KR20090132994A - A ventilating apparatus and method of controlling the same - Google Patents

Abstract

PURPOSE: A ventilation system and a control method thereof are provided to facilitate design and construction of a ventilation system by correctly discharging air to the outside and supplying air to the inside. CONSTITUTION: A control method of a ventilation system comprises following steps. The first temperature of air flowing into the first flow path and the second temperature of the air flowing into the second path are detected(502). The operation mode based on the detected temperature is selected comparing the first temperature and the second temperature(504). The operation of an electric heat exchanger is performed in the operation mode corresponding to a received operation command(506). The first flow path is classified into an air supply path when the first temperature requires a cold climate area mode operation. The second flow path is classified into an air supply path when the second temperature requires a cold climate area mode operation.

Description

Ventilation device and control method {A VENTILATING APPARATUS AND METHOD OF CONTROLLING THE SAME}

The present invention relates to a ventilator, and in particular, to vent the indoor air to the outside for the ventilation of the indoor space and to provide heat exchange between the indoor air discharged and the outdoor air sucked in the process of supplying the outdoor air to the indoor ventilation The present invention relates to a total heat exchanger and a control method thereof capable of reducing heat loss in time.

The electrothermal heat exchanger reduces the heat loss during ventilation by discharging indoor air to the outside for ventilation of the indoor space and allowing heat exchange between the discharged indoor air and the sucked outdoor air in the process of supplying the outdoor air to the indoor. It is a ventilation device to make it possible. To this end, the conventional electrothermal heat exchanger includes an air supply fan, an exhaust fan, a heat exchange element, and the like, as disclosed in Korean Patent Laid-Open Publication No. 2005-110253.

The air supply fan and the exhaust fan are installed in the air supply flow path and the exhaust flow path, respectively. When the air supply fan rotates, outdoor air is supplied to the interior through the air supply flow path, and when the air exhaust fan rotates, the indoor air is exhausted through the exhaust flow path to the outside. The heat exchange element is installed at the point where the air supply flow path and the exhaust flow path intersect to allow heat exchange between the air passing through the air supply flow path and the air passing through the exhaust flow path without mixing with each other.

In the conventional heat exchanger, the direction of the air supply and the exhaust port is fixed. When the heat exchanger is installed, if the direction of the heat exchanger is changed, the direction of the air supply and the exhaust port is also changed. In this mode, supply and exhaust in the normal direction cannot be achieved.

In order to solve such a problem, the present invention makes it easier to design and construct a ventilator more easily by ensuring that the exhaust to the outside and the air supply to the room are properly made in a desired direction regardless of the actual installation direction of the ventilator. The purpose is to make it happen.

Such a control method of a ventilation device including a first flow path and a second flow path includes: detecting a first temperature of air flowing into the first flow path and a second temperature of air flowing into the second flow path; The air supply flow path and the exhaust flow path are distinguished among the first flow path and the second flow path based on the first temperature and the second temperature.

Furthermore, when the above-mentioned first temperature is a temperature at which cold mode operation is required, the first flow path is divided into an air supply flow path; When the second temperature is a temperature at which cold mode operation is required, the second flow path is divided into an air supply flow path.

In addition, the temperature which the dew condensation of the above-mentioned ventilation apparatus is anticipated is -15 degrees C-0 degrees C or less.

Another control method of the ventilation device including the first flow path and the second flow path according to the present invention is to detect the first temperature of the air flowing into the first flow path and the second temperature of the air flowing into the second flow path. ; Determine whether cold mode operation is necessary based on the first temperature and the second temperature; If it is determined that cold mode operation is necessary, the air supply flow path and the exhaust flow path are distinguished among the first flow path and the second flow path based on the first temperature and the second temperature; Cold mode operation is carried out through separate supply and exhaust flow paths.

In addition, the above-mentioned cold mode operation is condensation prevention operation which variably controls the ratio of the air supply operation and the exhaust operation ratio of a ventilation apparatus.

