A clear explanation of chiller structure, types, selection methods, and application examples

A chiller is a device that cools or regulates the temperature of a heat source by circulating water controlled at a constant temperature. It is used for a variety of purposes, including industrial machinery, medical equipment, scientific and chemical equipment, and food processing machinery.
It may also be called a chiller, chiller unit, unit cooler, or cooling water circulation device, but these are all synonymous.

Apiste 's
Various chiller series

Chiller structure and types

Chiller with built-in pump and tank / Pump and tankless chiller

Apiste 's PCU series is categorized into pump and tank built-in chillers and pump and tankless chillers. Choose the pump and tank built-in type if you want to supply cooling water directly to your facility, or choose the pump and tankless type if your facility has a pump and tank and you want to cool the water in the tank.

Pump/Tank built-in chiller

Pumps and Tankless Chillers

(When controlling the temperature of liquid in an open tank using the tank's built-in chiller)
The tank has a pressure pump on the discharge side, which provides sufficient discharge power, but there is no power on the inlet side. Therefore, in order to allow the same amount of cooling water to flow into the tank as the discharge volume, the load side (the side of the object to be cooled) must be a closed circuit.
When using an in-tank chiller to regulate the temperature of an open tank or a liquid that cannot be circulated directly, a heat exchanger is used to indirectly cool it, as shown in the diagram on the right.

For a detailed explanation of the structural differences and features between tank-mounted chillers and tankless chillers, click here

Air-cooling type /Water-cooled Chiller

The inside of a chiller unit consists of freezing cycle in which refrigerant circulates and a water circuit in which chilled water circulates, and there are two types of refrigerant cooling methods: Air-cooling type and water-cooled.

Air-cooling type chiller

Water-cooled chiller

[Chiller Structure] Click here for a detailed explanation of the differences between Air-cooling type and water-cooled chillers

How to select a chiller

Four steps to confirm and decide on a chiller

It is important to select a chiller that is suited to the equipment and work being cooled, and it is also important to match the chiller's functions, performance, and specification with the conditions and circumstances of use.

Easy chiller selection tool

If you have already decided on the conditions for the chiller you want to select, you can easily select the chiller that suits your purpose from this page.

Select the chiller that best suits your needs! Chiller Selection Guide

Find a Chiller

Select a chiller by type

Series	Refrigerant(g)	Control stability	Set temperature range	Control models	cooling capacity (kW)
Series	Refrigerant(g)	Control stability	Set temperature range	Control models	1	3	6	9	10	12	13	14
Uses non-freon-gas refrigerant HFC alternative chiller (PCU-NE)	HFC alternative	±0.1℃	5～40℃	air-cooled									Learn more
	HFC alternative	±0.1℃	5～40℃	water cooling									Learn more
Outdoor installation possible/Energy saving high-performance chiller (PCU-SL)	Freon	±0.1℃	-5～45℃	air-cooled									Learn more
	Freon	±0.1℃	-5～45℃	water cooling									Learn more
wide range-10 to 80°C Precision chillers (PCU-R)	Freon	±0.05℃	-10～80℃	air-cooled									Learn more
wide range-10 to 80°C Precision chillers (PCU-R)	Freon	±0.05℃	-10～80℃	water cooling									Learn more
Pump and tankless structure HFC alternative pump tankless chiller (PCU-F)	HFC alternative	±0.1℃	5～40℃	air-cooled									Learn more

Select a chiller based on refrigerant, cooling capacity, and setting temperature range

cooling capacity and circulating water temperature range table

We have a wide range of chillers available, so please find one that meets your requirements.

View the chiller product lineup

Chiller application examples

Chiller applications and benefits

Here is an example of Apiste chiller unit installation. Among industrial equipment and measuring devices, there are those that need to be kept at a constant temperature and those that are prone to generating heat, and chillers are used for cooling them.
By installing a chiller, you can ensure that your equipment operates stably and efficiently.

Mold cooling for injection molding machines

This eliminates the insufficient cooling that often occurs during high ambient temperatures, such as in summer, and contributes to reducing product defects.
High-frequency heating device

It provides stable cooling even in summer for parts that are prone to temperature rise, such as oscillators, coils, and quenching for cooling heat-treated products.
Arc welding machine

Welding conditions are stabilized by maintaining a constant temperature around the welding power supply and torch.