CN207831574U - Air interchanger - Google Patents

Abstract

The utility model provides a ventilation device, which uses a total heat exchanger to reduce the temperature difference between indoor and outdoor, and can prevent outdoor air from flowing into the indoor according to needs, purify the indoor air and make it recirculate into the indoor. According to an embodiment of the utility model, the ventilating device includes: a casing equipped with an indoor suction part, an indoor discharge part, an outdoor suction part, and an outdoor discharge part; The exhaust part exhausts air; the air purification filter is installed between the outdoor suction part and the first air supply part; the second air supply part is installed inside the housing and discharges the air flowing into the indoor suction part to the outdoor discharge part ; The total heat exchanger is configured between the first air supply part and the air purification filter, and makes the air flowing to the first air supply part and the air flowing to the second air supply part carry out heat exchange; the circulation flow path, Connected from the indoor suction part to the air purification filter; and the baffle member, which opens and closes the circulation flow path.

Description

Ventilator

technical field

The utility model relates to a ventilating device, more specifically, relates to a ventilating device with an operating mode that prevents external air from flowing in and circulates indoor air.

Background technique

A general ventilator or air conditioner is a device that exhausts indoor air to the outside, purifies the outdoor air, and allows it to flow into the room.

Also, in such ventilators or air conditioners, since there is a temperature difference between indoor and outdoor air, some types use a total heat exchanger to exchange heat between the air discharged outside and the air flowing into the room to minimize The degree of change in room temperature.

However, due to the flow path structure characteristics of the total heat exchanger (the structure in which the suction flow path and the exhaust flow path are separated), the ventilation device using the total heat exchanger in the prior art is difficult to generate indoor air through the inside of the device. Disadvantages of recirculating flow of room air after the filter reflows into the room.

Patent Grant Publication No. 10-1572002 discloses a ventilator without a function of circulating indoor air according to the prior art.

Prior Art Document: (Patent Document 1) KR 10-1572002 B1

Utility model content

The utility model is obtained in order to solve at least part of the above-mentioned problems in the prior art. On the one hand, the purpose is to provide a ventilation device, which uses a total heat exchanger to reduce the temperature difference between indoor and outdoor, and can Keep the outdoor air from flowing into the room, purify the indoor air and recirculate it into the room. In order to achieve at least part of the above objectives, the utility model provides a ventilator comprising: a casing equipped with an indoor suction part, an indoor discharge part, an outdoor suction part and an outdoor discharge part; the inside of the casing, and discharge air to the indoor discharge part; an air purification filter is provided between the outdoor suction part and the first air supply part; a second air supply part is provided in the casing body, and discharge the air flowing into the indoor suction part to the outdoor discharge part; a total heat exchanger is arranged between the first air supply part and the air purification filter, and makes the heat exchange between the air flowing through the first air supply unit and the air flowing toward the second air supply unit; the circulation flow path is connected from the indoor suction unit to the air purification filter; and the baffle member is opened. Close the circulation flow path.

In addition, the ventilation device according to an embodiment of the present invention may include: a dust sensor for measuring the concentration of dust in the indoor air; a carbon dioxide sensor for measuring the concentration of carbon dioxide in the indoor air; an air quality sensor for measuring the concentration of odorous substances in the indoor air and radon concentration; the indoor air temperature sensor measures the temperature of the indoor air; the outdoor air temperature sensor measures the temperature of the outdoor air; the control unit uses the dust sensor, the carbon dioxide sensor, the air quality sensor, Operations of the first air blowing part, the second air blowing part, the louver, and the shutter member are controlled based on the measured values of the indoor air temperature sensor and the outdoor air temperature sensor.

In addition, the ventilation device according to an embodiment of the present invention has an indoor circulation mode, and in the indoor circulation mode, the indoor air is discharged into the room after passing through the air purification filter through the circulation flow path.

According to an embodiment of the present invention having such a structure, the indoor temperature variation can be minimized by using the total heat exchanger, and the indoor air can be purified and circulated indoors by preventing outdoor air from flowing into the indoor room as needed.

Description of drawings

Fig. 1 shows a front perspective view of a ventilation device according to an embodiment of the present invention.

Fig. 2 is a rear perspective view of the ventilator shown in Fig. 1 .

Fig. 3 is a sectional view of the ventilation device shown in Fig. 1 along the line A-A'.

Fig. 4 is a sectional perspective view of the ventilation device shown in Fig. 1 along line B-B'.

Fig. 5 shows the first air supply part and the second air supply part included in the ventilation device shown in Fig. 1 .

Fig. 6 is a perspective view showing the lead-out structure of an air purification filter and a total heat exchanger included in the ventilator shown in Fig. 1 .

Fig. 7 is a side sectional view showing the operation of the ventilator shown in Fig. 1 in a ventilation cleaning mode.

Fig. 8 is a side sectional view showing the operation of the ventilator shown in Fig. 1 in an indoor circulation mode.

Fig. 9 is a side sectional view showing the operation of the ventilator shown in Fig. 1 in a low temperature change type ventilating mode.

Fig. 10 is a side sectional view showing the operation of the ventilator shown in Fig. 1 in a high-speed circulation mode.

Fig. 11 is a side sectional view showing the operation of the ventilator shown in Fig. 1 in a forced exhaust mode.

Fig. 12 is a side sectional view showing the operation of the ventilator shown in Fig. 1 in a natural exhaust mode.

Explanation of reference signs

100: ventilation device

110: Housing 111: Indoor suction part

112: Indoor discharge part 113: Outdoor suction part

114: Outdoor discharge part 117: Filter outlet

118: Filter cover 120: First air supply part

122: Double suction centrifugal fan 124: Fan motor

130: Second air supply unit 132: Single-suction centrifugal fan

134: Grille part 140: Air purification filter

150: total heat exchanger 151: first inflow end

152: First discharge port 153: Second inflow port

154: Second discharge end 160: Shutter

170: Exhaust flow path 180: Circulation flow path

190: Bezel assembly 200: Dust sensor

210: CO2 sensor 220: Air quality sensor

230: Indoor air temperature sensor 240: Outdoor air temperature sensor

Detailed ways

The terms used in this specification are only used to describe specific embodiments, and are not intended to limit the present utility model. In addition, singular expressions in this specification include plural expressions unless the context clearly indicates otherwise.

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

First, the configuration of a ventilation device 100 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 7 .

As shown in Figures 1 to 7, the ventilation device 100 according to an embodiment of the present invention may include a housing 110, a first air supply part 120, a second air supply part 130, an air purification filter 140, a total heat exchange device 150, louvers 160, exhaust flow path 170, circulation flow path 180, baffle member 190, dust sensor 200, carbon dioxide sensor 210, air quality sensor 220, indoor air temperature sensor 230, outdoor air temperature sensor 240 and a control unit.

The casing 110 constitutes the appearance of the ventilation device 100 according to an embodiment of the present invention, and can be installed through the wall of a building.

When the casing 110 is installed through the wall, it can be divided into the indoor side arranged indoors and the outdoor side arranged outdoors.

In addition, the housing 110 may be equipped with an indoor suction part 111 , an indoor discharge part 112 , an outdoor suction part 113 and an outdoor discharge part 114 .

At this time, when the housing 110 is installed on the building wall, the indoor suction part 111 is provided on the indoor side of the housing 110 to form a path for indoor air to flow into the housing 110, and the indoor exhaust part 112 is provided on the indoor side of the housing 110. Thus, a path for exhausting the air inside the housing 110 into the room is formed.

In addition, when the casing 110 is installed on the building wall, the outdoor suction part 113 is arranged on the outdoor side of the casing 110 to form a path for outdoor air to flow into the inside of the casing 110, and the outdoor discharge part 114 is arranged on the outdoor side of the casing 110 so that A path for exhausting the air inside the housing 110 to the outside is formed.

In one embodiment, the indoor suction part 111 and the indoor discharge part 112 can be configured in a state of being open all the time, and the outdoor suction part 113 and the outdoor discharge part 114 can be configured to be openable and closable by the louvers 160 described later, but it is not limited thereto. The indoor suction unit 111 and the indoor discharge unit 112 may be configured to be openable and closable by separate opening and closing members.

The first blower unit 120 is provided inside the housing 110 , and the air inside the housing 110 can be discharged to the indoor discharge unit 112 .

In one embodiment, as shown in FIGS. 3 to 5 , the first air supply unit 120 includes a pair of double-suction centrifugal fans 122 arranged side by side in the axial direction, and a fan that rotates the pair of double-suction centrifugal fans 122 together. Motor 124.

As shown in FIG. 3 , in the first air supply unit 120 including a pair of double-suction centrifugal fans 122 , the double-suction centrifugal fans 122 can suck air from both sides, thereby generating a large air suction force.

In addition, a discharge part of a pair of double-suction centrifugal fans 122 may be disposed opposite to the indoor discharge part 112 .

The second blower 130 may be provided inside the housing 110 and discharge the air flowing into the indoor suction part 111 to the outdoor discharge part 114 .

In one embodiment, as shown in Fig. 4 and Fig. 5, the second air supply part 130 is arranged on the bottom side of the casing 110, so that it can be equipped at the lower end of the total heat exchanger 150 described later, and can be provided by a single-suction centrifugal The fan 132 is configured, and the single-suction centrifugal fan 132 is arranged such that the suction port faces the total heat exchanger 150 and the discharge port faces the outdoor discharge part 114 , but the present invention is not limited thereto.

In addition, in an embodiment, in order to achieve a large suction force, the second air supply unit 130 may include a plurality of single-suction centrifugal fans 132 arranged along the length direction of the total heat exchanger 150 , but it is not limited thereto.

In addition, in an embodiment, a grid member 134 may be provided between the outdoor discharge part 114 and the second blower part 130 . The grid member 134 prevents foreign foreign matter flowing into the casing 110 through the outdoor discharge portion 114 from flowing into the second air blowing portion 130 .

The air purification filter 140 may be provided between the outdoor suction part 113 and the first blower part 120 and filter passing air.

In one embodiment, the air purification filter 140 may be arranged at a distance from the outdoor suction unit 113 , and a circulation flow path 180 described later may be formed between the outdoor suction unit 113 and the air purification filter 140 .

The total heat exchanger 150 can be arranged between the first air supply part 120 and the air purification filter 140, and can make the air flowing to the first air supply part 120 and the air flow to the second air supply part 130 heat exchange.

Although not shown, in one embodiment, the total heat exchanger 150 is configured so that the chambers (not shown) formed along the front-rear direction and the chambers (not shown) formed along the up-down direction can conduct heat transfer with each other, thereby The air flowing toward the chamber in the front-back direction and the air flowing in the chamber in the up-and-down direction can exchange heat with each other.

The total heat exchanger 150 of this structure may be equipped with a first inflow port 151 , a first discharge port 152 , a second inflow port 153 and a second discharge port 154 .

The first inflow end 151 corresponds to one end of the chamber in the front-rear direction, and is a portion where the air passing through the air purification filter 140 flows in.

In addition, the first discharge end 152 is formed on the opposite side of the first inflow end 151 , corresponds to the other end of the front-rear direction chamber and discharges the air flowing toward the front-rear direction chamber to the first air blower 120 .

In addition, the second inflow end 153 corresponds to one end of the chamber in the vertical direction, and is a portion for inflowing the air that flows into the housing 110 through the chamber suction portion 111 .

Also, the second discharge end 154 is formed on the opposite side of the second inflow end 153 , corresponding to the other end of the vertical chamber, and is a part that discharges the air flowing in the vertical chamber to the second air blower 130 .

The shutter 160 can open and close the outdoor suction part 113 and the outdoor discharge part 114 . In one embodiment, the louver 160 may be equipped to cover the outdoor suction part 113 and the outdoor discharge part 114 , and may be configured to be rotatable toward the outside of the casing 110 .

The louver 160 can adjust the rotation angle to adjust the opening area of the outdoor suction part 113 and the outdoor discharge part 114 .

The exhaust flow path 170 is formed inside the casing 110 and serves as an air flow path, and can be connected from the indoor suction portion 111 to the second inflow end 153 of the total heat exchanger 150 .

The circulation flow path 180 is formed inside the housing 110 as a path for air flow, and can be connected from the indoor suction portion 111 to the air purification filter 140 . That is, the circulation flow path 180 may be formed so that the air flowing into the housing 110 through the indoor suction part 111 may pass through the air purification filter 140 .

In one embodiment, the circulation flow path 180 may extend from the exhaust flow path 170 to between the air purification filter 140 and the outdoor suction part 113 .

In addition, such a circulation flow path 180 may be extended to the outdoor discharge part 114 . Therefore, when the outdoor discharge unit 114 is closed by the louver 160 , the air discharged from the second blower unit 130 flows into the circulation flow path 180 and can pass through the air purification filter 140 .

The baffle member 190 can open and close the circulation flow path 180 .

For this reason, in one embodiment, the baffle member 190 may be provided at the boundary of the exhaust flow path 170 and the circulation flow path 180 .

In addition, in an embodiment, the baffle member 190 may be configured to have an adjustable opening rate. The baffle member 190 can adjust the flow rate of the air flowing into the exhaust flow path 170 into the total heat exchanger 150 and the flow rate of the air flowing into the circulation flow path 180 by adjusting the opening rate.

In addition, in one embodiment, the total heat exchanger 150 and the air purification filter 140 can be configured to slide toward one side of the housing 110 so as to be introduced and drawn out of the housing 110 .

For this reason, in an embodiment, as shown in FIG. 6 , a filter outlet 117 may be formed on one side of the casing 110 .

The total heat exchanger 150 and the air purification filter 140 can be easily extracted to the outside of the case 110 through the filter outlet 117 . At this time, the user can move the housing 110 as a whole to the indoor side and then lead out the total heat exchanger 150 and the air purification filter 140 indoors, so that the total heat exchanger 150 and the air purification filter 140 drawn out are not affected by the wall. put one's oar in.

In addition, in an embodiment, a filter cover 118 that covers the filter outlet 117 may be attached to the casing 110 .

The dust sensor 200 may be provided outside the indoor side of the housing 110 so as to measure the dust concentration in the indoor air.

The carbon dioxide sensor may be provided outside the indoor side of the case 110 so as to measure the concentration of carbon dioxide in the indoor air.

The air quality sensor 220 may be provided on the outside of the indoor side of the housing 110 so as to measure the concentration of malodorous substances and the concentration of radon (Radon) in the indoor air.

The indoor air temperature sensor 230 may be provided outside the indoor side of the housing 110 so as to measure the temperature of the indoor air.

The outdoor air temperature sensor 240 may be provided outside the outdoor side of the housing 110 so as to measure the temperature of the outdoor air.

In addition, the control unit (not shown) controls the first blower unit 120, the second blower unit 120, and the first fan unit based on the measurement values of the dust sensor 200, the carbon dioxide sensor 210, the air quality sensor 220, the indoor air temperature sensor 230, and the outdoor air temperature sensor 240. Two operations of the blower unit 130, the louver 160 and the baffle member 190.

In addition, the embodiments shown in Figure 1 and Figure 2 are different, the dust sensor 200, the carbon dioxide sensor 210, the air quality sensor 220, the indoor air temperature sensor 230 and the outdoor air temperature sensor 240 in another embodiment of the present invention can be Located away from the housing 110 , the control unit may be configured to receive the values measured by the dust sensor 200 , the carbon dioxide sensor 210 , the air quality sensor 220 , the indoor air temperature sensor 230 and the outdoor air temperature sensor 240 through wired or wireless.

Hereinafter, the operation of each operation mode of the ventilation device 100 according to an embodiment of the present invention will be described with reference to FIG. 7 to FIG. 12 .

The operating modes of the ventilation device 100 according to an embodiment of the present invention may include ventilation and purification mode, indoor circulation mode, low temperature variation ventilation mode, high-speed circulation mode, forced exhaust mode and natural exhaust mode.

FIG. 7 shows the ventilation cleaning mode of the ventilation device 100 .

As shown in FIG. 7 , in the ventilation and purification mode, the indoor air can be exhausted to the outside, and the outdoor air can flow into the room through the air purification filter 140 . At this time, the air discharged from the room to the outside and the air flowed into the room from the outside may exchange heat in the total heat exchanger 150 .

This ventilation and purification mode can be manually executed according to the user's control command, or can be automatically executed by the control unit based on the measured values of the carbon dioxide sensor 210 , the indoor air temperature sensor 230 and the outdoor air temperature sensor 240 .

When the ventilation and purification mode is automatically executed, when the carbon dioxide concentration in the indoor air is above the preset carbon dioxide concentration, and the temperature difference between the indoor air and the outdoor air is above the preset first temperature difference, the control unit can operate The first blower unit 120 and the second blower unit 130 open the louvers 160 and close the baffle members 190 to execute the ventilation and purification mode.

At this time, the outdoor air is sucked into the outdoor suction part 113 by the suction force of the first blower part 120 and can be discharged into the room through the air purification filter 140 and the total heat exchanger 150 . In addition, the indoor air is sucked into the indoor suction part 111 by the suction force of the second air blowing part 130 , and can pass through the total heat exchanger 150 and be discharged to the outside through the outdoor discharge part 114 .

Here, since the baffle member 190 closes the circulation flow path 180, all the air sucked by the indoor suction portion 111 and flowing into the exhaust flow path 170 can pass through the total heat exchanger 150 and be discharged to the outside.

If such a ventilation purification mode is performed, outdoor air with low carbon dioxide concentration and high oxygen concentration can be filtered through the air purification filter 140 and flow into the room, and indoor air with high carbon dioxide concentration can be exhausted outside.

FIG. 8 shows the indoor circulation mode of the ventilation device 100 .

As shown in FIG. 8 , in the indoor circulation mode, outdoor air can be prevented from flowing into the room, and the indoor air can pass through the air purification filter 140 through the circulation flow path 180 and then be discharged into the room again.

This indoor circulation mode can be manually executed according to a user's control command, or can be automatically executed by the control unit based on the measured values of the dust sensor 200 and the carbon dioxide sensor 210 .

When the indoor circulation mode is automatically executed, when the dust concentration in the indoor air is above the preset first dust concentration, and the carbon dioxide concentration in the indoor air is less than the preset carbon dioxide concentration, the control unit can operate the first air supply part 120 and stop the second air blowing part 130, close the louver 160 and open the damper part 190, thereby executing the indoor circulation mode.

At this time, the indoor air can flow into the exhaust flow path 170 through the indoor suction portion 111 according to the suction force of the first blower unit 120, and the air flowing into the exhaust flow path 170 can flow into the circulation flow path 180 according to the first blower unit. The suction force of 120 passes through the air purification filter 140 and the total heat exchanger 150 and is discharged back into the room.

Here, since the louver 160 is in a state of closing the outdoor suction part 113 and the outdoor discharge part, outdoor air does not flow into the room.

The carbon dioxide concentration of the indoor air in this indoor circulation mode is relatively low, and it is a working mode suitable for purifying the indoor air without introducing outdoor air when the dust concentration in the outdoor air is high.

FIG. 9 shows a low temperature change ventilation mode of the ventilation device 100 .

As shown in Figure 9, in the low temperature change type ventilation mode, a part of the indoor air can be discharged to the outside, and the remaining part can be discharged to the room after passing through the air purification filter 140 through the circulation flow path 180, and at the same time, the outdoor air It can also flow into the room after passing through the air purification filter 140 .

That is, the low temperature change ventilation mode is an operation mode in which the ventilation purification mode and the indoor circulation mode are executed simultaneously.

This low temperature change ventilation mode can be manually executed according to the user's control command, or can be automatically executed by the control unit based on the values measured by the carbon dioxide sensor 210 , the indoor air temperature sensor 230 and the outdoor air temperature sensor 240 .

When the low temperature change type ventilation mode is automatically executed, when the carbon dioxide concentration in the indoor air is above the preset carbon dioxide concentration, and the temperature difference between the indoor air and the outdoor air is above the preset second temperature difference, the control The first blowing part 120 and the second blowing part 130 may be operated, the shutter 160 may be opened, and the baffle member 190 may be opened, thereby performing a low temperature variation type ventilation mode.

At this time, the outdoor air may flow in through the outdoor suction part 113 according to the suction force of the first blower part 120 and then be discharged indoors through the air purification filter 140 and the total heat exchanger 150 . In addition, the indoor air can flow into the exhaust flow path 170 through the indoor suction portion 111 according to the suction force of the first blower unit 120 and the second blower unit 130, and the part of the air flowing into the exhaust flow path 170 can be controlled by the second blower unit. The suction force of the air part 130 passes through the total heat exchanger 150 and then is discharged to the outside through the outdoor discharge part 114, and the rest of the air flowing into the exhaust flow path 170 flows to the circulation flow path 180 according to the suction force of the first air supply part 120. After that, it passes through the air purification filter 140 and the total heat exchanger 150 and is discharged into the room again.

In one embodiment, in the low temperature change ventilation mode, in order to increase the heat exchange rate between the indoor air and the outdoor air, the control unit can make the second air supply unit 130 increase the air volume of the first air supply unit 120 Low air volume operation.

When the second air supply unit 130 is operated at a low air volume, since the flow velocity of the indoor air passing through the total heat exchanger 150 is low, the heat transferred to the outdoor air passing through the total heat exchanger 150 is increased, thereby reducing the indoor temperature variation. .

In addition, in the low temperature change type ventilation mode, if the baffle member 190 is opened too much, most of the air flowing into the exhaust flow path 170 flows into the circulation flow path 180 due to the suction force of the first blower unit 120 , and flows into the entire flow path 180 . The flow rate of the heat exchanger 150 is reduced, thereby reducing the effect of increasing the temperature of the outdoor air.

In order to prevent this, in one embodiment, the control unit may open the shutter member 190 at an opening rate of 80% or less in the low temperature change ventilation mode, but the present invention is not limited thereto.

In addition, the second temperature difference which is an execution condition value of the low temperature variation type ventilation mode is set to be larger than the first temperature difference which is an execution condition value of the ventilation purification mode.

That is, the low temperature change ventilation mode is suitable for a small amount of ventilation by minimizing indoor temperature changes when the indoor air has a high carbon dioxide concentration and needs to be ventilated, but the temperature difference between the indoor air and the outdoor air is large. Operating mode.

FIG. 10 shows the high speed cycle mode of the ventilation device 100 .

As shown in FIG. 10 , in the high-speed circulation mode, the outdoor air can be prevented from flowing into the room, and the indoor air can flow into the circulation flow path 180 according to the suction force of the first air supply unit 120 and the suction force of the second air supply unit 130 and pass through the air circulation path. After cleaning the filter 140, it is discharged into the room again.

This high-speed circulation mode can be manually executed according to the user's control command, and can also be automatically executed by the control unit based on the measurement values of the dust sensor 200 and the carbon dioxide sensor 210 .

When the high-speed circulation mode is automatically executed, when the dust concentration in the indoor air is above the preset second dust concentration, and the carbon dioxide concentration in the indoor air is less than the preset carbon dioxide concentration, the control unit can operate the first air supply part 120 and the second air blowing part 130, close the louver 160 and close the baffle part 190, thereby executing the high-speed circulation mode.

At this time, the indoor air can flow into the exhaust flow path 170 through the indoor suction portion 111 according to the combined suction force of the first blower unit 120 and the second blower unit 130 , and flow into the exhaust flow path 170 . The air can be sucked into the second air supply unit 130 and discharged into the circulation flow path 180 and then discharged into the room through the air purification filter 140 and the total heat exchanger 150 .

At this time, since the louver 160 is in a state of closing the outdoor suction part 113 and the outdoor discharge part, all the air discharged through the second blower part 130 passes through the air cleaning filter 140 .

This high-speed circulation mode is a working mode suitable for quickly purifying indoor air when the concentration of carbon dioxide is low, but the dust concentration of the indoor air is higher than a certain level and the dust concentration does not decrease after a certain period of time.

Therefore, the second dust concentration as an execution condition of the high-speed circulation mode may be set higher than the first dust concentration as an execution condition of the indoor circulation mode.

FIG. 11 shows the forced exhaust mode of the ventilation device 100 .

As shown in FIG. 11 , in the forced exhaust mode, indoor air may be forcibly exhausted to the outside according to the suction force of the second air blowing unit 130 .

This forced exhaust mode may be manually executed by a user's control command, or may be automatically executed by the control unit based on the measurement value of the air quality sensor 220 .

When the forced exhaust mode is automatically executed, when the concentration of malodorous substances and radon in the indoor air is above the preset concentration, the control unit can stop the first air supply unit 120 and operate the second air supply unit 130, open the shutters 160 and The shutter member 190 is closed, thereby performing the forced exhaust mode.

At this time, the indoor air may be sucked in by the indoor suction part 111 according to the suction force of the second blower part 130 and then discharged to the outside through the outdoor discharge part.

At this time, since the louver 160 is in the state of opening the outdoor suction part 113 and the outdoor discharge part, although the outdoor air can flow into the room through the outdoor suction part 113 and the indoor discharge part 112, but the first blower part 120 is in a state where the operation is stopped. So the flow into the room is very small.

This forced ventilation mode is a working mode suitable for quickly discharging polluted air to the outside when there is a large amount of malodorous substances or radon in the indoor air.

FIG. 12 shows the natural exhaust mode of the ventilation device 100 .

As shown in Figure 12, in the natural exhaust mode, indoor air can be exhausted to the outside through natural convection.

This natural exhaust mode can be manually executed according to specific control commands from the user.

If a control command to execute the natural exhaust mode is input, the control part may stop the first blowing part 120 and the second blowing part 130 , open the louver 160 and open the baffle part 190 .

In this case, a linear flow path formed by portions of the exhaust flow path 170 and the circulation flow path 180 may be formed between the indoor suction portion 111 and the outdoor suction portion 113 .

Therefore, the indoor air can flow into the housing 110 through the indoor suction part 111 and then be discharged to the outside through the outdoor suction part 113; .

This natural exhaust mode is a working mode suitable for exchanging indoor air without consuming electric power when the dust concentration in the outdoor air is low and the temperature difference between indoor and outdoor is small.

Although the specific embodiments of the present utility model have been illustrated, as long as those skilled in the art can make various modifications to the present utility model within the scope of the idea and field of the utility model described in the above claims modification and deformation.

Claims (19)

