KR20220031812A - Ventilation system and controlling method thereof - Google Patents

Abstract

The present invention relates to a ventilation system and a control method thereof. According to an embodiment of the present invention, a ventilation system comprises: a humidity control module (10) for controlling the humidity of the outdoor air by exchanging moisture between the outdoor air supplied from the outside and the indoor exhaust discharged from the indoor using the difference in water vapor partial pressure; a sensible heat exchanger (20) for controlling the temperature of the outside air by exchanging heat between the outdoor air that has passed through the humidity control module (10) and the indoor exhaust before entering the humidity control module (10); an outdoor air passage unit (30) including a first outdoor air passage (31) for guiding the outdoor air to the humidity control module (10), a second outdoor air passage (33) for guiding the outdoor air passing through the humidity control module (10) to the sensible heat exchanger (20), and a third outdoor air passage (35) for guiding the outdoor air passing through the sensible heat exchanger (20) into the room; and an indoor exhaust passage unit (40) including a first indoor exhaust passage (41) for guiding the indoor exhaust to the sensible heat exchanger (20), a second indoor exhaust passage (43) for guiding the indoor exhaust passing through the sensible heat exchanger (20) to the humidity control module (10), and a third indoor exhaust passage (45) for guiding the indoor exhaust passing through the humidity control module (10) to the outdoors.

Description

VENTILATION SYSTEM AND CONTROLLING METHOD THEREOF

The present invention relates to a ventilation system and a method for controlling the same.

Recently, as high insulation and airtightness of residential buildings for energy saving and soundproofing have become a trend in the construction industry, interest in ventilation devices that substantially improve the indoor air environment is increasing. A ventilation device is a device that creates a comfortable indoor environment by discharging indoor air to the outdoors and supplying outdoor air to the room. However, when there is a large difference in temperature between indoors and outdoors, such as in summer and winter, ventilation causes a decrease in cooling and heating efficiency. As a method for solving this problem, a ventilation device using a total heat exchanger has been developed as disclosed in the patent documents of the prior art documents below. In the total heat exchanger, heat exchange elements are installed to mutually exchange heat so that indoor air and outdoor air are maintained at a similar temperature to each other, thereby preventing a decrease in cooling and heating efficiency.

However, in the conventional total heat exchanger type ventilation device, since the total heat exchanger exchanges moisture and heat together, when the indoor air contains a large amount of moisture or the temperature difference between the indoor air and the outdoor air is large, the moisture difference or temperature difference As a result, there is a problem in that the device is damaged due to condensation or freezing.

Accordingly, there is an urgent need for a method to solve the problems of the conventional ventilation system.

KR 10-0628058 B1

The present invention is to solve the problems of the prior art described above, and one aspect of the present invention is to control the humidity of the outside air by applying a membrane-based humidity control module that exchanges substances (moisture) using the difference in water vapor partial pressure with the indoor exhaust. Another object of the present invention is to provide a ventilation system for supplying air to a room by controlling the temperature of outside air in a sensible heat exchanger.

Another aspect of the present invention is to provide a ventilation system capable of preventing condensation or freezing of humidified outside air by heating outside air flowing into a humidity control module when the temperature difference between indoors and outdoors is large.

Furthermore, another aspect of the present invention is to provide a ventilation system control method for operating the ventilation system in three modes according to outdoor and outdoor environmental conditions.

A ventilation system according to an embodiment of the present invention includes: a humidity control module for controlling the humidity of the outdoor air by exchanging moisture between outdoor air supplied from the outdoors and indoor exhaust discharged from the indoor using a difference in water vapor partial pressure; a sensible heat exchanger configured to control the temperature of the outside air by exchanging heat between the outdoor air that has passed through the humidity control module and the indoor exhaust before flowing into the humidity control module; A first outdoor air passage for guiding the outdoor air to the humidity control module, a second outdoor air passage for guiding the outdoor air passing through the humidity control module to the sensible heat exchanger, and a second outdoor air passage for guiding the outdoor air passing through the sensible heat exchanger into the room 3 an outdoor air passage including an outdoor air passage; and a first indoor exhaust passage guiding the indoor exhaust to the sensible heat exchanger, a second indoor exhaust passage guiding the indoor exhaust passing through the sensible heat exchanger to the humidity control module, and the indoor exhaust passing through the humidity control module. and an indoor exhaust passage unit including a third indoor exhaust passage guiding to the outdoors.

In addition, in the ventilation system according to an embodiment of the present invention, the humidity control module includes: a plurality of hollow fiber membranes, the outside air being introduced into each end to be discharged to the other end, and arranged in parallel with each other; a first perforated plate having a plurality of first through-holes communicating one-to-one with one end of the plurality of hollow fiber membranes; a second perforated plate having a plurality of second through-holes communicating one-to-one with the other ends of the plurality of hollow fiber membranes; and fixing the first perforated plate and the second perforated plate to face each other, a plurality of hollow fiber membranes are disposed therein, and the hollow fiber membranes interposed therebetween in a direction crossing the longitudinal direction of the hollow fiber membranes and a housing having an indoor exhaust inlet through which the indoor exhaust is introduced, and an indoor exhaust outlet through which the indoor exhaust is discharged.

