KR100721458B1 - System and method for alarm filter change in waste heat recovery ventilating system - Google Patents

Abstract

According to the present invention, when the fan motor operates in the waste heat recovery type ventilation unit for more than the reference speed or more, the filter replacement time is displayed through a display and / or an alarm, so that the replacement time of the filter is easily missed. The invention is effective in solving problems such as deterioration of the air conditioner according to the reduction, deterioration of the filtering performance of the air filter, odor generation in the contaminated air filter.

Waste heat recovery type ventilation unit, filter, change time, alarm

Description

Filter replacement device for waste heat recovery type ventilation unit and method thereof {System and method for alarm filter change in waste heat recovery ventilating system}

1 is an exploded perspective view of a waste heat recovery type ventilation unit to which the present invention is applied;

2 (a) and 2 (b) is a plan view and a side view for explaining the flow of the exhaust gas of the waste heat recovery type ventilation unit shown in FIG.

3 is a block diagram of a filter replacement time notification device according to the present invention;

Figure 4 is a flow chart for explaining a filter exchange time notification method according to the present invention.

<Description of the symbols for the main parts of the drawings>

1-enclosure, 2a-air supply fan,

2b-exhaust fan, 3-controller,

4-heat exchange element, 5a, 5b-air supply duct (nozzle),

6a, 6b-Exhaust duct (nozzle) 7a, 7b-Intermediate plate,

8-air filter, 10-fan motor speed detection,

11-display, 12-alarm,

13-Power Section.

The present invention relates to a filter replacement time notification device and a method for notifying the filter replacement time of the waste heat recovery type ventilation unit in the waste heat recovery type ventilation unit. More specifically, the speed of the fan motor in operation determines the filter replacement time. The present invention relates to a filter replacement timing notification device and a method of the waste heat recovery type ventilation unit for displaying a filter change when it is determined that the condition is higher than a preset reference fan motor speed.

In modern people, many people spend 80-90% of their lives indoors, and the indoor environment has a great impact on the human body. Residents who spend long hours indoors due to pollution of the indoor environment often experience discomfort and symptoms such as headaches, coughs, and dizziness.Reducing the fresh air intake in order to save energy in buildings is a major cause of the deterioration of indoor air environment. It is becoming. Therefore, ventilation equipment for discharging harmful gases generated from various polluted particulate matters and building materials in the room is essential. Natural ventilation system uses a large amount of cooling or heating energy because it exhausts indoor air as it is when fresh air is supplied.

In order to solve this problem, the use of a waste heat recovery type ventilation unit that recovers and uses heat of indoor air discharged after air conditioning has been recently considered. Fresh air that is sucked from the outside through the air supply fan is removed through the pretreatment filter, passed through the heat exchange element, and then supplied to the room. On the other hand, the indoor air is exhausted out through the heat exchange element by the exhaust fan. The outside air and the ventilation inside the heat exchange element exchange heat with each other and supply heat to or recover heat from the air supply.

The existing waste heat recovery type ventilation unit has a pre-treatment filter in the air inlet area to prevent contaminants from entering the room. If the ventilation unit is used for a long time without cleaning or replacing the filter, the contaminants accumulate in the filter. It can no longer maintain the filter function, but rather degenerate into a space where fungi and bacteria live, and can be a source of pollutants upon inflow of outside air. In addition, the heat exchange film of the heat exchange element is contaminated with dust or the like, resulting in a decrease in heat exchange efficiency. Therefore, periodic cleaning and replacement of the filter is necessary.

However, if the user lacks sufficient prior knowledge of the ventilation system, the filter post-processing may be neglected. Also, the filter replacement cycle may be neglected by the user at random, or only based on the fan operation time. there was.

The present invention has been invented in view of the above-described circumstances, and the fan motor rotational speed at a constant pressure that requires a filter replacement for each of the air supply and exhaust air flows is set in advance, and the fan motor rotational speed during operation is fixed for a predetermined time or more. If the device rotates abnormally (consider that the static pressure rises temporarily in the case of the reverse wind blowing toward the fan), the filter change notification device of the waste heat recovery type ventilation unit that informs the user of the filter change and can determine the correct filter replacement time and its It is an object of the invention to provide a method.

