KR101140712B1 - Transferring heat exchanger and method of controlling the same - Google Patents

Abstract

Disclosed are a total heat exchanger and a control method thereof. The heat exchanger and the control method thereof according to the present invention have an object of enabling the administrator to take fundamental measures against the damper position error by detecting a damper position error and generating an alarm. In addition, the total heat exchanger and the control method according to the present invention is to provide an emergency action for the damper position error of the total heat exchanger until a fundamental action by the manager after the alarm occurs due to a damper position error occurs. There is this. The total heat exchanger according to the present invention for this purpose includes an air supply device for sucking outdoor air into the room; An exhaust device for discharging indoor air to the outside; A heat exchanger provided between the air supply device and the exhaust device to perform heat exchange with air introduced into the room and air discharged to the outside; A damper for allowing the outdoor air sucked by the air supply device to enter the room through any one of a first flow path passing through the heat exchanger and a second flow path bypassing the heat exchanger; And a controller for determining whether a damper position error occurs by comparing whether the actual heat exchange efficiency and the predicted heat exchange efficiency in the current operation mode coincide with each other.

Description

Heat exchanger and its control method {TRANSFERRING HEAT EXCHANGER AND METHOD OF CONTROLLING THE SAME}

1 is a view showing a total heat exchanger according to an embodiment of the present invention.

FIG. 2 is a view showing an operating state in the heat transfer ventilation mode of the heat exchanger shown in FIG. 1; FIG.

3 is a view showing an operating state in the normal ventilation mode of the electrothermal exchanger shown in FIG.

4 is a view showing the structure of a damper driving device of the total heat exchanger shown in FIG.

FIG. 5 shows a control system of the total heat exchanger shown in FIG. 1. FIG.

6 is a view showing a control method of the total heat exchanger according to an embodiment of the present invention, a process for initializing the position of the damper by detecting a damper position error.

7 is a diagram illustrating a process of determining whether a damper position error detected in FIG. 6 is temporary or continuous.

8 is a view showing a first aid procedure for resolving a damper position error when it is determined that the damper position error is persistent in FIG.

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

10: case

11: air intake port

12 exhaust exhaust inlet

14: damper

15: exhaust duct (exhaust device)

15a: exhaust fan motor

15b: exhaust fan

20: heat exchanger

21: air supply outlet

22 exhaust exhaust port

25: air supply duct (air supply unit)

25a: Supply fan motor

25b: Air supply fan

102: damper drive device

104: load

202: Disc Cam

204a, 204b, 204c: first to third protrusions

206: Micro Switch

302: bypass flow path (second flow path)

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrothermal exchanger, and more particularly, to an electrothermal exchanger operating in an electrothermal ventilation mode or a normal ventilation mode by switching a flow path by controlling dampers.

The heat exchanger is responsible for the heat exchange of indoor and outdoor air through the heat exchanger to prevent the sudden introduction of cold or hot air from the outdoors to the interior when the indoor air is ventilated, or to prevent the heat from entering the outdoors. Device.

For this purpose, the total heat exchanger consists of an air supply unit, an exhaust unit, a heat exchanger, and a damper. The air supply device is composed of an air supply fan motor and an air supply fan, and the exhaust device is composed of an exhaust fan motor and an exhaust fan. The damper allows the air to be supplied / exhaust to pass through the heat exchanger (electrothermal ventilation mode) or bypass the heat exchanger (usually ventilation mode).

If a damper position error occurs and operates in the wrong operating mode, cold air enters the interior to reduce the indoor temperature in winter, or hot air enters the interior in summer to increase the temperature. It causes a significant drop in efficiency. In addition, the inflow of unnecessary outdoor air may cause the user's dissatisfaction because the indoor temperature does not reach the temperature set by the user (set).

Therefore, in order to operate the electrothermal ventilation mode and the normal ventilation mode correctly in the heat exchanger, the damper must be controlled so that the position (state) of the damper is accurately positioned at the position for the electrothermal ventilation mode or the normal ventilation mode.

The heat exchanger and the control method thereof according to the present invention have an object of enabling the administrator to take fundamental measures against the damper position error by detecting a damper position error and generating an alarm.

In addition, the total heat exchanger and the control method according to the present invention is to provide an emergency action for the damper position error of the total heat exchanger until a fundamental action by the manager after the alarm occurs due to a damper position error occurs. There is this.

