WO2021105737A1 - An indoor unit for an air conditioning in a ceiling - Google Patents

An indoor unit for an air conditioning in a ceiling Download PDF

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Publication number
WO2021105737A1
WO2021105737A1 PCT/IB2019/060106 IB2019060106W WO2021105737A1 WO 2021105737 A1 WO2021105737 A1 WO 2021105737A1 IB 2019060106 W IB2019060106 W IB 2019060106W WO 2021105737 A1 WO2021105737 A1 WO 2021105737A1
Authority
WO
WIPO (PCT)
Prior art keywords
indoor unit
extension part
casing
ceiling
inlet port
Prior art date
Application number
PCT/IB2019/060106
Other languages
French (fr)
Inventor
Tetsuya Morizane
Yoshiteru Nouchi
Original Assignee
Daikin Industries (Thailand) Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daikin Industries (Thailand) Ltd. filed Critical Daikin Industries (Thailand) Ltd.
Priority to PCT/IB2019/060106 priority Critical patent/WO2021105737A1/en
Priority to CN201980102095.9A priority patent/CN114651156A/en
Publication of WO2021105737A1 publication Critical patent/WO2021105737A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0043—Indoor units, e.g. fan coil units characterised by mounting arrangements
    • F24F1/0047—Indoor units, e.g. fan coil units characterised by mounting arrangements mounted in the ceiling or at the ceiling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0011—Indoor units, e.g. fan coil units characterised by air outlets
    • F24F1/0014—Indoor units, e.g. fan coil units characterised by air outlets having two or more outlet openings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/20—Casings or covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/044—Systems in which all treatment is given in the central station, i.e. all-air systems

Definitions

  • the present invention relates to an indoor unit for an air conditioning in a ceiling.
  • An indoor unit for an air conditioning in a ceiling usually includes one inlet port and a plural of outlet ports. With such configuration, there is a case that it is difficult to supply the sufficient amount of air from outlet ports through the flexible ducts because of the limitation of the cross-section area of the ducts. If the one outlet port is formed in a rectangular shape in order to increase the amount of air, there is a case that it is difficult to connect the outlet port with the flexible duct.
  • an embodiment of the present invention provides an indoor unit for an air conditioning in a ceiling comprising: a casing including a bottom surface in which an inlet port is formed, and a plural of side surfaces in which a plural of outlet ports are formed; and connection parts disposed on some of the outlet ports to connect with flexible ducts, wherein each connection part includes an opening which is formed in an approximately oval shape on the outlet port side, and an extension part which is formed in a hollow shape to extend from the opening in a direction away from the casing.
  • the indoor unit for an air conditioning in a ceiling includes the connection parts disposed on some of the outlet ports to connect with flexible ducts.
  • each flexible duct can be connected to the indoor unit to distribute air from the indoor unit in various configuration and supply a sufficient amount of air to the air conditioning targets.
  • the opening of the connection part is formed in an approximately oval shape, the opening area of the opening is increased in comparison with in a circle shape. As such, it is possible to further increase the amount of air from the plural of outlet ports through the flexible ducts.
  • the extension part which is formed in an approximately oval hollow shape to extend from the opening in a direction away from the casing, the flexible duct can be firmly connected to the extension part in comparison with in circle hollow shape. As such, it is possible to furthermore increase the amount of air from the plural of outlet ports through the flexible ducts. Therefore, according to the embodiment of the present invention, the indoor unit for an air conditioning in a ceiling, enables to supply the sufficient amount of air from a plural of outlet ports through the flexible ducts. Moreover, since the flexible duct can be firmly connected to the extension part, it is possible to prevent air from leaking out the gap between the connection pars and the flexible ducts.
  • the extension part includes first portions which are formed in a linear shape and second portions which are formed in a curved shape.
  • the extension part since the extension part has linear portions and curved portions, the extension part can be formed easily. Moreover, when the flexible duct is installed to the extension part, the flexible duct is pulled in left and right direction of the extension part. Therefore, since the flexible duct can be more firmly connected to the extension part, it is possible to further prevent air from leaking out the gap between the connection pars and the flexible ducts.
  • the outlet port is formed in the side surface.
  • the engineer who installs the indoor unit into the ceiling can select a preferable indoor unit depending on the flexibility of a workspace, an arrangement space and/or an installation space of the indoor unit.
  • the casing has four side surfaces, and the connection parts are disposed on at least two outlet ports of the four side surfaces.
  • the connection parts required and sufficient for supplying the amount of air are disposed at the outlet ports. Therefore, it is possible to increase the amount of air from the selected outlet ports through the flexible ducts.
  • connection parts is detachable from the casing.
  • the length of the outer periphery of the extension part is equal to or more than the length of the inner periphery of the flexible duct.
  • the flexible duct can be more firmly connected to the extension part, it is possible to prevent air from leaking out the gap between the connection pars and the flexible ducts more surely.
  • the indoor unit further comprises a panel disposed under the bottom surface of the casing to cover the inlet port.
  • the panel is disposed under the bottom surface of the casing to cover the inlet port, it is possible to improve the visibility of the ceiling including the indoor unit when a user looks up the ceiling.
  • the indoor unit further comprises a drain pan, wherein the drain pan is positioned higher than the inlet port.
  • the indoor unit further comprises a heat exchanger which is located inside the casing and at the position closer to the outlet port than to the center of the casing.
  • the indoor unit further comprises a heat transfer suppressing element wherein the connection part includes a base part which covers the outlet port and the opening is formed on the base part, and the heat transfer suppressing element is disposed on an inner surface of the extension part or an inner surface of the base part. While air flows from the heat exchanger to the extension part, there is a possibility that the heat of the outside transfers to the cooling air through the inner surface of the extension part and/or the surface of the connection part.
  • the heat transfer suppressing element since a heat transfer suppressing element is disposed on an inner surface of the extension part or an inner surface of the base part, the heat transfer suppressing element can effectively prevent the heat transfer from the outside air to the cooled air inside the indoor unit.
