JPH04190055A - Multi-chamber type air conditioner - Google Patents
Multi-chamber type air conditionerInfo
- Publication number
- JPH04190055A JPH04190055A JP32357390A JP32357390A JPH04190055A JP H04190055 A JPH04190055 A JP H04190055A JP 32357390 A JP32357390 A JP 32357390A JP 32357390 A JP32357390 A JP 32357390A JP H04190055 A JPH04190055 A JP H04190055A
- Authority
- JP
- Japan
- Prior art keywords
- expansion valve
- electric expansion
- temperature
- horsepower
- air 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.)
- Pending
Links
- 239000003507 refrigerant Substances 0.000 claims abstract description 75
- 238000004378 air conditioning Methods 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 3
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000007423 decrease Effects 0.000 description 15
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、多室型空気調和機に関する。[Detailed description of the invention] Industrial applications The present invention relates to a multi-room air conditioner.
従来の技術
近年、ビル空調において個別分散空調が進展しておシ、
特開平１−２１２８７０号公報において知られるような
多室型空気調和機の個別制御化が進められてきている。Conventional technology In recent years, individual distributed air conditioning has progressed in building air conditioning.
Individual control of multi-room air conditioners, as known from Japanese Patent Application Laid-Open No. 1-212870, has been progressing.
以下、図面を参考に従来の技術について説明する。The conventional technology will be described below with reference to the drawings.
１は多室型空気調和機の室外機であυ、能力可変圧縮機
２、四方弁３、室外熱交換器４、室外電動膨張弁５、外
気温度を検知する外気温度検知器４ａ、室外ファン６か
ら成っている。７は室内機で室外機１に４台並列に接続
され、それぞれ室内電動膨張弁８、室内熱交換器９、室
内ファン１゜から成っている（以下、室内機７を区別す
る場合は添字Ａ、Ｂ、Ｃ，Ｄを付ける）。１１は圧力検
であり圧力検知器１１によって検知される冷媒圧力に応
じてインバータ制御器１３により、インバータ１２の出
力周波数を変え、能力可変圧縮機２の運転周波数を変え
る。１４は室内機７と室外電動膨張弁６の間の配管に設
けられた冷媒温度検知器でろシ、この検知冷媒温度に応
じて室外電動膨張弁制御器１５により室外電動膨張弁５
の開度が制御される。１４ａは各室内機アがＯＮ 、
ＯＦ Ｆいｆれの状態かをリモートコントローラ１４ｂ
（以後リモコンと呼ぶ）の設定等から判断して室内機７
の合計運転馬力数を検出する運転馬力数検出器である。1 is an outdoor unit of a multi-room air conditioner υ, a variable capacity compressor 2, a four-way valve 3, an outdoor heat exchanger 4, an outdoor electric expansion valve 5, an outside air temperature detector 4a that detects outside air temperature, and an outdoor fan. It consists of 6. Reference numeral 7 denotes indoor units, which are connected in parallel to the outdoor unit 1, and each consists of an indoor electric expansion valve 8, an indoor heat exchanger 9, and an indoor fan 1°. , B, C, D). Reference numeral 11 denotes a pressure detector, and in accordance with the refrigerant pressure detected by the pressure detector 11, the inverter controller 13 changes the output frequency of the inverter 12 and changes the operating frequency of the variable capacity compressor 2. 14 is a refrigerant temperature detector installed in the pipe between the indoor unit 7 and the outdoor electric expansion valve 6; the outdoor electric expansion valve 5 is controlled by the outdoor electric expansion valve controller 15 according to the detected refrigerant temperature;
The opening degree is controlled. 14a, each indoor unit is ON,
Use the remote controller 14b to check whether it is in the OFF state.
Judging from the settings of the indoor unit 7 (hereinafter referred to as the remote control),
This is an operating horsepower number detector that detects the total operating horsepower number.
１６は室内機７の吸込空気の温度を検知する空気温度検
知器であシ、この検知空気温度とリモコン１４ｂで設定
される室温設定値とから空調負荷算出器１７により部屋
の空調負荷を算出し、この算出された空調負荷に応じて
室内電動膨張弁制御器１８により室内電動膨張弁８の開
度が制御される。Reference numeral 16 denotes an air temperature detector that detects the temperature of the intake air of the indoor unit 7, and the air conditioning load calculator 17 calculates the air conditioning load of the room from this detected air temperature and the room temperature setting value set by the remote controller 14b. The opening degree of the indoor electric expansion valve 8 is controlled by the indoor electric expansion valve controller 18 according to the calculated air conditioning load.