The total heat exchanger according to the present invention for this purpose includes an air supply device for sucking outdoor air into the room; An exhaust device for discharging indoor air to the outside; A heat exchanger provided between the air supply device and the exhaust device to perform heat exchange with air introduced into the room and air discharged to the outside; A damper for allowing the outdoor air sucked by the air supply device to enter the room through any one of a first flow path passing through the heat exchanger and a second flow path bypassing the heat exchanger; The actual heat exchange efficiency in the current operation mode is obtained by considering the outside air temperature, the intake air temperature, and the air supply temperature of the total heat exchanger, and the predicted heat exchange efficiency in the current operation mode is obtained through the specification information of the heat exchanger. And a controller configured to determine that a position error of the damper occurs when actual heat exchange efficiency and the predicted heat exchange efficiency do not coincide with each other within a preset error range.

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In addition, when the position error of the damper occurs, the above-described control unit determines whether the position error of the damper is continuous, and generates a damper position error alarm when the position error of the damper is continuous.

The control unit may further include: controlling the position of the damper so that outdoor air sucked in when the operation mode set by the user is the total heat exchange mode is introduced into the room through the first flow path; When the operation mode set by the user is a normal ventilation mode, the position of the damper is controlled so that outdoor air sucked in is introduced into the room through the second flow path.

여기서, a는 외기 온도이고, b는 흡기 온도이며, c는 급기 온도이다.The controller may control the damper to sequentially move the damper to a position for each operation mode set by the user when the positional error of the damper is constant; The heat exchange efficiency at each operation mode is compared with each other, and the positional information of the dampers is reset according to the heat exchange efficiency at each operation mode.
In addition, the above-described control unit obtains the actual heat exchange efficiency using the following equation.

Here, a is the outside air temperature, b is the intake air temperature, and c is the air supply temperature.

The control method of the total heat exchanger according to the present invention for the above-described object, the air supply device for sucking outdoor air into the room, the exhaust device for discharging the indoor air to the outside, the air provided between the air supply device and the exhaust device is introduced into the room And a heat exchanger performing heat exchange with the air discharged to the outside, and the outdoor air sucked by the air supply device is introduced into the room through any one of a first flow passage through the heat exchanger and a second flow passage bypassing the heat exchanger. In the control method of the total heat exchanger including a damper, the actual heat exchange efficiency in the current operating mode is obtained in consideration of the outside air temperature, the intake temperature, and the air supply temperature of the total heat exchanger, and the specification information of the total heat exchanger Obtaining predicted heat exchange efficiency; Compare the actual heat exchange efficiency and the predicted heat exchange efficiency with each other within a preset error range; It is determined that a damper position error occurs when the actual heat exchange efficiency and the predicted heat exchange efficiency do not coincide with each other within a preset error range.

In addition, when the position error of the damper described above occurs, it is determined whether the position error of the damper is persistent; And generating a damper position error alarm when the damper position error is persistent.

In addition, the above-described control method of the total heat exchanger, the control method of the damper so that the outdoor air sucked when the operation mode set by the user is the total heat exchange mode flows into the room through the first flow path; The method further includes controlling the position of the damper so that outdoor air sucked in when the user-set operation mode is a normal ventilation mode is introduced into the room through the second flow path.

여기서, a는 외기 온도이고, b는 흡기 온도이며, c는 급기 온도이다.In addition, when the above-described position error of the damper is persistent control to move the damper to the position for each operation mode set by the user in sequence; The method may further include resetting the position information of the damper according to the heat exchange efficiency at the position for each operation mode by comparing the heat exchange efficiency at the position for each operation mode.
In addition, the above-described control unit obtains the actual heat exchange efficiency using the following equation.

Here, a is the outside air temperature, b is the intake air temperature, and c is the air supply temperature.

An embodiment of the present invention made as described above will be described with reference to FIGS. 1 to 8. First, Figure 1 is a view showing a total heat exchanger according to an embodiment of the present invention. As shown in Fig. 1, the electrothermal heat exchanger according to the embodiment of the present invention is provided with the air supply duct 25 as the air supply device and the air exhaust duct 15 as the exhaust device staggered inside the case 10 in a box shape. The heat exchanger 20 is provided. The air supply duct 25 directs outdoor air to the indoors, and the exhaust duct 15 directs indoor air to the outdoors. The heat exchanger 20 is provided at the intersection of the air supply duct 25 and the air exhaust duct 15 to allow heat exchange between the outdoor air to be supplied and the indoor air to be exhausted.

