KR20180055383A - Heat exchanger - Google Patents

Abstract

The present invention relates to a heat exchanger, which comprises: a container of which side surfaces have an outdoor air inflow hole and an outdoor air discharge hole through which outdoor air can come in and out and an indoor air inflow hole and an indoor air discharge hole through which indoor air can come in and out, and of which an inner space is separated by a plurality of partition walls; and a plurality of heating elements stored inside the hull and allowing the coming in and out outdoor air and indoor air to pass through the heating elements while crossing each other so as to perform heat exchange. Moreover, adjacent side surfaces of the neighboring heating elements do not face each other. In addition, the heating elements have a predetermined angle range.

Description

Total Heat Exchanger {HEAT EXCHANGER}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an enthalpy heat exchanger for allowing indoor air to be exchanged with each other in a process of discharging indoor air and sucking outdoor air for ventilation of buildings and the like.

The total heat exchanger corresponds to a part of the air conditioning system of the building. The indoor air is discharged to the outside for ventilation and the indoor air and the inhaled outdoor air are heat exchanged It is a device that can reduce the heat loss caused by the ventilation process.

As is known in the art, the conventional total enthalpy heat exchanger has an inlet port through which outdoor air flows in and out, an inlet port and an outlet port through which the outlet and indoor air flow in and out, respectively, and a plurality of partition walls are formed in the interior of the enclosure, The outdoor air flowing through the heat transfer element is discharged to the room through the heat transfer element. At the same time, the room air flows into the interior of the housing through the indoor inlet, and is discharged to the outside through the outlet.

When the indoor air and the outdoor air are heat-exchanged with each other through the heat transfer element as described above, they have a similar temperature, so that heat loss to the indoor air discharged can be minimized. However, the conventional total enthalpy heat exchanger has a problem in that the heat exchange efficiency is low because of the single use of the heating element having the hexahedron shape. As a solution to this problem, the cross-sectional area of the heating element was modified from hexagonal to quadrangular shape to enlarge the area where heat exchange was performed. However, this caused another problem that the material was wasted in the process of manufacturing the heating element.

Korean Registered Patent No. 10-1117523 (Registered on February 10, 2012) Korean Registered Patent No. 10-1217605 (registered on December 26, 2012) Korean Registered Patent No. 10-1190496 (Registered on May 10, 2012) Korean Registered Patent No. 10-1658644 (Registered on September 12, 2016)

An embodiment of the present invention has been devised to solve the above problems, and it is an object of the present invention to provide an overall heat exchanger capable of improving heat exchange efficiency between outdoor air and indoor air.

It is another object of the present invention to provide an electric heat exchanger capable of quickly ventilating indoor air by directly discharging outdoor air and indoor air without passing through a heating element while maintaining the volume of the total enthalpy heat exchanger.

In order to solve the above-described problems, an embodiment of the present invention provides an air conditioner in which outdoor air inlet, outdoor air outlet, indoor air inlet and outdoor air outlet for indoor air flow are formed on side surfaces, respectively, Split enclosure; And a heating element which is accommodated in an inner space of the housing and through which outdoor air and indoor air flow in and out to cross each other and perform heat exchange, wherein a plurality of the heating elements are disposed, There is provided an total enthalpy heat exchanger in which adjacent side surfaces of the adjacent heating elements are not opposed to each other and have a predetermined angular range.

Between adjacent side surfaces of the adjacent heating elements, a hollow space flow path connecting the side surfaces can be formed.

The empty space passage portion may be formed by a first partition wall that closes a space formed by adjacent side surfaces of the adjacent heating element.

The heating element may have a hexahedral shape, and the heating elements may be disposed such that adjacent side surfaces of the adjacent heating elements are orthogonal to each other.

Wherein the outside air inlet and the outside air outlet are disposed on one side of the housing, the inside air inlet and the outside air outlet are disposed on another side of the housing, and the housing is connected to the outside air inlet and the outside air outlet An outside air bypass flow path and an internal bypass flow path connecting the inside air inlet and the inside air outlet, respectively.

The outside air bypass passage and the inside-air bypass passage may be formed by a second partition wall facing the inner side surface of the housing.

And an opening / closing member for opening / closing the respective flow paths may be disposed in the outside air bypass passage and the inside-air bypass passage.

The opening / closing member may be an electric damper whose opening and closing amount is controlled by an electric motor.

The outside air outlet and the inside air outlet may be further provided with an intake / exhaust fan.

As described above, according to the present invention, various effects including the following can be expected. However, the present invention does not necessarily achieve the following effects.

