JPH0626713A - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JPH0626713A JPH0626713A JP4184174A JP18417492A JPH0626713A JP H0626713 A JPH0626713 A JP H0626713A JP 4184174 A JP4184174 A JP 4184174A JP 18417492 A JP18417492 A JP 18417492A JP H0626713 A JPH0626713 A JP H0626713A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- evaporator
- compressor
- detected
- acceleration
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/26—Problems to be solved characterised by the startup of the refrigeration cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/021—Inverters therefor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、圧縮機の加速度を蒸発
器の状態に適合させて制御するようにした空気調和機に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner adapted to control the acceleration of a compressor by adjusting it to the condition of an evaporator.
【０００２】[0002]
【従来の技術】従来、圧縮機の回転数をインバータによ
って制御する空気調和機では、圧縮機を起動してからそ
の回転数が目標の回転数に達するまで、加速度を一定に
するように制御している。他方、圧縮機の吐出ガスの温
度を検出するセンサを設け、圧縮機の吐出温度に応じて
回転加速度を増減する制御も行なえるようにした空気調
和機も知られている。2. Description of the Related Art Conventionally, in an air conditioner in which the number of revolutions of a compressor is controlled by an inverter, the acceleration is controlled to be constant until the number of revolutions reaches a target number of revolutions after starting the compressor. ing. On the other hand, there is also known an air conditioner that is provided with a sensor that detects the temperature of the gas discharged from the compressor and that can also perform control to increase or decrease the rotational acceleration according to the discharge temperature of the compressor.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、圧縮機
の回転加速度を一定に制御するときには、冷房開始時の
騒音が大きいことが問題となっている。これは、圧縮機
起動時に蒸発器の内部で発生する混相流によるものと考
えられている。同様に、吐出温度に応じて回転加速度を
制御する場合でも、蒸発器の状態とは無関係に制御する
ので、騒音が発生するのを防ぐことができない。このた
め、従来から起動時の騒音を抑制しながら圧縮機の回転
数を上げて静粛な運転を開始できるようにすることが課
題とされている。However, when the rotational acceleration of the compressor is controlled to be constant, there is a problem that the noise at the start of cooling is large. It is considered that this is due to the multiphase flow generated inside the evaporator when the compressor is started. Similarly, even when the rotational acceleration is controlled according to the discharge temperature, since it is controlled regardless of the state of the evaporator, it is not possible to prevent noise from being generated. For this reason, it has been a conventional problem to increase the rotational speed of the compressor while suppressing noise at the time of startup so that quiet operation can be started.
【０００４】そこで、本発明の目的は、上記従来技術の
有する問題点を解消し、圧縮機の回転加速度を蒸発器の
状態に適合させながら制御することで、騒音の低減を図
ることのできる空気調和機を提供することにある。Therefore, an object of the present invention is to eliminate the problems of the above-mentioned prior art and to control the rotational acceleration of the compressor while adjusting it to the state of the evaporator, thereby reducing noise. To provide a harmony machine.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に、本発明は、室内温度検出器と、この室内温度検出器
で検出された室温と、設定温度との差に応じて圧縮機の
回転数を決定し、圧縮機の回転を制御するようにした空
気調和機において、蒸発器の冷媒配管出口側の温度を検
出する第１の温度検出器と、前記蒸発器の冷媒配管中間
部分の温度を検出する第２の温度検出器と、前記第２の
温度検出器と第１の温度検出器との検出温度差に基づい
て検出された過熱度に応じて、前記決定された圧縮器の
回転数へ移行する加速度を増減制御するようにした制御
部を設けて構成したものである。In order to achieve the above-mentioned object, the present invention provides an indoor temperature detector, and a compressor of a compressor according to a difference between a room temperature detected by the indoor temperature detector and a preset temperature. In an air conditioner that determines the number of revolutions and controls the rotation of the compressor, a first temperature detector that detects the temperature on the refrigerant pipe outlet side of the evaporator and an intermediate portion of the refrigerant pipe of the evaporator. A second temperature detector for detecting a temperature, and a degree of superheat detected based on a detected temperature difference between the second temperature detector and the first temperature detector The control unit is configured to increase or decrease the acceleration that shifts to the rotation speed.
