JP7319115B2 - air conditioner - Google Patents

air conditioner Download PDF

Info

Publication number
JP7319115B2
JP7319115B2 JP2019127507A JP2019127507A JP7319115B2 JP 7319115 B2 JP7319115 B2 JP 7319115B2 JP 2019127507 A JP2019127507 A JP 2019127507A JP 2019127507 A JP2019127507 A JP 2019127507A JP 7319115 B2 JP7319115 B2 JP 7319115B2
Authority
JP
Japan
Prior art keywords
compressor
sequence
rotation speed
air conditioner
drive current
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.)
Active
Application number
JP2019127507A
Other languages
Japanese (ja)
Other versions
JP2021011995A (en
Inventor
雅治 渡辺
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sharp Corp filed Critical Sharp Corp
Priority to JP2019127507A priority Critical patent/JP7319115B2/en
Priority to CN202010634181.9A priority patent/CN112212482B/en
Publication of JP2021011995A publication Critical patent/JP2021011995A/en
Application granted granted Critical
Publication of JP7319115B2 publication Critical patent/JP7319115B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/08—Compressors specially adapted for separate outdoor units
    • F24F1/12—Vibration or noise prevention thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/88—Electrical aspects, e.g. circuits
    • 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
    • F25B13/00—Compression machines, plants or systems, with reversible cycle

Description

本発明は、空気調和機に関する。 The present invention relates to an air conditioner.

特許文献１には、空気調和機における圧縮機の起動を行うための圧縮機起動シーケンスが開示されている。特許文献１には、圧縮機の駆動モータの起動時における起動失敗が検出されると、起動電圧を所定電圧ずつ順次上昇させて再起動をかけることが開示されている。また、特許文献１の圧縮機起動シーケンスは、起動失敗が所定回数に達したときに、空気調和機を異常停止させるものとなっている。 Patent Literature 1 discloses a compressor start-up sequence for starting a compressor in an air conditioner. Japanese Patent Laid-Open No. 2004-100001 discloses that when a start-up failure is detected at the time of start-up of a drive motor for a compressor, the start-up voltage is sequentially increased by a predetermined voltage to restart the compressor. Further, the compressor start-up sequence of Patent Document 1 causes the air conditioner to abnormally stop when the start-up failure reaches a predetermined number of times.

特開平１０－２６７４３２号公報JP-A-10-267432

空気調和機における圧縮機起動シーケンスは、通常、起動時の振動や騒音を抑えながら圧縮機を起動させるものとされている一方、外気温が高く圧縮機の負荷が大きくなるような状況でも確実な起動を行うことも要求される。 Normally, the compressor start-up sequence in an air conditioner is supposed to start the compressor while suppressing vibration and noise at start-up. You are also asked to perform a boot.

特許文献１における圧縮機起動シーケンスは、何らかの原因で起動失敗が生じた場合に、起動失敗後の再起動時にモータの起動電圧を上昇させることで起動の確実性を上げるものとなっているが、圧縮機の負荷が大きい場合の起動失敗を想定しているものではない。また、本願発明者の検討によれば、特許文献１のようにモータの起動電圧を上昇させる方法は、圧縮機の負荷が大きい場合において、起動の確実性を上げるための最適な方法と言えるものではない。このため、特許文献１における圧縮機起動シーケンスでは、圧縮機起動にとってより過酷となる状況では、圧縮機の起動が行えないこともあり得る。 The compressor start-up sequence in Patent Document 1 increases the certainty of start-up by increasing the start-up voltage of the motor when restarting after the start-up failure when start-up failure occurs for some reason. It does not assume failure to start when the load on the compressor is large. Further, according to the study of the inventor of the present application, the method of increasing the starting voltage of the motor as in Patent Document 1 can be said to be the optimum method for increasing the certainty of starting when the load on the compressor is large. isn't it. For this reason, in the compressor start-up sequence in Patent Document 1, the compressor may not be started under conditions that are more severe for the compressor start-up.

例えば、外気温の高い状態で運転されていた空気調和機を一旦止めて再起動するような場合、すなわち、外気温と圧縮機温度とが共に高い状況では、圧縮機が異常な過負荷状態となり、空気調和機を再起動したときに保護動作が働いて圧縮機の起動が失敗しやすい。特許文献１の起動シーケンスでは、このような状況に対応できず、起動失敗を繰り返した後に空気調和機の運転が停止する恐れがある。 For example, when an air conditioner that has been operating at a high outside temperature is stopped and restarted, that is, in a situation where both the outside temperature and the compressor temperature are high, the compressor will be in an abnormal overload state. , when the air conditioner is restarted, the protective action is activated and the compressor tends to fail to start. The startup sequence of Patent Literature 1 cannot handle such a situation, and there is a risk that the operation of the air conditioner will stop after repeated startup failures.

本発明は、上記課題に鑑みてなされたものであり、外気温および圧縮機温度が共に高い状況でも圧縮機の確実な起動を行うことのできる空気調和機を提供することを目的とする。 SUMMARY OF THE INVENTION It is an object of the present invention to provide an air conditioner capable of reliably starting a compressor even when both the outside air temperature and the compressor temperature are high.

