JP3818379B2

JP3818379B2 - Recessed floor air conditioner

Info

Publication number: JP3818379B2
Application number: JP2002345941A
Authority: JP
Inventors: 恵一木村; 多門清滝
Original assignee: 木村工機株式会社
Priority date: 2002-11-28
Filing date: 2002-11-28
Publication date: 2006-09-06
Anticipated expiration: 2022-11-28
Also published as: JP2004177050A

Description

【０００１】
【発明の属する技術分野】
本発明は床埋込形エアコンに関する。
【従来の技術】
【０００２】
【特許文献１】
特開２００２−２７６９９３号公報
従来のエアコンは還気を熱交換しながら室内循環して冷暖房するだけの構造のものが多く、上記公報のものでは外気の室内導入と還気の屋外排気はできるが還気を熱交換しながら室内循環して冷暖房することができない。
【０００３】
【発明が解決しようとする課題】
そこで、コンパクトで換気や外気処理から冷暖房等までの全空調が行えると共に居住空間に対する空調エネルギーロスが少ない床輻射空調ができる床埋込形エアコンを提供することを目的とする。
【０００４】
【課題を解決するための手段】
上記目的を達成するために、本発明の床埋込形エアコンは、給気口と還気取入口と外気取入口と排気口を有するケーシング内に、前記還気取入口と前記給気口を連通連結し蒸発器と再熱器と給気ファンを設けた給気送風路と、前記外気取入口と前記排気口を連通連結し凝縮器と排気ファンを設けた排気送風路と、前記還気取入口から取入れた還気を前記凝縮器へも導く第一連通路と、前記外気取入口から取入れた外気を前記蒸発器へも導く第二連通路と、を備え、前記ケーシングを床輻射空調用の床下内に設置し、この床下内に前記給気口を連通させると共に、その床又は室内の床近傍部に、前記給気口からの給気を前記室内に吹出すための吹出口を、設け、前記室内と前記還気取入口を連通させた。さらに、蒸発器と再熱器と凝縮器と圧縮機とを含む冷媒循環回路を、ケーシングに対して引上取出・収納自在に構成した。床の下面に、直接又は蓄熱材を介して、給気が接触する多数の棒状の伝熱体を互いに間をあけて垂下させた。さらに、蒸発器と凝縮器と再熱器の各々のフィンチューブを楕円管にした。
【０００５】
【発明の実施の形態】
図１と図２は、本発明の床埋込形エアコンの一実施例を示しており、このエアコンは、給気口５と還気取入口２と外気取入口４と排気口３を有するケーシング１内に、還気取入口２と給気口５を連通連結し蒸発器６と再熱器７と給気ファン８を設けた伏Ｕ字状の給気送風路Ａと、外気取入口４と排気口３を連通連結し凝縮器９と排気ファン１０を設けた伏Ｕ字状の排気送風路Ｂと、還気取入口２から取入れた還気を凝縮器９へも導く第一連通路Ｃと、外気取入口４から取入れた外気を蒸発器６へも導く第二連通路Ｄと、蒸発器６と再熱器７と凝縮器９と圧縮機１４とを含む冷媒循環回路１３と、を備えている。太い実線矢印と太い点線矢印は風向きを示す。
【０００６】
縦（上下）に薄い扁平箱状のケーシング１の外周側面のうちの対向面の一方に給気口５と還気取入口２を形成するとともにこの対向面の他方に外気取入口４と排気口３を形成する。外気取入口４と還気取入口２は対向させ、この両取入口側の給気送風路Ａ及び排気送風路Ｂの外側に、第一連通路Ｃと第二連通路Ｄを設ける。
【０００７】