  • the inlet port is formed so that the inlet port is located along the outer periphery of the panel when viewed from the bottom of the indoor unit.
  • the indoor unit can suck the sufficient amount of air through the inlet port.
  • the extension part when viewed from a direction where the extension part is extended, includes: an upper portion which is formed in a linear shape at the top of the extension part, a lower portion which is formed in a linear shape at the bottom of the extension part and parallel to the upper portion, a left curved portion which is formed in a curved shape at the left side of the extension part so as to be bent outward, a right curved portion which is formed in a curved shape at the right side of the extension part so as to be bent outward, and line portions which are formed in a linear shape to connect between the upper portion and the left curved portion, between the left curved portion and the lower portion, between the lower portion and the right curved portion, and between the right curved portion and the upper portion.
  • the extension part when viewed from a direction where the extension part is extended, is configured of the linear elements which are the upper portion, the lower portion and the line portions as well as the curved elements which are the left curved portion and the right curved portion, it is easy to form the extension part and the flexible duct can be furthermore firmly connected to the extension part.
  • FIG.1 is a schematic block diagram of an indoor unit 1 for an air-conditioning in a ceiling, according to an embodiment of the present invention
  • FIG.2 is an explanation view of the state that four flexible ducts 60 are connected to the connection parts 50;
  • FIG.3a is a perspective view of the indoor unit 1 without the connection part 50
  • FIG.3b is a perspective view of the indoor unit 1 with at least one connection part 50
  • FIG.4a and FIG.4b are explanation views of heat transfer suppressing elements 58;
  • FIG.5a is a cross sectional taken along line Va - Va of FIG.2, and FIG.5b is a cross sectional taken along line Vb - Vb of FIG.5 a;
  • FIG.6a and FIG.6b are explanation views of the state that the indoor unit 1 is installed to the ceiling.
  • an indoor unit in the embodiment is an indoor unit for an air conditioning in a ceiling, including an indoor unit for an air conditioning embedded in the ceiling and an indoor unit for an air conditioning which is suspended in the ceiling.
  • the embodiment will be described by using indoor unit for an air conditioning embedded in the ceiling.
  • an indoor unit 1 for an air-conditioning in a ceiling includes a casing 10 which comprises a bottom surface 20 and a plural of side surfaces 30, connection parts 50 disposed on some of the outlet ports 32 to connect with flexible ducts 60, and the heat exchanger 70 which cools air from the inlet port 22.
  • the shape of the indoor unit 1 is especially not limited, but, for example, the number of side surfaces 30 is equal to or more than 4. In this embodiment, the feature of the indoor unit 1 will be explained by using the indoor unit 1 which is formed approximately rectangular parallelepiped shape (namely, the number of the side surfaces 30 is 4).
  • the indoor unit 1 is a cassette-type ceiling mounted indoor unit.
  • the indoor unit 1 supplies air which comes out from the outlet ports 32 of the air conditioning to the air conditioning target space in the room (not shown) through the flexible ducts 60.
  • the flexible ducts 60 are disposed in the spaces (ex. Ceiling chamber) between the roof and ceilings, wall back spaces, underfloor spaces, etc. Additionally, air which comes out from the air conditioning returns from the room including the air conditioning target space to the inlet port 22 of the air conditioning, thereby conditioned air is circulated.
  • the casing 10 comprises the bottom surface 20 in which the inlet port 22 is formed, and four side surfaces 30 in which four outlet ports are formed.
  • the casing 10 also comprises a filter to cover the inlet port 22 so as to prevent that dust in the room is sucked through the inlet port 22 with the air.
  • the casing 10 is formed from stainless steel.
  • the material of the casing 10 is not limited particular, on condition that the strength of the casing 10 is held.
  • the inlet port 22 is formed at the center of the bottom surface
  • the inlet port 22 is an opening that is formed in an approximately rectangular shape so as to increase the amount of sucked air by enlarging the opening area of the inlet port 22.
  • the sucked air is sucked from the inlet port 22 by operating the turbo fan 12 which is located at the center of the casing 10 when viewed from the above.
  • the indoor unit 1 includes a panel 14 disposed under the bottom surface 20 of the casing 10 so as to cover the inlet port 22. As such, the panel 14 enables to improve the visibility of the ceiling including the indoor unit 1 when a user looks up the ceiling.
  • the inlet port 22 is formed so that the inlet port 22 is located along the outer periphery of the panel 14 when viewed from the bottom of the indoor unit 1. Thereby, even in the state that the panel 14 is disposed to cover the inlet port 22, the inlet port 22 enables to have a sufficient large opening in the bottom surface 20 in order to suck the sufficient amount of air through the inlet port 22.
  • an outlet port 32 is formed in each side surface 30 in advance so that the engineer does not need to create the outlet port 32 when the engineer installs the indoor unit 1 into the ceiling.
  • the number of outlet ports 32 in one side surface 30 is not especially limited, the preferable number is 1.
  • the outlet port 32 is formed in the rectangular shape in order to increase the amount of air from the outlet port 32.
  • connection part 50 or a cover plate 40 which is formed in a plate shape is attached to the outlet port 32 in advance, so as to cover the outlet port 32, and prevent the leakage of the cooling air, and secure the strength of the side surface 30.
  • the material of the connection part 50 and the cover plate 40 is not limited only if the sufficient strength of the casing 10 is secured and the connection part 50 and the cover plate 40 are formed from stainless steel preferably.
  • the cover plate 40 is used to cover the outlet port 32 when the outlet port 32 does not connect to the flexible duct 60.
  • connection part 50 includes an opening 52 which is formed at a substantially center position of the connection part 50 on the outlet port side, a base part 54 which is formed to surround the opening 52 in the whole circumference direction, and an extension part 56 which is formed in an approximately oval hollow shape to extend from the opening 52 in a direction away from the casing 10.