上記の課題を解決するために、本発明の空気調和機は、運転開始時に圧縮機が過負荷状態であるか否かを判定する判定部と、前記圧縮機の起動制御を行う制御部とを備え、前記制御部は、前記判定部によって前記圧縮機が過負荷状態でないと判定された場合には、起動時における振動および騒音の抑制効果が高い第１の起動シーケンスにて前記圧縮機を起動させ、前記判定部によって前記圧縮機が過負荷状態であると判定された場合には、過負荷状態においても前記圧縮機の確実な起動が行える第２の起動シーケンスにて前記圧縮機を起動させることを特徴としている。 In order to solve the above problems, the air conditioner of the present invention includes a determination unit that determines whether or not the compressor is in an overloaded state at the start of operation, and a control unit that performs start-up control of the compressor. When the determination unit determines that the compressor is not in an overloaded state, the control unit starts the compressor in a first start sequence that is highly effective in suppressing vibration and noise during start-up. and if the determination unit determines that the compressor is in an overloaded state, the compressor is started in a second start-up sequence that enables reliable start-up of the compressor even in the overloaded state. It is characterized by

上記の構成によれば、圧縮機が過負荷状態であると判定された場合には、圧縮機の確実な起動が行える第２の起動シーケンスにて圧縮機を起動させることで、圧縮機の起動失敗を防止し、確実な起動を行うことができる。 According to the above configuration, when it is determined that the compressor is in an overloaded state, the compressor is started by the second startup sequence that enables reliable startup of the compressor. Failure can be prevented and reliable start can be performed.

また、上記空気調和機では、前記第１および第２の起動シーケンスは、前記圧縮機のモータ駆動電流を起動途中で強制的に上昇させる期間を含んで、圧縮機回転数を所望の回転数まで上昇させる起動シーケンスであり、前記第２の起動シーケンスでは、前記モータ駆動電流を上昇させるタイミングが、前記第１の起動シーケンスよりも後ろにずらされている構成とすることができる。 Further, in the above air conditioner, the first and second startup sequences include a period during which the motor drive current of the compressor is forcibly increased during startup, and the compressor rotation speed is increased to a desired rotation speed. In the second startup sequence, the timing of increasing the motor drive current may be shifted later than in the first startup sequence.

上記の構成によれば、第２の起動シーケンスでは、モータ駆動電流を上昇させるタイミングが第１の起動シーケンスよりも後ろにずらされることで、駆動モータのロータに十分な回転惰性が働いた状態で駆動モータのロータを加速することができる。これにより、外気温および圧縮機温度が共に高いような過負荷状態でも、圧縮機の起動失敗を防止し、確実な起動を行うことができる。 According to the above configuration, in the second start-up sequence, the timing of increasing the motor drive current is shifted later than in the first start-up sequence. The rotor of the drive motor can be accelerated. As a result, even in an overloaded state where both the outside air temperature and the compressor temperature are high, it is possible to prevent the compressor from failing to start and to start it reliably.

また、上記空気調和機では、前記第１および第２の起動シーケンスは、前記圧縮機回転数が所定の圧縮機回転数に到達したタイミングで前記モータ駆動電流を上昇させる起動シーケンスであり、前記第２の起動シーケンスでは、前記所定の圧縮機回転数が、前記第１の起動シーケンスよりも大きな圧縮機回転数とされている構成とすることができる。 Further, in the above air conditioner, the first and second startup sequences are startup sequences for increasing the motor drive current at timing when the compressor rotational speed reaches a predetermined compressor rotational speed, and In the second startup sequence, the predetermined compressor rotation speed may be set to a higher compressor rotation speed than in the first startup sequence.

また、上記空気調和機では、前記判定部は、外気温が第１温度閾値よりも高く、かつ圧縮機温度が第２温度閾値よりも高い場合に、前記圧縮機が過負荷状態であると判定する構成とすることができる。 Further, in the above air conditioner, the determination unit determines that the compressor is in an overload state when the outside air temperature is higher than a first temperature threshold and the compressor temperature is higher than a second temperature threshold. It can be configured to

本発明の空気調和機は、外気温および圧縮機温度が共に高いような過負荷状態においても、第２の起動シーケンスで圧縮機を起動することによって、圧縮機の確実な起動を行うことができるといった効果を奏する。 The air conditioner of the present invention can reliably start the compressor by starting the compressor in the second starting sequence even in an overload state where both the outside air temperature and the compressor temperature are high. It has such an effect.