In addition, it is determined that cold mode operation is required when any one of the above-described first temperature and second temperature is below 15 ° C-0 ° C.

The first flow path is divided into an air supply flow path when the first temperature described above is a temperature determined to be required for cold mode operation; When the second temperature is the temperature at which it is determined that the cold mode operation is necessary, the second flow path is divided into the air supply flow path.

Further, it is determined that both the first temperature and the second temperature described above are not a normal use environment of the ventilation device when the temperature determined to be cold mode operation is necessary; And indicating that the first temperature and the second temperature are not the normal use environment of the ventilator.

Ventilation comprising a first fan for allowing air to flow in a first flow path and a second fan for allowing air to flow in a second flow path according to the present invention, and a heat exchange element provided at an intersection point of the first flow path and the second flow path. Another control method of the apparatus comprises: detecting a first temperature of air entering the first flow path and a second temperature of air entering the second flow path; Determining whether condensation prevention operation of the ventilation device is necessary based on the first temperature and the second temperature; If it is determined that the dew condensation prevention operation is necessary, the air supply fan and the exhaust fan are distinguished among the first fan and the second fan based on the first temperature and the second temperature; Condensation prevention operation is performed by controlling the divided first and second fans.

In addition, the above-mentioned dew condensation prevention operation is a cold region mode operation which variably controls the ratio of the air supply operation and the exhaust operation ratio of a ventilation apparatus.

In addition, it is determined that cold mode operation is necessary when any one of the above-mentioned first temperature and second temperature is below -15 ° C-0 ° C.

The first flow path is divided into an air supply flow path when the first temperature described above is a temperature determined to be required for cold mode operation; When the second temperature is the temperature at which it is determined that the cold mode operation is necessary, the second flow path is divided into the air supply flow path.

Further, it is determined that both the first temperature and the second temperature described above are not a normal use environment of the ventilation device when the temperature determined to be cold mode operation is necessary; And indicating that the first temperature and the second temperature are not the normal use environment of the ventilator.

Ventilation device according to the invention, the first passage; A second flow path; A first temperature sensor for detecting a first temperature of air flowing into the first flow path; A second temperature sensor for detecting a second temperature of air flowing into the second flow path; And a controller configured to distinguish the air supply flow path and the exhaust flow path among the first flow path and the second flow path based on the first temperature and the second temperature.

In addition, the above-mentioned first temperature sensor is provided in an upstream portion of the first flow path; The second temperature sensor is provided in an upstream portion of the second flow path.

Another ventilation device according to the present invention, the first passage; A second flow path; A first temperature sensor for detecting a first temperature of air flowing into the first flow path; A second temperature sensor for detecting a second temperature of air flowing into the second flow path; It is determined whether the cold mode operation of the ventilation device is necessary based on the first temperature and the second temperature, and when it is determined that cold mode operation is necessary, the air supply flow path among the first flow path and the second flow path is based on the first temperature and the second temperature. And a control unit configured to divide the exhaust passage, and to perform a cold mode operation through the divided air supply passage and the exhaust passage.

In addition, the above-mentioned first temperature sensor is provided in an upstream portion of the first flow path; The second temperature sensor is provided in an upstream portion of the second flow path.

Another ventilation device according to the present invention includes a first fan for allowing air to flow in a first flow path; A second fan allowing air to flow in the second flow path; A heat exchange element provided at an intersection point of the first flow path and the second flow path; A first temperature sensor detecting a first temperature of air flowing into the first flow path; A second temperature sensor detecting a second temperature of air flowing into the second flow path; It is determined whether cold mode operation is necessary based on the first temperature and the second temperature, and when it is determined that cold mode operation is necessary, the air supply fan and the exhaust fan among the first fan and the second fan based on the first temperature and the second temperature. And a controller configured to control the divided first and second fans to perform cold mode operation.

In addition, the above-mentioned first temperature sensor is provided in an upstream portion of the first flow path; The second temperature sensor is installed upstream of the second flow path.