【０００６】[0006]
【作用】本発明によれば、蒸発器の冷媒配管出口側およ
び中間部分の温度が検出され、その温度差から蒸発器の
過熱度が検出される。圧縮機を起動してその回転数が設
定温度と室温との温度差から決定された回転数に移行す
るまでは、この過熱度の程度に応じて回転加速度が増減
されるので、起動時における蒸発器の状態に適した圧縮
機の回転数制御が可能となる。According to the present invention, the temperatures of the refrigerant pipe outlet side and the intermediate portion of the evaporator are detected, and the degree of superheat of the evaporator is detected from the temperature difference. Until the number of revolutions of the compressor starts to reach the number of revolutions determined by the temperature difference between the set temperature and room temperature, the rotational acceleration is increased or decreased according to the degree of superheat. It is possible to control the rotation speed of the compressor suitable for the condition of the compressor.
【０００７】[0007]
【実施例】以下、本発明による空気調和機の一実施例に
ついて添付の図面を参照して説明する。図１は、本実施
例による空気調和機の冷凍サイクルを表した模式図であ
る。圧縮機１の吐出側に接続される凝縮機２は膨張弁３
を介して蒸発器４に接続され、この蒸発器４の出口側が
圧縮機１の吸い込み側に接続されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an air conditioner according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic diagram showing a refrigeration cycle of an air conditioner according to this embodiment. The condenser 2 connected to the discharge side of the compressor 1 has an expansion valve 3
Is connected to the evaporator 4 via the, and the outlet side of the evaporator 4 is connected to the suction side of the compressor 1.
【０００８】圧縮機１は、インバータ（図示せず）の周
波数の変化により回転数が変化する圧縮機で、全般の動
作は制御部５により制御されるようになっている。The compressor 1 is a compressor whose rotational speed changes with a change in frequency of an inverter (not shown), and the overall operation is controlled by the controller 5.
【０００９】この制御部５には、蒸発器４の冷媒配管出
口側の温度Ｔｅを検出する第１温度センサ６および蒸発
器４の冷媒配管中間部分に取り付けられてこの部分の温
度Ｔｃを検出する第２温度センサ７および室内機の空気
吸い込み口に配置されて室内温度を検出する室温センサ
８とが接続されるとともに、操作盤などに組込まれた温
度設定器９からの設定信号を受信するようになってい
る。このような制御部５は、図２に示す流れ図のプログ
ラムに従って動作し、室温Ｔａと設定温度Ｔｒとの差に
応じて圧縮機１の目標回転数Ｎ１を決定するとともに、
第１温度センサ６、第２温度センサによって検出した検
出温度差に基づいて蒸発器４の過熱度を検出し、圧縮機
１の回転数が目標回転数Ｎ１に移行するまで加速度を蒸
発器４の過熱度に応じた値に増減する制御を実行する。The control unit 5 is attached to a first temperature sensor 6 for detecting the temperature Te on the refrigerant pipe outlet side of the evaporator 4 and an intermediate portion of the refrigerant pipe of the evaporator 4 for detecting the temperature Tc of this portion. The second temperature sensor 7 and the room temperature sensor 8 arranged at the air inlet of the indoor unit for detecting the indoor temperature are connected, and the setting signal from the temperature setting device 9 incorporated in the operation panel or the like is received. It has become. Such a control unit 5 operates according to the program of the flow chart shown in FIG. 2, determines the target rotation speed N 1 of the compressor 1 according to the difference between the room temperature Ta and the set temperature Tr, and
The superheat degree of the evaporator 4 is detected based on the detected temperature difference detected by the first temperature sensor 6 and the second temperature sensor, and the acceleration is increased until the rotation speed of the compressor 1 shifts to the target rotation speed N 1. The control is executed to increase or decrease the value according to the degree of superheat of.
