JPS61212311A - Dehumidifying device - Google Patents

Abstract

PURPOSE:To eliminate necessity for introduction of external atmosphere and introducing duct of the atmospheric air and to reduce the running cost by forming a closed circuit for the air for regeneration and installing a heat pump provided with an evaporator exchanging heat with the air after regeneration and a condenser exchanging heat with the air before regeneration. CONSTITUTION:Wet air (c) discharged from a drying chamber (or air conditioning chamber) 11 is dehydrated by passing through a honeycomb rotor 12 provided with plates contg. an absorbent such as LiCl, etc. or an adsorbent such as active carbon, etc., then transferred to the drying chamber 11. The rotor 12 having absorbed or adsorbed the moisture is transferred to the passage of air by turning, and regenerated with the air (d) at high temp. and low humidity formed by exchanging heat in a condenser 14 of a heat pump. The air (e) at low temp. and high humidity after the regeneration is cooled in a heat exchanger 21, further cooled and dehumidified in an evaporator 16 of the heat pump, heated in the heat exchanger 21 through a fan 23, then heated further in the condenser 14 of the heat pump and transferred to the rotor 12. The cycle is repeated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a dehumidifying device applied to dryers, dehumidifiers, solvent recovery devices, and the like.

[Conventional technology]

FIG. 3 shows a conventional absorption or adsorption dehumidifier, which is a honeycomb dehumidifier. In addition to the honeycomb type that performs continuous absorption or adsorption and regeneration as shown in Figure 3, there are conventional absorption and adsorption types that perform absorption or adsorption and regeneration in a batch manner. better known.

In FIG. 3, the honeycomb rotor 1 is equipped with an absorbent or adsorbent, and when the air sent by the fan 5 passes through the honeycomb rotor 1, water is absorbed or adsorbed in the moisture absorption zone 2 and becomes dry air. Become.

On the other hand, the honeycomb rotor 1 rotates slowly, and the portion that was in the air path of the moisture absorption zone 2 moves to the air path of the regeneration zone 5. On the regeneration air side, first the outside air is passed through heater 4.
When the relative humidity decreases to υ, the water in the honeycomb rotor 1 in the regeneration zone 3 is evaporated to lower the water content. The humid air is exhausted to the outside via the fan 6.

The effects of absorption or adsorption and regeneration in the dehumidifying device shown in FIG. 3 will be explained on the psychrometric diagram shown in FIG. 4. Humid air from the drying chamber is dehumidified by the honeycomb rotor 1 and then sent to the drying chamber. At this time, the temperature is also rising due to latent heat of condensation. On the other hand, on the regeneration side, outside air C is heated by a heater 4 and sent to the honeycomb rotor 1 as heated air d to regenerate the honeycomb rotor 1, and as moisture evaporates, it is discharged to the outside as humid air e.

[Problem that the invention seeks to solve]

In the conventional device described above, it is necessary to introduce fresh outside air in order to regenerate the honeycomb rotor 1, which has a high moisture content due to absorption or adsorption of moisture in the moisture absorption zone 2. Therefore, there are restrictions on the installation location and duct installation space. There's a problem. Further, conventional absorption or adsorption type dehumidifiers are often used to obtain air with a low dew point, but they have the drawback of requiring a large amount of heat from the heater and increasing running costs.

The present invention is aimed at solving the problems and drawbacks of the conventional device described above, and is intended to eliminate the need for introducing outside air, solve the problems of installation location restrictions and duct installation space, and reduce running costs. The purpose of the present invention is to provide a dehumidifying device.

[Means for solving problems]

The present invention, as a means to achieve the above object, consists in forming a closed cycle path for regenerating air, which eliminates the need for introducing outside air, eliminates restrictions on installation location, and eliminates the need for ducts. As a result, the entire facility becomes compact.Furthermore, the present invention has the advantage of incorporating a heat pump, thereby reducing running costs.

That is, the present invention provides a dehumidifying device that absorbs moisture with an absorbent or adsorbent and heats and regenerates the absorbed absorbent or adsorbent, which forms a closed cycle path for the regeneration air, and A dehumidification device characterized by being equipped with a heat pump having an evaporator that exchanges heat with the air after regeneration of the absorbent and adsorbent circulating in a cycle path, and a condenser that exchanges heat with the air before regeneration. be.