The ventilator and control method thereof according to the present invention for this purpose are designed to allow the exhaust and air supply to be correctly made in the desired direction irrespective of the actual installation direction of the ventilator. Allow construction to take place.

When described with reference to Figures 1 to 7 a preferred embodiment of the present invention made as described above. 1 is a view showing the configuration of a ventilation device according to an embodiment of the present invention. As illustrated in FIG. 1, an air supply flow path 104 through which outdoor air is supplied indoors and an exhaust path 106 through which indoor air is discharged are formed inside the main body 102 of the total heat exchanger 100. The air supply flow path 104 extends from the air supply inlet 116 to the air supply outlet 118 via the heat exchange element 112. The air supply flow path 104 includes an air supply fan 108 for forcibly blowing outdoor air into the room. Is installed. The exhaust passage 106 extends from the exhaust inlet 120 through the heat exchange element 112 to the exhaust outlet 122. The exhaust passage 106 includes an exhaust fan 110 for forcibly blowing indoor air to the outside. Is installed. The heat exchange element 112 is provided at the point where the air supply flow path 104 and the exhaust flow path 106 intersect.

The air supply flow passage 104 and the exhaust flow passage 106 are partitioned by partition walls 114 arranged up and down, and thus, the mutual flow between the air supply flowing through the air supply flow passage 104 and the exhaust flows through the exhaust flow passage 106. No interference In addition, since the air supply path and the exhaust path are formed separately in the heat exchange element 112, the air supply and the exhaust are not mixed with each other.

The air supply intake port 116 is for sucking outdoor air and communicates with the air supply flow path 104. The air supply outlet 118 is for discharging (supplying) the air sucked through the air supply inlet 116 and heat exchanged by the heat exchange element 112 to the room, and also communicates with the air supply passage 104. In addition, the exhaust intake port 120 is for inhaling indoor air and communicates with the exhaust flow path 106. The exhaust outlet 122 is used to exhaust the air sucked through the exhaust inlet 120 and heat exchanged by the heat exchange element 112 to the outside, and communicates with the exhaust flow path 106.

The air supply fan 108 is installed adjacent to the air supply outlet 118 on the indoor side of the air supply passage 104, and is driven by a motor (not shown). The exhaust fan 110 is installed adjacent to the exhaust outlet 122 on the outdoor side of the exhaust passage 106 and is driven by a motor (not shown). The heat exchange element 112 is in the shape of a rhombus, and each corner of the heat exchange element 112 is supported by the body 102 and the partition wall 114. The electrical component part 150 is installed in the side surface of the main body 102. The electrical component unit 150 is provided with electrical components such as a control unit (microcom), a power supply device, and a driving unit for controlling the overall operation of the heat exchanger 100.

FIG. 2 is a diagram illustrating an installation state of the ventilation device illustrated in FIG. 1. Heat exchanger 100 according to an embodiment of the present invention can be installed anywhere indoors and outdoors as needed. However, it is recommended to install indoors to avoid the effects of dust or moisture. In addition, it is preferable to install on a ceiling or the like so as not to occupy an indoor space. As shown in FIG. 2, the heat exchanger 100 is installed on the ceiling of the room, but the air supply outlet 118 and the exhaust inlet 120 communicate with the room, and the exhaust outlet 122 and the air supply inlet 116 ( 2 not shown) to communicate with the outdoors.

3 is a view showing a control system of the ventilation device shown in FIG. 1. As shown in FIG. 3, an input unit 304 and two temperature sensors 308 and 310 are connected to an input side of the controller 302 that controls the overall operation of the heat exchanger 100. A driver 312 is connected to the output side of the controller 302 so that the driver 312 can drive the two fans 108 and 110 and the display 314 shown in FIG.

The input unit 304 allows a user to input a desired operating condition of the heat exchanger 100. Two temperature sensors 308 and 310 are installed at each of the exhaust inlet 120 and the air inlet 116 shown in FIG. 1, and the temperature of the air flowing into the exhaust passage 106 of the heat exchanger 100 in the room. The temperature of the air flowing into the air supply flow path 104 of the total heat exchanger 100 is detected outdoors, and the detected temperature information is provided to the controller 302. The memory 316 stores software or data necessary for the controller 302 to control the overall operation of the heat exchanger 100.

