JP5364551B2 - Switchable air conditioning system using a buried duct type packaged air conditioner. - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a comfortable air-conditioning system capable of preventing feet from being excessively cooled during cooling, and capable of preventing deterioration of work efficiency caused by discomfort due to the heat. <P>SOLUTION: The ceiling-embedded duct package air conditioner is arranged in an upper layer space, and first to fourth motor driving type switching dampers are connected in front and behind. By switching the dampers, during cooling, cold air from the package air conditioner is blown to an inside of an air conditioning target room from a blowout port on a ceiling surface, and the air after air-conditioned is sucked from an air distributing opening on a floor surface, and is returned to the package air conditioner through a rising duct. During heating, warm air from the package air conditioner is supplied to the air conditioning target room from the air distributing opening on the floor surface through the rising duct, and the air after air-conditioned is made to flow from a suction port on the ceiling surface to the upper surface space, and is returned to the package air conditioner. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to an underfloor and ceiling chamber type air conditioning system in an office space.

  Underfloor air conditioning systems using OA floors are widely used, but there has been a demand for improved thermal environments and individual air conditioning to cope with cool biz in the summer.

The conventional underfloor type air conditioning system has the following problems.
(1) During cooling, the feet are too cold, making it unsuitable for those with weak physical strength.
(2) Floor insulation is required to prevent condensation on the floor slab.
(3) In Cool Biz air conditioning (room temperature 28 ° C.), work efficiency decreases due to discomfort due to heat.
(4) Equipment installation space such as a machine room is required.

(5) Since the equipment is installed at a location relatively far from the work space of the office, when the OA floor is low (150 mm or less), the pressure loss to the air outlet increases, making it difficult to reach the airflow. Therefore, the OA floor must be set high (200 to 250 mm).
(6) When a return chamber (return) air is sucked from the ceiling by adding a ceiling chamber method, the heat generated by the luminaire tends to become a direct load during cooling, which is not suitable for energy saving.

In JP-A-9-137965 “Under Floor Air Conditioning System”, since an air conditioner is installed in the perimeter zone, an installation space is required in the air conditioning target room.

Japanese Laid-Open Patent Publication No. 2006-29665 “Ceiling-buried type or ceiling-suspended type air conditioner” shows a ceiling-buried type air conditioner.

A first object of the present invention is to provide a comfortable air conditioning system in which the feet do not get too cold during cooling and the work efficiency does not decrease due to discomfort due to heat.
A second object of the present invention is to provide an air conditioning system that enables improvement in versatility and workability by patterning (modularization) with a compact system configuration.
A third object of the present invention is to provide an air conditioning system that enables personal air conditioning (local air conditioning) that is easier to control the temperature than in the past.
A fourth object of the present invention is to provide an air conditioning system that enables reduction of air conditioning operation costs and CO ₂ .

In order to solve the above-described problems, the present invention is, in its basic mode, provided in an upper layer space (ceiling space) provided above the ceiling surface of the air-conditioning target room and below the floor surface of the air-conditioning target room. and underfloor space with the the upper space and the underfloor space and a plurality of standing on duct Ru communicated, a plurality of air outlets and a suction port is provided on the ceiling surface, a plurality of air flow openings in the floor Is provided, and a ceiling-type air-conditioning system and a floor-type air-conditioning system that are switched between a ceiling air-conditioning system and a floor air-conditioning system are provided.

In this air conditioning system, first and second motor-driven switching dampers are connected to a circuit on the air intake side of the packaged air conditioner, the first switching damper is connected to the rising duct, and the second switching damper is It is connected to a duct that sucks air in the upper space, and third and fourth motor-driven switching dampers are connected to a circuit on the air discharge side of the packaged air conditioner, and the third switching damper is connected to the air outlet on the ceiling surface. It is connected to the duct, the fourth switching damper that is connected to the startup duct.
Further, a pair of the buried duct type packaged air conditioners are arranged in opposite directions in the upper space, and one of the pair of buried duct type packaged air conditioners has a circuit on the air intake side of one of the buried duct type packaged air conditioners. A circuit closer to the rising duct than the first motor-driven switching damper and a circuit on the air discharge side of the other buried duct type package air conditioner to the rising duct than the fourth motor-driven switching damper The near side is connected.

  Thus, at the time of cooling, the first and third switching dampers are opened and the second and fourth switching dampers are closed, and the air from the rise duct is air-conditioned through the package air conditioner from the ceiling outlet. The air is blown into the room and the air after the air conditioning is sucked from the air circulation opening on the floor surface, and is returned to the packaged air conditioner through the rising duct.

  During heating, the first and third switching dampers are closed and the second and fourth switching dampers are opened, and the air in the upper space is passed from the air flow opening on the floor surface via the package air conditioner and the rising duct. The air-conditioning target room can be supplied, and the air after the air-conditioning can be operated to flow from the suction port on the ceiling surface to the upper space and return to the packaged air conditioner.

