JP2008298328A - Air conditioning system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioning system capable of reducing local stagnation of air in an air-conditioned space, improving comfort, and further taking advantage of characteristics of a building such as a condominium building, as the realization of an air conditioning system of high efficiency, hardly degrading its efficiency by turbulence and the like, and further an underfloor air conditioning system capable of keeping a height of a ceiling as a value of a dwelling unit is degraded when a height of a ceiling is lowered, are desired. <P>SOLUTION: The purpose of this invention can be achieved by the air conditioning system where the air from an indoor machine is guided to be diffused roughly directly below under floor, an air blower is rotated at a constant speed, and the air blowing off from the indoor machine forms the airflow returning to the indoor machine without passing through a ceiling. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an air conditioning system, and more particularly to an underfloor air conditioning system in which an air conditioner is combined with an apartment building or the like.

  With the recent energy orientation in condominiums and ordinary houses, high air-tightness and high heat insulation are being promoted, and energy saving has become an essential issue in air conditioning systems.

  Patent Document 1 describes an underfloor air conditioning system in which a plurality of rooms as a whole is a comfortable air-conditioning space with little temperature deviation. This includes a conditioned air outlet passage composed of an underfloor space in the air-conditioning target area and an air passage in the wall surrounding the air-conditioning target space, and walls of the air-conditioning target space (including baseboards, edges, and outlet plate) It is described that the air outlet is provided obliquely upward or obliquely downward.

  Patent Document 2 relates to an under-floor air conditioning system that does not generate a swirling flow in an underfloor chamber, equalizes the blowing temperature and the blowing air volume of the conditioned air blown out from each outlet, and prevents unevenness in the air-conditioned room. Are listed. For this purpose, a suction pressure equalization chamber partitioned by a plurality of relief dampers is formed on the other sidewall side of the underfloor chamber facing the discharge port formed on one side wall of the underfloor chamber, and for suction through the relief damper. It is described that the conditioned air sucked into the pressure equalizing chamber is discharged to a portion other than the underfloor chamber through a discharge path.

JP 2006-078128 A JP 07-217940 A

  However, Patent Document 1 does not consider reduction in efficiency due to turbulent flow or the like in the underfloor space. Patent Document 2 considers temperature unevenness due to a swirling flow or the like in the underfloor space, but does not consider a case where efficiency is lowered due to turbulent flow or the like in the underfloor space or when the airflow is slow. Moreover, it is related to the air conditioning of one room, and further, it is necessary to provide a configuration for air conditioning in the back of the ceiling.

  Therefore, an efficient air conditioning system in which the efficiency reduction due to turbulence or the like is small is desired. Moreover, since the value of a dwelling unit falls when the ceiling height is lowered, it is desired to realize an underfloor air conditioning system while keeping the ceiling height as high as possible. In that case, it is desirable to reduce stagnation of local air in the air-conditioning target space and improve comfort. Furthermore, it is desirable that the air conditioning system take advantage of the characteristics of buildings such as apartment buildings.

  An object of the present invention is to provide an efficient air conditioning system that can maintain a high ceiling height.

The purpose of the present invention is to
An air conditioning system that air-conditions a plurality of rooms with an outdoor unit, an indoor unit that blows air below the floor with a built-in blower, and a refrigeration cycle that includes the outdoor unit and the indoor unit,
A duct that guides the air from the indoor unit so as to dissipate substantially directly below the floor,
A control circuit for rotating the blower at a constant speed,
The air blown out from the indoor unit passes through the plurality of rooms under the floor and is achieved by an air conditioning system that forms an air flow returning to the indoor unit without passing through the ceiling.

  ADVANTAGE OF THE INVENTION According to this invention, ceiling height can be kept high and an efficient air conditioning system can be implement | achieved.

  Embodiments of the present invention will be described below.

  An embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is an overview of the air conditioning system. 1 is an indoor unit of an air conditioner, 2a and 2b are rectangular ducts for guiding air blown from the indoor unit 1, 3 is a suction grill for sucking air for heat exchange in the indoor unit 1, and 4 is an outdoor of the air conditioner It is a machine and is installed next to the entrance and on the veranda. 5 is a refrigerant pipe that connects the indoor unit 1 and the outdoor unit 4 to form a refrigeration cycle, 6 is a concrete slab that is part of a building, 7 is an underfloor space through which air blown out from the square ducts 2a and 2b flows, and 20 Reference numeral 50 denotes a floor, 50 denotes an entrance hall where the indoor unit 1 is installed, and 60 denotes an outdoor space.

