected by a refrigerant pipe 40 and are capable of performing a cooling operation and a heating operation ( (To be described later).

  The indoor unit 30 may be either a cassette type or a duct type, and FIG. 1 shows an example in which two cassette type indoor units 30A and one duct type indoor unit 30B coexist. In the cassette-type indoor unit 30A, an opening provided on the lower surface of the indoor unit housing serves as a blowout port 31A, and temperature-controlled air is blown out from the blowout port 31A to the conditioned space. Further, in the duct type indoor unit 30B, as shown in FIG. 2, the duct 32 is extended from the indoor unit 30B to the outlet 31B provided on the ceiling, and the temperature-controlled air blown out from the indoor unit 30B is passed through the duct 32. It blows out from the blower outlet 31B to the harmonized space. In addition, each apparatus installed in the indoor unit 30 and the outdoor unit 20 in FIG. 2 will be described later.

  The air conditioning system 1 according to the first embodiment is devised in terms of the arrangement of the indoor unit 30A, the arrangement of the air outlet 31B that blows out the temperature-controlled air, the arrangement of the air transfer fan 50, and the operation method thereof. It is a system that realizes a comfortable harmonized space with uniform temperature distribution with low power consumption. In the following, the basic concept for constructing such a system will be described first.

  First, regarding the arrangement of the plurality of indoor units 30, as described above, in order to make the temperature distribution in the conditioned space uniform, a plurality of cassette-type indoor units 30 are distributed and arranged in the tuned space, or the duct type If a plurality of outlets 31B in the indoor unit 30B are distributed and arranged in the conditioned space, the refrigerant pipe 40 becomes longer and the duct 32 becomes longer, resulting in a decrease in the efficiency of the air conditioning system 1 as a whole. Resulting in. For this reason, in the air conditioning system 1 according to the first embodiment, a plurality of indoor units 30 are collectively installed in a specific zone, whether the cassette type or the duct type. Thereby, shortening of the refrigerant | coolant piping 40 is achieved. In addition, the air outlets 31B in the duct type indoor unit 30B are also arranged in the specific zone without being distributed in the harmonized space. Thereby, shortening of the duct 32 is also achieved. Therefore, after all, all of the indoor unit 30A, the indoor unit 30B, and the outlet 31B are collectively installed in a specific zone.

  And since the outdoor unit 20 is usually installed facing the outer wall, if the specific zone is, for example, the center of the room, the length of the refrigerant pipe 40 between the outdoor unit 20 is increased. Therefore, the arrangement position of the indoor unit 30 is set as a wall-side zone of the harmonized space. The wall-side zone is, for example, a space within about 4 m from the wall side, and the air outlets 31A and 31B of the indoor units 30 are provided on the ceiling of any one of the wall-side zones. Specifically, the wall-side zone of any one of the wall-side zones is particularly preferably the wall side on which the window 2 is disposed. The wall-side zone near the window 2 is particularly susceptible to thermal influences from the outside air, and the air conditioning load is particularly large. Therefore, air outlets 31A and 31B are provided at this position so that temperature-controlled air is concentrated and blown out. This is because the air conditioning load can be processed efficiently. Hereinafter, one of the wall-side zones on one wall side is referred to as a perimeter zone.

  As described above, the plurality of indoor units 30 are collectively installed and the positions of the outlets 31A and 31B are also integrated into the perimeter zone, so that the explanation is repeated, but the refrigerant pipe 40 and the duct 32 can be shortened. Therefore, improvement in the efficiency of the entire system can be expected, and as a result, improvement in energy saving can be expected. However, by combining the air outlets 31A and 31B into the perimeter zone, the temperature of the far side zone (hereinafter referred to as the back side zone) far from the perimeter zone cannot be sufficiently adjusted, and the temperature distribution of the conditioned space is It becomes non-uniform. Therefore, a plurality of air conveyance fans 50 are provided so that such non-uniformity does not occur, and the temperature-controlled air blown from the outlets 31A and 31B of the perimeter zone is transferred to the back zone by the plurality of air conveyance fans 50. Also reach. Thereby, even in a large space, it is possible to create a comfortable environment by equalizing the temperature distribution in the room.

  In the air conditioning system 1 of the present embodiment, the arrangement of the air conveyance fan 50 and the operation method thereof are also characterized, which will be described later.