Based on this configuration, in the air conditioning system according to the present invention,
(1) With the function of switching by a buried duct type packaged air conditioner and a motor damper, it operates with “ceiling blowout → floor suction” in the cooling mode, and in the heating mode, it operates with “floor blowout → ceiling suction” with the airflow direction reversed. . This makes it possible to create an ideal thermal environment of “head cold foot heat” in the living area during working hours, both during cooling and during heating.
(2) A comfortable air conditioning system is realized in which the feet do not get too cold during cooling and the work efficiency does not decrease due to discomfort due to heat.
(3) An air conditioning system that can improve versatility and workability by patterning (modularization) with a compact system configuration is realized.
(4) Finer personal air conditioning (local air conditioning) for each module is possible.
(5) Many advantages such as reduction in air-conditioning operation cost and reduction in CO ₂ can be obtained.

  As a more preferred aspect, a compact configuration is realized by arranging a pair of (two sets of) buried duct type package air conditioners in opposite directions in the upper space, and further patterning (modularization) is performed. As a result, the versatility can be given and the workability can be improved.

  As a more preferable aspect, if a ceiling fan for air agitation is installed on the ceiling surface of the air-conditioning target room, an air current is generated by the ceiling fan, so that the sensible temperature is lowered during cooling and the comfort is improved. In addition, during heating, warm air accumulated near the ceiling can be circulated to eliminate indoor temperature unevenness.

In the heating mode, the return can be used as a ceiling chamber system to recover the heat generated by the luminaire and use it for heating. In addition, by using individual air conditioning for each span, operation with a minimum number of units becomes possible. If a ceiling fan is installed, energy consumption and CO ₂ reduction (20% or more) can be expected if the air conditioner is stopped during the overtime hours in summer and the cool fan is operated with the ceiling fan.

The top view showing the time of the ceiling blowing floor suction of the air-conditioning system by this invention at the time of cooling. The longitudinal cross-sectional view showing the time of the ceiling blowing floor suction cooling of the air-conditioning system by this invention. The top view showing the floor blowing ceiling suction heating of the air-conditioning system by this invention. The longitudinal section showing the time of floor blowing ceiling suction heating of the air-conditioning system by the present invention. The top view showing the time of the ceiling blow-off floor suction of the air-conditioning system which installed the ceiling fan. The longitudinal cross-sectional view showing the time of the ceiling blow-off floor suction of the air conditioning system which installed the ceiling fan. The top view showing the time of floor blowing ceiling suction heating of the air-conditioning system which installed the ceiling fan. The longitudinal cross-sectional view showing the time of the floor blowing ceiling suction heating of the air-conditioning system which installed the ceiling fan.

FIGS. 1 and 2 show a ceiling blow-off floor suction cooling operation of the switchable air conditioning system according to the present invention. This air conditioning system is an upper layer space (behind the ceiling) provided above the ceiling surface 12 of the air conditioning target room 10. Space) 14, an underfloor space 18 provided below the floor surface 16 of the air-conditioning target room 10, and a rising duct 20 that allows the upper space 14 and the underfloor space 18 to communicate with each other.
The ceiling surface 12 is provided with a plurality of air outlets 22 and suction ports 23, the floor surface 16 is provided with a plurality of air circulation openings 24, and a commercially available buried duct type package air conditioner 30 is disposed in the upper layer space 14. A system for switching between ceiling air conditioning and floor air conditioning is constructed.

  First and second motor-driven switching dampers 32 and 34 are connected to a circuit on the air intake side of the package air conditioner 30, and the first switching damper 32 is connected to the rising duct 20 and the second switching damper 34. Is connected to a duct that sucks air in the upper space through the opening 26. The circuit on the air discharge side of the package air conditioner 30 is connected to third and fourth motor-driven switching dampers 36 and 38, and the third switching damper 36 is connected to a duct connected to the air outlet 22 of the ceiling surface 12, The fourth switching damper 38 is connected to the rising duct 20.

  Thus, during the cooling shown in FIGS. 1 and 2, the first and third switching dampers are opened, the second and fourth switching dampers are closed, and the air from the rising duct passes through the package air conditioner. The air is blown out from the air outlet 22 on the ceiling surface into the air conditioning target room, and the air after the air conditioning is sucked in from the air circulation opening 24 on the floor surface and returned to the packaged air conditioner via the rising duct 20.

  3 and 4 show the floor blown ceiling suction heating of the air conditioning switching system according to the present invention. During heating, the first and third switching dampers are closed and the second and fourth switching dampers are opened. Then, the air in the upper space 14 is supplied from the air circulation opening 24 of the floor 16 into the air-conditioning target room 10 via the package air conditioner 30 and the rising duct 20. The air after the air conditioning flows from the suction port 23 of the ceiling surface 12 to the upper space 14 and returns to the packaged air conditioner 30.