The total enthalpy heat exchanger according to one embodiment can heat exchange a plurality of times by using a plurality of conventional heat transfer elements connected to each other, thereby remarkably improving the heat exchange efficiency. Further, heat exchange is performed again through the empty space channel formed between the heating elements while connecting the heating elements, which is more efficient.

Also, since the outdoor air and the room air can be discharged through the bypass flow path having the minimum travel distance without passing through the heating element while maintaining the volume of the total enthalpy heat exchanger, indoor air can be quickly ventilated.

1 is a perspective view illustrating an entire enthalpy heat exchanger according to an embodiment of the present invention;
FIG. 2 is a plan view schematically showing the interior of the total enthalpy heat exchanger of FIG. 1; FIG.
FIG. 3 is a schematic view showing that heat exchange is performed while indoor air and outdoor air are moved through the heating element shown in FIG. 2. FIG.
FIG. 4 is an operation diagram showing that outdoor air and indoor air are bypassed through the outdoor air bypass flow path and the indoor air bypass flow path shown in FIG. 2;

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

2 is a plan view schematically illustrating the interior of the total enthalpy heat exchanger of FIG. 1, and FIG. 3 is a cross-sectional view of the total enthalpy heat exchanger shown in FIG. FIG. 4 is a schematic view showing that outdoor air and indoor air are bypassed through the outdoor air bypass flow path and the indoor air bypass flow path shown in FIG. 2 .

1 to 4, the total enthalpy heat exchanger includes an enclosure 10, a heating element 20, an empty space passage portion 30, an outside air bypass passage 42, an internal bypass passage 44, 48, and an intake and exhaust fan 50.

The housing 10 corresponds to the case of the total enthalpy heat exchanger. The housing 10 may be formed by assembling an upper case and a lower case together. The enclosure (10) is formed with an outside air inlet (11) and an outside air outlet (12) through which outdoor air flows, respectively. In addition, the enclosure 10 is formed with the inside air inlet 13 and the inside air outlet 14 through which indoor air flows in and out, respectively.

Further, the inner space of the housing 10 is divided by a plurality of partition walls. A central region where the heat transfer element 20 is disposed is formed in the housing 10 by a plurality of partitions. In addition, a plurality of cutouts (not shown) may be further formed on the side surface of the housing 10.

In this case, the heat transfer element 20 communicating with the outside air inlet 11, the outside air outlet 12, the inside air inlet 13 and the inside air outlet 14 described above is disposed in the central region, And the room air discharged to the outside through the room air outlet (14) cross each other inside the heat transfer element (20) to perform heat exchange. The heating element 20 is accommodated in a central region of the inner space of the housing 10, and allows the outdoor air and the indoor air to flow therethrough.

A check port (not shown) is formed on the lower surface of the housing 10 on which the heating element 20 is disposed, which is cut in the same shape as the cross section of the heating element 20 so that the heating element 20 can be replaced have. The check port includes an opening / closing cover (not shown) for opening / closing the check port so that the heating element 20 can be replaced, and a bolt fastened to each vertex area of the opening / closing cover so that the opening / closing cover can be detachably attached to the enclosure 10 .

The enclosure 10 is provided with an outside air bypass passage 42 for connecting between the outside air inlet 11 and the outside air outlet 12 and an inside bypass flow passage 42 for connecting between the inside air inlet 13 and the inside air outlet 14 44 are formed. The outdoor air and the room air can be directly transferred to the outdoor air outlet 12 or the indoor air outlet 14 without passing through the heat transfer element 20 through the bypass flow path. This prevents the loss of driving power of the intake and exhaust fan 50 when the temperature difference between the indoor and the outdoor is small.

That is, the outdoor air flowing through the outdoor air inlet 11 flows out to the indoor side through the outdoor air outlet 12. The indoor air flowing through the indoor air inlet 13 flows out to the outside through the indoor air outlet 14 immediately.

Specifically, the outside-air bypass flow path 42 and the inside-air bypass flow path 44 are formed by the second partition 46 facing the inner surface of the housing 10, respectively. The second partition 46 is preferably a plate-like member disposed at a certain distance from the inner surface of the housing 10, and is formed of a material such as a synthetic resin having a low heat transfer rate.

On the other hand, an open / close member 48 for opening and closing the respective flow paths is disposed in the outside-air bypass flow path 42 and the inside-air bypass flow path 44. The opening / closing member 48 according to an embodiment is preferably an electric damper whose opening and closing amount is controlled by an electric motor. The opening / closing member 48 may be installed directly to the outside air bypass flow path 42 and the inside air bypass flow path 44.