以上のように構成された多室型空気調和機の暖房の動作
について説明する。The heating operation of the multi-room air conditioner configured as above will be explained.
能力可変圧縮機２から吐出された高温高圧の冷媒は、四
方弁３を通り室内熱交換器９に流入して凝縮液化し、室
内電動膨張弁８を介して室外電動膨張弁５で減圧され、
室外熱交換器４で蒸発気化し、再び四方弁３を通シ能力
可変圧縮機２にもどる。The high-temperature, high-pressure refrigerant discharged from the variable capacity compressor 2 flows into the indoor heat exchanger 9 through the four-way valve 3, condenses and liquefies, and is depressurized by the outdoor electric expansion valve 5 via the indoor electric expansion valve 8.
It is evaporated in the outdoor heat exchanger 4, passed through the four-way valve 3, and returned to the variable capacity compressor 2.
この時、能力可変圧縮機２は、その時の空調負荷に応じ
て変化する圧力検知器１１により検知された（Ｓｌ）検
知圧力（暖房時は凝縮圧力）が、予め決められた所定の
圧力になるように（Ｓ２ 、 Ｓ３ ）インバータ制御
器１３によりインバータ１２を制御して（Ｓ４．Ｓｓ）
、検知圧力が所定の圧力より高い時は低速方向、低い時
は高速方向に運お周波数が制御されて能力が可変される
。At this time, in the variable capacity compressor 2, the detected pressure (Sl) detected by the pressure detector 11 (condensing pressure during heating), which changes depending on the air conditioning load at that time, becomes a predetermined pressure. The inverter 12 is controlled by the inverter controller 13 as (S2, S3) (S4.Ss).
When the detected pressure is higher than a predetermined pressure, the speed is low, and when it is low, the speed is high.The frequency is controlled and the capacity is varied.
また、室外電動膨張弁６の開度は、冷媒温度検知器１４
により検知された検知冷媒温度に応じて室外電動膨張弁
制御器１６によ多制御されるが、具体的には予め表のよ
うに運転状態が最適となる冷媒温度を外気温度と運転台
数に応じて区分して設定しておき、運転中、外気温度検
知器４ａと運転馬力数検出器１４ａにより現在の外気温
度と室内機７の運転馬力数を検出して（Ｓｓ、Ｓ７）、
冷媒の設定温度がどの区分の値となるかを判断して決定
しくＳ８）、次に冷媒温度検知器１４により検知された
室内機７と室外電動膨張弁６の間の冷媒温度（Ｓ９）が
、設定した冷媒温度になるように（８１０，Ｓｌ １
）（所定の過冷却度になるように）室外電動膨張弁制御
器１６により、検知温度が所定の温度より高い時は閉方
向、低い時は開方向に制御される（Ｓ１２）。Further, the opening degree of the outdoor electric expansion valve 6 is determined by the refrigerant temperature sensor 14.
The outdoor electric expansion valve controller 16 controls the refrigerant temperature according to the detected refrigerant temperature, but specifically, the refrigerant temperature at which the operating condition is optimal is determined in advance according to the outside air temperature and the number of operating units as shown in the table. During operation, the outside air temperature detector 4a and the operating horsepower number detector 14a detect the current outside temperature and the operating horsepower number of the indoor unit 7 (Ss, S7).
The temperature of the refrigerant between the indoor unit 7 and the outdoor electric expansion valve 6 detected by the refrigerant temperature detector 14 is then determined (S8). , so that the set refrigerant temperature is reached (810, Sl 1
) When the detected temperature is higher than a predetermined temperature, the outdoor electric expansion valve controller 16 controls the closed direction (so that a predetermined degree of supercooling is achieved), and when the detected temperature is lower than the predetermined temperature, it is controlled in the open direction (S12).
さらに、室内電動膨張弁８の開度は、リモコン１４ｂで
設定された室温設定値と空気温度検知器１６で検知され
る室内機７の吸込空気の温度がら空調負荷算出器１７に
より部屋の空調負荷を算出し、この算出された空調負荷
に応じて、空調負荷が大きい時は開方向、小さい時は閉
方向に制御される。Further, the opening degree of the indoor electric expansion valve 8 is determined by the air conditioning load calculator 17 based on the room temperature set value set by the remote controller 14b and the temperature of the intake air of the indoor unit 7 detected by the air temperature detector 16. According to the calculated air conditioning load, when the air conditioning load is large, the control is performed in the open direction, and when it is small, the control is performed in the closed direction.