  Further, as shown in FIGS. 1 and 3, a pair of buried duct type packaged air conditioners 30 are disposed in the upper layer space 14 in the opposite direction. By arranging in the reverse direction in this way, the duct arrangement can be compactly accommodated and can be comfortably placed in the ceiling.

  FIGS. 5 to 8 show an embodiment in which a ceiling fan 50 for air agitation is installed on the ceiling surface of the air-conditioning target room. FIGS. 7 and 8 show the floor blowing and ceiling suction heating of the air conditioning switching system according to the present invention. In this way, if the ceiling fan 50 for air agitation is installed, the air temperature is generated by the ceiling fan during cooling, so that the sensible temperature is lowered and the comfort is improved. In addition, the air conditioner can be stopped during overtime and cool air can be operated by a ceiling fan. In addition, during heating, warm air accumulated near the ceiling can be circulated to eliminate indoor temperature unevenness.

1, 3, 5, and 7, reference numeral 44 represents a beam in the ceiling.
As shown in FIGS. 2, 4, 6, and 8, if a motor damper changeover switch 42 is provided in the air-conditioning target room 10, it works in the office within the range of a pair of buried duct type packaged air conditioners. Personal air conditioning suitable for a person can be realized.

Other effects of the present invention include:
(1) In the underfloor space, there is no risk of dew condensation during cooling and heating, so that the heat insulation work on the floor surface can be omitted, which is particularly advantageous when renovating existing facilities.
(2) No machine room space is required. Since the distance between the air conditioner and the air flow opening on the floor is short, the pressure loss is small, and the height of the OA floor can be made lower (about 150 mm) than before.
(3) During heating, the heat generated by the luminaire can be recovered to save energy.
(4) Since the vertical duct can use a columnar space, a large installation space is not required.

  As described above in detail, according to the air conditioning system of the present invention, a comfortable air conditioning system is provided in which the feet do not get too cold during cooling and the work efficiency does not decrease due to discomfort due to heat. In addition, many advantages as described above are obtained, and the technical value is extremely remarkable.

DESCRIPTION OF SYMBOLS 10 Air-conditioning target room 12 Ceiling surface 14 Upper-layer space 16 Floor surface 18 Under-floor space 20 Standing duct 22 Air outlet 23 Suction port 24 Air distribution opening 26 Opening part 30 Buried duct type package air conditioner 32, 34, 36, 38 Motor drive type Switching damper 50 Ceiling fan SA Supply air RA Return air

Claims (2)

An upper space (14) provided above the ceiling surface (12) of the air-conditioning target room (10);
An underfloor space (18) provided below the floor (16) of the air-conditioned room,
A plurality of the standing upper duct (20) which Ru is communicated with said underfloor space and the upper space,
A plurality of air outlets (22) and suction ports (23) are provided on the ceiling surface,
A plurality of air flow openings (24) are provided on the floor surface,
A ceiling-type air conditioner and a floor-type air conditioner switchable air-conditioning system in which a buried duct type package air conditioner (30) is disposed in the upper space,
First and second motor-driven switching dampers (32, 34) are connected to a circuit on the air intake side of the package air conditioner,
The first switching damper (32) is connected to the rising duct, and the second switching damper (34) is connected to a duct for sucking air in the upper space,
Third and fourth motor-driven switching dampers (36, 38) are connected to the circuit on the air discharge side of the package air conditioner,
The third switching damper (36) is connected to a duct connected to the air outlet of the ceiling surface, and the fourth switching damper (38) is connected to the rising duct,
During cooling, the first and third switching dampers are opened, the second and fourth switching dampers are closed, and the air from the rising duct is passed through the package air conditioner to the air-conditioned room through the ceiling air outlet. The air after air conditioning is sucked in from the air circulation opening on the floor and returned to the packaged air conditioner via the rising duct.
During heating, the first and third switching dampers are closed and the second and fourth switching dampers are opened, and the air in the upper space is passed from the air flow opening on the floor surface via the package air conditioner and the rising duct. Supply air to the air-conditioning target room, flow the air after air conditioning from the suction port on the ceiling surface to the upper space, and return it to the packaged air conditioner .
A pair of the buried duct type packaged air conditioners are arranged in opposite directions in the upper space,
Of the pair of buried duct type packaged air conditioners, one of the buried duct type packaged air conditioners has an air suction side circuit closer to the rising duct than the first motor-driven switching damper and the other buried type. the ducted packaged air circuit of the air discharge side, air-conditioning system connecting a side close to the startup duct than the fourth motor driven switching damper. Air conditioning system of claim 1 Symbol mounting ceiling fan is installed for air agitation on the ceiling surface of the air-conditioning target chamber.

Images