HBDF MK2 - Defrost Case Study - AB Catering

BENEFITS OF USING DEFROST ON DEMAND HBDF-MK2 - DEFROST

PRODUCED BY HB PRODUCTS

HBDF-MK2 AT AB-CATERING, HINNERUP, DENMARK.

For years defrost cycles at AB-Catering have caused serious issues and have required adjustments regularly and as a minimum every spring and autumn.

Adjustments of defrost timer periods have been based on the evaporator furthest away from the compressor room to ensure complete defrost at every single evaporator in the room.

The downside of this philosophy has been that the evaporator located nearest the compressor room has been defrosting for a too long period causing condensation at the adjacent ceiling to drip down on the floor, and the conveyor belt where it freezes to ice blocks.

AB-Catering wanted to solve these issues and contacted ICS, a Danish-based contractor specializing in Ammonia refrigeration systems. ICS has for years been using numerous solutions from HB Products and saw this case as ideal to install the new defrost-on-demand technology from HB Products.

FACTS HBDF-MK2

is

generation

of

the

latest

Defrost

on-

Demand sensor solutions from HB Products. It differs from all other solutions in the market by

measuring

the

exact

thickness of the ice on the evaporators. The measurement is used to control the defrost cycle

only

when

there

is

a

need.

The sensor can either provide a digital signal when the evaporator needs to be defrosted and when the defrosting is done, or it can provide an analog signal linear to the frost layer for a PLC.

The

sensor

has

stainless-steel

an

wire

isolated which

is

mounted between the fins on the

air

inlet

evaporator.

side

of

Another

the

wire

is

connected to the chassis of the evaporator contact

which

with

the

has

electric

fins.

The

capacitance changes as the frost layer are built up on the fins.

The sensor can be installed both on new and existing evaporators. The sensor can be set up using the HB-Tool software by using the special USB cable and you are ready to go in minutes.

After some time in use, you can easily fine-tune the settings and thus get the full benefit from the advanced Defrost on Demand sensor from HB Products.

HB Products offers similar versions for Heat Pump applications as well as a special version for cold store applications running just above the freezing point.

Read more here