KR100556312B1 - A ventilation system - Google Patents

Abstract

The present invention relates to a ventilator provided with a total heat exchange element made of a plastic material.

In the ventilator according to the present invention, the total heat exchange element 61 of the total heat exchanger 60 for exchanging the external air and the indoor air with each other is made of a conductive plastic material having a high heat transfer rate. The heat exchange element 61 is provided with a partition plate 61 'that divides the flow path of the indoor air and the flow path of the outdoor air and a partition plate 61' protruding from one surface of the partition plate 61 '. And a gap forming portion 61 "to be stacked at predetermined intervals, and the partition plate 61 'and the gap forming portion 61" are integrally injection molded. On the other hand, the total heat exchange element 61 is made of a porous plastic material formed with a plurality of fine bubbles, these fine bubbles are formed by mixing a supercritical fluid during injection molding. In addition, carbon dioxide (CO₂) or nitrogen (N₂) is used as the supercritical fluid. According to the heat exchange element of the present invention as described above, there is an advantage that the heat transfer performance of the ventilator is improved and the noise is reduced.

Ventilation device, total heat exchanger, total heat exchange element, porosity

Description

A ventilation system {

1 is a perspective view of a ventilation apparatus according to the prior art.

Figure 2 is an exploded perspective view of the ventilation device according to the prior art.

3 is a block diagram of a total heat exchange element according to the prior art.

Figure 4 is an exploded perspective view showing the configuration of a preferred embodiment of the ventilation apparatus according to the present invention.

Figure 5 is a cutaway perspective view showing the internal configuration of the ventilation apparatus according to the present invention.

Figure 6a is a perspective view showing a first embodiment of the total heat exchange element of the main configuration of the ventilation apparatus according to the present invention.

Figure 6b is a perspective view showing a second embodiment of the total heat exchange element of the main configuration of the ventilation apparatus according to the present invention.

Figure 6c is a perspective view showing a third embodiment of the total heat exchange element of the main configuration of the ventilation apparatus according to the present invention.

Figure 6d is a perspective view showing a fourth embodiment of the total heat exchange element of the main configuration of the ventilation apparatus according to the present invention.

Figure 7 is a cross-sectional view showing a schematic configuration of an injection molding machine for injection molding the total heat exchange element that is a main part of the ventilation apparatus according to the present invention.

8 is a state diagram showing a state in which air flows inside the ventilation apparatus according to the present invention during the full-heat ventilation mode operation.

Figure 9 is a state diagram showing a state in which air flows inside the ventilation apparatus according to the present invention during the normal ventilation mode operation.

Explanation of symbols on the main parts of the drawings

50. Main body case 52. External air intake

54. Left suction duct 56. Indoor air outlet

58. Left exhaust duct 60. Heat exchanger

61. Heat exchange element 61 '. Partition plate

61 ". Spacing 62. Support Frame

64. Left guide protrusion 64 '. Right guide protrusion

66. Exchange guide 70. Injection molding machine

72. Cylinder 74. Plastic supply pipe

76. Supercritical fluid supply pipe 82. External air outlet

84. Outlet mounting hole 86. Right exhaust duct

88. Indoor air intake port 90. Indoor air intake hole

92. Right suction duct 94. Damper

100. Exhaust fan 150. Supply fan

200. Control Box 210. Fan Housing

The present invention relates to a ventilator, and more particularly, to a ventilator formed of a porous plastic resin of the total heat exchange element that exchanges heat and water in the supply and exhaust periods.

In recent years, due to problems such as energy conservation and noise, the residential space of human beings is gradually becoming airtight and insulated. However, the air in these closed spaces gradually changes to carbon dioxide and contaminates over time, thereby inhibiting the breathing of life.

Therefore, a place where many people stay in a narrow space, such as an office or a vehicle, needs to be frequently ventilated. In this case, a ventilation system using an electrothermal exchange method is usually used. This is for supplying the outside air while maintaining the indoor air temperature, and for exhausting the indoor air.

