JPH03195853A - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JPH03195853A JPH03195853A JP1337221A JP33722189A JPH03195853A JP H03195853 A JPH03195853 A JP H03195853A JP 1337221 A JP1337221 A JP 1337221A JP 33722189 A JP33722189 A JP 33722189A JP H03195853 A JPH03195853 A JP H03195853A
- Authority
- JP
- Japan
- Prior art keywords
- air
- compressor
- temperature
- duct
- room temperature
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- 238000001816 cooling Methods 0.000 claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 238000004378 air conditioning Methods 0.000 claims abstract description 9
- 230000001143 conditioned effect Effects 0.000 claims abstract description 9
- 238000009423 ventilation Methods 0.000 claims description 8
- 230000007423 decrease Effects 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000007664 blowing Methods 0.000 abstract description 6
- 230000003247 decreasing effect Effects 0.000 abstract description 6
- 238000013021 overheating Methods 0.000 abstract description 2
- 238000005273 aeration Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 2
- 239000000470 constituent Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Air Conditioning Control Device (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、吹出温度を一定に保つ能力制御を行う空気調
和機に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an air conditioner that controls the ability to maintain a constant blowout temperature.
従来の技術
従来の吹出温度一定制御を行う空気調和機の一実施例に
ついて図面を参照に説明する。2. Description of the Related Art An embodiment of a conventional air conditioner that performs constant control of outlet temperature will be described with reference to the drawings.
第午図は従来の空気調和機を示す構成概略図で、１はダ
クト式の室内機本体で、内部に室内側熱交換器２．室内
側送風機３．前記室内側送風機３にて吹き出された空気
温度を検出する吹出温度検出ａ４を有している。５は室
外機本体で、内部に能力可変式の圧縮機６．室外側熱交
換器７．室外側送風機８．前記圧縮機６の能力を制御す
る圧縮機ｍｑ御装置９を有している。Figure 1 is a schematic configuration diagram showing a conventional air conditioner, in which 1 is a duct type indoor unit body, and there is an indoor heat exchanger 2 inside. Indoor blower 3. It has a blowout temperature detection a4 for detecting the temperature of the air blown out by the indoor blower 3. 5 is the outdoor unit main body, and there is a variable capacity compressor 6. Outdoor heat exchanger7. Outdoor blower 8. It has a compressor mq control device 9 that controls the capacity of the compressor 6.
前記室内機本体１から被空調室１０までダクト１１にて
接続され、被空調室１０に温風又は冷風を導く。前記ダ
クト１１の途中には可変風量ユニット１２が具備され通
過風量を変化させることで、前記被空調室１０の室温制
御を行っている。A duct 11 connects the indoor unit main body 1 to the air-conditioned room 10, and guides hot air or cold air to the air-conditioned room 10. A variable air volume unit 12 is provided in the middle of the duct 11 to control the room temperature of the air-conditioned room 10 by changing the amount of air passing through it.
１３はリターンダクトで、前記被空調室ｌＯから室内機
本体１に空気を導く。１４は吸気ダクト、１５は排気ダ
クトで、給気ダクト１４．排気ダクト１５いずれもダク
トの途中に給・排気装置としてのファン１４°、１５゛
をもち、前記リターンダクト１３内の空気の一部を排気
するとともに、外気を給気して、被空調室１０を換気し
ている。Reference numeral 13 denotes a return duct that guides air from the air-conditioned room IO to the indoor unit main body 1. 14 is an intake duct, 15 is an exhaust duct, and the supply air duct 14. Each of the exhaust ducts 15 has fans 14° and 15° as supply/exhaust devices in the middle of the duct to exhaust a part of the air in the return duct 13 and supply outside air to the air-conditioned room 10. is ventilated.
１６は前記可変風量ユニット１２の風量１１ａｌｌ装置
で、被空調室１０内の室温調整器１７に設けられた室温
設定器１８にて設定された設定室温Ｔ。Reference numeral 16 denotes an air volume 11all device of the variable air volume unit 12, and a set room temperature T set by a room temperature setting device 18 provided in the room temperature regulator 17 in the air-conditioned room 10.