When the indoor air is discharged to the outdoors, the indoor air sucked through the exhaust inlet 12 is discharged to the outside through the exhaust outlet 22 of the exhaust duct 15.

On the contrary, in the case of supplying outdoor air indoors, the outdoor air sucked through the air supply intake port 11 passes through the heat exchanger 20 to the air supply outlet 21 of the air supply duct 25. To the room (electric heat ventilation mode) or to the room via a second flow path (bypass flow path) leading to the air supply outlet 21 of the air supply duct 25 bypassing the heat exchanger 20 without passing through (usually ventilation). mode). Whether or not the sucked outdoor air passes through or bypasses the heat exchanger 20 is determined by the open / closed state of the damper 14, which is opened and closed by a damper driven through the rod 104. By the driving force of the device 102. The opening and closing states of the damper 14 in the electrothermal ventilation mode and the normal ventilation mode are shown in FIGS. 2 and 3, respectively.

FIG. 2 is a view showing an operating state in the total heat exchange mode of the total heat exchanger shown in FIG. 1, and FIG. 3 is a view showing an operating state in the normal ventilation mode of the total heat exchanger shown in FIG. 2 and 3, the air supply duct 25 is provided with an air supply fan motor 25a and an air supply fan 25b, and the air supply fan 25b is rotated by the rotational force of the air supply fan motor 25a. Inhale outdoor air indoors. In addition, the exhaust duct 15 is provided with an exhaust fan motor 15a and an exhaust fan 15b. The exhaust fan 15b is rotated by the rotational force of the exhaust fan motor 15a to discharge the indoor air to the outside.

When the heat exchanger according to the embodiment of the present invention is set and operated in the electrothermal ventilation mode, the damper 14 is in a state as shown in FIG. 2, and the outdoor air sucked through the air supply inlet 11 is completely heated. It is to be supplied to the room through the air supply duct 25 via the exchanger (20).

On the contrary, when the total heat exchanger according to the embodiment of the present invention is operated in the normal ventilation mode, the damper 14 is in a state as shown in FIG. By allowing the air to be formed, the outdoor air sucked through the air supply inlet 11 completely bypasses the heat exchanger 20 and is supplied into the room through the air supply duct 25 through the bypass flow path 302.

4 is a view showing the structure of a damper driving device of the total heat exchanger shown in FIG. As shown in FIG. 4, the damper drive device 102 is provided so that the AC motor 200 can rotate, and a disc cam 202 is provided to rotate together with the AC motor 200. The disc cam 202 is connected with a rod 104 that operates as a driven joint. The rotational movement of the disc cam 202 is converted to linear movement in the rod 104 to move the damper 104 to the electrothermal ventilation position or the normal ventilation position.

In addition, three first to third protrusions 204a, 204b, and 204c are formed on the side surface of the disc cam 202. These three first to third protrusions 204a, 204b and 204c are for turning on the micro switch 206 which is installed to be adjacent to the disc cam 202, and the disc cam 202 is rotated so that the first to third protrusions 204a, 204b and 204c are rotated. When one of the third protrusions 204a, 204b, 204c reaches the position of the micro switch 206, the protrusion contacts the micro switch 206 or presses the micro switch 206 so that the micro switch 206 Turn on.

The first to third protrusions 204a, 204b, and 204c formed in the disc cam 202 have a close relationship with the position of the damper 14. In the total heat exchanger according to the embodiment of the present invention, one end of the rod 104 is linked to the damper 14, and the other end thereof is linked to the disc cam 202. The position at which the rod 104 is linked in the disc cam 202 is the same as the position at which the first protrusion 204a is formed. Therefore, when the disc cam 202 rotates clockwise and the first protrusion 204a reaches the position where the micro switch 206 is turned on, the damper 14 is moved by the linear motion of the rod 104. Move to the normal ventilation mode position. When the disc cam 202 further rotates clockwise to reach the position where the second protrusion 204b turns on the microswitch 206, the damper 14 is moved by the linear motion of the rod 104, as shown in FIG. Move to electrothermal ventilation mode position. That is, the position of the damper 14 when the 1st protrusion 204a and the 2nd protrusion 204b turn on the micro switch 206 becomes a normal ventilation mode position and an electrothermal ventilation mode position, respectively.