  The indoor unit 1 can perform cooling, heating, and reheat dehumidification operation, and performs an operation according to a user's request. The indoor unit 1 has the same structure as a so-called ceiling cassette type air conditioner, and details will be described later with reference to FIG. The installation place of the indoor unit 1 is, for example, a space under the shoebox. In ordinary air conditioners, so-called room air conditioners and ceiling cassette type air conditioners, air is directly blown into the room 12, but in this air conditioning system, air is once passed from the indoor unit 1 to the underfloor space 7 via the square ducts 2a and 2b. Blow out. In this way, the air that is thermally loaded by the indoor unit 1 is dissipated into the underfloor space 7 while the discharge surface wind speed is suppressed and the discharge static pressure is maintained. The discharged air is always blown at a constant speed. The underfloor space 7 is a large space surrounded by the floor 20 and the concrete slab 6, and the natural and temperature distribution is balanced and uniform in the space, and the pressure is also balanced and uniform. The underfloor space 7 serves as a discharge chamber that is a space for storing heat-loaded air, and serves as one heat source. In addition, the height of the underfloor space 7 is about 200 mm to 250 mm.

  FIG. 2 is a diagram showing the flow of air by the air conditioning system. 11 is a discharge port, 12 is a room. As described above, the air in the underfloor space 7 serving as one heat source is blown out to the room 12 through each discharge port 11 provided in the room 12. The blown air is sucked into the suction grill 3. As a result, an air flow is generated, and the room 12 is heated by this air flow. By constantly setting the air flow at a constant speed, a constant air circulation can be formed in the room 12.

In this air conditioning system, each interior of a condominium or the like is considered as one space, and the entire building is air-conditioned with one air conditioner, that is, one refrigeration cycle. This is different from individual air conditioning in which room air conditioners are installed in each room 12. In the entire building air-conditioning system, by using one refrigeration cycle, it is possible to reduce CO ₂ emissions and realize an air-conditioning system that is friendly to the earth.

  The installation of the indoor unit 1 will be described with reference to FIG. FIG. 3 is a diagram relating to installation of the air conditioner. The indoor unit 1 is installed in a space or the like under a clog box, but has a structure suspended from a housing. 111 is an indoor unit discharge port for blowing out air from the indoor unit 1, 201a and 201b are attachments for suspending the indoor unit 1 from the housing, 202a and 202b are attached to the indoor unit 1, and are associated with the attachments 201a and 201b. The main body hanging fitting. The fixtures 201a and 201b are fixed so as to be suspended from the casing, and engage with the main body hanging brackets 202a and 202b of the indoor unit 1. The indoor unit 1 is suspended from the housing by this engagement.

  Next, communication between the indoor unit discharge port 111 of the indoor unit 1 and the underfloor space 7 will be described. In the perspective view, the indoor unit discharge port 111 is not rounded but is literally represented by a rectangle. The square ducts 2 a and 2 b are attached to the indoor unit 1 in order to guide the air blown out from the indoor unit discharge port 111 to the underfloor space 7. The attachment is screwed into a screw hole outside the square area with rounded corners. By this attachment, the indoor unit 1 and the underfloor space 7 communicate with each other, and a ventilation path is formed.

  The cross-sectional area of the air passage changes from the cross-sectional area of the indoor unit discharge port 111 to the cross-sectional area of the square ducts 2a and 2b. The internal dimensions of the square ducts 2a and 2b are set to an area approximately 1.5 times larger than the indoor unit discharge port 111. Therefore, the flow from the indoor unit 1 is expanded and decelerated by the angular ducts 2a and 2b. That is, the rush wind speed under the floor can be suppressed by making such an area relationship. This contributes to the reduction of turbulent flow in the underfloor space 7 and contributes to realizing efficient air conditioning.

  Next, the indoor unit 1 itself will be described with reference to FIG. FIG. 4 is a view of the air conditioner as viewed from below (viewed from the floor toward the ceiling), (a) is an overview diagram with the dew pan attached, and (b) is a view with the dew pan removed. is there.

  101 is an outer box of the indoor unit 1, 102 is a sirocco fan that is a blower, 103 is a heat exchanger, 104 is a dew tray, 105 is a dew plate fixing tool that is a fixing device of the dew plate 104, and 106 is an inlet. One side is connected to the suction grill 3, 107 is a humidity sensor, 108 is an electrical component box incorporating a control circuit for controlling the operation state, 109 is an auto restart switch for recovering from a power failure, and 110 is a static pressure switch.