実施の形態１に係る空気調和機の概略構成図である。1 is a schematic configuration diagram of an air conditioner according to Embodiment 1. FIG. 実施の形態１に係る空気調和機の運転開始時における圧縮機起動シーケンスを示すフローチャートである。4 is a flow chart showing a compressor start-up sequence at the start of operation of the air conditioner according to Embodiment 1. FIG. 第１の起動シーケンスにおけるモータ駆動電流と圧縮機回転数との変化を示すタイミングチャートである。4 is a timing chart showing changes in motor drive current and compressor rotation speed in the first startup sequence; 第２の起動シーケンスにおけるモータ駆動電流と圧縮機回転数との変化を示すタイミングチャートである。9 is a timing chart showing changes in motor drive current and compressor rotation speed in a second startup sequence;

〔実施の形態１〕
以下、本発明の実施の形態１について、図面を参照して詳細に説明する。図１は、本実施の形態１に係る空気調和機１０の概略構成図であり、空気調和機１０において適用される冷凍サイクルを示している。 [Embodiment 1]
Embodiment 1 of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a schematic configuration diagram of an air conditioner 10 according to Embodiment 1, and shows a refrigeration cycle applied in the air conditioner 10. As shown in FIG.

空気調和機１０は、室内ユニット（室内機）１００および室外ユニット（室外機）１１０により構成されている。空気調和機１０における冷凍サイクル（ヒートポンプ）の経路上には、室内ユニット１００側に室内熱交換器１０１が備えられており、室外ユニット１１０側に圧縮機１１１、室外熱交換器１１２、四方弁１１３および膨張弁１１４が備えられている。また、室内ユニット１００には、室内熱交換器１０１で熱交換された空気を室内に送り出すための室内ファン１０２が備えられており、室外ユニット１１０には、室外熱交換器１１２に空気を送るための室外ファン１１５が備えられている。 The air conditioner 10 includes an indoor unit (indoor unit) 100 and an outdoor unit (outdoor unit) 110 . An indoor heat exchanger 101 is provided on the indoor unit 100 side on the path of the refrigeration cycle (heat pump) in the air conditioner 10, and a compressor 111, an outdoor heat exchanger 112, and a four-way valve 113 are provided on the outdoor unit 110 side. and an expansion valve 114 are provided. In addition, the indoor unit 100 is provided with an indoor fan 102 for sending out the air heat-exchanged by the indoor heat exchanger 101 indoors, and the outdoor unit 110 is provided with an indoor fan 102 for sending air to the outdoor heat exchanger 112. outdoor fan 115 is provided.

また、空気調和機１０は、外気温を検出する第１温度センサ１２１と、圧縮機温度を検出する第２温度センサ１２２とを備えている。第１温度センサ１２１は、室外熱交換器１１２の吸気温度を外気温として検出するものとする。尚、図１では詳細な図示を省略しているが、空気調和機１０には、第１温度センサ１２１および第２温度センサ１２２以外にも、必要に応じて冷凍サイクル内の各部の温度を検出する温度センサが適宜設けられている。 The air conditioner 10 also includes a first temperature sensor 121 that detects the outside air temperature and a second temperature sensor 122 that detects the compressor temperature. The first temperature sensor 121 detects the intake air temperature of the outdoor heat exchanger 112 as the outside air temperature. Although detailed illustration is omitted in FIG. 1, in addition to the first temperature sensor 121 and the second temperature sensor 122, the air conditioner 10 detects the temperature of each part in the refrigeration cycle as necessary. A temperature sensor is provided as appropriate.

四方弁１１３は、空気調和機１０の冷房／暖房運転に応じて、冷媒の循環の向きを切り替えるものである（図１は冷房運転時の状態を示している）。冷房運転時には、圧縮機１１１、四方弁１１３、室外熱交換器１１２、膨張弁１１４、室内熱交換器１０１、四方弁１１３、圧縮機１１１の順で冷媒が循環する。すなわち、冷房運転時には、室外熱交換器１１２が凝縮器、室内熱交換器１０１が蒸発器として機能する。一方、暖房運転時には、圧縮機１１１、四方弁１１３、室内熱交換器１０１、膨張弁１１４、室外熱交換器１１２、四方弁１１３、圧縮機１１１の順で冷媒が循環する。すなわち、暖房運転時には、室内熱交換器１０１が凝縮器、室外熱交換器１１２が蒸発器として機能する。 The four-way valve 113 switches the direction of refrigerant circulation according to the cooling/heating operation of the air conditioner 10 (FIG. 1 shows the state during the cooling operation). During cooling operation, the refrigerant circulates through the compressor 111, the four-way valve 113, the outdoor heat exchanger 112, the expansion valve 114, the indoor heat exchanger 101, the four-way valve 113, and the compressor 111 in that order. That is, during cooling operation, the outdoor heat exchanger 112 functions as a condenser, and the indoor heat exchanger 101 functions as an evaporator. On the other hand, during heating operation, the refrigerant circulates through the compressor 111, the four-way valve 113, the indoor heat exchanger 101, the expansion valve 114, the outdoor heat exchanger 112, the four-way valve 113, and the compressor 111 in that order. That is, during heating operation, the indoor heat exchanger 101 functions as a condenser, and the outdoor heat exchanger 112 functions as an evaporator.