In addition, in the ventilation system according to an embodiment of the present invention, an outdoor air bypass passage connecting the first outdoor air passage and the third outdoor air passage by bypassing the humidity control module and the sensible heat exchanger; and a damper that opens and closes the outdoor air bypass passage.

In addition, in the ventilation system according to an embodiment of the present invention, it is disposed in the third outdoor air passage, the outdoor air supply fan (fan) for controlling the flow rate of the outdoor air supplied to the room; may further include.

In addition, in the ventilation system according to an embodiment of the present invention, an indoor exhaust exhaust fan disposed in the third indoor exhaust passage and controlling a flow rate of the indoor exhaust discharged to the outdoors; may further include there is.

In addition, in the ventilation system according to an embodiment of the present invention, it is disposed in the first outdoor air passage, the heater unit for heating the outdoor air flowing in from the outdoors; may further include.

In addition, in the ventilation system according to an embodiment of the present invention, it is disposed in the first outdoor air passage, the filter unit for filtering the outdoor air flowing in from the outdoors; may further include.

In addition, in the ventilation system according to an embodiment of the present invention, a carbon dioxide sensor for measuring the concentration of carbon dioxide in the room; and a flow rate controller configured to control a flow rate of the outdoor air supplied to the room and a flow rate of the indoor exhaust discharged to the outdoors based on the measured carbon dioxide concentration.

Meanwhile, in the ventilation system control method according to an embodiment of the present invention, in the ventilation system control method for controlling the ventilation system described above, (a) the outdoor air supplied from the outdoors and the indoor exhaust exhausted from the interior, respectively measuring the temperature and relative humidity of (b) calculating absolute humidity and enthalpy of each of the outdoor air and the indoor exhaust based on the measured temperature and relative humidity; and (c) operating the ventilation system in a plurality of modes based on the calculated absolute humidity and the enthalpy, but operating in the first mode when the calculated absolute humidity of the outdoor air is less than or equal to the absolute humidity of the indoor exhaust and, in the first mode, humidifying the outdoor air through the moisture exchange between the outdoor air introduced into the humidity control module and the indoor exhaust; flowing the humidified outdoor air to the sensible heat exchanger and heating the outdoor air through heat exchange with the indoor exhaust; and supplying the humidified and heated outdoor air to the room.

In addition, in the method for controlling a ventilation system according to an embodiment of the present invention, in the step of humidifying the outdoor air in the first mode, the outdoor air may be heated and then introduced into the humidity control module.

In addition, in the ventilation system control method according to an embodiment of the present invention, in step (c), the calculated absolute humidity of the outdoor air exceeds the absolute humidity of the indoor exhaust, and the calculated enthalpy of the outdoor air is When the enthalpy of exhaust is less than or equal to the enthalpy of the exhaust, the second mode operates in a second mode, omitting the moisture exchange and the heat exchange with respect to the outdoor air, and supplying the outdoor air from the outdoor to the indoor; can

In addition, in the ventilation system control method according to an embodiment of the present invention, in the second mode, at least a portion of the outdoor air may be supplied to the room by bypassing the humidity control module and the sensible heat exchanger.

In addition, in the ventilation system control method according to an embodiment of the present invention, in step (c), the calculated absolute humidity of the outdoor air exceeds the absolute humidity of the indoor exhaust, and the calculated enthalpy of the outdoor air is When the enthalpy of exhaust is exceeded, operating in a third mode, wherein the third mode includes: dehumidifying the outdoor air through the moisture exchange between the outdoor air and the indoor exhaust flowing into the humidity control module; flowing the dehumidified outdoor air to the sensible heat exchanger and cooling the outdoor air through heat exchange with the indoor exhaust; and supplying the dehumidified and cooled outdoor air to the indoor space.

In addition, in the ventilation system control method according to an embodiment of the present invention, in step (a), the concentration of carbon dioxide in the room is measured, and in step (c), the measured concentration of carbon dioxide is 1,000 ppm or more. At this time, at least one or more of a flow rate of the outdoor air supplied to the room and a flow rate of the indoor exhaust discharged to the outside may be adjusted.

The features and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings.

Prior to this, the terms or words used in the present specification and claims should not be construed in the ordinary and dictionary meaning, and the inventor may properly define the concept of the term to describe his invention in the best way. Based on the principle that there is, it should be interpreted as meaning and concept consistent with the technical idea of the present invention.

According to the present invention, ventilation necessary for a building is performed, and since the sensible and latent heat loads of outdoor air are separated and processed, outdoor air loads can be efficiently handled through seasonal operation modes according to indoor and outdoor air conditions.

