KR20210108248A - Ventilation System - Google Patents

Abstract

The present invention relates to a ventilator. More specifically, the ventilator includes: a casing including a front panel having an outside inlet, a rear panel having an inside air inlet, an upper panel and a connecting panel; a total heat exchanger placed in the casing; and an air blowing fan blowing air introduced into the casing. The air blowing fan includes: an upper plate placed to be opposed to the upper panel; and a lower plate opposed to the upper plate. Air is suctioned through an upper air inlet formed on the upper plate and a lower air inlet formed on the lower plate, a bypass flow path is formed between the total heat exchanger and the connecting panel, and a switching damper guiding the introduced inside air toward the air blowing fan is placed in the bypass flow path, and, thus, the placement of the air blowing fan is fused with the composition of an internal circulation flow path, and, as a result, there can be an advantage of increasing the heat exchange efficiency of the total heat exchanger as well as increasing the indoor air quality improvement efficiency of an independent inside air ventilation system at the same time.

Description

Ventilation System {Ventilation System}

The present invention relates to a ventilation device, and more particularly, to a blower fan and a switching damper disposed in the ventilation device.

A ventilation device is a device that exhausts indoor polluted air to the outside and supplies fresh outdoor air into the room, and maintains the freshness of the indoor air at a certain level.

In general households, heat recovery ventilation devices that reduce energy loss by recovering waste heat are mainly used. These heat recovery ventilation devices are equipped with a total heat exchanger that exchanges heat between polluted indoor air and fresh outdoor air for waste heat recovery. .

The total heat exchanger has an outdoor air inlet surface through which outside air is introduced and an indoor air inlet surface through which bet air is introduced, respectively, and the total heat exchanger has high heat exchange efficiency as the incoming air is uniformly distributed on the inlet surface and introduced.

However, the ventilation device using the conventional double suction blower fan has a problem of uneven flow between the blower fan suction surfaces due to the internal structural arrangement, so that the intake air flow is unevenly distributed on the inlet surface of the total heat exchanger.

In addition, as the ventilation device is continuously operated in the same mode, when the outdoor air quality is poor, the contaminated outdoor air is supplied to the room, and there is a problem in that the ventilation device is disposed for the purpose of the ventilation device.

In Korean Patent Laid-Open Patent No. 10-2019-0142661, in order to solve the problem of lowering the heat exchange efficiency of the total heat exchanger, by additionally arranging a sensible heat exchange element downstream of the total heat exchange element, the heat exchange efficiency was increased through heat exchange multiple times. There was a problem that the installation area was widened.

Korean Patent No. 10-1630580 discloses a method in which air is uniformly distributed on the inlet surface of the total heat exchanger by forming the flow path direction parallel to the inlet surface of the total heat exchanger. Since uniformity was achieved, it was difficult to obtain a high degree of flow uniformity, and there were problems in that the shape design of the air inlet and outlet paths was limited.

In addition, in the above two prior documents, there is a problem in that there is no disclosure of a supply method for improving indoor air quality when the outdoor air pollution degree is high, and the ventilation device cannot be driven when the outdoor air quality is poor.

Korean Publication No. 10-2019-0142661 Korean Patent Registration 10-1630580

The problem to be solved by the present invention is to allow air uniformly distributed on the inlet surface of the total heat exchanger to be introduced.

Another object of the present invention is to provide a structural alternative for improving indoor air quality when the pollution level of outdoor air is high.

Another object of the present invention is to maximize the efficiency of improving indoor air quality by linking with the ventilation fan arrangement structure in the above structural alternative.

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

In order to achieve the above object, a ventilation device according to an embodiment of the present invention includes: a front panel having an outdoor air inlet; a rear panel opposite to the front panel; a casing including an upper panel connecting the front panel and the rear panel; a total heat exchanger disposed in the casing and heat-exchanging the introduced air; and a blowing fan for blowing the introduced air out of the casing.

The blowing fan includes an upper plate facing the upper panel; and a lower plate opposed to the upper plate, and sucks air through an upper air inlet formed in the upper plate and a lower air inlet formed in the lower plate.

The blowing fan includes an exhaust blowing fan disposed between the front panel and the total heat exchanger; and a supply air blowing fan disposed between the rear panel and the total heat exchanger, and the exhaust blowing fan and the supply air blowing fan may be disposed at the same height.

The blowing fan may correspond to the central portion of the total heat exchanger, and may be disposed at a central height of the casing.

The blowing fan may be disposed horizontally with the casing.

The casing further includes a connecting panel connecting the front panel and the rear panel, a bypass flow path is formed between the total heat exchanger and the connecting panel, and the bet introduced into the bypass flow path is blown by the supply air blowing fan A switching damper guiding the direction is disposed.

The switching damper may selectively open and close the bypass passage.

An internal circulation passage sharing a predetermined area with the bypass passage may be formed in the casing, and a filter for filtering out foreign substances contained in the introduced bet may be disposed in the inner circulation passage.

The total heat exchanger includes a heat exchange body in which air is exchanged; and a plate disposed at an end of the heat exchange body, and the switching damper may be disposed between the plate and the connecting panel.

