四通換向閥
是製冷設備中不可缺少的部件，工作原理是，當電磁閥線圈處於斷電狀態，先導滑閥在右側壓縮彈簧驅動下左移，高壓氣體進入毛細管後進入右端活塞腔，另一方麵，左端活塞腔的氣體排出，由於活塞兩端存在壓差，活塞及主滑閥左移，使排氣管與室外機接管相通，另兩根接管相通，形成製冷循環。
當電磁閥線圈處於通電狀態，先導滑閥在電磁線圈產生的磁力作用下克服壓縮彈簧的張力而右移，高壓氣體進入毛細管後進入左端活塞腔，另一方麵，右端活塞腔的氣體排出，由於活塞兩端存在壓差，活塞及主滑閥右移，使排氣管與室內機接管相通，另兩根接管相通，形成製熱循環。
four-way reversing valve
Is indispensable in the refrigeration equipment parts, working principle is, when the solenoid valve coil is in a power down state, the pilot valve on the right side of the compression spring drive left shift, high pressure gas into the capillary into the right end of the piston cavity, on the other hand, at the left end of the piston cavity of the gas discharge, by present on both ends of the piston pressure, piston and main valve spool moves to the left, exhaust pipe and the outdoor machine nozzle is communicated, the other two connection pipes communicated with, the formation of refrigeration cycle.
When the solenoid valve coil is in power on state, spool pilot in the electromagnetic coil to produce magnetic force to overcome the compression spring tension and shifted to the right, and the high-pressure gas into the capillary into the left end of the piston cavity, on the other hand, the right end of the piston cavity of the gas discharge, since the pressure difference at both ends of the piston, piston and main valve spool shift, exhaust pipe and the indoor machine nozzle is communicated, the other two connection pipes communicated with, forming of thermal cycling.
產品介紹
Product introduction
Function: the four way valve is suitable for heat pump system, such as central, unit type and room air conditioner, etc., by switching the flow path of refrigerant, the conversion of cooling mode and heating mode is realized.
Composition: by the main valve, pilot valve and solenoid coil, through the pilot valve control valve, the pressure switch action, the main valve to make the refrigerant circuit switching direction, thereby making the switch to the cooling system, the flexible and reliable.
| 品牌 | 蘭柯 | 型號 | DHF-20 |
| 連接方式 | 焊接 | 材質 | 黃銅 |
| 驅動方式 | 電磁 | 使用介質 | R22/R407C，R410A，R134A |
| 類型<通道位置> | 四通 | 零部件配件 | 閥體，線圈 |
| 最高工作壓力 | 4.15MPa | 許可流體溫度 | -20℃～120℃ |
| 氣密性實驗壓力 | 4.5MPa | 環境溫度 | -20℃～55℃ |
| 壽命 | 壓力為1.96MPa,大於2萬次 | 用途 | 冷熱轉換 |
characteristic：
1, product variety is complete: 1P/2P/3P
2 wide range of application: the product can be applied to R22, R134a, R407C, R410A and other cold media;
3 energy saving: low power consumption, lower than the average of about 20%;
4 bistable four way valve through the optimization of the electromagnetic coil to improve the design, can make the product after power down to maintain the required working state, in addition to the commutation action outside almost no longer consumes electric energy;
5 environmental protection: the use of environmentally friendly production technology.
Brand LAN Ke model DHF-20
Welding material brass
Drive mode electromagnetic using media R22/R407C, R410A, R134A
Type < channel position > four parts fittings valve body, coil
Maximum working pressure 4.15MPa permit fluid temperature -20 to 120
Air tightness test pressure 4.5MPa ambient temperature -20 ~ 55
Life pressure is 1.96MPa, more than 20 thousand times the use of hot and cold conversion
| 常用規格參數 GENERAL PARAMETER | ||||||||
| 型號 | 通徑 | R22名義容量 | 適用容量范圍〔參考值〕Applicable capacity range.〔KW〕 | 內泄露（Internal leakage） | 接管尺寸〔英寸〕 | |||
| Model | Pavement | R22capacity | R22/R407C | R410A | R134A | 〔L/min〕 | Joint pipe〔inch〕 | |
| 〔mm〕 | 〔US ton〕 | MIN/MAX | MIN/MAX | MIN/MAX | Max | D管 | ESC管 | |
| DHF-20A46 | 16 | 6 | 4 / 19 | 5 / 24 | 3 / 15 | 2 | 1/2 | 3/4 |
| DHF-20B46 | 4 / 19 | 5 / 24 | 3 / 15 | 2 | 1/2 | 3/4 | ||
| DHF-20A47 | 4 / 19 | 5 / 24 | 3 / 15 | 2 | 1/2 | 7/8 | ||
| DHF-20A57 | 4 / 19 | 5 / 24 | 3 / 15 | 2 | 5/8 | 7/8 | ||
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