  • connection parts 50 are not specifically limited, however, the connection parts 50 are preferably disposed on at least two outlet ports 32.
  • the indoor unit can supply the sufficient amount of air to the air conditioning target.
  • connection part 50 is detachable from the casing 10, so as to attach/detach the connection part 50 and improve the operability of the installation.
  • the opening 52 is formed in an approximately oval shape so that the opening area of the opening 52 is increased in comparison with a circular opening. As such, the opening 52 enables to increase the amount of air from the outlet port 32.
  • the extension part 56 is formed in an approximately oval hollow shape to extend from the opening 52 in a direction away from the casing 10, so that the flexible duct 60 can be firmly connected to the extension part 56.
  • the extension part 56 when viewed from a direction where the extension part 56 is extended, includes: an upper portion 56a which is formed in a linear shape at the top of the extension part 56; a lower portion 56b which is formed in a linear shape at the bottom of the extension part 56 and parallel to the upper portion 56a; a left curved portion 56c which is formed in a curved shape at the left side of the extension part 56 so as to be bent outward; a right curved portion 56d which is formed in a curved shape at the right side of the extension part 56 so as to be bent outward.
  • the extension part 56 includes line portions 56e which are formed in a linear shape to connect between the upper portion 56a and the left curved portion 56c, between the left curved portion 56c and the lower portion 56b, between the lower portion 56b and the right curved portion 56d, and between the right curved portion 56d and the upper portion 56a.
  • extension part 56 is configured of the linear elements which are the upper portion 56a, the lower portion 56b and the line portions 56e as well as the curved elements which are the left curved portion 56c and the right curved portion 56d, it is easily to form the extension part 56.
  • the heat transfer suppressing element 58 is disposed on an inner surface of the extension part 56 and/or an inner surface of the base part 54. Firstly, the heat transfer suppressing element 58 can effectively prevent the heat transfer from the outside of air to the cooled air inside the indoor unit 1. Secondly, since the generation of the dew condensation water is prevented by the heat transfer suppressing element 58, the heat transfer suppressing element 58 enables to reduce the possibility of the dew condensation water to be flowed to the flexible duct 60.
  • the material of the heat transfer suppressing element 58 is not specifically limited, however, the material is preferably urethane foam. Additionally, as shown in FIG.4b, the heat transfer suppressing element 58 may be disposed either on an inner surface of the extension part 56 or an inner surface of the base part 54.
  • the extension part 56 is inserted into the tube end opening 62 of the flexible duct 60, when the indoor unit 1 is installed in the arranging space. Namely, since the flexible duct 60 has a flexibility, the flexible duct 60 is connected with the extension part 56 by deforming the tube end opening 62 of the flexible duct 60 so as to fit the shape of the outer periphery of the extension part 56.
  • the flexible duct 60 is an airtight flexible hollow tube made of the aluminum sheet/foil or the synthetic resin, which is connected with the extension part 56.
  • the shape of the flexible duct 60 is maintained in the hollow shape by using the coil composed of the steel wire.
  • the length of the outer periphery of the extension part 56 is equal to or more than the length of the inner periphery of the flexible duct 60, so that the flexible duct 60 is more firmly connected to the extension part 56.
  • the relation between the outer periphery of the extension part 56 and the inner periphery of the flexible duct 60, enables to prevent air from leaking out the gap between the connection parts 56 and the flexible ducts 60 more surely.
  • the indoor unit 1 includes a heat exchanger 70 which is located inside the casing 10 so as to surround the inlet port 22 of the bottom surface 20 and to be arranged along the side surfaces 30 when viewed from the above of the indoor unit 1. Moreover, the heat exchanger 70 is formed in a vertical wall shape surrounding a circumference of the inlet port 22. The heat exchanger 70 is located at the position closer to the outlet port 32 than to the center of the casing 10. During the operation in a cooling mode of the air conditioning, air from the inlet port 22 is cooled by the refrigerant which flows in the heat exchanger 70, so that the heat exchanger 70 is disposed in the air passage from the inlet port 22 to the outlet port 32. Cooling air flows out of the indoor unit 1 through the outlet ports 32, namely through the flexible ducts 60. As such, the heat exchanger 70 effectively enables to carry out heat exchange between the heat exchanger 70 and air.
  • the indoor unit 1 includes a drain pan 24 at the lower portion of the casing 10, so as to collect the dew condensation water which is generated and drops during the operation in a cooling mode of the air conditioning.
  • the drain pan 24 is arranged to cover the whole lower portion of the heat exchanger 70.
  • the drain pan 24 is positioned higher than the inlet port 22. As such, the drain pan 24 enables to collect the dew condensation water by dropping the dew condensation water on the drain pan 24. Thereby, the indoor unit 1 prevents the dew condensation water from dropping through the inlet port 22. Moreover, the drain pan 24 is positioned lower than the opening 52 of the connection part 50, so as to prevent the dew condensation water from flowing out into the flexible duct 60. The dew condensation water which is collected on the drain pan 24 is discharged through the discharging pipe (not shown) to outside of the indoor unit 1.
  • FIG.6a is an explanation view of the state that the indoor unit 1 ’ is installed to the ceiling 81 in the condition that the panel 14 can be viewed from the user who stays in the room 80 when looking up from below.
  • the engineer who installs the indoor unit 1 ’ into the ceiling 81 selects a preferable indoor unit G depending on the flexibility of a workspace, an arrangement space and/or an installation space of the indoor unit G .
  • the engineer designs the layout of the flexible ducts 60 from the indoor unit G to the ceiling outlet ports 84.
  • the selected indoor unit G with the panel 14, the fdter (not shown) which removes the dust, the cover plates 40 and the connection parts 50 is installed in the predetermined position of the ceiling 81 by the fixing means such as screw. As such, it is easily to attach the flexible ducts 60 to the connection parts 50 since the cover plates 40 and the connection parts 50 are attached to the outlet ports 32.
