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日立（Hitachi） LYA220A中央空調
日立（Hitachi） LYA220A螺桿壓縮機
日立（Hitachi） LYA220A ras/c-72nvy 變頻 3p
日立(hitachi) lya220a渦旋式壓縮機的詳細參數說明詳解
日立（Hitachi） LYA220A 渦旋式壓縮機的詳細參數說明
日立(hitachi) lya220a 渦旋式壓縮機的詳細參數說明手冊
這是日立（Hitachi） LYA220A 渦旋式壓縮機的詳細參數說明。
該型號是日立SET-FREE係列變頻多聯機（VRF係統）中常用的一款壓縮機，廣泛應用於中央空調係統。
| 參數類別 | 詳細說明 |
|---|---|
| 產品型號 | LYA220A |
| 制造商 | Hitachi（日立） |
| 壓縮機類型 | 全封閉渦旋式壓縮機 |
| 冷媒類型 | R410A |
| 額定電壓/相位/頻率 | 220-240V / 單相 / 50Hz （注：這是壓縮機電機本身的電壓，整個室外機電源可能為380V） |
| 排量 (Displacement) | 約 22.0 cc/rev 或 24.0 cc/rev （具體需查官方手冊，常見於該範圍） |
| 額定能力 (Cooling) | 約 5.5 - 6.0 kW （能力隨頻率變化，此為參考值） |
| 額定功率 (Input) | 約 1.8 - 2.2 kW （功率隨頻率變化，此為參考值） |
| 額定電流 (Current) | 約 9.0 - 11.0 A （於額定工況下） |
| 潤滑油類型/注油量 | 酯類油 (POE Oil) / 約 1.0 - 1.2 升 （具體以機身標簽為準） |
| 運行頻率範圍 | 寬頻變頻運行（例如 15 - 120 Hz），實現軟啟動和無級容量調節。 |
| 主要特點 | 1. 變頻技術：採用無刷直流電機（BLDC），部分負載效率。 2. 渦旋盤設計：日立專利的渦旋盤技術，泄漏低，可靠性高。 3. 低振動噪音：結構對稱，運行平穩，噪音和振動小。 4. 內置保護：壓縮機內置熱保護器。 |
| 應用範圍 | 主要用於日立SET-FREE係列5匹或6匹的變頻多聯式空調（VRF）的室外機中。 |
渦旋式壓縮原理：
通過兩個相互嚙合的渦旋盤（一個固定，一個繞行）形成連續變化的壓縮腔，將冷媒氣體從低壓區推向高壓區。
優點：相比往復式壓縮機，效率更高、運行更平穩、噪音振動更小、可靠性更佳。
變頻技術 (Inverter)：
節能：避免了頻繁啟停的巨大電流消耗，在部分負荷下能效比（COP）非常高。
舒適：室溫控制更，波動小，無啟停溫差感。
快速制冷/熱：啟動後可以高頻運行，迅速達到設定溫度。
這是該壓縮機的核心。它不像定頻壓縮機那樣簡單地“開/關”，而是通過改變電機運行頻率來無極調節其轉速。
好處：
冷媒 R410A：
這是一種混合制冷劑，工作壓力比傳統的R22高約1.6倍。
對係統和維修的要求：使用能承受高壓的管路組件（銅管、閥門等）和工具。抽真空、保壓、充注等操作要求非常嚴格，需要專業的售後人員操作。
內置保護：
壓縮機內部通常集成了過熱保護器，當壓縮機溫度異常升高時會自動切斷電路，防止電機燒毀，是重要的裝置。
非備件，需專業更換：壓縮機是空調係統的“心臟”，其更換是一項復雜的係統工程，由持有專業資質的技術人員操作。
係統匹配性：更換壓縮機時，確保新壓縮機與室外機的控制係統、換熱器、節流裝置等完全匹配。直接替換不同型號可能導致係統工作異常甚至損壞。
潤滑油管理：更換壓縮機時，嚴格處理潤滑油（POE油）。POE油具有的吸濕性，暴露在空氣中會迅速吸收水分，導致係統冰堵和酸性物質產生。需要嚴格按照規範操作，並補充或更換規定型號和數量的潤滑油。
係統清潔度：壓縮機燒毀後，會產生大量的酸性物質和金屬碎屑，污染整個係統。更換新壓縮機前，對係統管路進行的清洗和氮氣吹掃，否則新壓縮機很快會再次損壞。
抽真空和檢漏：由於使用R410A高壓冷媒，係統對真空度和密封性要求。使用高精度真空泵和電子檢漏儀進行操作。
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This is a detailed parameter description of the Hitachi LYA220A scroll compressor.