図２は、本実施の形態１に係る空気調和機１０の運転開始時における圧縮機１１１の起動シーケンス（圧縮機起動シーケンス）を示すフローチャートである。以下の圧縮機起動シーケンスは、空気調和機１０に備えられる制御部（図示省略）が、圧縮機１１１の駆動モータ（図示省略）の駆動電流（モータ駆動電流）を制御することによって実施される。 FIG. 2 is a flowchart showing a startup sequence (compressor startup sequence) of the compressor 111 when the air conditioner 10 according to Embodiment 1 starts operating. The following compressor startup sequence is performed by a control unit (not shown) provided in the air conditioner 10 controlling the drive current (motor drive current) of the drive motor (not shown) of the compressor 111 .

空気調和機１０が運転を開始するとき、第１温度センサ１２１が外気温を検出し、第２温度センサ１２２が圧縮機温度を検出する。検出された外気温および圧縮機温度は、制御部において、それぞれ第１温度閾値Ｔ１（例えば５０℃）および第２温度閾値Ｔ２（例えば８０℃）と比較される（Ｓ１，Ｓ２）。 When the air conditioner 10 starts operating, the first temperature sensor 121 detects the outside air temperature, and the second temperature sensor 122 detects the compressor temperature. The detected outside air temperature and compressor temperature are compared with a first temperature threshold T1 (eg, 50° C.) and a second temperature threshold T2 (eg, 80° C.), respectively (S1, S2).

制御部（判定部）は、検出された外気温および圧縮機温度に基づいて、運転開始時に圧縮機１１１が過負荷状態であるか否かを判定する。外気温および圧縮機温度の少なくとも一方が閾値以下である場合、すなわち“外気温≦Ｔ１”または“圧縮機温度≦Ｔ２”の場合（Ｓ１またはＳ２がＮＯ）は過負荷状態ではないと判定されてＳ３に移行する。外気温および圧縮機温度が共に閾値より高い場合、すなわち“外気温＞Ｔ１”かつ“圧縮機温度＞Ｔ２”の場合（Ｓ１，Ｓ２が共にＹＥＳ）は過負荷状態であると判定されてＳ４に移行する。 The control unit (determining unit) determines whether the compressor 111 is in an overload state at the start of operation based on the detected outside air temperature and compressor temperature. When at least one of the outside air temperature and the compressor temperature is below the threshold, that is, when "outside air temperature ≤ T1" or "compressor temperature ≤ T2" (S1 or S2 is NO), it is determined that the overload state is not present. Move to S3. If both the outside air temperature and the compressor temperature are higher than the threshold, that is, if "outside air temperature>T1" and "compressor temperature>T2" (both S1 and S2 are YES), it is determined that there is an overload condition, and the process proceeds to S4. Transition.

Ｓ３では、第１の起動シーケンスにて圧縮機１１１の起動が開始される。第１の起動シーケンスは、圧縮機１１１が過負荷状態でない場合に適用される通常の起動シーケンスであり、起動時の振動および騒音の抑制効果が高い起動シーケンスとされている。図３は、第１の起動シーケンスにおけるモータ駆動電流と圧縮機回転数との変化を示すタイミングチャートである。 In S3, activation of the compressor 111 is started in the first activation sequence. The first startup sequence is a normal startup sequence that is applied when the compressor 111 is not overloaded, and is a startup sequence that is highly effective in suppressing vibration and noise during startup. FIG. 3 is a timing chart showing changes in motor drive current and compressor rotation speed in the first startup sequence.

圧縮機１１１を起動させる場合、通常は、モータ駆動電流を途中で強制的に上昇させることで、圧縮機回転数を所望の回転数まで上昇させる。ここでは、圧縮機回転数を最終的にＮ３（例えば３５００ｒｐｍ）まで上昇させる圧縮機起動シーケンスを例示する。また、本実施の形態１では、モータ駆動電流を上昇させるタイミングは圧縮機回転数に基づいて制御されるものとする。このため、本実施の形態１に係る制御部は、圧縮機回転数を監視している。 When the compressor 111 is started, the motor drive current is usually forcibly increased midway to increase the compressor rotation speed to a desired rotation speed. Here, a compressor start-up sequence for finally increasing the compressor rotation speed to N3 (for example, 3500 rpm) is illustrated. Further, in Embodiment 1, it is assumed that the timing for increasing the motor drive current is controlled based on the compressor rotation speed. Therefore, the control unit according to the first embodiment monitors the compressor rotation speed.

第１の起動シーケンスでは、図３に示すように、起動開始時はモータ駆動電流をＩ１とし、圧縮機回転数がＮ１１（例えば１５００ｒｐｍ）に到達した時点（時刻ｔ１１）でモータ駆動電流をＩ２に強制的に上昇させる。さらに、圧縮機回転数がＮ１２（例えば２０００ｒｐｍ）に到達した時点（時刻ｔ１２）でモータ駆動電流の上昇を終了させる。そして、圧縮機回転数がＮ３に到達（時刻ｔ１３）し、モータ駆動電流がＩ３に安定すれば圧縮機１１１の起動が完了する（圧縮機起動シーケンスが終了する）。ここでは、モータ駆動電流Ｉ３が圧縮機回転数Ｎ３に対応するモータ駆動電流である。 In the first startup sequence, as shown in FIG. 3, the motor drive current is set to I1 at the start of startup, and the motor drive current is set to I2 when the compressor rotation speed reaches N11 (for example, 1500 rpm) (time t11). forced to rise. Furthermore, when the compressor rotation speed reaches N12 (for example, 2000 rpm) (time t12), the increase of the motor drive current is terminated. Then, when the compressor rotation speed reaches N3 (time t13) and the motor drive current stabilizes at I3, the start-up of the compressor 111 is completed (the compressor start-up sequence ends). Here, the motor drive current I3 is the motor drive current corresponding to the compressor rotation speed N3.