  • the flexible ducts 60 are connected to the extension parts 56 so that each extension part 56 is inserted into the tube end opening 62 of the flexible duct 60.
  • the flexible duct 60 in which the extension part 56 is inserted may be banded by a binding band (not shown).
  • the flexible duct 60 is pulled in left and right direction of the extension part 56.
  • the flexible duct 60 can be more firmly connected to the extension part 56, it is possible to further prevent air from leaking out the gap between the connection pars and the flexible ducts 60.
  • the flexible duct 60 has a flexibility
  • the flexible duct 60 is connected with the extension part 56 by deforming the tube end opening 62 of the flexible duct 60 so as to fit the shape of the outer periphery of the extension part 56.
  • the engineer who installs the indoor unit 1 ’ into the ceiling can easily attach the flexible ducts 60 to the extension parts 56. Therefore, according to the embodiment, the indoor unit G for an air conditioning embedded in a ceiling 81, enables to supply the sufficient amount of air from a plural of outlet ports 32 through the flexible ducts 60.
  • FIG.6b is an explanation view of the state that the indoor unit 1 ” is installed to the ceiling chamber 86 between the roof and ceiling 81 in the condition that the whole indoor unit 1” can’t be viewed from the user who stays in the room 80 when looking up from below. Namely, the indoor unit 1” is suspended in the ceiling chamber 86.
  • the indoor unit 1 does not comprise the panel 14 and a filter 16 disposed at the inlet port 22 is exposed.
  • the engineer who installs the indoor unit 1” into the ceiling 81 selects a preferable indoor unit 1” and designs the layout of the flexible ducts 60 from the indoor unit 1” to the ceiling outlet ports 84.
  • the selected indoor unit 1” with the filter 16, the cover plates 40 and the connection parts 50 is installed in the predetermined position of the ceiling 81 by the fixing means such as suspender and screw.
  • the flexible ducts 60 are connected to the extension parts 56 so that each extension part 56 is inserted into the tube end opening 62 of the flexible duct 60.
  • the flexible duct 60 in which the extension part 56 is inserted may be banded by a binding band (not shown).
  • the indoor unit 1 for an air conditioning in a ceiling 81, enables to supply the sufficient amount of air from a plural of outlet ports 32 through the flexible ducts 60, and to secure sufficient strength of the outlet port 32.
  • the flexible duct 60 can be firmly connected to the extension part 56, it is possible to prevent air from leaking out the gap between the connection pars and the flexible ducts 60.
  • heat transfer suppressing element 60 flexible duct 62 tube end opening 70 heat exchanger 80 room
  • ceiling inlet port 84 ceiling outlet port 86 ceiling chamber

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Duct Arrangements (AREA)

Abstract

The present invention discloses an indoor unit 1 for an air conditioning in a ceiling comprising: a casing 10 including a bottom surface 20 in which an inlet port 22 is formed, and a plural of side surfaces 30 in which a plural of outlet ports 32 are formed; and connection parts 50 disposed on some of the outlet ports 32 to connect with flexible ducts 60. Each connection part 50 includes an opening 52 which is formed in an approximately oval shape on the outlet port side, and an extension part 56 which is formed in an approximately oval hollow shape to extend from the opening 52 in a direction away from the casing 10.

Description

AN INDOOR UNIT FOR AN AIR CONDITIONING IN A CEILING
FIELD OF INVENTION
The present invention relates to an indoor unit for an air conditioning in a ceiling. BACKGROUND OF THE INVENTION
An indoor unit for an air conditioning in a ceiling usually includes one inlet port and a plural of outlet ports. With such configuration, there is a case that it is difficult to supply the sufficient amount of air from outlet ports through the flexible ducts because of the limitation of the cross-section area of the ducts. If the one outlet port is formed in a rectangular shape in order to increase the amount of air, there is a case that it is difficult to connect the outlet port with the flexible duct.
Therefore, an indoor unit for an air conditioning in a ceiling, that supplies the sufficient amount of air from a plural of outlet ports through the flexible ducts, and that is possible to connect the outlet port with the flexible duct, is required. SUMMARY OF THE INVENTION
It is an objective of the present inventions to provide an indoor unit for an air conditioning in a ceiling, which supplies the sufficient amount of air from a plural of outlet ports through the flexible ducts.
In order to achieve the above objective, an embodiment of the present invention provides an indoor unit for an air conditioning in a ceiling comprising: a casing including a bottom surface in which an inlet port is formed, and a plural of side surfaces in which a plural of outlet ports are formed; and connection parts disposed on some of the outlet ports to connect with flexible ducts, wherein each connection part includes an opening which is formed in an approximately oval shape on the outlet port side, and an extension part which is formed in a hollow shape to extend from the opening in a direction away from the casing.
According to the embodiment of the present invention, firstly, the indoor unit for an air conditioning in a ceiling includes the connection parts disposed on some of the outlet ports to connect with flexible ducts. As such, each flexible duct can be connected to the indoor unit to distribute air from the indoor unit in various configuration and supply a sufficient amount of air to the air conditioning targets. Additionally, since the opening of the connection part is formed in an approximately oval shape, the opening area of the opening is increased in comparison with in a circle shape. As such, it is possible to further increase the amount of air from the plural of outlet ports through the flexible ducts. Moreover, since the extension part which is formed in an approximately oval hollow shape to extend from the opening in a direction away from the casing, the flexible duct can be firmly connected to the extension part in comparison with in circle hollow shape. As such, it is possible to furthermore increase the amount of air from the plural of outlet ports through the flexible ducts. Therefore, according to the embodiment of the present invention, the indoor unit for an air conditioning in a ceiling, enables to supply the sufficient amount of air from a plural of outlet ports through the flexible ducts. Moreover, since the flexible duct can be firmly connected to the extension part, it is possible to prevent air from leaking out the gap between the connection pars and the flexible ducts. In the indoor unit of the embodiment of the present invention, the extension part includes first portions which are formed in a linear shape and second portions which are formed in a curved shape.
