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EPC Products Education Educational Food Technology FT36 Blast and Fluid Bed Freezer
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FT36 Blast and Fluid Bed Freezer

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Description

The blast freezer and fluid bed sections are contained inside an insulated cabinet along with the fan and evaporator. Access doors to both sections are fitted with observation windows and an electrically heated surround to prevent the doors from freezing in the closed position. Inside the cabinet, a fan with adjustable impeller transports air from the interior of the cabinet into the freezer ducting and through the evaporator tube bank where it transfers heat to the refrigerant.

The air, now reduced in temperature, passes through the tray section, which can be observed through a removable Perspex panel. It then changes direction and passes vertically up through the fluid bed section, back into the cabinet space where it is again circulated by the fan.
The blast freezer section contains five trays on to which the food samples to be frozen are placed. There is a facility for thermocouple sensor leads to pass into the ducting and through the cabinet wall so that freezing temperatures and rates can be monitored externally. There is a facility for a suitable anemometer to be inserted into the ducting to allow the air speed to be measured.
The compressor supplying the refrigerant to the evaporator is located externally on the same framework as the cabinet, as in the control system.
Air flow rate is varied by external control of a damper system and required air temperature is set externally using a microprocessor-based  controller.
A floor-standing, insulated freezer cabinet incorporating both blast and fluid bed freezer capabilities. Observation/access doors for both sections having heated perimeters to prevent freezing in closed position.
Blast freezer section having five removable stainless steel trays and a polycarbonate observation/loading section.
A 1.1kW axial flow fan blows air from the cabinet interior through an evaporator tube bank where the air is chilled. Refrigerant (R502) is circulated to the evaporator by an externally mounted 4kW compressor which is water cooled. The chilled air is guided via an aluminium duct to the blast freezer section at velocities up to 10 m/s. This velocity can be varied by external adjustment of a ‘damper’ system in the ducting. After the blast freezer section, the ducting turns vertically upward
and terminates with a 0.23m x 0.23m fluid bed section with adjustable surround. The chilled air then flows into the cabinet

space to be recirculated by the fan. Cabinet temperature is controlled by an external microprocessor controller down to a minimum of -35°C.


Technical specifications

Max air velocity

10 m/s

Minimum cabinet temp

-35°C

Blast freezer section

Number of trays

5

Cross-section  of duct

0.3m x 0.3m

Fluid bed section

Area of fluid  bed

0.05m2

Fluid bed surround height

Adjustable to 100mm

Evaporator fan

1.1kW

Compressor  (water cooled)

4.0kW

Overall dimensions

Length

3.30m

Width

1.80m

Height

1.70m

Packed and crated shipping specifications

Volume

10.0m3

Weight

1,225Kg



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Armfield,FT36,Blast and Fluid Bed Freezer