In addition, by supplying outdoor air to the primary side of the humidity control module and indoor exhaust to the secondary side, moisture is exchanged using the difference in water vapor partial pressure to control dehumidification/cooling and humidification/heating using only the transportation power. Energy savings can be expected.

Furthermore, it is possible to solve the problem of corrosion inside the ventilation system due to condensation or freezing, which has been raised in the ventilation apparatus of the conventional total heat exchange method.

1 is a block diagram of a ventilation system according to an embodiment of the present invention.
FIG. 2 is a perspective view of the humidity control module shown in FIG. 1 ;
3 is a block diagram of a ventilation system according to another embodiment of the present invention.
4 is a block diagram of a ventilation system according to another embodiment of the present invention.
5 to 6 are flowcharts of a ventilation system control method according to an embodiment of the present invention.
7 is a flowchart of a ventilation system control method according to another embodiment of the present invention.

The objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings and preferred embodiments. In the present specification, in adding reference numbers to the components of each drawing, it should be noted that only the same components are given the same number as possible even though they are indicated on different drawings. Also, terms such as “first” and “second” are used to distinguish one component from another, and the component is not limited by the terms. Hereinafter, in describing the present invention, detailed descriptions of related known technologies that may unnecessarily obscure the gist of the present invention will be omitted.

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

1 is a block diagram of a ventilation system according to an embodiment of the present invention.

As shown in Figure 1, the ventilation system according to the embodiment of the present invention uses the difference in water vapor partial pressure to exchange moisture between the outdoor air supplied from the outdoors and the indoor exhaust discharged from the indoor to control the humidity of the outdoor air. Humidity control module (10), a sensible heat exchanger (20) that controls the temperature of the outside air by exchanging heat between the outside air that has passed through the humidity control module (10) and the indoor exhaust before entering the humidity control module (10), and the outside air is humidity controlled The first outdoor air passage 31 guiding to the module 10, the second outdoor air passage 33 guiding the outdoor air passing through the humidity control module 10 to the sensible heat exchanger 20, and the sensible heat exchanger 20 The outdoor air passage part 30 including the third outdoor air passage 35 for guiding outdoor air into the room, and the first indoor exhaust passage 41 for guiding the indoor exhaust to the sensible heat exchanger 20 and the sensible heat exchanger 20 are provided. An interior including a second indoor exhaust passage 43 for guiding the indoor exhaust passing through to the humidity control module 10 and a third indoor exhaust passage 45 for guiding the indoor exhaust passing through the humidity control module 10 to the outdoors and an exhaust passage portion 40 .

The present invention relates to a ventilation system for discharging polluted indoor air to the outdoors and supplying outdoor air to the room in order to keep indoor air of a main building comfortable. Conventional ventilation devices for exchanging indoor and outdoor air have low heating and cooling efficiency when there is a large indoor/outdoor temperature difference, and a ventilation device employing a total heat exchanger to improve cooling and cooling efficiency has a problem of internal corrosion due to condensation or freezing. A ventilation system according to the present invention has been devised as a method for solving the problems of the ventilation system.

Specifically, the ventilation system according to the embodiment of the present invention includes a humidity control module 10 , a sensible heat exchanger 20 , an outdoor air passage unit 30 , and an indoor exhaust passage unit 40 .

In the humidity control module 10, outdoor air supplied from the outdoors flows into the primary side, indoor exhaust discharged from the room flows into the secondary side, and between the outdoor and indoor exhaust by using the difference in water vapor partial pressure between the introduced outdoor and indoor exhaust. It is implemented as a device for exchanging moisture in Therefore, when the temperature of the outside air is higher than the temperature of the indoor exhaust, since the partial pressure of water vapor in the outdoor air is relatively high, moisture in the outdoor air, that is, water vapor, moves to the indoor exhaust, and the outdoor air is dehumidified. On the other hand, when the temperature of the outdoor air is lower than the temperature of the indoor exhaust and thus the partial pressure of water vapor in the outdoor air is relatively low, since the water vapor in the indoor exhaust moves to the outdoor air, the outdoor air is humidified. As a result, the humidity control module 10 dehumidifies or humidifies the outdoor air by processing the latent heat load in the outdoor air or indoor exhaust using the difference in partial pressure of water vapor between the outdoor air and the indoor exhaust. The specific configuration of the humidity control module 10 to function in this way will be described later. The dehumidified or humidified outside air passing through the humidity control module 10 flows to the sensible heat exchanger 20 .