Filter replacement time notification device of the waste heat recovery type ventilation unit according to the present invention for achieving the above object, the air supply or exhaust fan motor for supplying the outside air or discharge the indoor air to the outside; A fan motor rotation speed detection unit configured to detect a rotation speed of the fan motor; A storage unit for storing the rotational speed information of the fan motor relative to the air volume and accumulating and storing the fan motor driving time; A controller for controlling the driving of the fan motor and comparing the fan motor speed detection signal detected by the fan motor rotational speed detection unit with the filter replacement time reference information stored in the storage unit to determine a filter replacement time; And a display unit for displaying the filter replacement time according to the control of the controller.

In the above, the controller is further characterized in that the alarm unit for notifying the filter replacement time through the sound.

In addition, the filter replacement time notification method of the waste heat recovery type ventilation unit according to the present invention, the initialization step of storing the reference rotational speed of the fan motor and the reference drive time of the fan motor to the filter replacement time in the storage means of the controller; A measuring step of measuring the rotational speed of the fan motor by erasing the storage means for storing the reference time exceeding the rotational speed accumulated time when the power is turned on and the use is started; A rotation speed comparison step of comparing the measured rotation speed measured in the measurement step with a reference rotation speed stored in the storage means; When the measured rotation speed exceeds the reference rotation speed, the reference speed rotation speed duration comparison step for comparing the fan motor driving time and the reference time operated in a state exceeding the reference rotation speed; When the reference excess rotational speed duration is less than the reference time, when the reference excess rotational speed duration is less than the reference time, the reference rotational speed duration is accumulated, and then the flow returns to the step of measuring the rotational speed of the fan motor. Measuring the rotational speed of and comparing the reference rotational speed to continuously accumulate the reference rotational speed duration if the measured rotational speed is higher than the reference rotational speed; If the measured rotation speed of the fan motor falls below the reference rotation speed while the accumulated time does not exceed the reference time during the accumulation of the reference over rotation speed duration cumulative time, the accumulated reference rotation speed duration is deleted. If the cumulative time exceeds the reference time while the above operation is repeated, the method includes displaying a filter change through a display or an alarm.

In the above, the filter replacement display step compares the reference rotational speed of the fan motor and the reference driving time of the fan motor with the measured rotational speed of the fan motor and the duration of the reference excess rotational speed so as to predict the filter replacement time. It is characterized by.

 Hereinafter, the configuration and operation of the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 is an exploded perspective view of the waste heat recovery type ventilation unit to which the present invention is applied, Figure 2 (a) and (b) shows a plan view and side view of the waste heat recovery type ventilation unit shown in FIG.

In the drawings, reference numeral 1 denotes an enclosure, 2a an air supply fan, 2b an exhaust fan, 3 an controller, 4 an heat exchange element, 5a and 5b an air supply duct (nozzle), 6a and 6b an exhaust duct (nozzle), 7a, 7b represents an intermediate plate, and 8 represents an air filter, respectively.

As shown in the accompanying drawings, in the housing 1 of the waste heat recovery type ventilation unit, a heat exchange element 4 for exchanging heat with the supplied outdoor air and the exhausted indoor air is installed, and on one side wall of the enclosure 1 The air supply duct 5a on the inlet side, which is a passage through which air is moved indoors, the air supply duct 5b on the supply side, and the exhaust duct 6a on the inlet side, which is a passage through which indoor air is moved outdoors, and the exhaust duct on the outlet side ( 6b) are provided respectively.

In addition, inside the enclosure 1, compartments separated from each other by the intermediate plates 7a and 7b in horizontal directions on both sides of the heat exchange element 4 are installed in the vertical direction.

An air supply fan 2a for forcibly sucking outdoor air is provided in the air supply duct 5b of the outdoor air supply port side, and an exhaust fan 2b is provided in an exhaust duct 6b of the outlet port for forcibly discharging indoor air to the outside. The air supply fan 2a and the exhaust fan 2b communicate with the lower portion of the intermediate plate 6a and 6b, respectively, to suck air introduced into the lower portion through the heat exchange element 4, and discharge the air indoors or outdoors. It works.

