JP2010078193A - Desiccant air conditioning device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dehumidification device using a moisture absorbing material aqueous solution and efficiently using a heat pump as a driving heat source for a regenerator and a dehumidifier and a desiccant air conditioning device using the dehumidification device. <P>SOLUTION: The dehumidification device comprises the regenerator and the dehumidifier. The regenerator using a dehumidification material aqueous solution has a condenser of the heat pump arranged inside the regenerator, uses condensation latent heat of the condenser of the heat pump for concentration of the dehumidification material aqueous solution, brings the dehumidification material aqueous solution into direct contact with the condenser and at the same time makes dehumidifying air (regeneration air) come into contact with and pass through the dehumidification material aqueous solution within the regenerator. The dehumidifier using the dehumidification material water solution has an evaporator of the heat pump arranged inside the dehumidifier, brings the dehumidification material aqueous solution into direct contact with the evaporator of the heat pump and at the same time makes air to be dehumidified (treatment air) come into contact with and pass through the dehumidification material water solution within the dehumidifier. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a desiccant air conditioner that improves the efficiency of a dehumidifier used for a desiccant air conditioner and pursues overall energy saving such as a desiccant air conditioner.

  Conventionally, many air conditioners provided with a dehumidifying device using a dehumidifying material have been proposed (see Patent Document 1). This air conditioner is called a desiccant-type air conditioner, and is an air conditioner that can dehumidify and humidify a room by using a moisture absorber that can absorb and release moisture.

  However, the dry / dehumidifier used in the air conditioner is mainly a dry type, and the apparatus is large in size, inefficient, and inferior in durability. Therefore, a wet type desiccant air conditioner using a dehumidifying material in a liquid state has been proposed. This uses lithium chloride or lithium bromide as a dehumidifying material, and uses a heat pump as a driving heat source. For example, as shown in FIG. The increased dehumidifying material aqueous solution is guided to the regenerator 6 and sprayed onto the filler 4 by the spray header 3 and brought into contact with the dehumidifying air (regenerated air) 5 to concentrate the dehumidifying material aqueous solution. Further, the dehumidifying material aqueous solution is cooled by the evaporator 7 of the heat pump 1, the dehumidifying material aqueous solution whose temperature is lowered is guided to the dehumidifier 8, and sprayed on the filler 10 by the spray header 9, and is used for dehumidification taken from the outside. The air to be dehumidified (treated air) 11 is dehumidified by being brought into contact with the air (treated air) 11.

Japanese Patent Laid-Open No. 9-42709

  However, the above-mentioned wet type desiccant air conditioner efficiently heats and cools the dehumidifier aqueous solution by using a heat pump, but the amount of heat for evaporating moisture from the dehumidifier aqueous solution in the regenerator is: It is compensated only by the sensible heat of the heated dehumidifying material aqueous solution, and the temperature of the dehumidifying material aqueous solution is lowered only by evaporation of a very small amount of water, and the concentration efficiency is low. In addition, in the dehumidifier, the amount of heat required for the dehumidifier aqueous solution to absorb the moisture of the dehumidified air (process air) is supplemented only by the sensible heat of the dehumidified aqueous solution, and only a slight amount of moisture is absorbed. The temperature of the dehumidifying material aqueous solution increased, and the dehumidifying effect was low.

  In order to compensate for the above drawbacks, it is necessary to circulate a large amount of the dehumidifying agent aqueous solution. In order to circulate the dehumidifying agent aqueous solution, not only a large pump and its power are required, but also the dehumidifying agent aqueous solution from the regenerator or dehumidifier There was a problem of scattering a lot.

  The present invention solves the low efficiency of the above-mentioned conventional device, and provides a dehumidifying device that can efficiently perform dehumidification by circulating a small amount of a dehumidifying aqueous solution, and a desiccant air conditioner using the same. It is intended to provide.

  Therefore, the regenerator of the present invention is a dehumidifier regenerator using a dehumidifying material aqueous solution, and includes a heat pump condenser inside the regenerator, and the condensation latent heat of the heat pump condenser is used to concentrate the dehumidifying material aqueous solution. The first feature is that the dehumidifying material aqueous solution is brought into direct contact with the condenser and the dehumidifying air (regenerated air) is brought into contact with and passed through the dehumidifying material aqueous solution in the regenerator at the same time. To do.