また、室外機１側の制御要素である能力可変圧縮機２の
運転周波数と室外電動膨張弁６の開度と、室内機７側の
制御要素である室内電動膨張弁８の開度は互いに独立し
て制御される。Furthermore, the operating frequency of the variable capacity compressor 2 and the opening degree of the outdoor electric expansion valve 6, which are control elements on the outdoor unit 1 side, and the opening degree of the indoor electric expansion valve 8, which are control elements on the indoor unit 7 side, are independent of each other. controlled by
発明が解決しようとする課題
しかしながら、上記のような構成では、次に述べる様な
課題が生じる。所定の圧力を１６ＫＦ／１−ｍｌとし、
例えば外気温度７℃、運転馬力数が１馬力で運転してい
る場合、設定冷媒温度は表！二から１１．２℃に決別さ
れ、検知冷媒温度が１１．２℃より高い場合は閉方向に
、１１．２℃より低い場合には開方向に室外電動膨張弁
５の開度は制御されて冷媒温度を設定冷媒温度に近付け
る。やがて室外電動膨張弁６の開度が２００ステツプで
冷媒温度が設定冷媒温度に等しくなったとすると外気温
度変化や運転馬力数の変化等による設定冷媒温度の変化
、あるいはシステム変動による検知冷媒温度の変化がな
いかぎり室外電動膨張弁８の開度は２００ステツプのま
ま運転される（室外電動膨張弁５の開度は最小時０ヌテ
ップ、最大時４００ステツプとする）。Problems to be Solved by the Invention However, with the above configuration, the following problems occur. The predetermined pressure is 16KF/1-ml,
For example, if the outside temperature is 7°C and the operating horsepower is 1 horsepower, the set refrigerant temperature is as shown below! When the detected refrigerant temperature is higher than 11.2°C, the opening degree of the outdoor electric expansion valve 5 is controlled in the closing direction, and when it is lower than 11.2°C, the opening degree of the outdoor electric expansion valve 5 is controlled in the opening direction. Bring the refrigerant temperature closer to the set refrigerant temperature. If the refrigerant temperature eventually becomes equal to the set refrigerant temperature when the outdoor electric expansion valve 6 opens 200 steps, the set refrigerant temperature will change due to changes in outside air temperature, changes in operating horsepower, etc., or changes in the detected refrigerant temperature due to system fluctuations. Unless otherwise specified, the opening degree of the outdoor electric expansion valve 8 remains at 200 steps (the opening degree of the outdoor electric expansion valve 5 is 0 steps at the minimum and 400 steps at the maximum).
つぎに停止室内接子のうち何台かを運転させて運転馬力
数が５馬力になったとする。このとき設定冷媒温度は表
に従って３．７℃に変更される。すると変更直前の検知
冷媒温度が１１．２℃で設定冷媒温度に対して高い為、
室外電動膨張弁５の開度は閉方向に制御されて検知冷媒
温度を設定冷媒温度に近付けようとする。しかし室外電
動膨張弁８が閉じられることにより凝縮圧力は上昇する
ので検知圧力は所定の圧力１６に９．／ｄより高くなり
能力可変圧縮機２の能力は低速方向に制御される。Next, it is assumed that some of the joints in the stopped room are operated and the operating horsepower becomes 5 horsepower. At this time, the set refrigerant temperature is changed to 3.7°C according to the table. Then, the detected refrigerant temperature just before the change was 11.2℃, which is higher than the set refrigerant temperature.
The opening degree of the outdoor electric expansion valve 5 is controlled in the closing direction to bring the detected refrigerant temperature closer to the set refrigerant temperature. However, when the outdoor electric expansion valve 8 is closed, the condensing pressure increases, so the detected pressure becomes the predetermined pressure 9. /d, the capacity of the variable capacity compressor 2 is controlled in the low speed direction.
つまり、運転馬力数が増加したにも拘らず室外電動膨張
弁６が閉じられ能力可変圧縮機２の能力も小さくなるの
で冷媒循環量が小さくなって暖房能力が低下してしまう
といった現象が生じる。In other words, even though the operating horsepower has increased, the outdoor electric expansion valve 6 is closed and the capacity of the variable capacity compressor 2 is also reduced, resulting in a decrease in the amount of refrigerant circulation and a decrease in heating capacity.