ケーシング１は床輻射空調用の床下内の床底スラブなどに設置し、この床下内に給気口５を連通させると共に、その床２３又は室内の床近傍部に、給気口５からの給気を室内に吹出すための吹出口１２と、室内の還気を取入れる吸込口２７と、を設け、この吸込口２７を還気取入口２に連通連結して、室内と還気取入口２を連通させる。吸込口２７と還気取入口２と給気口５と床下はダクトなどを介して通じさせ、排気口３と外気取入口４はダクトやがらり等を介して屋外に通じさせる。床２３の下面には、蓄熱材２５を介して、給気が接触する多数の棒状の伝熱体２４…を互いに間をあけて垂下させ、かつ伝熱体２４…の下端部と床底との間をあけて圧損防止と乱流効果を得る。床下は二重底にし中間の仕切部分（底部分）には断熱材２６を設けて蓄熱効果を高め、この上側の床下内に給気を行って伝熱体２４…と蓄熱材２５に接触させ、床２３に給気熱を伝えて輻射空調しつつ、吹出口１２から吸込口２７へ給気を循環させて室内を空調する。なお、蓄熱材２５を省略して床２３の下面に直接、伝熱体２４を垂下させてもよい。また、伝熱体２４…、断熱材２６を省略するも自由であり、さらに、床下を一重底にして、その床下内へ給気するも自由である。
【０００８】
冷媒循環回路１３は、蒸発器６、凝縮器９、再熱器７、圧縮機１４、図示省略の受液器、膨張弁及び冷媒循環方向の正逆の切換弁等を配管接続して成り、蒸発器６及び凝縮器９の吸熱と放熱を切換自在に構成する。再熱器７は蒸発器６の風下に設け、凝縮器９に流れる冷媒（ホットガス）の一部を再熱器７にバイパスさせて過冷却・除湿・再熱自在に構成する。蒸発器６と凝縮器９と再熱器７の各々のフィンチューブは楕円管にするのが好ましいが円形管でもよい。冷媒循環回路１３は、ケーシング１に対して引上取出・収納自在に構成する。例えば、ケーシング１内に着脱自在に取付けられるフレーム２８に、冷媒循環回路１３を固定して一体化し、ケーシング１の上面に開口部を形成し、この開口部に対して冷媒循環回路フレーム２８を引上取出・収納自在に構成する。この開口部には、着脱又は開閉自在な外装板を設ける。床２３と二重底の中間の仕切部分には冷媒循環回路１３のメンテナンス用ホールを形成し、床２３のメンテナンスホールは、床２３や蓄熱材２５などと同じ部材にて（図１において実線と仮想線で示すごとく）開閉自在なように構成する。
【０００９】
給気送風路Ａと排気送風路Ｂはターン部を向かい合わせて並列に配置し、蒸発器６及び再熱器７と凝縮器９は隣接させ、蒸発器６及び再熱器７の風下に吸込式の給気ファン８を設けるとともに凝縮器９の風下に吸込式の排気ファン１０を設け、凝縮器９の風上に圧縮機１４や受液器などの冷媒循環回路１３の部品を設けて、スペースを有効活用しコンパクト化を図る。この給気送風路Ａと排気送風路ＢはＵ字状にして送風距離を長くしてあるのでコンパクトにもかかわらず低騒音となる。なお、蒸発器６、再熱器７、給気ファン８、凝縮器９、排気ファン１０、圧縮機１４などの配置は図例以外のものとするも自由である。また、加湿器３０を再熱器７の風下に設けるもあるいは省略するも自由である。
【００１０】
ケーシング１には、還気取入口２から蒸発器６への還気風量を制御する給気用還気ダンパ１５と、還気取入口２から凝縮器９への還気風量を制御する排気用還気ダンパ１６と、外気取入口４から蒸発器６への外気風量を制御する給気用外気ダンパ１７と、外気取入口４から凝縮器９への外気風量を制御する排気用外気ダンパ１８と、を設け、各種の運転制御装置等により風量制御を行う。各ダンパ１５、１６、１７、１８は、全閉・全開切換のみ又は任意風量可変自在の何れの構造であってもよい。
【００１１】
このエアコンの運転例を説明すると、換気熱回収冷暖房運転では、全てのダンパ１５、１６、１７、１８を開き、還気取入口２からの還気と外気取入口４からの外気を所定割合で混合して蒸発器６で熱交換し、冷風又は暖風を給気口５から給気し、同時に還気取入口２からの還気と外気取入口４からの外気で凝縮器９の循環冷媒を熱交換して吸熱又は放熱し、排熱回収しつつ排気口３から屋外へ室内空気を所定量排気する。このとき、排気用還気ダンパ１６と給気用外気ダンパ１７を全閉し、還気のみを蒸発器６で熱交換し、外気のみを凝縮器９で熱交換することにより、還気循環冷暖房運転やウォーミングアップ運転を行える。
【００１２】