1 shows a perspective view of a conventional ventilator, a disassembled perspective view of a conventional ventilator, and FIG. 3 shows a configuration of a conventional total heat exchange element.

As shown in the drawing, the outside air inlet 12 is formed on one side of the main body case 10 forming the exterior so as to suck the outside air. A suction duct (not shown) is provided inside the external air inlet 12 to allow the external air sucked from the suction hole 12 to reach the heat exchanger 14 to be described below. ) Is formed to be a passage of external air.

In order to exchange heat between the air sucked from the outside and the air discharged from the outside to the outside, an electrothermal heat exchanger 14 as shown in FIG. 2 is provided at the inner center of the main body case 10. It is configured to have.

The heat exchanger 14 as described above normally exchanges moisture and sensible heat for exchanging latent heat by means of highly efficient heat exchange membranes forming layers of the different flow paths by allowing each air having a temperature difference to pass through different flow paths. Follow the principle of electrothermal exchange by heat.

The total heat exchanger (14) generally has a cross flow plate type structure. That is, an example of the total heat exchange element constituting the total heat exchanger 14 is shown in detail in FIG. 3, as shown in FIG. 3, in the total heat exchange element, a plurality of partition plates 15, which are specially processed paper, are stacked.

The partition plate 15 is generally made of a plastic material, and the partition plate 15 is provided with a gap plate 15 'of paper material corrugated in a bellows shape. On the other hand, the pleats of the spacer plate 15 'is generally formed to have a triangular cross section, and these pleats are formed to cross each other on each of the spacer plates 15' formed above and below.

That is, for example, as shown in detail in FIG. 3, when the spacer plate 15 ′ formed on the upper side of any partition plate 15 has wrinkles formed in the left and right directions, it is formed below the partition plate 15. Corrugations are formed in the front and rear directions on the spacer plate 15 '. Therefore, since the air supply and the exhaust pass through the heat exchanger 14 while crossing each other, the mixing of the air supply and the exhaust is prevented.

On the other hand, in the total heat exchange element, the partition plate 15 is made of plastic as described above, and the spacer plate 15 'is made of paper. On the contrary, the partition plate 15 is made of paper, and the spacer plate 15 is made of paper. ') May be made of plastic and bonded to each other.

The external air passing through the heat exchanger 14 from the external air inlet 12 is formed on the opposite side to the suction hole 12 by an external air supply unit (not shown) formed in the main body case 10. It is supplied into the room through the external air supply hole (16).

An indoor air intake port 18 through which indoor air is sucked into the main body case 10 of the ventilator is formed at a side of the external air supply hole 16. In addition, an indoor air exhaust hole 20 through which the indoor air sucked into the inside of the ventilator from the indoor air intake port 18 is formed at a side of the external air intake port 12.

The heat exchanger 14 has four heat exchanger support frames 22 formed long and long at four corners, and a pre-filter 24 is installed below the heat exchanger 14. The prefilter 24 serves to filter foreign matter mixed in the outside air, and the prefilter 24 is formed separately from the heat exchanger 14 and is detached.

On the other hand, the left and right sides of the heat exchanger as described above is provided with a fan (fan) for forcibly discharging the indoor air to the outside, and a fan (fan) for forcing the outdoor air into the room.

However, the conventional ventilation apparatus as described above has the following problems.

In the conventional structure as described above, when the partition plate 15 constituting the total heat exchange element is made of plastic, the spacer plate 15 'is made of paper. Therefore, the humidity (latent heat) exchange ability is excellent through the spacer plate 15 ', but the temperature (sensible heat) exchange ability is not excellent.

On the contrary, when the partition plate 15 is made of paper, and the spacer plate 15 'is made of plastic, the partition plate 15 is made of paper, and thus, heat transfer performance and durability are inferior. In addition, there is a problem that productivity is lowered during the process of joining the partition plate 15 and the spacer plate 15 'and lamination assembly.

