JPH0367965A - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JPH0367965A JPH0367965A JP1203091A JP20309189A JPH0367965A JP H0367965 A JPH0367965 A JP H0367965A JP 1203091 A JP1203091 A JP 1203091A JP 20309189 A JP20309189 A JP 20309189A JP H0367965 A JPH0367965 A JP H0367965A
- Authority
- JP
- Japan
- Prior art keywords
- compressor
- time
- frequency
- detection signal
- output
- 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 32
- 238000001514 detection method Methods 0.000 claims description 23
- 239000003638 chemical reducing agent Substances 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 abstract description 18
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 238000004804 winding Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract 1
- 238000001816 cooling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
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
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Air Conditioning Control Device (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明はインバータにより運転周波数を変化させ圧縮
機の容量制御を行う空気調和機において圧縮機の冷媒寝
込起動による損傷を防止する手段に関するものである。[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a means for preventing damage to the compressor due to refrigerant stagnation startup in an air conditioner that controls the capacity of the compressor by changing the operating frequency using an inverter. It is.
第３図は従来の空気調和機を示し、図において（１）は
圧縮機、（２）はアキュームレータ、（３）は四方切換
弁、（４）は窓列熱交換器、（５）は複数の室内熱交換
器％（６）は複数の減圧器、（７）は商用電源、（８）
は商用電源の電圧周波数を変えて圧縮機に供給するイン
バータ装置、（９）はインバータ駆動回路、００）は室
温設定器、０１）は各室内に設けられた室温センサー０
２）は室内機容量を設定する設定器、０３）は室温設定
器（１０）で設定された設定温度と、室温センサー（１
１）より出力される温度検出信号から算出される室内負
荷に見合った周波数を決定する室内負荷対応出力周波数
決定手段、０４）は室内機容量設定器０２）からの出力
に基き最高出力周波数を決定する手段、０５）は上記室
内負荷相当の周波数決定手段（１３）と、室内機容量に
基く最高出力周波数決定手段０４）から出力される周波
数を演算、実際の運転周波数を決定する手段、０８）は
クランクケースヒータ駆動回路、Ｑ９１はクランクケー
スヒータ、＠）は運転スイッチ、（２１＋は電源スィッ
チである。Figure 3 shows a conventional air conditioner, in which (1) is a compressor, (2) is an accumulator, (3) is a four-way switching valve, (4) is a window row heat exchanger, and (5) is a plurality of indoor heat exchanger% (6) is multiple pressure reducers, (7) is commercial power supply, (8)
(9) is an inverter drive circuit, (00) is a room temperature setting device, and (01) is a room temperature sensor installed in each room.
2) is a setting device that sets the capacity of the indoor unit, and 03) is a setting device that sets the temperature set by the room temperature setting device (10) and a room temperature sensor (1).
1) Indoor load compatible output frequency determining means that determines a frequency suitable for the indoor load calculated from the temperature detection signal output from 04) determines the maximum output frequency based on the output from the indoor unit capacity setting device 02) 05) means for determining the actual operating frequency by calculating the frequency output from the frequency determining means (13) corresponding to the indoor load and the maximum output frequency determining means 04) based on the capacity of the indoor unit; 08) is the crankcase heater drive circuit, Q91 is the crankcase heater, @) is the operation switch, and (21+ is the power switch).
次に動作について説明する。Next, the operation will be explained.
運転スイッチ（２０）が切のとき、電源スィッチ（２１
）を入れると、クランクケースヒータ駆動回路０８）に
よリフランクケースヒータ（１９１に通電され、圧縮機
（１）内部の温度を上昇させ冷媒液の寝込みを防止する
。When the operation switch (20) is off, the power switch (21)
), the crankcase heater drive circuit 08) energizes the reflux case heater (191) to increase the temperature inside the compressor (1) and prevent the refrigerant liquid from stagnation.