Now that the basic concept for configuring the air conditioning system 1 has been clarified, the description returns to FIG.
In FIG. 1, reference numeral 2 denotes a window, and a plurality of indoor units 30 are aggregated and installed behind the perimeter zone near the window 2. Moreover, the outdoor unit 20 is installed in an outdoor part close to the installation area of the indoor unit 30.

  Further, the air outlet 31A of the indoor unit 30A and the air outlet 31B of the indoor unit 30B are also arranged in the perimeter zone, and temperature-controlled air whose temperature is adjusted inside the indoor unit 30 is blown out to the perimeter zone. .

  The air conveyance fan 50 is a so-called circulator or the like, and is installed in a ceiling portion. The air conveyance fan 50 sucks and blows out air in the vicinity of the ceiling to blow indoor air so that the room temperature becomes uniform. The blowing direction can be adjusted, and it can be blown substantially horizontally as shown in FIG. 1B, or can be blown obliquely downward as shown in FIG. The air conveying fan 50 is a fan driven by a motor, and the air volume can be varied by controlling the rotation speed of the motor by means such as inverter control.

Next, the arrangement of the air conveyance fan 50 will be described.
The plurality of air transport fans 50 are spaced in the direction from the perimeter zone toward the back zone so that the temperature-controlled air blown from the air outlets 31A and 31B to the perimeter zone can efficiently reach the back zone. It is arranged in the space. By adopting this arrangement, the temperature-controlled air blown to the perimeter zone can efficiently reach the back zone while being relayed by a plurality of air transfer fans 50.

  In FIG. 1, air conveyance fans 50A are arranged in four rows and one row along the perimeter zone, and four rows and one row are similarly arranged at intervals in the blowing direction side (back zone side) of the air conveyance fan 50A. The air conveyance fan 50B is disposed in the air conveyance fan 50B, and the air conveyance fan 50C is arranged in a row in the same manner at intervals in the air blowing direction side (back side zone side) of the air conveyance fan 50B. . What is necessary is just to change suitably the installation number of the air conveyance fans 50 according to the magnitude | size of the space to be harmonized. Note that the air conditioning system 1 is intended for a large space where it is difficult to make the room temperature uniform with only one indoor unit as the conditioned space. What is necessary is just to arrange | position at intervals toward a back zone from a meter zone. The number of indoor units 30 installed in the air conditioning system 1 is not limited to a plurality of units, and may be one. Therefore, the minimum configuration of the air conditioning system 1 is one indoor unit and two air transfer fans.

  The air conditioning system 1 is further provided with a control device 3 that controls the entire air conditioning system 1. FIG. 1 illustrates a configuration in which the control device 3 is provided only in the outdoor unit 20. However, each indoor unit 30 is provided with an indoor control device having a part of the function of the control device 3. You may make it the structure which performs a cooperation process by performing data communication between indoor control apparatuses.

  The indoor unit 30 and the air conveyance fan 50 are connected to the control device 3 by a communication line (not shown). The control device 3 performs switching between the cooling operation and the heating operation of the air conditioner 10, or the ON / OFF control, the air volume control, and the blowing direction of the air conveyance fan 50 in conjunction with the cooling operation or the heating operation of the air conditioner 10. Control. The control device 3 also detects a temperature difference ΔT (= | T0−T1) between the set temperature T0 set by the user-operable remote controller 4 and the suction temperature T1 detected by the suction temperature detection device 33 provided in the indoor unit 30. The air conditioner 10 is controlled to reduce |).

FIG. 3 is a diagram illustrating a configuration of a refrigerant circuit of the air-conditioning apparatus of FIG.
The air conditioner 10 includes a compressor 21, a four-way valve 22, an outdoor heat exchanger 23, an expansion valve 34 as a pressure reducing device, and an indoor heat exchanger 35 that are sequentially connected by piping so that the refrigerant circulates. It has a circuit. The air conditioner 10 further includes an outdoor fan 24 that sucks outside air into the outdoor unit 20 and exchanges heat with the refrigerant in the outdoor heat exchanger 23, and air is sucked into the indoor unit 30 and refrigerant in the indoor heat exchanger 35. And an indoor fan 36 that controls the temperature by exchanging heat with the air and supplies the indoor air as temperature-controlled air. The outdoor unit 20 includes a compressor 21, a four-way valve 22, an outdoor heat exchanger 23, and an outdoor fan 24. The indoor unit 30 includes an expansion valve 34, an indoor heat exchanger 35, and an indoor fan 36. Yes.