The filter may be disposed between the plate and the connecting panel, and may be located downstream of the switching damper on the internal circulation passage.

The internal circulation flow path may be divided into a shared area shared with the bypass flow path and a switching area independent of the bypass flow path, and the switching damper and the filter may be disposed in the switching area.

The blowing fan may be formed with an air intake opening toward the upper side, the bet flowing through the switching area may be sucked through the air intake.

The switching damper includes a rotary shaft; and a damper body extending downward from the rotation shaft, and the damper body may rotate about the rotation shaft to adjust the degree of opening and closing of the bypass passage.

A slope inclined upward from the low panel of the casing may be formed, the slope may be located in the shared area, and an end of the damper body may be rotated to contact an edge of the slope.

The switching damper may further include a damper controller for controlling a rotation angle of the damper body.

A valve for selectively opening and closing the outdoor air inlet may be disposed at the outdoor air inlet, and the valve may be controlled by the damper controller.

The details of other embodiments are included in the detailed description and drawings.

According to the ventilation device of the present invention, there are one or more of the following effects.

First, since the flow is evenly distributed and sucked to both suction surfaces of the blower fan symmetrical with respect to the total heat exchanger, there is an advantage in that the heat exchange efficiency of the total heat exchanger can be increased through uniform flow to the inlet surface of the total heat exchanger.

Second, by configuring the internal circulation flow path by adjusting the rotation angle of the switching damper disposed in the bypass flow path, even when the outdoor air quality is highly polluted, the indoor air quality can be improved through an independent ventilation system.

Third, there is an advantage that, by harmonizing the arrangement of the blowing fan and the internal circulation flow path configuration described above, the heat exchange efficiency of the total heat exchanger and the indoor air quality improvement efficiency of the independent internal ventilation system can be increased at the same time.

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 perspective view of a ventilation device according to an embodiment of the present invention.
2 is an internal configuration diagram of a ventilation device according to an embodiment of the present invention.
3 is a diagram schematically showing an air flow diagram according to an embodiment of the present invention.
4 is a view for explaining the air flow in the total heat exchanger according to the embodiment of the present invention.
5 is a top perspective view of a ventilation device according to an embodiment of the present invention.
6 is a perspective view of a blower fan fan housing according to an embodiment of the present invention.
7 (a) is a part of an upper perspective view of a ventilation device according to an embodiment of the present invention.
Figure 7 (b) is a side perspective view of the state in which the front panel is removed in Figure 7 (a).
Fig. 8 (a) is a part of an upper perspective view of the ventilation device in which the blowing fan of Fig. 7 is moved in the X direction.
(b) of FIG. 8 is a side perspective view of a state in which the front panel is removed in (a) of FIG. 8 .
9 is a contour comparing the flow uniformity in the prior art, the embodiment of FIG. 7, and the total heat exchanger according to the embodiment of FIG.
10 is a view for explaining a bypass flow path of the ventilation device according to the embodiment of the present invention.
11 is a front perspective view of FIG. 10 .
12 is a view for explaining an internal circulation flow path of the ventilation device according to the embodiment of the present invention.
13 is a front perspective view of FIG. 12 .

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the art to which the present invention pertains It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, the present invention will be described with reference to the drawings for explaining a ventilation device according to embodiments of the present invention.

1 to 3 , it is possible to schematically confirm the external appearance of the ventilation device V and the internal configuration of the casing 100 according to the embodiment of the present invention.

The casing 100 constituting the outer shape of the ventilation device V may have a rectangular parallelepiped shape, and the horizontal and vertical lengths of the upper and lower panels 150 and 160 may be longer than the height.

The front panel 110 of the casing 100 may include an outdoor air inlet 111 through which outdoor air flows into the casing 100 and an internal exhaust port 112 through which indoor air is exhausted to the outside, and the front panel 110 may be arranged to be exposed to the outdoors.

On the front panel 110, an outdoor air inlet flange 113 having the same opening area as the outdoor air inlet 111 may be formed to protrude toward the outdoors, and an inner exhaust flange 114 having the same opening area as the inner exhaust port 112. ) may be formed to protrude toward the outdoors. The shape of the internal exhaust flange 114 and the outside air inlet flange 113 may be a rib shape having a circular cross-section protruding from the front panel 110 to the outside.

A valve 113b for controlling the degree of opening of the outdoor air inlet 111 may be disposed on the outdoor air inlet flange 113 , and the valve 113b is coupled to the outdoor air inlet flange 113 by a hinge 113a and a hinge 113a ) can be rotated around

The rear panel 120 may be formed at a position opposite to the front panel 110 , and the front panel 110 and the rear panel 120 may be disposed parallel to each other. The front panel 110 and the rear panel 120 may be connected to each other by a first connecting panel 130 and a second connecting panel 140 , and the first connecting panel 130 and the second connecting panel 140 are Each of the front panel 110 and the rear panel 120 may be disposed to extend from the end. Accordingly, the cross section formed by the front panel 110 , the rear panel 120 , the first connecting panel 130 , and the second connecting panel 140 may have a rectangular closed loop shape.