The sensible heat exchanger 20 is a device provided to control the temperature of the outside air. If the temperature difference between the outdoor air supplied to the room and the indoor exhaust discharged to the outside is large, the cooling and heating efficiency decreases. The sensible heat exchanger 20 controls the temperature of the outside air through heat exchange between the outside air and the indoor exhaust. At this time, the outdoor air flowing into the sensible heat exchanger 20 is the dehumidified or humidified outdoor air passing through the humidity control module 10 , and the indoor exhaust is the indoor exhaust before flowing into the humidity control module 10 . That is, the outdoor air sequentially passes through the humidity control module 10 and the sensible heat exchanger 20 , and the indoor exhaust sequentially passes through the sensible heat exchanger 20 and the humidity control module 10 . After all, in the case of the present invention, since moisture exchange and heat exchange between the outdoor and indoor exhaust are separated by location, the latent heat and sensible heat loads are treated separately. Accordingly, when the temperature of the outside air is higher than that of the indoor exhaust, the outside air dehumidified in the humidity control module 10 is cooled while passing through the sensible heat exchanger 20 . On the other hand, when the temperature of the outside air is lower than that of the indoor exhaust, the outside air humidified in the humidity control module 10 is heated while passing through the sensible heat exchanger 20 . The dehumidified/cooled and humidified/heated outside air flows into the room.

The outdoor air passage 30 provides a passage through which the outdoor air can flow into the room through the humidity control module 10 and the sensible heat exchanger 20 . The outdoor air passage part 30 includes a first outdoor air passage 31 , a second outdoor air passage 33 , and a third outdoor air passage 35 that are connected to communicate with each other, and the first outdoor air passage 31 and A humidity control module 10 is disposed between the second outdoor air passage 33 , and a sensible heat exchanger 20 is disposed between the second outdoor air passage 33 and the third outdoor air passage 35 . Accordingly, the outside air is first guided to the humidity control module 10 by the first outdoor air passage 31 , and after passing through the humidity control module 10 , is secondary to the sensible heat exchanger 20 by the second outdoor air passage 33 . Guided, passing through the sensible heat exchanger (20) is guided to the interior by the third outdoor air passage (35) for the third time.

The indoor exhaust passage part 40 provides a passage through which the indoor exhaust flows through the sensible heat exchanger 20 and the humidity control module 10 to the outdoors. The indoor exhaust passage part 40 may be formed by connecting the first indoor exhaust passage 41 , the second indoor exhaust passage 43 , and the third indoor exhaust passage 45 to communicate with each other. The sensible heat exchanger 20 is disposed between the indoor exhaust passage 41 and the second indoor exhaust passage 43 , and the humidity control module 10 is disposed between the second indoor exhaust passage 43 and the third indoor exhaust passage 45 . do. Accordingly, the indoor exhaust is primarily guided to the sensible heat exchanger 20 by the first indoor exhaust passage 41 , and after passing through the sensible heat exchanger 20 , the humidity control module 10 is guided by the second indoor exhaust passage 43 . It is guided secondarily to the air conditioner, and after passing through the humidity control module 10, it is guided to the outside by the third indoor exhaust passage 45 for the third time.

FIG. 2 is a perspective view of the humidity control module 10 shown in FIG. 1 . Hereinafter, the humidity control module 10 will be described with reference to FIG. 2 .

The humidity control module 10 may include a plurality of hollow fiber membranes 11 , a first porous plate 13 , a second porous plate 15 , and a housing 17 .

The hollow fiber membrane 11 is a member in which a porous membrane having a plurality of micropores on an outer peripheral surface is formed in the form of a hollow tube. Both ends of the hollow fiber membrane 11 are opened and communicated with the internal hollow, and outside air is introduced into the open end to pass through the inside, and then flows out to the other open end. A plurality of these hollow fiber membranes 11 are arranged in parallel with each other, that is, one end of each hollow fiber membrane 11 faces the same one direction, and the other ends face the same opposite other direction. Here, when the outdoor air passes through the plurality of hollow fiber membranes 11 , the indoor exhaust flows to the outside of the hollow fiber membrane 11 . It moves through the micropores of (11). Both ends of the plurality of hollow fiber membranes 11 are fixed by the first porous plate 13 and the second porous plate 15 .

The first perforated plate 13 and the second perforated plate 15 are plate-shaped members, and are disposed to face each other. Here, the first perforated plate 13 has a plurality of first through-holes 13a penetrating the plate surface, and the second perforated plate 15 also includes a plurality of second through-holes 15a penetrating the plate surface. to provide The plurality of first through-holes 13a are connected in one-to-one communication with one end of the plurality of hollow fiber membranes 11 , and the plurality of second through-holes 15a are connected one-to-one with the other ends of the plurality of hollow fiber membranes 11 . connected to communicate. As a result, one end of the hollow fiber membrane 11 is connected to the first through hole 13a and the other end is connected to the second through hole 15a.

The housing 17 accommodates a plurality of hollow fiber membranes 11 therein, and fixes the first perforated plate 13 and the second perforated plate 15 to face each other. In addition, the housing 17 is provided with an indoor exhaust inlet 17a and an indoor exhaust outlet 17b so that the indoor exhaust can contact the outside of the hollow fiber membrane 11 . Here, the indoor exhaust flows in a direction crossing the longitudinal direction of the hollow fiber membrane 11 . Accordingly, the indoor exhaust inlet 17a for introducing indoor exhaust into the interior and the indoor exhaust outlet 17b for discharging the inlet indoor exhaust to the outside are hollow in a direction intersecting the longitudinal direction of the hollow fiber membrane 11 , With the desert 11 interposed therebetween, they are formed to face each other.

