A liquid desiccant regenerator configured to produce a first output stream with a higher concentration of a liquid desiccant than a first input stream. The regenerator also produces a second output stream with a lower concentration of the liquid desiccant than a second input stream. Regeneration of the liquid desiccant in the liquid desiccant regenerator decreases a temperature of the liquid desiccant regenerator. The system includes an air contactor coupled to the first output stream and exposing an input air stream to the first output stream. The first output stream absorbs water from the input air stream to form at least one diluted output desiccant stream. A heat pump of the system is thermally coupled to move the heat from the first output stream to the liquid desiccant regenerator. The heat moved to the liquid desiccant regenerator increases an efficiency of the liquid desiccant regenerator.

A dehumidifying apparatus controls the amount of refrigerant flowing into a third heat exchanger serving as a condenser, so as to secure the amount of heat required for defrosting.

Integrated systems comprising both i) heat and mass exchange systems and ii) electrolysis stacks are disclosed, together with related methods of use. The disclosed systems cool and/or dehumidify air using two streams of salt solutions as liquid desiccants.

An ionic liquid desiccant system utilizes an ionic liquid desiccant to draw moisture from a working fluid, such as air that flow into an enclosure, such as a home. The desiccant may be mixed with the working fluid or a separator that allows moisture transport therethrough may be configured between the ionic liquid desiccant and the working fluid. The ionic liquid desiccant system may be part of an air conditioning system and may remove the moisture from air that is cooled by flowing over an evaporator or heat exchanger coupled with the evaporator. The ionic liquid desiccant may be pumped from a desiccant chamber to a regenerator chamber to remove absorbed moisture. A dual-purpose chamber may act as a desiccant chamber and as a regenerator chamber. A refrigeration system may have an electrochemical compressor and may utilize metal hydride heat exchangers.

The humidity control system includes: a moisture absorption unit; an atomizing and regenerating unit; and a circulation mechanism that causes a liquid hygroscopic material to circulate between the moisture absorption unit and the atomizing and regenerating unit, in which the atomizing and regenerating unit includes at least one storage tank that stores the liquid hygroscopic material, and an ultrasonic wave generating unit that is provided at the storage tank and emits ultrasonic waves, the ultrasonic wave generating unit forms a liquid column on a liquid surface of a first region, and a flow of the liquid hygroscopic material transported from the moisture absorption unit to the first region in the atomizing and regenerating unit is set in the circulation mechanism to be small relative to a flow of the liquid hygroscopic material supplied from the moisture absorption unit.

The present invention generally discloses desiccant dehumidifiers control systems. In particular, the present invention relates to solid desiccant dehumidifiers which use a rotor (commonly called a wheel) to dehumidify a process airstream. The invention provides a novel apparatus for control of desiccant dehumidifiers and to an improved method of control of such dehumidifiers, and also to dehumidifiers provided with such control systems.

A device for cooling and dehumidifying a first stream of air includes a first heat exchanger that cools the first stream of air from a first temperature to a lower second temperature, an absorber, a regenerator and one or more pumps and conduits. The device operates under conditions where liquid desiccant removes moisture from the first stream of air in the absorber and the second temperature of the first stream of air that leaves the first heat exchanger is lower than the temperature of the liquid desiccant supplied to the absorber.

A dehumidification system (1) comprising a sorption dehumidifier unit (2); a process air circuit (3) arranged to conduct a process air flow through desiccant material in the dehumidifier unit (2); a regeneration air circuit (4) arranged to conduct a regeneration air flow through desiccant material in the dehumidifier unit (2); and a heat pump (5) comprising an evaporator (6) and a condenser (7), where the system further comprises an intermediate fluid circuit (8) with a cooling fluid (C), arranged to cool the process air in a heat exchanger (9) before inlet of the process air into the dehumidifier unit (2), said intermediate fluid circuit (8) comprising a fluid pump (11) and a main conduit (8a) arranged to conduct cooling fluid (C) through the process air cooling heat exchanger (9) and through the evaporator (6) of the heat pump, and the intermediate fluid circuit (8) further comprising a flow control system (10) arranged to control the flow of cooling fluid (C) in the intermediate fluid circuit (8) to obtain a cooling fluid temperature dependent parameter value (T1) in the intermediate fluid circuit (8) upstream of the process air cooling heat exchanger (9), which corresponds to a given set-point cooling fluid temperature dependent parameter value (T1.sub.set).

The present invention relates to a dehumidification system and method and, in particular, to a system and method for controlling the humidity of air in a process or location using a desiccant-coated fluid-air heat exchanger. The desiccant material adsorbs water at or above ambient temperatures during an adsorption cycle, and the resultant air stream is of a reduced humidity compared with the humidity of the supply air. The desiccant material may then be dried during a regeneration cycle through addition of heating fluid through the heat exchanger, driving water back into the vapour state with addition of latent energy of vaporization. The desiccant material may be cooled, during the adsorption cycle, through addition of cooling fluid through the heat exchanger to maintain the temperature within a range sufficient for water vapour to be removed from the stream of air.

A dehumidifier comprises a main body and a main tank. The main body has a water collector, a secondary tank, a filtering assembly, and a water pump. The water collector has an exhaust hole. The secondary tank is located under the water collector and has a receiving hole aligned to the exhaust hole. The filtering assembly has a filter located between the exhaust hole and the receiving hole, and aligned to the exhaust hole. An area of the filter is bigger than an area of the exhaust hole. The water pump has a drawing opening communicating with the secondary tank and a draining opening communicating with the main tank. Thus, the water flowing out the exhaust hole will definitely pass through the filter before flowing into the secondary tank. Therefore, the filtering assembly prevents the water pump from drawing water with dusts and impurities and being damaged.