JPS6099935A - Ceiling embedded type air conditioner - Google Patents

Abstract

PURPOSE:To shorten defrosting time by a method wherein an auxiliary fan is operated to discharge cool air into only a space at the rear side of a ceiling instead of stopping a fan, upon defrosting operation during room heating. CONSTITUTION:Upon defrosting operation, the fan 8 is stopped, a damper 15 is opened about a hinge 14 and a ventilating path, in which air is flowed by the auxiliary fan 12 from a room 2 to be air-conditioned into the space 3 at the rear side of the ceiling through an air path 7b, heat exchangers 9a, 9b and openings 11a, 11b, is formed. Upon the defrosting operation during room heating, the heat exchangers 9a, 9b become eveporatos and cool air, passes through the heat exchangers 9a, 9b, is discharged into the space 3 at the rear side of the ceiling. Accordingly, the defrosting time is shortened during the defrost operation due to the heat absorption in the heat exchangers 9a, 9b and discharging of cool air into the room 2 to be air-conditioned may be prevented. The ventilating amount of the auxiliary fan 12 is small, therefore, induction of atmosphere into the room 2 to be air-conditioned is reduced and reduction of room temperature may be reduced.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、被空調室の天井内に埋設され、かつ冷房及び
暖房を行なう天井埋込型空気調和機に関する・ 従来例の構成とその問題点 従来から一般的な空気調和機は、暖房時のデフロスト運
転においては送風機が運転されており、蒸発器となる熱
交換器から吐出風路を通して被空調室内に冷風が吐出し
てしまうものであった。このため送風機を停止する技術
もあるが、この場合は被空調室内の空気が蒸発器に送ら
れず、自然対流による吸熱のためデフロスト時間が長く
なるという欠点を有していた。特に天井埋込型空気調和
機では、送風機を停止すると、構造上本体内での自然対
流が少ないために、よりデフロスト時間が長くなる傾向
があった。また本出願人は第１図のように、本体を構成
するキャビネッ）ａに、二次側空間ｂ　、　ｂ／と天井
裏空間Ｃを連通ずる開口ｄ。[Detailed Description of the Invention] Industrial Application Field The present invention relates to a ceiling-embedded air conditioner that is embedded in the ceiling of an air-conditioned room and performs cooling and heating.Conventional structure and problems thereof In general air conditioners, a blower is operated during defrost operation during heating, and cold air is discharged from the heat exchanger serving as the evaporator into the air-conditioned room through the discharge air path. For this reason, there is a technique to stop the blower, but in this case, the air in the air-conditioned room is not sent to the evaporator, and the defrost time is increased due to heat absorption by natural convection. Particularly in ceiling-mounted air conditioners, when the blower is stopped, the defrost time tends to be longer because there is less natural convection within the unit due to its structure. Furthermore, as shown in FIG. 1, the present applicant has provided an opening d in the cabinet (a) constituting the main body, which communicates the secondary space b, b/ with the attic space C.

ｄ′を設け、デフロスト時にはダンパー８　、　ｅ’を
作動させて被空調室内ｆの空気を送風機ｑによって強制
的に熱交換器ｈ　、　ｈ’に送風し、吸熱された冷風を
前記天井裏空間Ｃに排出してデフロスト時間の短縮と冷
風の被空調室内ｆへの吐出防止を行なう方法を提案して
いるが、被空調室内ｆへの外気侵入が多くなシ、室温の
低下も大きくなる欠点を有していた。d' is provided, and during defrosting, the dampers 8 and e' are operated to forcefully blow the air in the air-conditioned room f to the heat exchangers h and h' by the blower q, and the cool air that has absorbed heat is sent to the above-mentioned attic space C. The proposed method shortens the defrosting time and prevents cold air from being discharged into the conditioned room f, but this method has the disadvantage that there is a large amount of outside air entering into the conditioned room f, and the room temperature drops significantly. had.

発明の目的 そこで本発明は上記欠点を解決すべく、デフロスト時間
を短縮し、かつ被空調室内への冷風吐出を防止するとと
もに、被空調室内の室温の低下を小さくすることを目的
とする。OBJECTS OF THE INVENTION Therefore, in order to solve the above-mentioned drawbacks, the present invention aims to shorten the defrost time, prevent cold air from being discharged into the air-conditioned room, and reduce the decrease in the room temperature inside the air-conditioned room.

発明の構成 この目的を達成するため、本発明は天井埋込型空気調和
機の通常の送風機の他に、本体内の熱交換器に対して一
次側空間と天井裏空間とを連通ずる開口を設け、そこに
補助送風機を配置し、暖房時のデフロスト運転時に送風
機は停止する代わりに補助送風機を運転して天井裏空間
のみへ冷気を吐出することにより、デフロスト時間を短
縮、かつ被空調室内への冷風の吐出を防止し、また送風
機での送風量よりも補助送風機での送風量が少なく、従
って被空調室４への外気の侵入量も少なく、室温の低下
も小さくしたものである。Structure of the Invention In order to achieve this object, the present invention provides, in addition to the usual blower of a ceiling-embedded air conditioner, an opening that communicates the primary side space with the attic space for the heat exchanger in the main body. By placing an auxiliary blower there, and instead of stopping the blower during defrost operation during heating, the auxiliary blower operates and discharges cold air only into the attic space, shortening the defrosting time and allowing it to flow into the air-conditioned room. In addition, the amount of air blown by the auxiliary blower is smaller than the amount of air blown by the blower, so the amount of outside air entering into the air-conditioned room 4 is also small, and the drop in room temperature is also reduced.