The rear panel 120 may be provided with an indoor air inlet 121 through which indoor air flows into the casing 100 and an outdoor air supply port 122 through which outdoor air is supplied into the room, and the rear panel 120 is exposed to the interior. can be arranged as much as possible.

On the rear panel 120, an inside air inlet flange 123 having the same opening area as the inside air inlet 121 may be formed to protrude toward the room, and an outside air supply flange having the same opening area as the outside air supply mechanism 122 ( 124) may be formed to protrude toward the room. The internal air intake flange 123 and the external air supply flange 124 may have a rib shape having a circular cross-section protruding from the rear panel 120 toward the room.

A space in which the parts for driving the ventilation device V can be accommodated may be formed in the casing 100 .

A space may be formed between the first connecting panel 130 and the total heat exchanger 20 , and a chamber 171 and a slope 172 having an inclination angle in the front panel 110 direction may be disposed in the space. . In this case, the relative positional relationship between the chamber 171 and the slope 172 is that the chamber 171 may be disposed relatively close to the rear panel 120 and the slope 172 may be disposed close to the front panel 110 . have.

A total heat exchanger 20 is disposed between the front panel 110 and the rear panel 120 to exchange heat with the introduced outside air and the inside air, and the overall shape of the total heat exchanger 20 may be an inclined rectangular parallelepiped shape, and the ventilation device (V) The shape on the longitudinal section may be a rhombus.

The inflow surface length of the total heat exchanger 20 may be formed in a direction parallel to the front panel 110 and the rear panel 120 , and the inflow surface length may be longer than the horizontal and vertical length of the plate 29 .

The total heat exchanger 20 may have four permeation surfaces 21, 22, 23, 24, and the four permeation surfaces 21, 22, 23, 24 each have an outdoor air inlet surface 21 through which outside air flows, It may be a bet inlet surface 22 through which the bet is introduced, an outdoor air discharge surface 23 through which the outside air is discharged, and a bet discharge surface 24 through which the bet is discharged.

The outside air inlet surface 21 and the outside air discharge surface 24 may face the front panel 110 while forming a predetermined angle with each other, and the inside air intake surface 22 and the outside air discharge surface 23 form a predetermined angle with each other while forming the rear It may face the panel 120 . At this time, the angle between the outside air inlet surface 21 and the inside discharge surface 24 and the angle between the inside air inflow surface 22 and the outside air discharge surface 23 may be vertical, and the four transmission surfaces 21 and 22 , 23 and 24 may form an angle of 45 degrees with the front panel 110 and the rear panel 120 .

Hereinafter, with reference to FIGS. 2 to 4 , the flow path of the outside air and the inside air within the casing 100 will be described according to the embodiment of the present invention based on the detailed configuration of the total heat exchanger 20 .

The outdoor air introduced into the casing 100 through the outdoor air inlet 111 flows into the outdoor air inlet surface 21 of the total heat exchanger 20, and then is discharged from the total heat exchanger 20 through the outdoor air discharge surface 23, Air is supplied into the room through the outdoor air supply mechanism (122).

The bet introduced into the casing 100 through the bet inlet 123 is introduced into the bet inlet surface 22 of the total heat exchanger 20, and then discharged from the total heat exchanger 20 through the inner discharge surface 24, and bet It is exhausted to the outside through the exhaust port 114 .

At this time, in order to guide the introduced outside air and bet to flow along the above-described path, a sealed housing structure forming a fixed flow path may be formed in the casing 100 , and details thereof will be described later.

A plate 29 may be disposed at both ends of the total heat exchanger 20 , and the four sides 21 , 22 , 23 , 24 through which the outside air and bet air flow may be formed extending from both plates 29 .

The plate 29 may be disposed perpendicularly to the front panel 110 and the rear panel 120 , and the outdoor wall 2 may penetrate the center of the plate 29 , and may be based on the outdoor wall 2 . The outside air inlet surface 21 and the outside air discharge surface 24 are disposed on the outside, and the outside air inlet surface 22 and the outside air discharge surface 23 may be disposed on the inside based on the outdoor wall 2 . Accordingly, the inside of the casing 100 may be divided into a portion disposed on the outdoor side and a portion disposed on the indoor side based on the outdoor wall 2 .

On the outdoor air inlet surface 21, the outdoor air permeable layer having a plurality of through-holes 21a formed thereon and the outdoor air shielding surface 21b for blocking the flowing air may be alternately stacked and disposed, and on the inner air inlet surface 22 A plurality of through-holes (22a) are formed and the inner shielding surface (22b) for blocking the flow air and the inner permeation layer may be alternately stacked and arranged.

At this time, the outdoor air permeable layer and the outdoor air shielding surface 21b are arranged on the same plane, and the internal air permeable layer and the internal shielding surface 22b are arranged on the same plane, thereby flowing into the outdoor air inlet surface 21 and exhausting the outdoor air The outside air discharged to the side 23 and the outside air discharged to the outside air inflow side 22 and discharged to the inside discharge side 24 flow in different layers, so that they do not mix with each other and can exchange heat.

