KR20210129339A - Heat exchanger having the shape of passage for improving heat exchange efficency - Google Patents

Abstract

The present invention relates to a total heat exchanger having a shape of a flow passage for improving heat exchanging efficiency. More specifically, a blockage wall having a shape protruding in both directions of an air supply flow passage and an air exhaust flow passage is formed at a position coming in contact with an edge of an upper end of an electric heating element to form a section where a cross-section of the flow passage is rapidly reduced in the air supply flow passage and the air exhaust flow passage, thereby generating a change of flow directions of indoor air and outdoor air caused by a pressure difference due to a change of the cross-section of the flow passage. Accordingly, the indoor air and the outdoor air flow over an entire area of each electric heating element to exchange heat with each other, thereby improving heat exchanging efficiency.

Description

A total heat exchanger having a flow path to improve heat exchange efficiency

The present invention relates to a total heat exchanger having a flow path shape for improving heat exchange efficiency, and more particularly, by forming a barrier wall protruding in both directions from an air supply flow path and an exhaust flow path at a position in contact with the upper edge of the heat transfer element, By forming a section in the exhaust flow path in which the flow passage cross-sectional area is rapidly reduced, the flow direction of the bet and the outside air is changed due to the pressure difference according to the change of the flow passage cross-sectional area, so that the outside air and the outside air flow over the entire area of the heat transfer element, respectively, and heat exchange It relates to a total heat exchanger that can improve heat exchange efficiency by performing

In general, a total heat exchanger is a device that transfers the enthalpy of exhaust air to intake air by passing supply air and exhaust air through a heat exchanger in order to improve indoor air quality and energy efficiency in a situation where indoor air conditioning is maintained.

That is, a general total heat exchanger is a device that first exchanges outdoor air with indoor air discharged to the outdoors so that sudden cold and hot air do not flow into the interior when ventilating the indoor air.

Therefore, the total heat exchanger discharges the volatile organic compounds generated in the room through exhaust, and maintains the indoor air comfortably by sucking the filtered fresh air into the room.

Therefore, when explaining the operation of a general total heat exchanger, when exhausting the air from the conditioned room to the outside, the exhaust fan installed in the total heat exchanger operates, and at this time, the air polluted from the indoor to the outdoor is removed while passing through the total heat exchanger element at the positive pressure. discharged to the outside

Conversely, when the air supply fan installed in the total heat exchanger operates, air is sucked into the room while passing through the total heat exchanger element from the outside with a static pressure generated.

Such a conventional total heat exchanger has a problem in that heat exchange efficiency is lowered because indoor and outdoor air flows only through a partial area of the total area of the heat transfer element to perform heat exchange.

On the other hand, as a prior art related to a total heat exchanger, there is Korean Patent Laid-Open No. 10-2010-0056382.

The present invention is to solve the above-mentioned problems, by forming a blocking wall in the shape of protruding in both directions of the supply and exhaust passages at the position in contact with the upper edge of the heating element, the flow passage cross-sectional area is rapidly reduced in the supply and exhaust passages. By forming a section, heat exchange efficiency can be improved by generating a change in the flow direction of the outside air and the outside air due to the pressure difference according to the change of the flow path cross-sectional area, so that the outside air and the outside air flow over the entire area of the heat transfer element, respectively. It aims to provide a total heat exchanger with

The problems to be solved by the present invention are not limited to the above problems, and other technical problems not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description.

A total heat exchanger having a flow path shape for improving heat exchange efficiency according to the present invention for achieving the above object includes: a heat transfer element having first and second cross-type flow paths; an air supply passage connected to the first crossed flow passage; an exhaust passage connected to the second cross-type passage; an air supply fan for discharging outdoor air to the indoor through the first crossed flow passage and the air supply passage; an exhaust fan for discharging indoor air to the outdoors through the second crossed flow passage and the exhaust passage; and a blocking wall formed at an upper edge of the heating element in a shape protruding in both directions of the air supply passage and the exhaust passage.

At this time, the blocking wall forms a section in which the cross-sectional area of the flow passage is reduced in the air supply passage and the exhaust passage to generate a change in the flow direction of indoor and outdoor air, so that indoor and outdoor air flows through the entire area of the heating element It is characterized in that it performs heat exchange while doing.

In addition, the outdoor air intake of the total heat exchanger, the filter for filtering out foreign substances in the outdoor air introduced through the outdoor air intake; and a backflow prevention wing that prevents the air inside the total heat exchanger from flowing back to the outside through the outdoor air intake port.