The two fans 108 and 110 driven by the driver 312 correspond to the air supply fan 108 and the exhaust fan 110 mentioned in the description of FIG. 1. However, in an embodiment of the present invention, the functions of the air supply fan 108 and the exhaust fan 110 may be changed depending on the installation direction of the heat exchanger 100. The display 314 is for displaying an operation state of the heat exchanger 100 and various setting conditions. For example, it indicates whether the current operation mode is the electrothermal ventilation mode or the condensation prevention operation mode (cold region mode), an abnormal operation state of the heat exchanger 100 that requires user attention, or the current outdoor temperature. And room temperature, and the like. The display 314 may be mounted on the main body 102 of the heat exchanger 100, or may be installed in a user's actual activity space (for example, living room or bedroom) using wired / wireless communication.

In the following description, for convenience, the two fans 108 and 110 in which the use of the air supply and the exhaust are determined according to the installation direction of the heat exchanger 100 are divided into the first fan 110 and the second fan 108, respectively. In addition, the two temperature sensors 308 and 310 are also divided into a first temperature sensor 310 and a second temperature sensor 308, respectively. In addition, the temperature detected by the first temperature sensor 310 is divided into T1, and the temperature detected by the second temperature sensor 308 is divided into T2.

4 is a view showing a change in the air supply direction and the exhaust direction according to the installation direction of the ventilator shown in FIG. 1. In the description of each component of the total heat exchanger 100 according to an embodiment of the present invention shown in FIG. 1, a direction based on a flow direction of air such as 'air supply' and 'exhaust' is given to the air flow. The air supply direction and the exhaust direction of each component of the same total heat exchanger 100 depend on the installation direction of the total heat exchanger 100.

As shown in FIG. 4A, when the air supply inlet 116 and the exhaust outlet 122 communicate with the outdoors, and the air supply outlet 118 and the exhaust inlet 120 communicate with the interior, the heat exchanger 100 is installed, The supply and exhaust directions of the total heat exchanger 100 are the same as those mentioned in the description of FIG. 1. However, as shown in FIG. 4 (B), when the heat exchanger 100 is installed in the opposite direction to FIG. 4A and the positions of the first fan 110 and the second fan 108 are changed, the first fan 110. And the direction in which the blowing force of each of the second fans 108 change, the air supply direction and the exhaust direction of the heat exchanger 100 are also changed.

In the heat transfer ventilation mode, which is one of the operation modes of the heat exchanger, the air supply direction of the heat exchanger 100 is operated because the first fan 110 and the second fan 108 are operated continuously at the same time in order to supply and exhaust air at the same time. It is not necessary to consider the direction of exhaust and exhaust. However, in the cold region mode, which is an operation mode for preventing condensation, the air supply direction and the exhaust direction must be taken into consideration because the air flow in each of the air supply and exhaust operations or the air volume in each operation must be controlled separately.

The total heat exchanger 100 according to an embodiment of the present invention is an installation direction of the total heat exchanger 100 from a temperature detected by using the first temperature sensor 310 and the second temperature sensor 308 as shown in FIG. 4. And selectively operate the first fan 110 and the second fan 108 of the total heat exchanger 100 based on the determination of the installation direction to match the required air supply direction and the exhaust direction. Control the air supply and exhaust operation. If the heat exchanger 100 is installed as shown in Fig. 4A, the first fan 110 is used for exhaust and the second fan 108 is used for supplying air. In this case, the distinction between the air supply and the air supply is made through the comparison of the temperatures detected by the two temperature sensors 318 and 310 (T1≤0, T2> 0). However, when the heat exchanger 100 is installed as shown in FIG. 4 (B), since the installation direction of the heat exchanger 100 is opposite to FIG. 4 (A), the first fan 110 is used for supplying air and the second The fan 108 is used for exhaust. In this case, the distinction between the air supply and the air supply is made by comparing the temperatures detected by the two temperature sensors 318 and 310 (T1> 0, T2≤0). As a result, the heat exchanger 100 according to the exemplary embodiment of the present invention is always provided with normal air supply and exhaust regardless of the installed direction, so that the air supply and exhaust in the operation mode (for example, cold region mode) in which the air supply direction and the exhaust direction should be considered. Select and control correctly.