  These parts are stored in the outer box 101. The sirocco fan 102 sucks air from the suction port 106 through the suction grill 3, causes heat exchange with the heat exchanger 103, and blows out heat-exchanged air from the indoor unit discharge port 111. Since this air conditioner is configured to be able to perform a dehumidifying operation in addition to a cooling / heating operation, dew condensation occurs on the heat exchanger 103 during the dehumidifying operation. A dew tray 104 is provided so that the condensed dew does not drip into the outer box 101. The dew tray 104 is fixed at three places by a dew tray fixing tool 105.

  The operating state (room temperature, room humidity, air volume) such as cooling, heating, and dehumidification is determined by the control circuit in the electrical component box 108 based on information from the humidity sensor 107, a temperature sensor described later, and a wired remote controller 40 described later. It is controlled by issuing a command to the actuator. The reason why the humidity sensor 107 is disposed on the lower surface of the indoor unit 1 is to perform control based on the humidity determination at the portion of the floor where air gathers most.

  The case where such an indoor unit 1 is installed in one house such as a condominium will be described in more detail than FIG. 2 with reference to FIGS. FIG. 5 is a side view showing the air flow when the air conditioning system is applied to an actual room, FIG. 6 is a plan view showing the air flow when the air conditioning system is applied to the actual room, and FIG. It is sectional drawing which shows the flow of the air which blows off from space. 12 is a room, 20 is a floor, 21 is a door, 22 is an undercut provided on the door 21, 23 is a ceiling surface, 24 is a ceiling back, 30 is a baseboard, 31 is a baseboard 30 part from the space under the floor 7 A baseboard outlet from which air is blown out, 40 is a wired remote controller for operating the air conditioner, 50 is an entrance hall, 51 is a clog box and a container. Reference numeral 15 denotes furniture or the like.

  In FIG. 5, as shown in FIG. 2, the air in the underfloor space 7 is blown into the room 12 from each discharge port (each discharge port 11 and each baseboard discharge port 31) disposed in the room 12. The balloon from the baseboard 30 is as shown in FIG. Since the entire underfloor space 7 is used as a discharge chamber of the air conditioner, the air stored in the discharge chamber and thermally loaded has a uniform temperature balance, and each discharge port (each discharge port 11. Air with temperature balance is blown out at each baseboard discharge port 31) (see also FIG. 6). The air under the underfloor space 7 is uniformly air-conditioned in each room 12 by blowing it out from each outlet (each outlet 11 and each baseboard outlet 31) installed in each room 12, The temperature balance between the rooms 12 can be adjusted.

  This is because, as described with reference to FIG. 2, air is constantly recirculating at a constant speed. The blown air rides on the airflow and is sucked into the suction grill 3. In this way, temperature barrier-free can be realized. The temperature barrier-free means that there is no temperature difference between the rooms 12.

  In order to make this possible, it is important to dissipate the air heat-loaded in the indoor unit 1 to the under-floor space 7 through the square ducts 2a and 2b and to perform constant blowing. “Constantly constant” here means that the rotational speed of the fan is kept constant when the air volume is not changed. As in a hotel or the like, the air volume can be changed in three stages, for example, “strong”, “medium”, and “weak”.

  If the duct is forced under the floor 20 so as to blow air away from the indoor unit 1, the directivity is very good, but the pressure loss inside the duct increases, The air volume that circulates under the floor itself will drop. In addition, the pressure / temperature balance in the underfloor space is impaired. As a result, the temperature difference between the room close to the room unit 1 and the room far from the indoor unit 1 increases, making it impossible to perform temperature barrier-free.

  Accordingly, the entire underfloor space 7 is used as a discharge chamber without using such a duct. In this way, even when the entire underfloor space 7 is used as a discharge chamber, in order to provide directivity to the air in the underfloor space 7 without reducing the amount of air circulating through the entire underfloor, the indoor unit discharge port 111 is provided. It is necessary to provide it. At that time, it is important to reduce the surface wind speed of the air blown from the indoor unit 1 to the underfloor space 7 to some extent, to suppress the pressure loss due to turbulent flow under the floor, and to maintain the discharge static pressure.