On the other hand, when the partition plate 15 or the spacer plate 15 'is made of a paper material, since the durability is lowered, there is a problem that the replacement should be performed when used for a predetermined period.

Accordingly, an object of the present invention is to solve the problems of the prior art as described above, and to improve the heat transfer performance of the total heat exchanger provided in the ventilator.

Another object of the present invention is to reduce noise generated in the total heat exchanger of the ventilator.

Ventilation apparatus according to the present invention for achieving the above object is formed on one side of the main body case and the outside air inlet is an inlet for the outside air suction; An external air supply fan for forcibly blowing the air sucked from the external air inlet into the room; An external air outlet formed at one side of the external air inlet and serving as an outlet through which air blown by the air supply fan is blown into the room; An indoor air intake port formed on one side of the main body case and serving as an inlet for intake of indoor air; An indoor air exhaust fan that blows air that has passed through the indoor air inlet to the outside; An indoor air outlet formed on one side of the main body case and serving as an outlet through which the indoor air is discharged to the outside; An electrothermal heat exchanger including a plurality of electrothermal heat exchange elements configured to electrothermally exchange heat between the external air sucked from the external air inlet and the indoor air sucked from the indoor air intake; The total heat exchange element constituting the total heat exchanger is made of a conductive plastic material having a high heat transfer rate.

The electrothermal heat exchange element includes a partition plate for partitioning the flow path of the indoor air and the flow path of the outdoor air, and a gap forming portion protruding on one surface of the partition plate to allow the partition plates to be stacked at predetermined intervals. The plate and the gap forming portion are injection molded integrally.

On the other hand, the total heat exchange element is characterized in that made of a porous plastic material formed with a plurality of fine bubbles.

The total heat exchange element is characterized in that the supercritical fluid is mixed during injection molding to form a fine bubble.

The supercritical fluid is characterized in that the carbon dioxide (CO₂) or nitrogen (N₂).

According to the ventilator according to the present invention having such a configuration, there is an advantage that the heat transfer performance of the ventilator is improved and the noise is reduced.

4 is an exploded perspective view of an example of the ventilation device according to the present invention, Figure 5 shows the internal configuration of the ventilation device according to the present invention. 6A to 6D show various configurations of the total heat exchange element according to the present invention, and FIG. 7 shows a schematic configuration of a molding injection machine used to manufacture the total heat exchange element according to the present invention.

As shown in these figures, a substantially rectangular box-shaped body case 50 forms an appearance. The body case 50 forms the appearance of the entire product, and supports the installation of the internal structure to protect, and at the same time serves to block foreign matter from entering the product from the outside.

On the left side of the main body case 50, an external air inlet 52, which is an inlet for inhaling external air, is installed to protrude laterally. An inlet mounting hole (not shown) is formed at the left end of the main body case 50 so that the external air inlet 52 is inserted and fixed.

Inside the outside air inlet 52, a left suction duct 54 is disposed between the outside air intake 52 and the heat exchanger 60 so that the outside air drawn from the intake 52 can reach the heat exchanger 60, which will be described below. Is formed. That is, the left suction duct 54 serves as a suction passage that guides the outside air to be sucked smoothly.

An inner heat exchanger 60 is provided at an inner central portion of the main body case 50. The heat exchanger (60) generally has a hexagonal column shape, and a plurality of heat exchange elements (61) are stacked. In addition, the total heat exchange element 61 constituting the total heat exchanger is made of a conductive plastic material having a high heat transfer rate.

The heat exchange element 61 includes a partition plate 61 ′ that divides a flow path of indoor air and a flow path of outdoor air, and a gap forming portion 61 ″ protruding from one surface of the partition plate 61 ′. Therefore, when the plurality of partition plates 61 'as described above are stacked at predetermined intervals by the gap forming portion 61 ", the space between the partition plates 61' is indoor or outdoor air. Air flow path is formed.

