JP2003294265A - Dry air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain an energy-saving and low-cost dry air conditioner. <P>SOLUTION: A casing 1 has therein an exhaust draft trunk 2 through which return air passes, an air-supply draft trunk 3 through which outside air passes, a flow-dividing trunk 17 divided from this exhaust draft trunk 2 and communicated with the air-supply draft trunk 3. In the air-supply draft trunk 3, a main heat-exchange coil 4 is provided under the lee of a communication portion with the flow-dividing trunk 17. A reheating coil 5 is provided under the lee of the main heat-exchange coil 4. A pre-cooling coil 6 is provided in the flow- dividing trunk 17. A circulation circuit 7 is provided for circulating a heat medium between the reheating coil 5 and the pre-cooling coil 6. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a dry air conditioner.

[0002]

2. Description of the Related Art Conventionally, an air conditioner that controls the temperature and humidity by cooling the supply air with a main heat exchange coil and then reheating it with a reheat coil is a reheat coil in which a heating medium heated by, for example, a hot water boiler flows. Was used.

[0003]

Therefore, there is a problem that equipment cost and running cost increase. Then, it aims at providing the dry air conditioner which solves these problems.

[0004]

In order to achieve the above object, the dry air conditioner of the present invention has a casing in which an exhaust air passage through which return air passes, an air supply air passage through which outside air passes, and the exhaust air blower. A shunt air duct that branches from the passage and communicates with the air supply air passage,
In this air supply air duct, a main heat exchange coil is provided leeward of the communicating portion with the diversion air passage, and a reheat coil is provided leeward of the main heat exchange coil to precool the diversion air passage. A coil is provided, and a circulation circuit for circulating a heat medium between the reheating coil and the precooling coil is provided. Further, the casing is provided with an exhaust air blow passage through which return air passes, and a supply air blow passage through which outside air passes. And a circulation circuit for circulating a heat medium between the reheating coil and the precooling coil.

[0005]

FIG. 1 shows an embodiment of a dry air conditioner according to the present invention. In this air conditioner, an exhaust air blow passage 2 through which return air passes and a supply air through which outside air passes in a casing 1. An air blowing passage 3 and a diversion air passage 17 that branches from the exhaust air blowing passage 2 and communicates with the supply air blowing passage 3. The solid and dotted outline arrows indicate the wind direction (blast direction). In the supply air blowing passage 3, the main heat exchange coil 4 is provided leeward of the communicating portion with the branch air passage 17, and the main heat exchange coil 4 is provided.
The reheating coil 5 is provided on the lee side of the reheating coil 5, the precooling coil 6 is provided on the diversion air passage 17, and the circulation circuit 7 for circulating the heating medium between the reheating coil 5 and the precooling coil 6 is provided.

An outside air intake 11, an air supply port 12, a return air intake 13 and an exhaust port 14 are formed in the casing 1, and the outside air intake 11 and the air supply port 12 are connected to each other through an air supply air passage 3. Then, the return air intake 13 and the exhaust port 14 are communicatively connected by the exhaust air blow passage 2. The return air intake 13 and the air supply port 12 are communicatively connected to the indoor through a duct or the like, and the outside air intake 11 and the exhaust port 1
4 is connected to the outside through a duct or the like. An air volume adjusting damper 8 is provided in the diversion air passage 17 so that the amount of exhaust air from the exhaust port 14 and the amount of return air mixture from the outside air intake 11 to the fresh air can be adjusted. Exhaust air duct 2 and supply air duct 3
An exhaust air blower 9 and an air supply blower 10 are provided in the.

The circulation circuit 7 includes a heat transfer medium pipe 15 for connecting the heat transfer pipe of the reheat coil 5 and the heat transfer pipe of the pre-cooling coil 6 so that the heat transfer medium can freely circulate, and the heat transfer medium inside the heat transfer pipe 15 as the reheat coil 5. A pump 16 that circulates between the pre-cooling coils 6 so that they can freely flow and stop.
And As the heat medium of the circulation circuit 7, water or antifreeze liquid,
Various things such as a refrigerant liquid can be used. The main heat exchange coil 4 has a heat transfer tube through which a heat medium from an external heat source generator (not shown) such as a cold / hot water generator flows.