This model is a commonly used high-efficiency compressor in Hitachi SET-FREE series variable frequency multi split (VRF system), widely used in central air conditioning systems.
Overview of Core Parameters of Hitachi LYA220A Vortex Compressor
Detailed description of parameter categories
Product model LYA220A
Manufacturer Hitachi
Compressor type: Fully enclosed scroll compressor
Refrigerant type R410A
Rated voltage/phase/frequency 220-240V/single-phase/50Hz (note: this is the voltage of the compressor motor itself, and the entire outdoor unit power supply may be 380V)
Displacement is approximately 22.0 cc/rev or 24.0 cc/rev (please refer to the official manual for details, commonly found in this range)
Rated cooling capacity of approximately 5.5-6.0 kW (capacity varies with frequency, this is a reference value)
Rated power (Input) is approximately 1.8-2.2 kW (power varies with frequency, this is a reference value)
Rated current: approximately 9.0-11.0 A (under rated operating conditions)
Lubricating oil type/oil injection amount: POE Oil/approximately 1.0-1.2 liters (subject to the label on the machine)
Operating frequency range: wide frequency conversion operation (e.g. 15-120 Hz), achieving soft start and stepless capacity adjustment.
Main features: 1. Efficient frequency conversion technology: using brushless DC motor (BLDC), with extremely high efficiency for some loads.
2. Vortex disc design: Hitachi's patented vortex disc technology has low leakage and high reliability.
3. Low vibration noise: Symmetrical structure, smooth operation, low noise and vibration.
4. Built in protection: The compressor has a built-in thermal protector.
The application scope is mainly used in the outdoor units of Hitachi SET-FREE series variable frequency multi split air conditioners (VRF) with 5 or 6 horsepower.
Key Features and Application Description
Principle of Vortex Compression:
A continuously changing compression chamber is formed by two interlocking vortex discs (one fixed and one orbiting), which push the refrigerant gas from the low-pressure zone to the high-pressure zone.
Advantages: Compared to reciprocating compressors, it has higher efficiency, smoother operation, lower noise and vibration, and better reliability.
Inverter technology:
Energy saving: avoids the huge current consumption caused by frequent start stop, and has a very high coefficient of performance (COP) under partial load.
Comfort: More precise room temperature control, minimal fluctuations, and no temperature difference between start and stop.
Rapid cooling/heating: After starting, it can operate at high frequency and quickly reach the set temperature.
This is the core of the compressor. It is not simply "on/off" like a fixed frequency compressor, but adjusts its speed infinitely by changing the operating frequency of the motor.
Benefits:
Refrigerant R410A:
This is a mixed refrigerant with a working pressure about 1.6 times higher than traditional R22.
Requirements for system and maintenance: Pipeline components (copper pipes, valves, etc.) and specialized tools that can withstand high pressure must be used. The operation requirements for vacuum pumping, pressure holding, and filling are very strict and require professional after-sales personnel to operate.
Built in protection:
The compressor usually integrates an overheat protector inside, which automatically cuts off the circuit when the compressor temperature rises abnormally, preventing the motor from burning out, and is an important safety device.
Important precautions (maintenance and replacement)
Non spare parts require professional replacement: The compressor is the "heart" of the air conditioning system, and its replacement is a complex system engineering that must be operated by qualified technicians.
System compatibility: When replacing the compressor, it is necessary to ensure that the new compressor is completely compatible with the control system, heat exchanger, throttling device, etc. of the outdoor unit. Directly replacing different models may result in abnormal system operation or even damage.
Lubricating oil management: When replacing the compressor, it is necessary to strictly handle the lubricating oil (POE oil). POE oil has strong hygroscopicity, and when exposed to air, it quickly absorbs moisture, leading to system ice blockage and the production of acidic substances. It is necessary to strictly follow the standard operation and supplement or replace the specified model and quantity of lubricating oil.
System cleanliness: After the compressor burns out, it will produce a large amount of acidic substances and metal debris, polluting the entire system. Before replacing the new compressor, the system pipeline must be thoroughly cleaned and purged with nitrogen, otherwise the new compressor will soon be damaged again.
Vacuum pumping and leak detection: Due to the use of R410A high-pressure refrigerant, the system has extremely high requirements for vacuum degree and sealing. High precision vacuum pumps and electronic leak detectors must be used for operation.
Summary: Hitachi LYA220A is a single-phase variable frequency scroll compressor used in 5-6 horsepower multi split units, known for its high efficiency, reliability, and quietness. Its maintenance and replacement are professional technical tasks, and should not be operated by oneself.
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