【００１０】ここで、図３は、圧縮機１の目標回転数Ｎ
１を決定する手法を説明するグラフで、温度設定器９を
介して設定した設定温度Ｔｒと室温センサ８によって検
出した室温Ｔａとの温度差ΔＴａの大きさならびにその
正負に応じて回転数を設定するようにしている。この実
施例では、設定温度Ｔｒと室温Ｔａとの温度差が等しい
とき （ΔＴａ＝０）の場合に予め決まっている回転数
を基準として、温度差ΔＴａの値に応じて段階的に回転
数を増減させている。例えば、設定温度Ｔｒと室温Ｔａ
との温度差ΔＴａが＋１度と＋２度の間にあるときに
は、基準回転数に対応する周波数よりも＋２だけ大きな
周波数に設定することで、目標回転数Ｎ１を基準回転数
よりも大きな回転数に修正している。Here, FIG. 3 shows the target rotational speed N of the compressor 1.
In the graph for explaining the method for determining 1 , the number of revolutions is set according to the magnitude of the temperature difference ΔTa between the set temperature Tr set via the temperature setter 9 and the room temperature Ta detected by the room temperature sensor 8 and its sign. I am trying to do it. In this embodiment, when the temperature difference between the set temperature Tr and the room temperature Ta is equal (ΔTa = 0), the rotation speed determined in advance is used as a reference, and the rotation speed is changed stepwise according to the value of the temperature difference ΔTa. It is increasing or decreasing. For example, the set temperature Tr and the room temperature Ta
When the temperature difference ΔTa between and is between +1 degree and +2 degrees, by setting the frequency by +2 higher than the frequency corresponding to the reference rotation speed, the target rotation speed N 1 is higher than the reference rotation speed. Has been fixed.
【００１１】次に、図４は、本実施例における圧縮機１
の回転加速度の設定についてのグラフである。図中、Δ
Ｔは第２温度センサ７による蒸発器４の冷媒配管中間部
分の検出温度Ｔｃと第１温度センサ６による冷媒配管出
口側の検出温度Ｔｅとの検出温度差であり、この検出温
度差ΔＴの値に応じて予め加速度について三段階のゾー
ンを設定している。ここでは、蒸発器４の容量等の条件
により定まる検出温度差ΔＴの所定の値ｄと、両検出温
度Ｔｃ、Ｔｅが等しい場合（ΔＴ＝０）とを境界として
ゾーンＩ、II、III を設定している。そして、どのゾー
ンに検出温度差ΔＴがあるかによって、蒸発器４の過熱
度を求め、この過熱度に応じて加速度を増減するように
なっている。すなわち、ゾーンＩに検出温度差ΔＴがあ
るときは、蒸発器４の過熱度が低い場合で圧縮機１の回
転加速度を初期設定加速度αからこれよりも大きい所定
の値に設定し直し、ゾーンIIに検出温度差ΔＴがあると
きは蒸発器の過熱度が高い場合であって、逆に圧縮機１
の回転加速度を初期設定加速度αよりも小さい値に設定
する。なお、検出温度差ΔＴがゾーンIII に入っている
場合は、初期設定加速度αを維持するようにしている。Next, FIG. 4 shows the compressor 1 in this embodiment.
