KR100705670B1 - Energy recovery ventilation having multiplicity of heat exchanger - Google Patents

Abstract

The present invention relates to a waste heat recovery ventilator which improves humidity control and heat exchange efficiency in a room by using a heat exchanger for sensible heat exchange and a heat exchanger for latent heat exchange. To this end, an air supply duct for sucking air from the outside and supplying air to the room and an exhaust duct for sucking air from the room and exhausting the air to the outside are partitioned by partition walls, and the air sucked through the air supply duct and the exhaust duct is heat exchanged. A waste heat recovery ventilator, comprising: a first heat exchanger configured to perform a first heat exchange between an internal air of the air supply duct and the indoor air; And a second heat exchange part for performing a second exchange between the air heat-exchanged primaryly in the first heat exchange part and the outdoor air. Therefore, by installing heat exchangers capable of sensible heat exchange and sensible heat and latent heat exchange in the waste heat recovery ventilator, respectively, the life of the heat exchange part due to moisture can be extended and heat exchange efficiency can be significantly improved.

Waste heat recovery, ventilator

Description

Waste recovery ventilation having a plurality of heat exchangers {Energy recovery ventilation having multiplicity of heat exchanger}

1 is a cross-sectional view showing the configuration of a general waste heat recovery ventilator.

Figure 2 is a cross-sectional view showing the configuration of the waste heat recovery ventilator according to the present invention.

3 is a block diagram showing the configuration of the waste heat recovery ventilator of FIG.

4 is a cross-sectional view showing an operating state of the waste heat recovery ventilator of FIG.

(Explanation of symbols for the main parts of the drawing)

100: case 130: exhaust inlet

131: exhaust port 140: air supply

141: air supply outlet 200: exhaust fan

210: air supply fan 300: first heat exchange part

310: second heat exchanger 400: bypass damper

500: temperature sensor 600: control unit

The present invention relates to a waste heat recovery ventilator, and more particularly, to a waste heat recovery ventilator which improves humidity control and heat exchange efficiency in a room by using a heat exchanger for sensible heat exchange and a heat exchanger for latent heat exchange.

In general, the air in an enclosed space increases the content of carbon dioxide and various harmful substances with time by the breathing of the living being, which interferes with the breathing of the living.

Therefore, if many people stay in a confined space such as an office or a vehicle, the indoor polluted air should be replaced with fresh air from time to time.

At this time, a commonly used ventilation device. Most conventional ventilation apparatuses employ a method of forcibly discharging only indoor air to the outside using a single blower.

However, when forcibly discharging only the indoor air by using one blower, the indoor air is discharged to the outside without filtration and the outdoor air is introduced without heat exchange through a door or window gap, thereby heating and cooling the room. The cost of cooling was unnecessarily high.

In addition, the sudden cold air and heat flows from the outside to the inside of the indoor air due to the rapid temperature change, people in the room feels uncomfortable, especially when the indoor air outside the window or door frame closed only to the outside The inflow of fresh air is blocked and oxygen deficiency can occur, as well as the humidity control of the indoor air is not made at all, although there is a problem that does not maintain a comfortable indoor environment despite the ventilation device is provided.

In order to solve this conventional problem, a waste heat recovery ventilator has been proposed in which outdoor air is first heat-exchanged with indoor air discharged to the outside and then supplied to indoors.

1, the waste heat recovery ventilator is provided with an air supply duct 10 into which the outdoor air flows into the inside of the box-shaped duct 1, and intersects with the air supply duct at a predetermined position. The exhaust duct 20 is guided to the outdoor is provided.

A heat exchanger 30 is provided to exchange heat between the outdoor air that is supplied at the point where the air supply duct 10 and the exhaust duct 20 intersect and the indoor air that is exhausted.

At this time, the air supply duct 10 and the exhaust duct 20 are not interfered with each other by the partition wall 3 partitioning the inside of the duct 1 up and down.

An air supply suction opening 11 is formed at one end of the air supply duct 10 and an air supply outlet 13 is formed at the other end of the air supply duct 20. The inlet 21 is formed and the other end is formed with an exhaust outlet 23 in communication with the outdoors.