  The air conditioner 10 configured as described above can perform a cooling operation or a heating operation by switching the four-way valve 22, and when the four-way valve 22 is switched to the solid line side in FIG. When the evaporator and the outdoor heat exchanger 23 become a condenser and the cooling operation is performed, and the four-way valve 22 is switched to the dotted line side in FIG. 3, the indoor heat exchanger 35 becomes a condenser and the outdoor heat exchanger 23 becomes an evaporator. Heating operation is performed. Here, the air conditioner 10 is configured to be capable of both the cooling operation and the heating operation here, but it is sufficient that at least one of the operations can be performed. Therefore, the four-way valve 22 is not necessarily an essential configuration. It can be omitted.

(Cooling operation)
In the air conditioner 10, during the cooling operation, the refrigerant compressed by the compressor 21 becomes a high-temperature and high-pressure gas refrigerant, which is sent to the outdoor heat exchanger 23 through the four-way valve 22. The refrigerant flowing into the outdoor heat exchanger 23 is liquefied by exchanging heat with the outdoor air conveyed by the outdoor fan 24 and dissipating heat. The liquefied refrigerant is decompressed by the expansion valve 34 to be in a gas-liquid two-phase state and flows into the indoor heat exchanger 35. The refrigerant that has flowed into the indoor heat exchanger 35 exchanges heat with the indoor air conveyed by the indoor fan 36, gasifies by absorbing heat, and is returned to the compressor 21. The indoor air is cooled by removing heat from the heat exchange in the indoor heat exchanger 35, and the cooled air is blown out from the outlets 31A and 31B to the perimeter zone to be cooled.

(Heating operation)
In the air conditioner 10, during the heating operation, the refrigerant compressed by the compressor 21 becomes a high-temperature and high-pressure gas refrigerant, which is sent to the indoor heat exchanger 35 through the four-way valve 22. The refrigerant flowing into the indoor heat exchanger 35 is liquefied by exchanging heat with indoor air conveyed by the indoor fan 36 and radiating heat. The indoor air is warmed by absorbing heat by heat exchange in the indoor heat exchanger 35, and the warmed air is blown out from the outlets 31A and 31B to the perimeter zone to perform heating. The refrigerant liquefied by the indoor heat exchanger 35 is decompressed by the expansion valve 34 to be in a gas-liquid two-phase state and flows into the outdoor heat exchanger 23. The refrigerant that has flowed into the outdoor heat exchanger 23 exchanges heat with outdoor air conveyed by the outdoor fan 24, gasifies by absorbing heat, and is returned to the compressor 21.

Next, the operation of the air conditioning system 1 will be described.
FIG. 4 is a flowchart showing the operation of the air-conditioning system according to Embodiment 1 of the present invention.
First, when there is an operation start instruction from the remote controller 4 (S1), the control device 3 checks whether the content of the operation instruction is a cooling operation or a heating operation (S2). In addition to the cooling operation (S3), the air transport fan 50 is caused to perform a cooling operation in conjunction with the cooling operation of the air conditioner 10 (S4). In the cooling operation of the air conditioner 10, as described above, the refrigerant circuit is configured to reduce the temperature difference ΔT (= | T0−T1 |) between the set temperature T0 and the suction temperature T1 detected by the suction temperature detection device 33. The operation which controls is performed. The cooling operation of the air conveyance fan 50 will be described later.

  If it is heating operation in step S2, the air conditioning apparatus 10 is heated (S5), and the air conveyance fan 50 is operated for heating in conjunction with the heating operation of the air conditioning apparatus 10 (S6). Similarly, in the heating operation of the air conditioner 10, the refrigerant circuit is controlled so as to reduce the temperature difference ΔT (= | T0−T1 |) between the set temperature T0 and the suction temperature T1 detected by the suction temperature detection device 33. Do the driving. The heating operation of the air transfer fan 50 will be described later.

  The processes in steps S3 to S6 are continued until an operation stop instruction is issued (S7). When the operation stop instruction is issued, the operation of the air conditioner 10 is stopped (S8) and the operation of the air transport fan 50 is also stopped. (S9).

Next, the cooling operation and the heating operation of the air transfer fan 50 will be described.
In the room, cold air easily moves and stays downward in the room, and warm air easily moves and stays in the room. Therefore, based on this point, the operation of the air conveying fan 50 is made different between when the air conditioner 10 is in the cooling operation and when it is in the heating operation, and the temperature-controlled air blown out from the outlets 31A and 31B to the perimeter zone is changed. The interior temperature distribution is made uniform by efficiently reaching the back zone. This will be specifically described below.