実施例の説明 以下本発明の一実施例を添付図面に従い説明する。Description of examples An embodiment of the present invention will be described below with reference to the accompanying drawings.

第２図において、１は被空調室２の天井裏空間３内に埋
設される天井埋込型空気調和機本体である。該本体１の
下面は被空調室２に露出し、下面中央に空気吸入口を、
その左右に空気吐出口５ａ。In FIG. 2, reference numeral 1 denotes a ceiling-embedded air conditioner body that is buried in the attic space 3 of the air-conditioned room 2. The lower surface of the main body 1 is exposed to the air-conditioned room 2, and an air intake port is provided at the center of the lower surface.
Air discharge ports 5a are provided on the left and right sides thereof.

６ｂを形成している。本体１内はこの空気吸入口４から
左右の空気吐出口５ａ　、　６ｂに至る各々逆Ｕ字状の
風路６を構成し、吸入口４に而して暖房時のデフロスト
運転時には停止する送風機８を配置している。この送風
機８からの吐出風路は水平部分７ａと垂直部分７ｂより
成り、水平部分子ａに冷房時は蒸発器に、暖房時は凝縮
器となる熱交換器９ａ、９ｂを配置している。１０　ａ
　、　１０　ｂはこの熱交換器９ａ　、９ｂを収納する
露受皿である。6b. Inside the main body 1, an inverted U-shaped air path 6 is formed from the air inlet 4 to the left and right air outlets 5a, 6b, and a blower 8 is connected to the inlet 4 and stops during defrost operation during heating. are placed. The discharge air path from the blower 8 is composed of a horizontal portion 7a and a vertical portion 7b, and heat exchangers 9a and 9b are arranged in the horizontal portion a, which function as an evaporator during cooling and as a condenser during heating. 10a
, 10b is a dew tray that houses the heat exchangers 9a and 9b.

一方上記風路６の水平部分７ａば、空気調和機における
一次側空間となシ、垂直部分７ｂ／ｉ二次側空間となる
。そしてこの−次側空間の本体１天面に天井裏空間３と
連通する開口１１ａ、１１ｂを設け、前記開口１１ａに
は補助送風機１２が配置されている。そして開口１１ａ
は円形であシ、補助送風機１２のプロペラファン１３の
回転に支障をきたさない寸法の直径であり、換言すれば
ファンリングを構成する。また開口１１ｂには蝶番１４
を中心として回転し開口１１ｂを開閉するダンパー１５
が設けられている。つまりこのダンパー１５は通常の冷
暖房運転時には送風機８による風圧のため開口１１ｂは
閉となシ、デフロスト時での送風機８の停止時にはダン
パー１６は自重により落下し、開口１１ｂは開となる。On the other hand, the horizontal portion 7a of the air passage 6 serves as a primary space in the air conditioner, and the vertical portion 7b/i serves as a secondary space. Openings 11a and 11b communicating with the attic space 3 are provided on the top surface of the main body 1 in this next-side space, and an auxiliary blower 12 is disposed in the opening 11a. and opening 11a
is circular and has a diameter that does not interfere with the rotation of the propeller fan 13 of the auxiliary blower 12; in other words, it constitutes a fan ring. Also, the opening 11b has a hinge 14.
A damper 15 rotates around the opening 11b to open and close the opening 11b.
is provided. That is, during normal cooling/heating operation, the opening 11b of the damper 15 is not closed due to the wind pressure from the blower 8, and when the blower 8 is stopped during defrosting, the damper 16 falls due to its own weight and the opening 11b is opened.

なお、ダンパー１６の落下位置（開成位置）は送風機８
の運転再開時には風圧の影響を受ける角変位＃までにな
っており、しかもダンパー１６は補助送風機１２による
吸入圧では開口１１ｂを閉じないように設定されている
。Note that the dropping position (opening position) of the damper 16 is at the blower 8.
When the operation is resumed, the angular displacement has reached #, which is affected by wind pressure, and the damper 16 is set so that the suction pressure from the auxiliary blower 12 does not close the opening 11b.