また、所定の圧力を１６Ｋｙ／ｄとし例えば外気温度６
℃、運転馬力数が１馬力で運転している場合、設定冷媒
温度は同様に表から１１．２℃に決定され、検知冷媒温
度１１．２℃より高い場合は閉方向に、１１．２℃より
低い場合には開方向に室外電動膨張弁５の開度は制御さ
れて冷媒温度を設定冷媒温度に近付ける。やがて室外電
動膨張弁５の開度が２００ステツプで冷媒温度が設定冷
媒温度に等しくなったとすると室外電動膨張弁６の開度
は２００ステツプのまま運転される。Also, if the predetermined pressure is 16Ky/d, and the outside temperature is 6Ky/d, for example,
℃, and when operating at 1 horsepower, the set refrigerant temperature is similarly determined from the table to 11.2℃, and if the detected refrigerant temperature is higher than 11.2℃, the setting is 11.2℃ in the closing direction. If the temperature is lower, the opening degree of the outdoor electric expansion valve 5 is controlled in the opening direction to bring the refrigerant temperature closer to the set refrigerant temperature. If the opening degree of the outdoor electric expansion valve 5 eventually becomes 200 steps and the refrigerant temperature becomes equal to the set refrigerant temperature, the operation continues with the opening degree of the outdoor electric expansion valve 6 remaining at 200 steps.
次に外気温度が６℃に下がると設定冷媒温度は表層＃に
従って６．Ｃ）Ｃに変更される。すると変更直前の検知
冷媒温度が１１．２℃で設定冷媒温度に対して高い為、
室外電動膨張弁６の開度は閉方向に制御されて検知冷媒
温度を設定冷媒温度に近付けようとする。しかし室外電
動膨張弁６が閉じられることにより凝縮圧力は上昇する
ので検知圧力は所定の圧力１６に９／ｃｄより高くなシ
能力可変圧縮機２の能力は低速方向に制御される。つま
シこの場合ではより高い暖房能力が必要となる低い外気
温度の時に逆に暖房能力が低くなるといった現象が生じ
る。Next, when the outside air temperature drops to 6℃, the set refrigerant temperature is set to 6. C) changed to C. Then, the detected refrigerant temperature just before the change was 11.2℃, which is higher than the set refrigerant temperature.
The opening degree of the outdoor electric expansion valve 6 is controlled in the closing direction to bring the detected refrigerant temperature closer to the set refrigerant temperature. However, when the outdoor electric expansion valve 6 is closed, the condensing pressure increases, so that if the detected pressure is higher than the predetermined pressure 16 (9/cd), the capacity of the variable capacity compressor 2 is controlled in the low speed direction. In this case, a phenomenon occurs in which the heating capacity decreases when the outside temperature is low, which requires higher heating capacity.
すなわち運転馬力数が大きくなったυ外気温度が低くな
って設定冷媒温度が変わる場合に変わった後の設定温度
が変わるまえの設定冷媒温度よシ低いと上述の様に暖房
能力の低下を生じるといった課題を有していた。In other words, if the set refrigerant temperature changes as the operating horsepower increases and the outside air temperature decreases, the heating capacity will decrease as described above if the set temperature after the change is lower than the set refrigerant temperature before the change. I had an issue.
これを解決する方法としては運転馬力数が増加したり外
気温度が低くなるにつれて必ず設定冷媒温度を高くして
おく方法が考えられるが、この場合だとその時の運転馬
力数や外気温度での最適な冷媒温度からはずれる為に、
最適な冷媒温度での運転にくらべてシステムの運転効率
が低下したり暖房能力が低下したシするため適当な方法
であるとはいえない。One possible way to solve this problem is to always increase the set refrigerant temperature as the operating horsepower increases or the outside temperature decreases, but in this case, the optimal refrigerant temperature at that operating horsepower and outside temperature decreases. Because the refrigerant temperature deviates from the
This cannot be said to be an appropriate method because the operating efficiency of the system and the heating capacity are reduced compared to operating at the optimum refrigerant temperature.