(Cooling operation)
FIG. 5 is an explanatory diagram of the cooling operation of the air carrying fan of FIG.
During the cooling operation of the air conditioner 10, cold air is blown out from the outlets 31A and 31B to the perimeter zone. Since this cool air is easy to move downward, the blowing angles of all the air transport fans 50A to 50C are set to be substantially horizontal. Thereby, the cool air which is easy to move downward can be efficiently supplied to the back side zone. In addition, while the cool air blown out from the outlets 31A and 31B to the perimeter zone is promptly supplied to the back zone, the air conveyance fan 50 is disposed from the perimeter zone side to the back side from the viewpoint of energy saving. The rotational speed control of the plurality of air transport fans 50 is performed so that the wind speed and the air volume become smaller in the order toward the zone side. That is, in order of the air conveyance fan 50A, the air conveyance fan 50B, and the air conveyance fan 50C that are close to the air outlets 31A and 31B, the wind speed is large (air volume is large), the wind speed is medium (air volume is medium), and the wind speed is small (air volume is small).

  By setting it as such an operation | movement, the cold air blown to the perimeter zone at the time of air_conditionaing | cooling operation can be rapidly supplied to a back | inner side zone, and indoor temperature distribution can be made uniform and comfortable air conditioning can be implemented.

(Heating operation)
FIG. 6 is an explanatory diagram of the heating operation of the air carrying fan of FIG.
During the heating operation of the air conditioner 10, warm air is blown out from the outlets 31A and 31B to the perimeter zone. Since this warm air is easy to move upward, the blowing angle θ of all the air conveying fans 50A to 50C is set to be obliquely downward from the horizontal. Then, the respective blowout angles θ are set to increase in the order in which the arrangement position of the air conveyance fan 50 is directed from the perimeter zone side to the back side zone side. In this example, the air conveyance fan 50A, the air conveyance fan 50B, and the air conveyance fan 50C close to the air outlets 31A and 31B are set to 30 °, 45 °, and 60 ° in this order. Note that these angles are merely examples.

  And from the viewpoint of considering energy saving while supplying the temperature-controlled air blown into the room from the outlets 31A and 31B to the back side zone, in the plurality of air transfer fans 50, as in the case of the cooling operation, The rotational speed control is performed so that the wind speed and the air volume become smaller in order from the side closer to the air outlets 31A and 31B to the side farther from the air outlet. That is, in order of the air conveyance fan 50A, the air conveyance fan 50B, and the air conveyance fan 50C that are close to the air outlets 31A and 31B, the wind speed is large (air volume is large), the wind speed is medium (air volume is medium), and the wind speed is small (air volume is small).

  By setting it as such an operation | movement, the warm air blown to the perimeter zone at the time of heating operation can be rapidly supplied to a back side zone, and indoor temperature distribution can be made uniform and comfortable air conditioning can be implemented.

  As described above, according to the present embodiment, one or a plurality of indoor units 30 are gathered and arranged in the perimeter zone to shorten the refrigerant pipe 40 between the indoor unit 30 and the outdoor unit 20. At the same time, the air outlet 31B in the duct type indoor unit 30B is also collected and arranged in the perimeter zone to shorten the duct 32, thereby improving the system efficiency and reducing the power consumption.

  Further, when the air transport fan 50 is used in combination with the air conditioner 10, a plurality of air transport fans 50 are arranged at intervals from the perimeter zone to the back side zone, and the temperature blown out to the perimeter zone. Since air conditioning is relayed so as to be sent to the back zone, temperature-controlled air can be efficiently sent to the back zone.

  In this way, by sending the temperature-controlled air to the back zone, the temperature unevenness in the room can be reduced and the heating effect or the cooling effect can be improved, so the number of installed indoor units 30 can be reduced. Therefore, the introduction cost of the air conditioning system 1 can be suppressed. For example, a space to be conditioned that requires three 4 kW indoor units 30 in the conventional installation method can be handled by one 12 kW indoor unit and two air transfer fans. And since the total refrigerant | coolant piping length or total duct length as the whole system can be shortened by reduction of the installation number of the indoor units 30, power consumption can be reduced. Moreover, since the number of outlets 31A and 31B and inspection openings of the indoor unit 30 provided on the ceiling surface can be reduced by reducing the number of installed indoor units 30, the design of the ceiling surface is also improved.