起動開始から時刻ｔ１１までの間は、圧縮機回転数の増加に伴って仕事量が増えるため、電流も増加している。時刻ｔ１１から時刻ｔ１２の間は、モータ駆動電流Ｉ３よりも電流値の大きいモータ駆動電流Ｉ２が強制的に印加され、電流値はほぼ一定となる。時刻ｔ１２においてモータ駆動電流の上昇期間が終了すると、モータ駆動電流はその時の圧縮機回転数に応じた電流に変化（低下）する。そして、時刻ｔ１２から時刻ｔ１３の間は、圧縮機回転数がＮ３に安定するまで圧縮機回転数の増加に伴って仕事量が増えるため、電流も増加している。 From the start to time t11, the amount of work increases as the compressor rotation speed increases, so the current also increases. Between time t11 and time t12, motor drive current I2 having a larger current value than motor drive current I3 is forcibly applied, and the current value becomes substantially constant. When the rising period of the motor drive current ends at time t12, the motor drive current changes (decreases) to a current corresponding to the compressor rotation speed at that time. From time t12 to time t13, the current increases as the work load increases as the compressor rotation speed increases until the compressor rotation speed stabilizes at N3.

第１の起動シーケンスでは、モータ駆動電流を上昇させるタイミング（すなわち、圧縮機回転数Ｎ１１，Ｎ１２）は、起動時の振動や騒音を抑制できるように設定されている。 In the first startup sequence, the timing for increasing the motor drive current (that is, the compressor rotation speeds N11 and N12) is set so as to suppress vibration and noise during startup.

Ｓ４では、第２の起動シーケンスにて圧縮機１１１の起動が開始される。第２の起動シーケンスは、圧縮機１１１が過負荷状態であり、通常の起動シーケンスでは起動失敗が起こりやすいと判断される場合に適用される起動シーケンスである。すなわち、第２の起動シーケンスは、第１の起動シーケンスに比べると起動時の振動や騒音が大きくなるが、過負荷状態においても圧縮機１１１の確実な起動が行える。図４は、第２の起動シーケンスにおけるモータ駆動電流と圧縮機回転数との変化を示すタイミングチャートである。 In S4, activation of the compressor 111 is started in the second activation sequence. The second start-up sequence is applied when it is determined that the compressor 111 is in an overloaded state, and start-up failure is likely to occur in the normal start-up sequence. That is, the second startup sequence causes greater vibration and noise at the time of startup than the first startup sequence, but the compressor 111 can be reliably started even in an overloaded state. FIG. 4 is a timing chart showing changes in motor drive current and compressor rotation speed in the second startup sequence.

第２の起動シーケンスでは、図４に示すように、起動開始時はモータ駆動電流をＩ１とし、圧縮機回転数がＮ２１（例えば２０００ｒｐｍ）に到達した時点（時刻ｔ２１）でモータ駆動電流をＩ２に強制的に上昇させる。さらに、圧縮機回転数がＮ２２（例えば２５００ｒｐｍ）に到達した時点（時刻ｔ２２）でモータ駆動電流の上昇を終了させる。そして、圧縮機回転数がＮ３に到達（時刻ｔ２３）し、モータ駆動電流がＩ３に安定すれば圧縮機１１１の起動が完了する（圧縮機起動シーケンスが終了する）。第２の起動シーケンスでは、モータ駆動電流の上昇期間の切替えタイミングとなる圧縮機回転数を、第１の起動シーケンスよりも大きな回転数としている。すなわち、Ｎ２１＞Ｎ１１かつＮ２２＞Ｎ１２となる。 In the second startup sequence, as shown in FIG. 4, the motor drive current is set to I1 at the start of startup, and the motor drive current is set to I2 when the compressor rotation speed reaches N21 (for example, 2000 rpm) (time t21). forced to rise. Furthermore, when the compressor rotation speed reaches N22 (for example, 2500 rpm) (time t22), the increase of the motor drive current is terminated. When the compressor rotation speed reaches N3 (time t23) and the motor drive current stabilizes at I3, the start-up of the compressor 111 is completed (the compressor start-up sequence ends). In the second start-up sequence, the compressor rotation speed, which is the switching timing of the rising period of the motor drive current, is set to a higher rotation speed than in the first start-up sequence. That is, N21>N11 and N22>N12.

