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US 5,816,065 AGranted
Desiccant assisted air conditioning system
AssigneeEbara Corporation
InventorKensaku Maeda
Life of this patent
Estimating the term…
Abstract
A high efficiency air conditioning system combining a desiccant assisted air conditioner with a heat pump device in which quick start-up of the system under all conditions by selecting a start-up mode operation is disclosed. The desiccant assisted air conditioning system comprises a recovery heat exchanger for recovering heat from the regeneration air flowing downstream of the desiccant device in the regeneration passage into the refrigerant flowing in the heat pump cycle passage for use as heat of evaporation in the heat pump device.
Claims36
A desiccant assisted air conditioning system comprising:
- a process air passage for flowing a process air;
- a regeneration air passage for flowing a regeneration air;
- a desiccant device which can be selectively communicated with any one of said process air passage and said regeneration air passage;
- a heat pump device having a compressor, an evaporator, a condenser and a heat pump cycle passage for flowing a refrigerant therein, said heat pump providing a heating heat source for heating said regeneration air and a cooling heat source for cooling said process air;
- a recovery heat exchanger for recovering heat from said regeneration air flowing downstream of said desiccant device in said regeneration air passage into said refrigerant flowing in said heat pump cycle passage for use as heat of evaporation in said heat pump device, said recovery heat exchanger being arranged downstream of and in series with said evaporator in said heat pump cycle passage;
- and
- switching means for selectively activating said recovery heat exchanger in accordance with a selected mode of operation of said desiccant assisted air conditioning system.
4 more elements
A desiccant assisted air conditioning system comprising:
- a process air passage for flowing a process air;
- a regeneration air passage for flowing a regeneration air;
- a desiccant device which can be selectively communicated with any one of said process air passage and said regeneration air passage;
- a heat pump device having a compressor, an evaporator, a condenser and a heat pump cycle passage for flowing a refrigerant, said heat pump providing a heating heat source for heating said regeneration air and a cooling heat source for cooling said process air;
- a regeneration promoting means for temporary promoting a regeneration ability of said regeneration air;
- switching means for selectively activating said regeneration promoting means in accordance with a selected mode of operation;
- a sensor for sensing absorption ability of said desiccant device;
- a controller for selecting a mode of operation from any one of a start-up mode in which said regeneration promoting means is activated and a normal mode in which said regeneration promoting means is not activated based upon an output signal of said sensor and operating said switching means.
5 more elements
A desiccant assisted air conditioning system comprising:
- a process air passage for flowing a process air;
- a regeneration air passage for flowing a regeneration air;
- a desiccant device which can be selectively communicated with any one of said process air passage and said regeneration air passage;
- a first heat pump device having a first compressor, a first evaporator, a first condenser and a first heat pump cycle passage for flowing a refrigerant therein, said first heat pump device providing a heating heat source for heating said regeneration air through heat exchange between said first condenser and a pre-desiccant regeneration air and a cooling heat source for cooling said process air through heat exchange between said first evaporator and a post-desiccant process air;
- a second heat pump device having a second compressor, a second evaporator, a second condenser and a second heat pump cycle passage for flowing a refrigerant therein, said second heat pump device recovering a heat from said regeneration air into said refrigerant through heat exchange between said second evaporator and a post-desiccant regeneration air and heating said process air through heat exchange between said second condenser and a pre-desiccant process air.
2 more elements
A method for controlling a desiccant assisted air conditioning system, said system comprising:
- a process air passage for flowing process air;
- a regeneration air passage for flowing regeneration air;
- a desiccant device which can be selectively communicated with any one of said process air passage and said regeneration air passage;
- a heat pump device having a compressor, an evaporator, a condenser and a heat pump cycle passage for flowing refrigerant therein, said heat pump providing a heating heat source for heating said regeneration air and cooling heat source for cooling said process air;
- and
- wherein a start-up is conducted by limiting a moisture adsorption into said desiccant device and prompting a temperature rise of said regeneration air.
3 more elements
Dependencies are inferred from the claim text.