次に運転スイッチ＠）を入れると、クランクケースヒー
タ駆動回路０８）により、クランクケースヒータ（１９
）への通電を停止する。あわせて室温設定器００）で設
定された設定温度と室温センサー０１）より出力される
温度検出信号から室内負荷に見合った周波数を室内負荷
対応出力周波数決定手段（１３１により決定、更に室内
機容量設定器０２）からの出力に基き最高出力周波数を
最高出力周波数決定手段０４）により決定、最終的に実
際の運転周波数を運転周波数決定手段ｕ９により決めイ
ンバータ駆動回路（９）により所定の周波数と電圧が圧
縮機（１）に供給されるようにインバータ装置（８）が
駆動される。上記のように圧縮機（１）へ所定の周波数
及び電圧が供給され圧縮機が起動する。冷房運転の場合
、圧縮機（１）でガス冷媒を圧縮し、吐出された高温高
圧のガス冷媒は四方切換弁（３）を介して室外熱交換器
（４）に流入し、室外空気に放熱する一方冷媒は凝縮し
て高圧の液冷媒となり、減圧器（６）で減圧され低圧の
気液混合冷媒となって、室内熱交換器（５）に供給され
る。室内熱交換器（５）では、室内空気から採熱して冷
房する一方、冷媒は蒸発して低圧のガス冷媒となり、四
方切換弁（３）を介してアキュムレータ（２）に流入す
る。アキュムレータ（２）では、室内熱交換器（５）で
蒸発し切れなかった液冷媒とガス冷媒を分離して圧縮機
ｆｌ）に吸入させる。Next, when the operation switch @) is turned on, the crankcase heater drive circuit 08) starts the crankcase heater (19).
). In addition, the indoor load compatible output frequency determining means (131) determines a frequency suitable for the indoor load from the set temperature set by the room temperature setting device 00) and the temperature detection signal output from the room temperature sensor 01), and further sets the indoor unit capacity. The maximum output frequency is determined by the maximum output frequency determining means 04) based on the output from the inverter drive circuit (9), and the actual operating frequency is finally determined by the operating frequency determining means u9. The inverter device (8) is driven to supply the compressor (1). As described above, a predetermined frequency and voltage are supplied to the compressor (1) and the compressor is started. In the case of cooling operation, the compressor (1) compresses the gas refrigerant, and the discharged high-temperature, high-pressure gas refrigerant flows into the outdoor heat exchanger (4) via the four-way switching valve (3), and radiates heat to the outdoor air. Meanwhile, the refrigerant is condensed to become a high-pressure liquid refrigerant, and the pressure is reduced by the pressure reducer (6) to become a low-pressure gas-liquid mixed refrigerant, which is then supplied to the indoor heat exchanger (5). The indoor heat exchanger (5) collects heat from the indoor air for cooling, while the refrigerant evaporates to become a low-pressure gas refrigerant, which flows into the accumulator (2) via the four-way switching valve (3). In the accumulator (2), the liquid refrigerant and gas refrigerant that have not been completely evaporated in the indoor heat exchanger (5) are separated and are sucked into the compressor fl).
次に、暖房運転時の動作について説明する。圧縮機（１
）でガス冷媒を圧縮し、吐出された高温高圧のガス冷媒
は、四方切換弁（３）を介して室内熱交換器（５）に供
給され、室内空気に放熱して暖房する一方、冷媒は凝縮
して高圧の液冷媒となる。この液冷媒は、減圧装置（６
）に流入して減圧され、低圧の気液混合冷媒となって室
外熱交換器（４）に供給され、室外空気より採熱して、
低圧のガス冷媒となって、四方切換弁（３）を介してア
キュムレータ（２）に流入する。アキュムレータ（２）
では冷房運転時と同様に、ガス冷媒と液冷媒を分離する
。Next, the operation during heating operation will be explained. Compressor (1
), and the discharged high-temperature, high-pressure gas refrigerant is supplied to the indoor heat exchanger (5) via the four-way switching valve (3), where it radiates heat to indoor air and heats it. It condenses to become a high-pressure liquid refrigerant. This liquid refrigerant is transferred to a pressure reducing device (6
), it is depressurized, becomes a low-pressure gas-liquid mixed refrigerant, and is supplied to the outdoor heat exchanger (4), where it collects heat from the outdoor air.
