JPS63153373A - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JPS63153373A JPS63153373A JP30098386A JP30098386A JPS63153373A JP S63153373 A JPS63153373 A JP S63153373A JP 30098386 A JP30098386 A JP 30098386A JP 30098386 A JP30098386 A JP 30098386A JP S63153373 A JPS63153373 A JP S63153373A
- Authority
- JP
- Japan
- Prior art keywords
- indoor
- valve
- outdoor
- heat exchanger
- indoor units
- 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
- 238000010257 thawing Methods 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 9
- 230000003247 decreasing effect Effects 0.000 claims 1
- 239000003507 refrigerant Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
- Air Conditioning Control Device (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、複数の室内機を有するヒートポンプ式の空気
調和機の特に暖房運転時の除霜運転に関するものである
。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a defrosting operation of a heat pump type air conditioner having a plurality of indoor units, particularly during heating operation.
従来の技術
従来の複数の室内機を有するヒートポンプ式の空気調和
機は、第３図に示す様に、室外機１内に設置された、圧
縮機２、四方弁３、室外側熱交換器４、室外側膨張弁６
より、室内機６内に設置された室内側膨張弁７及び室内
側熱交換器８を並列接続した上、環状に順次接続し、ヒ
ートポンプ式冷凍サイクルを構成している。又圧縮機２
の吐出管２ａと吸入管２ｂの間は、開閉弁９、減圧器１
゜を直列に接続して、接続している０又、室内側熱交換
器８及び室外側熱交換器４にはそれぞれ近接して室内側
送風機１１、室外側送風機１２が設置されている◎複数
の（例えば３台）の室内機８ａ、６ｂ、６ｃはそれぞれ
個別に運転可能であり、室内機 ６ａのみ運転の場合は
、他の室内機 ｅｂ 、ｅａは、膨張弁’ｙｂ
、７ｃを全開とすると共に室内側送風機１１ｂ、１１Ｃ
も停止している。又、このとき、圧縮機２はインバータ
等で能力制御を行ない、室内機６の運転台数に応じた能
力で運転される〇暖房運転時、特に低外気温時には、室
外側側熱交換器４での冷媒蒸発温度も低下し、室外側熱
交換器４の表面に着霜が生じて、熱交換能力が低下して
くるため、暖房能力も低下する。そこで除霜運転を行な
うため、運転中の室内機６の膨張弁７を全開とすると共
に冷媒循環量を増加させ除霜を速く終了させるため圧縮
機２の能力を最大とし、また開閉弁を開路させるととに
よってホットガスバイパスを行ない、また運転中の室内
側送風機１１を微風運転させることによって、室外側熱
交換器４へ高温高圧の冷媒を供給し、除霜を行なってい
た。2. Description of the Related Art A conventional heat pump type air conditioner having a plurality of indoor units has a compressor 2, a four-way valve 3, and an outdoor heat exchanger 4 installed in an outdoor unit 1, as shown in FIG. , outdoor expansion valve 6
Thus, the indoor expansion valve 7 and the indoor heat exchanger 8 installed in the indoor unit 6 are connected in parallel and sequentially connected in an annular manner to form a heat pump type refrigeration cycle. Also compressor 2
An on-off valve 9 and a pressure reducer 1 are connected between the discharge pipe 2a and the suction pipe 2b.
The indoor heat exchanger 8 and the outdoor heat exchanger 4 are connected in series, and an indoor blower 11 and an outdoor blower 12 are installed adjacent to the indoor heat exchanger 8 and the outdoor heat exchanger 4, respectively. The (for example, three) indoor units 8a, 6b, and 6c can be operated individually, and when only the indoor unit 6a is operated, the other indoor units eb and ea are connected to the expansion valve 'yb.