The total heat exchanger having a flow path shape for improving heat exchange efficiency according to the present invention forms a barrier wall protruding in both directions from the supply air flow path and the exhaust flow path at the position in contact with the upper edge of the heat transfer element, so that the flow path cross-sectional area is in the supply air flow path and the exhaust flow path. By forming a section that is rapidly reduced, a change in the flow direction of the outside air and the outside air is generated due to the pressure difference according to the change of the flow path cross-sectional area, so that the outside air and the outside air flow over the entire area of the heat transfer element to perform heat exchange, respectively, and heat exchange efficiency can improve

Specifically, in the conventional total heat exchanger, the flow passage cross-sectional area of the supply and exhaust passages is formed to be almost constant. There was a problem that heat exchange efficiency was lowered because heat exchange between the outside and the inside was performed only in a partial area of the total area of the heat transfer element due to concentrated flow only through the central region). A barrier wall with a protruding shape is formed, but the barrier wall is formed at the upper edge of the heating element installed in a diamond shape to form a section in which the flow passage cross-sectional area is rapidly reduced in the air supply and exhaust passages. As a result, the flow direction of the bet and the outside air flowing into the alternating flow path of the heating element is changed by the That is, it is possible to improve heat exchange efficiency by performing heat exchange while flowing over the entire area of the heat transfer element.

Effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a right side perspective view of a total heat exchanger having a flow path shape for improving heat exchange efficiency according to a preferred embodiment of the present invention.
2 is a left side perspective view of a total heat exchanger having a flow path shape for improving heat exchange efficiency according to a preferred embodiment of the present invention.
3 is a front view of a total heat exchanger having a flow path shape for improving heat exchange efficiency according to a preferred embodiment of the present invention.
4 is a partially enlarged view of a total heat exchanger having a flow path shape for improving heat exchange efficiency according to a preferred embodiment of the present invention.
5 is a perspective view of a heat transfer element included in a total heat exchanger having a flow path shape for improving heat exchange efficiency according to a preferred embodiment of the present invention.
6 is a view showing the flow flow of the outside air and the inside in a total heat exchanger having a flow path shape for improving heat exchange efficiency according to a preferred embodiment of the present invention.
7 is a view showing a flow path divided by a barrier wall in a total heat exchanger having a flow path shape for improving heat exchange efficiency according to a preferred embodiment of the present invention.
8 is a schematic diagram illustrating a flow path shape of a total heat exchanger having a flow path shape for improving heat exchange efficiency according to another preferred embodiment of the present invention.

A preferred embodiment of the present invention will be described in more detail with reference to the accompanying drawings, but already known technical parts will be omitted or compressed for the sake of brevity of description.

Hereinafter, a total heat exchanger having a flow path shape for improving heat exchange efficiency according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a right side perspective view of a total heat exchanger having a flow path shape for improving heat exchange efficiency according to a preferred embodiment of the present invention, and FIG. 2 is a total heat exchanger having a flow path shape for improving heat exchange efficiency according to a preferred embodiment of the present invention. It is a left side perspective view, and FIG. 3 is a front view of a total heat exchanger having a flow path shape for improving heat exchange efficiency according to a preferred embodiment of the present invention, and FIG. 4 is a flow path shape for improving heat exchange efficiency according to a preferred embodiment of the present invention. 5 is a perspective view of a heat transfer element included in a total heat exchanger having a flow path shape for improving heat exchange efficiency according to a preferred embodiment of the present invention, and FIG. It is a view showing the flow flow of outside air and inside air in a total heat exchanger having a flow path shape for improving heat exchange efficiency according to the present invention. It is a view showing a flow path divided by a wall.

1 to 7, a heat transfer element 110 is provided inside the total heat exchanger 100 (hereinafter referred to as 'total heat exchanger') having a flow path shape for improving heat exchange efficiency according to a preferred embodiment of the present invention. It is coupled in a rhombus shape, and the heat transfer element 100 has a first crossed flow path 111a through which outside air passes and a second crossed flow path through which outside air passes so that heat exchange can be performed without mixing the outside air and the bet with each other. (111b) is stacked up and down.

In addition, the first crossed flow path 111a through which the outdoor air passes is connected to the air supply flow path 140 for guiding the outdoor air into the room, and the second crossed flow path 111b through which the bet passes is an exhaust for guiding the bet to the outside. It is connected to the flow path 150, and an air supply fan 141 and an exhaust fan 151 for generating blowing force are respectively disposed in the supply flow path 140 and the exhaust flow path 150, and the supply fan 141 and the exhaust fan ( 151), the outside air and the bet air flow along the first crossed flow passage 111a, the supply air passage 140, and the second crossed flow passage 111b and the exhaust passage 150, respectively, so that the ventilation of the room is made.