と室温検出器１９にて検出された室温Ｔ、との差でもっ
て、前記可変風量ユニット１２内のダンパー１２ａ（図
示せず）、モータ１２ｂ（図示せず）を制御しダクト１
１内の通過風量を制御する。Based on the difference between the temperature T detected by the room temperature detector 19, the damper 12a (not shown) and the motor 12b (not shown) in the variable air volume unit 12 are controlled.
Controls the amount of air passing through 1.
次にその動作について説明する。Next, its operation will be explained.
前記室温調整器１７内の室温設定器１８にて設定された
設定室温Ｔ。と室温検出器１９にて検出された室温Ｔ、
の差が、冷暖時Ｔ、−Ｔ。〉０の場合ダクト１１内の風
量が増加する様態量制御装置１６は可変風量ユニットを
制御する。また逆にＴ、−Ｔｏ＜Ｏの場合ダクト１１内
の風量を減少させるよう制御する。このとき被空調室１
０換気風量の確保の為、可変風量ユニットは、最低でも
ダクト１１内の通過風量をあらかじめ設定した風量以下
にはならない。このようにダクト１１内の通過風量が変
化するが、前記室内機本体１内の吹出温度検出器４にて
検出された吹出温度が常に一定になるよう前記圧縮機制
御装置９は圧縮機６の能力を可変する。A set room temperature T set by the room temperature setting device 18 in the room temperature regulator 17. and the room temperature T detected by the room temperature detector 19,
The difference between T and -T during cooling and heating. >0, the amount of air in the duct 11 increases.The amount control device 16 controls the variable air amount unit. Conversely, when T, -To<O, the air volume inside the duct 11 is controlled to be reduced. At this time, air conditioned room 1
In order to ensure zero ventilation airflow, the variable airflow unit does not allow the airflow passing through the duct 11 to fall below a preset airflow at the very least. Although the amount of air passing through the duct 11 changes in this way, the compressor control device 9 controls the compressor 6 so that the blowout temperature detected by the blowout temperature detector 4 in the indoor unit main body 1 is always constant. Change ability.
以上のように室内機本体１から常に一定の吹出温度にて
空気を吹出し、可変風量ユニット１２にて被空調室１０
内に供給する風量を変化させて被空調室１０を空調する
ものである。As described above, air is always blown out from the indoor unit main body 1 at a constant blowing temperature, and the variable air volume unit 12 is used to blow air into the air-conditioned room 10.
The air-conditioned room 10 is air-conditioned by changing the amount of air supplied into the air-conditioned room 10.
発明が解決しようとする課題
しかしながら上述した構成では、被空調室の空調負荷が
減少しても、換気風量を確保する為一定風量以下には供
給風量を減少させることができず、冷房時被空調室が冷
え過ぎ、暖房時には逆に暖まり過ぎる、つまり空気調和
機の能力が下がらないという課題を有していた。Problems to be Solved by the Invention However, with the above-mentioned configuration, even if the air conditioning load on the air-conditioned room decreases, the supplied air volume cannot be reduced below a certain air volume in order to ensure the ventilation air volume, and the air-conditioning load during cooling cannot be reduced. The problem was that the room became too cold, and when heated, it became too warm, meaning that the air conditioner's performance did not decrease.
本発明は上記課題に鑑み、被空調室の空調負荷が減少し
たとき、被空調室を冷房時冷えすぎたり、暖房時暖まり
すぎにさせず快適な屋内環境を維持する空気調和機を提
供するものである。In view of the above-mentioned problems, the present invention provides an air conditioner that maintains a comfortable indoor environment without causing the conditioned room to become too cold during cooling or too warm during heating when the air conditioning load on the conditioned room is reduced. It is.
