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.
대표청구항▼
1. A dehumidifying apparatus comprising: at least one air passage housing having an air inlet and an air outlet;a first heat exchanger disposed in the air passage housing;a second heat exchanger disposed in the air passage housing;a third heat exchanger disposed in the air passage housing;a moisture
1. A dehumidifying apparatus comprising: at least one air passage housing having an air inlet and an air outlet;a first heat exchanger disposed in the air passage housing;a second heat exchanger disposed in the air passage housing;a third heat exchanger disposed in the air passage housing;a moisture adsorbing unit disposed between the first heat exchanger and the second heat exchanger in the air passage housing to desorb moisture to air with a low relative humidity and adsorb moisture from air with a high relative humidity;an air sending device configured to send air to the first heat exchanger, the moisture adsorbing unit, the second heat exchanger, and the third heat exchanger in this order;a compressor configured to compress refrigerant;a bypass configured to allow the refrigerant discharged from the compressor configured to partially or entirely bypass the third heat exchanger;a flow control device to control a flow rate of the refrigerant flowing through the bypass;a first refrigerant circuit switching device to allow the first heat exchanger and the second heat exchanger to serve as a condenser and an evaporator, respectively, or allow the first heat exchanger and the second heat exchanger to serve as an evaporator and a condenser, respectively; andan expansion device configured to reduce a pressure of the refrigerant condensed by one of the first heat exchanger and the second heat exchanger,wherein the first refrigerant circuit switching device switches between a first refrigerant flow passage in which the refrigerant circulates through the compressor, the third heat exchanger, the second heat exchanger, the expansion device, and the first heat exchanger in this order and a second refrigerant flow passage in which the refrigerant circulates through the compressor, the third heat exchanger, the first heat exchanger, the expansion device, and the second heat exchanger in this order, andthe flow control device controls a flow rate of the refrigerant flowing through the bypass, and controls an amount of heating in the third heat exchanger. 2. A dehumidifying apparatus comprising: at least one air passage housing having an air inlet and an air outlet;a first heat exchanger disposed in the air passage housing;a second heat exchanger disposed in the air passage housing;a third heat exchanger disposed in the air passage housing;a moisture adsorbing unit disposed between the first heat exchanger and the second heat exchanger in the air passage housing to desorb moisture to air with a low relative humidity and adsorb moisture from air with a high relative humidity;an air sending device configured to send air to the air passage housing;a compressor configured to compress refrigerant;a first refrigerant circuit switching device configured to allow the first heat exchanger and the second heat exchanger to serve as a condenser and an evaporator, respectively, or allow the first heat exchanger and the second heat exchanger to serve as an evaporator and a condenser, respectively; andan expansion device configured to reduce a pressure of the refrigerant condensed by one of the first heat exchanger and the second heat exchanger, wherein the air sending device is configured to send air to the first heat exchanger, the moisture adsorbing unit, and the second heat exchanger in this order, andan amount of heating in the third heat exchanger is controlled with one of the flow rate of the refrigerant flowing through the third heat exchanger and a volume of air passing through the third heat exchanger. 3. A dehumidifying apparatus comprising: at least one air passage housing having an air inlet and an air outlet;a first heat exchanger disposed in the air passage housing;a second heat exchanger disposed in the air passage housing;a third heat exchanger disposed in the air passage housing;a moisture adsorbing unit disposed between the first heat exchanger and the second heat exchanger in the air passage housing to desorb moisture to air with a low relative humidity and adsorb moisture from air with a high relative humidity;an air sending device configured to send air to the first heat exchanger, the moisture adsorbing unit, the second heat exchanger, and the third heat exchanger in this order;an air passage switching device to switch a flow of air sent by the air sending device;a compressor configured to compress refrigerant;a flow control device to control a flow rate of the refrigerant discharged from the compressor and flowing through the third heat exchanger;a first refrigerant circuit switching device to allow the first heat exchanger and the second heat exchanger to serve as a condenser and an evaporator, respectively, or allow the first heat exchanger and the second heat exchanger to serve as an evaporator and a condenser, respectively; andan expansion device configured to reduce a pressure of the refrigerant condensed by one of the first heat exchanger and the second heat exchanger,wherein the first refrigerant circuit switching device switches between a first refrigerant flow passage in which the refrigerant circulates through the compressor, the third heat exchanger, the second heat exchanger, the expansion device, and the first heat exchanger in this order and a second refrigerant flow passage in which the refrigerant circulates through the compressor, the third heat exchanger, the first heat exchanger, the expansion device, and the second heat exchanger in this order, andthe air sending device and the air passage switching device control a volume of air passing through the third heat exchanger and control an amount of heating in the third heat exchanger. 