At the lower end of the total heat exchanger 100 , the indoor air intake 130 and outdoor air intake 120 are formed, and at the upper end of the total heat exchanger 100 , the outdoor air is discharged into the room. (121) and a bet outlet 131 through which the indoor air is discharged to the outdoors is formed. At this time, the outdoor air intake 120 and the outdoor air outlet 121 are connected by a first crossed flow passage 111a and an air supply passage 140, and the inner intake 130 and the inner air outlet 131 are the second crossed flow passages. (111b) and the exhaust passage 150, the heat transfer element 110 is installed inside the total heat exchanger 100 in a rhombus shape, the left and right corners of the heat transfer element 110 are in contact with the partition wall 161. All spaces other than the first and second crossed flow passages 111a and 111b are closed so that the indoor and outdoor air introduced through the outdoor air intake 120 and the bet intake 130 is transferred to the first and second crossed flow passages 111a and 111b. to flow only through In addition, at a position in contact with the upper edge of the heating element 110, a blocking wall 160 having a shape protruding in both directions of the air supply flow path 140 and the exhaust flow path 150 is formed, and the air supply flow path ( 140) and the exhaust passage 150, a section in which the cross-sectional area is rapidly reduced is formed, and the flow direction of the bet and the outdoor air is changed as shown in FIG. 6 due to the pressure difference according to the change of the flow passage cross-sectional area The heat exchange efficiency is improved by performing heat exchange while flowing over the entire area of the heat transfer element 110, respectively.

In addition, as the heating element 110 is installed in a rhombus shape, as shown in FIG. 7 , a flow path far away from the air supply fan 141 (① in FIG. 7 ) and a short flow path (② in FIG. 7 ) are formed. However, in the case of a distant flow path (① in FIG. 7), it is far from the air supply fan 141, so the intensity of sucking air inside the flow path is low, so the flow speed of the air is low. There is no obstruction that prevents the flow of the air, so the flow speed of the air is maintained as it is, and in the case of a short flow path (② in FIG. While the flow rate is high, a space blocked in the flow path by the protruding blocking wall 160 occurs, and air has to flow by bypassing the blocked space by the blocking wall 160. The flow rate is reduced. Accordingly, in the case of a long flow path (① in FIG. 7), the suction strength of the supply fan 141 is low, so even if the air flow speed is low, the air flows through the straight flow path and flows without any obstruction, maintaining the flow speed as it is. In the case of a close-distance flow path (② in FIG. 7 ), the suction strength of the supply fan 141 is high, so the air flow speed is high, but as it flows by bypassing the space blocked by the blocking wall 160 , the air flow speed decreases As a result, the flow velocity of the air flowing through the distant passage (① in FIG. 7) and the short passage (② in FIG. 7) is maintained almost the same, and as a result, the air flows over the entire area of the heating element 110. The heat exchange efficiency is improved by uniformly flowing and performing heat exchange over the entire area of the heat transfer element 110 . In the above description, the supply air flow path 140 was described as a reference, but the same effect is also generated in the exhaust flow path 150 , so that the outdoor air and the indoor air flow uniformly over the entire area of the heat transfer element 110 , and heat exchange is performed by performing heat exchange. efficiency will be improved.

In addition, the backflow prevention wing 120b and the filter 120a are formed in the outdoor air intake 120, and as shown in FIG. 4, the backflow prevention wing 120b is folded at a certain angle only to the inside of the total heat exchanger 100. It is formed to prevent the air present inside the total heat exchanger 100 from flowing backward to the outside through the outdoor air intake 120 . In addition, the filter 120a filters foreign substances in the outdoor air introduced through the outdoor air intake 120, and includes a pre-filter that filters large dust in the air when outdoor air passes, and a dehumidification filter that removes moisture from the outside air. , at least one high-performance HEPA filter for filtering fine dust may be installed.

Hereinafter, with reference to FIGS. 1 to 7 , the operation process of the total heat exchanger 100 having a flow path shape for improving heat exchange efficiency according to a preferred embodiment of the present invention and the effect thereof will be described in detail.