Here, the bypass can be operated only at one of the outdoor air and the indoor air or at the same time. When the bypass is activated, the electric damper is opened. However, the amount of opening and closing of the electric damper disposed in each bypass passage can be variably controlled depending on the flow rate to be bypassed.

On the other hand, the internal bypass passage 44 adjacent to the internal inlet 13 may further include an internal connection passage (not shown) for interconnecting the internal inlet 13 and the internal bypass passage 44 with each other. The outside air bypass passage 42 adjacent to the outside air inlet 11 may further include an outside air connecting passage (not shown) for interconnecting the outside air inlet 11 and the outside air bypass passage 42 with each other. The connecting flow path enables the bypassed outdoor air or room air to be accurately transferred through the bypass flow path without flowing out to another place during the bypass mode operation. Specifically, the inner connection channel and the outer channel connection channel may be formed of a curved plate or the like formed of a material such as synthetic resin.

A plurality of heat transfer elements 20 according to an embodiment are disposed in the inner space of the housing 10 at the time when the adjacent heat transfer elements 20 are not opposed to each other, And is arranged to have a predetermined angular range.

Specifically, the heating element 20 has a shape generally in a hexahedron. As a result, the cross section of the heat transfer element 20 is generally formed as a square. According to one embodiment, the plurality of heating elements 20 are connected in series so that at least two or more of them are adjacent to each other. For example, the heating element 20 may be arranged in a line with the first heating elements and the second heating elements in order. As a result, the outdoor air or the room air can perform heat exchange a plurality of times while passing through the first heating element and the second heating element, respectively.

At this time, the heating elements 20 are arranged such that adjacent side surfaces of the neighboring heating elements 20 have predetermined angular ranges, for example, the side surfaces may be arranged to be orthogonal to each other. As a result, an empty space flow path portion 30 connecting between the respective side surfaces may be formed between adjacent side surfaces of the neighboring heat transfer elements 20. [

Two empty space conduits 30 are formed between neighboring heating elements 20. That is, the outdoor air or the room air flowing out after the heat exchange through the heat transfer element 20 flows along the empty space flow passage portion 30 corresponding to the connection passage before flowing into the neighboring heat transfer element 20 .

Specifically, the hollow space flow path portion 30 is formed by a first partition 32 closing a space formed by adjacent side surfaces of the adjacent heat transfer elements 20. [ The first partition 32 is formed by at least one plate combination. As described above, the heating element 20 can be arranged so that adjacent side surfaces of the adjacent heating element 20 are orthogonal to each other. As a result, adjacent side surfaces of the neighboring heating elements 20 form a space having a triangular cross-section therebetween.

For example, when the indoor air flows into the heat transfer element 20 communicating directly with the exhaust inlet 13 and is heat-exchanged and then flows out of the heat transfer element 20 and flows into the empty space flow path portion 30, The heat exchange with the empty space flow path portion 30 can be performed due to the temperature difference generated between the empty space flow path portions 30. This is the same for the empty space passage portion 30 through which outdoor air flows.

On the other hand, when the heating elements 20 are arranged in an even number, such as two or four, the outside air inlet 11 and the outside air outlet 12 are provided on either side of the housing 10 And the exhaust inlet 13 and the exhaust outlet 14 are also disposed on the other side of the enclosure 10, unlike those conventionally arranged in the diagonal direction. At this time, the outside air inlet 11 and the inside air inlet 13 are arranged in a mutually diagonal direction. Also, the outside air outlet 12 and the inside air outlet 14 are also arranged in a mutually diagonal direction.

The outer air inlet 11 and the outer air outlet 12 are arranged in the mutually diagonal direction of the housing 10 as in the conventional case and the air inlet 13 and the exhaust outlet 14 are also arranged in the mutual diagonal direction of the housing 10.

Further, the outside air outlet 12 and the inside air outlet 14 are further provided with an intake and exhaust fan 50. The intake and exhaust fan 50 installed in the exhaust outlet 14 allows the indoor air introduced through the exhaust inlet 13 to be forced out of the room through the exhaust outlet 14. In addition, the intake and exhaust fan 50 disposed at the outside air outlet 12 forces the outdoor air introduced through the outside air inlet 11 to be forced out through the outside air outlet 12 to the room. The intake and exhaust fan 50 can also be installed in the exhaust outlet 14 and the exhaust inlet 13.

As described above, even if the intake / exhaust fan 50 is provided only at one of the outlets or the outlets on both sides, the outdoor air and the room air can be sufficiently flowed, so that the total weight of the total heat exchanger can be reduced and an internal space can be secured.