  For this reason, first of all, the air blown out from the indoor unit 1 is blown out almost right by the corner ducts 2a and 2b without being blown out parallel to the floor 20. In the embodiment, the angle is 90 degrees. However, since it may be less than 90 degrees due to a problem in installation, the angle between the floor 20 and the axis of the corner ducts 2a and 2b may be 75 degrees or more. By doing so, the airflow in the underfloor space 7 does not have a large velocity, and turbulence is reduced. Next, the internal dimensions of the square ducts 2a and 2b are approximately 1.5 times larger than the indoor unit discharge port 111, thereby suppressing the rush air velocity under the floor and reducing the turbulent flow in the underfloor space 7. With the above configuration, the discharge chamber is maintained as a uniform heat source so as not to stir the underfloor space 7.

  The actual airflow will be described. Since the actual room 12 is partitioned by the door 21 and the wall, air does not flow when the door 21 is closed. Therefore, an undercut 22 is provided on the door 21 so that air flows even if the door 21 is closed. In some cases, a hole as an undercut 22 may be provided in the wall. With such a configuration, airflow can be generated in each room 12.

  In the air conditioning system, the ceiling back 24 is not used, and the ceiling back 24 is not provided with a configuration for air conditioning. That is, an air conditioning system can be realized with a simple configuration. In addition, an air conditioning system can be introduced without lowering the ceiling height accordingly.

  Control of the indoor air temperature (for example, every 1 degree) and the air volume (for example, three stages) is performed by operating the wired remote controller 40. This wired remote controller 40 has a built-in temperature sensor. The wired remote controller 40 is installed on the wall, and is installed at a portion where the air in each room 12 gathers (a portion where the airflow gathers) where there is little external heat influence. Since the humidity sensor 107 is installed on the lower surface of the indoor unit 1, more specifically, on the lower part of a shoebox or the like, the installation position of the temperature sensor and the installation position of the humidity sensor 107 are different.

  FIG. 6A shows a state where air is blown from the baseboard discharge port 31 without providing the discharge port 11. Since the entire underfloor space 7 is a discharge chamber as described above, substantially the same blowout is made from each baseboard discharge port 31. The air blown out in this way goes to the indoor unit 1 and gathers around the entrance hall 50 and the like. Accordingly, the wired remote controller 40 is disposed at that position.

  However, furniture 15 or the like is usually placed near the wall, or the baseboard discharge port 31 may not be provided on the wall side due to the structure. When the baseboard discharge port 31 is partially blocked, air cannot be blown out from the portion, and the temperature balance of the room 12 is locally deteriorated. Thus, by providing the discharge port 11 on the floor 20 near the unbalanced part, that is, the place where the baseboard discharge port 31 cannot be provided, air is blown out from the discharge port 11 to adjust the balance (FIG. 6 ( b)). When this discharge port 11 is provided, the air blown out from the corner ducts 2a and 2b to the underfloor space 7 is directed to the discharge port 11, so that the air flow in the underfloor space 7 can have a weak directivity. The air volume to the room 12 provided with the discharge port 11 can be locally increased. Therefore, the temperature balance of the room 12 can be achieved.

  In FIG. 6B, the air flow from the baseboard discharge port 31 other than the air flow from the discharge port 11 toward the indoor unit 1 is omitted, and the number of arrows representing the air flow in FIGS. Although different, if the air volume blown out from the indoor unit 1 is the same, the air volume at the position of the wired remote controller 40, that is, the number of arrows is also the same.

  The discharge port 11 can be covered with a panel or the like constituting the floor 20, and the discharge port 11 can be provided by removing the panel or the like at a free position. Note that the same surface as the floor 20 can be formed by covering with a panel or the like. By covering the discharge port 11 with a grill or the like, it becomes equivalent to the plane of the floor 20 without impairing the function.

  Further, since the air volume locally increases at the location where the discharge port 11 is provided, the room temperature can be adjusted slightly. The room temperature adjustment referred to here is room temperature adjustment that brings the room temperature of the room 12 close to the temperature of the air blown from the discharge port 11. If the opening of the panel or the like corresponding to the discharge port 11 is made into a small area unit for improving the comfort, the room temperature can be finely adjusted. Conversely, when a large opening area is desired, a plurality of adjacent panels or the like may be opened to form the discharge port 11.