5 is a view showing a control method of a ventilation device according to an embodiment of the present invention. As shown in FIG. 5, the control unit 302 of the heat exchanger 100 receives a driving command corresponding to a desired driving mode input by the user through the input unit 304, and operates the driving mode corresponding to the received driving command. Before performing the operation, the first temperature T1 and the second temperature T2 are detected using the first temperature sensor 110 and the second temperature sensor 308 (502). When the first temperature and the second temperature are detected, the two temperatures are compared to select an operation mode based on the detected temperature (504).

If both the detected first temperature T1 and the second temperature T2 are the temperatures at which condensation is expected (for example, T1 ≦ 0 ° C. and T2 ≦ 0 ° C.), the controller 302 may determine the current first temperature and The display 314 indicates that the second temperature is not a normal use environment of the heat exchanger 100 to be recognized by the user, and the operation of the heat exchanger 100 is terminated (505). If both of the detected first temperature T1 and the second temperature T2 are 0 ° C or less, it means that both the outdoor temperature and the indoor temperature are 0 ° C or less. It is determined that the normal heat exchanger 100 is not a normal use environment and does not operate the heat exchanger 100. Conversely, if both the detected first temperature T1 and the second temperature T2 are temperatures at which condensation is not expected (for example, T1> 0 ° C. and T2> 0 ° C.), the controller 302 receives the received operation. The heat exchanger 100 is operated in the operation mode corresponding to the command (506). As an operation mode corresponding to the received operation command, for example, an electrothermal ventilation mode that does not need to distinguish between supply and exhaust may be used. In this electrothermal ventilation mode, both the first fan 110 and the second fan 108 are operated continuously.

If either of the detected first temperature T1 and second temperature T2 is the temperature at which condensation is expected (for example, T1 ≦ 0 ° C. or T2 ≦ 0 ° C.), air below 0 ° C. and 0 ° C. Condensation may occur in the total heat exchanger (100) due to the interaction of the air exceeded. Accordingly, the controller 302 may control the direction characteristics (air supply and air supply) of each of the first fan 110 and the second fan 108 to operate the heat exchanger 100 in an operation mode (for example, a cold region mode) to prevent condensation. Exhaust). To this end, the controller 302 compares the first temperature T1 and the second temperature T2 once again to determine which of the two temperatures is 0 ° C. or less (507).

When the detected first temperature T1 is 0 ° C. or less and the second temperature T2 is more than 0 ° C. (T1 ≦ 0 ° C. and T2> 0 ° C.), the total heat exchanger 100 is connected to FIG. 4A. Since they are installed together, the first fan 110 is set as the exhaust fan and the second fan 108 is set as the supply fan (508). In contrast, when the first temperature T1 is greater than 0 ° C. and the second temperature T2 is 0 ° C. or less (T1> 0 ° C. and T2 ≦ 0 ° C.), the total heat exchanger 100 is as shown in FIG. 4 (B). Since it is installed, the first fan 110 is set as the supply fan and the second fan 108 is set as the exhaust fan (510). As such, when the first fan 110 and the second fan 108 are set to have correct directional characteristics corresponding to the installation direction of the heat exchanger 100, the control unit 302 uses the cold region for preventing condensation based thereon. The heat exchanger 100 is operated in the mode (512). In the cold mode operation for preventing dew condensation, the controller 302 variably controls the operation time or the amount of air for each of the set exhaust fan and the air supply fan.