The total heat exchanger 20 may be composed of a heat exchange body 28, which is a region where the introduced outside air and bet air are exchanged with each other, and plates 29 disposed at both ends of the heat exchange body 28, and the outside air inlet surface ( 21), the inner air inlet surface 22, the outdoor air discharge surface 23 and the inner air discharge surface 24 may all refer to each circumferential surface of the heat exchange body 28.

Hereinafter, the arrangement structure of the ventilation fan of the ventilation device according to an embodiment of the present invention will be described with reference to FIGS. 2, 5 and 6 .

Between the total heat exchanger 20 and the front panel 110 in the casing 100, an exhaust blower fan 50 that heats up through the inside discharge surface 24 and blows the discharged bet to the outside may be disposed. At this time, a double suction sirocco fan may be used as the exhaust blowing fan 50 .

Between the total heat exchanger 20 and the rear panel 120 in the casing 100 , a supply air blowing fan 50 that heats up the outside air through the outside air discharge surface 23 and blows the discharged outside air into the room may be disposed. At this time, a double suction sirocco fan may be used as the supply air blowing fan 50 .

Both the exhaust blowing fan 50 and the supply air blowing fan 50 are a kind of the blowing fan 50 , and both have the same configuration and function, and can be classified as a concept in which only the arrangement position is different.

The blower fan 50 may be disposed side by side with the upper panel 150 and the low panel 160. In this case, the side-by-side arrangement means not only that the surfaces facing each other are parallel, but also twist at a predetermined angle. It can also mean that they are arranged so that regions corresponding to each other are created.

The blower fan 50 rotates with power applied from an external power source (not shown) to generate a suction force, and receives the impeller 30 and air intakes 44 and 45 through which air is sucked and suction. It may include a fan housing 40 having an air outlet 46 through which the exhausted air is discharged.

Referring to FIG. 6 , looking at the specific shape of the fan housing 40 , the external appearance of the fan housing 40 includes an upper plate 41 disposed on the upper side, a lower plate 42 opposite to the upper plate 41 , and , it may be composed of a scroll plate 43 connecting the upper plate 41 and the lower plate 42 to each other.

The upper plate 41 and the lower plate 42 may be disposed parallel to each other and may have a flat plate shape. In addition, the shape of the scroll plate 43 is not limited to the rounded surface, and may be a curved shape having a plurality of bending points.

The air outlet 46 may be formed to be opened at the end of the fan housing 40 , and a plurality of air inlets 44 and 45 may be formed.

The air outlet 46 may be an open space in which ends of the upper plate 41 , the lower plate 42 , and the scroll plate 43 form a boundary, and is perpendicular to the upper plate 41 and the lower plate 42 . can be formed.

The air intakes 44 and 45 may be classified into an upper air intake 44 formed in the upper plate 41 and a lower air intake 45 formed in the lower plate. At this time, the air intakes (44, 45) may be formed at positions opposite to each other, and may be concentric circles having the same diameter.

The impeller 30 may be disposed between the upper plate 41 and the lower plate 42 , the rotation shaft is perpendicular to the upper plate 41 and the lower plate 42 , and the suction surface formed by the rotation is the air intake port (44, 45) may be arranged side by side.

The rotation shaft of the impeller 30 may pass through the center of the air intakes 44 and 45 , and the diameters of the air intakes 44 and 45 may be greater than or equal to the diameter of the impeller 30 . Air sucked into the fan housing 40 through the air inlets 44 and 45 by the rotation of the impeller 30 may flow in the direction of the air outlet 46 .

The inlet length of the total heat exchanger 20 may be formed in a direction perpendicular to the first connecting panel 130 and the second connecting panel 140 , and the rotation axis of the impeller 30 is the inlet length direction, the first It may be perpendicular to both the connecting panel 130 and the second connecting panel 140 .

At this time, the distance between the plates 29 located at both ends of the total heat exchanger 20 may be defined as the inlet length of the total heat exchanger 20 , and the blower fan 50 is a total heat exchanger from the rotation shaft of the impeller 30 . (20) The distance between the plates 29 located at both ends may be disposed at the same position. In this case, it can be expressed that the blowing fan 50 corresponds to the central portion of the total heat exchanger 20 .

The blower fan 50 may be disposed such that the distance between the upper plate 41 and the upper panel 150 and the distance between the lower plate 42 and the lower panel 160 are the same. In this case, it can be expressed that the blowing fan 50 is disposed at the central height of the casing 100 .

The exhaust blowing fan 50 and the air supply blowing fan 50 may be disposed at the same height of the casing 100 , and both may be disposed at a central height of the casing 100 .

In addition, in the blower fan 50 , the distance between both plates 29 from the rotation axis of the impeller 30 is the same, and the distance between the upper plate 41 and the upper panel 150 and the lower plate 42 and the lower panel It may be disposed at a position where the distance between 160 is the same.