課題を解決するための手段
そこで本発明の空気調和機では、従来に加えて、圧縮機
の能力があらかじめ設定した能力以下に低下した場合、
吹出温度の設定温度を冷房運転時所定値上げ、暖房運転
時所定値下げるよう圧縮機制御装置に制御させるもので
ある。Means for Solving the Problems Therefore, in addition to the conventional air conditioner, when the capacity of the compressor decreases below a preset capacity, in the air conditioner of the present invention,
The compressor control device controls the set temperature of the blowout temperature to be increased by a predetermined value during cooling operation and decreased by a predetermined value during heating operation.
作 用
以上の構成により、被空調室の空調負荷が減少し、圧縮
機の能力があらかじめ設定した能力以下に低下した場合
、冷房運転時吹出温度が所定値上り（暖房運転時運に所
定値下がる）、換気風量を確保しながら空気調和機の能
力を低下させることができ、被空調室の冷房運転時の冷
え過ぎや暖房運転時の暖まり過ぎを防止し、快適な室内
環境を維持させることができる。Effect With the above configuration, when the air conditioning load of the air-conditioned room decreases and the compressor capacity drops below the preset capacity, the blowout temperature increases by a predetermined value during cooling operation (decreases by a predetermined value during heating operation). , it is possible to reduce the capacity of the air conditioner while ensuring ventilation air volume, preventing the air-conditioned room from becoming too cold during cooling operation or overheating during heating operation, and maintaining a comfortable indoor environment. .
実施例
本発明の一実施例を図面を参照に説明する。従来例と構
成要因は同じなので同一番号を付与し詳細な説明は省略
する。Embodiment An embodiment of the present invention will be described with reference to the drawings. Since the constituent factors are the same as those of the conventional example, the same numbers will be assigned and detailed explanation will be omitted.
第１図は本実施例の構成概要図で、１はダクト式の室内
機本体で内部に室内側熱交換器２．室内側送風器３．吹
出温度検出器４を具備している。FIG. 1 is a schematic diagram of the configuration of this embodiment, in which 1 is a duct type indoor unit body with an indoor heat exchanger 2. Indoor blower 3. A blowout temperature detector 4 is provided.
５は室外機本体で、内部に能力可変式の圧縮機６、室外
側熱交換器７．室外送風機８．圧縮機制御装置９を具備
している。被空調室１０と前記室内機本体１は、ダクト
１１にて接続され、前記ダクト１１の途中に可変風量１
２が具備されている。１３はリターンダクトで途中に給
気ダクト１４゜排気ダクト１５が接続されている。１４
″、１５′は給排気装置としての前記給気ダクト１４．
排気ダクト１５用のファンである。１６は、前記可変風
量ユニット１２用の風量制御装置、１７は被空調室１０
内に設けられた室温調整器で、内部に室温設定器１８．
室温検出器１９を有している。Reference numeral 5 denotes the outdoor unit body, which includes a variable capacity compressor 6 and an outdoor heat exchanger 7. Outdoor blower8. A compressor control device 9 is provided. The air-conditioned room 10 and the indoor unit main body 1 are connected through a duct 11, and a variable air volume 1 is installed in the middle of the duct 11.
2 is provided. 13 is a return duct to which an air supply duct 14 and an exhaust duct 15 are connected. 14
'', 15' are the air supply ducts 14.
This is a fan for the exhaust duct 15. 16 is an air volume control device for the variable air volume unit 12; 17 is an air conditioned room 10;
A room temperature controller installed inside the room temperature setting device 18.
It has a room temperature detector 19.
次にその動作について第２図のブロック図にて説明する
。２０は、本空気調和機を制御するＣＰＵ（図示せず）
で、内部に前記室温設定器１８により設定された設定室
温Ｔ。と前記室温検出器１９にて検出された室温Ｔ、と
を比較する室温比較器２１と、吹出温度を設定する吹出
温度設定器２２と、前記吹出温度検出器４にて検出され
た吹出温度［１と吹出温度設定器２２にて設定された設
定吹出温度ｔ。とを比較する吹出温度比較器２３と、圧
縮機６の所定能力を記憶する記憶器２４と、前記記憶器
２４にて記憶した所定能力Ｑ。と圧縮機４の能力Ｑ１と
を比較する能力比較器２５を内蔵している。前記ＣＰＵ
２０は、前記室温比較器２１の比較結果により前記可変
風量ユニット１２の風量を可変させるとともに、前記吹
出温度比較器２３の比較結果により圧縮機４の能力Ｑ、
を変化させる。また前記能力比較器２５の比較結果によ
り前記吹出温度設定器２２の設定温度を変化させる。Next, its operation will be explained with reference to the block diagram in FIG. 20 is a CPU (not shown) that controls this air conditioner.