6A to 6D show a cross-flow plate type total heat exchange element. That is, the gap forming portion 61 ″ is formed to protrude on one surface of the partition plate 61 ′ so that an air flow path is formed between the partition plates 61 ′ that are stacked. .

For example, FIG. 6A shows a first embodiment of a total heat exchange element having a partition plate 61 'of a plate and a gap forming portion 61 "having a triangular prism shape. That is, the partition plate 61' is shown. The gap forming portion 61 ″ formed in the gap forming portion 61 ″ is integrally formed with the partition plate 61 ′ so as to have a triangular cross section. To form.

When the partition plates 61 'are stacked, the partition plates 61' are stacked such that upper and lower gap forming portions 61 " are orthogonal to each other. In other words, the partition plates 61 'are formed on an upper surface of any partition plate 61'. If 61 "is formed to the left and right, the space forming part 61" formed in the partition plate 61 'stacked on the upper or lower portion of the partition plate 61' is installed to be formed back and forth.

Therefore, if a space on one floor becomes the discharge passage of the outdoor air, the upper or lower floor of the floor serves as the suction passage of the indoor air.

Meanwhile, in the second embodiment shown in FIG. 6B, an embossing is formed on the upper surface of the partition plate 61 ′ to serve as the gap forming portion 61 ″. Thus, the partition plate laminated by the embossing A predetermined interval is formed between the 61's.

In the third embodiment shown in FIG. 6C, an S-shaped gap forming part 61 ″ is formed on the upper surface of the partition plate 61 ′. Thus, air is formed in the S-shaped gap. As it flows through the gap forming portion 61 ″, it is subjected to total heat exchange with the gap forming portion 61 ″ and the partition plate 61 ′.

6D shows a fourth embodiment of the total heat exchange element according to the present invention. That is, a partition plate 61 'is provided, and a fin forming portion 61 " is formed integrally on the upper surface of the partition plate 61'. Thus, air is partitioned. While flowing through the space between '), it comes into contact with the fin-shaped gap forming portion 61 ″.

As a result, the fin FIN increases the contact area between the air and the total heat exchange element 61, thereby improving the total heat exchange performance.

On the other hand, the total heat exchange element 61 is made of a porous plastic material. That is, a plurality of fine bubbles are formed on the surface of the total heat exchange element 61, and these bubbles are formed by a supercritical fluid that is introduced and mixed when the total heat exchange element 61 is injection molded.

FIG. 7 shows a configuration of a molding injection machine for injection molding the electrothermal exchange element 61. As shown in the drawing, the molten plastic is injected into the cylinder 72 of the injection molding machine 70 through the plastic supply pipe 74, and the cylinder 72 is further formed with a supercritical fluid supply pipe 76. Critical fluid is introduced into the cylinder 72 to be mixed with the plastic.

Supercritical fluid refers to a fluid in a critical state, and refers to a material having both fluid and gas properties. In this case, carbon dioxide (CO₂) or nitrogen (N₂) is mainly used as the supercritical fluid.

That is, although not shown, in the supercritical fluid supply device to make a foaming gas such as carbon dioxide (CO₂) or nitrogen (N₂) in a supercritical state, and then the injection molding machine 70 through the supercritical fluid supply pipe 76 It is injected into the cylinder 72 of the plastic resin and the supercritical fluid is mixed, it is injected into a mold to form the total heat exchange element (61).

When the plastic resin is injection-molded in a state where the supercritical fluid is mixed as described above, and the heat exchange element 61 is formed, fine bubbles are generated inside the heat exchange element 61. In other words, the space where the supercritical fluid becomes a gas is bubbled.