  Further, the dehumidifier of the present invention is a dehumidifier of a dehumidifier using an aqueous solution of dehumidifying material, and includes a heat pump evaporator in the dehumidifier, and the latent heat of evaporation of the evaporator of the heat pump is absorbed in the moisture absorption of the dehumidified material aqueous solution. The second feature is that the dehumidifying material aqueous solution is directly brought into contact with the evaporator and the air to be dehumidified (processed air) is brought into contact with and passed through the dehumidifying material aqueous solution in the dehumidifier at the same time. To do.

  And the desiccant air conditioner of this invention makes it the 3rd characteristic to comprise from the dehumidifier provided with the said regenerator and a dehumidifier, and a heat pump.

  Furthermore, the fourth feature is that the condenser and the evaporator of the heat pump are each covered with a member having the property of getting wet with the dehumidifying material aqueous solution.

  As a member having the property of getting wet with the dehumidifying material aqueous solution, a mesh material or a cloth material made of a natural material or a synthetic resin is desirable.

  According to the desiccant air conditioner according to the present invention, the heat pump condenser and evaporator are used as driving heat sources, the condensation heat of the heat pump is used for concentration of the dehumidifying material aqueous solution, and the heat pump evaporation is used for moisture absorption of the dehumidifying material aqueous solution. Since the latent heat is used, it is possible to lower the temperature of the condenser and raise the temperature of the evaporator, thereby improving the efficiency of the heat pump and performing high-performance dehumidification.

  Further, since the condenser and the evaporator of the heat pump are each covered with a member that has the property of getting wet with the dehumidifying agent aqueous solution, the contact area with the dehumidifying agent aqueous solution can be widened, and the dehumidifying agent aqueous solution may be scattered. There is an effect that there is no.

  Hereinafter, the best mode for carrying out the present invention will be described based on an embodiment shown in the drawings, but it is needless to say that the present invention is not limited to this embodiment. FIG. 2 is a system diagram showing an embodiment of the apparatus of the present invention.

  FIG. 2 shows a system diagram of the desiccant air conditioner 100 of the present invention, in which a dehumidifier 8 for treating dehumidified air (process air) 11 that requires dehumidification, and a lithium chloride aqueous solution as a dehumidifier are concentrated. The dehumidifier 8 and the heat pump 1 that is a driving heat source of the regenerator 6, and the dehumidifying material circulates efficiently through the heat exchanger 13 and the solution pump 14.

  The evaporator 7 of the heat pump 1 is provided inside the dehumidifier 8, and the refrigerant circulated by the discharge gas line 15 is depressurized and cooled by the expansion valve 16, supplied to the evaporator 7, and the heat exchanger. The dehumidifying material heat-exchanged by 13 is dropped onto the evaporator 7 by the spray header 9 provided on the upper side of the evaporator 7. Then, dehumidified air (process air) 11 that needs to be dehumidified is taken in from the lower side of the evaporator 7, dehumidified while in contact with the dehumidifying material to be dropped, and cooled by the latent heat of vaporization of the evaporator 7. Etc. Here, a cloth 12 that is easy to get wet with the dehumidifying material is wound around the coil 17 of the evaporator 7, and the dehumidifying material dropped by the spray header 9 falls on the surface of the coil 17 while being adsorbed by the cloth 12. Therefore, it does not scatter and the moisture of the processing air 11 can be absorbed by the latent heat of vaporization of the evaporator 7, so that the temperature rise of the dehumidifying material is small and the dehumidifying efficiency is high.

  The dehumidifying material dropped from the cloth 12 is reduced in concentration by dehumidifying the processing air 11 and is stored in a tank below the coil 17, and is sent to the regenerator 6 through the heat exchanger 13 by the solution pump 14. .