In addition, in the housing 1, an air filter 8 is installed in front of the air inlet of the heat exchange element 4, so that air flowing in from the outside passes through the heat exchange element 4 in the air filter 8; By filtering the pollutants, the contaminants are prevented from entering.

In FIG. 2, the parts indicated by solid lines indicate the air supply flow directions, for example, and the parts indicated by the dashed lines indicate the exhaust flow directions, respectively.

According to the configuration as described above, the waste heat recovery type ventilation unit is heat-exchanged while passing through the heat exchange element 4 when the fresh air of the outdoor is sucked through the air supply duct 5a by the operation of the air supply fan 2a, and then the air supply duct 5b. ) Is supplied to the room through the exhaust air, and the indoor polluted air is sucked through the exhaust duct (6a) by the operation of the exhaust fan (2b) and heat-exchanged while passing through the heat exchange element (4), and then to the outside through the exhaust duct (6b) It is made to be discharged.

3 is a block diagram of a filter replacement time notification device according to the present invention.

Supply / exhaust fans (2a, 2b) are connected to the controller (3) for controlling the overall operation of the waste heat recovery type ventilation unit to drive the supply / exhaust fan (2a) (2b) based on the drive signal of the controller (3). The fan motor rotational speed detection unit 10 for sensing the rotational speed of the supply / exhaust fans 2a and 2b is also connected to be controlled.

The controller 3 is a reference information for determining the replacement time of the filter 8, the rotation speed information of the fan motor relative to the air flow rate and for changing the filter when the fan motor is driven for a predetermined time or more above the rotation speed The reference time information is stored in the storage unit 3a provided inside. Of course, the reference information may be stored using a separate storage means installed outside the controller (3).

In addition, the controller 3 is provided with a display unit 11 and an alarm unit 12 to inform the user of the filter replacement time. The display unit 11 and the alarm unit 12 are not limited to the specific type because any means that can effectively inform the user of the filter replacement time is available. For example, when the digital display device is applied, the display unit 11 may display the filter replacement time in the form of a message. When the lighting unit such as the light emitting diode is applied, the display unit 11 may display the color using a color or a flashing cycle.

The power supply unit 13 functions to convert commercial power into a required voltage level among components constituting the waste heat recovery type ventilation unit that require power supply.

According to such a configuration, when the controller 3 determines that the fan motor rotational speed detected by the action of the fan motor rotational speed sensing unit 10 is higher than or equal to the reference speed stored in the storage means, the supply / exhaust fan 2a and 2b Cumulative time is determined, and when the cumulative time is more than the reference time, it is determined that the filter replacement time has been reached and the filter replacement time is reached through the display unit 11 and / or the alarm unit 12. Inform.

4 is a flowchart illustrating a method of notifying filter replacement time according to the present invention.

First, when the waste heat recovery type ventilation unit is manufactured, as a reference information for determining whether the filter replacement time has been reached, the filter replacement is performed when the fan motor is driven for a predetermined time by the fan motor's reference rotation speed and the rotation speed or more. The reference time for displaying is stored in the storage means. When the fan motor is driven at the reference rotational speed or less, the fan motor reference excess rotational speed accumulated in the storage unit 3a, which is a storage means included in the controller 3, is erased and initialized.

When the waste heat recovery type ventilation unit is installed and started to use, the controller 3 periodically performs a step of measuring the rotational speed of the supply / exhaust fans 2a and 2b.

The controller 3 then compares the measured rotational speed measured in the measuring step with a reference rotational speed stored in the storage unit 3a and performs a rotational speed comparison step of determining whether the measured rotational speed exceeds the reference rotational speed. .