圧縮機１１１の起動時には、モータ駆動電流を上昇させるタイミングで駆動モータのロータが加速するが、圧縮機１１１が過負荷状態のときには、この加速タイミングで起動失敗が生じやすい。第２の起動シーケンスでは、第１の起動シーケンスよりも圧縮機回転数を上げた状態でモータ駆動電流を上昇させるため、モータ駆動電流を上昇させるタイミングが第１の起動シーケンスよりも後ろにずらされたものとなる。このように、モータ駆動電流を上昇させるタイミングを後ろにずらすことで、駆動モータのロータに十分な回転惰性が働いた状態で駆動モータのロータが加速されることとなり、圧縮機１１１の起動失敗を防止することができる（確実な起動が行える）。 When the compressor 111 is started, the rotor of the drive motor is accelerated at the timing of increasing the motor drive current. In the second start-up sequence, the motor drive current is increased while the compressor rotation speed is higher than in the first start-up sequence. It becomes a thing. By delaying the timing of increasing the motor drive current in this manner, the rotor of the drive motor is accelerated in a state in which sufficient rotational inertia acts on the rotor of the drive motor. can be prevented (reliable start-up can be performed).

〔実施の形態２〕
上記実施の形態１では、第１の起動シーケンスおよび第２の起動シーケンスにおいて、モータ駆動電流を上昇させるタイミングを圧縮機回転数に基づいて制御している。しかしながら、本発明はこれに限定されるものではなく、モータ駆動電流を上昇させるタイミングを、起動開始からの経過時間に基づいて制御することも可能である。 [Embodiment 2]
In the first embodiment described above, the timing for increasing the motor drive current is controlled based on the compressor rotation speed in the first startup sequence and the second startup sequence. However, the present invention is not limited to this, and it is also possible to control the timing of increasing the motor drive current based on the elapsed time from the start of activation.

例えば、図３に示すタイミングチャートにおいて、圧縮機回転数がＮ１１に到達すると予測される時間ｔ１１、および圧縮機回転数がＮ１２に到達すると予測される時間ｔ１２を予め設定しておき、制御部は時間ｔ１１およびｔ１２が経過した時点でモータ駆動電流を上昇させるようにしてもよい。 For example, in the timing chart shown in FIG. 3, time t11 at which the compressor rotation speed is expected to reach N11 and time t12 at which the compressor rotation speed is expected to reach N12 are set in advance, and the control unit The motor drive current may be increased after the times t11 and t12 have passed.

同様に、図４に示すタイミングチャートにおいて、圧縮機回転数がＮ２１に到達すると予測される時間ｔ２１、および圧縮機回転数がＮ２２に到達すると予測される時間ｔ２２を予め設定しておき、制御部は時間ｔ２１およびｔ２２が経過した時点でモータ駆動電流を上昇させるようにしてもよい。 Similarly, in the timing chart shown in FIG. 4, a time t21 at which the compressor rotation speed is expected to reach N21 and a time t22 at which the compressor rotation speed is expected to reach N22 are set in advance, and the control unit may increase the motor drive current when times t21 and t22 have passed.

本実施の形態２に係る圧縮機起動シーケンスでは、制御部は圧縮機回転数を監視する代わりに、タイマによる時間計測によって圧縮機起動シーケンスを実行することができる。 In the compressor startup sequence according to the second embodiment, instead of monitoring the compressor rotation speed, the controller can execute the compressor startup sequence by measuring time with a timer.

〔実施の形態３〕
上記実施の形態１では、第１の起動シーケンスおよび第２の起動シーケンスともに、起動途中で段階的に上昇させるモータ駆動電流（起動電流）の電流値（すなわちＩ１，Ｉ２）を同じとしている。しかしながら、本発明はこれに限定されるものではなく、起動電流を、第１の起動シーケンスおよび第２の起動シーケンスで異ならせるものとしてもよい（最終的に到達させるモータ駆動電流Ｉ３は同じである）。 [Embodiment 3]
In the first embodiment described above, the current values (ie, I1, I2) of the motor drive current (starting current) to be increased stepwise during starting are the same for both the first starting sequence and the second starting sequence. However, the present invention is not limited to this, and the starting current may be different between the first starting sequence and the second starting sequence (the motor drive current I3 to be finally reached is the same. ).

具体的には、第２の起動シーケンスの起動電流Ｉ１’，Ｉ２’を、第１の起動シーケンスにおける起動電流Ｉ１，Ｉ２よりも大きな電流としてもよい（Ｉ１’＞Ｉ１かつＩ２’＞Ｉ２）。このように、第２の起動シーケンスにおける起動電流を第１の起動シーケンスにおける起動電流よりも大きくすることで、圧縮機１１１の起動失敗をより確実に防止することができる。 Specifically, the starting currents I1' and I2' in the second starting sequence may be larger than the starting currents I1 and I2 in the first starting sequence (I1'>I1 and I2'>I2). Thus, by making the starting current in the second starting sequence larger than the starting current in the first starting sequence, it is possible to more reliably prevent the compressor 111 from failing to start.

