KR102059727B1 - Multifunctional ventilation unit - Google Patents

Abstract

A multifunctional ventilation unit according to an embodiment of the present invention is a casing having a first outer and a second outer mechanism connected to the outside and the first inner and a second inner mechanism connected to the indoor, and disposed in the casing to the interior A heat exchanger configured to exchange heat between the outdoor air to be introduced and the indoor air to be discharged to the outside, and a first interposed between the heat exchanger and one inner wall of the casing and bypassing the heat exchanger to connect the first external device to the first internal device. A bypass flow path, a second bypass flow path provided between the heat exchanger and the other inner wall of the casing, bypassing the heat exchanger to connect the second external device and the second internal device, and opening and closing the first bypass flow path. A first bypass damper for opening and closing, a second bypass damper for opening and closing the second bypass flow path, a first ventilation damper for opening and closing the first external device, and A second ventilation damper for opening and closing an external device, a comprehensive filter part provided in one region between the first bypass flow path, the heat exchanger, and the first internal device, and bypassing the comprehensive filter part; And a switching damper that opens and closes the filter bypass flow path.

Description

Multifunctional ventilation unit {MULTIFUNCTIONAL VENTILATION UNIT}

The present invention relates to a multifunctional ventilation unit, and more particularly to a multifunctional ventilation unit used for indoor environment control.

In recent years, insulation standards have been tightened to minimize energy loss in residential buildings. Accordingly, the heat recovery ventilation unit is applied to the air conditioning system used in the building to reduce the loss of thermal energy.

In general, the heat recovery ventilation unit is a device for recovering the heat amount of the indoor return air by heat-exchanging the air discharged from the indoor to the outdoor when the exhaust air and the air introduced into the indoor when the air supply. These ventilation units are divided into sensible heat exchange and total heat exchange. The sensible heat exchange method uses a heat exchanger made of a plastic material or a metal material such as aluminum. The sensible heat exchange method utilizes a sensible heat and latent heat, and uses a heat exchanger made of a paper material.

 However, when ventilation is performed at a temperature below zero where the outdoor air temperature is very low, condensation is generated in the heat exchanger due to the temperature difference between the outdoor air and the indoor air. And the dew condensation starts to freeze from the adjacent areas due to the low temperature of the outdoor air. When the condensation is frozen, the airflow passage inside the heat exchanger is blocked, and the exhaust air volume is drastically reduced. Accordingly, as the heat exchange efficiency decreases rapidly, very cold air flows into the room.

Therefore, conventionally, the electric heater is used to suppress the generation of condensation in the heat exchanger. In the case of the total heat exchange method, in principle, an electric heater is installed to prevent condensation at the source, but when the ventilation unit is actually operated, it exposes a problem of weakness, low durability, and difficulty in maintenance.

In addition, in the case of the sensible heat exchange method is relatively strong in water and excellent in durability, but in order to eliminate the problems caused by condensation, the same is necessary for the electric heater.

By the way, the ventilation unit for heat recovery is to reduce the loss of thermal energy, if the electric heater is used to operate the ventilation unit, there is a problem that it is meaningless to return the heat energy using the ventilation unit by using additional electricity. .

In addition, the conventional heat recovery ventilation unit performs only a simple ventilation function in a standardized operation regardless of environmental changes of outdoor air and indoor air.

Specifically, even though the temperature difference between the outdoor air and the indoor air is not large, it is not necessary to perform heat exchange. However, since the outdoor air and the indoor air pass through the heat exchanger, the static pressure is always kept high inside the ventilation unit. The higher the static pressure inside the ventilation unit, the more energy is consumed in the operation of the supply and exhaust fans as well as the noise.

In addition, the conventional ventilation unit has not been able to rapidly deal with the situation in which the indoor air is rapidly polluted, such as a gas leak, to perform the ventilation rapidly.

In addition, in recent years, a social problem caused by fine dust has been raised, a filter for removing various foreign matters including fine dust during ventilation is mounted inside the ventilation unit. However, the mounting of such a filter is another cause of the height of raising the static pressure inside the ventilation unit.

Patent Registration No. 10-0765164 (2007.10.12)

Embodiments of the present invention provide a multifunctional ventilation unit that suppresses freezing of a heat exchanger and improves energy efficiency.

In addition, an embodiment of the present invention provides a multi-functional ventilation unit that can not only purify the indoor air, but also purifies the external contaminants such as fine dust during ventilation to supply the indoor air.

According to an embodiment of the present invention, the multi-functional ventilation unit has a casing having a first outer and a second outer mechanism connected to the outside and a first inner and a second inner mechanism connected to the indoor, and disposed in the casing and indoors. A heat exchanger configured to exchange heat between the outdoor air to be introduced into the air and the indoor air to be discharged to the outside, and provided between the heat exchanger and one inner wall of the casing to bypass the heat exchanger to connect the first external device to the first internal device. A first bypass flow path, a second bypass flow path provided between the heat exchanger and the other inner wall of the casing, and bypassing the heat exchanger to connect the second external device and the second internal device, and the first bypass flow path. A first bypass damper for opening and closing, a second bypass damper for opening and closing the second bypass flow path, a first ventilation damper for opening and closing the first external device, and A second ventilation damper for opening and closing a second external device, a comprehensive filter part provided in one region between the first bypass flow path, the heat exchanger, and the first internal device, and the first internal device by bypassing the comprehensive filter part; And a switching damper for opening and closing the filter bypass flow passage connected to the filter bypass flow passage.

The multifunctional ventilation unit may further include an air supply fan disposed relatively to the first internal mechanism, and an exhaust fan disposed relatively to the second internal mechanism.

In addition, the multi-functional ventilation unit is measured by the indoor sensor unit for measuring the environmental information of the indoor, the outdoor sensor unit for measuring the environmental information of the outdoor, and the user's desired indoor environment and the indoor sensor unit and the outdoor sensor unit And a controller configured to control operations of the first bypass damper, the second bypass damper, the first ventilation damper, the second ventilation damper, and the switching damper in consideration of the indoor environment information and the outdoor environment information. Can be.

The controller may be classified according to a mode selected from a plurality of modes including at least two of a heat exchange purifying ventilation mode, a heat exchange purifying ventilation mode, a rapid purifying ventilation mode, a rapid clean ventilation mode, an indoor circulation purifying mode, and a heat exchanger thawing mode. The operation of the first bypass damper, the second bypass damper, the first ventilation damper, the second ventilation damper, and the switching damper may be respectively controlled.