Hereinafter, the present invention will be explained in detail based on FIG. 1st
The figure shows one embodiment of the present invention, and is an example in which a honeycomb rotor is used.

In FIG. 1, the honeycomb rotor 12 is made up of plates coated with lithium chloride as an absorbent, activated carbon, zeolite, etc. as an adsorbent, woven into a honeycomb shape, and air passes between the honeycombs.

A motor (not shown) is provided so that the honeycomb rotor 12 can rotate slowly, and the air path passing through the honeycomb rotor 12 is partitioned into a moisture absorption side and a regeneration side.

On the reproducing side, a compressor 13. A heat pump consisting of a condenser 14, an expansion valve 15 and an evaporator 16 is provided. This pump is a compression type pump that uses refrigerant. In the table and FIG. 1, 21 is a heat exchanger, and 22.25 is a fan.

To explain the operation of the device of the above embodiment, humid air (1) leaving the drying chamber (or air conditioning room) 11 is sucked into the fan 23, heated slightly by the heat of the fan, and then transferred to the two-cam rotor 12. The water is removed by an adsorbent or an absorbent, and the temperature is high.

The honeycomb rotor 12 that has absorbed moisture slowly rotates and moves to the regeneration air path. The air coming out of the condenser 14 (
power) has a high temperature and low humidity, so the honeycomb rotor 12
When the moisture is removed, the temperature becomes low and the humidity becomes air (ki). The air is cooled by the heat exchanger 21, further cooled and dehumidified by the evaporator 16, and heated by the heat exchanger 21 through the fan 23 which is the pressure source for sending air. )
, further passes through the condenser 14, is heated (power), and is sent to the honeycomb rotor 12, and the cycle is repeated.

On the other hand, in a heat pump, the refrigerant is converted into a high-pressure gas in the compressor 13, and is condensed by dissipating heat in the condenser 14. The liquid refrigerant is depressurized by the expansion valve 15, goes to the evaporator 16, absorbs heat, and returns to the compressor 13.

Figure 2 shows the movement on the psychrometric diagram. Symbols A to K indicate air conditions corresponding to the locations shown in Figure 81.

Although the δ1 cam type is shown above as an embodiment of the present invention, the present invention is not limited to this, and the heat pump can be similarly used in a two-column type that performs moisture absorption and regeneration in a patch type. Maku, the moisture! DK) If an organic solvent such as Recurne is adsorbed, it can be used as a solvent recovery device.

〔Effect of the invention〕

As described in detail above, the present invention forms a closed cycle path for regeneration air, so there is no need to introduce outside air for regeneration, and the dehumidifier is installed between the outside air introduction duct and the outside air exhaust. This produces the effect of not being restricted by the duct. Furthermore, since the present invention uses a heat pump, it has good energy efficiency and has the effect of reducing running costs compared to regeneration using conventional electric heaters or steam heaters. Furthermore, in the present invention, since the heat exchanger is disposed in the closed cycle path of the regeneration air, the load on the condenser and evaporator that constitute the heat pump is small, and the capacity of each is small. This will have the effect of making people feel more comfortable.

4 Simplified IIL Female Explanation of Drawings FIG. 1 is a diagram showing an embodiment of the present invention, in which a honeycomb type rotor is used. FIG. 2 is a diagram showing the state of airflow in the embodiment apparatus of FIG. 1. FIG. 5 shows a conventional honeycomb dehumidifying device, and FIG. 4 is a diagram showing the state of air flow in the conventional device shown in FIG.

Sub-agent: 1) Akira Sub-agent Ryo Hagi Hara - dry bulb temperature Figure 3 Figure 4 Dry diaphragm @ degree

Claims (1)

[Claims] In a dehumidifying device that absorbs moisture with an absorbent or adsorbent and heats and regenerates the absorbed absorbent or adsorbent, a closed cycle path is formed for the regeneration air, and the above-mentioned air that circulates through the cycle path is provided. A dehumidification device comprising a heat pump having an evaporator that exchanges heat with air after regenerating an absorbent or adsorbent, and a condenser that exchanges heat with air before regeneration.