When the air supply fan 141 and the exhaust fan 151 are driven, outdoor air flows into the outdoor air intake 120 by the blowing force of the air supply fan 141 and is filtered while passing through the filter 120a. 110) passes through the first crossed flow path 111a and the supply air flow path 140, and is discharged into the room through the outdoor air outlet 121, and is discharged into the indoor air through the indoor air intake 130 by the blowing force of the exhaust fan 151. After the air is introduced, it passes through the second cross-type flow path 111b and the exhaust flow path 150 of the heating element 110 and is discharged to the outside through the internal exhaust port 131 . At this time, the outdoor air and the indoor air perform heat exchange while passing through the first and second crossed flow passages 111a and 111b of the heat transfer element 110, and in the present invention, the upper edge of the heat transfer element 110 and A section in which the cross-sectional area of the flow passage is rapidly reduced is formed in the air supply passage 140 and the exhaust passage 150 by forming a blocking wall 160 having a shape protruding in both directions of the supply air passage 140 and the exhaust passage 150 at the abutting position. By doing so, as shown in FIG. 6 , a change in the flow direction of the bet and the outside air is generated by the pressure difference according to the change in the flow path cross-sectional area, so that the outside air and the outside air flow over the entire area of the heat transfer element 110 to perform heat exchange, respectively. Thus, heat exchange efficiency can be improved.

In the conventional total heat exchanger, the flow passage cross-sectional area of the supply air and exhaust passages is formed to be almost constant. There was a problem in that heat exchange efficiency between the outside and the inside was performed only in a part of the total area of the heat transfer element, so that the heat exchange efficiency was lowered. 150) A blocking wall 160 of a shape protruding in both directions is formed, but the blocking wall 160 is formed at the upper edge of the heating element 110 installed in a rhombus shape to form the air supply passage 140 and the exhaust passage 150. By forming a section in which the flow path cross-sectional area is rapidly reduced, a change occurs in the flow direction of the bet and the outside air flowing into the crossed flow path 111 of the heating element 110 due to the pressure difference according to the change in the flow path cross-sectional area. is flowed not only near the left and right corners and near the center of the heat transfer element 110, respectively, but also to the upper edge of the heat transfer element 110, that is, heat exchange while flowing over the entire area of the heat transfer element 110 to perform heat exchange that can improve efficiency.

In addition, as the heating element 110 is installed in a rhombus shape, as shown in FIG. 7 , a flow path far away from the air supply fan 141 (① in FIG. 7 ) and a short flow path (② in FIG. 7 ) are formed. However, in the case of a distant flow path (① in FIG. 7), it is far from the air supply fan 141, so the intensity of sucking air inside the flow path is low, so the flow speed of the air is low. There is no obstruction that prevents the flow of the air, so the flow speed of the air is maintained as it is, and in the case of a short flow path (② in FIG. On the other hand, the flow velocity is high, but a space blocked by the blocking wall 160 of the protruding shape is generated, and the air has to flow by bypassing the space blocked by the blocking wall 160, so the flow of air is disturbed. The flow rate is reduced. Accordingly, in the case of a long flow path (① in FIG. 7), the suction strength of the supply fan 141 is low, so even if the air flow speed is low, the air flows through the straight flow path and flows without any obstruction, maintaining the flow speed as it is. In the case of a close-distance flow path (② in FIG. 7 ), the suction strength of the supply fan 141 is high, so the air flow speed is high, but as it flows by bypassing the space blocked by the blocking wall 160 , the air flow speed decreases As a result, the flow velocity of the air flowing through the distant passage (① in FIG. 7) and the short passage (② in FIG. 7) is maintained almost the same, and as a result, the air flows over the entire area of the heating element 110. The heat exchange efficiency is improved by uniformly flowing and performing heat exchange over the entire area of the heat transfer element 110 . In the above description, the supply air flow path 140 was described as a reference, but the same effect is also generated in the exhaust flow path 150 , so that the outdoor air and the indoor air flow uniformly over the entire area of the heat transfer element 110 , and heat exchange is performed by performing heat exchange. efficiency will be improved.

Meanwhile, FIG. 8 is a schematic diagram illustrating a flow path shape of a total heat exchanger having a flow path shape for improving heat exchange efficiency according to another preferred embodiment of the present invention.

As shown in FIG. 8, the total heat exchanger having a flow path shape for improving heat exchange efficiency according to another preferred embodiment of the present invention includes a supply air flow path 140 in which an air supply fan 141 and an exhaust fan 151 are respectively disposed and A section in which the cross-sectional area is abruptly reduced is formed at the upper end of the exhaust passage 150 , and the upper end of the section in which the air supply fan 141 and the exhaust fan 151 are rapidly reduced in cross-sectional area, that is, a point where the cross-sectional area is abruptly reduced It is formed in the portion passing through and generates a change in the flow direction of the outside air and the outside air due to the pressure difference according to the change of the flow path cross-sectional area, so that the outside air and the outside air flow over the entire area of the heat transfer element 110, respectively, and heat exchange to perform heat exchange. efficiency can be improved.