Each end of the upper plate 41 , the lower plate 42 , and the scroll plate 43 of the fan housing 40 is, in the case of the exhaust blowing fan 50 , the front panel 110 and the supply air blowing fan 50 . In this case, it may be in close contact with the rear panel 120 or may be integrally combined. At this time, the air outlet 46 may be formed in the same position as the internal exhaust port 112 or the outside air supply port 122 in each case.

The front panel 110 has an inside exhaust flange 114 that protrudes toward the outdoors, and an outside air inlet flange 113 may be formed, and the inside exhaust flange 114 is a front panel adjacent to the first connecting panel 130 ( 110 , and the outside air inlet flange 113 may be formed at an end of the front panel 110 adjacent to the second connecting panel 140 .

The internal exhaust flange 114 and the outside air inlet flange 113 may have a cylindrical shape in which an air flow passage is formed therein, and the cross-sectional area of the internal exhaust flange 114 is the same as or similar to the cross-sectional area of the internal exhaust port 112. and the cross-sectional area of the outdoor air inlet flange 113 may have the same or similar value as the cross-sectional area of the outdoor air inlet 111 .

The inside exhaust flange 114 and the outside air inlet flange 113 may be connected to an outdoor duct (not shown) to form an air inflow and outflow path of the ventilation device (V).

The rear panel 120 may include an outside air supply flange 124 protruding toward the room and an inside air inlet flange 123, and the outside air supply flange 124 is a rear panel adjacent to the second connecting panel 140 (140). It may be formed at the end of the 120, the bet inlet flange 123 may be formed at the end of the rear panel 120 adjacent to the first connecting panel (130).

The outside air supply flange 124 and the inside air inlet flange 123 may have a cylindrical shape in which an air flow passage is formed, and the cross-sectional area of the outdoor air supply flange 124 is the same as or similar to the cross-sectional area of the outdoor air supply mechanism 122. may have, and the cross-sectional area of the bet inlet flange 123 may have the same or similar value to the cross-sectional area of the bet inlet 121.

The outdoor air supply flange 124 and the indoor air inlet flange 123 may be connected to an indoor duct (not shown) to form an air inlet flow path of the ventilation device (V).

Hereinafter, an arrangement position of the blowing fan 50 according to an embodiment of the present invention will be described with reference to FIGS. 7 and 8 .

(a) in each of Figures 7 and 8 shows the interior of the ventilation device (V) according to the embodiment of the present invention looking down from above, (b) is the front panel 110 in Figure (a) ) is shown with the side view removed.

7 and 8, only the case of the exhaust blowing fan 50 is excerpted and described for convenience of explanation, but the description regarding the arrangement of the exhaust blowing fan 50 to be described below is for the supply air blowing disposed at opposite positions. Since the same or similar application may be applied to the case of the fan 50, a detailed description of the supply air blowing fan 50 will be omitted.

The blowing fan 50 shown in FIG. 8 is arranged by moving the blowing fan 50 shown in FIG. 7 by a predetermined distance in the central direction (X), and before and after the movement, the upper plate 41, the lower plate 42, The upper panel 150 and the lower panel 160 may be parallel to each other.

After moving, the blowing fan 50 may be closer to the outdoor air inlet 111 , the outdoor air inlet housing 115 and the outdoor air flow housing 116 than before moving, and may be closer to the central portion of the total heat exchanger 20 . At this time, since the position of the air outlet 46 also changes according to the movement of the blowing fan 50, the position of the internal exhaust flange 114 may also be arranged at the position where the air outlet 46 is moved.

Compared to before moving, the distance between the upper plate 41 and the upper panel 150 may become closer after moving, and the distance between the lower plate 42 and the lower panel 160 may become farther after moving.

In this case, the center line of the scroll plate 43 may be parallel to the upper panel 150 and the lower panel 160 , and the distance between the center line and both may be the same.

Referring to FIG. 9, when the blowing fan is vertically disposed according to the prior art (FIG. 9 (a)), when the blowing fan is horizontally disposed according to FIG. 7 (FIG. 9 (b)), and FIG. 8 Accordingly, the flow uniformity on the heat exchange body 28 according to the horizontal arrangement of the blower fan (FIG. 9 (c)) can be confirmed.

For convenience of explanation, as shown in FIG. 9( a ), the location of the blowing fan corresponding to the central part of the heat exchanger 20 is defined as a center area C, and air is blown from the center area C. The distance from the end of the fan is defined as the offset distance (D).

Referring to FIG. 9 , the offset distance D decreases in the order of (a), (b), and (c), and the blower fan is disposed at a higher position in (c) as compared to (b).

When the flow uniformity is compared through the contours shown in (a), (b), and (c), it can be confirmed that the flow is concentrated in the first region (P) corresponding to the inlet through which air is introduced in (a). In the case of (b), it can be seen that the second region (Q), which is a region in which the flow is dense compared to (a), is dispersed in the left and right directions, and in the case of (c), the third region (R), which is a region in which the flow is dense, compared to (a). ), it can be seen that the area of the first area (P) and the second area (Q) are remarkably reduced.

Accordingly, it can be said that the flow is uniformly distributed and introduced into the total heat exchanger 20 due to the horizontal arrangement of the center region (C) of the double suction blower fan.