過冷却・除湿・再熱運転では、給気送風路Ａの空気を蒸発器６で過冷却・除湿した後、再熱器７で再熱していわゆるドライエアーを給気し、同時に排気送風路Ｂの空気で凝縮器９の循環冷媒を熱交換し屋外へ排気する。この場合、再熱のために別個に加熱源が不要でかつ凝縮器負荷が下がり省エネとなる。なお過冷却・除湿する空気は、還気のみ、外気のみ、還気と外気の混合空気、の何れであっても良い。換気運転及び外気冷房運転では、圧縮機１４を止めて給気用還気ダンパ１５と排気用外気ダンパ１８を全閉し、給気用外気ダンパ１７から外気のみを室内へ給気し、排気用還気ダンパ１６から還気のみを屋外へ排気する。このようにして無駄に圧縮動力及び送風動力を使わずに省エネを図る。
【００１３】
【発明の効果】
請求項１の発明では、１台のエアコンで、還気循環冷暖房運転、換気熱回収冷暖房運転、外気冷房運転、換気運転、過冷却・除湿・再熱運転などの各種パターンの運転ができる。給気送風路Ａへの外気取入と排気送風路Ｂへの外気取入を一つの外気取入口４で共用できかつ給気送風路Ａへの還気取入と排気送風路Ｂへの還気取入を一つの還気取入口２で共用できるので、部品点数が減少しコンパクト化とコスト削減を図れ施工が容易となる。給気送風路Ａと排気送風路ＢはＵ字状にして送風距離を長くしてあるのでコンパクトにもかかわらず低騒音となる。床２３からの輻射空調に加えて、居住外空間である室内上層部を除いた床乃至室内中層域までの居住空間のみで空調空気を循環させることにより、同能力の場合は空調面積を広くとれ、空調面積が同じの場合は省エネとなる。空調のみならず床下空間の換気も行える。床下のデッドスペースをエアコンの設置場所として有効活用でき、室内外の美観も損ねない。
請求項２の発明では、ケーシング１全体を取り外すことなく冷媒循環回路１３のみをケーシング１から取出して冷媒回収作業やメンテナンスを容易に行え、取付け収納にも手間がかからない。また、冷媒循環回路１３だけ交換することにより、リニューアル時のコストダウンも図れる。冷媒循環回路１３を引上げて取出すので天吊や壁掛のエアコンと比べて保守時に落下の危険がない。
請求項３の発明では、給気を輻射熱源としているので別個に電気ヒーターや冷温水パイプなどの機器や熱源が不要でランニングコスト及び設備コストを削減できる。伝熱体２４を介して給気と床部分を効率良く熱交換して床輻射空調でき、しかも伝熱体２４は棒状で間をあけてあるので圧損が少なくてすむ。伝熱体２４と床２３の間に蓄熱材２５を介せば、床全域に均等に伝熱し、むらなく床輻射空調が行え、輻射熱量や輻射時間の調整が可能となる。
請求項４の発明では、圧力損失が減少して熱交換効率が向上するので小型のファン８、１０を用いることができ騒音低減を図れる。蒸発器６と凝縮器９と再熱器７も小型化できエアコンをコンパクト化できる。
【図面の簡単な説明】
【図１】本発明の一実施例を示す側面図である。
【図２】図１の平面図である。
【符号の説明】
１ケーシング
２還気取入口
３排気口
４外気取入口
５給気口
６蒸発器
７再熱器
８給気ファン
９凝縮器
１０排気ファン
１２吹出口
１３冷媒循環回路
１４圧縮機
２３床
２４伝熱体
２５蓄熱材
２７吸込口
Ａ給気送風路
Ｂ排気送風路
Ｃ第一連通路
Ｄ第二連通路[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a floor-embedded air conditioner.
[Prior art]
[0002]
[Patent Document 1]
JP, 2002-276993, A Many conventional air conditioners have a structure in which the return air is simply circulated and cooled and heated while exchanging heat. In the above publication, outside air can be introduced indoors and the return air can be exhausted outdoors. It is not possible to circulate indoors while cooling and heating the return air.