If the air supply fan 141 and the exhaust fan 151 are formed at the lower end of the section where the flow path is abruptly narrowed, that is, in the section before the point where the cross-sectional area is rapidly reduced, a change in the air flow direction occurs according to the change in the flow path cross-sectional area. The air flow is concentrated only in the vicinity of the center where the suction strength of the supply fan 141 and the exhaust fan 151 is high, so that heat exchange between the outside and the inside is performed only in a part of the total area of the heat transfer element (near the center), so that heat exchange efficiency is achieved. However, a section in which the cross-sectional area is rapidly reduced is formed at the upper end of the total heat exchanger supply air passage 140 and the exhaust passage 150 having a flow path shape for improving heat exchange efficiency according to another preferred embodiment of the present invention, The fan 141 and the exhaust fan 151 are installed at the upper end of the section where the cross-sectional area is rapidly reduced, that is, at the part past the point where the cross-sectional area is rapidly reduced, and the air supply fan 141 and the exhaust fan ( 151) passes through the narrow channel and forms a relatively uniform pressure over the entire cross-sectional area in the wide channel, so uniform pressure is formed over the entire area at one end of the total heat exchanger, and as a result, over the entire area of the total heat exchanger The heat exchange efficiency is improved by performing heat exchange while uniform suction is achieved so that outdoor air and indoor air flow uniformly over the entire area of the heat transfer element 110 .

The total heat exchanger having a flow path shape for improving heat exchange efficiency according to the present invention as described above forms a blocking wall protruding in both directions of the supply air flow path and the exhaust flow path at a position in contact with the upper edge of the heat transfer element, and is located in the supply air flow path and the exhaust flow path. By forming a section in which the flow passage cross-sectional area is rapidly reduced, a change in the flow direction of the bet and the outside air occurs due to the pressure difference according to the change in the flow passage cross-sectional area, so that the outside air and the inside air flow over the entire area of the heat transfer element to perform heat exchange. Thus, heat exchange efficiency can be improved.

Specifically, in the conventional total heat exchanger, the flow path cross-sectional area of the supply air and exhaust passages is formed to be almost constant. There was a problem in that heat exchange efficiency was lowered because heat exchange between the outside and the inside was performed only in a partial area of the total area of the heat transfer element due to concentrated flow. A wall is formed, but a blocking wall is formed at the upper edge of the heating element installed in a rhombus shape to form a section in which the flow passage cross-sectional area is rapidly reduced in the supply and exhaust passages. A change occurs in the flow direction of the outside air and the outside air flowing into the crossed flow path, so that the outside air and the outside air flow not only near the left and right corners and the center of the heating element, respectively, but also to the upper edge of the heating element, that is, the heat transfer element. It is possible to improve heat exchange efficiency by performing heat exchange while flowing through the entire area.

As described above, the detailed description of the present invention has been made by the embodiments with reference to the accompanying drawings, but since the above-described embodiments have only been described with preferred examples of the present invention, the present invention is limited only to the above embodiments It should not be understood as being, and the scope of the present invention should be understood as the following claims and their equivalent concepts.

100: total heat exchanger
110: electric heating element
111: cross flow path
111a: the first cross-type flow path
111b: 2nd crossed flow path
120: outside air intake
120a: filter
120b: backflow prevention wing
121: outdoor air outlet
130: bet inlet
131: bet outlet
140: air supply flow path
141: air supply fan
150: exhaust flow path
151: exhaust fan
160: barrier
161: bulkhead

Claims (3)

a heating element having first and second crossed flow passages formed thereon;
an air supply passage connected to the first crossed flow passage;
an exhaust passage connected to the second cross-type passage;
an air supply fan for discharging outdoor air to the indoor through the first crossed flow passage and the air supply passage;
an exhaust fan for discharging indoor air to the outdoors through the second crossed flow passage and the exhaust passage; and
The total heat exchanger having a flow path shape for improving heat exchange efficiency, comprising: a barrier wall formed at an upper edge of the heat transfer element in a shape protruding in both directions of the air supply flow path and the exhaust flow path.
According to claim 1,
The blocking wall forms a section in which the cross-sectional area of the flow passage is reduced in the air supply flow path and the exhaust flow path to generate a change in the flow direction of indoor and outdoor air, so that indoor and outdoor air flows through the entire area of the heating element and heat exchanges A total heat exchanger having a flow path shape for improving heat exchange efficiency, characterized in that to perform.
3. The method of claim 2,
At the outdoor air intake of the total heat exchanger,
a filter for filtering out foreign substances in the outdoor air introduced through the outdoor air intake; and
A total heat exchanger having a flow path shape for improving heat exchange efficiency, characterized in that a backflow prevention blade for preventing the air inside the total heat exchanger from flowing back to the outside through the outdoor air intake port is formed.

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