  As described above, in order to provide directivity to the airflow blown into the underfloor space 7 or to naturally balance the temperature and pressure of the air, the amount of blown air from the indoor unit 1 is always constant. There is a need to. It is necessary to adjust the temperature by raising or lowering the temperature of the heat exchanger regardless of the air volume. This is done by maintaining the sirocco fan 102, which is a blower built in the indoor unit 1, at a constant speed by the control circuit and dissipating the heat-loaded air in the underfloor space 7. And by blowing out the air in the underfloor space 7 having a uniform heat load to each room 12, the stagnation of the air in the large space to be air-conditioned and the room temperature difference between the rooms are reduced. Comfort is improved by making the temperature barrier-free.

  Next, an apartment building will be described with reference to FIG. FIG. 8 is a diagram showing an apartment construction, (a) is a diagram showing an outer heat insulation structure, and (b) is a diagram showing an inner heat insulation structure. 70 is an outer wall, 71 is a ventilation layer, and 72 is a heat insulating material.

  In the outer heat insulating structure shown in FIG. 8A, an outer wall 70, a ventilation layer 71, a heat insulating material 72, and a concrete slab 6 exist between the outdoor 60 and the room 12. Since the heat insulating material 72 is on the outdoor side of the concrete slab 6 which is a heat storage body, the influence of the thermal bridge through the concrete slab 6 can be reduced. In other words, the thermal effect outside the room is reduced. Moreover, since the concrete slab 6 itself can be used as a heat storage body, the concrete slab 6 itself can be heated to form a heat insulating layer, thereby reducing the heat consumption energy in the room. It is a structure that does not release the indoor or indoor heat during heating, and it can be said that the heat retaining performance is high. Therefore, at the time of heating operation of the air conditioner, there is an effect of floor heating. At this time, the upper surface of the underfloor space 7 is covered with the floor 20, and the other five surfaces are covered with the concrete slab 6.

  On the other hand, in the inner heat insulating structure shown in FIG. 8B, the concrete slab 6 and the heat insulating material 72 exist between the outdoor 60 and the room 12. However, the part connected from the outdoor 60 to the room through the concrete slab 6, the underfloor space 7, and the floor 20 (underfloor route), and the part connected from the outdoor 60 to the room through the concrete slab 6, the ceiling back 24, and the ceiling surface 23 ( There is also a ceiling route. Since the heat insulating material 72 is located on the indoor side of the concrete slab 6 that is a heat storage body, the room has a portion (underfloor path or ceiling path) that is easily affected by heat from outside. These portions are greatly affected by the thermal bridge through the concrete slab 6. For example, at the time of heating, the heat is easily released to the outside of the room, and the heat consumption energy in the room is larger than that of the outside heat insulating structure. Therefore, the effect of floor heating cannot be expected.

  If the outer heat insulating structure is adopted and the amount of air blown from the indoor unit 1 is always constant as described above, the surface of the housing can be kept heated. In addition, in a time zone where there is little external heat influence, heat dissipation of the heat stored in this housing is promoted, and heat dissipation from this housing can be used as air conditioning assistance, and housing heat storage air conditioning can be put into practice. . In the conventional air-conditioning only in the living room, the amount of heat leaked under the floor cannot be recovered, and the air-conditioning has a large heat loss such as air-conditioning while throwing away energy. Can be used as part of the airflow path of the air conditioner, including the energy of the conventional heat loss, and always constant with the air velocity from the air conditioner to the underfloor space being suppressed. By blowing at high speed, a uniform balance of temperature and pressure can be created in the underfloor space, and heat can be effectively used without waste by giving heat to the enclosure or radiating heat from the enclosure. It became possible to do. Moreover, by arranging the heat source in the underfloor space, there is a floor heating effect in the heating period, and air conditioning by radiant heat from the feet can be performed.

  In the above embodiment, by reducing the surface air speed of the air blown from the air conditioner discharged into the underfloor space, the discharge static pressure is reduced and the pressure / temperature balance of the underfloor space is achieved. In order to maintain the static pressure in the underfloor space, the dynamic pressure decreases, so the force pushing the air becomes weak at the discharge part from the part far from the air conditioner, so the temperature balance between the rooms can be increased by increasing the discharge opening area. adjust. In addition, by suppressing the discharge surface wind speed from the air conditioner to the underfloor space, it is blown out into the room while suppressing the static pressure drop in the underfloor space as much as possible, and it is comfortable by circulating slowly through the entire floor including the underfloor space A comfortable air-conditioned space.