It becomes a low-pressure gas refrigerant and flows into the accumulator (2) via the four-way switching valve (3). Accumulator (2)
In this case, the gas refrigerant and liquid refrigerant are separated as in the case of cooling operation.
従来の分離型空気調和機は、以上のように構成されてい
たので、空気調和機の電源が入ってないときはクランク
ケースヒータには通電されず、従って液圧縮による圧縮
機の損傷を防ぐためには、起動の数時間以前に電源を入
れることが必要である。しかし、現実には数時間前の電
源投入が守られず、圧縮機を損傷するケースがかなりみ
られるという問題があった。Conventional separate air conditioners were configured as described above, so when the air conditioner is not powered on, the crankcase heater is not energized, so in order to prevent damage to the compressor due to liquid compression. It is necessary to turn on the power several hours before startup. However, in reality, there was a problem in that there were many cases in which the power was not turned on several hours in advance, causing damage to the compressor.
この発明は上記のような問題を解消するためになされた
もので、クランクケースヒータへの通電時間が所定の時
間に満たないとき、即ち冷媒寝込状態で運転スイッチを
入れた場合、自動的に圧縮機の始動を禁止し、所定時間
圧縮機に始動しない程度の電圧周波数の電源を供給し、
圧縮機内部を加熱して冷媒の寝込状態を解消した後に、
電圧周波数を上昇させ始動させるようにしたものであり
、安価にできるとともに数時間前の電源投入が守られな
くても冷媒寝込状態での圧縮機の液圧縮事故を皆無にで
きる空気調和機を得ることを目的とする。This invention was made in order to solve the above-mentioned problem, and when the power supply time to the crankcase heater is less than a predetermined time, that is, when the operation switch is turned on while the refrigerant is asleep, the Prohibiting the compressor from starting, supplying power with a voltage and frequency that does not allow the compressor to start for a predetermined period of time,
After heating the inside of the compressor and eliminating the refrigerant stagnation,
This air conditioner is designed to start by increasing the voltage frequency, and is inexpensive and can eliminate liquid compression accidents in the compressor due to refrigerant stagnation even if the power is not turned on several hours in advance. The purpose is to obtain.
この発明においては、圧縮機、切換弁、室外熱交換器、
減圧器、及び室内熱交換器等により構成された冷媒回路
と、上記圧縮機用モータに供給する電圧並びにその周波
数を変化させるインバータ装置と、上記圧縮機に取付け
られ、上記圧縮機を加熱するクランクケースヒータと、
オンすることにより上記インバータ装置を介して上記圧
縮機モータに通電し、オフすることにより上記りランク
ケースヒータに通電する運転スイッチと、外気温度を検
出し、上記外気温度に応じた温度検出信号を出力する外
気温センサーと、上記クランクケースヒータへの通電時
間を計時し、この通電時間に応じ第１の時間検出信号を
出力すると共に、上記運転スイットオン後の上記圧縮機
モータへの通電時間を計時し、この通電時間に応じ、第
２の時間検出信号を出力する計時手段、及び運転スイッ
チをオンしたとき、外気温度が一定温度以下であり、カ
ッ上記クランクケースヒータへの通電時間が所定時間未
満のとき、上記外気温センサーからの温度検出信号並び
に上記計時手段からの第１の時間検出信号に基づき、上
記インバータ装置の出力周波数並びに出力電圧をそれぞ
れ所定値以下とすると共に、この所定値以下の周波数並
びに電圧を出力している時間が所定時間に達したとき、
上記計時手段からの第２の時間検出信号に基づき上記出
力周波数並びに出力電圧を所定値以上に上昇させ、上記
圧縮機を始動させる運転周波数決定手段とを設けたこと
により空気調和機を構成して上記目的を達成するもので
ある。In this invention, a compressor, a switching valve, an outdoor heat exchanger,
A refrigerant circuit composed of a pressure reducer, an indoor heat exchanger, etc., an inverter device that changes the voltage and frequency supplied to the compressor motor, and a crank that is attached to the compressor and heats the compressor. case heater,
An operating switch that energizes the compressor motor via the inverter device when turned on, and energizes the rank case heater when turned off, detects outside air temperature, and outputs a temperature detection signal according to the outside air temperature. The outside air temperature sensor outputs a time and the time for which electricity is applied to the crankcase heater is outputted, and a first time detection signal is output according to this energization time, and the time during which electricity is applied to the compressor motor after the operation switch is turned on is measured. A timer means outputs a second time detection signal according to the energization time, and when the operation switch is turned on, the outside temperature is below a certain temperature and the energization time to the crankcase heater above is less than the predetermined time. At this time, based on the temperature detection signal from the outside air temperature sensor and the first time detection signal from the time measurement means, the output frequency and output voltage of the inverter device are respectively set to below predetermined values, and the output frequency and output voltage are set below the predetermined values. When the time of outputting frequency and voltage reaches a predetermined time,
and operating frequency determining means for increasing the output frequency and output voltage to a predetermined value or more based on a second time detection signal from the time measuring means and starting the compressor, thereby configuring the air conditioner. This aims to achieve the above objectives.