本発明は上記従来の課題を解決するもので、運転馬力数
が増加したり外気温度が低下した場合の能力低下を防ぎ
、快適性の向上を図るものである。The present invention solves the above-mentioned conventional problems, and aims to improve comfort by preventing a decrease in performance when the operating horsepower increases or the outside temperature decreases.
課題を解決するだめの手段
上記課題を解決するために本発明の多室型空気調和機は
、インバータにより能力可変する圧縮機、四方弁、室外
熱交換器、室外電動膨張弁、外気温度を検知する外気温
度検知器を備えた室外機と、弁間の配管に圧力検知器を
設け、この検知圧力にに設は冷媒温度を検知する冷媒温
度検知器と、前記室内機の運転馬力数を検出する運転馬
力数検出空気温度を検知する空気温度検知器と、検知空
気する室内電動膨張弁制御器とを設け、外気温度または
前記室内機の運転馬力数の変化に応じて前記室外電動膨
張弁を一旦、所定開度に開けるようにした構成としたも
のである。Means for Solving the Problems In order to solve the above problems, the multi-room air conditioner of the present invention includes a compressor whose capacity can be varied by an inverter, a four-way valve, an outdoor heat exchanger, an outdoor electric expansion valve, and a sensor that detects outside air temperature. An outdoor unit equipped with an outside air temperature detector and a pressure detector installed in the piping between the valves, and a refrigerant temperature detector installed at this detected pressure to detect the refrigerant temperature and the operating horsepower of the indoor unit. an air temperature sensor that detects an operating horsepower number to detect air temperature; and an indoor electric expansion valve controller that detects the air temperature; It is configured such that it is once opened to a predetermined opening degree.
作 用
本発明は、上記した構成により、暖房運転中、運転馬力
数が増加したシ外気温度が低下した際には設定冷媒温度
の変化に拘らず空外電動膨張弁を！旦所定開度に開ける
ようにして、室外電動膨張弁の絞シ過ぎとこれに伴う能
力可変圧縮機の運転周波数の低下による暖房能力の低下
が生じないようにするものである。Effects The present invention has the above-described configuration, so that during heating operation, when the operating horsepower increases, and when the outside air temperature drops, the air-powered electric expansion valve is activated regardless of the change in the set refrigerant temperature! By opening the outdoor electric expansion valve to a predetermined opening degree, the heating capacity is prevented from being reduced due to excessive throttling of the outdoor electric expansion valve and the resulting reduction in the operating frequency of the variable capacity compressor.
実施例
以下本発明の一実施例における多室型空気調和機につい
て、第１図及び第２図を参考に説明するが、構成につい
ては従来例と同様であるので、その詳細な説明を省略す
る。EXAMPLE A multi-room air conditioner according to an embodiment of the present invention will be described below with reference to FIGS. 1 and 2, but since the configuration is the same as the conventional example, detailed explanation thereof will be omitted. .
第１図は室外機側制御要素の制御フローを示しておシ、
検知した外気温度と運転台数から、新たな冷媒温度を設
定した直後に前回の冷媒温度の設定区分から変化してい
るかどうかを判定し、変化しておれば室外電動膨張弁を
一旦、所定の開度に開ける制御を追加している。Figure 1 shows the control flow of the outdoor unit side control elements.
Immediately after setting a new refrigerant temperature, it is determined whether the refrigerant temperature has changed from the previous refrigerant temperature setting category based on the detected outside air temperature and the number of operating units. Added control to open at once.
次に上記構成の暖房運転の動作について説明する。尚、
冷媒システムの動作は従来例と同様の為説明を省略する
。Next, the operation of the heating operation with the above configuration will be explained. still,
The operation of the refrigerant system is the same as that of the conventional example, so a description thereof will be omitted.
多室型空気調和機が例えば所定の圧力を１６切夕とし、
例えば外気温度７℃（Ｓ６）、運転馬力数が１馬力（Ｓ
７）で運転している場合、設定冷媒温度は表！＝から１
１．２℃に決定され（Ｓ８）、検知冷媒温度が１１．２
℃より高い場合は閉方向に、１１．２℃より低い場合に
は開方向に室外電動膨張弁６の開度は制御されて（Ｓ１
１ 、Ｓ１２，５１３）冷媒温度を設定冷媒温度に近付
ける。やがて室外電動膨張弁５の開度が２ｏＯヌテツプ
で冷媒温度が設定冷媒温度に等しくなったとすると室外
電動膨張弁６の開度は２００ステツプの１ま運転される
。For example, a multi-room air conditioner has a predetermined pressure of 16 degrees,
For example, the outside temperature is 7℃ (S6), the operating horsepower is 1 horsepower (S6), and the operating horsepower is 1 horsepower (S6).