The heat exchange purification ventilation mode and the heat exchange purification ventilation mode may be selected when heating or cooling is being performed indoors. The heat exchange purification ventilation mode is selected when the outdoor air is polluted more than the indoor air or to be ventilated with a relatively small amount of air, and the heat exchange clean ventilation mode is used when the outdoor air is cleaner than the indoor air or to be ventilated with a relatively large air volume. Can be selected.

In the heat exchange purifying ventilation mode, the control unit opens the first ventilation damper and the second ventilation damper, closes the first bypass damper, the second bypass damper, and the switching damper to the indoor air and the indoor air that flows out to the outside. The incoming outdoor air may be heat exchanged in the heat exchanger, and the air introduced into the room may be moved through the comprehensive filter unit.

In the heat exchange clean ventilation mode, the control unit opens the first ventilation damper, the second ventilation damper, and the switching damper, and closes the first bypass damper and the second bypass damper to the indoor air and the indoor air flowing out. The introduced outdoor air may be heat-exchanged in the heat exchanger, and the air introduced into the room may be moved by bypassing the comprehensive filter unit.

The rapid clean ventilation mode may be selected when the indoor air temperature is higher than the outdoor air temperature, is higher than the user's desired temperature, and the outdoor air is cleaner than the indoor air, or is ventilated with a relatively large air volume, or the indoor air is greatly contaminated and urgent ventilation is required. Can be. In the rapid clean ventilation mode, the amount of ventilation air may be relatively high among the plurality of modes by bypassing the heat exchanger and the comprehensive filter unit.

In the rapid clean ventilation mode, the controller may open all of the first ventilation damper, the second ventilation damper, the first bypass damper, the second bypass damper, and the switching damper.

The rapid purifying ventilation mode may be selected when the indoor air temperature is higher than the outdoor air temperature and higher than the user's desired temperature, but the outdoor air is contaminated than the indoor air or a relatively small amount of air is to be vented. In the rapid purification ventilation mode, the air exchanger bypasses the heat exchanger to allow the indoor air to flow out to the outside and the outdoor air to flow into the interior, but the air flowing into the interior moves through the comprehensive filter unit, so that the amount of ventilation air is relatively higher than that of the rapid clean ventilation mode. This can be low.

In the rapid purification ventilation mode, the controller may open the first ventilation damper, the second ventilation damper, the first bypass damper, and the second bypass damper, and close the switching damper.

The indoor circulation purification mode is selected to purify the indoor air, and in the indoor circulation purification mode, indoor air may be moved back to the interior through the heat exchanger and the comprehensive filter unit.

In the indoor circulation purification mode, the controller may close the first ventilation damper, the second ventilation damper, and the switching damper, and open the first bypass damper and the second bypass damper.

The heat exchanger thawing mode may be selected when the temperature of one side of the heat exchanger facing the first external device becomes less than a predetermined reference temperature during operation in the heat exchange purifying ventilation mode or the heat exchange purifying ventilation mode.

The multifunctional ventilation unit may further include a temperature sensor for measuring the temperature of one side of the heat exchanger facing the first external device.

In the heat exchanger thawing mode, the controller may open the first ventilation damper and close the second ventilation damper, the first bypass damper, the second bypass damper, and the switching damper.

The control unit may close the first ventilation damper and the second ventilation damper and open the first bypass damper, the second bypass damper, and the switching damper in the heat exchanger thawing mode.

In addition, in the heat exchanger thawing mode, the controller may close the first ventilation damper, the second ventilation damper, and the second bypass damper and open the first bypass damper and the switching damper.

A drain plate and a drain pipe for draining condensation generated in the heat exchanger in the heat exchanger thawing mode may be connected to the bottom of the heat exchanger. The remaining water drained through the drain plate and the drain pipe may be dried by indoor air passing through the heat exchanger in the heat exchanger thawing mode.

According to the embodiment of the present invention, the multifunctional ventilation unit can suppress the freezing of the heat exchanger and improve energy efficiency without a separate device.

In addition, according to an embodiment of the present invention, the multifunctional ventilation unit may not only purify indoor air but also purify external contaminants such as fine dust during ventilation and supply it to the room.

1 is a block diagram of a multifunctional ventilation unit according to an embodiment of the present invention.
2 is a configuration diagram showing a state in which the multifunctional ventilation unit of FIG. 1 is operating in a heat exchange purifying ventilation mode.
3 is a configuration diagram illustrating a state in which the multifunctional ventilation unit of FIG. 1 is operating in a heat exchange clean ventilation mode.
4 is a configuration diagram illustrating a state in which the multifunctional ventilation unit of FIG. 1 is operating in the rapid clean ventilation mode.
5 is a configuration diagram illustrating a state in which the multifunctional ventilation unit of FIG. 1 is operating in the rapid purification ventilation mode.
6 is a configuration diagram showing a state in which the multifunctional ventilation unit of FIG. 1 is operating in the indoor circulation purification ventilation mode.
7 to 9 are views illustrating a state in which the multifunctional ventilation unit of FIG. 1 is operating in a heat exchanger thawing mode.
FIG. 10 shows one aspect of a heat exchanger used in the multifunctional ventilation unit of FIG. 1.
FIG. 11 is a graph illustrating a time point at which the multifunction exchange unit of FIG. 1 is switched to a heat exchanger thawing mode.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

It is noted that the figures are schematic and not drawn to scale. The relative dimensions and ratios of the parts in the figures are shown exaggerated or reduced in size for clarity and convenience in the figures and any dimensions are merely exemplary and not limiting. And the same reference numerals are used to refer to similar features in the same structure, element or part shown in more than one figure.

Embodiments of the invention specifically illustrate ideal embodiments of the invention. As a result, various modifications of the drawings are expected. Thus, the embodiment is not limited to the specific form of the illustrated region, but includes, for example, modification of the form by manufacture.

Hereinafter, the multifunctional ventilation chamber unit 301 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 11. Multifunctional ventilation unit 301 according to an embodiment of the present invention can supply the outdoor air to the indoor air and exhaust the indoor air to the outside, it is also possible to improve the air quality of the air flowing into the room. For example, the multifunctional ventilation unit 301 may be applied to an indoor environment control system that independently controls an environment of a room partitioned into a plurality of spaces.