The third protrusion 204c is formed at an intermediate position between the first protrusion 204a and the second protrusion 204b. Thus, the position of the damper 14 when the third protrusion 204c turns on the micro switch 206 is usually an intermediate position between the ventilation mode position and the electrothermal ventilation mode position. The spacing of the first to third protrusions 204a, 204b, and 204c formed on the side of the disc cam 202 will be described in more detail as follows. When the position where the first protrusion 204 is formed in the disc cam 202 is set as the reference position, the distance between the first protrusion 204a and the third protrusion 204c or the third protrusion 204c and the second protrusion ( The spacing between 204b is smaller than the spacing between the first protrusion 204a and the second protrusion 204b. For example, in the case of FIG. 4, when the position where the first protrusion 204a is formed is 0 °, the second protrusion 204b is in the 180 ° position, and FIG. 3 protrusion 204c is in the middle of the 90 ° position. Are formed on each. Therefore, when the time required for the first cam 202 to rotate in the clockwise direction at a constant speed is 18 seconds, the second protrusion 204b is turned on from the time when the micro switch 206 is turned on by the first protrusion 204a. By the time the micro switch 206 is turned on, it takes 9 seconds, and when the micro switch 206 is turned on by the second protrusion 204b, the micro switch 206 is turned on by the third protrusion 204b. The turn-on time takes about half a second, 4.5 seconds, and the micro-switch 206 is turned on by the first protrusion 204b from the time when the micro-switch 206 is turned on by the third protrusion 204b. It takes 4.5 seconds to get to that point.

As such, the distance between the first to third protrusions 204a, 204b, and 204c is differently set according to the rotational direction of the disc cam 202, and the first to third protrusions 204a and 204b are provided with only one micro switch 206. And 204c) to distinguish the respective dampers 14 from each other. As such, each of the first to third protrusions 204a, 204b, and 204c is distinguished from each other by the first to third protrusions 204a, 204b, and 204c and one micro switch 206, and thus the position of the damper 14 is determined. The method of judgment will now be described in detail.

First, the disc cam 202 is rotated at constant speed until the micro switch 206 is turned on four times, and each turn-on time of the micro switch 206 is checked. If four turn-on times of the micro switch 202 are Ton1, Ton2, Ton3, and Ton4, respectively, the time interval between each turn-on time is T1 = Ton2-Ton1, T2 = Ton3-Ton2, T3 = Ton4-Ton3. Comparing these time intervals, the damper 14 at the first turn-on time of the four turn-on time points (Ton1, Ton2, Ton3, Ton4) of the micro switch 206 is shown in Table 1 below. It can be seen that the position of the position corresponding to the driving mode.

In Table 1, in the case of (a), the first protrusion 204a turns on the micro switch 206 for the first time, and in this case, the micro switch 206 is turned on in the order of 204a-204b-204c-204a. Thus, the time interval between each turn-on time becomes T1 > T2 > T3.

In the case of (b), the second protrusion 204b turns on the micro switch 206 for the first time. In this case, the micro switches 206 are turned on in the order of 204b-204c-204a-204b. The time interval between turn on time points is T1 < T2 &lt; T3.

In the case of (c), the third protrusion 204b turns on the micro switch 206 for the first time. In this case, the micro switches 206 are turned on in the order of 204c-204a-204b-204c. The time interval between turn-on times is T1 <T2> T3.

Eventually, the time interval between each turn-on time is obtained, and referring to Table 1, it is possible to know which protrusion is the first turn-on of the four turn-on of the micro switch 206, and the first protrusion is Since the subsequent protrusions can be distinguished from each other, the dampers 14 corresponding to each of the first to third protrusions 204a, 204b, and 204c may be distinguished through the division of the first to third protrusions 204a, 204b, and 204c. It is possible to determine the position of.

FIG. 5 is a diagram illustrating a control system of the total heat exchanger illustrated in FIG. 1. As illustrated in FIG. 5, an input unit 504, a micro switch 206, and a temperature sensor 506 are connected to an input side of the controller 502 that controls the overall operation of the heat exchanger. The input unit 504 is for setting an operation mode desired by the user. For example, the user selects the heat transfer ventilation mode / normal ventilation mode and the like through the input unit 504 and sets the air supply / exhaust / ventilation temperature. Can be. As described above, the micro switch 206 is turned on by the first to third protrusions 204a, 204b, and 204c to distinguish each of the first to third protrusions 204a, 204b, and 204c. The temperature sensor 506 is for detecting outside air temperature, intake air temperature, air supply temperature, and the like. The control unit 502 is provided with a memory 508, which is for storing user setting contents and various data generated in the process of controlling the heat exchanger. The memory 508 also stores information about the total heat exchanger specifications, such as the model / air volume / capacity of the total heat exchanger, and the control unit 502 calculates the estimated heat exchange efficiency of the operating heat exchanger in operation using the information (FIG. See description in 6).