7), the set refrigerant temperature is as shown in the table! = to 1
It is determined to be 1.2℃ (S8), and the detected refrigerant temperature is 11.2℃.
The opening degree of the outdoor electric expansion valve 6 is controlled in the closing direction when the temperature is higher than 11.2°C, and in the opening direction when the temperature is lower than 11.2°C (S1
1, S12, 513) Bring the refrigerant temperature closer to the set refrigerant temperature. If the opening degree of the outdoor electric expansion valve 5 eventually becomes 200 steps and the refrigerant temperature becomes equal to the set refrigerant temperature, the opening degree of the outdoor electric expansion valve 6 is operated to 1 of 200 steps.
つぎに停止室内機のうち何台かを運転させて運転馬力数
〃）６馬力になった（Ｓ９）とする。このとき設定冷媒
温度は表；ヰに従って３・７℃に変更されるが直後に前
回の冷媒温度の設定区分から変化していることを認識し
、室外電動膨張弁６を一旦、所定の開度（この場合３０
０ステツプとする）まで開ける（Ｓ１４）制御赤作動し
て室外電動膨張弁制御器１６により室外電動膨張弁６は
３００ステツプまで開く。すると凝縮圧力が下がって検
知圧力が所定の圧力１ｅＫｇ／ｒ−Ｍより下がるためイ
ンバータ制御器１３からインバータ１２を介して能力可
変圧縮機２に運転周波数を上げるように指示し、運転周
波数は上昇する。その後冷媒温度検知器１４により検知
した冷媒温度（Ｓ１０）が設定冷媒温度３．７℃よシ高
ければ室外電動膨張弁制御器１６によって室外電動膨張
弁５が閉方向に徐々に制御されて（Ｓ１１．Ｓ１２，５
１３）やがて冷媒温度が設定冷媒温度に等しくなる。こ
の場合、運転周波数は１馬力運転時に比べて上昇してい
るため冷媒温度が設定冷媒温度に等しくなった時の室外
電動膨張弁５の開度は２ｏｏヌテツプ以下になることは
ない。つまシ運転馬力数が変化して多くなったときに一
旦、室外電動膨張弁６を開けることて運転周波数も上昇
させ、上昇した運転周波数にみあった開度に室外電動膨
張弁５を閉じていくことでその時の運転条件に適正な設
定冷媒温度に近付けることであわ、運転馬力数が変化し
た場合において適正な制御方法となる。Next, it is assumed that some of the stopped indoor units are operated and the operating horsepower becomes 6 horsepower (S9). At this time, the set refrigerant temperature is changed to 3.7°C according to the table below, but immediately after recognizing that it has changed from the previous refrigerant temperature setting category, the outdoor electric expansion valve 6 is temporarily adjusted to the predetermined opening. (in this case 30
(S14) The outdoor electric expansion valve 6 is opened up to 300 steps by the outdoor electric expansion valve controller 16. Then, the condensing pressure decreases and the detected pressure decreases below the predetermined pressure 1eKg/r-M, so the inverter controller 13 instructs the variable capacity compressor 2 to increase the operating frequency via the inverter 12, and the operating frequency increases. . Thereafter, if the refrigerant temperature (S10) detected by the refrigerant temperature detector 14 is higher than the set refrigerant temperature of 3.7°C, the outdoor electric expansion valve 5 is gradually controlled in the closing direction by the outdoor electric expansion valve controller 16 (S11). .S12,5
13) Eventually, the refrigerant temperature becomes equal to the set refrigerant temperature. In this case, since the operating frequency is higher than when operating at 1 horsepower, the opening degree of the outdoor electric expansion valve 5 when the refrigerant temperature becomes equal to the set refrigerant temperature does not become less than 2oo Nutep. When the operating horsepower number changes and increases, the operating frequency is increased by once opening the outdoor electric expansion valve 6, and the outdoor electric expansion valve 5 is closed to an opening degree that matches the increased operating frequency. By doing so, the refrigerant temperature can be brought close to the set refrigerant temperature appropriate for the operating conditions at that time, and this becomes an appropriate control method when the operating horsepower number changes.