According to the embodiment of the present invention, since the extension part has linear portions and curved portions, the extension part can be formed easily. Moreover, when the flexible duct is installed to the extension part, the flexible duct is pulled in left and right direction of the extension part. Therefore, since the flexible duct can be more firmly connected to the extension part, it is possible to further prevent air from leaking out the gap between the connection pars and the flexible ducts.
In the indoor unit of the embodiment of the present invention, the outlet port is formed in the side surface.
According to the embodiment of the present invention, since the outlet port is formed in the side surface, the engineer who installs the indoor unit into the ceiling can select a preferable indoor unit depending on the flexibility of a workspace, an arrangement space and/or an installation space of the indoor unit. In the indoor unit of the embodiment of the present invention, the casing has four side surfaces, and the connection parts are disposed on at least two outlet ports of the four side surfaces. According to the embodiment of the present invention, since the casing has four side surfaces, it is possible to install the indoor unit to the comer of the arrangement space . Moreover, by selecting the preferable connection parts which do not face the walls of the comer of the arrangement space, the connection parts required and sufficient for supplying the amount of air are disposed at the outlet ports. Therefore, it is possible to increase the amount of air from the selected outlet ports through the flexible ducts.
In the indoor unit of the embodiment of the present invention, at least one of the connection parts is detachable from the casing.
According to the embodiment of the present invention, it is possible to attach/detach the at least one of the connection parts and improve the operability of the installation.
In the indoor unit of the embodiment of the present invention, the length of the outer periphery of the extension part is equal to or more than the length of the inner periphery of the flexible duct.
According to the embodiment of the present invention, since the flexible duct can be more firmly connected to the extension part, it is possible to prevent air from leaking out the gap between the connection pars and the flexible ducts more surely.
In the indoor unit of the embodiment of the present invention, the indoor unit further comprises a panel disposed under the bottom surface of the casing to cover the inlet port.
According to the embodiment of the present invention, since the panel is disposed under the bottom surface of the casing to cover the inlet port, it is possible to improve the visibility of the ceiling including the indoor unit when a user looks up the ceiling.
In the indoor unit of the embodiment of the present invention, the indoor unit further comprises a drain pan, wherein the drain pan is positioned higher than the inlet port.
In the indoor unit of the embodiment of the present invention, the indoor unit further comprises a heat exchanger which is located inside the casing and at the position closer to the outlet port than to the center of the casing.
In the indoor unit of the embodiment of the present invention, the indoor unit further comprises a heat transfer suppressing element wherein the connection part includes a base part which covers the outlet port and the opening is formed on the base part, and the heat transfer suppressing element is disposed on an inner surface of the extension part or an inner surface of the base part. While air flows from the heat exchanger to the extension part, there is a possibility that the heat of the outside transfers to the cooling air through the inner surface of the extension part and/or the surface of the connection part.
According to the embodiment of the present invention, since a heat transfer suppressing element is disposed on an inner surface of the extension part or an inner surface of the base part, the heat transfer suppressing element can effectively prevent the heat transfer from the outside air to the cooled air inside the indoor unit.
As a result, since the generation of the dew condensation water is prevented by the heat transfer suppressing element, it is possible to reduce the possibility of the dew condensation water to be flowed to the flexible duct.
In the indoor unit of the embodiment of the present invention, the inlet port is formed so that the inlet port is located along the outer periphery of the panel when viewed from the bottom of the indoor unit.
According to the embodiment of the present invention, even in the state that the panel is disposed to cover the inlet port, it is possible to form the inlet port which has a sufficient large opening in the bottom surface. Therefore, the indoor unit can suck the sufficient amount of air through the inlet port.
In the indoor unit of the embodiment of the present invention, the extension part, when viewed from a direction where the extension part is extended, includes: an upper portion which is formed in a linear shape at the top of the extension part, a lower portion which is formed in a linear shape at the bottom of the extension part and parallel to the upper portion, a left curved portion which is formed in a curved shape at the left side of the extension part so as to be bent outward, a right curved portion which is formed in a curved shape at the right side of the extension part so as to be bent outward, and line portions which are formed in a linear shape to connect between the upper portion and the left curved portion, between the left curved portion and the lower portion, between the lower portion and the right curved portion, and between the right curved portion and the upper portion.
According to the embodiment of the present invention, since the extension part, when viewed from a direction where the extension part is extended, is configured of the linear elements which are the upper portion, the lower portion and the line portions as well as the curved elements which are the left curved portion and the right curved portion, it is easy to form the extension part and the flexible duct can be furthermore firmly connected to the extension part. BRIEF DESCRIPTION OF DRAWINGS
The principle of the present invention and its advantages will become apparent in the following description taking in consideration with the accompanying drawings in which:
FIG.1 is a schematic block diagram of an indoor unit 1 for an air-conditioning in a ceiling, according to an embodiment of the present invention;
FIG.2 is an explanation view of the state that four flexible ducts 60 are connected to the connection parts 50;
FIG.3a is a perspective view of the indoor unit 1 without the connection part 50, and FIG.3b is a perspective view of the indoor unit 1 with at least one connection part 50; FIG.4a and FIG.4b are explanation views of heat transfer suppressing elements 58;
FIG.5a is a cross sectional taken along line Va - Va of FIG.2, and FIG.5b is a cross sectional taken along line Vb - Vb of FIG.5 a; and
FIG.6a and FIG.6b are explanation views of the state that the indoor unit 1 is installed to the ceiling.
DETAIFED DESCTIPTION OF EMBODIMENTS OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to FIG. 1 to FIG.6b. As an indoor unit in the embodiment is an indoor unit for an air conditioning in a ceiling, including an indoor unit for an air conditioning embedded in the ceiling and an indoor unit for an air conditioning which is suspended in the ceiling. The embodiment will be described by using indoor unit for an air conditioning embedded in the ceiling.