As shown in FIG. 1, the multifunctional ventilation unit 301 according to the exemplary embodiment may include a casing 390, a heat exchanger 350, a first bypass flow path 311, and a second bypass flow path 312. ), The first bypass damper 341, the second bypass damper 342, the first ventilation damper 331, the second ventilation damper 332, the comprehensive filter unit 360, the filter bypass flow path 316, And a switching damper 370.

In addition, as shown in Figure 1, the multi-function ventilation unit 301 according to an embodiment of the present invention, the air supply fan 381, exhaust fan 382, temperature sensor 357, drain plate 358, drain pipe ( 359, an indoor sensor 321, an outdoor sensor 322, and a controller 400 may be further included.

In addition, the multifunctional ventilation unit 301 according to an embodiment of the present invention may further include pre-filters 365 and 366 and partition walls 395.

The casing 390 includes a first external device 391 and a second external device 392 connected to the outdoors, and a first internal device 393 and a second internal device 394 connected to the interior. In addition, the casing 390 may be made of a galvanized steel sheet, and to keep the inside to suppress the generation of condensation, the inner and outer leakage rate is made to be 3% or less.

The first ventilation damper 331 opens and closes the first external device 391, and the second ventilation damper 332 opens and closes the second external device 392. For example, the first ventilation damper 331 and the second ventilation damper 332 may be driven by a synchronous motor in a circular shape.

The heat exchanger 350 is disposed in the casing 390 to exchange heat between the outdoor air to be introduced into the room and the indoor air to be discharged to the outside. In one embodiment of the present invention, the heat exchanger 350 may be made of a plastic or metal material, and may have a heat exchange rate of about 85% by cleaning.

Specifically, the heat exchanger 350 has four sides through which air flows in and out. Of the four sides of the heat exchanger 350, the first side 351 faces the first exterior 391, the second side 352 faces the second exterior 392, and the third side 353. Is directed toward the first internal mechanism 393, and the fourth side 354 is directed towards the second internal mechanism 394. The first side 351 is connected to the third side 353 and the second side 352 is connected to the fourth side 354. Therefore, the air passing through the first side surface 351 and the third side surface 353 and the air passing through the second side surface 352 and the fourth side surface 354 cross each other in the heat exchanger 350 and thus heat exchange is performed. Is done.

In addition, the heat exchanger 350 has a relatively high air resistance inside the casing 390.

The partition 395 guides the moving direction of the air so that the outdoor air and the indoor air are not mixed inside the casing 390. In detail, the partition 395 may be formed from the casing 390 between the first external device 391 and the second external device 392 to the heat exchanger 350, or the first internal device 393 and the second device. It may be formed from the casing 390 between the inner mechanism 394 to the heat exchanger 350. In addition, the partition 395 may be formed at both positions described above. That is, in FIG. 1, the partition 395 is disposed between the first internal mechanism 393 and the second internal mechanism 394 from the boundary of the third side surface 353 and the fourth side surface 354 of the heat exchanger 350. Although casing 390 is formed, one embodiment of the present invention is not limited thereto.

The first bypass flow path 311 is provided between the heat exchanger 350 and one inner wall of the casing 390. The first bypass flow path 311 bypasses the heat exchanger 350 to connect the first external device 391 and the first internal device 393.

The second bypass flow path 312 is provided between the heat exchanger 350 and the other inner wall of the casing 390. The second bypass flow path 312 bypasses the heat exchanger 350 to connect the second external device 392 and the second internal device 394.

The first bypass damper 341 opens and closes the first bypass flow path 311, and the second bypass damper 342 opens and closes the second bypass flow path 312. In detail, the first bypass damper 341 opens and closes a space between the boundary of the first side surface 351 and the third side surface 353 of the heat exchanger 350 and the casing 390. That is, when the first bypass damper 341 closes the space between the boundary of the first side 351 and the third side 353 of the heat exchanger 350 and the casing 390, the air passes through the space. You will not be able to. The second bypass damper 342 opens and closes the space between the boundary of the second side 352 and the fourth side 354 of the heat exchanger 350 and the casing 390. That is, when the second bypass damper 342 closes the space between the boundary of the second side 352 and the fourth side 354 of the heat exchanger 350 and the casing 390, the air passes through the space. You will not be able to. Also, as an example, the first bypass damper 341 and the second bypass damper 342 may be circularly driven by a synchronous motor.

The comprehensive filter unit 360 is provided in one region between the first bypass flow path 311 and the heat exchanger 350 and the first internal mechanism 393. The comprehensive filter unit 360 may filter various harmful substances contained in the air. The comprehensive filter unit 360 is used to improve the air quality of the indoor air, and may include various filters. In this specification, factors for evaluating air quality are among the average radiation temperature (MRT), relative humidity (RH), carbon dioxide (CO ₂ ), organic compound (VOC), ultrafine dust (PM 2.5), and formaldehyde. It may include one or more. That is, the comprehensive filter unit 360 is provided to filter at least one of organic compounds (VOC), ultrafine dust (PM 2.5), and formaldehyde (Formaldehyde). In addition, as an example, the comprehensive filter unit 360 may include a cleaning prefilter, a fine dust filter, a deodorizing filter, a sterilization device, and the like.

In addition, when the integrated filter unit 360 is used for a certain period of time, maintenance is required. That is, the filter built in the comprehensive filter unit 360 should be replaced or washed. However, these filters are generally replaced at regular intervals regardless of the quality of the outdoor air or the degree of contamination of the filter. Therefore, it can be used continuously even in a situation where the filter is rapidly polluted and does not perform well. In this case, various problems such as indoor inflow of dust, deterioration of ventilation efficiency, and increase in current consumption of the air supply fan 393 are caused. In addition, replacement may occur even though the filter does not need to be replaced yet.

However, in one embodiment of the present invention, the control unit 400 may automatically determine the replacement time of the comprehensive filter unit 360 to display or notify the user. According to one embodiment of the present invention, by measuring the change in the number of revolutions and the amount of current consumption of the air supply fan 393 to estimate the degree of contamination of the filter built in the integrated filter unit 360 to determine the replacement time of the filter. That is, in one embodiment of the present invention, when the filter is contaminated and the resistance of the air passing through the filter is increased, that is, the static pressure increases, the amount of current consumption of the air supply fan 393 is reduced. Can be identified.