FIG. 6 is a diagram illustrating control of an exhaust fan and an air supply fan in a cold mode operation according to an exemplary embodiment of the present disclosure. Fig. 6A shows the variable control of the driving time, and Fig. 6B shows the variable control of the air volume.

As shown in Fig. 6A, in the cold mode based on the variable control of the fan operation time, the control unit 302 operates the air supply fan repeatedly and stops and the exhaust fan continuously operates. When the outdoor temperature T is −5 ° C. <T ≦ 0 ° C., the control unit 302 stops the air supply fan for 10 minutes after 80 minutes of operation, and the exhaust fan operates continuously. When the outdoor temperature T is lowered to −10 ° C. <T ≦ 5 ° C., the controller 302 stops the air supply fan for 10 minutes after 50 minutes of operation, and the exhaust fan operates continuously. If the outdoor temperature becomes lower than −10 ° C., the controller 302 stops the operation of the air supply fan and continuously operates only the exhaust fan.

As shown in Fig. 6B, in the cold mode based on the variable control of the air volume, the control unit 302 repeats the air supply fan with the intermediate air flow and the weak air flow and the exhaust fan operates with the strongest air flow. If the outdoor temperature T is −5 ° C. <T ≦ 0 ° C., the controller 302 operates the air supply fan at a medium air volume and the exhaust fan at a strong wind amount. When the outdoor temperature T is lowered to −10 ° C. <T ≦ 5 ° C., the control unit 302 operates the air supply fan at a weak air volume and the exhaust fan still operates at a strong wind amount. If the outdoor temperature becomes lower than −10 ° C., the control unit 302 stops the air supply fan and operates only the exhaust fan at a strong wind amount.

1 is a view showing the configuration of a ventilation device according to an embodiment of the present invention.

FIG. 2 is a view showing an installation state of the ventilation device shown in FIG. 1. FIG.

3 is a view showing a control system of the ventilation device shown in FIG. 1.

4 is a view showing changes in the air supply direction and the exhaust direction according to the installation direction of the ventilator shown in FIG. 1;

5 is a view showing a control method of a ventilation device according to an embodiment of the present invention.

FIG. 6 is a view illustrating control of an exhaust fan and an air supply fan in a cold mode operation according to an exemplary embodiment of the present invention. FIG.

* Description of the symbols for the main parts of the drawings *

100: heat exchanger

102: main body

104: supply air flow path

106: exhaust passage

108, 110: fan

112: heat exchange element

114: bulkhead

116: air supply intake

118: air supply outlet

120: exhaust inlet

122: exhaust outlet

150: battlefield

402, 404: temperature sensor

Claims (19)