  Here, the duct-type indoor unit 30B installed in the perimeter zone causes the temperature-controlled air to reach the outlet 31B provided in the back-side zone through the duct 32, and the duct-type indoor unit 30B and its blower. Both outlets 31B are arranged in the perimeter zone, and the power consumption when the temperature-controlled air reaches the back side zone using an air conveyance fan will be compared.

  When using the air conveyance fan 50, in addition to the electric power for operating the indoor unit 30, electric power for operating the air conveyance fan 50 separately is required. However, using only the duct-type indoor unit 30B, the air is made to reach the outlet 31B in the inner zone through the duct 32, and the temperature-controlled air is made to reach the inner zone by the air transfer fan 50 provided on the ceiling. However, since the pressure loss is lower in the method using the air conveyance fan 50, the fan input is also small and the power consumption is small. Therefore, even if power consumption for driving the air conveyance fan is required by separately providing the air conveyance fan 50, the power consumption can be reduced in the entire system, and energy saving operation can be realized.

  In addition, since the operation of the air transfer fan 50 is changed according to the operation mode of the air conditioner 10 and the operation can efficiently eliminate the temperature unevenness in the room during each operation mode, The temperature distribution can be made uniform quickly. Further, as the air conditioning load of the air conditioner 10 becomes smaller, the air speed of the air transfer fan 50 may be lowered. Further, the wind speeds of the air conveyance fans 50 in each group of four units may be the same or different.

  By the way, since the indoor unit 30 is arranged in the perimeter zone, the outdoor unit 20 is installed facing the outer wall near the perimeter zone from the viewpoint of shortening the refrigerant pipe 40. For this reason, when the outdoor unit 20 is installed in a place where it is easy to receive direct sunlight during the cooling operation in summer, the outdoor heat exchanger (condenser) 23 is likely to become high temperature due to the direct sunlight. Therefore, as a countermeasure, a shield for blocking direct sunlight may be installed in the outdoor unit 20. Also, during cooling operation, the drain water condensed in the indoor heat exchanger 35 is always led to the outside of the machine and drained. However, the drain water is directly passed to the shield and the outdoor unit 20 to exchange the outdoor heat. The vessel 23 may be cooled.

Embodiment 2. FIG.
In the first embodiment, the air conditioner 10 performs the heating operation. However, when the outdoor air temperature around the outdoor heat exchanger 23 is low and the evaporation temperature is lower than 0 ° C. during the heating operation, the outdoor heat exchanger Frost adheres to 23. If frost adheres, heating capacity will fall by the fall of the air volume of the air which passes the outdoor heat exchanger 23, and the increase in thermal resistance. For this reason, the defrosting operation which removes frost regularly is needed.

  In the defrosting operation, reverse defrosting is performed. Reverse defrosting melts the frost in the outdoor heat exchanger 23 by reversing the refrigerant flow during the heating operation, thereby using the indoor heat exchanger 35 as an evaporator and the outdoor heat exchanger 23 as a condenser. It is. During the defrosting operation, room heating is not performed, and the room temperature is lowered. Therefore, it is desirable to shorten the defrosting time. Therefore, the indoor fan 36 is operated to increase the evaporation capacity on the indoor unit 30 side, thereby increasing the refrigerant circulation amount and shortening the defrosting time. However, since the indoor heat exchanger 35 is an evaporator during the defrosting operation, when the indoor fan 36 is driven, cold air is blown out from the outlets 31A and 31B. For this reason, there is a problem that cold air hits the occupants and gives an uncomfortable feeling.

  The second embodiment relates to control of the air conveyance fan 50 suitable for such a case. The configuration of the air conditioning system 1 is the same as that of the first embodiment shown in FIG.

  In the air conditioning system 1 according to the second embodiment, during the defrosting operation, the indoor fan 36 of the indoor unit 30 is operated to shorten the defrosting time, but the problem of causing discomfort due to cold air is eliminated. In the first embodiment, the same operation as the cooling operation shown in FIG. 5 is performed.

  Thereby, even if cold air is blown out from the outlets 31 </ b> A and 31 </ b> B, the cold air is diffused into the back zone by the air conveying fan 50. Therefore, even if the indoor fan 36 is operated during the defrosting operation, it is possible to reduce the inconvenience of giving a cold air sensation to people in the vicinity of the air outlets 31A and 31B. Therefore, defrosting can be immediately terminated without impairing comfort.

  As described above, according to the second embodiment, the same effects as those of the first embodiment can be obtained, and the defrosting operation can be completed in a short time without deteriorating comfort during the defrosting operation during the heating operation. It becomes possible.