According to the humidity control module 10 , a plurality of hollow fiber membranes 11 through which outside air passes are arranged side by side, and since the indoor exhaust flows in a direction crossing the longitudinal direction of the hollow fiber membrane 11 , it comes into contact with the indoor exhaust. By increasing the area of the hollow fiber membrane 11, it is possible to improve the latent heat exchange performance.

On the other hand, the ventilation system according to the embodiment of the present invention may further include a heater (90). The heater unit 90 is disposed in the first outdoor air passage 31 , and heats the outdoor air flowing toward the humidity control module 10 . When the ventilation system is operated in winter when the temperature of the outside air is very low, the temperature difference with the indoor exhaust is large, so the outside air passing through the humidity control module 10 and the sensible heat exchanger 20 is heated through the heater unit 90 . By doing so, it is possible to prevent the occurrence of condensation or freezing of the humidified outside air.

3 is a block diagram of a ventilation system according to another embodiment of the present invention.

As shown in FIG. 3 , the ventilation system in another embodiment of the present invention may further include an outdoor air bypass passage 50 , and a damper 60 .

The outdoor air bypass passage 50 is a passage connecting the first outdoor air passage 31 and the third outdoor air passage 35 without passing through the second outdoor air passage 33 . Accordingly, the outdoor air flowing along the first outdoor air passage 31 may bypass the humidity control module 10 and the sensible heat exchanger 20 and directly move to the third outdoor air passage 35 and be supplied to the room.

The damper 60 is a device for opening and closing the outdoor air bypass passage 50 , and blocks the flow of outdoor air moving from the first outdoor air passage 31 to the third outdoor air passage 35 or controls the flow amount thereof. The damper 60 may be provided in the connection area of the first outdoor air passage 31 and the outdoor air bypass passage 50 and in the connection area of the outdoor air bypass passage 50 and the third outdoor air passage 35, respectively, but it must be It is not limited and one or more may be installed.

Here, all of the outdoor air flowing into the first outdoor air passage 31 from the outdoors may flow through the outdoor air bypass passage 50, but optionally some of them pass through the outdoor air bypass passage 50 and the other portion is controlled by humidity. After passing through the module 10 and the sensible heat exchanger 20 , they may be combined in the third outdoor air passage 35 .

For example, when ventilation is performed without controlling the humidity or temperature of the outdoor air, all of the outdoor air introduced into the first outdoor air passage 31 may be supplied to the room through the outdoor air bypass passage 50 . At this time, the indoor exhaust is discharged to the outdoors through the indoor exhaust passage part 40 . On the other hand, even in the case of controlling the humidity or temperature of the outside air, the outside air introduced into the first outdoor air passage 31 is divided, some of which goes through the outdoor air bypass passage 50, and the humidity or temperature is adjusted only for the other part. In this case, it is possible to control the humidity or temperature by combining them.

In addition, the ventilation system according to another embodiment of the present invention may further include a filter unit (100). The filter unit 100 is disposed in the first outdoor air passage 31 to filter the outdoor air introduced from the outside. Accordingly, the filtered outdoor air may be supplied into the room by passing through the humidity control module 10 and the sensible heat exchanger 20 , and passing through the heater unit 90 and the outdoor air bypass passage 50 .

On the other hand, the ventilation system according to another embodiment of the present invention may further include an outdoor air supply fan (fan, 70). The outdoor air supply fan 70 is disposed in the third outdoor air passage 35 to adjust the flow rate of the outdoor air supplied to the room. Since the required ventilation amount may vary according to the environmental conditions of the room, the ventilation amount may be controlled by adjusting the air volume of the outdoor air supply fan 70 .

In addition, the ventilation system according to another embodiment of the present invention may further include an indoor exhaust exhaust fan (fan, 80). The indoor exhaust exhaust fan 80 is disposed in the third indoor exhaust passage 45 to adjust the flow rate of indoor exhaust discharged to the outdoors. The indoor exhaust exhaust fan 80 operates in conjunction with the outdoor air supply fan 70 to control the ventilation amount.

4 is a block diagram of a ventilation system according to another embodiment of the present invention.

Referring to FIG. 4 , the ventilation system according to another embodiment of the present invention may further include a carbon dioxide sensor 110 , and a flow rate controller 120 .

The carbon dioxide sensor 110 is a sensor that measures the concentration of carbon dioxide (CO ₂ ), and measures the indoor carbon dioxide concentration. In order to supply the required ventilation amount according to the number of occupants of the building, by installing the carbon dioxide sensor 110 in the room, it is possible to calculate the required ventilation demand for each hour through the measured indoor carbon dioxide concentration.