この発明では所定時間以上のクランクケースヒータへの
通電が確保されなく外気温度が一定値以下である状態で
運転スイッチを入れても、インバータ装置から圧縮機用
電動機に供給される電圧・周波数は所定値以下となるの
で圧縮機は始動せず電動機巻線は発熱源となり、所定時
間内に圧縮機内の寝込液冷媒を気化させる。この液冷媒
が気化したことを計時手段により間接的に第２の時間検
出信号として検出し、上記第２の時間検出信号に基き、
インバータ装置から供給される電圧並びに周波数を所定
値以上に上昇させ、圧縮機を始動させる構成としたため
、圧縮機を損傷させることなく運転することができる。In this invention, even if the crankcase heater is not energized for a predetermined period of time or longer and the operation switch is turned on when the outside temperature is below a certain value, the voltage and frequency supplied from the inverter to the compressor motor will remain at the predetermined level. Since the value is below this value, the compressor does not start, and the motor winding becomes a heat source, causing the liquid refrigerant in the compressor to vaporize within a predetermined period of time. The fact that the liquid refrigerant has vaporized is indirectly detected as a second time detection signal by a timing means, and based on the second time detection signal,
Since the compressor is started by increasing the voltage and frequency supplied from the inverter device to a predetermined value or higher, the compressor can be operated without being damaged.
以下、この発明の一実施例を図について説明する。第１
図において、（１）は圧縮機、（２）はアキュームレー
タ、（３）は四方切換弁、（４）は室外熱交換器、（５
）は複数の室内熱交換器、（６）は複数の減圧器、（７
）は商用電源、（８）はインバータ装置、（９）はイン
バータ駆動回路、００）は室温設定器、０］）は各室内
に設けられた室温センサー、０２）は室内機容量設定器
、口３）は室温設定器００）で設定された設定温度と室
温センサー０１）より出力される温度検出信号から算出
される室内負荷に見合った周波数を決定する室内負荷対
応出力周波数決定手段、０引ま室内機容量設定器０２）
からの出力に基き最高出力周波数を決定する最高出力周
波数決定手段、［１６）は電源投入後のクランクケース
ヒータへの通電時間及び運転スイッチオン後の上記圧縮
機モータへの通電時間を計時する計時手段、叩は外気温
センサー、口５１は上記室内負荷相当の出力周波数決定
手段曲と室内機容量設定器０のからの出力に基く最高出
力周波数決定手段０４からの出力及び外気層ンサー（１
〃の検知温度により演算を行い、実際の運転周波数を決
定する運転周波数決定手段、０８）はクランクケースヒ
ータ駆動回路、０９）はクランクケースヒータ、＠）は
運転スイッチ、ｃ！１）は電源スィッチである。An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, (1) is a compressor, (2) is an accumulator, (3) is a four-way switching valve, (4) is an outdoor heat exchanger, and (5) is a four-way switching valve.
