JPH05322209A - Heat exchanger disposing structure for dehumidifier - Google Patents

Abstract

PURPOSE:To prevent re-evaporation of condensed water generated upon cooling and dehumidifying while avoiding an increase in size of a heat exchanger structure in a dehumidifier in which a cooling heat exchanger for cooling and dehumidifying passed air and a reheating heat exchanger for reheating the passed air continued to the cooling and dehumidifying are disposed in an air duct crossing attitude in an air duct direction altering part for altering a downward air flow to a lateral direction. CONSTITUTION:A reheating heat exchanger 4A is disposed in a vertical attitude in an outlet part of an air duct direction altering part L, a cooling heat exchanger 3A is disposed at its upper end near an upper end of the exchanger 4A, and disposed in an oblique attitude to be separated from the exchanger 4A toward a lower end side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling heat exchanger for cooling and dehumidifying the passing air at an airflow diverting portion where a downward airflow is turned laterally, and the passing air is reheated after the cooling and dehumidifying. The present invention relates to a heat exchanger arrangement structure of a dehumidifying device in which a heat exchanger for reheating and a heat exchanger for heating are arranged in a cross airway posture.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 2, a cooling heat exchanger 3A and a subsequent reheat heat exchanger 4A are provided at an airflow diverting portion L where a downward airflow Ms is laterally diverted. Had placed them close to each other in a parallel posture.

[0003]

However, the condensed water w generated in the cooling heat exchanger 3A scatters to the downstream side together with the passing air Ms and reaches the reheat heat exchanger 4A. There is a problem that w is evaporated into the passing air Ms again by heating in the heat exchanger 4A for reheating, which causes a decrease in dehumidification function and waste of reheat energy.

Condensed water w for the reheat heat exchanger 4A
In order to prevent the heat exchanger 3A from being cooled down, as shown in FIG.
The heat exchanger 4A for reheating and the heat exchanger 4A for reheating may be arranged so as to be separated from each other in the air flow direction. There is a problem that the configuration becomes large.

An object of the present invention is to prevent the re-evaporation of condensed water as described above while avoiding an increase in the size of the apparatus due to a rational arrangement.

[0006]

A feature of the heat exchanger arrangement structure of the dehumidifying device according to the present invention is that the cooling heat for cooling and dehumidifying the passing air is cooled in the air duct turning portion where the downward airflow is turned sideways. In the configuration in which the exchanger and the reheat heat exchanger that reheats the passing air after cooling and dehumidifying are arranged in a cross air passage posture, the reheat heat exchanger is changed in the air passage diversion. The cooling heat exchanger is arranged in a vertical posture at the outlet portion of the section, the upper end of the cooling heat exchanger is close to the upper end of the reheat heat exchanger, and the lower end is inclined away from the reheat heat exchanger. It is placed in a posture, and its actions and effects are as follows.

[0007]

In other words, in the arrangement according to the above characteristic configuration (see FIG.
), The cooling heat exchanger 3A is located in the airway crossing state in a tilted posture at a position where the downward airflow Ms is being turned laterally, that is, at a position where the airflow direction is obliquely downward. Condensed water w generated in the cooling heat exchanger 3A is further downward and obliquely downward than the obliquely downward passage air flow Ms as air passes (shown by a broken line in FIG. 1).
The heat exchanger for reheating 4
It is possible to avoid getting onto A.

Further, the condensed water splashing from the cooling heat exchanger 3A tends to be concentrated in the lower half of the heat exchanger where the condensed water w generated in the cooling heat exchanger 3A flows down and accumulates. Therefore, the above-mentioned arrangement makes it more effective to prevent the user from getting down.

Since the cooling heat exchanger 3A is arranged in the airway crossing state by utilizing the space in the airway in the middle of which the downward airflow Ms is turned laterally, and further, in the inclined posture. As shown in FIG. 3, the heat exchanger 3A for cooling and the heat exchanger 4A for reheating are arranged apart from each other in the sideways air passage portion L ′, as shown in FIG. Even when the heat exchanger 3A is arranged in the horizontal posture at the inlet of the airflow deflecting portion L, the device configuration can be made smaller.

[0010]

[Effects of the Invention] That is, according to the present invention, it is possible to effectively prevent the re-evaporation of the condensed water due to the stepping on the reheat heat exchanger while avoiding an increase in the size of the apparatus, and improve the dehumidification performance. As a result, the waste of reheat energy can be avoided.

[0011]

EXAMPLES Next, examples will be described.

FIG. 1 shows the structure of a package type air conditioner, in which the return air RA returns from the area to be air-conditioned through the return air duct 1.
Is diverted to the return air RAs for circulation and the return air RAe for exhaust in the aircraft, and the outside air OA introduced from the outside through the outside air duct 2 is diverted to the ventilation outside air OAs and the heat source outside air OAe.