尚、外気温度が変化した場合も上記と同様の動作となる
。Note that the same operation as described above occurs when the outside air temperature changes.
従って、従来の様に運転馬力数や外気温度が変化した場
合でも室外電動膨張弁６の絞υ過ぎといった現象が生じ
ず、能力低下によって快適性が低下するといったことを
防止することができる。Therefore, even if the operating horsepower or the outside air temperature changes as in the conventional case, the outdoor electric expansion valve 6 is not throttled too much υ, and it is possible to prevent a decrease in comfort due to a decrease in performance.
発明の効果
以上の説明から明らかなように、本発明は、インバータ
により能力可変する圧縮機、四方弁、室外熱交換器、室
外電動膨張弁、外気温度を検知する外気温度検知器を備
えた室外機と、室内電動膨に圧力検知器を設け、この検
知圧力に応じてイン温度を検知する冷媒温度検知器と、
前記室内機の運転馬力数を横比する運転馬力数検出器と
、検知検知する空気温度検知器と、検知空気温度と室温
電動膨張弁制御器とを設け、外気温度または前記室内機
の運転馬力数の変化に応じて前記室外電動膨張弁を一旦
、所定開度に開けるようにしたので、運転馬力数や外気
温度が変化した場合でも室外電動膨張弁６の絞シ過ぎと
いった現象が生じず、能力低下によって快適性が低下す
るといったことを防止することができる。Effects of the Invention As is clear from the above description, the present invention provides an outdoor compressor equipped with a compressor whose capacity is varied by an inverter, a four-way valve, an outdoor heat exchanger, an outdoor electric expansion valve, and an outside air temperature detector that detects outside air temperature. and a refrigerant temperature detector that detects the inside temperature in accordance with the detected pressure by installing a pressure detector in the indoor electric expansion machine,
An operating horsepower number detector that horizontally compares the operating horsepower number of the indoor unit, an air temperature detector that detects the detected air temperature, and a room temperature electric expansion valve controller are provided. Since the outdoor electric expansion valve is once opened to a predetermined opening degree in response to a change in the number, even if the operating horsepower number or outside temperature changes, a phenomenon such as over-throttling of the outdoor electric expansion valve 6 does not occur. It is possible to prevent a decrease in comfort due to a decrease in performance.
第１図は本発明の一実施例である多室型空気調和機の冷
凍サイクル図、第２図は第１図で示した空気調和機の室
外機側制御要素の制御フローチャート、第３図は従来の
多室型空気調和機の冷凍サイクル図、第４図は同室外機
側制御要素の制御フローチャートである。
１・・・・・・室外機、２・・・・・・能力可変圧縮機
、３・・・・・・四方弁、４・・・・・・室外熱交換器
、６・・・・・・室外電動膨張弁、６ａ・・・・・・外
気温度検知器、７・・・・・・室内機、８・・・・・・
室内電動膨張弁、９・・・・・・室内熱交換器、１１・
・・・・・圧力検知器、１２・・・・・・インバータ、
１３・・−・・・インバータ制御器、１４・・・・・・
冷媒温度検知器、１４ａ・・・・・・運転馬力数検出器
、１６・・・・・・室外電動膨張弁制御器、１６・・・
・・・空気温度検知器、１７・・・・・・空気負荷算出
器、１８・・・・・・室内電動膨張弁制御器。
代理人の氏名 弁理士 小鍜治 明 ほか２名お ２
区
第 ３ 図
を
第 ４ 図Fig. 1 is a refrigeration cycle diagram of a multi-room air conditioner that is an embodiment of the present invention, Fig. 2 is a control flow chart of the outdoor unit side control elements of the air conditioner shown in Fig. 1, and Fig. 3 is a FIG. 4, which is a refrigeration cycle diagram of a conventional multi-room air conditioner, is a control flowchart of control elements on the outdoor unit side. 1... Outdoor unit, 2... Variable capacity compressor, 3... Four-way valve, 4... Outdoor heat exchanger, 6...・Outdoor electric expansion valve, 6a...Outside air temperature detector, 7...Indoor unit, 8...
Indoor electric expansion valve, 9... Indoor heat exchanger, 11.
...Pressure detector, 12...Inverter,
13... Inverter controller, 14...
Refrigerant temperature detector, 14a...Operating horsepower number detector, 16...Outdoor electric expansion valve controller, 16...