5 is a graph for setting the rotational acceleration of the. In the figure, Δ
T is the temperature difference between the temperature Tc detected by the second temperature sensor 7 in the middle portion of the refrigerant pipe of the evaporator 4 and the temperature Te detected by the first temperature sensor 6 on the refrigerant pipe outlet side, and the value of the detected temperature difference ΔT. According to the above, three zones of acceleration are set in advance. Here, zones I, II, and III are set with the predetermined value d of the detected temperature difference ΔT determined by the conditions such as the capacity of the evaporator 4 and the case where both detected temperatures Tc and Te are equal (ΔT = 0) as boundaries. is doing. Then, the degree of superheat of the evaporator 4 is obtained depending on which zone has the detected temperature difference ΔT, and the acceleration is increased or decreased according to the degree of superheat. That is, when the detected temperature difference ΔT exists in the zone I, the rotational acceleration of the compressor 1 is reset from the initial set acceleration α to a predetermined value larger than this when the superheat degree of the evaporator 4 is low, and the zone II is set. When there is a detected temperature difference ΔT in the case where the degree of superheat of the evaporator is high, conversely, the compressor 1
The rotational acceleration of is set to a value smaller than the initial setting acceleration α. When the detected temperature difference ΔT is in the zone III, the initial acceleration α is maintained.
【００１２】以下、図２のフローチャートを参照して、
制御部５の動作について説明する。Below, referring to the flow chart of FIG.
The operation of the control unit 5 will be described.
【００１３】まず、制御部５は、温度設定器９から送信
される設定温度Ｔｒを受信するとともに（ステップＳ
１）、吸い込み口の室温センサ８の出力に基づき室温Ｔ
ａを検出する（ステップＳ２）。次に、この設定温度Ｔ
ｒと室温Ｔａとの温度差ΔＴａ＝Ｔｒ−Ｔａを算出し、
上述した図３に基づき温度差ΔＴａに応じて目標回転数
Ｎ１を決定する（ステップＳ３）。First, the control unit 5 receives the set temperature Tr transmitted from the temperature setter 9 (step S
1) Based on the output of the room temperature sensor 8 at the suction port, the room temperature T
a is detected (step S2). Next, this set temperature T
The temperature difference ΔTa = Tr−Ta between r and room temperature Ta is calculated,
Based on FIG. 3 described above, the target rotation speed N 1 is determined according to the temperature difference ΔTa (step S3).
【００１４】圧縮機１を起動する信号を送信して加速を
開始すると（ステップＳ４）、まず、回転数Ｎがステッ
プＳ３で決定した目標回転数Ｎ１に達したかどうかを判
断する。 起動当初は回転数は目標回転数まで達してい
ないので、次いで、第２温度センサ７の出力から蒸発器
４の冷媒配管中間部分の温度Ｔｃと、第１温度センサ６
の出力から蒸発器４の冷媒配管出口側の温度Ｔｅを検出
し（ステップＳ６，ステップＳ７）、上述した図４のど
のゾーンに検出温度差ΔＴがあるか、つまり蒸発器４の
過熱度によって、圧縮機１の加速度を初期設定加速度α
から増加（ステップＳ９）、減少（ステップＳ１０）あ
るいは維持する（ステップＳ１１）。When a signal for activating the compressor 1 is transmitted to start acceleration (step S4), first, it is determined whether or not the rotation speed N has reached the target rotation speed N1 determined in step S3. Since the number of revolutions does not reach the target number of revolutions at the beginning of startup, the output of the second temperature sensor 7 is then used to determine the temperature Tc of the middle portion of the refrigerant pipe of the evaporator 4 and the first temperature sensor 6.
The temperature Te on the outlet side of the refrigerant pipe of the evaporator 4 is detected from the output (step S6, step S7), and in which zone in FIG. 4 the detected temperature difference ΔT exists, that is, depending on the degree of superheat of the evaporator 4, The acceleration of the compressor 1 is set to the initial acceleration α
From (step S9), decrease (step S10) or maintain (step S11).
【００１５】その後は、ステップＳ４に戻って、圧縮機
１の回転数が実際に目標回転数Ｎ１になるまで以上の制
御を継続する。After that, returning to step S4, the above control is continued until the rotation speed of the compressor 1 actually reaches the target rotation speed N 1 .