) is multiple indoor heat exchangers, (6) is multiple pressure reducers, (7
) is the commercial power supply, (8) is the inverter device, (9) is the inverter drive circuit, 00) is the room temperature setting device, 0]) is the room temperature sensor installed in each room, 02) is the indoor unit capacity setting device, 3) is an indoor load corresponding output frequency determining means that determines a frequency suitable for the indoor load calculated from the set temperature set by the room temperature setting device 00) and the temperature detection signal output from the room temperature sensor 01); Indoor unit capacity setting device 02)
[16] is a maximum output frequency determining means for determining the maximum output frequency based on the output from the power source, and [16] is a timer that measures the time for energizing the crankcase heater after the power is turned on and the time for energizing the compressor motor after the operation switch is turned on. The means, the tap, is an outside air temperature sensor, and the port 51 is an output from the output frequency determining means 04 corresponding to the indoor load and an output from the maximum output frequency determining means 04 based on the output from the indoor unit capacity setting device 0, and an outside air layer sensor (1).
08) is the crankcase heater drive circuit, 09) is the crankcase heater, @) is the operation switch, c! 1) is a power switch.
次に実施例の動作について説明する。第２図に本発明の
部分の制御状態のフローチャートを示す。Next, the operation of the embodiment will be explained. FIG. 2 shows a flowchart of the control state of the part of the present invention.
ステップ（２）で電源投入すると、ステップ（２３）で
クランクケースヒータに通電される。ステップ（財）で
運転スイッチを入れるとステップ（２）でクランクケー
スヒータへの通電が停止される。同時にステップ□□□
）＠で電源を投入してから第１の所定時間１７以内であ
り、かつ外気温度が一定温度ｔ２℃以下であれば圧縮機
が冷媒寝込状態にあると判断し、ステップ（支）で圧縮
機に起動しない程度に設定した所定値以下の周波数り、
Ｈｚと所定値以下の電圧シ、■をステップ（支）で第
２の所定時間１８分間供給し圧縮機用電動機巻線を加熱
することにより圧縮機内部から液冷媒を追い出し冷媒寝
込状態を解消する。そしてステップ印）で所定の起動に
必要な周波数ｈ２Ｈ２及び電圧ν２ｖが圧縮機に供給さ
れ運転を開始する。When the power is turned on in step (2), the crankcase heater is energized in step (23). When the operation switch is turned on in step (2), the power supply to the crankcase heater is stopped in step (2). Step at the same time □□□
) If the first predetermined time 17 has elapsed since the power was turned on with If the frequency is below a predetermined value set to prevent the machine from starting,
Hz and a voltage below a predetermined value, ■ is supplied in steps for a second predetermined time period of 18 minutes to heat the compressor motor winding, thereby expelling liquid refrigerant from inside the compressor and eliminating the refrigerant stagnation state. do. Then, at step mark), the frequency h2H2 and voltage ν2v necessary for a predetermined start-up are supplied to the compressor to start operation.
この発明による空気調和機においては、圧縮機、切換弁
、室外熱交換器、減圧器、及び室内熱交換器等により構
成された冷媒回路と、上記圧縮機用モータに供給する電
圧並びにその周波数を変化させるインバータ装置と、上
記圧縮機に取付けられ、上記圧縮機を加熱するクランク
ケースヒータと、オンすることにより上記インバータ装
置を介して上記圧縮機モータに通電し、オフすることに
より上記クランクケースヒータに通電する運転スイッチ
と、外気温度を検出し、上記外気温度に応じた温度検出
信号を出力する外気温センサー 上記クランクケースヒ
ータへの通電時間を計時し、この通電時間に応じ第１の
時間検出信号を出力すると共に、上記運転スイソチオン
後の上記圧縮機モータへの通電時間を計時し、この通電
時間に応じ、第２の時間検出信号を出力する計時手段、
及び運転スイッチをオンしたとき、外気温度が一定温度
以下であり、かつ上記クランクケースヒータへの通電時
間が所定時間未満のとき、上記外気温センサーからの温
度検出信号並びに上記計時手段からの第１の時間検出信
号に基づき、上記インバータ装置の出力周波数並びに出
力電圧をそれぞれ所定値以下とすると共に、この所定値
以下の周波数並びに電圧を出力している時間が所定時間
に達したとき、上記計時手段からの第２の時間検出信号
に基づき上記出力周波数並びに出力電圧を所定値以上に