The total heat exchanger (60) having the configuration as described above performs electrothermal exchange between the air supply and the exhaust in the apparatus, absorbs the heat of the air from the exhaust going to the outside, and transfers it to the air supplied to the room, whereby the state of the indoor air is To be less affected by

This electrothermal ventilation mode may be implemented by the user's selection. That is, in general, the heat transfer ventilation mode as described above is mainly used in summer and winter when the temperature difference between the indoor and outdoor is large, and when the temperature difference between the indoor and outdoor is not so large, such as spring or autumn, the damper 94 to be described below By changing the passage of the air discharged to the outside to prevent the air exhausted to pass through the heat exchanger 60, it is also possible to use in the normal ventilation mode.

On the other hand, the upper and lower surfaces of the main body case 50 is provided with a support frame 62 for supporting the heat exchanger 60 long before and after. The support frame 62 supports the load of the heat exchanger 60 so that the heat exchanger 60 is firmly supported and also serves as a guide rail when the front heat exchanger 60 is attached and detached.

The support frame 62 is symmetrically formed to face each other on the upper and lower surfaces of the body case 50, the guide frame for guiding the heat exchanger 60 to slide forward and backward in the support frame 62. (64, 64 ') are formed. That is, a predetermined portion protrudes upward from the left side of the support frame 62 to form the left guide protrusion 64, and a right guide protrusion 64 ′ from which the predetermined portion protrudes upward from the right side is formed. .

In addition, the exchange guide 66 is further installed at the left and right edges of the total heat exchanger 60. The exchange guide 66 is elongated back and forth to support the side end of the heat exchanger 60 and to guide the front and rear movement. In addition, the exchange guide 66 may be further formed with a filter support (not shown) in which the filter 68, which will be described below, is slidably inserted forward and backward.

A filter 68 is installed on the lower left side of the total heat exchanger 60. The filter 68 filters the foreign matter in the air sucked from the outside. That is, the filter 68 filters the foreign matter mixed with the outside air to increase cleanliness of the air supplied to the room, and protects the heat exchanger 60 from the foreign matter.

In addition, the pre-heat exchanger 60 is generally provided with two before and after, such a pre-heat exchanger 60 is supported by the support frame 62 of the pre-heat exchanger 60 and slide back and forth. Therefore, the front surface of the heat exchanger 60 is further provided with a handle 71 to facilitate the forward and backward movement.

The left rear end of the main body case 50 is provided with an indoor air outlet 56 for discharging the indoor air to the outside, the outlet 56 is an outlet mounting hole (not shown) formed in the main body case 50 Is inserted and fixed). In addition, a left discharge duct 58 is formed inside the outlet mounting hole to guide the indoor air forcedly blown by the exhaust fan 100 to the indoor air outlet 56.

An external air outlet 82 is formed at the right end of the main body case 50, that is, on the side opposite to the position at which the external air inlet 52 is installed. The outlet 82 is inserted into the outlet mounting hole 84 formed on the right side of the main body case 50 and is installed to protrude in a right direction from the right side of the main body case 50 to the right side. In addition, a right exhaust duct 86 is formed inside the outlet mounting hole 84 to guide the external air forcedly blown from the air supply fan 150 to the outlet 82.

The right side end of the main body case 50, that is, the indoor air inlet 88 is provided on the opposite side of the position where the indoor air outlet 56 is installed. The indoor air inlet 88 is installed to protrude from the right side of the main body case 50 to the right side, and is fixed to the circular indoor inlet mounting hole 90 formed at the rear end of the right side of the main body case 50. do. In addition, a right suction duct 92 is formed inside the indoor suction hole mounting hole 90 to guide the air sucked from the indoor air suction hole 88 to the heat exchanger 60.

On the other hand, a damper 94 is provided inside the right suction duct 92 to selectively flow the indoor air sucked through the indoor air suction port 88 to the heat exchanger 60. That is, the damper 94 opens and closes the right suction duct 92 under the control of the control box 200 to be described below. Therefore, if the damper 94 shields the right suction duct 92, the indoor air sucked through the indoor air intake port 88 does not pass through the heat exchanger 60, and the indoor air outlet 56 Is discharged to the outside through).