Hereinafter, a method of operating the total enthalpy heat exchanger according to an embodiment of the present invention will be described. The total heat exchanger has a heat transfer mode and a bypass mode. First, when the total enthalpy heat exchanger is operated in the heat transfer mode, the room air flowing into the heating element 20 through the enclosure 10 through the exhaust inlet 13 passes through the enclosure 10 through the outside air inlet 11, Heat exchange is performed while crossing with the outdoor air flowing into the outdoor heat exchanger 20. As a result, the temperature of the outdoor air rises.

For example, when two heating elements 20 are disposed, that is, when the first heating element and the second heating element are included, heat exchange is performed in two steps. Specifically, the one-step heat exchange of the outdoor air introduced into the first heating element through the outside air inlet 11 is carried out between the indoor air already heat-exchanged in the second heating element. Then, the outdoor air is introduced into the second heating element through the hollow space flow path portion 30, and performs a two-stage heat exchange with the indoor air introduced through the exhaust inlet 13 in the second heating element. That is, the total enthalpy heat exchanger according to one embodiment can improve the overall efficiency through heat exchange over two stages.

However, in the bypass mode, that is, when the indoor air is directly discharged outdoors without driving the heating element 20, ventilation is performed as follows. As described above, in the total enthalpy heat exchanger according to the embodiment, the outside air bypass flow passage 42 and the inside air bypass flow passage 44 are formed. In the bypass mode, either one of the outside-air bypass flow passage 42 and the inside-air bypass flow passage 44 can be selectively used, or both of them can be used.

At this time, the opening and closing member 48 disposed in the bypass passage is opened. For example, when only the outside air bypass passage 42 is used, the opening / closing member 48 disposed in the inside-air bypass passage 44 is closed and the opening / closing member 48 are in the open state, and the intake and exhaust fan 50 installed at the outside air outlet 12 is driven.

As a result, the indoor air introduced from the indoor air inlet 13 can be discharged to the outside through the indoor air outlet port 14 through the indoor air flow path 44 connected to the enclosure 10. In the same manner, the outdoor air introduced from the outdoor air inlet 11 can be discharged to the room through the outdoor air outlet passage 12 through the outdoor air bypass passage 42 through the outdoor air connection passage connected to the enclosure 10.

As described above, the total enthalpy heat exchanger having the outside-air bypass flow path 42 and the inside-air bypass flow path 44 can effectively ventilate room air efficiently while maintaining the volume of the housing 10 as it is.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.

10: Housing 20: Heating element
30: empty space flow path portion 32: first partition wall
42: outside air bypass flow channel 44: bet bypass flow channel
46: second partition 48: opening / closing member
50: Suction / exhaust fan 11: Outer air inlet
12: outside air outlet 13: bet entrance
14: Betting exit

Claims (9)

An enclosure in which an external air inlet and an outdoor air inlet and an outdoor air outlet, an indoor air inlet and an indoor air outlet through which indoor air flows in and out are respectively formed on the side and an internal space is divided by a plurality of partition walls; And a heating element which is accommodated in an inner space of the housing and in which outdoor air flowing in and out and indoor air pass through each other to perform heat exchange,
Wherein the plurality of heat transfer elements are disposed such that adjacent side surfaces of the adjacent heat transfer elements do not face each other but have a predetermined angular range.
The method according to claim 1,
And an empty space flow path portion connecting between the respective side surfaces is formed between adjacent side surfaces of the neighboring heating elements.
3. The method of claim 2,
Wherein the empty space passage portion is formed by a first partition wall that closes a space formed by adjacent side surfaces of the adjacent heat transfer elements.
The method according to claim 1,
Wherein the heating element is in the form of a hexahedron, and the heating element is disposed so that adjacent side surfaces of the adjacent heating element are orthogonal to each other.
The method according to claim 1,
The outside air inlet and the outside air outlet are disposed on one side of the housing,
Wherein the inside air inlet and the outside air outlet are disposed on another side of the enclosure,
Wherein the enclosure is formed with an outside air bypass flow path for connecting the outside air inlet and the outside air outlet, and an internal bypass flow path for connecting between the inside air inlet and the inside air outlet.
6. The method of claim 5,
Wherein the outside-air bypass flow path and the inside-air bypass flow path are formed by second partition walls opposing the inner side surfaces of the housing.
6. The method of claim 5,
Wherein an open / close member for opening / closing each flow path is disposed in the outside air bypass flow path and the inside-air bypass flow path.
8. The method of claim 7,
Wherein the opening / closing member is an electric damper that is controlled by an electric motor
The method according to claim 1,
Wherein the outdoor air outlet and the outdoor air outlet are further provided with an intake / exhaust fan.

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