〔実施の形態４〕
上記実施の形態１では、第２の起動シーケンスを実施する過負荷状態を、外気温および圧縮機温度に基づいて判定している。しかしながら、本発明はこれに限定されるものではなく、第２の起動シーケンスを実施する過負荷状態を、他のパラメータに基づいて判定することも可能である。 [Embodiment 4]
In Embodiment 1 above, the overload state for executing the second startup sequence is determined based on the outside air temperature and the compressor temperature. However, the present invention is not limited to this, and it is also possible to determine the overload condition for performing the second activation sequence based on other parameters.

例えば、第２の起動シーケンスを実施する過負荷状態を、外気温と、前回の運転停止からの経過時間とに基づいて判定することが考えられる。すなわち、圧縮機温度は、前回の運転停止から十分な時間が経過すれば、過負荷状態とならない程度にまで温度が下がると想定されるが、十分な時間が経過していなければ温度が高いままであると予測される。 For example, it is conceivable to determine the overload condition for executing the second startup sequence based on the outside temperature and the elapsed time since the previous shutdown. In other words, if enough time has passed since the last shutdown, the compressor temperature is expected to drop to the extent that it does not become overloaded. is expected to be up to

このため、本実施の形態４に係る圧縮機起動シーケンスは、外気温が第１温度閾値Ｔ１（例えば５０℃）よりも高く、かつ前回の運転停止からの経過時間が予め定められた時間閾値（例えば１時間）よりも短い場合に圧縮機１１１が過負荷状態であると見なし、第２の起動シーケンスを実施するものであってよい。 Therefore, in the compressor startup sequence according to the fourth embodiment, the outside air temperature is higher than the first temperature threshold T1 (for example, 50° C.), and the time threshold ( for example, one hour), the compressor 111 may be considered overloaded and a second start-up sequence may be implemented.

今回開示した実施形態はすべての点で例示であって、限定的な解釈の根拠となるものではない。従って、本発明の技術的範囲は、上記した実施形態のみによって解釈されるものではなく、特許請求の範囲の記載に基づいて画定される。また、特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれる。 The embodiments disclosed this time are exemplifications in all respects and are not grounds for restrictive interpretation. Therefore, the technical scope of the present invention is not to be interpreted only by the above-described embodiments, but is defined based on the claims. In addition, all changes within the meaning and range of equivalents to the scope of claims are included.

１０ 空気調和機
１００ 室内ユニット（室内機）
１０１ 室内熱交換器
１０２ 室内ファン
１１０ 室外ユニット（室外機）
１１１ 圧縮機
１１２ 室外熱交換器
１１３ 四方弁
１１４ 膨張弁
１１５ 室外ファン
１２１ 第１温度センサ
１２２ 第２温度センサ 10 air conditioner 100 indoor unit (indoor unit)
101 indoor heat exchanger 102 indoor fan 110 outdoor unit (outdoor unit)
111 compressor 112 outdoor heat exchanger 113 four-way valve 114 expansion valve 115 outdoor fan 121 first temperature sensor 122 second temperature sensor

Claims (3)

運転開始時に圧縮機が過負荷状態であるか否かを判定する判定部と、
前記圧縮機の起動制御を行う制御部とを備え、
前記制御部は、
前記判定部によって前記圧縮機が過負荷状態でないと判定された場合には、第１の起動シーケンスにて前記圧縮機を起動させ、
前記判定部によって前記圧縮機が過負荷状態であると判定された場合には、第２の起動シーケンスにて前記圧縮機を起動させ、
前記第１および第２の起動シーケンスは、前記圧縮機のモータ駆動電流を起動途中で強制的に上昇させる期間を含んで、圧縮機回転数を所望の回転数まで上昇させる起動シーケンスであり、
前記第２の起動シーケンスでは、前記モータ駆動電流を上昇させるタイミングが、前記第１の起動シーケンスよりも後ろにずらされていることを特徴とする空気調和機。 A determination unit that determines whether the compressor is in an overloaded state at the start of operation;
A control unit that performs start-up control of the compressor,
The control unit
when the determining unit determines that the compressor is not in an overloaded state , starting the compressor in a first starting sequence;
when the determining unit determines that the compressor is in an overloaded state , starting the compressor in a second starting sequence ;
The first and second startup sequences are startup sequences for increasing the compressor rotation speed to a desired rotation speed, including a period during which the motor drive current of the compressor is forcibly increased during startup,
The air conditioner according to claim 1, wherein, in the second start-up sequence, timing for increasing the motor drive current is shifted later than in the first start-up sequence. 請求項１に記載の空気調和機であって、
前記第１および第２の起動シーケンスは、前記圧縮機回転数が所定の圧縮機回転数に到達したタイミングで前記モータ駆動電流を上昇させる起動シーケンスであり、
前記第２の起動シーケンスでは、前記所定の圧縮機回転数が、前記第１の起動シーケンスよりも大きな圧縮機回転数とされていることを特徴とする空気調和機。 The air conditioner according to claim 1 ,
The first and second startup sequences are startup sequences for increasing the motor drive current at the timing when the compressor rotation speed reaches a predetermined compressor rotation speed,
The air conditioner according to claim 1, wherein in the second activation sequence, the predetermined compressor rotation speed is set to a greater compressor rotation speed than in the first activation sequence. 請求項１または２に記載の空気調和機であって、
前記判定部は、外気温が第１温度閾値よりも高く、かつ圧縮機温度が第２温度閾値よりも高い場合に、前記圧縮機が過負荷状態であると判定することを特徴とする空気調和機。 The air conditioner according to claim 1 or 2 ,
The determination unit determines that the compressor is in an overload state when the outside air temperature is higher than a first temperature threshold and the compressor temperature is higher than a second temperature threshold. machine.
JP2019127507A 2019-07-09 2019-07-09 air conditioner Active JP7319115B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2019127507A JP7319115B2 (en) 2019-07-09 2019-07-09 air conditioner
CN202010634181.9A CN112212482B (en) 2019-07-09 2020-07-02 Air conditioner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2019127507A JP7319115B2 (en) 2019-07-09 2019-07-09 air conditioner