Then, there is a set room temperature T set by the room temperature setting device 18 inside. and the room temperature T detected by the room temperature detector 19; a room temperature comparator 21 that compares the room temperature T detected by the room temperature detector 19; 1 and the set blowout temperature t set by the blowout temperature setting device 22. a blowout temperature comparator 23 for comparing the values of the compressor 6, a memory 24 for storing a predetermined capacity of the compressor 6, and a predetermined capacity Q stored in the memory 24. A capacity comparator 25 is built in to compare the capacity Q1 of the compressor 4 with the capacity Q1 of the compressor 4. Said CPU
20 varies the air volume of the variable air volume unit 12 based on the comparison result of the room temperature comparator 21, and changes the capacity Q of the compressor 4 based on the comparison result of the blowout temperature comparator 23;
change. Further, the set temperature of the blowout temperature setting device 22 is changed based on the comparison result of the capacity comparator 25.
次にこの動作の具体例を第３図のフローチャートで説明
する。Next, a specific example of this operation will be explained with reference to the flowchart of FIG.
前記室温調整器１７内の室温設定器１８にて設定された
設定室温Ｔ。と室温検出器１９にて検出された室温Ｔの
差が、冷房時Ｔ、−Ｔ０＞０の場言
合ダクト１１内の風量が増加する採風量制御装置１６は
可変風量ユニットを制御する（ステップ１）。また逆に
Ｔ、−Ｔｏ＜Ｏの場合ダクト１１内の風量を減少させる
よう制御する（ステップ１）。A set room temperature T set by the room temperature setting device 18 in the room temperature regulator 17. If the difference between T and the room temperature T detected by the room temperature detector 19 during cooling is T, -T0>0, the air volume in the duct 11 increases.The air intake volume control device 16 controls the variable air volume unit (step 1). Conversely, if T, -To<O, the air volume inside the duct 11 is controlled to be reduced (step 1).
このとき被空調室１０の換気風量の確保の為、可変風量
ユニット１２は、最低でもダクト１１内の通過風量をあ
らかじめ設定した風量以下にはならない。このようにダ
クト１１内の通過風量が変化するが、前記室内機本体１
内の吹出温度検出器４にて検出された吹出温度が一定温
度し。になる様前記圧縮機制御装置９は圧縮機６の能力
を制御する（ステップ２）。At this time, in order to ensure the ventilation air volume of the air-conditioned room 10, the variable air volume unit 12 does not allow the air volume passing through the duct 11 to fall below a preset air volume. Although the amount of air passing through the duct 11 changes in this way, the indoor unit main body 1
The blowout temperature detected by the blowout temperature detector 4 in the inside is a constant temperature. The compressor control device 9 controls the capacity of the compressor 6 so as to achieve the following (step 2).
このとき圧縮機能力が所定能力以下になった場合、前記
一定吹出設定温度ｔ０を冷房時所定値上げ、暖房時所定
値下げる（ステップ３）。具体的に説明すると、冷房運
転時一定吹出段定温度り。At this time, if the compression function power is below a predetermined capacity, the constant blowout set temperature t0 is increased by a predetermined value during cooling and decreased by a predetermined value during heating (step 3). To be more specific, during cooling operation, there is a constant temperature at a constant blowout stage.
