JPS6269047A - Air-conditioning ventilation fan for duct - Google Patents

Abstract

PURPOSE:To make it possible to prevent dew condensation in a heat exchanger by providing a heat exchanger and a blower for its air exhaust and air supply and winding a piping for a cold and hot water coils in which hot water flows on the air supply connection on the outdoor side for the main body of the heat exchanger and heating and sending the outdoor air for the heat exchanger. CONSTITUTION:A main body 6 is provided with an exhaust air passage 1 which exhausts air a room 2, air supply passage 3 to exhaust the outdoor air, heat exchanger 5 in which heat exchange between the exhaust air and supply air is made, blower 7 for air exhaust and air supply for this heat exchanger. In the air space 9 under the roof the air supply and exhaust ducts 10 are connected to the main body 6. Around the outdoor side air supply duct connection 11 in the main body 6 a cold and hot water coil piping 12 is wound. The air space 9 under the roof and the inside of the room is partitioned by the ceiling board 8. With this arrangement, when cold or hot water is made to flow through the cold and hot water, the outdoor side supply air is cooled or warmed, and the water enters the heat exchanger 5, where the heat is exchanged and the room 2 is supplied with air. When the temperature difference between the indoor and outdoor is large in winter, the outdoor air is warmed by the hot water in the cold and hot water coil and no dew condensation develops in the heat exchanger 5 by the heat exchange with the exhaust air in the room.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is used as a means of ventilation in a room that is being cooled or heated, by discharging dirty indoor air and taking in fresh air from the outdoors. This relates to an air conditioning ventilation fan for ducts that exchanges heat with the air, transfers the thermal energy of exhausted indoor air to outdoor air, and recovers it indoors.

Conventional technology The structure of the heavy-duty duct was as shown in Figure 2. That is, the main body 106 includes an exhaust passage 100 for discharging air from the room 101, an air supply passage 102- for supplying air from the outdoors 103,
It has a heat exchanger 104 that exchanges heat between exhaust air and supply air, and exchanges heat between indoor air 101 and outdoor air 103 to perform ventilation (air supply).

exhaust).

Problems to be Solved by the Invention In such a conventional configuration, in the winter when there is a large temperature difference between indoors 101 and outdoors 103, condensation occurs in the heat exchanger 104, which leaks from the main body 105 and stains the ceiling board. There was a problem in that the appearance was damaged.

The present invention solves these problems and aims to prevent dew condensation from forming inside the heat exchanger.

Means for Solving the Problem In order to solve this problem, the present invention provides an exhaust passage for discharging indoor air into the main body, an air supply passage for supplying outdoor air, and an air supply passage between the exhaust and the air supply. It is equipped with a heat exchanger that exchanges heat with the heat exchanger, a blower for exhaust air, and air supply, and a cold/hot water coil pipe is wrapped around the outdoor air supply duct connection part of the main body. That is.

Function: By wrapping the cold/hot water coil piping containing hot water around the outdoor air supply duct connection of the main unit, the outdoor air is warmed and enters the heat exchanger, which prevents condensation inside the heat exchanger. This can be prevented.

Example An embodiment of the present invention will be described below with reference to FIG.

In the figure, the main body 6 includes an exhaust passage 1 for discharging indoor air 2, an air supply passage 3 for supplying outdoor air 4, a heat exchanger 5 for exchanging heat between the exhaust air and the supply air, and A heat exchanger 5 and a blower 7 for exhaust and air supply are incorporated, and a supply and exhaust duct 10 is connected to the main body 6 in the attic space 9.

A cold/hot water coil piping 12 is wound around the outdoor air supply duct connecting portion 11 of the main body 6. 8 in the figure is a ceiling plate that partitions the attic space 9 and the room; 13
is an insulating material.

In the above configuration, when cold/hot water flows through the cold/hot water coil 12, the temperature of the outdoor air supply is cooled or warmed, enters the heat exchanger 5, heat is exchanged, and the air is supplied into the room 2.

As described above, according to this embodiment, in winter, indoor 2 and outdoor 4
If there is a large temperature difference between the hot and cold water coils 12, the air outside 4 will be warmed before entering the heat exchanger 5, and no condensation will occur inside the heat exchanger 5. Furthermore, the temperature of the air supplied into the room 2 also increases. Similarly, in the summer, by flowing cold water through the cold/hot water coil 12, air is supplied into the room 2 at a temperature lower than that obtained through normal heat exchange.

Effects of the Invention As is clear from the description of the embodiments above, according to the present invention, even in the winter when there is a large temperature difference between indoors and outdoors, the cold/hot water coil is cooled before the cold outdoor air enters the heat exchanger. Since it is heated with hot water, there is no condensation inside the heat exchanger even when heat is exchanged with the indoor exhaust air, which has the effect of preventing problems such as condensed water leaking from the main unit and staining the ceiling material and causing stains on the ceiling material. can get.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a main part showing how an air-conditioning ventilation fan for a duct is installed according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of a main part showing a state of installation of a conventional air-conditioning ventilation fan for a duct. 1...Exhaust passage, 2...Indoor, 3...
...Air supply passage, 4...Outdoor, 5...
・Heat exchanger, 6...Main body, 7...Blower, 11...Outdoor air supply duct connection part, 12.
...Cold/hot water coil piping.

Claims (1)

[Claims] The main body includes an exhaust passage that exhausts indoor air, an air supply passage that supplies outdoor air, a heat exchanger that exchanges heat between the exhaust air and the air supply, and this heat exchanger, exhaust air, and air supply. This duct air conditioning ventilation fan has a built-in blower and a cold/hot water coil piping wrapped around the outdoor air supply duct connection part of the main unit.