【００１６】このように、蒸発器４の冷媒配管中間部分
の温度Ｔｃと出口側の温度Ｔｅとの検出温度差ΔＴ、す
なわち過熱度に応じて、目標回転数Ｎ１に移行するまで
の加速度を増加させたり、減少させたりしているので、
例えば、圧縮機起動時における蒸発器４の状態がその冷
媒配管の中間部分の温度が高く、逆に出口側の温度が低
く、つまり蒸発器４の過熱度が低い場合には、検出温度
差ΔＴはゾーンＩに該当する。この場合は、所定の割合
で加速度αを増加させて目標回転数Ｎ１まで圧縮機の回
転数を上げていくことになる。そして、過熱度が低い状
態に蒸発器４がある場合には、以上のような回転数制御
を行なっても騒音の発生などの問題は生じない。As described above, the acceleration until the target rotational speed N 1 is reached according to the detected temperature difference ΔT between the temperature Tc of the refrigerant pipe intermediate portion of the evaporator 4 and the outlet side temperature Te, that is, the degree of superheat. I'm increasing or decreasing it,
For example, when the temperature of the middle portion of the refrigerant pipe of the evaporator 4 at the time of starting the compressor is high and the temperature on the outlet side is low, that is, when the degree of superheat of the evaporator 4 is low, the detected temperature difference ΔT Corresponds to zone I. In this case, the acceleration α is increased at a predetermined rate to increase the rotation speed of the compressor to the target rotation speed N1. When the evaporator 4 is in a state where the degree of superheat is low, the problem such as the generation of noise does not occur even if the above rotation speed control is performed.
【００１７】一方、これとは逆に、蒸発器４の状態が冷
媒配管の中間部分の温度Ｔｃが低く、出口側の温度Ｔｅ
が高いような過熱度が高い状態にある場合には、検出温
度差ΔＴは、図４におけるゾーンIIに入っているので、
ステップＳ８からステップＳ１０に進んで、加速度αを
下げて圧縮機１を運転する。従って、蒸発器４が過熱状
態の高いままで急激に圧縮機１の回転を上げるような操
作にならないので、蒸発機４の内部の混相流による騒音
発生を防止することができる。On the other hand, conversely, in the state of the evaporator 4, the temperature Tc of the middle portion of the refrigerant pipe is low, and the temperature Te on the outlet side is Te.
When the superheat degree is high such that the temperature difference is high, the detected temperature difference ΔT is in the zone II in FIG.
From step S8 to step S10, the acceleration α is reduced and the compressor 1 is operated. Therefore, since the operation of rapidly increasing the rotation of the compressor 1 while the evaporator 4 is still in a high overheated state is not performed, noise generation due to the multiphase flow inside the evaporator 4 can be prevented.
【００１８】[0018]
【発明の効果】以上の説明から明らかなように、本発明
によれば、蒸発器の冷媒配管の出口側および中間部の温
度を検出するとともに、その検出温度差に基づいて蒸発
器の過熱度を検出し、この過熱度に応じて設定温度と検
出室温との温度差から決定された回転数に移行するまで
の加速度を増減する制御を行なうので、圧縮機起動時に
おける蒸発器の状態に適した回転数制御が可能となり、
冷暖房開始直後の混相流に起因する騒音を低減して静粛
な運転をすることができる。As is apparent from the above description, according to the present invention, the temperature of the outlet side and the intermediate portion of the refrigerant pipe of the evaporator is detected, and the degree of superheat of the evaporator is detected based on the detected temperature difference. Is detected, and the acceleration and deceleration until the number of revolutions is changed from the temperature difference between the set temperature and the detected room temperature is controlled according to this superheat, so it is suitable for the state of the evaporator when the compressor is started. It is possible to control the number of revolutions
It is possible to reduce noise caused by the multiphase flow immediately after the start of cooling and heating, and to perform quiet operation.
【図１】本発明による空気調和機の一実施例の冷凍サイ
クルを示すブロック図。FIG. 1 is a block diagram showing a refrigeration cycle of an embodiment of an air conditioner according to the present invention.