を１５℃とすると、前記圧縮機能力が５０％以下になっ
た場合、一定吹出設定温度を１８℃に変化させる。この
とき、前記被空調室１０への最大供給風量が５０ｊ／ｗ
ｉｎ、最小供給風量（換気必要風量）が２０ｊ／ｍｉｎ
とすると、一定吹出湯度が１５℃のままであると、能力
は約４０％までしか減小させることができず、前述した
課題である被空調室１０の冷房負荷が４０％以下になっ
た場合、室内の冷え過ぎが発生する。本実施例のように
圧縮機の能力が５０％以下になった場合、一定吹出温度
を１８℃に変化させると、室内機１の吸込み温度が仮に
２６℃とすると、２０ （２６−１８）１５０ （２６
−１５＞＝２９より約２９％まで制御することが、最小
風量２０ｗｔ／ｗｉｎを確保しながら行うことができる
。is set to 15°C, and when the compression function becomes 50% or less, the constant blowing set temperature is changed to 18°C. At this time, the maximum amount of air supplied to the air-conditioned room 10 is 50j/w.
in, minimum supply air volume (ventilation required air volume) is 20J/min
Assuming this, if the constant hot water temperature remains at 15°C, the capacity can only be reduced to about 40%, and the cooling load of the air-conditioned room 10, which is the problem mentioned above, has fallen below 40%. In this case, the room becomes too cold. When the capacity of the compressor becomes 50% or less as in this example, if the constant blowout temperature is changed to 18°C, if the suction temperature of the indoor unit 1 is 26°C, then 20 (26-18) 150 (26
Since -15>=29, control to about 29% can be performed while ensuring a minimum air volume of 20 wt/win.
また暖房の場合も、冷房の場合と同様に、暖房の能力！
１３御範囲を、最小風量を確保しながら拡げることがで
きる。Also, in the case of heating, just like in the case of cooling, the heating capacity!
13 range can be expanded while ensuring the minimum air volume.
以上のように、一定吹出温度制御において、圧縮機の能
力が所定値以下になった時、一定吹出設定温度を冷房時
、所定値上げ、暖房時、所定値下げることにより、最低
換気風量を確保しながら、能力ｍｑ御範囲を拡げること
ができ、被空調室の空調負荷が減少した場合の室内の冷
え過ぎ、暖まり過ぎを防止できる。As described above, in constant outlet temperature control, when the capacity of the compressor falls below a predetermined value, the minimum ventilation air volume is ensured by increasing the set outlet temperature by a predetermined value during cooling and decreasing it by a predetermined value during heating. However, the capacity mq control range can be expanded, and the room can be prevented from becoming too cold or too warm when the air conditioning load on the air-conditioned room is reduced.
発明の効果
以上のように本発明によると一定吹出温度制御を行う空
気調和機において、圧縮機の能力が所定値以下になった
時、一定吹出設定温度を冷房時所定値上げ、暖房時所定
値下げることにより、被空調室の空調負荷が低負荷時に
おいても換気風量を確保しながら十分能力制御が行うこ
とができ、被空調室の冷房時の冷え過ぎや、暖房時の暖
まり過ぎを防止することができ、快適な室内環境を維持
することができるという効果がある。Effects of the Invention As described above, according to the present invention, in an air conditioner that performs constant blowout temperature control, when the capacity of the compressor falls below a predetermined value, the constant blowout temperature is increased by a predetermined value during cooling and decreased by a predetermined value during heating. As a result, even when the air conditioning load of the conditioned room is low, sufficient capacity control can be performed while ensuring ventilation air volume, and it is possible to prevent the conditioned room from getting too cold when cooling or getting too warm when heating. This has the effect of making it possible to maintain a comfortable indoor environment.
第１図は本発明の一実施例の空気調和機の構成概念図、
第２図は本実施例の動作のブロック図、第３図は本実施
例の動作フローチャート、第４図は従来の空気調和機の
構成概念図、第５図は従来の動作フローチャートである
。
１・・・・・・室内機本体、２・・・・・・室内側熱交
換器、３・・・・・・室内側送風器、４・・・・・・吹
出温度検出器、５・・・・・・室外機本体、６・・・・
・・圧縮機、７・・・・・・室外側熱交換器、８・・・
・・・室外側送風機、９・・・・・・圧縮機制御装置、
１０・・・・・・被空調室、１１・・・・・・ダクト、
１２・・・・・・可変風量ユニット、１４°、１５°・
・・・・・ファン（給排気袋ｆｉｌ）。FIG. 1 is a conceptual diagram of the configuration of an air conditioner according to an embodiment of the present invention.