The AC motor 200, the air supply fan motor 25a, and the exhaust fan motor 15a are connected to the output side of the controller 502. The AC motor 200, the air supply fan motor 25a, and the exhaust fan motor 15a are for driving the damper 914, the air supply fan 25b, and the exhaust fan 15b, respectively.

In the control method of the total heat exchanger according to an embodiment of the present invention, the damper position error is detected to control to take action. The detection of the damper position error compares the predicted heat exchange efficiency and the actual heat exchange efficiency for the operation mode set in the heat exchanger and detects the damper position error through the comparison result.

The current heat exchange efficiency of a total heat exchanger is basically calculated in the following manner.

(One)

In formula (1), a is the outside air temperature, b is the intake air temperature, and c is the air supply temperature. According to this equation, when in the normal ventilation mode, the air passing through the heat exchanger does not go through the heat exchanger 20 and thus no heat exchange occurs, so the outside air temperature and the air supply temperature are almost the same (a ≒ c). The exchange efficiency is virtually close to zero. However, when the heat transfer ventilation mode or the damper 14 is in the intermediate position, all or part of the air passing through the heat exchanger is subjected to heat exchange while passing through the heat exchanger 20. However, the heat exchange efficiency at this time may vary depending on the specification of the total heat exchanger, but at least shows a relatively higher heat exchange efficiency than in the normal ventilation mode.

When the heat exchange efficiency in the electrothermal ventilation mode is X, and the heat exchange efficiency when the damper 14 is in the intermediate position, Y, the estimated heat exchange efficiency according to the set operating mode and the actual damper position The difference in current heat exchange efficiency can be compared, and through this comparison, the positional error of the damper 14 can be determined as shown in Table 2 below.

Among the contents shown in Table 2 above, when comparing the predicted heat exchange efficiency with the actual heat exchange efficiency, the value of the actual heat exchange efficiency may change slightly due to external influences, and thus a slight margin in the actual heat exchange efficiency is taken into consideration. It is desirable to add (eg about 10%) to compare with the expected heat exchange efficiency.

As a result, the predicted heat exchange efficiency and actual heat exchange efficiency as shown in Table 2 are compared, and if the two values do not coincide with each other within the error range (ie, the margin), the position of the damper 14 corresponds to the set operation mode. It is judged that a damper position error occurred outside of.

FIG. 6 is a flowchart illustrating a method of controlling a total heat exchanger according to an exemplary embodiment of the present invention, and illustrates a process of initializing a position of a damper by detecting a damper position error. As illustrated in FIG. 6, when the electrothermal exchanger is powered on and starts operation, the user inputs desired operating conditions such as desired air supply / exhaust / ventilation temperature through the input unit 504 (602). The controller 502 calculates and stores the current heat exchange efficiency of the heat exchanger in the memory 508 while controlling the heat exchanger to operate according to the operation conditions such as the air supply / exhaust / ventilation temperature input by the user (604). At the same time, the control unit 502 obtains information on the total heat exchanger specifications such as the model / air volume / capacity of the total heat exchanger stored in the memory 508, and through this information, in the current operation mode of the total heat exchanger. The predicted heat exchange efficiency of is calculated and stored in memory 508 (608). The current heat exchange efficiency is calculated using Equation 1 described above.

If the current heat exchange efficiency and the estimated heat exchange efficiency calculated as described above do not match, it is determined that a damper position error has occurred (Yes of 610). On the contrary, if the current heat exchange efficiency and the expected heat exchange efficiency match, it is determined that the position of the damper 14 is normal (NO in 610). Here, the position error of the damper 14 means that the position of the damper 14 predicted by the controller 502 does not match the position of the actual damper 14. That is, the control unit 502 determines that the position of the damper 14 is in a specific position by the method described above in Table 1, but if the actual position of the damper 14 is different from the position determined by the control unit 502, the damper Admit that a location error occurred. If it is recognized that a damper position error has occurred (YES in 610), the memory 508 stores information about a driving mode currently set (612) and initializes the position of the damper 14 (614). The position of the damper 14 is initialized by securing the positional relationship between each of the protrusions 204a, 204b, and 204c and the corresponding damper 14 through the method shown in Table 1 above.