[0003]
[Problems to be solved by the invention]
Accordingly, it is an object of the present invention to provide a floor-embedded air conditioner that is compact and can perform all air conditioning from ventilation and outside air treatment to air conditioning and the like, and can perform floor radiation air conditioning with little air conditioning energy loss to the living space.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, a floor-embedded air conditioner according to the present invention includes a return air inlet and an air inlet in a casing having an air inlet, a return air inlet, an outside air inlet and an exhaust port. An air supply air passage having an evaporator, a reheater, and an air supply fan connected in communication, an exhaust air passage having a condenser and an exhaust fan connected in communication with the outside air inlet and the exhaust port, and the return air A first series passage for leading the return air taken in from the intake port to the condenser, and a second communication passage for guiding the outside air taken in from the outside air intake port to the evaporator; The air supply port is installed under the floor for communication, and the air supply port is communicated with the floor. Provided that the room and the return air intake were communicated. Further, a refrigerant circulation circuit including an evaporator, a reheater, a condenser, and a compressor is configured to be able to be pulled out and stored with respect to the casing. A large number of rod-shaped heat transfer members that are in contact with the supply air are suspended on the lower surface of the floor directly or via a heat storage material. Furthermore, the fin tubes of the evaporator, the condenser, and the reheater were made into elliptical tubes.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 and FIG. 2 show an embodiment of a floor-embedded air conditioner according to the present invention. This air conditioner has a supply port 5, a return air intake port 2, an outside air intake port 4, and an exhaust port 3. 1, a return air intake port 2 and an air supply port 5 are connected in communication and an evaporator 6, a reheater 7, and an air supply fan 8 are provided. And a vent U-shaped exhaust air passage B provided with a condenser 9 and an exhaust fan 10 and a first series of passages for leading the return air taken in from the return air inlet 2 to the condenser 9. C, a second communication path D that guides outside air taken in from the outside air inlet 4 to the evaporator 6, a refrigerant circulation circuit 13 that includes the evaporator 6, the reheater 7, the condenser 9, and the compressor 14, It has. A thick solid arrow and a thick dotted arrow indicate the wind direction.
[0006]
An air supply port 5 and a return air intake port 2 are formed on one of the opposed surfaces of the outer peripheral side surface of the flat box-shaped casing 1 which is thin vertically (upper and lower), and an outside air intake port 4 and an exhaust port are formed on the other of the opposed surfaces. 3 is formed. The outside air intake 4 and the return air intake 2 are opposed to each other, and a first series passage C and a second communication passage D are provided outside the supply air supply passage A and the exhaust air supply passage B on both intake sides.
[0007]
The casing 1 is installed on a floor slab or the like under the floor for floor radiation air conditioning. The air supply port 5 is communicated with the floor, and the air supply port 5 is connected to the floor 23 or the vicinity of the floor in the room. An air outlet 12 for blowing air into the room and a suction port 27 for taking in the return air in the room are provided, and the suction port 27 is connected to the return air inlet 2 to connect the room and the return air inlet. 2 communicate. The suction port 27, the return air intake port 2, the air supply port 5, and the floor are communicated with each other through a duct, and the exhaust port 3 and the outside air intake port 4 are communicated with each other outdoors through a duct, a gargle, and the like. On the lower surface of the floor 23, a large number of rod-shaped heat transfer bodies 24 that are in contact with the supply air are suspended via a heat storage material 25 while being spaced apart from each other, and the lower ends of the heat transfer bodies 24. A pressure gap is prevented and a turbulent flow effect is obtained. The floor is double-bottomed, and a heat insulating material 26 is provided in the middle partition (bottom) to enhance the heat storage effect, and air is supplied into the upper floor below to contact the heat transfer body 24 and the heat storage material 25. The air supply is circulated from the air outlet 12 to the air inlet 27 to transmit air supply heat to the floor 23 and radiate air conditioning, thereby air-conditioning the room. In addition, the heat storage material 25 may be omitted and the heat transfer body 24 may be suspended directly on the lower surface of the floor 23. Further, it is possible to omit the heat transfer bodies 24... And the heat insulating material 26, and it is also free to supply air into the floor under a single floor.