【図２】本実施例における制御部の動作を表したフロー
チャート。FIG. 2 is a flowchart showing the operation of the control unit in this embodiment.
【図３】設定温度と室温との差から圧縮機の目標回転数
を決定する手順の説明に供するグラフ。FIG. 3 is a graph used to explain a procedure for determining a target rotation speed of a compressor based on a difference between a set temperature and a room temperature.
【図４】蒸発器の冷媒配管出口側温度と中間部分の温度
差から圧縮機の回転加速度を決定する手順の説明に供す
るグラフ。FIG. 4 is a graph used for explaining a procedure for determining the rotational acceleration of the compressor from the temperature difference between the refrigerant pipe outlet side of the evaporator and the temperature of the intermediate portion.
１ 圧縮機 ２ 凝縮器 ３ 膨張弁 ４ 蒸発器 ５ 制御部 ６ 蒸発器の冷媒配管出口側の温度を検出する温度セン
サ ７ 蒸発器の冷媒配管中間部分の温度を検出する温度セ
ンサ ８ 室温センサ ９ 温度設定器1 Compressor 2 Condenser 3 Expansion valve 4 Evaporator 5 Control part 6 Temperature sensor which detects the temperature of the refrigerant piping outlet side of the evaporator 7 Temperature sensor which detects the temperature of the refrigerant piping middle part of the evaporator 8 Room temperature sensor 9 Temperature Setting device
Claims (1)
検出された室温と、設定温度との差に応じて圧縮機の回
転数を決定し、圧縮機の回転を制御するようにした空気
調和機において、蒸発器の冷媒配管出口側の温度を検出
する第１の温度検出器と、前記蒸発器の冷媒配管中間部
分の温度を検出する第２の温度検出器と、前記第２の温
度検出器と第１の温度検出器との検出温度差に基づいて
検出された過熱度に応じて、前記決定された圧縮器の回
転数へ移行する加速度を増減制御するようにした制御部
を備えたことを特徴とする空気調和機。1. A rotation speed of a compressor is determined according to a difference between an indoor temperature detector, a room temperature detected by the indoor temperature detector, and a set temperature, and the rotation of the compressor is controlled. In the air conditioner, a first temperature detector that detects the temperature of the refrigerant pipe outlet side of the evaporator, a second temperature detector that detects the temperature of the refrigerant pipe intermediate portion of the evaporator, and the second temperature detector. According to the degree of superheat detected based on the detected temperature difference between the temperature detector and the first temperature detector, a control unit configured to increase / decrease the acceleration that shifts to the determined rotational speed of the compressor. An air conditioner characterized by being equipped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4184174A JPH0626713A (en) | 1992-07-10 | 1992-07-10 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4184174A JPH0626713A (en) | 1992-07-10 | 1992-07-10 | Air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0626713A true JPH0626713A (en) | 1994-02-04 |
Family
ID=16148662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4184174A Pending JPH0626713A (en) | 1992-07-10 | 1992-07-10 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0626713A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2458305A1 (en) * | 2009-07-22 | 2012-05-30 | Mitsubishi Electric Corporation | Heat pump device |
| CN113970160A (en) * | 2021-11-01 | 2022-01-25 | 珠海格力电器股份有限公司 | Method and device for reducing noise of air conditioner and air conditioner |
-
1992
- 1992-07-10 JP JP4184174A patent/JPH0626713A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2458305A1 (en) * | 2009-07-22 | 2012-05-30 | Mitsubishi Electric Corporation | Heat pump device |
| EP2458305A4 (en) * | 2009-07-22 | 2014-06-25 | Mitsubishi Electric Corp | Heat pump device |
| US9557085B2 (en) | 2009-07-22 | 2017-01-31 | Mitsubishi Electric Corporation | Heat pump apparatus |
| CN113970160A (en) * | 2021-11-01 | 2022-01-25 | 珠海格力电器股份有限公司 | Method and device for reducing noise of air conditioner and air conditioner |
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