Specifically, for example, the rotation speed and the consumption current amount of the air supply fan 393 when the filter built in the integrated filter unit 360 is contaminated enough to be replaced are determined as replacement criteria, and the measured air supply fan ( When the rotational speed and the consumption current amount of 393 reach the aforementioned replacement criterion, the controller 400 may transmit a filter replacement signal to the user.

In addition, the controller 400 determines the rotational time N ₀ of the air supply fan 393 and the amount of current consumption A ₀ in an uncontaminated initial filter state to determine a main filter replacement time built in the integrated filter unit 360. If the value obtained by subtracting the rotational speed N ₁ and the current consumption amount A ₁ of the currently measured air supply fan 393 exceeds a predetermined range may be determined as a filter replacement time.

In addition, the current consumption of the air supply fan 393 and the current consumption of the air supply fan 393 serving as a replacement standard in the unfiltered initial filter state may be set in various ways according to the environment in which the multifunctional ventilation unit 301 is installed. have.

As described above, in one embodiment of the present invention, the replacement time of the filter is determined using the principle that the amount of current consumption changes according to the increase or decrease of the static pressure loss due to the contamination of the filter.

However, the current amount of the air supply fan 393 may also change depending on factors other than the degree of contamination of the filter. Therefore, even when the filter is not replaced, the controller 400 may incorrectly determine that the filter is replaced.

Thus, in an embodiment of the present invention, all components of the multifunctional ventilation unit 301 are operated under the same conditions at regular intervals in order to stably secure the accuracy of the determination of the filter replacement time to determine the filter replacement time. Accordingly, it is possible to prevent the determination of the filter replacement time from being inaccurate due to other variables. In one example, the constant cycle may be once daily.

In addition, when the multi-function ventilation unit 301 operates in a mode other than a mode for checking the state of the filter, the controller 400 determines that the filter replacement time is the filter replacement time even if the current consumption amount of the air supply fan 393 reaches the filter replacement criterion. I never do that. That is, when the multi-function ventilation unit 301 operates in the mode set to grasp the state of the filter at regular intervals and the measured current consumption amount reaches the replacement criterion only when the current consumption amount of the air supply fan 393 is measured, the controller 400. Sends a filter replacement signal to the user.

The filter bypass passage 316 bypasses the comprehensive filter unit 360 and is connected to the first internal mechanism 393, and the switching damper 370 opens and closes the filter bypass passage 316. Therefore, when the switching damper 370 is opened, since the air filter has a relatively high air resistance, the air is directed to the first internal mechanism 393 through the filter bypass flow path 316. On the contrary, when the switching damper 370 is closed, the air is directed to the first internal mechanism 393 via the comprehensive filter unit 360.

As such, the switching damper 370 may select a movement path of air directed to the first internal mechanism 393. That is, according to the opening / closing state of the switching damper 370, the air directed to the first internal mechanism 393 may or may not selectively pass through the comprehensive filter unit 360. If the air moves through the synthesis filter 360, the air quality can be greatly improved, but the back pressure (背壓) is increased to reduce the moving speed of the air. As such, when the static pressure inside the multifunctional ventilation unit 301 increases, the load of the air supply fan 381 and the exhaust fan 382 increases, so that energy is not only consumed more and noise is also increased. On the other hand, when the air moves without passing through the comprehensive filter unit 360, the air can move quickly, it is possible to rapidly ventilate by moving the air by bypassing the comprehensive filter unit 360 as necessary.

The prefilters 365 and 366 may be installed at the second side 352 and the fourth side 354 of the heat exchanger 350, and may be installed at the filter bypass flow path 316. In one embodiment of the present invention, the pre-filters (365, 366) can be separated and washed and used for filtering foreign matter of relatively large size, such as hair, lint, hair, large dust. In addition, as the prefilters 365 and 366, a filter having a level that does not increase the static pressure inside the multifunctional ventilation unit 300 may be used. These prefilters 365 and 366 are water washable and relatively excellent in durability. In addition, in one embodiment of the present invention, the prefilters 365 and 366 are not necessarily required and may be omitted.

The air supply fan 381 is disposed adjacent to the first internal mechanism 393 to supply air to the room through the first internal mechanism 393. The exhaust fan 382 is disposed relatively adjacent to the second internal mechanism 394 to suck air from the room through the second internal mechanism 394. However, an embodiment of the present invention is not limited to the above description, and the installation positions of the air supply fan 381 and the exhaust fan 382 may be changed. For example, the air supply fan 381 and the exhaust fan may be a double-suction sirocco fan.

The indoor sensor unit 321 measures indoor environment information. The indoor sensor unit 321 may measure not only the temperature but also one or more of radiation temperature, humidity, air quality, and illuminance. In addition, although the indoor sensor unit 321 is installed in the second internal mechanism 394 in FIG. 1, one embodiment of the present invention is not limited thereto. The indoor sensor unit 321 may be installed in each of a plurality of spaces in the room, and may be mounted in a mobile device such as a smart cone. These smart cones can move between multiple spaces, and built-in sensors allow users to enter information and measure user inputs for measuring one or more of temperature, radiation temperature, humidity, air quality, and illuminance at the current location. Alternatively, the desired environment information may be transmitted to the controller 400 to be described later through wireless communication.

The outdoor sensor unit 322 measures outdoor environment information. The outdoor sensor unit 322 may also measure one or more of radiation temperature, humidity, air quality, and illuminance as well as temperature. In addition, although the outdoor sensor unit 322 is installed in the second external device 392 in FIG. 1, one embodiment of the present invention is not limited thereto.

The temperature sensor 357 may measure the temperature of one side of the heat exchanger 350 that faces the first external device 391. In one embodiment of the present invention, the temperature sensor 357 may be used to determine the time of freezing of the heat exchanger (350).

The controller 400 may be mounted outside the casing 390. However, an embodiment of the present invention is not limited thereto, and the installation position of the controller 400 may be variously changed.

The controller 400 may include a first bypass damper in consideration of an indoor environment desired by the user, indoor environment information measured by the indoor sensor unit 321, an outdoor sensor unit 322, and a temperature sensor 357 and outdoor environment information. 341, the second bypass damper 342, the first ventilation damper 331, the second ventilation damper 332, the switching damper 370, the air supply fan 381, and the exhaust fan 382 are controlled. do.