[0008]
The refrigerant circulation circuit 13 is formed by connecting an evaporator 6, a condenser 9, a reheater 7, a compressor 14, a liquid receiver (not shown), an expansion valve, a forward / reverse switching valve in the refrigerant circulation direction, and the like. The heat absorption and heat dissipation of the evaporator 6 and the condenser 9 are configured to be switchable. The reheater 7 is provided leeward of the evaporator 6, and a part of the refrigerant (hot gas) flowing through the condenser 9 is bypassed to the reheater 7 so as to be freely cooled, dehumidified, and reheated. The fin tubes of the evaporator 6, the condenser 9, and the reheater 7 are preferably elliptical tubes, but may be circular tubes. The refrigerant circulation circuit 13 is configured to be able to be taken out and stored with respect to the casing 1. For example, the refrigerant circulation circuit 13 is fixed and integrated with a frame 28 that is detachably mounted in the casing 1, an opening is formed on the upper surface of the casing 1, and the refrigerant circulation circuit frame 28 is pulled through the opening. It is configured so that it can be taken out and stored. This opening is provided with an exterior plate that can be attached or detached. A maintenance hole for the refrigerant circulation circuit 13 is formed in a partition part between the floor 23 and the double bottom, and the maintenance hole for the floor 23 is formed of the same member as the floor 23 and the heat storage material 25 (in FIG. It is configured so that it can be opened and closed (as indicated by a virtual line).
[0009]
The supply air passage A and the exhaust air passage B are arranged in parallel with the turn portions facing each other, the evaporator 6, the reheater 7 and the condenser 9 are adjacent to each other, and sucked into the lee of the evaporator 6 and the reheater 7. A suction-type exhaust fan 10 is provided on the lee of the condenser 9, and components of the refrigerant circuit 13 such as a compressor 14 and a liquid receiver are provided on the wind of the condenser 9. Use space effectively to make it more compact. The air supply air passage A and the exhaust air passage B are U-shaped and have a long air supply distance. In addition, arrangement | positioning of the evaporator 6, the reheater 7, the air supply fan 8, the condenser 9, the exhaust fan 10, the compressor 14, etc. can also be made into things other than the example of a figure. Further, the humidifier 30 may be provided on the lee of the reheater 7 or may be omitted.
[0010]
The casing 1 includes a supply air return damper 15 that controls the amount of return air from the return air inlet 2 to the evaporator 6, and an exhaust gas that controls the amount of return air from the return air inlet 2 to the condenser 9. A return air damper 16, an air supply damper 17 for controlling the amount of outside air from the outside air inlet 4 to the evaporator 6, and an outside air damper 18 for controlling the amount of outside air from the outside air inlet 4 to the condenser 9. The air volume is controlled by various operation control devices. Each of the dampers 15, 16, 17, and 18 may have any structure in which only the full-close / full-open switching is performed or the arbitrary air volume can be varied.
[0011]
Explaining the operation example of this air conditioner, in the ventilation heat recovery air conditioning operation, all the dampers 15, 16, 17, 18 are opened, and the return air from the return air intake 2 and the outside air from the outside air intake 4 at a predetermined ratio. After mixing and exchanging heat with the evaporator 6, cold air or warm air is supplied from the air supply port 5, and at the same time, the return refrigerant from the return air intake 2 and the outside air from the outside air intake 4 are circulating refrigerant in the condenser 9. Heat is exchanged to absorb or dissipate heat, and exhaust air is exhausted to exhaust the indoor air from the exhaust port 3 to the outside. At this time, the exhaust return air damper 16 and the supply outside air damper 17 are fully closed, only the return air is heat-exchanged by the evaporator 6, and only the outside air is heat-exchanged by the condenser 9. Driving and warming up can be performed.
[0012]
In the supercooling / dehumidification / reheat operation, the air in the supply air passage A is supercooled / dehumidified by the evaporator 6 and then reheated by the reheater 7 to supply so-called dry air, and at the same time the exhaust air passage B The refrigerant in the condenser 9 is heat-exchanged with the air and exhausted outdoors. In this case, a separate heating source is not required for reheating, and the condenser load is reduced to save energy. The air to be supercooled / dehumidified may be only return air, only outside air, or mixed air of return air and outside air. In the ventilation operation and the outside air cooling operation, the compressor 14 is stopped, the supply return air damper 15 and the exhaust outside air damper 18 are fully closed, and only the outside air is supplied from the supply outside air damper 17 into the room for exhaust. Only the return air is exhausted from the return air damper 16 to the outside. In this way, energy is saved without wastefully using compression power and blowing power.