Hereinafter, the bypass flow path 170 according to the embodiment of the present invention will be described with reference to FIGS. 5, 10 and 11 .

The bet introduced into the inside of the casing 100 through the bet inlet 121 may flow to the bet flow housing 126 through the bet inflow housing 125, and some of the bets that have reached the bet flow housing 126 are It is introduced into the total heat exchanger 20 through the internal inlet surface 22 of the total heat exchanger 20, and the remainder can flow toward the chamber 171 formed between the plate 29 and the first connecting panel 130. .

The inner flow housing 126 may be formed from the low panel 160 to the bet inlet surface 22 height, and accordingly, the bet flowing inside the inner flow housing 126 may be restricted from flowing in the upward direction.

The chamber 171 may be formed to extend from the inner flow housing 126 , and may be in contact with the upper panel 150 and the first connecting panel 130 .

The overall shape of the chamber 171 may be a 'L' shape, and may extend upward from the inner flow housing 126 to come into contact with the upper panel 150 and then be bent to extend to the first connecting panel. Accordingly, a passage through which the bet can flow may be formed between the plate 29 and the first connecting panel 130 by the chamber 171 .

A slope 172 inclined toward the front panel 110 from the entrance of the chamber 171 may be formed inside the chamber 171 , and the slope angle of the slope 172 may be constant.

The slope 172 may perform a function of guiding the bet in the upward direction, which is bound to flow in the lower region of the casing 100 due to the limited height of the bet flow housing 126 .

At the end of the slope 172 , an edge surface 172a supporting the slope 172 may extend from the end of the slope 172 to the low panel 160 , and the edge surface 172a is the low panel 160 . ) and disposed perpendicular to the slope 172 may form an abrupt inclination angle in the boundary region between the slope 172 and the edge surface 172a.

The bet introduced into the chamber 171 may be guided by the slope 172 to flow toward the upper portion of the casing 100, and after passing through the chamber 171 by the upward airflow formed by the slope 172, the upper It may flow along the inner surface of the panel 150 and may be exhausted to the outside through the upper air inlet 44 of the blower fan 50 formed to face the upper panel 150 .

At this time, the blower fan 50 is disposed so that the upward airflow formed by the slope 172 can flow into the upper air intake 44 while maintaining the laminar flow, so that the upper panel 150 and the upper air intake 44 are In the case of vertical arrangement, it is possible to prevent an increase in the intensity of turbulence due to changes in airflow.

The bypass flow path 170 passes through the bet inlet 121, the bet inlet housing 125, the bet flow housing 126, the inlet of the chamber 171, the slope 172, and the exhaust blower fan 50 in order to the bet exhaust port. It may be a concept that collectively refers to a flow path area in which bets discharged to the outside through 112 flow.

The bypass flow path 170 may be divided into a shared area S1, which is a flow area common to the internal circulation flow path 180, which will be described later, and a bypass area S2, which is distinct from the internal circulation flow path 180, and is shared. Region (S1) may be formed in the lower portion of the casing 100 by the limited height of the inner flow housing 126, the bypass region (S2) is the casing 100 by the upward airflow formed by the slope (172) ) may be formed on the top.

The concept of the shared area S1 and the bypass area S2 may be a fluid concept that can be changed according to flow flow and analysis, and the boundary between the shared area S1 and the bypass area S2 is a computer program It can be calculated based on the distribution value of the average flow direction change rate calculated by flow analysis through

Hereinafter, an internal circulation flow path 180 according to an embodiment of the present invention will be described with reference to FIGS. 5, 12 and 13 .

The bet introduced into the inside of the casing 100 through the bet inlet 121 may flow to the bet flow housing 126 through the bet inflow housing 125, and some of the bets that have reached the bet flow housing 126 are It is introduced into the total heat exchanger 20 through the internal inlet surface 22 of the total heat exchanger 20, and the remainder can flow toward the chamber 171 formed between the plate 29 and the first connecting panel 130. .

The bet introduced into the chamber 171 can be guided by the slope 172 to flow toward the upper portion of the casing 100 , and the flow in the front panel 110 direction by the damper 60 located in the flow direction is suppressed. may be limited.

A bet that had flown in the direction of the front panel 110 on the slope 172 may collide with the damper 60 to change the flow direction to the rear panel 120 , and the bet that collided with the damper 60 is the upper portion of the casing 100 . It can flow through the space formed between the upper panel 150 and the inner flow housing 126 while passing through the filter 70 disposed in the upper panel 150, exiting from the chamber 171, riding the inner surface of the upper panel 150 Air may be supplied into the room through the upper air inlet 44 of the blowing fan 50 formed to face the upper panel 150 .

At this time, the blower fan 50 is disposed so that the upward airflow formed by the slope 172 can flow into the upper air intake 44 while maintaining the laminar flow, so that the upper panel 150 and the upper air intake 44 are In the case of vertical arrangement, it is possible to prevent an increase in the intensity of turbulence due to changes in airflow.