, 7c are fully opened, and the indoor fans 11b and 11C are turned on.
has also stopped. At this time, the capacity of the compressor 2 is controlled by an inverter, etc., and is operated at a capacity corresponding to the number of operating indoor units 6. During heating operation, especially at low outside temperatures, the outdoor side heat exchanger 4 The refrigerant evaporation temperature also decreases, frost forms on the surface of the outdoor heat exchanger 4, and the heat exchange capacity decreases, so the heating capacity also decreases. Therefore, in order to perform defrosting operation, the expansion valve 7 of the indoor unit 6 that is in operation is fully opened, the capacity of the compressor 2 is maximized to increase the amount of refrigerant circulation, and the defrosting process is completed quickly, and the on-off valve is opened. A hot gas bypass is carried out by turning on and off, and a high-temperature, high-pressure refrigerant is supplied to the outdoor heat exchanger 4 to perform defrosting by causing the indoor side blower 11 to perform a gentle breeze operation.
発明が解決しようとする問題点
しかしながら、この様な従来の除霜方式において、圧縮
機２の吐出管２ａ及び吸入管２ｂ間をバイパスする減圧
器１ｏによって決定されるホットガスバイパス量は、除
霜時間が最短となる最適バイパス量が存在しく第５図参
照）、室内機６の運転台数に応じて最適なバイパス量を
選定しなければ、室内機６の転転台数の変化により、除
霜時間が大きく変化したり、除霜運転中の室内機６の暖
房能力が十分得られなかったりするため、除霜運転中の
室温時下等に影響が出て、快適性の上で、非常に大きな
問題であった。Problems to be Solved by the Invention However, in such a conventional defrosting system, the amount of hot gas bypass determined by the pressure reducer 1o that bypasses between the discharge pipe 2a and the suction pipe 2b of the compressor 2 is There is an optimal amount of bypass for which the time is the shortest (see Figure 5), and if the optimal amount of bypass is not selected according to the number of indoor units 6 in operation, the defrosting time will change due to changes in the number of indoor units 6 in operation. If the indoor unit 6 changes significantly or the heating capacity of the indoor unit 6 during defrosting operation is not sufficient, the temperature and temperature of the room temperature during defrosting operation will be affected, resulting in a very big problem in terms of comfort. Met.
本発明は、上記従来の欠点を改善するもので、室内機運
転台数が変化しても、常に最適なバイパス量を得、低外
気温時の快適性の向上をはかるものである。The present invention aims to improve the above-mentioned conventional drawbacks, and even if the number of indoor units in operation changes, the optimum amount of bypass is always obtained, and comfort is improved at low outside temperatures.
問題点を解決するための手段
この目的を達成するために本発明は、除霜運転時の圧縮
機の吐出管と吸入管の間のバイパス流量を電動膨張弁等
の任意に流量を変化可能な流量調節弁によって変化させ
るという構成を備えたものである。Means for Solving the Problems In order to achieve this object, the present invention provides a bypass flow rate between the discharge pipe and the suction pipe of the compressor during defrosting operation, which can be changed arbitrarily using an electric expansion valve or the like. It has a configuration in which the flow rate is changed by a flow control valve.
作 用
本発明は、上記した構成によって、室内機の運転台数に
応じて、バイパス流量を変化させ、常に最適なバイパス
量を得ることによって、最短の除霜時間で除霜を行なう
ものである。Function The present invention defrosts in the shortest defrosting time by changing the bypass flow rate according to the number of operating indoor units and always obtaining the optimum amount of bypass using the above-described configuration.
実施例
以下に本発明の一実施例について図面を参考に説明を行
なうが、従来と同一構成については同一符号を付し、そ
の詳細な説明を省略する＠１６は流量調節弁で、任意に
全閉状態から流量を調節でき、圧縮機２の吐出管２ａと
吸入管２ｂの間をバイパスするように接続されている。Embodiment An embodiment of the present invention will be described below with reference to the drawings. Components that are the same as the conventional ones are given the same reference numerals, and detailed explanations thereof will be omitted. The flow rate can be adjusted from the closed state, and the compressor 2 is connected in a bypass manner between the discharge pipe 2a and the suction pipe 2b.