4. The dehumidifying apparatus of claim 2, further comprising a flow control device to control a flow rate of the refrigerant discharged from the compressor and flowing through the third heat exchanger;a second refrigerant circuit switching device to allow the refrigerant flowing out of the third heat exchanger to flow into the first heat exchanger or the second heat exchanger; andwherein the first refrigerant circuit switching device and the second refrigerant circuit switching device allow the third heat exchanger to be connected in parallel with one of the first heat exchanger and the second heat exchanger, and switch between a first refrigerant flow passage in which the refrigerant circulates through the compressor, the third heat exchanger, the second heat exchanger, the expansion device, and the first heat exchanger in this order and a second refrigerant flow passage in which the refrigerant circulates through the compressor, the third heat exchanger, the first heat exchanger, the expansion device, and the second heat exchanger in this order, andthe flow control device controls the amount of heating in the third heat exchanger. 5. The dehumidifying apparatus of claim 2, further comprising: a bypass configured to allow the refrigerant discharged from the compressor configured to partially or entirely bypass the third heat exchanger; anda flow control device to control a flow rate of the refrigerant flowing through the bypass;whereinthe air passage housing includes a first air passage housing and a second air passage housing,the air sending device includes a first air sending device and a second air sending device,the first heat exchanger is disposed in the first air passage housing,the second heat exchanger is disposed in the first air passage housing,the third heat exchanger is disposed in the second air passage housing,the first air sending device sends air to the first heat exchanger, the moisture adsorbing unit, and the second heat exchanger in this order,the second air sending device sends air to the third heat exchanger,the first refrigerant circuit switching device switches between a first refrigerant flow passage in which the refrigerant circulates through the compressor, the third heat exchanger, the second heat exchanger, the expansion device, and the first heat exchanger in this order and a second refrigerant flow passage in which the refrigerant circulates through the compressor, the third heat exchanger, the first heat exchanger, the expansion device, and the second heat exchanger in this order, andthe flow control device controls a flow rate of the refrigerant flowing through the bypass, and controls the amount of heating in the third heat exchanger. 6. The dehumidifying apparatus of claim 5, further comprising: a dehumidifying unit including the first air passage housing; anda heat rejecting unit including the second air passage housing,wherein in the dehumidifying unit, air taken from a space to be dehumidified into the first air passage housing is supplied to the space to be dehumidified; andin the heat rejecting unit, air taken from one of a space to be dehumidified and a space outside the space to be dehumidified into the second air passage housing is discharged to the space outside the space to be dehumidified. 7. The dehumidifying apparatus of claim 2, wherein the dehumidifying apparatus executes one of a first operation mode allowing the third heat exchanger, the second heat exchanger, and the first heat exchanger to serve as a condenser, a condenser, and an evaporator, respectively;a second operation mode allowing the third heat exchanger, the second heat exchanger, and the first heat exchanger to serve as a condenser, an evaporator, and a condenser, respectively, and allowing the amount of heating in the third heat exchanger to be controlled;a third operation mode allowing the third heat exchanger, the second heat exchanger, and the first heat exchanger to serve as a condenser, an evaporator, and a condenser, respectively; anda fourth operation mode allowing the third heat exchanger, the second heat exchanger, and the first heat exchanger to serve as a condenser, a condenser, and an evaporator, respectively, and allowing the amount of heating in the third heat exchanger to be controlled. 8. The dehumidifying apparatus of claim 7, wherein in a normal operation, an adsorption reaction and a desorption reaction of the moisture adsorbing unit are repeatedly executed by switching between the first operation mode and the third operation mode. 9. The dehumidifying apparatus of claim 8, wherein to make an amount of moisture desorbed by the desorption reaction of the moisture adsorbing unit greater than that in the normal operation, the adsorption reaction and the desorption reaction of the moisture adsorbing unit are repeatedly executed by switching between the first operation mode, the third operation mode, and the second operation mode. 10. The dehumidifying apparatus of claim 7, wherein in a defrosting operation of one of the first heat exchanger and the second heat exchanger, the moisture adsorbing unit executes an adsorption reaction in the first operation mode,defrosting of the first heat exchanger frosted in the first operation mode is executed in the second operation mode,the moisture adsorbing unit executes a desorption reaction in the third operation mode,defrosting of the second heat exchanger frosted in the third operation mode is executed in the fourth operation mode, andby switching between the first operation mode, the second operation mode, the third operation mode, and the fourth operation mode, the adsorption reaction and the desorption reaction of the moisture adsorbing unit are repeatedly executed and the defrosting of one of the first heat exchanger and the second heat exchanger is executed. 11. The dehumidifying apparatus of claim 2, wherein the moisture adsorbing unit includes an adsorbing material having at least one point where an amount of equilibrium adsorption at a relative humidity of 80% or more is greater than or equal to 1.5 times an amount of equilibrium adsorption at a relative humidity of 40% to 60%. 12. The dehumidifying apparatus of claim 2, wherein the moisture adsorbing unit is secured in a resting state in an airflow passage. 13. The dehumidifying apparatus of claim 2, wherein the moisture adsorbing unit is formed by a porous flat plate to allow air to pass therethrough in a thickness direction thereof. 14. The dehumidifying apparatus of claim 2, wherein the moisture adsorbing unit is located directly adjacent to both the first heat exchanger and the second heat exchanger in the air passage housing. 15. The dehumidifying apparatus of claim 2, wherein the moisture adsorbing unit is located directly downstream from the first heat exchanger and is located directly upstream from the second heat exchanger in the air passage housing.
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이 특허에 인용된 특허 (3)
Otake,Masahisa; Mukaiyama,Hiroshi; Kamimura,Ichiro, Air conditioner.
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