The indoor air exhaust fan 100 is provided between the indoor air outlet 56 and the external air inlet 52. The exhaust fan 100 serves to forcibly blow the air sucked through the indoor air inlet 88 to the outlet 56, and is preferably composed of a siroco fan.

An air supply fan 150 having the same shape as the exhaust fan 100 is installed between the external air outlet 82 and the indoor air outlet 56 to forcibly send external air to the external air outlet 82. do. Therefore, the external air sucked through the external air inlet 52 is guided to the right exhaust duct 86 by the air supply fan 150 and discharged into the room through the external air outlet 82.

The control box 200 is installed at the right end of the main body case 50. A control unit is formed inside the control box 200 to control the operating conditions of the ventilation device. That is, the power supply is interrupted to turn on / off the ventilator, and the fan speed is controlled by controlling fan rotation speeds of the air supply fan 150 and the exhaust fan 100. On the other hand, by controlling the driver (not shown) of the damper 94 controls the ventilation method to enable the selection of the total heat exchange mode or the general ventilation mode.

On the front of the main body case 50 is a ceiling fixture 202 is installed so that the ventilation device is installed on the ceiling of the building. In addition, a check hole 204 is formed at the front center portion of the main body case 50. An inspection door 206 is provided on the front surface of the inspection opening 204 to selectively open and close the inspection opening 204. Therefore, when it is necessary to replace or check the heat exchanger 60, the inspection door 206 can be opened and the heat exchanger 60 can be taken out to work.

Meanwhile, a fan housing 210 is formed outside the exhaust fan 100 and the air supply fan 150. The fan housing 210 is formed to surround the exhaust fan 100 and the air supply fan 150.

Hereinafter, a state in which air outside the room flows through the ventilator according to the present invention having the configuration as described above will be described with reference to FIGS. 8 and 9.

8 shows a state of air flow through the ventilator when the electrothermal ventilation mode is operated. This heat transfer mode is generally used when there is a large difference in temperature and humidity between indoors and outdoors, such as summer or winter.

As shown in the drawing, the damper 94 opens the right suction duct 92 according to a control command in the control box 200 according to the user's selection of the heat transfer ventilation mode.

In addition, according to the operation of the air supply fan 150, external air is sucked into the ventilation device through the external air inlet 52, and the external air is guided by the left suction duct 54 to transfer the heat. It is sucked into the total heat exchanger (60) through the lower left side of the exchanger (60). At this time, since the external air passes through the filter 68 mounted on the lower left side of the heat exchanger 60, foreign matter in the air is first filtered and then sucked into the heat exchanger 60.

The air sucked into the heat exchanger (60) exchanges heat and moisture from the discharged indoor air and then is discharged through the upper right side of the heat exchanger (60).

Air passing through the heat exchanger (60) is forcibly blown by the air supply fan (150) and guided to the right exhaust duct (86) so as to be installed on the right side of the main body case (50). Through 82).

On the other hand, the indoor air is exhausted to the outside by the operation of the exhaust fan 100, the indoor air is sucked into the ventilator through the indoor air intake port 88 and then guided by the right suction duct 92 And is sucked into the total heat exchanger (60) through the lower right side of the total heat exchanger (60).

The indoor air sucked into the heat exchanger (60) exchanges heat and moisture to outside air sucked from the outside, and then exits through the lower left side of the heat exchanger (60). Indoor air exiting the heat exchanger (60) is forcibly blown by the exhaust fan (100) and guided to the left exhaust duct (58) to be provided at the rear end of the left side of the main body case (50). It is exhausted to the outside through the outlet 56.

Next, an air flow state in the general ventilation mode will be described with reference to FIG. 9. In the general ventilation mode, when indoor and outdoor temperature and humidity differences are small, such as spring or autumn, indoor air is bypassed by the heat exchanger 60 and bypassed immediately.