As shown in FIG. 1 to FIG3b, an indoor unit 1 for an air-conditioning in a ceiling (not shown) includes a casing 10 which comprises a bottom surface 20 and a plural of side surfaces 30, connection parts 50 disposed on some of the outlet ports 32 to connect with flexible ducts 60, and the heat exchanger 70 which cools air from the inlet port 22. The shape of the indoor unit 1 is especially not limited, but, for example, the number of side surfaces 30 is equal to or more than 4. In this embodiment, the feature of the indoor unit 1 will be explained by using the indoor unit 1 which is formed approximately rectangular parallelepiped shape (namely, the number of the side surfaces 30 is 4). The indoor unit 1 is a cassette-type ceiling mounted indoor unit. The indoor unit 1 supplies air which comes out from the outlet ports 32 of the air conditioning to the air conditioning target space in the room (not shown) through the flexible ducts 60. The flexible ducts 60 are disposed in the spaces (ex. Ceiling chamber) between the roof and ceilings, wall back spaces, underfloor spaces, etc. Additionally, air which comes out from the air conditioning returns from the room including the air conditioning target space to the inlet port 22 of the air conditioning, thereby conditioned air is circulated.
As shown in FIG.3a, the casing 10 comprises the bottom surface 20 in which the inlet port 22 is formed, and four side surfaces 30 in which four outlet ports are formed. The casing 10 also comprises a filter to cover the inlet port 22 so as to prevent that dust in the room is sucked through the inlet port 22 with the air. In the embodiment, the casing 10 is formed from stainless steel. The material of the casing 10 is not limited particular, on condition that the strength of the casing 10 is held. In the bottom surface 20, the inlet port 22 is formed at the center of the bottom surface
20. The inlet port 22 is an opening that is formed in an approximately rectangular shape so as to increase the amount of sucked air by enlarging the opening area of the inlet port 22. The sucked air is sucked from the inlet port 22 by operating the turbo fan 12 which is located at the center of the casing 10 when viewed from the above. As shown in FIG.1 and FIG.2, the indoor unit 1 includes a panel 14 disposed under the bottom surface 20 of the casing 10 so as to cover the inlet port 22. As such, the panel 14 enables to improve the visibility of the ceiling including the indoor unit 1 when a user looks up the ceiling.
Also, the inlet port 22 is formed so that the inlet port 22 is located along the outer periphery of the panel 14 when viewed from the bottom of the indoor unit 1. Thereby, even in the state that the panel 14 is disposed to cover the inlet port 22, the inlet port 22 enables to have a sufficient large opening in the bottom surface 20 in order to suck the sufficient amount of air through the inlet port 22.
As shown in FIG.3a, in this embodiment, an outlet port 32 is formed in each side surface 30 in advance so that the engineer does not need to create the outlet port 32 when the engineer installs the indoor unit 1 into the ceiling. Although the number of outlet ports 32 in one side surface 30 is not especially limited, the preferable number is 1. The outlet port 32 is formed in the rectangular shape in order to increase the amount of air from the outlet port 32.
As shown in FIG.3b, a connection part 50 or a cover plate 40 which is formed in a plate shape is attached to the outlet port 32 in advance, so as to cover the outlet port 32, and prevent the leakage of the cooling air, and secure the strength of the side surface 30. The material of the connection part 50 and the cover plate 40 is not limited only if the sufficient strength of the casing 10 is secured and the connection part 50 and the cover plate 40 are formed from stainless steel preferably. The cover plate 40 is used to cover the outlet port 32 when the outlet port 32 does not connect to the flexible duct 60.
As shown in FIG.4a, and FIG.4b, the connection part 50 includes an opening 52 which is formed at a substantially center position of the connection part 50 on the outlet port side, a base part 54 which is formed to surround the opening 52 in the whole circumference direction, and an extension part 56 which is formed in an approximately oval hollow shape to extend from the opening 52 in a direction away from the casing 10.
The number of the connection parts 50 is not specifically limited, however, the connection parts 50 are preferably disposed on at least two outlet ports 32. By selecting the preferable outlet ports 32 which do not face the walls of the comer of the arrangement space and disposing connection parts 50 at the outlet ports 32, the indoor unit can supply the sufficient amount of air to the air conditioning target.
Also, the connection part 50 is detachable from the casing 10, so as to attach/detach the connection part 50 and improve the operability of the installation. The opening 52 is formed in an approximately oval shape so that the opening area of the opening 52 is increased in comparison with a circular opening. As such, the opening 52 enables to increase the amount of air from the outlet port 32.
The extension part 56 is formed in an approximately oval hollow shape to extend from the opening 52 in a direction away from the casing 10, so that the flexible duct 60 can be firmly connected to the extension part 56.
In particular, the extension part 56, when viewed from a direction where the extension part 56 is extended, includes: an upper portion 56a which is formed in a linear shape at the top of the extension part 56; a lower portion 56b which is formed in a linear shape at the bottom of the extension part 56 and parallel to the upper portion 56a; a left curved portion 56c which is formed in a curved shape at the left side of the extension part 56 so as to be bent outward; a right curved portion 56d which is formed in a curved shape at the right side of the extension part 56 so as to be bent outward. Furthermore, the extension part 56 includes line portions 56e which are formed in a linear shape to connect between the upper portion 56a and the left curved portion 56c, between the left curved portion 56c and the lower portion 56b, between the lower portion 56b and the right curved portion 56d, and between the right curved portion 56d and the upper portion 56a.
Since the extension part 56 is configured of the linear elements which are the upper portion 56a, the lower portion 56b and the line portions 56e as well as the curved elements which are the left curved portion 56c and the right curved portion 56d, it is easily to form the extension part 56.