暖房運転時、室外側熱交換器４の着霜が進むと除霜運転
を開始する。この時、圧縮機２は冷媒循環量の増加、入
力の増加による供給熱量の増加のため、イ／バータ周波
数を上げる等して、最大能力とする。また運転中の室内
機６、例えば、室内機 ６ａ、室内機 ６ｂを運転、室
内機 ６Ｃを休止とすると膨張弁 ７ａ、７ｂを全
開、室外機１の膨張弁６を同様に全開とする。またこの
とき、室内側送風機 １１ａ、１１ｂを微風運転と
し、他の送風機１１ｃ、１２を停止する。During heating operation, when frost formation on the outdoor heat exchanger 4 progresses, defrosting operation is started. At this time, the compressor 2 increases the amount of refrigerant circulation and the amount of heat supplied due to the increase in input, so the i/verter frequency is increased, etc., to reach the maximum capacity. Further, when the indoor units 6 in operation, for example, the indoor units 6a and 6b, are operated and the indoor unit 6C is stopped, the expansion valves 7a and 7b are fully opened, and the expansion valve 6 of the outdoor unit 1 is similarly fully opened. At this time, the indoor blowers 11a and 11b are set to a gentle breeze operation, and the other blowers 11c and 12 are stopped.
かつ、流量調節弁１５を、室内機θの転転台数に応じた
弁開度とし、ホットガスバイパスを行ない、圧縮機２の
吐出冷媒ガス量の増加及び、吸入冷媒ガスの乾き度を大
きくする。In addition, the flow rate control valve 15 is set to a valve opening degree according to the number of indoor units θ, and hot gas bypass is performed to increase the amount of refrigerant gas discharged from the compressor 2 and the dryness of the suction refrigerant gas.
このとき、暖房運転している室内機６の台数が変化して
も、流量調節弁１６の弁開度を台数に応じて変化させる
ことにより、常に最適なバイパス量で、最短の除霜運転
が可能で、除霜運転性能への影響が無くなる。At this time, even if the number of indoor units 6 in heating operation changes, by changing the valve opening degree of the flow control valve 16 according to the number of indoor units 6, the shortest defrosting operation is always achieved with the optimum amount of bypass. possible, and there is no effect on defrosting operation performance.
発明の効果
上記実施例より明らかなように、本発明における空気調
和機は、暖房運転中の室内機の台数に応じて、流量調節
弁の弁開度を最適値としてホットガスバイパスを行ない
、かつ圧縮機能力を最大として除霜を行なうので、室内
運転台数の変化によっても、常に除霜運転を最短時間で
行ない、また安定した暖房能力を出すことができるので
、除霜運転の長時間化による室温降下を防ぎ、複数の室
内の快適空気調和の上で多大な効果を有するものである
。Effects of the Invention As is clear from the above embodiments, the air conditioner of the present invention performs hot gas bypass by setting the valve opening degree of the flow rate control valve to an optimum value according to the number of indoor units in heating operation, and Since defrosting is carried out by maximizing the compression function, defrosting operation can always be performed in the shortest possible time even when the number of units in operation indoors changes, and stable heating capacity can be produced, so even if the number of units in operation indoors changes, defrosting operation can be performed in the shortest possible time. It prevents room temperature from dropping and has a great effect on comfortable air conditioning in multiple rooms.