The flow rate controller 120 may control the flow rate of outdoor air supplied to the room and the flow rate of indoor exhaust discharged to the outdoors based on the measured concentration of carbon dioxide. For example, the flow rate controller 120 may control the supply flow rate of outdoor air and the discharge flow rate of indoor exhaust by adjusting the air volume of the outdoor air supply fan 70 and/or the indoor exhaust exhaust fan 80 . In addition, opening and closing of the damper 60 may be controlled.

Overall, according to the ventilation system according to the present invention, the ventilation system according to the present invention performs necessary ventilation for a building and separates and processes the sensible and latent heat loads of outdoor air, so that outdoor air loads can be efficiently handled through seasonal operation modes according to indoor and outdoor air conditions there is. In addition, by supplying outdoor air to the primary side of the humidity control module 10 and indoor exhaust to the secondary side, moisture is exchanged using the difference in water vapor partial pressure to control dehumidification/cooling and humidification/heating using only transportation power, so the building heating/cooling load Energy saving effect can be expected through reduction. Furthermore, it is possible to solve the problem of corrosion inside the ventilation system due to condensation or freezing, which has been raised in the ventilation apparatus of the conventional total heat exchange method.

Hereinafter, a method for controlling a ventilation system according to an embodiment of the present invention will be described. As described above for the ventilation system, the overlapping matters will be omitted or simply described.

5 to 6 are flowcharts of a ventilation system control method according to an embodiment of the present invention.

5 to 6 , in the ventilation system control method according to an embodiment of the present invention, in the ventilation system control method described above, the temperature of each of the outdoor air supplied from the outdoors and the indoor exhaust exhausted from the indoor and measuring the relative humidity (S100), calculating the absolute humidity and enthalpy of each of the outdoor and indoor exhaust air based on the measured temperature and relative humidity (S200), and based on the calculated absolute humidity and enthalpy , the ventilation system is operated in a plurality of modes, and when the calculated absolute humidity of the outdoor air is less than or equal to the absolute humidity of the indoor exhaust, the step of operating in the first mode (S300), wherein the first mode is introduced into the humidity control module humidifying outdoor air through moisture exchange between the heated outdoor air and indoor exhaust, flowing the humidified outdoor air to a sensible heat exchanger, heating the outdoor air through heat exchange with the indoor exhaust, and moving the humidified and heated outdoor air into the room including supplying.

The ventilation system control method according to the present invention relates to a method for controlling the operation of the ventilation system described above in various modes, and includes a step (S100) of measuring the temperature and relative humidity of outdoor and indoor exhaust, and a step of calculating absolute humidity and enthalpy (S200). ), and the operation mode selection step (S300).

In the measuring step (S100) of the temperature and relative humidity of the outdoor air and indoor exhaust, the temperature and relative humidity information of the outdoor air and the indoor exhaust is acquired by measuring the temperature and relative humidity of the outdoor and the indoor through a thermometer and a hygrometer.

In the absolute humidity and enthalpy calculation step ( S200 ), the absolute humidity and enthalpy of each of the outdoor air and indoor exhaust are calculated based on the measured temperature and relative humidity of the outdoor and indoor exhaust.

In the operation mode selection step ( S300 ), any one of various modes of the ventilation system is selected and operated based on the calculated absolute humidity and enthalpy of the outdoor and indoor exhaust.

First, the absolute humidity of the outdoor air and the absolute humidity of the indoor exhaust are compared, and when the absolute humidity of the outdoor air is less than or equal to the absolute humidity of the indoor exhaust, the operation is performed in the first mode (MODE 1). For example, the vehicle may be driven in the first mode in winter. In the first mode, the humidity control module (MD) and the sensible heat exchanger (SHX) are operated (ON). Accordingly, the humidity control module MD humidifies the outside air through moisture exchange between the outside air and the indoor exhaust. Then, the humidified outside air flows into the sensible heat exchanger (SHX). At this time, since the indoor exhaust flows into the humidity control module MD after passing through the sensible heat exchanger SHX, heat exchange occurs between the outdoor air humidified in the sensible heat exchanger SHX and the indoor exhaust, and the outdoor air is heated. In this way, external air humidified and heated to a humidity and temperature similar to that of indoor exhaust is supplied to the room to ventilate the room.

In addition, in the case of driving in the first mode, if the temperature difference between the outdoor and indoor exhaust is large, condensation and icing of the humidified outdoor air may become a problem. After heating the outside air, the outside air may be introduced into the humidity control module (MD).

In the first mode, by closing a damper to prevent outside air from flowing through the above-described outside air bypass passage, all of the outside air supplied from the outside can be humidified and heated to be supplied to the room.