従って、デフロスト時、送風機８が停止してダンパー１
６が蝶番１４を支点に開き、補助送風機１２により被空
調室２から風路７ｂ、熱交換器９ａ、９ｂ、開口１１ｂ
、１１ａを通って天井裏空間３へ流れる送風路が形成さ
れる。暖房時のデフ０スト運転時、熱交換器９ａ、９ｂ
は蒸発器となるのは周知であり、熱交換器９ａ、９ｂを
通過した冷気は天井裏空間３へ排出される。よってデフ
ロスト運転中、熱交換器９ａ、９ｂでの吸熱ができるた
めデフロスト時間が短縮できると共に、被空調室２内へ
の冷風吐出が防止できる。また補助送風機１２の送風量
は少ないため被空調室２内への外気の侵入も少なくでき
、室温の低下も小さくできる。Therefore, during defrosting, the blower 8 stops and the damper 1
6 opens around the hinge 14, and the auxiliary blower 12 connects the air conditioned room 2 to the air path 7b, the heat exchangers 9a and 9b, and the opening 11b.
, 11a to form an air passage that flows into the attic space 3. Heat exchangers 9a and 9b during differential zero-stroke operation during heating
It is well known that the evaporator serves as an evaporator, and the cool air that has passed through the heat exchangers 9a and 9b is discharged to the attic space 3. Therefore, during the defrosting operation, heat can be absorbed by the heat exchangers 9a and 9b, so that the defrosting time can be shortened and the discharge of cold air into the air-conditioned room 2 can be prevented. Furthermore, since the amount of air blown by the auxiliary blower 12 is small, the intrusion of outside air into the air-conditioned room 2 can be reduced, and the drop in room temperature can also be reduced.

発明の効果 以上の説明からも明らかな如く、本発明によれば、暖房
時のデフロスト中に補助送風機の運転で蒸発器となる熱
交換器を通過した冷気は天井裏借問に排出できるのでデ
フ０スト中に熱交換を促進することができ、デフロスト
時間を短縮できる。Effects of the Invention As is clear from the above explanation, according to the present invention, during defrost during heating, the cold air that has passed through the heat exchanger that serves as an evaporator by operating the auxiliary blower can be discharged into the attic space. It can promote heat exchange during frosting and shorten defrosting time.

またデフロスト時に召する冷気を天井裏空間へ排出する
と共に、被空調室から天井裏空間へ排出する送風量が少
ないため被空調室への外気の侵入を少なくでき、室温の
低下も小さくなるので被空調室での不快感を防止する等
の効果を有するものである。In addition, the cold air used during defrosting is discharged into the attic space, and since the amount of air discharged from the air-conditioned room to the attic space is small, it is possible to reduce the intrusion of outside air into the air-conditioned room, and the drop in room temperature is also reduced. This has the effect of preventing discomfort in an air-conditioned room.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は従来の天井埋込型空気調和機の断面図、第２図
は本発明一実施例の天井埋込型空気調和機の断面図を示
す。 １・・・・・本体、３・・・−・・天井裏空間、７ａ・
・・−・・水平部分（−次側空間）、７ｂ・・・・・・
垂直部分（二次側窒間）、８・・・・・・送風機、９ａ
、９ｂ・・・・・・熱交換鳳１１ａ、１１ｂ・・・・・
・開口、１２・・・・・・補助送風機。 代理人の氏名　弁理士　中　尾　敏　男　ほか１名ｗＩ
１図FIG. 1 is a sectional view of a conventional ceiling-embedded air conditioner, and FIG. 2 is a sectional view of a ceiling-embedded air conditioner according to an embodiment of the present invention. 1...Main body, 3...--Attic space, 7a.
...Horizontal part (-next space), 7b...
Vertical part (secondary side nitrogen), 8...Blower, 9a
, 9b... Heat exchanger 11a, 11b...
・Opening, 12...Auxiliary blower. Name of agent: Patent attorney Toshio Nakao and one other person wI
Figure 1

Claims (1)

【特許請求の範囲】[Claims] 被空調室の天井裏空間内に埋設される本体と一該本体内
に配置し暖房時に凝縮器、冷房時に蒸発器となる一対の
熱交換器と、この一対の熱交換器間の一次側空間に被空
調室内の空気を送風しかつ暖房時のデフロスト運転時停
止する送風機と、前記熱交換器通過後の調和空気を二次
側空間としての吐出風路を介して被空調室に吐出する空
気吐出口と、前記−次側空間と天井裏空間との間に形成
した開口と、この開口に備え前記送風機より送風量が少
なく、かつ暖房時のデフロスト運転時にのみ運転され、
−次側空間の空気を天井裏空間に排出する補助送風機と
よ構成る天井埋込型空気調和機。A main body buried in the attic space of an air-conditioned room, a pair of heat exchangers placed within the main body and serving as a condenser during heating and an evaporator during cooling, and a primary space between the pair of heat exchangers. a blower that blows air in the conditioned room and stops during defrost operation during heating, and air that discharges the conditioned air after passing through the heat exchanger to the conditioned room through a discharge air path serving as a secondary space. an opening formed between the discharge port, the downstream space and the attic space; and an opening provided for the opening, which blows less air than the blower and is operated only during defrost operation during heating;
- A ceiling-mounted air conditioner consisting of an auxiliary blower that discharges air from the next space into the attic space.