Even if a damper position error is detected and the damper position is initialized as shown in FIG. 6, it is necessary to confirm whether the damper position error is temporary due to external influence or persistent due to a fundamental problem inside the heat exchanger. If it is temporary, the problem can be solved by resetting the damper position, but if it is a constant problem due to the fundamental problem inside the heat exchanger, more specific measures must be taken to solve this problem.

FIG. 7 is a diagram illustrating a process of determining whether a damper position error detected in FIG. 6 is temporary or continuous. As shown in FIG. 7, it is determined whether the current operation mode of the heat exchanger is the electrothermal ventilation mode or the normal ventilation mode in the state where the damper position is initialized (702). Information on the currently set operation mode of the heat exchanger is determined based on the information stored in the memory 508 in block 612 of FIG. 6.

If the current operation mode is the electrothermal ventilation mode, the operation is performed for 5 minutes in the electrothermal ventilation mode and then for 2 minutes in the normal ventilation mode (704). At this time, the operation time may be set differently according to the situation, but it is preferable to shorten the operation time of the normal ventilation mode as much as possible. This is because the user may set the heat transfer ventilation mode to indicate that the current temperature and the like require the heat transfer ventilation mode. Therefore, if the electrothermal ventilation mode is required and the operation mode is set to the electrothermal ventilation mode and the normal ventilation mode is operated for a long time for the damper test, this may be contrary to the user's request and may cause user dissatisfaction. to be. For example, operating in the normal ventilation mode for the damper test in the winter when the heat exchange mode is set for heating, the outdoor cold air flows into the room and the indoor temperature decreases, which may cause user dissatisfaction. will be. Of course, despite the user's dissatisfaction, the operating time in normal ventilation mode can also be made long enough for a more accurate calculation of heat exchange efficiency.

On the contrary, if the current operation mode is the normal ventilation mode, the operation is performed for 5 minutes in the electrothermal ventilation mode and then for 5 minutes in the normal ventilation mode (706). When it is set to normal ventilation mode, the operation of both electric heating mode and normal ventilation mode for 5 minutes can be said to be for simple ventilation only because the difference between indoor temperature and outdoor temperature is not so large. This is because it is more preferable to measure the heat exchange efficiency more accurately by sufficiently lengthening the operation in the ventilation mode by 5 minutes. Of course, even in this case, the operation time of the electrothermal ventilation mode can be minimized so as not to cause any user complaints.

As such, the heat exchange efficiency of each of the electrothermal ventilation mode and the normal ventilation mode for testing is calculated and the respective values are stored in memory 508 (708). The control unit 502 calculates the current heat exchange efficiency in each operation mode stored in the memory 508 and the predicted heat exchange efficiency in the corresponding operation mode previously calculated in block 608 of FIG. 6 and stored in the memory 508. In comparison, the position error of the damper 14 is determined (710). If it is found through this process that the damper position error occurs again (Yes in 712), the damper position error is acknowledged as being caused by a fundamental problem inside the heat exchanger (714). No in 712) The damper position error detected in the process of FIG. 6 is recognized as temporary due to an external influence or the like and returns to the process of block 602 (716).

FIG. 8 is a view illustrating a first aid procedure for resolving a damper position error when it is determined that the damper position error is continuous in FIG. 7. As shown in FIG. 8, when it is determined that the damper position error is continuous, a damper position error alarm is generated and the administrator is notified that the damper position error of the heat exchanger is recognized and resolved through this alert. Take action to do so (802).

After the alarm, the disc cam 202 is gradually rotated to the position for each operation mode to temporarily solve the damper position error until the administrator's fundamental action is taken. That is, the disc cam 202 is rotated until the number of turn-on times of the micro switch 206 by the first to third protrusions 204a, 204b, and 204c reaches N times (for example, four or more times). While rotating the disc cam 202, the current heat exchange efficiency in each mode of operation is calculated and stored in the memory 508 (806).