To give an example of the cooling operation in this dry air conditioner, the return air taken in from the return air intake 13 is exhausted 14
And the return air passing through the branch air passage 17 is cooled by the heat absorption of the circulating heat medium of the pre-cooling coil 6, and the pre-cooled split return air and the fresh air taken in from the outside air intake 11 are mixed. Then, the main heat exchange coil 4 is cooled by the cooling heat medium, and the supercooled air supply is reheated by the heat radiation of the circulating heat medium of the reheat coil 5 to be supplied from the air supply port 12. In this way, since the reheat heat amount in the reheat coil 5 and the preheat heat amount in the precooling coil 6 are mutually used, there is no waste and the load on the main heat exchange coil 4 can be reduced. When performing heating operation, the main heat exchange coil 4
It suffices to let the heating medium flow through and to stop the pump 16.

FIG. 2 shows another embodiment, in which the casing 1 is
Exhaust air duct 2 for returning air and supply air duct 3 for outside air
In this air supply / blowing path 3, a precooling coil 6, a main heat exchange coil 4 and a reheating coil 5 are provided in this order in the leeward direction, and a heating medium is provided between the reheating coil 5 and the precooling coil 6. A circulation circuit 7 for circulating the is provided. In the illustrated example, the total heat exchanger 18 is provided on the windward side of the pre-cooling coil 6 across the supply air blowing passage 3 and the exhaust blowing passage 2, but the total heat exchanger 18 may be omitted. The other structure is the same as that of the above-mentioned embodiment, and the description thereof is omitted.

As an example of the cooling operation in this embodiment, after the raw fresh air taken in from the outside air intake 11 is cooled by the heat absorption of the circulating heat medium of the precooling coil 6, the heat of the main heat exchange coil 4 for cooling is cooled. It is further cooled with a medium, and this supercooled supply air is reheated by radiating the circulating heat medium of the reheating coil 5 and supplied from the air supply port 12. If the total heat exchanger 18 is used as shown in the figure, the excess heat of the return air taken in from the return air intake 13 can be used for cooling to the fresh air, resulting in energy saving.

[0011]

According to the first and second aspects of the present invention, reheating and precooling can be performed only by circulating a heating medium between the reheating coil and the precooling coil, and equipment costs such as a hot water boiler and operating costs are unnecessary. Low cost and energy saving. Compared with an air conditioner that incorporates a total heat exchanger with the same heat exchange capacity in place of the pre-cooling coil and reheat coil, there is no deterioration in capacity due to deterioration, and it is easy to increase capacity by increasing the number of rows, making the air conditioner compact. It is possible to reduce the running cost such as cost reduction, power cost, and maintenance cost. Further, in the invention of claim 1, the amount of fresh air introduced and the amount of exhaust gas can be freely adjusted, and by mixing the return air with the fresh air, the load on the main heat exchange coil can be reduced and further energy saving can be achieved. In the invention of claim 2, it can be used as an outside air processing air conditioner.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a front view showing another embodiment of the present invention.

[Explanation of symbols]

1 casing 2 exhaust air duct 3 Air supply air duct 4 Main heat exchange coil 5 Reheat coil 6 pre-cooling coil 7 Circulation circuit 17 minutes

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[Procedure amendment]

[Submission date] July 16, 2002 (2002.7.1)
6)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 2

[Correction method] Change

[Correction content]

Claims (2)

[Claims] 1. An exhaust air blow passage 2 through which return air passes, a supply air blow passage 3 through which outside air passes, and an exhaust air blow passage 2 inside a casing 1.
A shunt air passage 17 that is shunted from and communicates with the air supply air passage 3;
In the air supply air duct 3, the branch air duct 17 is provided.
The main heat exchange coil 4 is provided on the leeward side of the communicating portion with, the reheat coil 5 is provided on the lee side of the main heat exchange coil 4, and the precooling coil 6 is provided on the branch air passage 17. A dry air conditioner characterized in that a circulation circuit 7 for circulating a heat medium between the precooling coil 6 and the precooling coil 6 is provided. 2. A casing 1 is provided with an exhaust air blow passage 2 through which return air passes and a supply air blow passage 3 through which outside air passes, and in this air feed blow passage 3, a precooling coil 6 and a main cooling coil 6 are provided toward the leeward side. A dry air conditioner characterized in that a heat exchange coil 4 and a reheat coil 5 are provided in order, and a circulation circuit 7 for circulating a heat medium between the reheat coil 5 and the precooling coil 6 is provided.