Further, in one embodiment of the present invention, the control unit 400 controls the multifunctional ventilation unit 301 in the heat exchange purification ventilation mode, heat exchange clean ventilation mode, rapid purification ventilation mode, rapid clean ventilation mode, indoor circulation purification mode, and heat exchanger. The operation may be performed according to a selected mode among a plurality of modes including two or more of the thawing modes.

Hereinafter, the operation principle of the multifunctional ventilation unit 301 according to an embodiment of the present invention will be described in detail with reference to FIGS. 2 to 9.

The heat exchange purifying ventilation mode among the plurality of modes may be selected when heating or cooling is being performed indoors. In addition, the heat exchange purifying ventilation mode may be selected when heating or cooling is being performed indoors while outdoor air is more contaminated than indoor air or a relatively small amount of ventilation is desired. Here, the small amount of ventilation means a case where the amount of ventilation air is less than the heat exchange clean ventilation mode to be described later, or when the number of times of ventilation per hour is less. In one example, the number of times of ventilation in the heat exchange purifying ventilation mode may be 0.5 times or less per hour. In the heat exchange purifying ventilation mode, the indoor air flowing out to the outside and the outdoor air flowing into the indoor are exchanged with the heat exchanger 350, and the air flowing into the indoor is moved through the comprehensive filter unit 360.

As shown in FIG. 2, in the heat exchange purifying ventilation mode, the controller 400 opens the first ventilation damper 331 and the second ventilation damper 332, and the first bypass damper 341 and the second bypass damper. 342 and closes the switching damper 370. In addition, the controller 400 operates both the air supply fan 381 and the exhaust fan 382. Then, the indoor air introduced into the second internal device 394 is discharged to the outside through the first external device 391 through the heat exchanger 350, and the outdoor air introduced into the second external device 392 is heat exchanged. It is supplied to the room through the first internal mechanism (393) via the machine (350). In the heat exchanger 350, heat exchange between indoor air and outdoor air is performed. Arrows denoted by dashed lines in FIG. 2 indicate the movement direction of air.

The heat exchange purifying ventilation mode is the most common standard ventilation method, and is an energy-saving ventilation operation method that recovers more than 80% of heat energy discharged from the exhaust when it is operated during heating or cooling, and supplies it back to the room through the air supply. In addition, the outdoor heat transfer ventilation mode is selected for the purpose of improving the air quality of the room can be carried out 0.5 times the amount of ventilation ventilation per hour.

The heat exchange clean ventilation mode among the plurality of modes may also be selected when heating or cooling is being performed indoors. In addition, the heat exchange clean ventilation mode may be selected when heating or cooling is being performed indoors while outdoor air is cleaner than indoor air, or if the air is to be ventilated with a relatively large air volume. Here, the large air volume ventilation means a case where the air volume is larger than the heat exchange purifying ventilation mode described above or when the number of times of ventilation per hour is large. In the heat exchange clean ventilation mode, the indoor air flowing out to the outside and the outdoor air flowing into the indoor are exchanged by the heat exchanger 350, and the air flowing into the indoor is moved by bypassing the comprehensive filter unit 360.

As illustrated in FIG. 3, the control unit 400 opens the first ventilation damper 331, the second ventilation damper 332, and the switching damper 370 in the heat exchange purifying ventilation mode, and the first bypass damper 341 and the first bypass damper 341. The second bypass damper 342 is closed. In addition, the controller 400 operates both the air supply fan 381 and the exhaust fan 382. Then, the indoor air introduced into the second internal device 394 is discharged to the outside through the first external device 391 through the heat exchanger 350, and the outdoor air introduced into the second external device 392 is heat exchanged. It is supplied to the room through the first internal mechanism (393) via the machine (350). At this time, the air destined for the first internal mechanism 393 may bypass the comprehensive filter unit 360 and move along the filter bypass flow path 316. That is, when the switching damper 370 is opened, air is directed to the first internal mechanism 393 along the filter bypass flow path 316 without passing through the comprehensive filter unit 360 due to the air resistance of the comprehensive filter unit 360. . In the heat exchanger 350, heat exchange between indoor air and outdoor air is performed. Arrows indicated by dashed lines in FIG. 3 indicate a direction of movement of air.

This heat exchange clean ventilation mode is an effective mode of operation when the outdoor air does not need to be cleaned and purified. Since the air flowing into the room does not go through the comprehensive filter unit, air resistance is reduced, thereby reducing the load and noise of the air supply fan, and allowing a larger air volume to be ventilated than the heat exchange purifying ventilation mode.

Among the plurality of modes, the rapid clean ventilation mode may be selected when the indoor air temperature is higher than the outdoor air temperature and higher than the user's desired temperature. That is, the rapid clean ventilation mode is an effective ventilation operation method when heat exchange between indoor air and outdoor air is not necessary. In addition, the rapid clean ventilation mode may be mainly selected during the season, such as spring and autumn, it is useful when the user desired temperature is relatively closer to the outdoor temperature than the current indoor temperature. In this case, the change season in which the rapid clean ventilation mode is selected may be defined as a case where the temperature of the outdoor air is 15 degrees Celsius or more and 25 degrees Celsius or less, and the indoor temperature is higher than the outdoor temperature. The above-described temperature range may be set variously according to the user's selection.

In addition, the rapid clean ventilation mode may be selected when the outdoor air is cleaner than the indoor air at the same time as the transition season, or may be selected when the air is to be ventilated with a relatively large air volume. In addition, the rapid clean ventilation mode may be selected when the indoor air is greatly contaminated and emergency ventilation is required. Rapid clean ventilation mode is capable of ventilation with the largest amount of air flow among the plurality of modes. In one example, the number of times of ventilation in the rapid clean ventilation mode may be 6 or more times per hour. In the rapid clean ventilation mode, the heat exchanger 350 bypasses the indoor air to the outside and the outdoor air flows into the indoor air, and the air introduced into the indoor air bypasses the comprehensive filter unit 360 to bypass the filter bypass flow path 316. Move along.