  Further, a heating device such as a heater may be incorporated in the air conveyance fan 50, and the heating device may be turned on during the defrosting operation to heat the cold air and provide it indoors.

  Moreover, in each figure (FIG.1, FIG.2, FIG.5 and FIG.6) in which arrangement | positioning of the air conveyance fan 50 is shown, it becomes the arrangement | positioning order of the indoor unit 30 and the air conveyance fan 50A from the wall side of a perimeter zone. However, the air transfer fan 50A may be further moved toward the window 2 so that the air transfer fan 50A and the indoor unit 30 are arranged in order.

  DESCRIPTION OF SYMBOLS 1 Air conditioning system, 2 windows, 3 control apparatus, 4 remote control, 10 air conditioning apparatus, 20 outdoor unit, 21 compressor, 22 four-way valve, 23 outdoor heat exchanger, 24 outdoor fan, 30 indoor unit, 30A indoor unit, 30B indoor unit, 31A outlet, 31B outlet, 32 duct, 33 suction temperature detection device, 34 expansion valve, 35 indoor heat exchanger, 36 indoor fan, 40 refrigerant piping, 50 air carrier fan, 50A air carrier fan, 50B Air carrier fan, 50C Air carrier fan.

Claims (6)

One or a plurality of outdoor units and one or more units that are arranged in a perimeter zone that is a zone on one side of the wall of the harmonized space, and temperature-adjusted temperature air is blown to the perimeter zone An air conditioner that forms at least one of a cooling operation and a heating operation by forming a refrigerant circuit between the outdoor unit and the indoor unit,
A plurality of air transport fans that are disposed on the ceiling of the conditioned space and transport air toward a back zone opposite to the perimeter zone in the tuned space;
A control device for controlling the air conditioner and the air conveying fan;
The plurality of air transport fans are arranged at intervals in a direction from the perimeter zone toward the back zone,
The control device operates so that the air volume of each of the plurality of air transport fans is decreased in order from the perimeter zone side toward the back side zone side in conjunction with the operation of the air conditioner. An air-conditioning system characterized by that. The control device, wherein if the air conditioner is cooling operation, the plurality of the blowout angle of the air transport fan air respectively, claim 1 Symbol mounting the air conditioning system is characterized in that a substantially horizontal direction. When the air conditioner is in heating operation, the control device sets the air blowing angle of each of the plurality of air transport fans to a downward angle with respect to the horizontal direction, and the angle is from the perimeter zone side. claim 1 Symbol mounting the air conditioning system characterized by operating so as to be larger in the order toward the far side zone side. One or a plurality of outdoor units and one or more units that are arranged in a perimeter zone that is a zone on one side of the wall of the harmonized space, and temperature-adjusted temperature air is blown to the perimeter zone An air conditioner that forms at least one of a cooling operation and a heating operation by forming a refrigerant circuit between the outdoor unit and the indoor unit,
A plurality of air transport fans that are disposed on the ceiling of the conditioned space and transport air toward a back zone opposite to the perimeter zone in the tuned space;
A control device for controlling the air conditioner and the air conveying fan;
The plurality of air transport fans are arranged at intervals in a direction from the perimeter zone toward the back zone,
The control device is configured to operate each of the plurality of air transport fans with different airflows according to the arrangement position in conjunction with the operation of the air conditioner. The air blowing angle of each of the plurality of air transfer fans is made different between the cooling operation and the heating operation.
When the air conditioner is in cooling operation, the air blowing angle of each of the plurality of air transfer fans is set to a substantially horizontal direction,
When the air conditioner is in heating operation, the air blowing angle of each of the plurality of air transport fans is an angle downward with respect to the horizontal direction, and the angle is from the perimeter zone side to the back side zone side. The air conditioning system is characterized in that it is operated so as to increase in the order of going to . Said control device, each of the air volume of the plurality of air transport fan, according to claim 4, wherein the position, characterized in that the driving from the Perimeter zone side to be smaller in the order toward the far side zone side Air conditioning system.   The air conditioner can perform a defrosting operation of the outdoor heat exchanger of the refrigerant circuit by setting a refrigerant circulation direction in the refrigerant circuit in a direction opposite to that during the heating operation during the heating operation. While the air conditioner is performing the defrosting operation, the indoor fan that blows air to the indoor heat exchanger of the refrigerant circuit is driven, and the air blowing angle of each of the plurality of air transfer fans is set to be substantially horizontal. The air conditioning system according to any one of claims 1 to 5, wherein the air conditioning system is characterized.

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