An air supply fan 15 for forcibly sucking outdoor air is provided at the air supply inlet 11 of the air supply duct 10, and an air exhaust fan for forcibly discharging indoor air at the exhaust outlet 23 side of the exhaust duct 20. 25 is provided.

On the other hand, the heat exchanger 30 has a hexahedral shape in which the upper and lower edges are supported by the duct 1 and the left and right edges are supported by the partition wall 3, and a plurality of air supply passages 37 communicating with the air supply duct 10 therein. ) And a plurality of exhaust passages 39 adjacent to the air supply passage 37 and communicating with the exhaust duct 20.

Although not separately shown in the drawings, a heat exchange plate having excellent heat conduction efficiency is provided at the boundary between the air supply passage 37 and the exhaust passage 39.

At this time, the portion shown by the solid line is the air supply passage 37, and the portion shown by the dotted line is the exhaust passage 39. The operation of the waste heat recovery ventilator having such a configuration is as follows.

First, when indoor air is contaminated to some extent, power is supplied to the exhaust fan 25 so that indoor air flows into the exhaust duct 20 through the exhaust inlet 21, and then the exhaust passage 39 of the heat exchanger 30. ) Is discharged to the outside through the exhaust outlet (23).

At the same time, while supplying power to the air supply fan 15, fresh outdoor air flows into the air supply duct 10 through the air supply inlet 11, and then passes through the air supply passage 37 of the heat exchanger 30. 13) is introduced into the room.

At this time, the indoor air and the outdoor air passing through the heat exchanger 30 will exchange heat through the heat exchange plate. In detail, the heat exchange in the heat exchanger 30 includes the sensible heat exchange between the supplied outdoor air and the exhausted indoor air, and the hot air in the indoor air or the outdoor air is below the dew point temp. It is made by the latent heat exchange by the condensate produced in the state of.

In the case of the heat exchange type ventilation device, the outdoor air supplied when the room is cooled or heated is primarily heat-exchanged with the indoor air and then introduced into the room, thereby preventing a rapid rise or fall of the room temperature.

However, the conventional waste heat recovery ventilator is configured by adopting one of the heating element or the sensible element. The waste heat recovery ventilator using the heat transfer element has high humidity in the process of sensible heat exchange, which is a temperature exchange, and latent heat exchange, which is a moisture exchange. Paper, which is a material of a heating element, in summer, has a short life due to high humidity, and thus, it is difficult to control humidity.

In addition, the waste heat recovery ventilator using the sensible heat element has the advantage of reducing the high humidity, but there is a problem that the heat exchange efficiency is lower than the sensible heat exchange and the latent heat exchange element is made only sensible heat exchange, which is a temperature exchange.

In order to solve the above problems, it is an object of the present invention to provide a waste heat recovery ventilator capable of effectively removing high humidity, and to increase the efficiency during heat exchange.

In order to achieve the above object, the present invention provides an air supply duct for sucking air from the outside to be supplied to the room and an exhaust duct for sucking air from the room to be discharged to the outdoor area by partitioning the air supply duct and A waste heat recovery ventilator for heat-exchanging air sucked into an exhaust duct, the waste heat recovery ventilator comprising: a first heat exchanger configured to perform primary heat exchange between the air inside the air supply duct and the indoor air; A second heat exchanger configured to perform a second heat exchange between the air primarily heat-exchanged in the first heat exchanger and the outdoor air; A temperature sensor detecting a temperature of outdoor air sucked into the second heat exchanger; A controller for outputting a control signal to bypass the indoor air to the second heat exchange part according to the temperature detected by the temperature sensor; And a bypass damper for allowing the indoor air to flow into the second heat exchange part according to the bypass control signal output from the controller.

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In addition, the first heat exchange unit is characterized in that the sensible heat exchange and latent heat exchange is performed, preferably, the first heat exchange unit is a heat transfer element.