As shown in FIG. 4, in the rapid clean ventilation mode, the controller 400 may include a first ventilation damper 331, a second ventilation damper 332, a first bypass damper 341, and a second bypass damper 342. ) And all of the switching dampers 370 are opened. The controller 400 operates both the air supply fan 381 and the exhaust fan 383. Then, the indoor air introduced into the second internal mechanism 394 bypasses the heat exchanger 350, passes through the second bypass flow path 312, and is discharged to the outside through the second external mechanism 392. The outdoor air introduced into the external device 391 bypasses the heat exchanger 350, passes through the first bypass flow path 311, and is supplied to the room through the first internal device 393. At this time, when the first bypass damper 341 and the second bypass damper 342 are opened, the air does not pass through the heat exchanger 350 but the first bypass flow path 311 due to the air resistance of the heat exchanger 350. ) And the second bypass flow path 312. That is, no heat exchange occurs between indoor air and outdoor air. The air supplied to the room through the first internal mechanism 393 moves by bypassing the comprehensive filter unit 360. Arrows indicated by dotted lines in FIG. 4 indicate a direction of movement of air.

In such a rapid clean ventilation mode, since air moves by bypassing both the heat exchanger 350 and the comprehensive filter unit 360, the ventilation air volume is relatively high among the plurality of modes. That is, in the rapid clean ventilation mode, since the air moves without passing through the heat exchanger 350 and the comprehensive filter unit 360, the static pressure inside the multifunctional ventilation unit 301 is relatively very low. As such, since the air resistance passing through the multifunctional ventilation unit 301 can be greatly reduced, the load of the air supply fan 381 and the exhaust fan 382 can be reduced, and the overall energy can be saved as well as the noise can be reduced. have. For example, rapid ventilation of 6 or more large airflows per hour is possible.

Among the plurality of modes, the rapid purification ventilation mode may also be selected when the indoor air temperature is higher than the outdoor air temperature and higher than the user's desired temperature. That is, the rapid purifying ventilation mode may be mainly selected in seasons such as spring and autumn as an effective ventilation operation method when heat exchange between indoor air and outdoor air is not required. In this case, the change season in which the rapid purification ventilation mode is selected may also be defined as a case where the temperature of the outdoor air is 15 degrees Celsius or more and 25 degrees Celsius or less, and the room temperature is higher than the outdoor temperature. The above-described temperature range may be set variously according to the user's selection.

In addition, the rapid purification ventilation mode may be selected when the outdoor season is at the same time the outdoor air is more polluted than the indoor air, or if you want to ventilate with a relatively small amount of wind. Here, the small amount of ventilation means that the amount of ventilation air is smaller than the rapid clean ventilation mode or the number of times of ventilation per hour is less. In addition, the case where the outdoor air is contaminated may be a case of heavy dust or fine dust. In the rapid purification ventilation mode, the heat exchanger 350 bypasses the indoor air to the outside, the outdoor air is introduced into the indoor, and the air introduced into the indoor is moved through the comprehensive filter unit 360.

As illustrated in FIG. 5, in the rapid clean ventilation mode, the controller 400 may include a first ventilation damper 331, a second ventilation damper 332, a first bypass damper 341, and a second bypass damper 342. ) And close the switching damper (370). The controller 400 operates both the air supply fan 381 and the exhaust fan 383. Then, the indoor air introduced into the second internal mechanism 394 bypasses the heat exchanger 350, passes through the second bypass flow path 312, and is discharged to the outside through the second external mechanism 392. The outdoor air introduced into the external device 391 bypasses the heat exchanger 350, passes through the first bypass flow path 311, and is supplied to the room through the first internal device 393. In addition, the air supplied to the room through the first internal mechanism 393 moves through the comprehensive filter unit 360. That is, contaminated indoor air may be supplied to the room after being purified while passing through the comprehensive filter unit 360. Arrows indicated by dashed lines in FIG. 5 indicate the direction of movement of air.

In this rapid purification ventilation mode, the air bypasses the heat exchanger 350 to allow the indoor air to flow out to the outside and the outdoor air to flow into the room, but the air flowing into the room moves through the comprehensive filter unit 360, so the rapid clean ventilation mode. Compared with the low ventilation air volume.

Among the plurality of modes, the indoor circulation purification mode is selected when the indoor air is to be purified. In the indoor circulation purification mode, outdoor air is not introduced into the room. In the indoor circulation purification mode, the indoor air is moved back to the room through the heat exchanger 350 and the comprehensive filter unit 360. In some cases, the indoor circulation purification mode may also serve to prevent freezing of the winter heat exchanger 350.

As shown in FIG. 6, in the indoor circulation purification mode, the controller 400 closes the first ventilation damper 331, the second ventilation damper 332, and the switching damper 370, and the first bypass damper 341 and Open the second bypass damper 342. The controller 400 may operate both the air supply fan 381 and the exhaust fan 383, or may operate only one of the air supply fan 381 and the exhaust fan 383. Then, the indoor air introduced into the second internal mechanism 394 freely moves through the heat exchanger 350, the first bypass flow path 311, and the second bypass flow path 312 to pass through the comprehensive filter unit 360. After the first internal mechanism (393) is supplied back to the room. Therefore, the indoor air can be purified. Arrows indicated by dashed lines in FIG. 6 indicate a direction of movement of air.

As such, according to an embodiment of the present invention, the indoor air quality may be improved even when the multifunctional ventilation unit 301 is not only provided with ventilation but also without the need for providing a separate device such as an air purifier.

Among the plurality of modes, the heat exchanger thawing mode includes a temperature of one side of the heat exchanger 350 facing the first external device 391, that is, the temperature of the first side surface 351 during the heat exchange purge ventilation mode or the heat exchange purge ventilation mode. It is selected when the temperature falls below the preset reference temperature.

When operating in the heat exchange purifying ventilation mode or the heat exchange purifying ventilation mode when the outdoor temperature is very low, condensation may occur from the first side 351 of the heat exchanger 350. In particular, when ventilation is performed at a temperature below zero where the outdoor air temperature is very low, dew condensation is generated in the heat exchanger 350 due to a difference in temperature between the outdoor air and the indoor air, and condensation occurs due to the low temperature of the outdoor air. It begins to freeze from the site. When the dew condensation freezes, the airflow passage inside the heat exchanger 350 is blocked, and the exhaust air flow rate is drastically reduced. Accordingly, as the heat exchange efficiency rapidly decreases, very cold air is introduced into the room.