Then, the return air RAs for circulation and the outside air O for ventilation
The merging air Ms with As is circulated on the first heat exchanger 3A and the second heat exchanger 3A.
The heat exchanger 4A and the humidifier H are sequentially passed to adjust the temperature and humidity, and the adjusted air is used as the air supply SA to supply the air to the fan 5.
Is sent to the air supply duct 6 to the air conditioning target area.

Further, in parallel with this, the combined air Me of the exhaust return air RAe and the heat source outside air OAe is sequentially passed through the third heat exchanger 3B and the fourth heat exchanger 4B on the heat source side as an object to absorb and release heat. After passing through it, the exhaust fan 7 sends it to the outdoor exhaust duct 8.

The first and third heat exchangers 3A and 3B are the first
A single heat pump is configured with the compressor and the first expansion valve, and the second and fourth heat exchangers 4A and 4B constitute another single heat pump with the second compressor and the second expansion valve. For each, the circulation side heat exchangers 3A and 3B function as evaporators, and the heat source side heat exchangers 4A and 4B function as condensers. The refrigerant circulation mode can be switched to a state in which 3B functions as a condenser and the heat exchangers 4A and 4B on the heat source side function as evaporators.

In cooling, both the first heat exchanger 3A and the second heat exchanger 4A are made to function as air evaporators, or
Alternatively, the normal cooling operation in which only one of them is air-cooling function as an evaporator while one of them is stopped, the first heat exchanger 3A is air-cooling function as an evaporator, and the second heat exchanger 4A is The dehumidifying and cooling operation in which the condenser is reheated is selected according to the temperature and humidity load state of the air conditioning target area.

Further, in heating, both the first heat exchanger 3A and the second heat exchanger 4A are made to function as air condensers by heating the air, or only one of them is stopped and only the other is condensed. As a result, the air heating function is performed, and the humidifier H is operated.

An air passage in which the combined air Ms of the return air RAs for circulation and the outside air OAS for ventilation is changed from a downward flow to a lateral flow and flows out to the arrangement chamber 10 of the air supply fan 5 through the in-machine communication port 9. In the turning portion L, the first heat exchanger 3A, and
In arranging the second heat exchanger 4A, the second heat exchanger 4
A is the outlet portion of the air duct diversion portion L (that is, the in-machine communication port 9
(Opening position of the
On the other hand, the upper end of the first heat exchanger 3A is close to the upper end of the reheat heat exchanger, and the lower end of the first heat exchanger 3A is farther from the second heat exchanger 4A, and the lower end of the first heat exchanger 3A has the air passage diverting portion L. It is arranged in the airway crossing state in an inclined posture located at the outer corner of the.

In other words, with this heat exchanger arrangement, the air passing direction in the first heat exchanger 3A is set obliquely downward so that the first heat exchanger 3A produces an air cooling function in the dehumidifying and cooling operation. With the passage of air, the condensed water w is made to scatter further downward and obliquely downward than the passing airflow Ms that is obliquely downward, so that the condensed water w descends to the second heat exchanger 4A that reheats in the dehumidifying and cooling operation. Prevent hanging.

Reference numeral 11 is a drain pan for receiving the condensed water w generated in the first heat exchanger 3A when the first heat exchanger 3A functions as an evaporator, and 12 is the second heat exchanger 4A as an evaporator. This is a drain pan that receives the condensed water w generated in the second heat exchanger 4A when performing.

Another Embodiment Next, another embodiment will be described.

When the cooling heat exchanger 3A is arranged in an inclined posture so as to traverse the air passage, its specific inclination angle may be appropriately determined according to the air velocity, the vertical / horizontal dimension ratio of the air passage diverting portion L, and the like. Good.

The present invention can be applied to dehumidifying devices for various purposes such as humidity adjustment in person air conditioning and industrial air conditioning and drying of various articles.

A porous material such as a sponge or a corrugated plate may be laid on the drain pan 11 to prevent splashing and scattering of the falling condensed water.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a structural diagram of an air conditioner showing an embodiment.

[Fig. 2] Structure diagram of a conventional example

FIG. 3 is a structural diagram showing a comparative example.

FIG. 4 is a structural diagram showing another comparative example.

[Explanation of symbols]

 3A Cooling heat exchanger 4A Reheating heat exchanger L Airflow diverting part Ms Airflow (passing air)

Claims (1)

[Claims] 1. A cooling heat exchanger (3A) for cooling and dehumidifying passing air (Ms), and a cooling and dehumidifying device for cooling and dehumidifying passing air (Ms) in an air duct diverting portion (L) where a downward airflow (Ms) is diverted laterally. The heat exchanger for reheating (4A) for subsequently reheating the passing air (Ms) is a heat exchanger arrangement structure of a dehumidifying device in which the heat exchanger for reheating is arranged in a cross airway posture. The cooling device (4A) is arranged in a vertical posture at the outlet of the air duct diversion part (L), and the cooling heat exchanger (3) is arranged.
The upper end of A) is closer to the upper end of the reheat heat exchanger (4A), and the lower end is closer to the reheat heat exchanger (4A).
The heat exchanger arrangement structure of the dehumidifier arranged in an inclined posture away from A).