第１図は本発明の一実施例である空気調和機の冷凍シス
テム図、第２図は第１図の各要素の動作図、第３図は従
来の複数の室内機を有するヒートポンプ式空気調和機の
冷凍システム図、第４図は第３図の各要素の動作図、第
６図は流量調節弁と除霜時間の関係を示す特性図である
。
１・・・・・・室外機、２・・・・・・圧縮機、３・・
・・・・四方弁、４・・・・・・室外側熱交換器、５・
・・・・・室外側膨張弁、６ａ。
６ｂ 、６ｃ・・・・・・室内機 ・７ａ
・７ｂ。
７Ｃ・・・・・・室内側膨張弁、８ａ、８ｂ、８ｃ・・
・・・・室内側熱交換器、１１ａ、１１ｂ、１１ｃ・・
・・・・室内側送風機、１２・・・・・・室外側送風機
、１６・・・・・・流量調節弁。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名４２
図
第３図
第４図
第５図
バイパス（流量調爵弁）流量Figure 1 is a diagram of the refrigeration system of an air conditioner that is an embodiment of the present invention, Figure 2 is a diagram of the operation of each element in Figure 1, and Figure 3 is a conventional heat pump type air conditioner with multiple indoor units. Fig. 4 is a diagram of the refrigeration system of the machine, Fig. 4 is an operation diagram of each element shown in Fig. 3, and Fig. 6 is a characteristic diagram showing the relationship between the flow rate control valve and the defrosting time. 1...Outdoor unit, 2...Compressor, 3...
...Four-way valve, 4...Outdoor heat exchanger, 5.
...Outdoor expansion valve, 6a. 6b, 6c... Indoor unit ・7a
・7b. 7C...Indoor expansion valve, 8a, 8b, 8c...
...Indoor heat exchanger, 11a, 11b, 11c...
...Indoor blower, 12...Outdoor blower, 16...Flow control valve. Name of agent: Patent attorney Toshio Nakao and 1 other person42
Figure 3 Figure 4 Figure 5 Bypass (flow control valve) flow rate
Claims (1)
膨張弁を備えた室外機と膨張弁、室内側熱交換器、及び
室内側送風機を備えた複数の室内機とよりなり、前記圧
縮機は、室内機運転台数により能力を増減可能で、また
、吐出管及び吸入管の間は、流量調節弁により接続され
、暖房運転時の除霜運転時に、前記流量調節弁を前記室
内機運転台数に応じた弁開度に開路すると共に、運転中
の室内機の膨張弁を全開に、室内側送風機を微風運転、
室外機の膨張弁を全開、室外側送風機を停止することを
特徴とした空気調和機。It consists of an outdoor unit including a compressor, a four-way valve, an outdoor heat exchanger, an outdoor fan, and an expansion valve, and a plurality of indoor units each including an expansion valve, an indoor heat exchanger, and an indoor fan; The capacity of the compressor can be increased or decreased depending on the number of operating indoor units, and the discharge pipe and suction pipe are connected by a flow rate control valve, and the flow rate control valve is connected to the indoor unit during defrosting operation during heating operation. In addition to opening the circuit to the valve opening degree according to the number of operating units, the expansion valves of the indoor units in operation are fully opened, and the indoor blower is operated with a gentle breeze.
An air conditioner characterized by fully opening the expansion valve of the outdoor unit and stopping the outdoor fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30098386A JPH0754221B2 (en) | 1986-12-17 | 1986-12-17 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30098386A JPH0754221B2 (en) | 1986-12-17 | 1986-12-17 | Air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63153373A true JPS63153373A (en) | 1988-06-25 |
| JPH0754221B2 JPH0754221B2 (en) | 1995-06-07 |
Family
ID=17891418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30098386A Expired - Fee Related JPH0754221B2 (en) | 1986-12-17 | 1986-12-17 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0754221B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011007381A (en) * | 2009-06-24 | 2011-01-13 | Panasonic Corp | Refrigerating cycle device |
| US8108885B2 (en) | 2006-10-12 | 2012-01-31 | Panasonic Corporation | Disk cartridge |
| JP2014119122A (en) * | 2012-12-13 | 2014-06-30 | Mitsubishi Electric Corp | Refrigeration cycle device |
-
1986
- 1986-12-17 JP JP30098386A patent/JPH0754221B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8108885B2 (en) | 2006-10-12 | 2012-01-31 | Panasonic Corporation | Disk cartridge |
| JP2011007381A (en) * | 2009-06-24 | 2011-01-13 | Panasonic Corp | Refrigerating cycle device |
| JP2014119122A (en) * | 2012-12-13 | 2014-06-30 | Mitsubishi Electric Corp | Refrigeration cycle device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0754221B2 (en) | 1995-06-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |