KR20110102729A - Hybride ventilation system for saving energy and method thereof - Google Patents

Abstract

According to an aspect of the present invention, when the door of the window chassis of the natural ventilation window by the temperature measuring unit for measuring the temperature of the indoor and outdoor, the window opening and closing detection unit for detecting whether the window chassis of the natural ventilation window is opened and closed, the window opening and closing detection unit When the indoor and outdoor temperature is different by more than a predetermined temperature by the temperature measuring unit, the waste heat recovery exchange unit and the window opening / closing detection unit to close the heat exchange through the heat exchange through the waste heat recovery and close the door of the window chassis of the natural ventilation window In the case, the indoor and outdoor ventilation unit, the waste heat recovery exchange unit and the natural ventilation unit provided on one side of the window chassis of the natural ventilation window in order to enable natural ventilation when the indoor and outdoor temperature is less than a predetermined temperature by the temperature measuring unit. Energy comprising a power supply for supplying power, and a control unit for controlling them Hybrid ventilation systems are provided for savings.

Description

Hybrid ventilation system for saving energy and method thereof

The present invention relates to a hybrid ventilation system that can save energy, and more particularly, a hybrid ventilation system for energy saving that can prevent energy loss due to continuous operation of the waste heat ventilation system through interlocking with a natural ventilation system. And a method thereof.

In general, air in an enclosed space increases carbon dioxide and the like due to respiratory activity and contaminates indoor air. Accordingly, in the case of office or residential apartments, there is a need to periodically exchange indoor air with fresh air outside.

Ventilation method is largely natural ventilation and air conditioning ventilation using artificial ventilation. Natural ventilation is the most commonly used ventilation method that allows users to open the windows directly to introduce fresh air from outside, and the air-conditioning ventilation method uses the exhaust energy emitted to the outside in the process of exchanging indoor air to external air. For example, by passing cooling energy or heating energy through a heat exchanger provided in the ventilation device, energy discharged to the outside is accumulated in the heat exchanger and recycled in the process of introducing outdoor air.

By the way, conventional ventilation is a ventilation method that has been used for thousands of years, but there is a limit in providing convenience of use because it can be ventilated only when a user directly opens a window.

The Korean Patent No. 623526 discloses driving a damper in a waste heat recovery heat exchanger device by detecting a temperature difference between the outside and the room as a ventilation method for solving such problems and at the same time saving energy discharged to the outside during ventilation.

However, according to the conventional ventilation method, the channel passing through the heat exchanger is provided with two outdoor air inlets and two indoor air inlets in one heat exchanger body to form two different flow paths by dampers in the state of mediating the heat exchanger. It is supposed to. Therefore, although the temperature difference between the indoor and outdoor air is detected, if necessary, the damper provided in the heat exchanger is driven to allow indoor and outdoor ventilation through the heat exchanger main body, but the complicated structure of the heat exchanger must be used for the ventilation of indoor air even at a temperature that does not require heat exchange. Since the passage is made of a ventilation flow is not efficient. That is, since the path in the heat exchanger in which the flow path is formed has a long and bent duct line so that the path is formed through the heat exchanger, the natural ventilation is not substantially performed in the main body having the heat exchanger unless the artificial fan is driven. There is a problem. Therefore, a conventional ventilator using a heat exchanger that detects and ventilates a temperature difference between indoor and outdoor temperature must drive a fan in a main body provided with a heat exchanger even when the indoor and outdoor temperature difference is not large, thereby causing noise and energy consumption.

Therefore, even if the indoor and outdoor temperature difference is not large, the development of a ventilation system that does not require the driving of the fan for ventilation is required.

Meanwhile, in order to save energy, it is necessary to develop a ventilation system that can provide a user's convenience in using both natural ventilation and heat exchange ventilation.

Accordingly, an object of the present invention is to provide a hybrid ventilation system for energy saving that can not use a drive fan for a separate ventilation when the indoor and outdoor temperature difference is less than a predetermined temperature when using the heat exchange system to detect the indoor and outdoor temperature difference.

In addition, another object of the present invention is to provide a hybrid ventilation system for energy saving capable of combining natural ventilation and heat exchange ventilation.

According to an aspect of the present invention, when the door of the window chassis of the natural ventilation window by the temperature measuring unit for measuring the temperature of the indoor and outdoor, the window opening and closing detection unit for detecting whether the window chassis of the natural ventilation window is opened and closed, the window opening and closing detection unit When the indoor and outdoor temperature is different by more than a predetermined temperature by the temperature measuring unit, the waste heat recovery exchange unit and the window opening / closing detection unit to close the heat exchange through the heat exchange through the waste heat recovery and close the door of the window chassis of the natural ventilation window In the case, the indoor and outdoor ventilation unit, the waste heat recovery exchange unit and the natural ventilation unit provided on one side of the window chassis of the natural ventilation window in order to enable natural ventilation when the indoor and outdoor temperature is less than a predetermined temperature by the temperature measuring unit. Energy comprising a power supply for supplying power, and a control unit for controlling them Hybrid ventilation systems are provided for savings.

Here, the temperature measuring unit is composed of two temperature measuring instruments, each one is preferably provided outside the room.

In addition, the window opening and closing detection unit is provided with a magnetic ventilation sensor and a magnetic ventilation sensor in the natural ventilation window and the window chassis, respectively, to detect whether the door of the window chassis is opened by detecting the change in the magnetic field according to the separation between the door of the window chassis It is desirable to confirm that it is open.

In addition, the window opening and closing detection unit is preferably made of an infrared sensor, a proximity switch or a contact switch.

In addition, the waste heat recovery exchange unit is a housing having an outdoor air supply and an indoor air supply and discharge mechanism at both ends, partitioned in the housing by a partition wall, an exhaust duct for indoor air exhaust and an air supply duct for outdoor air supply, the body of the housing Heat exchanger for transmitting energy to outdoor air against cooling and heating energy of indoor air inside the center, exhaust fan coupled to exhaust motor for exhausting indoor air located on one side of exhaust duct, located on one side of air supply duct An air supply fan coupled to an air supply motor for supplying air, a first damper positioned at one side of the exhaust duct to open and close the flow path of the exhaust duct, and a second damper positioned at one side of the air supply duct to open and close the air supply duct flow path It is preferable that it consists of a damper.

The first damper and the second damper may be controlled by the control unit when the indoor / outdoor temperature difference differs by a predetermined value or more by a temperature measuring unit when a signal indicating that the natural ventilation window is closed by the window opening / closing detection unit is detected. When operating the waste heat recovery exchange unit, it is controlled to open, and in order to smooth the flow of indoor and outdoor air passing through the heat exchanger, it is preferable that the exhaust fan and the air supply fan are driven by the controller.

In addition, when a signal indicating that the natural ventilation window is closed by the window opening / closing detection unit is detected, when the indoor / outdoor temperature difference is less than a certain value by the temperature measuring unit, the operation of the waste heat recovery exchange unit is stopped by the control unit. The first damper and the second damper are controlled to close the natural ventilation unit, and the exhaust fan and the air supply fan are preferably stopped by the controller.

Further, when a signal indicating that the natural ventilation window is opened by the window opening and closing detection unit is detected, the operation of the waste heat recovery exchange unit is stopped by the control unit regardless of whether the indoor / outdoor temperature difference differs by a predetermined value or more. The first damper and the second damper are controlled to be closed by the controller, and the exhaust fan and the air supply fan are preferably stopped by the controller.

In addition, the natural ventilation unit is formed integrally with the window chassis on one side of the window chassis, the frame having an opening for natural ventilation, the cover corresponding to the opening and hinged to the frame to guide or stop the natural ventilation, and the cover It is preferably made of a motor that couples the end of the cover and the frame in order to open and close electrically.

In addition, when a signal indicating that the window is closed by the window opening / closing detection unit is detected, if the indoor / outdoor temperature is less than a predetermined value by the temperature measuring unit, the controller operates the motor of the natural ventilation unit to open the cover. It is preferable to allow natural ventilation through convection without artificial blowing through the opening of the natural ventilation unit.

In addition, when a signal indicating the closed state of the window is detected by the window opening / closing detection unit, the control unit operates the motor of the natural ventilation unit to close the cover when the indoor and outdoor temperature difference differs by a predetermined value or more. As a result, it is preferable to stop the natural ventilation operation by the natural ventilation unit and to allow artificial ventilation through heat exchange by the waste heat recovery exchange unit.

According to another aspect of the present invention, the step of checking whether the window is opened by the user by the window opening and closing detection unit, if the signal indicating that the window is opened by the window opening and closing detection unit stops the operation of the waste heat recovery exchange unit Stopping the driving of the exhaust fan and the supply fan so that the first damper and the second damper are closed; if the window is closed, detecting the indoor / outdoor temperature difference by the temperature measuring unit; When the cover is closed by a motor to stop the natural ventilation operation by the natural ventilation unit, the first damper and the second damper is opened to operate the waste heat recovery exchange, and the heat exchange of the indoor and outdoor air in the heat exchanger Exhaust fan and air supply fan are driven to achieve heat exchange of indoor and outdoor air and artificial ventilation at the same time. Stopping the driving of the waste heat recovery exchanger for a predetermined time when the ventilation driving time of the waste heat recovery exchanger has passed the set value, and if the indoor / outdoor temperature difference is less than the predetermined value by the temperature measuring unit. Opening the cover, wherein the first damper and the second damper is closed so that the operation of the waste heat recovery exchange unit is stopped, and the operation of the exhaust fan and the supply fan is stopped to prevent artificial ventilation by the waste heat recovery exchange unit. And, and after the natural ventilation time by the natural ventilation unit is provided a ventilation method of the hybrid ventilation system for energy saving comprising the step of stopping the operation of the natural ventilation when the set value has elapsed.

According to the present invention, when the user closes the window and the natural ventilation is made by the control unit, unlike the prior art, the flow path of indoor and outdoor air is not restricted by obstacles in the opening located in the frame corresponding to the width corresponding to the thickness of the window chassis. Ventilation saves energy by eliminating the need for a blower for ventilation.

1 is a schematic diagram showing a hybrid ventilation system for energy saving according to a preferred embodiment of the present invention.
2 is a block diagram showing a hybrid ventilation system for energy saving according to a preferred embodiment of the present invention.
3 is a cross-sectional view showing a waste heat recovery exchange in a hybrid ventilation system for energy saving according to a preferred embodiment of the present invention.
Figure 4 is a perspective view showing the configuration of the natural ventilation in the hybrid ventilation system for energy saving according to a preferred embodiment of the present invention.
5 is a partial cross-sectional view showing the operation of the natural ventilation unit in a hybrid ventilation system for energy saving according to a preferred embodiment of the present invention.
6 is a flow chart of the operation of the hybrid ventilation system for energy saving according to a preferred embodiment of the present invention.

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

1 is a schematic diagram showing a hybrid ventilation system for energy saving according to a preferred embodiment of the present invention, Figure 2 is a block diagram showing a hybrid ventilation system for energy saving according to a preferred embodiment of the present invention.

As shown in Figure 1 and 2, the hybrid ventilation system for energy saving according to a preferred embodiment of the present invention 100 of the temperature measuring unit 10, the natural ventilation window 80 for measuring the temperature of the indoor and outdoor The temperature measuring unit 10 when the door of the window chassis 82 of the natural ventilation window 80 is closed by the window opening / closing detection unit 20 and the window opening / closing detection unit 20 for detecting whether the window chassis 82 is opened or closed. When the indoor and outdoor temperature is different by more than a predetermined temperature by the waste heat recovery exchange unit 30, the window opening and closing detection unit 20 for the ventilation at the same time as the heat exchange through the heat recovery through the waste heat recovery of the natural ventilation window (80) In the case where the door of the window chassis 80 is closed, the window chassis 82 of the natural ventilation window 80 in order to enable natural ventilation when the indoor and outdoor temperature is less than a predetermined temperature by the temperature measuring unit 10. Equipped at the top of Natural ventilation unit 40, power supply unit 50 for supplying power to the waste heat recovery exchange unit 30 and the natural ventilation unit 40, and temperature measuring unit 10, window opening and closing detection unit 20, waste heat recovery And a control unit 60 for controlling the exchange unit 30 and the natural ventilation unit 40.

Here, the temperature measuring unit 10 consists of two temperature measuring instruments, each provided with one indoor and outdoor.

The window opening and closing detection unit 20 is for detecting whether the door of the window chassis 82 of the natural ventilation window 80 is opened. The window chassis 82 is installed at the natural ventilation window 80 to correspond to the magnetic position. The magnetic sensor is installed in) to detect the change in the magnetic field according to the separation between them to check whether the door of the window chassis 82 is open.

On the other hand, the window opening and closing detection unit 20 may be made of another element, such as an infrared sensor, a proximity switch or a contact switch.

The waste heat recovery exchange unit 30, as shown in Figure 3, the main body is installed perpendicular to the wall 70 that forms the boundary of the indoor and outdoor, the outdoor air supply and exhaust air supply (31a) and the indoor air supply and exhaust air supply (31b) at both ends. The main body of the housing 31 and the main body of the housing 31 which are partitioned by the partition wall 32 in the housing 31 are provided with an exhaust duct 33a for exhausting indoor air, an air supply duct 33b for supplying outdoor air, and a housing 31. An exhaust fan 37a coupled to an exhaust motor 36a for exhausting indoor air located on one side of a heat exchanger 35 and an exhaust duct 33a for transmitting energy to outdoor air with respect to cooling and heating energy of indoor air therein. ), The air supply fan 37b coupled to the air supply motor 36b for supplying outdoor air at one side of the air supply duct 33b, and the air duct of the exhaust duct 33a at one side of the exhaust duct 33a. A flow path of the air supply duct 33b located at one side of the first damper 39a and the air supply duct 33b for opening and closing. It consists of a second damper (39b) for opening and closing the.

Here, the first damper (39a) and the second damper (39b) by the temperature measuring unit 10 when the signal indicating that the natural ventilation window 80 is closed by the window opening and closing detection unit 20 is detected. When the indoor and outdoor temperature difference differs by a predetermined value or more, the controller 60 is controlled to open when the waste heat recovery exchange unit 30 is operated. At this time, in order to smoothly flow the indoor and outdoor air passing through the heat exchanger 35, the exhaust fan 37a and the air supply fan 37b are driven by the controller 60.

On the other hand, in the case where a signal indicating that the natural ventilation window 80 is closed by the window opening and closing detection unit 20 is detected by the temperature measuring unit 10 when the indoor and outdoor temperature difference is less than a certain value control unit 60 The first damper 39a and the second damper 39b are controlled to be closed so that the operation of the waste heat recovery exchanger 30 is stopped and the natural ventilation unit 40 is operated. At this time, driving of the exhaust fan 37a and the air supply fan 37b is similarly stopped by the controller 60.

On the other hand, when a signal indicating that the natural ventilation window 80 is opened by the window opening and closing detection unit 20 is detected by the temperature measuring unit 10 regardless of whether the indoor and outdoor temperature difference is more than a predetermined value difference control unit 60 The first damper 39a and the second damper 39b are controlled to be closed by the control unit 60 so that the operation of the waste heat recovery exchange unit 30 is stopped. At this time, driving of the exhaust fan 37a and the air supply fan 37b is similarly stopped by the controller 60. In this case, the ventilation is not performed by the waste heat recovery exchange unit 30 and the natural ventilation unit 40, but natural ventilation is performed by the user arbitrarily opening the natural ventilation window 80.

1 and 4, the natural ventilation portion 40 is formed integrally with the window chassis 82 on one side, preferably the upper end of the window chassis 82, the opening 41 for natural ventilation The frame 43, which corresponds to the opening 41 and is hinged to the frame 42, the cover 43 for inducing or stopping natural ventilation, and the cover 43 to open and close the cover 43 by electric It consists of a motor 44 coupling the end of the frame 42 with. Reference numeral 84 denotes a window of the window chassis 82 provided with the natural ventilation unit 40.

When a signal indicating that the window is closed by the window opening / closing detection unit 20 is detected, when the indoor / outdoor temperature is less than a predetermined value by the temperature measuring unit 10, the control unit 60 is a natural ventilation unit 40. By operating the motor 44 of the cover 43 is to open the natural ventilation by convection without artificial ventilation through the opening 41 of the natural ventilation unit 40.

On the other hand, when a signal indicating that the window is closed by the window opening and closing detection unit 20 is detected by the temperature measuring unit 10 when the indoor and outdoor temperature difference is more than a predetermined value difference, the control unit 60 is a natural ventilation unit By operating the motor 44 of the 40 to close the cover 43, the natural ventilation operation by the natural ventilation unit 40 is stopped and at the same time artificial ventilation through heat exchange by the waste heat recovery exchange unit 30 To be done.

As described above, according to the hybrid ventilation system for energy saving according to the preferred embodiment of the present invention, when natural ventilation is required in an environment in which indoor and outdoor temperature differences are not large, natural ventilation is provided on one side of the window chassis unlike natural ventilation through a conventional waste heat recovery exchanger. Smooth natural ventilation can be achieved through the electric opening and closing of the cover 43 of the ventilation unit 40.

That is, in the case of natural ventilation through the conventional waste heat recovery exchanger, the damper, the driving motor for the operation of the damper, and the heat exchanger are provided inside so that the natural ventilation is made through the long duct passage, which has many obstacles to prevent natural convection. There was no natural ventilation.

However, according to the hybrid ventilation system for energy saving according to a preferred embodiment of the present invention, when natural ventilation is necessary, the opening 41 for natural ventilation provided on one side of the window without the user directly opening the window, for opening and closing the same The natural ventilation is achieved by the natural ventilation unit 40 formed of the cover 43 and the motor 44 for driving the cover 43. In this case, the opening 41 directly opens the space between the indoor side and the outdoor side. By being made by the frame 42 formed within the thickness range of the window frame to have a short convection path and at the same time there is no convection obstacle inside the natural ventilation through efficient convection can be achieved.

That is, as shown in Figure 5, when the natural ventilation is made by the controller in a state where the user closes the window is located in the frame 42 corresponding to the width corresponding to the thickness of the window chassis 82 between the outdoor and indoor Since the opening 41 is naturally ventilated in the state in which the cover 43 is directly opened without being restricted by obstacles, it is possible to save energy by not requiring a blower device for ventilation. On the other hand, while the natural ventilation unit 40 has been described in the window chassis 82, it may be provided through the outer wall instead. At this time, it is preferable to provide an electric damper for opening and blocking the flow path of natural ventilation.

6 is a flow chart of the operation of the hybrid ventilation system for energy saving according to a preferred embodiment of the present invention.

As shown in Figure 6, the operation of the hybrid ventilation system for energy saving according to a preferred embodiment of the present invention is as follows.

First, check whether the window is opened by the user by the window opening and closing detection unit 20 (step S1).

If the window is opened, the driving of the exhaust fan 37a and the air supply fan 37b is stopped to stop the operation of the waste heat recovery exchanger 30, and the first damper 39a and the second damper 39b are closed. (Step S2).

On the other hand, when the window is closed by the temperature measuring unit 10 detects the indoor and outdoor temperature difference (step S3).

If the indoor and outdoor temperature difference is more than a predetermined value, the cover 43 is closed by the motor 44 to stop the natural ventilation operation by the natural ventilation unit 40 (step S4). At this time, the first damper 39a and the second damper 39b are opened to operate the waste heat recovery exchanger 30, and the exhaust fan 37a and the air supply fan are configured to exchange heat between the indoor and outdoor air in the heat exchanger 35. 37b) is driven to artificially ventilate at the same time as the heat exchange of the indoor and outdoor air (step S5).

Thereafter, when the ventilation drive time of the waste heat recovery exchange unit 30 has elapsed by a set value, the driving of the waste heat recovery exchange unit 30 is stopped for a predetermined time (steps S6 and S7).

On the other hand, when the indoor and outdoor temperature difference is detected by the temperature measuring unit 10 less than a predetermined value, the cover 43 of the natural ventilation unit 40 is opened (step S8).

At this time, the first damper 39a and the second damper 39b are closed so that the operation of the waste heat recovery exchanger 30 is stopped, and the driving of the exhaust fan 37a and the air supply fan 37b is stopped to allow the waste heat recovery exchanger 30 to stop. Artificial ventilation by 30 is not made (step S9).

Thereafter, when the natural ventilation time by the natural ventilation unit 40 passes by the set value, the operation of the natural ventilation is stopped (step S10).

Therefore, when natural ventilation is performed by the control unit while the user closes the window, an obstacle in the opening 41 located in the frame 42 corresponding to the width corresponding to the thickness of the window chassis 82 is different from that of the conventional air passage. Since natural ventilation is achieved without being bound by, it is possible to save energy by not requiring a blower device for ventilation.

10: temperature measuring unit 20: window opening and closing detection unit
30: waste heat recovery exchange part 31: housing
31a: Outdoor air supply and exhaust 31b: Indoor air supply and exhaust
32: bulkhead 33a: exhaust duct
33b: air supply duct 35: heat exchanger
36a: exhaust motor 36b: air supply motor
37a: exhaust fan 37b: air supply fan
39a: first damper 39b: second damper
40: natural ventilation portion 41: opening
42: frame 43: cover
44: motor 50: power supply
60: control unit 70: wall
80: natural ventilation window 82: window chassis
84: windows

Claims (13)

A temperature measuring unit 10 for measuring indoor and outdoor temperatures;
A window opening and closing detection unit 20 for detecting whether the window chassis 82 of the natural ventilation window 80 is opened or closed;
In the case where the door of the window chassis 82 of the natural ventilation window 80 is closed by the window opening / closing detection unit 20, when the indoor / outdoor temperature differs by more than a predetermined temperature by the temperature measuring unit 10, the waste heat recovery is performed. Waste heat recovery exchange unit 30 for the ventilation is made at the same time as the heat exchange;
In the case where the door of the window chassis 80 of the natural ventilation window 80 is closed by the window opening / closing detection unit 20, natural ventilation is possible when the indoor / outdoor temperature is different by less than a predetermined temperature by the temperature measuring unit 10. A natural ventilation unit 40 provided at one side of the window chassis 82 of the natural ventilation window 80;
A power supply unit 50 for supplying power to the waste heat recovery exchange unit 30 and the natural ventilation unit 40; And
Hybrid ventilation for energy saving, characterized in that it comprises a control unit 60 for controlling the temperature measuring unit 10, the window opening and closing detection unit 20, waste heat recovery exchange unit 30 and natural ventilation unit 40 system. The hybrid ventilation system for energy saving according to claim 1, wherein the temperature measuring part (10) is composed of two temperature measuring devices, each provided indoor and outdoor. According to claim 1, The window opening and closing detection unit 20 is provided with a magnetic sensor and a magnetic sensor in each of the natural ventilation window 80 and the window chassis 82 to detect whether the door of the window chassis 82 is open Hybrid ventilation system for energy saving, characterized in that by detecting a change in the magnetic field according to the separation between the windows chassis (82) is opened. According to claim 1, The window opening and closing detection unit 20 is a hybrid ventilation system for energy saving, characterized in that consisting of an infrared sensor, proximity switch or contact switch. The waste heat recovery exchange part (30) according to claim 1, wherein the waste heat recovery exchange part (30) has a housing (31) having an outdoor air supply / exhaust mechanism (31a) and an indoor air supply / exhaust mechanism (31b) at both ends and a partition wall (32) in the housing (31). It is partitioned by the exhaust duct 33a for exhausting indoor air, the air supply duct 33b for outdoor air supply, and the energy for delivering energy to the outdoor air with respect to the cooling and heating energy of the indoor air in the center of the main body of the housing 31. Located on one side of the heat exchanger 35 and the exhaust duct 33a, the exhaust fan 37a coupled to the exhaust motor 36a for exhausting indoor air is located on one side of the air supply duct 33b to supply the outdoor air. An air supply fan 37b coupled to an air supply motor 36b for discharging, a first damper 39a for opening and closing a flow path of the exhaust duct 33a, and an air supply duct 33b Located at one side of the second damper (39b) for opening and closing the flow path of the air supply duct 33b, characterized in that The hybrid ventilation systems for energy savings. 6. The temperature measuring unit according to claim 5, wherein the first damper (39a) and the second damper (39b) have a temperature indicating unit when a signal indicating that the natural ventilation window (80) is closed by the window opening / closing detection unit (20) is detected. When the indoor and outdoor temperature difference is different by a predetermined value or more by (10), when the waste heat recovery exchange unit 30 is operated by the control unit 60, it is controlled to be opened, and the flow of indoor and outdoor air passing through the heat exchanger 35. In order to smoothly, the exhaust fan (37a) and the air supply fan (37b) is a hybrid ventilation system for energy saving, characterized in that driven by the control unit (60). The method of claim 5, wherein when the signal indicating that the natural ventilation window 80 is closed by the window opening and closing detection unit 20 is detected by the temperature measuring unit 10 the indoor and outdoor temperature difference is less than a certain value In this case, the control unit 60 is controlled to close the first damper 39a and the second damper 39b so that the operation of the waste heat recovery exchanger 30 is stopped and the natural ventilation unit 40 is operated. The exhaust fan (37a) and the air supply fan (37b) is a hybrid ventilation system for energy saving, characterized in that the drive is stopped by the control unit (60). The method according to claim 5, wherein, when a signal indicating that the natural ventilation window 80 is opened by the window opening / closing detection unit 20 is detected, the temperature measurement unit 10 determines whether the indoor / outdoor temperature difference is more than a predetermined value. The first damper 39a and the second damper 39b are controlled to be closed by the controller 60 so that the operation of the waste heat recovery exchanger 30 is stopped by the controller 60 without causing the exhaust fan 37a to be closed. The supercharge fan (37b) is a hybrid ventilation system for energy saving, characterized in that the drive is stopped by the control unit (60). According to claim 1, The natural ventilation unit 40, Frame 42 having an opening 41 for natural ventilation is formed integrally with the window chassis 82 on one side of the window chassis 82, the opening ( 41 is coupled to the frame 42 and hinged to the cover 42 for inducing or stopping natural ventilation, and the end of the cover 43 and the frame 42 to electrically open and close the cover 43 is coupled Hybrid ventilation system for energy savings, characterized in that consisting of a motor (44). 10. The method of claim 9, wherein when the signal indicating that the window is closed by the window opening and closing detection unit 20 is detected by the temperature measuring unit 10 when the indoor and outdoor temperature is less than a certain value control unit 60 By operating the motor 44 of the natural ventilation unit 40 to open the cover 43 is characterized in that the natural ventilation is achieved by convection without artificial blowing through the opening 41 of the natural ventilation unit 40 Hybrid ventilation system for energy saving. 10. The method of claim 9, wherein when the signal indicating that the window is closed by the window opening and closing detection unit 20 is detected by the temperature measuring unit 10 when the indoor and outdoor temperature difference is more than a predetermined value difference control unit 60 ) Stops the natural ventilation operation by the natural ventilation unit 40 by operating the motor 44 of the natural ventilation unit 40 to close the cover 43 and at the same time heat exchange by the waste heat recovery exchange unit 30 Hybrid ventilation system for energy saving, characterized in that the artificial ventilation is achieved through. According to claim 1, The natural ventilation unit 40 is installed through the outer wall instead of being provided on one side of the window chassis 82 of the natural ventilation window 80, the transmission for opening and blocking the flow path of the natural ventilation Hybrid ventilation system for energy saving, characterized in that it comprises a damper. Confirming whether the window is opened by the user by the window opening / closing detection unit 20 (step S1);
If a signal indicating that the window is opened is detected by the window opening / closing detection unit 20, the driving of the exhaust fan 37a and the air supply fan 37b is stopped to stop the operation of the waste heat recovery exchanger 30, and the first operation is performed. Allowing the damper 39a and the second damper 39b to close (step S2);
Detecting the indoor / outdoor temperature difference by the temperature measuring unit 10 if the window is closed (step S3);
If the indoor and outdoor temperature difference is more than a predetermined value step (S4 step) so that the cover 43 is closed by the motor 44 so that the natural ventilation operation by the natural ventilation unit 40 is stopped;
At this time, the first damper 39a and the second damper 39b are opened to operate the waste heat recovery exchanger 30, and the exhaust fan 37a and the air supply fan are configured to exchange heat between the indoor and outdoor air in the heat exchanger 35. 37b) is driven to artificially ventilate at the same time as the heat exchange of the indoor and outdoor air (step S5);
Thereafter, when the ventilation drive time of the waste heat recovery exchange unit 30 has elapsed by a predetermined value, stopping the driving of the waste heat recovery exchange unit 30 for a predetermined time (steps S6 and S7);
Opening the cover 43 of the natural ventilation unit 40 when the indoor / outdoor temperature difference is detected by the temperature measuring unit 10 below a predetermined value (step S8);
At this time, the first damper 39a and the second damper 39b are closed so that the operation of the waste heat recovery exchanger 30 is stopped, and the driving of the exhaust fan 37a and the air supply fan 37b is stopped to allow the waste heat recovery exchanger 30 to stop. Preventing artificial ventilation by the step (30) (step S9); And
Thereafter, when the natural ventilation time by the natural ventilation unit 40 has elapsed by a set value, the ventilation method of the hybrid ventilation system for energy saving, comprising the step (S10) of stopping the operation of the natural ventilation.

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