The internal circulation flow path 180 has an internal circulation inlet 121, an internal inlet housing 125, an internal flow housing 126, an inlet of the chamber 171, a slope 172, a damper 60, a filter 70, and supply air. It may be a concept that collectively refers to a flow path area in which the bet air discharged into the room through the outdoor air supply mechanism 122 through the blowing fan 50 in turn flows.

The internal circulation flow path 180 may be divided into a shared area S1 that is a flow area common to the bypass flow path 170 and a switching area S3 that is distinct from the bypass flow path 170 , and the shared area S1 . ) may be formed in the lower part of the casing 100 by the limited height of the inner flow housing 126, and the switching area S3 is on the upper part of the casing 100 by the upward airflow formed by the slope 172. can be formed.

The concept of the shared area (S1) and the switching area (S3) may be a flexible concept that can be changed according to the flow and interpretation, and the boundary between the shared area (S1) and the switching area (S3) is determined through a computer program. It can be calculated based on the distribution value of the average flow direction change rate calculated by flow analysis.

Hereinafter, the principle of flow path switching by the damper 60 will be described with reference to FIGS. 10 to 13 .

10 and 11 show a state in which the bypass flow path 170 is opened by the rotation of the damper 60 , and FIGS. 12 and 13 show that the bypass flow path 170 is closed by the rotation of the damper 60 . and shows a state in which switching to the internal circulation passage 180 is made.

The damper 60 may be disposed to extend downward from the control substrate 171a located on the upper side of the chamber 171 , and both ends of the control substrate 171a have the plate 29 and the first connecting panel 130 . may be in contact with each.

One surface of the control substrate 171a may be in contact with the upper panel 150 and accommodate the damper 60 and the damper controller 63 for controlling the rotation angle of the valve 113b therein.

The pivot 61 of the damper 60 may be attached to the lower surface of the control substrate 171a, and may be accommodated and fixed inside the control substrate 171a.

The pivot 61 is connected to a motor (not shown) and can rotate by obtaining rotational power from the motor (not shown).

The pivot 61 extends from the first connecting panel 130 in the direction of the plate 29 to function as a rotation axis for rotating the damper body 62, and is electrically connected to the damper controller 63, and the damper controller ( 63) based on the value received from the damper body 62 can be rotated. At this time, the damper controller 63 may command rotation of the motor (not shown) by sending an electrical signal to the motor (not shown) coupled to the pivot 61 .

The damper body 62 may be a flat plate extending downward from the pivot 61 , and may have a transverse length equal to or smaller than the distance between the first connecting panel 130 and the plate 29 .

The end of the damper body 62 may be in contact with the upper surface of the inner flow housing 126 by rotation, and may be in contact with the boundary formed by the slope 172 and the edge surface 172a. At this time, the damper body 62 may rotate within the range between the two contact points.

When the outdoor air pollution level is low and internal circulation through the internal circulation flow path 180 is not required, the damper 60 may rotate so that the end of the damper body 62 is in contact with the upper surface of the internal flow housing 126. In addition, the bet introduced into the chamber 171 may flow in the direction of the front panel 110 through the bypass flow path 170 and be discharged to the outside through the exhaust blower fan 50 .

At this time, the damper controller 63 may send an electrical signal to the hinge 113a disposed at the outdoor air inlet 113, and the hinge 113a based on the received signal, the outdoor air through the outdoor air inlet 111. The valve 113b may be rotated to be introduced into the casing 100 . The rotation of the valve 113b may be performed by a motor (not shown), and the motor (not shown) may rotate the valve 113b based on a signal received from the damper controller 63 .

When the outdoor air pollution degree is high, and internal circulation through the internal circulation flow path 180 is required, the damper 60 has a boundary formed by the slope 172 and the edge surface 172a at the end of the damper body 62 and It can be rotated to be in contact, and the flow in the chamber 171 is restricted by the damper body 62 in the direction of the front panel 110 and passes through the filter 70 through the internal circulation passage 180 . , may be discharged into the room through the supply air blowing fan 50 .

At this time, the damper controller 63 may send an electrical signal to the hinge 113a disposed on the outdoor air inlet flange 113, and the hinge 113a is based on the received signal through the outdoor air inlet 111. By rotating the valve 113b so that outside air cannot be introduced into the casing 100, the outside air inlet 111 can be shielded.

According to the above principle, the bet flowing through the bypass flow path 170 may undergo a flow path switching process to the internal circulation flow path 180 by rotational driving of the damper 60 , and ride the internal circulation flow path 180 . The bet flowing to the supply air blowing fan 50 can be supplied into the room as it is in a clean state after the foreign substances contained while passing through the filter 70 are removed.

The shape specification of the damper 60 may be a value capable of completely blocking the air flow passage through the chamber 171 by rotation, in this case the bypass passage 170 is closed by the rotation of the damper 60 . All of the introduced bets may be supplied into the room through the internal circulation passage 180 .

The shape specification of the damper 60 may be a number capable of partially shielding the air flow passage through the chamber 171 by rotation, and in this case, the bypass passage 170 is partially closed by the rotation of the damper 60 . Some of the introduced bets may be supplied into the room through the internal circulation flow path 180 and the rest may be discharged to the outside through the bypass flow path 170 .