Publications (2)

Publication Number Publication Date
JP2021011995A JP2021011995A (en) 2021-02-04
JP7319115B2 true JP7319115B2 (en) 2023-08-01

Family

ID=74059083

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2019127507A Active JP7319115B2 (en) 2019-07-09 2019-07-09 air conditioner

Country Status (2)

Country Link
JP (1) JP7319115B2 (en)
CN (1) CN112212482B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003039942A (en) 2001-07-30 2003-02-13 Suzuki Motor Corp Air conditioner for electric vehicle
JP2005337679A (en) 2004-05-31 2005-12-08 Matsushita Electric Ind Co Ltd Refrigerator
JP2008104337A (en) 2006-09-21 2008-05-01 Sanyo Electric Co Ltd Control unit of electromotor for refrigerant compressor

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62233652A (en) * 1986-04-01 1987-10-14 松下電器産業株式会社 Heat pump type air conditioner
JPH06213548A (en) * 1993-01-18 1994-08-02 Hitachi Ltd Refrigerator
JP3506457B2 (en) * 1993-04-23 2004-03-15 東芝キヤリア株式会社 Startup control method of compressor in air conditioner
JPH10267432A (en) * 1997-03-24 1998-10-09 Mitsubishi Heavy Ind Ltd Actuation control device of air conditioner
CN101917152B (en) * 2010-07-29 2013-01-16 宁波奥克斯空调有限公司 Starting method of permanent-magnet synchronous compressor for variable-frequency air conditioner
JP2015105648A (en) * 2013-12-03 2015-06-08 カルソニックカンセイ株式会社 Electric compressor and its control method
CN104791960B (en) * 2015-04-30 2018-02-06 广东美的制冷设备有限公司 A kind of air conditioner unloading control system and method
CN106123417B (en) * 2016-06-27 2018-09-11 广东美的制冷设备有限公司 A kind of control method and control device of compressor of air conditioner startup
CN109028491B (en) * 2018-08-13 2020-07-31 宁波奥克斯电气股份有限公司 Variable frequency air conditioner compressor soft start method and system and air conditioner

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003039942A (en) 2001-07-30 2003-02-13 Suzuki Motor Corp Air conditioner for electric vehicle
JP2005337679A (en) 2004-05-31 2005-12-08 Matsushita Electric Ind Co Ltd Refrigerator
JP2008104337A (en) 2006-09-21 2008-05-01 Sanyo Electric Co Ltd Control unit of electromotor for refrigerant compressor

Also Published As

Publication number Publication date
JP2021011995A (en) 2021-02-04
CN112212482B (en) 2023-07-04
CN112212482A (en) 2021-01-12

Similar Documents

Publication Publication Date Title
JP6854901B2 (en) Air conditioner
CN106796070B (en) Variable speed compressor control with acoustic defrost mode
US9719709B2 (en) Air-conditioning apparatus with thermo-off postponement control
JP2002272167A (en) Air conditioner and its drive method
JP2018128194A (en) Air conditioner
CN113405231B (en) Self-cleaning sterilization control method and device for air conditioner, air conditioner and storage medium
CN110953662A (en) Air conditioner
JP2016114345A (en) Air conditioner
JP2019082278A (en) Air conditioner
JP2011252639A (en) Air conditioner
CN113405229B (en) Self-cleaning sterilization control method and device for air conditioner, air conditioner and storage medium
JP7319115B2 (en) air conditioner
JP3597053B2 (en) Air conditioner
JP5686754B2 (en) Air conditioner
JP2003240311A (en) Control method for air conditioner
JPH1030835A (en) Controller for air conditioner
JP5902521B2 (en) Control device for compressor motor and air conditioner equipped with the same
JP2007212023A (en) Air conditioning system
WO2021095237A1 (en) Cold heat source unit and refrigeration circuit device
JP2011158190A (en) Method for controlling air-conditioner
KR101097976B1 (en) A method for controlling an operation of refrigerators
CN112050381A (en) Air conditioner
JP2015052438A (en) Refrigeration unit
JP2006343095A (en) Air conditioner
JPH09178273A (en) Air conditioner

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20220323

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20230131

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20230207

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20230407

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20230711

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20230720

R150 Certificate of patent or registration of utility model

Ref document number: 7319115

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150