By performing air conditioning throughout the building in this way, temperature barrier-free becomes possible, and temperature and humidity can be collectively managed. In addition, by using the entire underfloor space 7 between the rooms 12 as a discharge chamber, a floor heating effect can be obtained during heating operation. Further, since the air in the room 12 is constantly circulated with a constant air volume, there is no local increase in humidity, and the occurrence of mold and the like is suppressed. The constant flow of air in the room 12 provides a refreshing feeling and contributes to an improvement in comfort. In addition, the comfort of the living space can be improved, and an air-conditioning system that is friendly to the earth can be realized. The indoor temperature can be kept constant and the CO ₂ emissions can be reduced.

  In addition, it can also comprise as follows.

A refrigeration cycle comprising an outdoor unit, an indoor unit that blows air under the floor by a built-in blower, and an underfloor space that stores heat of the air blown from the indoor unit, and configured by the outdoor unit and the indoor unit An air conditioning system that air-conditions multiple rooms,
A duct that guides the air from the indoor unit so as to dissipate substantially directly below the floor,
A control circuit for rotating the blower at a constant speed;
A discharge port for blowing out air from the underfloor space in the room, and
The air blown out from the indoor unit passes through the underfloor space and the plurality of rooms, forms an air flow that returns to the indoor unit without passing through the ceiling, and performs air conditioning using the underfloor space as one heat source. Can do.

  At that time, the cross-sectional area of the air passage from the indoor unit to the underfloor space may be larger than the cross-sectional area of the duct than the cross-sectional area of the indoor unit discharge port which is an air outlet of the indoor unit. .

  In that case, the said discharge outlet is good also as a baseboard discharge outlet provided in the baseboard. In this case, the discharge port may include a discharge port provided on the floor. As a result, local air stagnation in the air-conditioning target space is reduced, which contributes to improving comfort.

  Moreover, the upper surface of the underfloor space may be covered with the floor, and the other five surfaces may be covered with a concrete slab of a building. Moreover, the said air conditioning system can make use of the characteristics of buildings, such as a condominium structure, by making a building structure into an outer heat insulation structure.

It is an overview figure of an air-conditioning system. It is a figure which shows the flow of the air by an air conditioning system. It is a figure regarding installation of an air conditioner. It is the figure which looked up at the air conditioner from the bottom, (a) is the general view which attached the dew pan, (b) is the figure which removed the dew pan. It is a side view which shows the flow of the air at the time of applying an air conditioning system to an actual room. It is a top view which shows the flow of the air at the time of applying an air conditioning system to an actual room. It is sectional drawing which shows the flow of the air which blows off from underfloor space. It is a figure which shows an apartment construction, (a) is a figure which shows outer heat insulation structure, (b) is a figure which shows inner heat insulation structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Air conditioner indoor unit 2a, 2b Square duct 3 Suction grill 4 Air conditioner outdoor unit 5 Refrigerant piping 6 Concrete slab 7 Underfloor space 11 Discharge port 12 Room 15 Furniture etc. 20 Floor 21 Door 22 Undercut 23 Ceiling 24 Ceiling 30 Baseboard 31 Baseboard outlet 40 Wired remote control 50 Entrance hall, etc. 51 Clog box, container, etc. 60 Outdoor 70 Outer wall 71 Ventilation layer 72 Heat insulating material 101 Outer box 102 Sirocco fan 103 Heat exchanger 104 Dew tray 105 Dew tray Fixing device 106 Suction port 107 Humidity sensor 108 Electrical box 109 Auto restart switch 110 for recovering from power failure Static pressure switch 111 Indoor unit discharge port 112 Drain hoses 201a and 201b Fixing tools 202a and 202b

Claims (4)

An air conditioning system that air-conditions a plurality of rooms with an outdoor unit, an indoor unit that blows air below the floor with a built-in blower, and a refrigeration cycle that includes the outdoor unit and the indoor unit,
A duct that guides the air from the indoor unit so as to dissipate substantially directly below the floor,
A control circuit for rotating the blower at a constant speed,
An air conditioning system in which air blown out from the indoor unit forms an airflow that passes through the plurality of rooms under the floor and returns to the indoor unit without passing through a ceiling. In claim 1,
The cross-sectional area of the air passage from the indoor unit to the underfloor space is characterized in that the cross-sectional area of the duct is larger than the cross-sectional area of the indoor unit discharge port that is an air outlet of the indoor unit. Air conditioning system. In claim 1,
An air conditioning system comprising a static pressure switch for giving a command of the air volume. In claim 1,
An air conditioning system comprising a remote controller for giving a room temperature command.

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