In the above, preferred embodiments of the present invention have been shown and described, but the present invention is not limited to the specific embodiments described above, and in the technical field to which the present invention pertains without departing from the gist of the present invention as claimed in the claims. Various modifications may be made by those of ordinary skill in the art, and these modifications should not be individually understood from the technical spirit or perspective of the present invention.

20: total heat exchanger 30: impeller
40: fan housing 50: blower fan
60: damper 70: filter
100: casing 110: front panel
120: rear panel 130: first connecting panel
140: second connecting panel 170: bypass flow path
171: chamber 172: slope
180: internal circulation flow path

Claims (17)

a casing comprising a front panel having an outdoor air inlet formed thereon, a rear panel having an indoor air inlet formed and facing the front panel, an upper panel connecting the front panel and the rear panel, and a low panel facing the upper panel;
a total heat exchanger disposed between the front panel and the rear panel, surrounded by a permeable surface through which the introduced outdoor air and bet air are transmitted, to exchange heat with the introduced outdoor air and bet air; and
and a supply air blowing fan disposed between the rear panel and the total heat exchanger,
The air supply fan
an upper plate disposed to face the upper panel and formed with an upper air intake;
and a lower plate disposed to face the low panel and formed with a lower air intake,
The air passing through the total heat exchanger is both sucked through the space between the upper panel and the upper plate and the space between the lower panel and the lower plate.
The method of claim 1,
Further comprising an exhaust blowing fan disposed between the front panel and the total heat exchanger,
The exhaust ventilation fan and the supply air blowing fan are symmetrically disposed at the same height.
The method of claim 1,
The air supply fan
A ventilation device disposed to correspond to the central portion of the total heat exchanger.
The method of claim 1,
The air supply fan
A ventilation device disposed at a central height of the casing.
The method of claim 1,
The air supply fan
A ventilation device corresponding to the central portion of the total heat exchanger and disposed at a central height of the casing.
The method of claim 1,
The upper plate is parallel to the upper panel, and the lower plate is parallel to the lower panel.
a casing including a front panel having an outdoor air inlet formed thereon, a rear panel having an indoor air inlet formed and facing the front panel, and a connecting panel connecting the front panel and the rear panel;
a total heat exchanger disposed between the front panel and the rear panel to exchange heat with the introduced outside air and bet air;
a supply air blowing fan disposed between the total heat exchanger and the rear panel to suck in air in the casing and discharge it to a room; and
and an exhaust blowing fan disposed between the total heat exchanger and the front panel and discharging the introduced bet to the outside;
A bypass flow path is formed between the total heat exchanger and the connecting panel through which the introduced bet flows toward the exhaust blowing fan,
In the bypass passage,
A ventilation device in which a switching damper for guiding the introduced bet in the direction of the supply air blowing fan is disposed.
8. The method of claim 7,
The switching damper is
A ventilation device for selectively opening and closing the bypass passage.
8. The method of claim 7,
Inside the casing
An internal circulation passage through which the introduced bet flows toward the supply air blowing fan is formed,
In the internal circulation path,
A ventilation device in which a filter through which the bet is transmitted is disposed.
8. The method of claim 7,
The total heat exchanger
a heat exchange body in which the outside air and the bet are heat exchanged;
It is disposed at the end of the heat exchange body, comprising a plate parallel to the connecting panel,
The switching damper is
A ventilation device disposed between the plate and the connecting panel.
11. The method of claim 10,
Inside the casing
An internal circulation passage through which the introduced bet flows toward the supply air blowing fan is formed,
In the internal circulation path,
A filter through which the bet is transmitted is disposed,
the filter is
A ventilation device disposed between the plate and the connecting panel and positioned downstream of the switching damper on the internal circulation passage.
12. The method of claim 11,
The internal circulation flow path
a common area common to the bypass flow path and formed under the casing;
The bypass flow path and the flow direction are different, and it is divided into a switching area formed on the upper side of the casing,
The switching damper and the filter are ventilation devices disposed in the switching area.
13. The method of claim 12,
The air supply fan has
An air intake through which the bet flowing through the switching area is sucked is formed,
The air intake is
A ventilation device opened toward the upper side of the casing.
13. The method of claim 12,
The switching damper is
a rotating shaft extending from the connecting panel toward the plate;
and a damper body extending downward from the rotation shaft;
The damper body is
A ventilation device that rotates about the rotation shaft and adjusts the degree of opening and closing of the bypass flow path.
15. The method of claim 14,
In the casing
A slope protruding obliquely upward from the bottom surface of the casing is formed,
The slope is located in the shared area,
The end of the damper body is
A ventilation device that rotates and comes into contact with the edge of the slope.
15. The method of claim 14,
The switching damper is
Ventilation device further comprising a damper controller for controlling the rotation angle of the damper body.
17. The method of claim 16,
At the outdoor air inlet
A valve for selectively opening and closing the outdoor air inlet is disposed,
The valve is
A ventilation device for adjusting the degree of opening and closing of the outdoor air inlet based on the signal received from the damper controller.

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