1. A ventilation device, characterized in that the ventilation device comprises: A housing equipped with an indoor suction portion, an indoor discharge portion, an outdoor suction portion, and an outdoor discharge portion; a first air supply unit provided inside the casing, and exhausts air to the indoor discharge unit; an air purification filter arranged between the outdoor suction part and the first air supply part; a second air supply unit provided inside the casing, and discharges the air flowing into the indoor suction unit to the outdoor discharge unit; a total heat exchanger disposed between the first air supply unit and the air purification filter, and separates the air flowing toward the first air supply unit and the air flowing toward the second air supply unit heat exchange; a circulation flow path connected from the indoor suction part to the air purification filter; and The baffle member opens and closes the circulation flow path. 2. The ventilation device according to claim 1, wherein the total heat exchanger comprises: a first inflow end, through which air passing through the air purification filter flows into the first inflow end; a first discharge end, formed on the opposite side of the first inflow end; a second inflow end, into which the air that flows into the inside of the housing through the indoor suction portion flows into the second inflow end; and a second discharge end, formed at the on the opposite side of the second inflow end, an exhaust flow path is formed inside the housing, and the exhaust flow path is connected from the indoor suction portion to the second inflow end, The circulation flow path is formed to extend from the exhaust flow path to between the air purification filter and the outdoor suction unit. 3. The ventilator according to claim 2, wherein the baffle member is provided at a boundary between the exhaust flow path and the circulation flow path. 4. The ventilation device according to claim 1, wherein the opening rate of the baffle member is adjustable. 5. The ventilator according to claim 1, characterized in that the ventilator includes a louver for opening and closing the outdoor suction part and the outdoor discharge part. 6. The ventilation device according to claim 1, wherein the total heat exchanger and the air purification filter are configured to slide toward one side of the housing so as to be able to In and out. 7. The ventilation device according to claim 5, wherein the ventilation device comprises: Dust sensor to measure the dust concentration in the indoor air; Carbon dioxide sensor, which measures the concentration of carbon dioxide in the indoor air; Air quality sensor, which measures the concentration of odorous substances and radon in the indoor air; The indoor air temperature sensor measures the temperature of the indoor air; The outdoor air temperature sensor measures the temperature of the outdoor air; a control unit that controls the first blower unit based on the measured values of the dust sensor, the carbon dioxide sensor, the air quality sensor, the indoor air temperature sensor, and the outdoor air temperature sensor , the operation of the second blower, the louver, and the baffle member. 8. The ventilation device according to claim 7, wherein the dust sensor, the carbon dioxide sensor, the air quality sensor, the indoor air temperature sensor and the outdoor air temperature sensor are connected from the housing body away from the setting, The control unit receives values measured by the dust sensor, the carbon dioxide sensor, the air quality sensor, the indoor air temperature sensor, and the outdoor air temperature sensor by wire or wirelessly. 9. The ventilation device according to claim 7, characterized in that, the ventilation device has: In the ventilation and purification mode, the indoor air is discharged to the outside, and the outdoor air flows into the room after passing through the air purification filter; and In the forced exhaust mode, the indoor air is exhausted to the outside by using the suction force of the second air supply unit. 10. The ventilation device of claim 9, wherein: When the carbon dioxide concentration in the indoor air is above a preset carbon dioxide concentration, and the temperature difference between the indoor air and the outdoor air is above a preset first temperature difference, the control unit operates the first blower and the second air supply unit, which opens the louver and closes the baffle member, thereby performing the air exchange and purification mode, When the concentration of malodorous substances and radon in the indoor air is above the preset concentration, the control unit stops the first air supply unit and operates the second air supply unit, opens the louvers and closes the shutters. plate assembly, thereby performing the forced exhaust mode. 11. The ventilation device according to claim 7, characterized in that, the ventilation device has an indoor circulation mode, and the indoor circulation mode makes the indoor air pass through the air purification filter through the circulation flow path and then re- Exhaust to the room. 12. The ventilation device of claim 11, wherein: When the dust concentration in the indoor air is above the preset first dust concentration and the carbon dioxide concentration in the indoor air is lower than the preset carbon dioxide concentration, the control unit operates the first blowing unit and stops the The second air supply unit closes the louver and opens the baffle member, thereby performing the indoor circulation mode. 13. The ventilation device according to claim 7, characterized in that, the ventilation device has a natural exhaust mode, and the natural exhaust mode discharges indoor air to the outside through natural convection, The control part stops the first air blowing part and the second air blowing part according to a specific command, opens the louver and opens the baffle part, thereby performing the natural exhaust mode. 14. The ventilation device according to claim 7, characterized in that, the ventilation device has a low temperature variation type ventilation mode, and the low temperature variation type ventilation mode discharges a part of indoor air to the outside, The remaining part passes through the air purification filter through the circulation flow path and is discharged into the room again, and at the same time, the outdoor air flows into the room after passing through the air purification filter. 15. The ventilation device of claim 14, wherein: When the carbon dioxide concentration in the indoor air is above a preset carbon dioxide concentration, and the temperature difference between the indoor air and the outdoor air is above a preset second temperature difference, the control unit operates the first air blowing unit and the second blowing unit, the louvers are opened and the baffle members are opened, thereby performing the low temperature change ventilation mode. 16 . The ventilator according to claim 15 , wherein the control unit operates the second blower unit with an air volume lower than that of the first air blower unit. 16 . 17. The ventilator according to claim 15, wherein the control unit opens the shutter member at an opening ratio of 80% or less. 18. The ventilation device according to claim 7, wherein the ventilation device has a high-speed circulation mode, and the high-speed circulation mode uses the suction force of the second air supply part to circulate the indoor air to the The flow path flows through the air cleaning filter and is discharged into the room again. 19. The ventilator of claim 18, wherein: When the dust concentration in the indoor air is above the preset second dust concentration, and the carbon dioxide concentration in the indoor air is lower than the preset carbon dioxide concentration, the control unit operates the first blowing unit and the The second air supply unit closes the louver and closes the baffle member, thereby executing the high-speed circulation mode.