In the control method of the ventilation apparatus including a 1st flow path and a 2nd flow path, Detecting a first temperature of air flowing into the first flow path and a second temperature of air flowing into the second flow path; The control method of the ventilation apparatus which distinguishes an air supply flow path and an exhaust flow path among the said 1st flow path and a said 2nd flow path based on the said 1st temperature and the said 2nd temperature. The method of claim 1, When the first temperature is a temperature at which cold mode operation is required, divide the first flow path into an air supply flow path; And controlling the second flow path into an air supply flow path when the second temperature is a temperature at which the cold mode operation is required. The method of claim 2, The control method of the ventilation apparatus of which the temperature which anticipates the dew condensation of the said ventilation apparatus is below -15 degreeC-0 degreeC. In the control method of the ventilation apparatus including a 1st flow path and a 2nd flow path, Detecting a first temperature of air flowing into the first flow path and a second temperature of air flowing into the second flow path; Determining whether cold mode operation is necessary based on the first temperature and the second temperature; If it is determined that the cold mode operation is necessary, the air supply flow path and the exhaust flow path are divided between the first flow path and the second flow path based on the first temperature and the second temperature; The control method of the ventilation apparatus which performs the said cold-cooled mode operation | operation through the said air supply flow path and the said exhaust flow path. The method of claim 4, wherein The cold mode operation is a condensation preventing operation of controlling the ratio of the air supply operation and the exhaust operation ratio of the ventilation device is a control method of the ventilation device. The method of claim 4, wherein And controlling the cold mode operation when any one of the first temperature and the second temperature is below 15 ° C-0 ° C. The method of claim 6, Dividing the first flow path into an air supply flow path when the first temperature is a temperature at which it is determined that the cold mode operation is necessary; The control method of the ventilation apparatus which divides a said 2nd flow path into an air supply flow path, when the said 2nd temperature is the temperature judged that the cold mode operation is needed. The method of claim 4, wherein Determining that both the first temperature and the second temperature are not a normal use environment of the ventilation device when the temperature determined to be the cold mode operation is necessary; And indicating that the first temperature and the second temperature are not a normal use environment of the ventilation device. And a second fan for allowing air to flow in the first flow path and a second fan for allowing air to flow in the second flow path, and a heat exchange element provided at an intersection point of the first flow path and the second flow path. In the control method, Detecting a first temperature of air flowing into the first flow path and a second temperature of air flowing into the second flow path; Determining whether condensation prevention operation of the ventilation device is necessary based on the first temperature and the second temperature; If it is determined that the dew condensation prevention operation is necessary, classifying the air supply fan and the exhaust fan among the first fan and the second fan based on the first temperature and the second temperature; And controlling the divided first and second fans to perform the anti-condensation operation. The method of claim 9, And the condensation preventing operation is a cold mode operation in which a ratio of an air supply operation and an exhaust operation ratio of the ventilation device is variably controlled. The method of claim 10, And controlling the cold mode operation when any one of the first temperature and the second temperature is below 15 ° C-0 ° C. The method of claim 10, Dividing the first flow path into an air supply flow path when the first temperature is a temperature at which it is determined that the cold mode operation is necessary; The control method of the ventilation apparatus which divides a said 2nd flow path into an air supply flow path, when the said 2nd temperature is the temperature judged that the cold mode operation is needed. The method of claim 10, Determining that both the first temperature and the second temperature are not a normal use environment of the ventilation device when the temperature at which it is determined that the cold mode operation is necessary is determined; And indicating that the first temperature and the second temperature are not a normal use environment of the ventilation device. A first flow path; A second flow path; A first temperature sensor for detecting a first temperature of air flowing into the first flow path; A second temperature sensor for detecting a second temperature of air flowing into the second flow path; And a controller configured to distinguish an air supply flow path and an exhaust flow path among the first flow path and the second flow path based on the first temperature and the second temperature. The method of claim 14, The first temperature sensor is provided in an upstream portion of the first flow path; And the second temperature sensor is installed upstream of the second flow path. A first flow path; A second flow path; A first temperature sensor for detecting a first temperature of air flowing into the first flow path; A second temperature sensor for detecting a second temperature of air flowing into the second flow path; It is determined whether the cold mode operation of the ventilator is necessary based on the first temperature and the second temperature. And a control unit which separates an air supply flow path and an exhaust flow path among the second flow paths, and performs the cold mode operation through the divided air supply flow paths and the exhaust flow paths. The method of claim 16, The first temperature sensor is provided in an upstream portion of the first flow path; And the second temperature sensor is installed upstream of the second flow path. A first fan to allow air to flow in the first flow path; A second fan allowing air to flow in the second flow path; A heat exchange element provided at an intersection point of the first flow path and the second flow path; A first temperature sensor detecting a first temperature of air flowing into the first flow path; A second temperature sensor detecting a second temperature of air flowing into the second flow path; It is determined whether cold mode operation is necessary based on the first temperature and the second temperature, and when it is determined that cold mode operation is necessary, the first fan and the second temperature are based on the first temperature and the second temperature. And a control unit configured to distinguish an air supply fan and an exhaust fan from among fans, and to control the divided first and second fans to perform the cold mode operation. The method of claim 18, The first temperature sensor is provided in an upstream portion of the first flow path; And the second temperature sensor is installed upstream of the second flow path.

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