As shown in FIG.4a and FIG.4b, in this embodiment, the heat transfer suppressing element 58 is disposed on an inner surface of the extension part 56 and/or an inner surface of the base part 54. Firstly, the heat transfer suppressing element 58 can effectively prevent the heat transfer from the outside of air to the cooled air inside the indoor unit 1. Secondly, since the generation of the dew condensation water is prevented by the heat transfer suppressing element 58, the heat transfer suppressing element 58 enables to reduce the possibility of the dew condensation water to be flowed to the flexible duct 60. The material of the heat transfer suppressing element 58 is not specifically limited, however, the material is preferably urethane foam. Additionally, as shown in FIG.4b, the heat transfer suppressing element 58 may be disposed either on an inner surface of the extension part 56 or an inner surface of the base part 54.
The extension part 56 is inserted into the tube end opening 62 of the flexible duct 60, when the indoor unit 1 is installed in the arranging space. Namely, since the flexible duct 60 has a flexibility, the flexible duct 60 is connected with the extension part 56 by deforming the tube end opening 62 of the flexible duct 60 so as to fit the shape of the outer periphery of the extension part 56.
The flexible duct 60 is an airtight flexible hollow tube made of the aluminum sheet/foil or the synthetic resin, which is connected with the extension part 56. In the case that the outer of the flexible duct 60 is soft and hardly maintains a hollow shape, the shape of the flexible duct 60 is maintained in the hollow shape by using the coil composed of the steel wire.
The length of the outer periphery of the extension part 56 is equal to or more than the length of the inner periphery of the flexible duct 60, so that the flexible duct 60 is more firmly connected to the extension part 56. The relation between the outer periphery of the extension part 56 and the inner periphery of the flexible duct 60, enables to prevent air from leaking out the gap between the connection parts 56 and the flexible ducts 60 more surely.
As shown in FIG.5a and FIG.5b, the indoor unit 1 includes a heat exchanger 70 which is located inside the casing 10 so as to surround the inlet port 22 of the bottom surface 20 and to be arranged along the side surfaces 30 when viewed from the above of the indoor unit 1. Moreover, the heat exchanger 70 is formed in a vertical wall shape surrounding a circumference of the inlet port 22. The heat exchanger 70 is located at the position closer to the outlet port 32 than to the center of the casing 10. During the operation in a cooling mode of the air conditioning, air from the inlet port 22 is cooled by the refrigerant which flows in the heat exchanger 70, so that the heat exchanger 70 is disposed in the air passage from the inlet port 22 to the outlet port 32. Cooling air flows out of the indoor unit 1 through the outlet ports 32, namely through the flexible ducts 60. As such, the heat exchanger 70 effectively enables to carry out heat exchange between the heat exchanger 70 and air.
As shown in FIG.5b, the indoor unit 1 includes a drain pan 24 at the lower portion of the casing 10, so as to collect the dew condensation water which is generated and drops during the operation in a cooling mode of the air conditioning. The drain pan 24 is arranged to cover the whole lower portion of the heat exchanger 70.
The drain pan 24 is positioned higher than the inlet port 22. As such, the drain pan 24 enables to collect the dew condensation water by dropping the dew condensation water on the drain pan 24. Thereby, the indoor unit 1 prevents the dew condensation water from dropping through the inlet port 22. Moreover, the drain pan 24 is positioned lower than the opening 52 of the connection part 50, so as to prevent the dew condensation water from flowing out into the flexible duct 60. The dew condensation water which is collected on the drain pan 24 is discharged through the discharging pipe (not shown) to outside of the indoor unit 1.
Next, the method for installing the indoor unit to the ceiling with reference to FIG. 6a and FIG.6b will be provided.
(CASE1) The condition that the panel 14 can be viewed from the user who stays in the room 80 when looking up from below
FIG.6a is an explanation view of the state that the indoor unit 1 ’ is installed to the ceiling 81 in the condition that the panel 14 can be viewed from the user who stays in the room 80 when looking up from below.
In this case, air from the room 80 is directly sucked through the inlet port 22 which is located along the outer periphery of the panel 14. And then, after air is cooled by the heat exchanger 70, the cooling air is supplied through the flexible ducts 60 to ceiling outlet ports 84.
Firstly, the engineer who installs the indoor unit 1 ’ into the ceiling 81 selects a preferable indoor unit G depending on the flexibility of a workspace, an arrangement space and/or an installation space of the indoor unit G . At the same time, the engineer designs the layout of the flexible ducts 60 from the indoor unit G to the ceiling outlet ports 84. Secondly, the selected indoor unit G with the panel 14, the fdter (not shown) which removes the dust, the cover plates 40 and the connection parts 50, is installed in the predetermined position of the ceiling 81 by the fixing means such as screw. As such, it is easily to attach the flexible ducts 60 to the connection parts 50 since the cover plates 40 and the connection parts 50 are attached to the outlet ports 32.
Finally, the flexible ducts 60 are connected to the extension parts 56 so that each extension part 56 is inserted into the tube end opening 62 of the flexible duct 60. Moreover, for the purpose of firmly fastening the flexible duct 60 and the extension part 56, the flexible duct 60 in which the extension part 56 is inserted may be banded by a binding band (not shown). In particular, when the flexible duct 60 is installed to the extension part 56, the flexible duct 60 is pulled in left and right direction of the extension part 56. As such, since the flexible duct 60 can be more firmly connected to the extension part 56, it is possible to further prevent air from leaking out the gap between the connection pars and the flexible ducts 60.
Moreover, since the flexible duct 60 has a flexibility, the flexible duct 60 is connected with the extension part 56 by deforming the tube end opening 62 of the flexible duct 60 so as to fit the shape of the outer periphery of the extension part 56. As such, even if a workspace, an arrangement space and/or an installation space of the indoor unit 1 ’ are limited, the engineer who installs the indoor unit 1 ’ into the ceiling can easily attach the flexible ducts 60 to the extension parts 56. Therefore, according to the embodiment, the indoor unit G for an air conditioning embedded in a ceiling 81, enables to supply the sufficient amount of air from a plural of outlet ports 32 through the flexible ducts 60. Moreover, since the flexible duct 60 can be firmly connected to the extension part 56, it is possible to prevent air from leaking out the gap between the connection pars and the flexible ducts 60. (CASE2) The condition that the whole indoor unit 1” can’t be viewed from the user who stays in the room 80 when looking up from below.
