HUMIDITY CONTROLLER

摘要

An on-off valve and a bypass pipe which bypasses the on-off valve are connected to an inlet pipe and an outlet pipe of a humidity control circuit. A pressure-reducing valve is connected to the bypass pipe. Before switching a four-way valve, a degree of opening of the pressure-reducing valve is reduced to reduce a pressure difference between high and low pressure in the humidity control circuit. After that, the on-off valve is closed for pressure equalization between the high and low pressure in the humidity control circuit.

主权项

1. A humidity controller, including:
a heat-source-side circuit which has a compressor that compresses a refrigerant; and a humidity control circuit which has an adsorption heat exchanger carrying an adsorbent and a four-way valve that switches a flow direction of the refrigerant, and which is connected to the heat-source-side circuit by a connecting pipe, and the humidity controller being configured to alternately perform, by switching the four-way valve, an adsorption operation in which the adsorption heat exchanger serves as an evaporator and moisture in air is adsorbed to the adsorbent, and a regeneration operation in which the adsorption heat exchanger serves as a condenser and the moisture is desorbed from the adsorbent, the humidity controller comprising: a pressure difference reducing mechanism which reduces a pressure difference between a high pressure side and a low pressure side in the humidity control circuit before the four-way valve is switched.