When the number of turn-on times of the microswitch 206 reaches N times (YES in 808), the heat exchange efficiencies in each operation mode are compared 810, and through this comparison, the first to third protrusions 204a. The position information of the damper 14 corresponding to each of the first to third protrusions 204a, 204b, and 204c by confirming an actual operation mode for each turn-on time of the micro switch 206 by each of the first, second and second 204b and 204c. It is reset and stored in the memory 508 (812). The control unit 502 resets and stores the first to third protrusions 204a and 204b which are thus reset and stored in the memory 508 until the manager takes a fundamental measure against the damper position error of the heat exchanger by the damper position error alarm. 814c controls the position of the damper 14 based on the positional information of the damper 14 corresponding to each of them (814).

The heat exchanger and its control method according to the present invention detect the damper position error and generate an alarm so that the administrator can take fundamental measures against the damper position error.

In addition, the heat exchanger and the control method according to the present invention, the user's inconvenience by taking an emergency action for the damper position error of the heat exchanger until the damper position error occurs to generate an alarm and then take a fundamental action by the administrator Minimize

Claims (10)

An air supply device for sucking outdoor air into the room; An exhaust device for discharging indoor air to the outside; A heat exchanger provided between the air supply device and the exhaust device to exchange heat with air introduced into the room and air discharged to the outside; A damper for allowing the outdoor air sucked by the air supply device to enter the room through any one of a first flow path passing through the heat exchanger and a second flow path bypassing the heat exchanger; The actual heat exchange efficiency in the current operation mode is obtained by considering the outside air temperature, the intake air temperature, and the air supply temperature of the total heat exchanger, and the predicted heat exchange efficiency in the current operation mode is obtained through the specification information of the heat exchanger. And a controller configured to determine that a position error of the damper occurs when an actual heat exchange efficiency and the predicted heat exchange efficiency do not coincide with each other within a preset error range. The method of claim 1, wherein the control unit, Determining if the position error of the damper is continuous when the position error of the damper occurs, and generating a damper position error alarm when the position error of the damper is continuous. The method of claim 2, wherein the control unit, Controlling the position of the damper so that the suctioned outdoor air flows into the interior through the first flow path when the operation mode set by the user is the all heat exchange mode; And a heat exchanger for controlling the position of the damper so that the suctioned outdoor air flows into the room through the second flow path when the operation mode set by the user is a normal ventilation mode. The method of claim 3, wherein the control unit, When the position error of the damper is continuous, the damper is controlled to sequentially move to the position for each operation mode set by the user; And comparing the heat exchange efficiency at the position of each operation mode with each other and resetting position information of the damper according to the heat exchange efficiency at the position of each operation mode. An air supply device that sucks outdoor air into the room, an exhaust device that discharges indoor air to the outside, and is provided between the air supply device and the exhaust device to perform heat exchange with air introduced into the room and air discharged to the outside And a damper to allow the outdoor air sucked by the air supply device to enter the room through any one of a first flow path passing through the heat exchanger and a second flow path bypassing the heat exchanger. In the control method, Obtaining the actual heat exchange efficiency in the current operation mode by considering the outside air temperature, the intake temperature, and the air supply temperature of the total heat exchanger, and obtaining the predicted heat exchange efficiency in the current operation mode through the specification information of the heat exchanger; Compare the actual heat exchange efficiency and the predicted heat exchange efficiency with each other within a preset error range; And determining that the position error of the damper has occurred when the actual heat exchange efficiency and the predicted heat exchange efficiency do not coincide with each other within the preset error range. The method of claim 5, Determining whether the position error of the damper is continuous when a position error of the damper occurs; Generating a damper position error alarm when the position error of the damper is persistent. The method of claim 6, Controlling the position of the damper so that the suctioned outdoor air flows into the room through the first flow path when the operation mode set by the user is the all heat exchange mode; And controlling the position of the damper so that the suctioned outdoor air flows into the room through the second flow path when the operation mode set by the user is a normal ventilation mode. The method of claim 7, wherein When the position error of the damper is continuous, the damper is controlled to sequentially move to the position for each operation mode set by the user; And comparing the heat exchange efficiency at the position of each operation mode with each other and resetting the position information of the damper according to the heat exchange efficiency at the position of each operation mode. The method of claim 1, The control unit obtains the actual heat exchange efficiency using the following equation.

Here, a is the outside air temperature, b is the intake air temperature, and c is the air supply temperature. The method of claim 5, The control method of the total heat exchanger to obtain the actual heat exchange efficiency using the following equation.

Here, a is the outside air temperature, b is the intake air temperature, and c is the air supply temperature.

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