FIG. 2 is a block diagram of the operation of this embodiment, FIG. 3 is an operation flowchart of this embodiment, FIG. 4 is a conceptual diagram of the configuration of a conventional air conditioner, and FIG. 5 is a conventional operation flowchart. 1...Indoor unit main body, 2...Indoor heat exchanger, 3...Indoor blower, 4...Blowout temperature detector, 5... ...Outdoor unit body, 6...
...Compressor, 7...Outdoor heat exchanger, 8...
... Outdoor blower, 9... Compressor control device,
10... Air-conditioned room, 11... Duct,
12...Variable air volume unit, 14°, 15°・
...Fan (supply/exhaust bag fil).
Claims (1)
を検出する吹出温度検出器とを有するダクト式の室内機
本体と、能力可変式の圧縮機と、室外側熱交換器と、室
外側送風機と、前記圧縮機の運転を制御する圧縮機制御
装置とを有する室外機本体と、前記室内機本体から被空
調室へ冷風または温風を導くダクトと、前記ダクト内に
、被空調室の空調負荷によりダクト内の通過風量を制御
する可変風量ユニットと、前記被空調室の換気を行う給
・排気装置とを具備し、前記可変風量ユニットは、被空
調室の空調負荷によらず最少通過風量（換気風量）を確
保し、かつ前記圧縮機制御装置は、前記吹出温度検出器
にて検出した吹き出し空気温度を、あらかじめ設定され
た設定温度になるよう、前記能力可変式の圧縮機の能力
制御を行うとともに、前記能力可変式の圧縮機能力が所
定能力以下に低下した場合、前記吹き出し空気温度の設
定温度を、冷房運転時所定値上げ、暖房運転時所定値下
げることを特徴とした空気調和機。A duct type indoor unit body having an indoor heat exchanger, an indoor blower, an outlet temperature detector that detects the outlet air temperature, a variable capacity compressor, an outdoor heat exchanger, and an outdoor unit. an outdoor unit main body having an air blower and a compressor control device that controls the operation of the compressor; a duct that guides cold air or warm air from the indoor unit main body to the air-conditioned room; The variable air volume unit is equipped with a variable air volume unit that controls the amount of air passing through the duct according to the air conditioning load, and a supply/exhaust device that ventilates the air conditioned room, and the variable air volume unit is configured to control the amount of air passing through the duct regardless of the air conditioning load of the air conditioned room. The compressor control device controls the capacity of the variable capacity compressor so that the airflow rate (ventilation airflow rate) is ensured, and the blowout air temperature detected by the blowout temperature detector becomes a preset temperature. The air conditioner is characterized in that when the compression function of the variable capacity type decreases below a predetermined capacity, the set temperature of the blown air temperature is increased by a predetermined value during cooling operation and lowered by a predetermined value during heating operation. Machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1337221A JPH07109312B2 (en) | 1989-12-26 | 1989-12-26 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1337221A JPH07109312B2 (en) | 1989-12-26 | 1989-12-26 | Air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03195853A true JPH03195853A (en) | 1991-08-27 |
| JPH07109312B2 JPH07109312B2 (en) | 1995-11-22 |
Family
ID=18306584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1337221A Expired - Lifetime JPH07109312B2 (en) | 1989-12-26 | 1989-12-26 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07109312B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0587382A (en) * | 1991-09-30 | 1993-04-06 | Kubota Corp | Atmospheric air introduction type air conditioner |
-
1989
- 1989-12-26 JP JP1337221A patent/JPH07109312B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0587382A (en) * | 1991-09-30 | 1993-04-06 | Kubota Corp | Atmospheric air introduction type air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07109312B2 (en) | 1995-11-22 |
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