FIG.6b is an explanation view of the state that the indoor unit 1 ” is installed to the ceiling chamber 86 between the roof and ceiling 81 in the condition that the whole indoor unit 1” can’t be viewed from the user who stays in the room 80 when looking up from below. Namely, the indoor unit 1” is suspended in the ceiling chamber 86.
In this case, air from the room 80 is sucked from the ceiling chamber 86 through the inlet port 22 after air from the room 80 is sucked to a ceiling chamber 86 from the ceiling inlet ports 82 which is provided with the ceiling 81. And then, after air is cooled by the heat exchanger 70, the cooling air is supplied through the flexible ducts 60 to ceiling outlet ports 84.
The indoor unit 1” does not comprise the panel 14 and a filter 16 disposed at the inlet port 22 is exposed. Firstly, as with CASE1, the engineer who installs the indoor unit 1” into the ceiling 81 selects a preferable indoor unit 1” and designs the layout of the flexible ducts 60 from the indoor unit 1” to the ceiling outlet ports 84.
Secondly, the selected indoor unit 1” with the filter 16, the cover plates 40 and the connection parts 50, is installed in the predetermined position of the ceiling 81 by the fixing means such as suspender and screw.
Finally, the flexible ducts 60 are connected to the extension parts 56 so that each extension part 56 is inserted into the tube end opening 62 of the flexible duct 60. Moreover, the flexible duct 60 in which the extension part 56 is inserted may be banded by a binding band (not shown). As with CASE 1 , according to the embodiment, the indoor unit 1 ” for an air conditioning in a ceiling 81, enables to supply the sufficient amount of air from a plural of outlet ports 32 through the flexible ducts 60, and to secure sufficient strength of the outlet port 32. Moreover, since the flexible duct 60 can be firmly connected to the extension part 56, it is possible to prevent air from leaking out the gap between the connection pars and the flexible ducts 60. Although specific embodiments of the invention have been disclosed and described as well as illustrated in the companying drawings, it is simply for the purpose of better understanding of the principle of the present invention and it is not as a limitation of the scope and spirit of the teaching of the present invention. Adaption and modification to various structures such as design or material of the invention, mounting mechanism of various parts and elements or embodiments are possible and apparent to a skilled person without departing from the scope of the present invention which is to be determined by the claims.
List of reference:
1, G, 1” indoor unit 10 casing
12 turbo fan
14 panel
16 filter 20 bottom surface 22 inlet port 24 drain pan 30 side surface 32 outlet port
40 cover plate 50 connection part 52 opening 54 base part 56 extension part
56a upper portion 56b lower portion 56c left curved portion 56d right curved portion 56e line portion
58 heat transfer suppressing element 60 flexible duct 62 tube end opening 70 heat exchanger 80 room
81 ceiling
82 ceiling inlet port 84 ceiling outlet port 86 ceiling chamber

Claims

1. An indoor unit for an air conditioning in a ceiling comprising: a casing including a bottom surface in which an inlet port is formed, and a plural of side surfaces in which a plural of outlet ports are formed; and connection parts disposed on some of the outlet ports to connect with flexible ducts, wherein each connection part includes an opening which is formed in an approximately oval shape on the outlet port side, and an extension part which is formed in a hollow shape to extend from the opening in a direction away from the casing.
2. The indoor unit of claim 1, wherein the extension part includes first portions which are formed in a linear shape and second portions which are formed in a curved shape.
3. The indoor unit of claim 1 or claim 2, wherein the outlet port is formed in the side surface.
4. The indoor unit of claim 3, wherein the casing has four side surfaces, and wherein the connection parts are disposed on at least two outlet ports of the four side surfaces.
5. The indoor unit of any one of claims 1 to 4, wherein at least one of the connection parts is detachable from the casing.
6. The indoor unit of any one of claims 1 to 5, wherein the length of the outer periphery of the extension part is equal to or more than the length of the inner periphery of the flexible duct.
7. The indoor unit of any one of claims 1 to 6, further comprising a panel disposed under the bottom surface of the casing to cover the inlet port.
8. The indoor unit of any one of claims 1 to 7, further comprising a drain pan, wherein the drain pan is positioned higher than the inlet port.
9. The indoor unit of any one of claims 1 to 8, further comprising a heat exchanger which is located inside the casing and at the position closer to the outlet port than to the center of the casing.
10. The indoor unit of any one of claims 1 to 9, further comprising a heat transfer suppressing element, wherein the connection part includes a base part which covers the outlet port and the opening is formed on the base part, and the heat transfer suppressing element is disposed on an inner surface of the extension part or an inner surface of the base part.
11. The indoor unit of claim 7, wherein the inlet port is formed along the outer periphery of the panel when viewed from the bottom of the indoor unit.
12. The indoor unit of any one of claims 1 to 11, wherein the extension part, when viewed from a direction where the extension part is extended, includes: an upper portion which is formed in a linear shape at the top of the extension part, a lower portion which is formed in a linear shape at the bottom of the extension part and parallel to the upper portion, a left curved portion which is formed in a curved shape at the left side of the extension part so as to be bent outward, a right curved portion which is formed in a curved shape at the right side of the extension part so as to be bent outward, and line portions which are formed in a linear shape to connect between the upper portion and the left curved portion, between the left curved portion and the lower portion, between the lower portion and the right curved portion, and between the right curved portion and the upper portion.
PCT/IB2019/060106 2019-11-25 2019-11-25 An indoor unit for an air conditioning in a ceiling WO2021105737A1 (en)

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CN201980102095.9A CN114651156A (en) 2019-11-25 2019-11-25 Indoor unit for air conditioner in ceiling

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