Then, when the measured rotational speed is greater than or equal to the reference rotational speed in the rotational speed comparison step, the cumulative time is compared by accumulating and storing the accumulated time that is continuously rotated at the rotational speed exceeding the reference rotational speed and the reference time set correspondingly. A reference speed rotation speed duration comparison step for determining whether the reference time is exceeded is performed.
If the cumulative time is less than the reference time in the comparison result in the comparison of the reference rotational speed duration, it is determined that the filter replacement time has not yet occurred, and the rotational speed measurement step, the rotational speed comparison step and the reference rotational speed duration comparison step are performed. The repetition is performed to accumulate the time at which the reference rotational speed continues while the reference rotational speed continues.
If the measured rotation speed falls below the reference rotation speed while the accumulated reference rotation speed duration does not exceed the reference time in the process of accumulating the reference rotation speed duration as described above, the accumulated time is erased. Repeat the above operation.

Then, if it is determined that the duration of the reference excess rotational speed of the supply / exhaust fans 2a and 2b is equal to or greater than the preset reference time, the controller 3 turns the display unit 11 and / or the alarm unit 12 into account. The filter change is displayed.

In the above step, the method for displaying the filter replacement when the filter replacement time is reached by comparing the measurement signal with the reference signal has been described. However, even when the filter replacement time is not reached, information for predicting the filter replacement time may be displayed. . For example, by comparing the measured signal with the reference signal and displaying the result as a number in the form of a number or graphic, the user can predict the filter replacement time and prepare for the filter replacement in advance.

delete

As described above, according to the present invention, the filter replacement time is notified to the user in advance by using an audiovisual method. There is an effect that can solve the problems such as the occurrence of odor in the contaminated air filter.

Claims (4)

A fan motor for supplying or exhausting air to supply outside air or exhausting indoor air to the outside; A fan motor rotation speed detection unit configured to detect a rotation speed of the fan motor; A storage unit for storing the rotational speed information of the fan motor relative to the air volume and accumulating and storing the driving speed exceeding the fan motor reference speed; A controller for controlling the driving of the fan motor and comparing the fan motor speed detection signal detected by the fan motor rotational speed detection unit with the filter replacement time reference information stored in the storage unit to determine a filter replacement time; Filter replacement time notification device of the waste heat recovery type ventilation unit comprising a display unit for displaying the filter replacement time in accordance with the control of the controller. The apparatus of claim 1, wherein the controller further comprises an alarm unit for notifying the filter replacement time through sound. An initialization step of storing the reference rotational speed of the fan motor and the reference driving time of the fan motor with respect to the filter replacement time in a storage means of the controller; A measuring step of measuring the rotational speed of the fan motor by erasing the storage means for storing the reference time exceeding the rotational speed accumulated time when the power is turned on and the use is started; A rotation speed comparison step of comparing the measured rotation speed measured in the measurement step with a reference rotation speed stored in the storage means; When the measured rotation speed exceeds the reference rotation speed, the reference speed rotation speed duration comparison step for comparing the fan motor driving time and the reference time operated in a state exceeding the reference rotation speed; When the reference excess rotational speed duration is less than the reference time, when the reference excess rotational speed duration is less than the reference time, the reference rotational speed duration is accumulated, and then the flow returns to the step of measuring the rotational speed of the fan motor. Measuring the rotational speed of and comparing the reference rotational speed to continuously accumulate the reference rotational speed duration if the measured rotational speed is higher than the reference rotational speed; If the measured rotation speed of the fan motor falls below the reference rotation speed while the accumulated time does not exceed the reference time during the accumulation of the reference over rotation speed duration cumulative time, the accumulated reference rotation speed duration is deleted. Then, starting from the first step of measuring the rotational speed of the fan motor, accumulate the time when the fan motor rotates beyond the reference speed, and when the accumulated time exceeds the reference time, the filter change is indicated by a display or alarm. How to notify the filter replacement time of the waste heat recovery type ventilation unit comprising a step. The filter replacement display step according to claim 3, wherein the filter replacement display step compares and displays the reference rotational speed of the fan motor with the reference rotational speed duration of the fan motor and the measured rotational speed of the fan motor and the accumulated reference rotational speed duration. Filter replacement time notification method of the waste heat recovery type ventilation unit, characterized in that for displaying to predict.

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