Multifunctional ventilation unit 301 according to an embodiment of the present invention, as described above, the temperature of the first side 351 of the heat exchanger 350 in order to prevent the freezing in the situation where condensation and freezing occurs based on When the temperature is lower than the heat exchange purifying ventilation mode or the heat exchange purifying ventilation mode, the operation is switched to the heat exchanger thawing mode. In this case, the preset reference temperature may vary depending on various variables such as the installation location, size, and performance of the multifunctional ventilation unit 301, and may be determined through a test in consideration of these variables. In addition, the temperature of the first side surface 350 of the heat exchanger 350 may be measured through the temperature sensor 357. In addition, when the thawing is completed by operating in the heat exchanger thawing mode, it is repeatedly switched to the heat exchange purifying ventilation mode or the heat exchange purifying ventilation mode to perform the division operation.

In addition, in one embodiment of the present invention, the heat exchanger thawing mode may be performed in various ways. 7, 8 and 9 exemplarily illustrate various heat exchanger thawing modes.

Hereinafter, the method shown in FIG. 7 is called a first heat exchanger thawing mode, the method shown in FIG. 8 is called a second heat exchanger thawing mode, and the method shown in FIG. 9 is called a third heat exchanger thawing mode.

As shown in FIG. 7, in the first heat exchanger thawing mode, the controller 400 opens only the first ventilation damper 331, and the second ventilation damper 332, the first bypass damper 341, and the second bypass. The damper 342 and the switching damper 370 are closed. In addition, the controller 400 stops the operation of the air supply fan 381 and operates only the exhaust fan 382. Then, the indoor air introduced into the second internal mechanism 394 is discharged to the outside through the first external device 391 through the heat exchanger 350, so that relatively warm air in the room freezes the heat exchanger 350. Will melt. Arrows indicated by dotted lines in FIG. 7 indicate a direction of movement of air.

Since the first heat exchanger thawing mode discharges indoor air to the outside but the outdoor air is not supplied to the indoor, negative pressure may be generated in the room as the operating time of the first heat exchanger thawing mode increases.

As shown in FIG. 8, in the second heat exchanger thawing mode, the controller 400 closes the first ventilation damper 331 and the second ventilation damper 332, and the first bypass damper 341 and the second bypass. The damper 342 and the switching damper 370 are opened. The controller 400 may operate both the air supply fan 381 and the exhaust fan 383, or may operate only one of the air supply fan 381 and the exhaust fan 383. Then, the indoor air introduced into the second internal mechanism 394 melts the freezing of the heat exchanger 350 and is supplied to the room again. Arrows indicated by dashed lines in FIG. 8 indicate a direction of movement of air.

The second heat exchanger thawing mode may quickly melt the freezing of the heat exchanger 350, but condensation may occur in the heat exchanger 350 when operating in the heat exchange purification ventilation mode or the heat exchange clean ventilation mode in the process of melting the freezing of the heat exchanger 350. There is also a possibility that new condensation will occur on the side opposite to the surface where. In addition, when operating in the second heat exchanger thaw mode, cold air may be introduced into the room.

As shown in FIG. 9, in the third heat exchanger thawing mode, the controller 400 closes the first ventilation damper 331, the second ventilation damper 332, and the second bypass damper 342 and the first bypass. The damper 341 and the switching damper 370 are opened. The controller 400 may operate both the air supply fan 381 and the exhaust fan 383, or may operate only one of the air supply fan 381 and the exhaust fan 383. Then, the indoor air introduced into the second internal mechanism 394 melts the freezing of the heat exchanger 350 and is supplied to the room again. Arrows indicated by dotted lines in FIG. 9 indicate a direction of movement of air. The third heat exchanger thawing mode may also introduce cold air into the room.

As described above, the first heat exchanger thawing mode, the second heat exchanger thawing mode, and the third heat exchanger thawing mode are different from each other in terms of advantages and disadvantages, and thus are appropriate according to the outdoor temperature and the current situation and degree of freezing of the multifunctional ventilation unit 301. The heat exchanger thawing mode can be selected.

As such, according to an embodiment of the present invention, since it is not necessary to heat the outside air using a separate electric heater to prevent condensation and freezing of the heat exchanger 350, the overall operation of the multifunctional ventilation unit 301 is performed. The energy consumed can be greatly reduced.

In addition, by not installing the electric heater inside the multi-function ventilation unit 301, not only the initial installation cost can be reduced, but also the risk of fire caused by the electric heater is eliminated.

In addition, as shown in FIG. 10, a drain plate 358 and a drain pipe 359 for draining condensation generated in the heat exchanger 350 when operating in the heat exchanger thawing mode may be installed below the heat exchanger 350. Can be. The remaining moisture drained through the drain pipe 359 may be dried by indoor air passing through the heat exchanger 350 during the thawing operation.

In addition, the controller 400 may determine the switching time of the thawing operation based on the temperature of the outdoor air introduced into the heat exchanger 350 or the resistance performance of the air passing through the heat exchanger. 11 is a graph showing the switching time of the heat exchange purifying ventilation mode or the heat exchange purifying ventilation mode and the heat exchanger thawing mode. As shown in FIG. 11, when the condensation is generated and the condensation starts to freeze when operating in the heat exchange purifying ventilation mode or the heat exchange purifying ventilation mode, the heat exchanger thawing mode is switched, and when all the freezing and condensation are removed, the heat exchange purifying ventilation mode is again performed. Or switch to heat exchange clean ventilation mode.

By such a configuration, the multifunctional ventilation unit 301 according to the embodiment of the present invention can suppress the freezing of the heat exchanger 350 and improve the overall energy efficiency. That is, by analyzing the outdoor environment and the indoor environment to perform the ventilation in a variety of patterns according to the environmental change can greatly improve the ventilation efficiency, it can also minimize the energy consumed during ventilation.

In addition, the multifunctional ventilation unit 301 according to an embodiment of the present invention may not only improve indoor air quality by purifying indoor air but also purify external contaminants such as fine dust during ventilation and supply air to the room.

In addition, according to an embodiment of the present invention, since a separate device for purifying the indoor air can be omitted, it is possible to improve the space use efficiency inside the building, and to reduce the installation cost and operating cost for controlling the indoor environment. have.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains can understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features. will be.

