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These calorimeters are based on the air enthalpy method, and are used to measure the performance of room, package and automobile air conditioners.
The air conditioner under test is installed in the normal way, and the heating and cooling capacity is calculated using the inlet and outlet air temperature and humidity, air flow values of the indoor unit of the air conditioner.
Use of a direct-expansion refrigeration method ,and an accurate highquality code tester(air flow measuring apparatuses) allows easy adaptation to changes in test conditions.
These calorimeters allow efficient testing of air conditioners under all conditions specified by JIS and ISO, and are indispensable devices in new product development.
JIS C 9612 room air conditioner
JIS B 8616 package air conditioner


Psychrometric Calorimeter(Air Enthalpy Measuring Device)

This type is equipped with a code tester(air-flow measuring apparatuses).The device is hermetically installed on the discharge side of the unit under test, and cooled air from the air conditioner passes into the air receiving chamber and the nozzle of the apparatus.At the same time,an auxiliary exhaust fan is controlled so that the static pressure of the air recreiving chamber is zero(atmospheric pressure).
The dry-bulb and wet-bulb temperature values are measuredat the inlet of the nozzle, and these temperature values are used to calculate the-air-flow, and obtain the capacity of the unit under test.


Air-flow Measuring Apparatus JIS standard
●The velocity of air passing through the air receiving chamber must be 0.76 m/s or less.
●The velocity of air passing through the air-flow measuring apparatuses must be 14 m/s or more.

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