... Air temperature detector, 17 ... Air load calculator, 18 ... Indoor electric expansion valve controller. Name of agent: Patent attorney Akira Kokaji and 2 others
Ward Figure 3 to Figure 4
Claims (1)
交換器、室外電動膨張弁、外気温度を検知する外気温度
検知器を備えた室外機と、室内電動膨張弁、室内熱交換
器とを各々備えた複数の室内機を並列的に接続し、前記
室内機と前記四方弁間の配管に圧力検知器を設け、この
圧力検知器の検知圧力に応じてインバータの出力周波数
を制御するインバータ制御器と、前記室内機と前記室外
電動膨張弁間の配管に設け冷媒温度を検知する冷媒温度
検知器と、前記室内機の運転馬力数を検出する運転馬力
数検出器と、検知外気温度および検知室内機運転台数お
よび検知冷媒温度に応じて前記室外電動膨張弁開度を制
御する室外電動膨張弁制御器と、前記室内機の吸込空気
温度を検知する空気温度検知器と、検知空気温度と室温
設定値から演算する室調負荷算出器と、この空調負荷算
出器によって算出された空調負荷に応じて前記室内電動
膨張弁開度を制御する室内電動膨張弁制御器とを設け、
外気温度または前記室内機の運転馬力数の変化に応じて
前記室外電動膨張弁を一旦、所定開度に開けるようにし
た多室型空気調和機。Equipped with an outdoor unit equipped with a compressor whose capacity can be varied by an inverter, a four-way valve, an outdoor heat exchanger, an outdoor electric expansion valve, and an outside air temperature detector that detects the outside air temperature, an indoor electric expansion valve, and an indoor heat exchanger. an inverter controller in which a plurality of indoor units are connected in parallel, a pressure detector is provided in piping between the indoor unit and the four-way valve, and the output frequency of the inverter is controlled according to the pressure detected by the pressure detector; , a refrigerant temperature detector installed in a pipe between the indoor unit and the outdoor electric expansion valve to detect the refrigerant temperature, an operating horsepower number detector to detect the operating horsepower number of the indoor unit, a detected outside air temperature, and a detected indoor unit. an outdoor electric expansion valve controller that controls the opening degree of the outdoor electric expansion valve according to the number of operating units and the detected refrigerant temperature; an air temperature detector that detects the intake air temperature of the indoor unit; and the detected air temperature and room temperature set value. and an indoor electric expansion valve controller that controls the opening degree of the indoor electric expansion valve according to the air conditioning load calculated by the air conditioning load calculator,
A multi-room air conditioner in which the outdoor electric expansion valve is once opened to a predetermined opening degree in response to changes in outside air temperature or operating horsepower of the indoor unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32357390A JPH04190055A (en) | 1990-11-26 | 1990-11-26 | Multi-chamber type air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32357390A JPH04190055A (en) | 1990-11-26 | 1990-11-26 | Multi-chamber type air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04190055A true JPH04190055A (en) | 1992-07-08 |
Family
ID=18156216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32357390A Pending JPH04190055A (en) | 1990-11-26 | 1990-11-26 | Multi-chamber type air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04190055A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1038063C (en) * | 1992-09-26 | 1998-04-15 | 三洋电机株式会社 | Method for controlling of air-conditioner |
| CN1041555C (en) * | 1992-09-26 | 1999-01-06 | 三洋电机株式会社 | Method for controlling of air-conditioner |
| CN104729023A (en) * | 2015-04-09 | 2015-06-24 | 宁波奥克斯电气有限公司 | Dynamic refrigerant balance control method used in heating process of multi-connected air-conditioner unit |
-
1990
- 1990-11-26 JP JP32357390A patent/JPH04190055A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1038063C (en) * | 1992-09-26 | 1998-04-15 | 三洋电机株式会社 | Method for controlling of air-conditioner |
| CN1041555C (en) * | 1992-09-26 | 1999-01-06 | 三洋电机株式会社 | Method for controlling of air-conditioner |
| CN104729023A (en) * | 2015-04-09 | 2015-06-24 | 宁波奥克斯电气有限公司 | Dynamic refrigerant balance control method used in heating process of multi-connected air-conditioner unit |
| CN104729023B (en) * | 2015-04-09 | 2017-10-17 | 宁波奥克斯电气股份有限公司 | The dynamic equilibrium control method of refrigerant when VRF Air Conditioning System is heated |
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