Dafoss compressor or copeland compressor Condensing Unit 3 8 1 5HP

Danfoss Condensing Unit

- Danfoss compressor
- 1/3-1HP, R22, R134a, R404A
- Optional parts
- European quality & reasonable price

Danfoss Condensing Unit (1/3-2HP, equip with DANFOSS compressors which are made in China, air cooled, limited height 28cm, optional model without compressor)

Danfoss compressors:
1. High efficiency
2. Good reliability
3. Low noise low vibration
4. Original and new

Danfoss compressor

1. Adopt high efficient rotary compressor and Japan made motors, save power 10% or above.

2. The horizontal designed series can save much space.

3. Optimized design can be tightly built inside the equipment, which can save installation time and labor cost.

4. Widely used in freezing storage, cold room, automatic vendor machine, cold tanks on the ship, etc. As well as in the homeuse, commercial, refrigerator, refrigeration machine, dehumidifier, low-temperature laboratory device and some special refrigeration equipment.

The Danfoss BD F series compressors uses an electronically commutated permanent magnet variable speed brushless DC motor and must be used in conjunction with a Danfoss controller as shown in the photo.

These are purpose built compressors designed specifically to be operated from 12/24VDC for mobile refrigeration.

There are two types of controllers to choose from, the standard power module (101N0210) or the Adaptive Energy Optimizing module (101N0300).
The AEO module is more energy efficient as the compressor will always adapt its speed to the actual cooling demand.
The same controller is used for the BD35F and the BD50F.  
I wonder how many manufacturers use the more efficient AEO controller - it's about $US38 more expensive than the standard unit.
Jan 06 - Thanks to Steve and Helen of Explorer Fridge/Freezer, who informed me that the AEO module (101N0300) is not available in Aust .

These compressors are capable of operating over the range of 2,000 rpm to 3,500 rpm and will operate from 12VDC or 24VDC.
(The new BD80F compressor uses a different controller and operates in the range of 2,500 to 4,400 rpm.  Interestingly, all three are the same size and weight.)

A low voltage cut-out is incorporated into the controller.  It is factory set to cut out at 10.4V (22.8V) and cut back in at 11.7V (24.2V)
By a simple external resistor change this can be altered to a cut-out of 9.6V to 11.3V and cut-in of 10.9 to 12.5V.

Similarly, it is a simple matter to vary compressor speed to enhance cooling performance in the case where the fridge manufacturer has limited speed to 2,000 rpm in the interests of reducing instantaneous power consumption at the expense of rapid cooling.

Depending on head pressure, the BD35F at 12VDC can consume a minimum of 1.5A @ 2000 rpm to a maximum of 6.5A @ 3500 rpm.

The controllers also feature built in diagnostics by way of a flashing LED. There five fault conditions which can be read by counting the number of consecutive flashes.

The picture  shows the inside of a Danfoss compressor.