Therefore, the embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is represented by the following detailed description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

301: multifunctional ventilation unit
311: first bypass flow path
312: second bypass flow path
316: filter bypass flow path
321: indoor sensor unit
322: outdoor sensor unit
331: first ventilation damper
332: second ventilation damper
341: first bypass damper
342: second bypass damper
350: heat exchanger
351: first side
352: second side
353: third aspect
354: fourth aspect
357: temperature sensor
358: drain plate
359: drain pipe
360: comprehensive filter unit
365, 366: pre-filter
370: switching damper
381: supply fan
382: exhaust fan
390: casing
391: first external instrument
392: second external instrument
393: first internal mechanism
394: second internal mechanism
395: partition
400: control unit

Claims (19)

A casing having a first outer mechanism and a second outer mechanism connected to the outdoors, and a first internal mechanism and a second internal mechanism connected to the interior;
A heat exchanger disposed in the casing to exchange heat between outdoor air to be introduced into the room and indoor air to be discharged to the outside;
A first bypass flow passage provided between the heat exchanger and one inner wall of the casing and bypassing the heat exchanger to connect the first outer and first internal mechanisms;
A second bypass flow path provided between the heat exchanger and the other inner wall of the casing and bypassing the heat exchanger to connect the second external device and the second internal device;
A first bypass damper for opening and closing the first bypass flow path;
A second bypass damper for opening and closing the second bypass flow path;
A first ventilation damper that opens and closes the first external device;
A second ventilation damper that opens and closes the second external device;
A comprehensive filter unit provided in one region between the first bypass flow path and the heat exchanger and the first internal mechanism;
A filter bypass flow passage bypassing the comprehensive filter part and connected to the first internal mechanism;
A switching damper for opening and closing the filter bypass flow path;
An indoor sensor unit measuring indoor environment information;
An outdoor sensor unit measuring outdoor environment information; And
The first bypass damper, the second bypass damper, the first ventilation damper, and the user's desired indoor environment in consideration of indoor environment information and outdoor environment information measured by the indoor sensor unit and the outdoor sensor unit. Control unit for controlling the operation of the second ventilation damper and the switching damper
Including;
The control unit may be configured according to a mode selected from a plurality of modes including a heat exchange purification ventilation mode, a heat exchange clean ventilation mode, a rapid purification ventilation mode, a rapid clean ventilation mode, an indoor circulation purification mode, and a heat exchanger thawing mode. Respectively controlling the operation of a pass damper, the second bypass damper, the first ventilation damper, the second ventilation damper, and the switching damper,
The heat exchange purifying ventilation mode is selected when the air is polluted more than the indoor air or when the air is to be ventilated with a relatively small amount of air when the heating or cooling is being performed in the room. Heat exchanged in the heat exchanger and the air flowing into the room is moved through the integrated filter unit,
The heat exchange clean ventilation mode is selected when the outdoor air is clean or relatively large air volume than the indoor air when the heating or cooling is being performed in the room to remind the indoor air and the outdoor air flowing into the indoor air. Heat exchanged in the heat exchanger and the air flowing into the room is moved by bypassing the comprehensive filter unit,
The rapid clean ventilation mode is selected when the indoor air temperature is higher than the outdoor air temperature and higher than the user's desired temperature, and the outdoor air is cleaner than the indoor air or ventilated with a relatively large air volume, or the indoor air is greatly contaminated and urgent ventilation is required. Bypassing the heat exchanger and the comprehensive filter unit to move indoor air and outdoor air,
The rapid purifying ventilation mode is selected when the indoor air temperature is higher than the outdoor air temperature and higher than the user's desired temperature, but the outdoor air is contaminated than the indoor air or if the air is to be ventilated with relatively small amount of air. Flows to the outside and the outdoor air flows into the room, but the air flowing into the room is moved through the comprehensive filter unit,
The indoor circulation purification mode is selected to purify the indoor air to move the indoor air back to the room through the heat exchanger and the comprehensive filter unit,
The heat exchanger thawing mode is selected when the temperature of one side of the heat exchanger facing the first external device becomes less than a predetermined reference temperature during operation in the heat exchange purifying ventilation mode or the heat exchange purifying ventilation mode,
A drain plate and a drain pipe for draining condensation generated in the heat exchanger in the heat exchanger thawing mode are connected to the lower part of the heat exchanger, and the remaining water drained through the drain plate and the drain pipe is transferred to the heat exchanger in the heat exchanger thawing mode. Multifunctional ventilation unit, characterized in that the drying by indoor air passing through the device. The method of claim 1,
An air supply fan disposed relatively to the first internal mechanism;
An exhaust fan disposed relatively adjacent to the second internal mechanism
Multifunctional ventilation unit further comprises. delete delete delete The method of claim 1,
In the heat exchange purifying ventilation mode, the control unit opens the first ventilation damper and the second ventilation damper and closes the first bypass damper, the second bypass damper and the switching damper. The method of claim 1,
And the control unit opens the first ventilation damper, the second ventilation damper, and the switching damper and closes the first bypass damper and the second bypass damper in the heat exchange clean ventilation mode. delete The method of claim 1,
In the rapid clean ventilation mode, the control unit opens the first ventilation damper, the second ventilation damper, the first bypass damper, the second bypass damper and the switching damper. delete The method of claim 1,
And the control unit opens the first ventilation damper, the second ventilation damper, the first bypass damper, and the second bypass damper in the rapid purification ventilation mode, and closes the switching damper. delete The method of claim 1,
In the indoor circulation purification mode, the control unit closes the first ventilation damper, the second ventilation damper and the switching damper, and opens the first bypass damper and the second bypass damper. delete The method of claim 1,
And a temperature sensor for measuring a temperature of one side of the heat exchanger facing the first external device. The method of claim 1,
In the heat exchanger thawing mode, the control unit opens the first ventilation damper and closes the second ventilation damper, the first bypass damper, the second bypass damper, and the switching damper. The method of claim 1,
In the heat exchanger thawing mode, the control unit closes the first ventilation damper and the second ventilation damper, and the first bypass damper, the second bypass damper, and the switching damper are opened. The method of claim 1,
In the heat exchanger thawing mode, the control unit closes the first ventilation damper, the second ventilation damper and the second bypass damper, and opens the first bypass damper and the switching damper.
delete

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