Therefore, when the user selects the general ventilation mode, the damper 94 shields the right suction duct 92 according to a control command inside the control box 200. In this case, the air sucked through the indoor air intake port 88 is forcibly blown to the indoor air outlet 56 and discharged to the outside without passing through the heat exchanger 60.

On the other hand, when looking at the flow of the outside air, according to the operation of the air supply fan 150, the outside air is sucked into the ventilator through the outside air inlet 52, the outside air is the left side suction duct (54) It is guided by) and is sucked into the heat exchanger 60 through the lower left side of the heat exchanger (60). At this time, since the external air passes through the filter 68 mounted on the lower left side of the heat exchanger 60, foreign matter in the air is first filtered and then sucked into the heat exchanger 60.

Since the air sucked into the heat exchanger (60) does not pass through the heat exchanger (60), the discharged indoor air is discharged through the upper right side of the heat exchanger (60) without exchanging heat and moisture.

Air passing through the heat exchanger (60) is forcibly blown by the air supply fan (150) and guided to the right exhaust duct (86) so as to be installed on the right side of the main body case (50). Through 82).

As described above, in the general ventilation mode, unlike in the case of the total heat ventilation mode, heat and moisture are not exchanged inside the heat exchanger 60.

The scope of the present invention is not limited to the above-exemplified embodiments, and many other modifications based on the present invention will be possible to those skilled in the art within the above technical scope.

In the ventilator according to the present invention as described above, the total heat exchange element consisting of a partition plate and a gap forming part was integrally injection molded from a plastic material having good conductivity.

Therefore, the heat exchange efficiency of the outdoor air and the indoor air that cross each other in the total heat exchanger is improved, and injection molding is performed at a time, thereby improving productivity.

In addition, the electrothermal exchange element can be formed in various ways. That is, in the electrothermal heat exchange element composed of the partition plate and the gap forming portion, the gap forming portion is formed in various shapes to increase the contact area with air. Thus, the heat transfer performance is improved.

In addition, the electrothermal exchange element is integrally manufactured by injection molding, in which a supercritical fluid is injected into the injection molding machine to be mixed with the plastic resin. Therefore, when the total heat exchange element is molded and ejected, a plurality of fine bubbles are formed inside and on the surface.                     

Thus, if the heat exchange element is formed porous, the heat transfer area is increased, and the humidity is well transferred, so that the overall heat transfer performance of the heat exchanger is improved.

On the other hand, since the total heat exchange element is porous, there is an effect of absorbing sound waves. Therefore, the advantage of reducing the noise generated by the air flow is also expected.

Claims (6)

delete delete An external air inlet formed on one side of the main body case and serving as an inlet for intake of external air; An external air supply fan for forcibly blowing the air sucked from the external air inlet into the room; An external air outlet formed at one side of the external air inlet and serving as an outlet through which air blown by the air supply fan is blown into the room; An indoor air intake port formed on one side of the main body case and serving as an inlet for intake of indoor air; An indoor air exhaust fan that blows air that has passed through the indoor air inlet to the outside; An indoor air outlet formed on one side of the main body case and serving as an outlet through which the indoor air is discharged to the outside; A plurality of heat exchange elements comprising a partition plate for partitioning the flow path of the indoor air and the flow path of the outdoor air and a gap forming portion integrally formed on one surface of the partition plate to stack the partition plates at predetermined intervals, A heat exchanger configured to allow heat exchange between the sucked external air and the indoor air sucked from the indoor air suction port; The total heat exchange device constituting the total heat exchanger is made of a porous conductive plastic material having a plurality of fine bubbles, the partition plate and the gap forming portion is a ventilation device, characterized in that formed integrally by injection molding. The ventilator according to claim 3, wherein the micro bubbles formed in the total heat exchange element are formed by mixing a supercritical fluid during injection molding of the total heat exchange element. The ventilator of claim 4, wherein the supercritical fluid is carbon dioxide (CO2). The ventilator according to claim 4, wherein the supercritical fluid is nitrogen (N2).

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