上昇させ、上記圧縮機を始動させる運転周波数決定手段
とを設けたことにより、運転スイッチオン前に、所定時
間クランクケースヒータへの通電が行なわれておらず、
かつ外気温度が一定温度以下であり、圧縮機内に液冷媒
が寝込状態となっている場合でも液冷媒の寝込状態解消
後目動的に始動に入るので圧縮機に損傷を与えることな
くスムーズに運転が開始でき空気調和機の信頼性を大幅
に向上させることができた。The air conditioner according to the present invention has a refrigerant circuit composed of a compressor, a switching valve, an outdoor heat exchanger, a pressure reducer, an indoor heat exchanger, etc., and the voltage and frequency supplied to the compressor motor. an inverter device that heats the compressor; and a crankcase heater that is attached to the compressor and heats the compressor. an outside temperature sensor that detects the outside air temperature and outputs a temperature detection signal according to the outside temperature; and an outside temperature sensor that measures the time that the crankcase heater is energized, and detects the first time according to this energization time. a clock means for outputting a signal, and also for measuring the time during which the compressor motor is energized after the operation issuance, and outputting a second time detection signal in accordance with the energization time;
and when the operation switch is turned on, when the outside air temperature is below a certain temperature and the energization time to the crankcase heater is less than a predetermined time, the temperature detection signal from the outside temperature sensor and the first Based on the time detection signal, the output frequency and output voltage of the inverter device are respectively set to be below a predetermined value, and when the time period during which the frequency and voltage below the predetermined values have been outputted reaches a predetermined time, the time measurement means and operating frequency determining means for increasing the output frequency and output voltage to a predetermined value or higher based on a second time detection signal from the compressor, and starting the compressor. The case heater is not energized,
In addition, even if the outside air temperature is below a certain temperature and the liquid refrigerant is stagnant in the compressor, the system will start automatically after the liquid refrigerant is released from the stagnation state, so it will start smoothly without damaging the compressor. The reliability of the air conditioner has been significantly improved since it was able to start operation immediately.
第１図は、この発明の一実施例による空気調和機の全体
構成図、第２図は第１図に示す空気調和機の制御内容を
示すフローチャート、第３図は従来の空気調和機の全体
構成図である。
これらの図において、（１）は圧縮機、（３）は切換弁
、（４）は室外熱交換器、（５）は室内熱交換器、（６
）は減圧器、（８）はインバータ装置、０５）は運転周
波数決定手段、Ｏ旧ま計時手段、（１ヒは外気温センサ
ー、（１９）はクランクケースヒータ、ＣＯ）は運転ス
イッチである。
なお、各図中同一符号は同一、又は相当部分を示す。FIG. 1 is an overall configuration diagram of an air conditioner according to an embodiment of the present invention, FIG. 2 is a flowchart showing control details of the air conditioner shown in FIG. 1, and FIG. 3 is an overall diagram of a conventional air conditioner. FIG. In these figures, (1) is a compressor, (3) is a switching valve, (4) is an outdoor heat exchanger, (5) is an indoor heat exchanger, and (6) is an outdoor heat exchanger.
) is a pressure reducer, (8) is an inverter device, 05) is an operating frequency determining means, O is a clocking means, (1 is an outside temperature sensor, (19) is a crankcase heater, and CO) is an operation switch. Note that the same reference numerals in each figure indicate the same or equivalent parts.