Meanwhile, when the calculated absolute humidity of outdoor air exceeds the absolute humidity of indoor exhaust and the calculated enthalpy of outdoor air is less than or equal to the enthalpy of indoor exhaust, the ventilation system may be operated in the second mode (MODE 2). For example, it may be operated in the second mode in an intermediate period between summer and winter.

Since the indoor/outdoor environment operated in the second mode does not have a large difference in temperature and humidity between indoors and outdoors, in the second mode, the humidity control module (MD) and the sensible heat exchanger (SHX) are not operated (OFF), that is, moisture is exchanged between the outdoor and indoor exhaust. and outside air can be directly supplied from the outside to the inside while omitting the heat exchange. To this end, by opening a damper so that the outside air flows along the outside air bypass passage, outside air can be supplied to the room by bypassing the humidity control module MD and the sensible heat exchanger SHX. In addition, when it is necessary to control the humidity and temperature of the outside air in the second mode, some of the outside air bypasses the humidity control module (MD) and the sensible heat exchanger (SHX), and the other part bypasses the humidity control module (MD) and the sensible heat exchanger (SHX) can be driven through

Meanwhile, when the calculated absolute humidity of the outdoor air exceeds the absolute humidity of the indoor exhaust and the enthalpy of the outdoor air exceeds the enthalpy of the indoor exhaust, the ventilation system may be operated in the third mode (MODE 3). For example, the vehicle may be driven in the third mode in summer. In the third mode, the humidity control module (MD) and the sensible heat exchanger (SHX) are operated (ON). Accordingly, the humidity control module MD dehumidifies the outside air through moisture exchange between the outside air and the indoor exhaust. Next, the dehumidified outdoor air flows into the sensible heat exchanger (SHX). At this time, since the indoor exhaust flows into the humidity control module MD after passing through the sensible heat exchanger (SHX), heat exchange occurs between the outdoor air and the indoor exhaust dehumidified in the sensible heat exchanger (SHX) to cool the outdoor air. In this way, outside air dehumidified and cooled to a humidity and temperature similar to that of indoor exhaust is supplied to the room to ventilate the room.

7 is a flowchart of a ventilation system control method according to another embodiment of the present invention.

Referring to FIG. 7, the ventilation system control method according to another embodiment of the present invention measures the indoor carbon dioxide concentration, and when the carbon dioxide concentration is 1,000 ppm or more, the flow rate of outdoor air supplied to the room, and the At least one of the flow rates of the indoor exhaust may be adjusted. Here, the measurement of the concentration of indoor carbon dioxide may be performed together in the step of measuring the temperature and relative humidity of the outdoor air and the indoor exhaust. However, the measurement of carbon dioxide does not necessarily have to be performed in the step of measuring the temperature and relative humidity of the outdoor and indoor exhaust. The measurement of carbon dioxide is to calculate the required ventilation amount according to the number of occupants of the building. When the measured carbon dioxide concentration is 1,000 ppm or more, the flow rate of outdoor air supplied to the room and/or the flow rate of indoor exhaust exhausted to the outside can be additionally adjusted. . In this case, the flow rate of the outdoor air and the flow rate of the indoor exhaust may be adjusted by controlling the airflow amount of the above-described outdoor air supply fan and indoor exhaust exhaust fan.

Although the present invention has been described in detail through specific examples, this is for the purpose of describing the present invention in detail, and the present invention is not limited thereto. It is clear that the modification or improvement is possible.

All simple modifications or changes of the present invention are within the scope of the present invention, and the specific scope of protection of the present invention will be made clear by the appended claims.

10: humidity control module 11: hollow fiber membrane
13: first perforated plate 13a: first through hole
15: second perforated plate 15a: second through hole
17: housing 17a: indoor exhaust inlet
17b: indoor exhaust outlet 20: sensible heat exchanger
30: outdoor air passage 31: first outdoor air passage
33: second outdoor air passage 35: third outdoor air passage
40: indoor exhaust passage part 41: first indoor exhaust passage
43: second indoor exhaust passage 45: third indoor exhaust passage
50: outside air bypass passage 60: damper
70: outdoor air supply fan 80: indoor exhaust exhaust fan
90: heater unit 100: filter unit
110: carbon dioxide sensor 120: flow control unit

Claims (14)