  Inside the regenerator 6, the condenser 2 of the heat pump 1 is provided, a high-temperature circulating refrigerant is supplied to the condenser 2 by the discharge gas line 15, and the dehumidifying material heat-exchanged by the heat exchanger 13 is It is dropped into the condenser 2 by a spray header 3 provided on the upper stage side of the condenser 2. And dehumidification air (regeneration air) 5 is taken in from the lower stage side of the condenser 2, and is heated and discharged while in contact with the dehumidifying material to be dropped. Further, the dehumidifying material is heated by the latent heat of condensation of the condenser 2, and the water is evaporated and concentrated. Here, the coil 18 of the condenser 2 is wound with a cloth 12 that is easily wetted by the dehumidifying material, and the dehumidifying material dripped by the spray header 3 falls in contact with the surface of the coil 18 while being adsorbed by the cloth 12. Therefore, the dehumidifying material can be heated and concentrated by the latent heat of condensation of the condenser 2, so that the temperature drop of the dehumidified dehumidifying material is small and the concentration efficiency is high.

  The dehumidifying material dropped from the cloth 12 is increased in concentration by the condenser 2 and is stored in a tank below the coil 18, and is sent to the dehumidifier 8 through the heat exchanger 13 by the solution pump 14.

  In the desiccant air conditioner of the present invention configured as described above, the refrigerant compressed by the compressor of the heat pump device is supplied to the condenser, and the dehumidifying material, which is an aqueous lithium chloride solution, is heated and concentrated to condense. After being condensed and liquefied, the refrigerant is cooled by a heat exchanger, then reduced in pressure through an expansion valve, supplied to an evaporator, and cooling and dehumidification of dehumidified air (process air) is performed. During this time, the dehumidifying material is circulated by the pump while exchanging heat by the heat exchanger, concentrated by the latent heat of condensation of the heat pump, and moisture is absorbed by the latent heat of vaporization of the heat pump. That is, unlike the desiccant air conditioner that heats and cools the dehumidifying material by the condenser and evaporator of the conventional heat pump, it is not the concentration of the dehumidifying material and the moisture absorption of the dehumidified air (processed air) only by the sensible heat of the dehumidifying material. Since the condensation latent heat and evaporation latent heat of the heat pump are used, it is possible to efficiently dehumidify by circulating a small amount of dehumidifying material.

  The desiccant air conditioner according to the present invention improves the efficiency of the dehumidifier used for the desiccant air conditioner and the like, and can achieve overall energy saving such as the desiccant air conditioner.

It is explanatory drawing which shows the conventional desiccant air conditioner. It is explanatory drawing which shows the desiccant air conditioner of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat pump 2 Condenser 3, 9 Spray header 4, 10 Filler 5 Dehumidification air (regeneration air)
6 Regenerator 7 Evaporator 8 Dehumidifier 11 Dehumidified air (processed air)
12 cloth 13 heat exchanger 14 solution pump 15 discharge gas line 16 expansion valve 17 and 18 coil 100 desiccant air conditioner

Claims (8)

  A dehumidifier regenerator using an aqueous dehumidifying material solution, comprising a heat pump condenser inside the regenerator, and using the latent heat of condensation of the heat pump condenser for concentrating the aqueous dehumidifying material solution, the condenser The dehumidifying material aqueous solution is brought into direct contact with the dehumidifying material aqueous solution and the dehumidifying air (regenerating air) is simultaneously brought into contact with and passed through the dehumidifying material aqueous solution in the regenerator.   A dehumidifier of a dehumidifier using an aqueous solution of dehumidifying material, comprising a heat pump evaporator inside the dehumidifier, utilizing the latent heat of evaporation of the evaporator of the heat pump for moisture absorption of the dehumidifying material aqueous solution, A dehumidifier characterized in that the dehumidifying material aqueous solution is directly brought into contact with and simultaneously passed through the dehumidifying air solution (process air) in contact with the dehumidifying material aqueous solution in the dehumidifier.   A dehumidifier having both the regenerator according to claim 1 and the dehumidifier according to claim 2.   A desiccant air conditioner comprising the dehumidifying device according to claim 3 and a heat pump.   A regenerator, wherein the condenser of the heat pump according to claim 1 is covered with a member having a property of getting wet with an aqueous solution of dehumidifying material.   The dehumidifier characterized by covering the evaporator of the heat pump of Claim 2 with the member with the property which gets wet to dehumidifier aqueous solution.   A dehumidifying device having both the regenerator according to claim 5 and the dehumidifier according to claim 6.   A desiccant air conditioner comprising the dehumidifying device according to claim 7 and a heat pump.

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