Claims (1)
器等により構成された冷媒回路、上記圧縮機用モータに
供給する電圧並びにその周波数を変化させるインバータ
装置、上記圧縮機に取付けられ、上記圧縮機を加熱する
クランクケースヒータ、オンすることにより上記インバ
ータ装置を介して上記圧縮機モータに通電し、オフする
ことにより上記クランクケースヒータに通電する運転ス
イッチ、外気温度を検出し、上記外気温度に応じた温度
検出信号を出力する外気温センサー、上記クランクケー
スヒータへの通電時間を計時し、この通電時間に応じ第
１の時間検出信号を出力すると共に、上記運転スイッチ
オン後の上記圧縮機モータへの通電時間を計時し、この
通電時間に応じ、第２の時間検出信号を出力する計時手
段、及び運転スイッチをオンしたとき、外気温度が一定
温度以下であり、かつ上記クランクケースヒータへの通
電時間が所定時間未満のとき、上記外気温センサーから
の温度検出信号並びに上記計時手段からの第１の時間検
出信号に基づき、上記インバータ装置の出力周波数並び
に出力電圧をそれぞれ所定値以下とすると共に、この所
定値以下の周波数並びに電圧を出力している時間が所定
時間に達したとき、上記計時手段からの第２の時間検出
信号に基づき上記出力周波数並びに出力電圧を所定値以
上に上昇させ、上記圧縮機を始動させる運転周波数決定
手段を備えたことを特徴とする空気調和機。A refrigerant circuit consisting of a compressor, a switching valve, an outdoor heat exchanger, a pressure reducer, an indoor heat exchanger, etc., an inverter device that changes the voltage and frequency supplied to the compressor motor, and is attached to the compressor. a crankcase heater that heats the compressor; an operation switch that energizes the compressor motor via the inverter device when turned on and energizes the crankcase heater when turned off; detects outside air temperature; An outside temperature sensor outputs a temperature detection signal according to the outside temperature, measures the time during which the crankcase heater is energized, outputs a first time detection signal according to the energization time, and outputs a first time detection signal after the operation switch is turned on. a timer that measures the time during which the compressor motor is energized and outputs a second time detection signal according to the energization time; and when the operation switch is turned on, the outside air temperature is below a certain temperature, and When the energization time to the case heater is less than a predetermined time, the output frequency and output voltage of the inverter device are set to predetermined values, respectively, based on the temperature detection signal from the outside temperature sensor and the first time detection signal from the time measurement means. and when the time during which the frequency and voltage below the predetermined value are output reaches a predetermined time, the output frequency and output voltage are set to be above the predetermined value based on the second time detection signal from the clocking means. An air conditioner characterized in that the air conditioner is equipped with an operating frequency determining means for starting the compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1203091A JPH0367965A (en) | 1989-08-05 | 1989-08-05 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1203091A JPH0367965A (en) | 1989-08-05 | 1989-08-05 | Air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0367965A true JPH0367965A (en) | 1991-03-22 |
Family
ID=16468223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1203091A Pending JPH0367965A (en) | 1989-08-05 | 1989-08-05 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0367965A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005214609A (en) * | 2004-01-29 | 2005-08-11 | Lg Electronics Inc | Stirling refrigerator |
| JP2009243846A (en) * | 2008-03-31 | 2009-10-22 | Mitsubishi Heavy Ind Ltd | Air conditioner |
| JP2012247182A (en) * | 2012-08-13 | 2012-12-13 | Mitsubishi Heavy Ind Ltd | Air conditioner |
| WO2013088585A1 (en) * | 2011-12-13 | 2013-06-20 | パナソニック株式会社 | Clothes dryer |
| CN111059727A (en) * | 2019-12-06 | 2020-04-24 | 徐州顺风阀门有限公司 | Frequency control method for air conditioner compressor |
-
1989
- 1989-08-05 JP JP1203091A patent/JPH0367965A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005214609A (en) * | 2004-01-29 | 2005-08-11 | Lg Electronics Inc | Stirling refrigerator |
| JP2009243846A (en) * | 2008-03-31 | 2009-10-22 | Mitsubishi Heavy Ind Ltd | Air conditioner |
| WO2013088585A1 (en) * | 2011-12-13 | 2013-06-20 | パナソニック株式会社 | Clothes dryer |
| CN103958765A (en) * | 2011-12-13 | 2014-07-30 | 松下电器产业株式会社 | Clothes dryer |
| EP2792785A4 (en) * | 2011-12-13 | 2015-04-29 | Panasonic Corp | Clothes dryer |
| JP2012247182A (en) * | 2012-08-13 | 2012-12-13 | Mitsubishi Heavy Ind Ltd | Air conditioner |
| CN111059727A (en) * | 2019-12-06 | 2020-04-24 | 徐州顺风阀门有限公司 | Frequency control method for air conditioner compressor |
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