a humidity control module for controlling the humidity of the outdoor air by exchanging moisture between the outdoor air supplied from the outside and the indoor exhaust discharged from the indoor using the difference in water vapor partial pressure;
a sensible heat exchanger configured to control the temperature of the outside air by exchanging heat between the outdoor air that has passed through the humidity control module and the indoor exhaust before flowing into the humidity control module;
A first outdoor air passage for guiding the outdoor air to the humidity control module, a second outdoor air passage for guiding the outdoor air passing through the humidity control module to the sensible heat exchanger, and a second outdoor air passage for guiding the outdoor air passing through the sensible heat exchanger into the room 3 an outdoor air passage including an outdoor air passage; and
a first indoor exhaust passage for guiding the indoor exhaust to the sensible heat exchanger, a second indoor exhaust passage for guiding the indoor exhaust passing through the sensible heat exchanger to the humidity control module, and the indoor exhaust passing through the humidity control module; A ventilation system comprising a; indoor exhaust passage portion including a third indoor exhaust passage for guiding to the outdoors.
The method according to claim 1,
The humidity control module is
a plurality of hollow fiber membranes in which the outside air is introduced into one end and discharged to the other end, and arranged in parallel with each other;
a first perforated plate having a plurality of first through-holes communicating one-to-one with one end of the plurality of hollow fiber membranes;
a second perforated plate having a plurality of second through-holes communicating one-to-one with the other ends of the plurality of hollow fiber membranes; and
The first perforated plate and the second perforated plate are fixed to face each other, the plurality of hollow fiber membranes are disposed therein, and the hollow fiber membrane is interposed therebetween in a direction crossing the longitudinal direction of the hollow fiber membrane. A ventilation system comprising: a housing in which an indoor exhaust inlet for introducing exhaust gas and an indoor exhaust outlet for discharging indoor exhaust are formed.
The method according to claim 1,
an outdoor air bypass passage connecting the first outdoor air passage and the third outdoor air passage by bypassing the humidity control module and the sensible heat exchanger; and
The ventilation system further comprising a; damper for opening and closing the outdoor air bypass passage.
The method according to claim 1,
The third outdoor air passage is disposed in the outdoor air supply fan (fan) for controlling the flow rate of the outdoor air supplied to the room; ventilation system further comprising a.
The method according to claim 1,
and an indoor exhaust exhaust fan disposed in the third indoor exhaust passage and configured to control a flow rate of the indoor exhaust discharged to the outdoors.
The method according to claim 1,
The ventilation system further comprising a; disposed in the first outdoor air passage, the heater for heating the outdoor air flowing in from the outdoors.
The method according to claim 1,
The ventilation system further comprising a; disposed in the first outdoor air passage, the filter unit for filtering the outdoor air flowing in from the outdoors.
The method according to claim 1,
a carbon dioxide sensor for measuring the concentration of carbon dioxide in the room; and
Based on the measured carbon dioxide concentration, a flow rate control unit for controlling the flow rate of the outdoor air supplied to the room and the flow rate of the indoor exhaust discharged to the outside; Ventilation system further comprising a.
In the ventilation system control method for controlling the ventilation system according to any one of claims 1 to 8,
(a) measuring the temperature and relative humidity of each of the outdoor air supplied from the outdoors and the indoor exhaust discharged from the indoor;
(b) calculating absolute humidity and enthalpy of each of the outdoor air and the indoor exhaust based on the measured temperature and relative humidity; and
(c) operating the ventilation system in a plurality of modes based on the calculated absolute humidity and the enthalpy, but operating in the first mode when the calculated absolute humidity of the outdoor air is less than or equal to the absolute humidity of the indoor exhaust step; including;
The first mode is
humidifying the outdoor air through the moisture exchange between the outdoor air introduced into the humidity control module and the indoor exhaust;
flowing the humidified outdoor air to the sensible heat exchanger and heating the outdoor air through heat exchange with the indoor exhaust; and
Ventilation system control method comprising a; supplying the humidified and heated outdoor air to the room.
10. The method of claim 9,
In the step of humidifying the outdoor air in the first mode, the ventilation system control method in which the outdoor air is heated and then introduced into the humidity control module.
10. The method of claim 9,
In step (c), when the calculated absolute humidity of the outdoor air exceeds the absolute humidity of the indoor exhaust and the calculated enthalpy of the outdoor air is less than or equal to the enthalpy of the indoor exhaust, the second mode is operated;
The second mode is
Ventilation system comprising a; omitting the moisture exchange and the heat exchange with respect to the outdoor air, and supplying the outdoor air from the outdoor to the indoor.
12. The method of claim 11,
In the second mode, at least a portion of the outdoor air is supplied to the room by bypassing the humidity control module and the sensible heat exchanger.
10. The method of claim 9,
In step (c), when the calculated absolute humidity of the outdoor air exceeds the absolute humidity of the indoor exhaust and the calculated enthalpy of the outdoor air exceeds the enthalpy of the indoor exhaust, the third mode is operated,
The third mode is
dehumidifying the outdoor air through the moisture exchange between the outdoor air introduced into the humidity control module and the indoor exhaust;
flowing the dehumidified outdoor air to the sensible heat exchanger and cooling the outdoor air through heat exchange with the indoor exhaust; and
A ventilation system control method comprising a; supplying the dehumidified and cooled outside air to the room.
10. The method of claim 9,
In step (a), measuring the concentration of carbon dioxide in the room,
In the step (c), when the measured concentration of carbon dioxide is 1,000 ppm or more, a ventilation system for controlling at least one or more of the flow rate of the outdoor air supplied to the room and the flow rate of the indoor exhaust discharged to the outdoors control method.

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