In addition, the second heat exchange unit is characterized in that the sensible heat exchange is performed, preferably, the second heat exchange unit is a sensible heat element.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

2 is a cross-sectional view showing the configuration of the waste heat recovery ventilator according to the present invention, Figure 3 is a block diagram showing the configuration of the waste heat recovery ventilator of Figure 2, Figure 4 is an operating state of the waste heat recovery ventilator of Figure 2 It is sectional drawing shown.

2 to 4, the waste heat recovery ventilator includes a first exhaust duct part 110a, a second exhaust duct part 110b, and a first exhaust duct part 110 to suck air from the room into the rectangular case 100 and exhaust the air to the outside. An exhaust duct divided into three exhaust duct parts 110c, a first air supply duct part 120a, a second air supply duct part 120b, and a third air supply duct part 120c to suck air from the outside and supply air to the room And a first heat exchanger 300 and a second heat exchanger 310 for heat-exchanging the air duct, which is divided into the air duct, the air sucked into the exhaust duct and the air duct.

The case 100 allows the first to third exhaust duct portions 110a to 110b and the first to third air supply duct portions 120a to 120c to be partitioned by using a plurality of partitions.

That is, the first exhaust duct unit 110a and the third air supply duct unit 120c are partitioned through the first partition wall 150, and the first exhaust duct unit 110a and the second air supply unit are partitioned through the second partition wall 151. It is partitioned into the duct part 120b.

In addition, the second exhaust duct part 110b and the third air supply duct part 120c are partitioned through the third partition 152, and the second exhaust duct part 110b and the second exhaust duct part 110c are separated through the fourth partition 153. It is partitioned into the air supply duct part 120b.

In addition, the second exhaust duct part 110b and the first air supply duct part 120a are partitioned through the fifth partition wall 154, and the second air supply duct part 120b and the third hole are partitioned through the sixth partition wall 155. The exhaust duct part 110c is partitioned, and the third exhaust duct part 110c and the first air supply duct part 120a are partitioned through the seventh partition wall 156.

Meanwhile, the first heat exchange part 300 is installed at a position where the first and second exhaust duct parts 110a and 110b and the second and third air supply duct parts 120b and 120c intersect, and the second and third parts are provided. The second heat exchange part 310 is installed between the exhaust duct parts 110b and 110c and the first and second air supply duct parts 120a and 120b.

Therefore, the indoor air is sucked into the first exhaust duct part 110a by the exhaust fan 200 installed in the first exhaust duct part 110a through the exhaust inlet 130 installed at one side of the first exhaust duct part 110a. In addition, the sucked indoor air is moved to the first heat exchange part 300, the second exhaust duct part 110b, the second heat exchange part 310, and the third exhaust duct part 110c so that the third exhaust duct part is moved. It is to be exhausted to the outside through the exhaust port 131 installed on one side of (110c).

In addition, the air supply fan 210 installed in the third air supply duct unit 120c sucks outdoor air into the first air supply duct unit 120a through the air supply unit 140 installed at one side of the first air supply duct unit 120a. The suctioned outdoor air is moved to the second heat exchange part 310, the second air supply duct part 120b, the first heat exchange part 300, and the third air supply duct part 120c so as to move to the third air supply duct. Through the air supply outlet 141 installed on one side of the portion (120c) to be supplied to the room.

In this case, the first heat exchanger 300 and the second heat exchanger 310 generate heat exchange between the sucked outdoor air and the indoor air.

The first heat exchange part 300 includes a third air supply duct part (b) in the second air supply duct part (120b) in the process of moving the indoor air sucked into the first exhaust duct part (110a) to the second exhaust duct part (110b). The outdoor air moving to 120c is subjected to sensible heat exchange and latent heat exchange. Preferably, the first heat exchanger 300 uses a known heat transfer element constructed of paper as a heat transfer element.

The second heat exchange part 310 is a third exhaust duct part (3) from the second exhaust duct part 110b in the process of moving the outdoor air sucked into the first air supply duct part 120a to the second air supply duct part 120b. The outdoor air moving to 110c is performed only by sensible heat exchange, and preferably, the second heat exchange part 310 uses a known sensible heat element configured by using a metal or plastic material as the sensible heat element.