[0013]
【The invention's effect】
According to the first aspect of the invention, various patterns of operation such as return air circulation cooling / heating operation, ventilation heat recovery cooling / heating operation, outside air cooling operation, ventilation operation, supercooling / dehumidification / reheating operation can be performed with one air conditioner. The outside air intake to the air supply air passage A and the outside air intake to the exhaust air air passage B can be shared by one outside air inlet 4, and the return air intake to the air supply air passage A and the return to the exhaust air passage B Since the air intake can be shared by one return air intake 2, the number of parts is reduced, and the construction can be facilitated by reducing the size and cost. The supply air passage A and the exhaust air passage B are U-shaped to increase the air blowing distance, so that the noise is low despite being compact. In addition to radiation air-conditioning from the floor 23, air-conditioning air is circulated only in the living space from the floor to the indoor middle layer except the indoor upper layer, which is the space outside the living room. If the air-conditioning area is the same, it will save energy. In addition to air conditioning, it can ventilate the space under the floor. The dead space under the floor can be used effectively as the location of the air conditioner, and the aesthetics of the interior and exterior are not impaired.
According to the second aspect of the present invention, only the refrigerant circulation circuit 13 can be taken out from the casing 1 without removing the casing 1 as a whole, and the refrigerant recovery operation and maintenance can be easily performed. Further, by replacing only the refrigerant circulation circuit 13, it is possible to reduce the cost at the time of renewal. Since the refrigerant circulation circuit 13 is pulled up and taken out, there is no danger of falling during maintenance compared to a ceiling-mounted or wall-mounted air conditioner.
In the invention of claim 3, since the supply air is used as a radiant heat source, there is no need for a separate device or heat source such as an electric heater or a cold / hot water pipe, and the running cost and equipment cost can be reduced. Heat exchange between the air supply and the floor portion can be efficiently performed through the heat transfer body 24 to perform floor radiant air conditioning. Moreover, since the heat transfer body 24 is formed in a bar shape, pressure loss is reduced. If the heat storage material 25 is interposed between the heat transfer body 24 and the floor 23, heat is evenly transferred to the entire floor, floor radiation air conditioning can be performed uniformly, and the amount of radiant heat and radiation time can be adjusted.
In the invention of claim 4, since the pressure loss is reduced and the heat exchange efficiency is improved, the small fans 8 and 10 can be used, and noise can be reduced. The evaporator 6, the condenser 9, and the reheater 7 can also be miniaturized, and the air conditioner can be made compact.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of the present invention.
2 is a plan view of FIG. 1. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Casing 2 Return air inlet 3 Exhaust port 4 Outside air inlet 5 Air supply port 6 Evaporator 7 Reheater 8 Supply fan 9 Condenser 10 Exhaust fan 12 Outlet 13 Refrigerant circulation circuit 14 Compressor 23 Floor 24 Heat transfer Body 25 Heat storage material 27 Suction port A Supply air passage B Exhaust air passage C First series passage D Second communication passage

Claims

An air supply port 5 and a return air intake port 2 are formed on one of the opposed surfaces of the outer peripheral side surface of the casing 1, and an outside air intake port 4 and an exhaust port 3 are formed on the other of the opposed surfaces. The return air intake port 2 and the air supply port 5 are connected in communication, and an evaporator 6, a reheater 7, and an air supply fan 8 are provided, and the outside air intake port 4. And a concave U-shaped exhaust air passage B provided with a condenser 9 and an exhaust fan 10 in communication with each other, and the outside air inlet 4 and the return air inlet 2 are opposed to each other. A first series passage C for guiding the return air taken in from the return air intake 2 to the condenser 9 outside the supply air supply passage A and the exhaust air supply passage B on both intake sides, and the outside air intake a second communication passage D also lead the outside air taken from the inlet 4 to the evaporator 6, the provided, the casing 1 through the floor for floor radiant air-conditioning The air inlet 5 is installed and communicated with the air outlet 5 under the floor, and the air outlet 12 for blowing the air supplied from the air inlet 5 into the room on the floor 23 or in the vicinity of the floor in the room, A floor-embedded air conditioner characterized in that the room and the return air intake 2 are communicated with each other.

The floor-embedded air conditioner according to claim 1, wherein the refrigerant circulation circuit (13) including the evaporator (6), the reheater (7), the condenser (9), and the compressor (14) is configured to be able to be pulled out and stored with respect to the casing (1).

3. A floor-embedded air conditioner according to claim 1 or 2, wherein a large number of rod-shaped heat transfer bodies 24, which are in contact with the supply air, are suspended from the lower surface of the floor 23 directly or via a heat storage material 25 with a gap therebetween. .

The floor-embedded air conditioner according to claim 1, 2, or 3, wherein the fin tubes of the evaporator 6, the condenser 9 and the reheater 7 are elliptical tubes.