On the other hand, since only the sensible heat exchange is performed in the second heat exchange part 310, much of the humidity is removed in the heat exchange process. Therefore, the lower portion of the second heat exchanger 310 is provided with a drain (not shown) to collect the condensate generated due to humidity and discharge it to the outside, but in summer, the condensate is discharged to the outside, but the external temperature is not a problem. In the low winter season, the amount of air sucked by the condensed water is frozen on the surface of the second heat exchange part 311 on the side of the first air supply duct part 120a.

Therefore, in order to prevent this, the temperature of the outdoor air sucked into the bypass damper 400 and the first air supply duct unit 120a to allow the hot indoor air to be bypassed directly to the first air supply duct unit 120a in winter. It further includes a temperature sensor 500 for detecting the control unit 600 for controlling the operation of the bypass damper (400).

The bypass damper 400 is rotatably installed around the hinge shaft 410 on one side partition wall 157 of the case 100, and according to the bypass control signal output from the controller 600, the first air supply duct part It is opened and closed so that the interior 120a can directly communicate with the interior.

The temperature sensor 500 is installed inside the first air supply duct part 120a to detect a temperature of outdoor air sucked from the air supply unit 140, and outputs the detected temperature value to the controller 600.

The controller 600 compares the outdoor temperature detected by the temperature sensor 500 with a reference temperature for determining whether the bypass damper 400 is opened or closed, and according to the comparison result, the indoor air is supplied to the first air supply duct unit 120a. Outputs an open control signal of the bypass damper 400 or outputs a close control signal of the bypass damper 400 so as to bypass the second heat exchanger 310 through.

That is, the controller 600 compares the outdoor temperature detected by the temperature sensor 500 with the reference temperature for the open / close determination of the bypass damper 400, and the detected temperature is lower than the reference temperature (for example, -0 ° C.). In this case, the open control signal is output to the bypass damper 400.

Therefore, by allowing the indoor hot air to flow into the first air supply duct part 120a, the condensed water generated on the surface 311 of the second heat exchange part by mixing with cold outdoor air can be prevented from freezing. .

Therefore, by installing a heat exchanger that performs only sensible heat exchange and a heat exchanger that performs sensible heat exchange and latent heat exchange in the waste heat recovery ventilator, it is possible to prevent shortening of the life of the heat exchanger due to humidity and further increase heat exchange efficiency.

As described above, the present invention has an advantage in that the heat exchanger capable of sensible heat exchange and sensible heat and latent heat exchange is installed in the waste heat recovery ventilator, respectively, to extend the life of the heat exchanger due to moisture and to significantly improve the heat exchange efficiency.

In addition, the present invention has the advantage of preventing the life of the heat exchanger to perform the sensible and latent heat exchange due to the high humidity of the summer, by sufficiently removing the humidity in the heat exchanger performing the sensible heat exchange.

In addition, the present invention has the advantage of preventing the condensation water generated on the surface of the heat exchanger freezing due to the temperature difference between the outdoor air and the indoor air in winter.

Claims (4)

An air supply duct for sucking air from the outside to be supplied to the room and an exhaust duct for sucking air from the room to be discharged to the outside are partitioned by partition walls, and the waste heat for heat exchange of the air sucked into the air supply duct and the exhaust duct. In the recovery ventilator, A first heat exchanger configured to perform a primary heat exchange between the air inside the air supply duct and the indoor air; And A second heat exchanger configured to perform a second heat exchange between the air primarily heat-exchanged in the first heat exchanger and the outdoor air; A temperature sensor detecting a temperature of outdoor air sucked into the second heat exchanger; A controller for outputting a control signal to bypass the indoor air to the second heat exchange part according to the temperature detected by the temperature sensor; And And a bypass damper for allowing the indoor air to flow into the second heat exchange part in accordance with a bypass control signal output from the controller. delete The method of claim 1, The first heat exchanger is a waste heat recovery ventilator having a plurality of heat exchanger, characterized in that the heat transfer element is a sensible heat exchange and latent heat exchange. The method of claim 1, The second heat exchanger is a waste heat recovery ventilator having a plurality of heat exchanger, characterized in that the sensible heat exchange is performed.

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