KR102050275B1 - Blast Apparatus - Google Patents

Abstract

The present invention provides an air blowing apparatus, which has an affordable price, and includes a silence means specialized in the removal of fan noise to effectively reduce the fan noise. The air blowing apparatus comprises: an air supply part having a housing, formed in a hollow structure, and enabling a discharge hole communicating with the outside to penetrate from one surface of the air supply part; an air supply fan having a plurality of blades in a radial shape, formed for the blades to be integrally rotated by a motor; and generating air flow for air to flow into the air supply part; and a silence means installed in the air supply part and eliminating sound waves progressing in the air supply part.

Description

Blower {Blast Apparatus}

The present invention relates to a blower for forcedly generating a flow of air to pressurize or transport the air. More particularly, the present invention relates to a blower including silence means for reducing noise generated in a blower fan.

The present invention relates to a blower including a blower fan, and includes a compressor, a fan, a blower and the like. The blower is mainly used for air conditioning facilities such as ventilation and cooling. The blower includes a fan to produce forced air flow. However, due to the blade (Blade) formed in the fan when the fan rotates the air pressure difference is generated. This causes high pressure air and low pressure air to hit the fan's internal structure, producing significant noise. In particular, the noise generated when the indoor air is exhausted to the outside is not a big problem because it is discharged to the outside, but the noise generated when supplying the indoor air to the room is a factor that degrades the indoor pleasant environment and needs to be removed. .

Meanwhile, an active noise control (ANC) will be described as one of methods for reducing noise. 1 schematically shows the configuration and operation principle of a general active noise controller 1. Referring to this, the general active noise controller (1) is based on the principle of canceling the interference caused by the sound waves (noise) that proceeds in the duct as a basic principle. That is, when the sound wave W ₁ is advanced by the noise source 2 in the duct, the sound wave W ₁ is input to the microphone 4, and the control unit 5 calculates the half wave W ₂ as the opposite waveform. Then, a half wave W ₂ is generated in the speaker 6. Here, the microphone 4a installed near the noise source 2 is for measuring the sound wave W ₁ , and the microphone 4b installed at the rear of the speaker measures feedback sound waves after the interference. As a result, the sound wave W ₁ and the half wave W ₂ are interfered with each other in a direction to cancel each other, and noise may be removed.

By the way, when the active noise controller is to reduce the noise generated in the blower, such noise is complicated and has a very sensitive characteristic over time, there is a limit to reduce it, in terms of using a microphone The disadvantage is the high cost. In addition, the blower is generally manufactured in a very compact volume to be installed in a narrow space such as a ceiling or a wall, there is a problem that a space for installing an active noise controller of the general form is not secured.

The present invention is to solve the problems of the prior art as described above, an object of the present invention is to provide a blower comprising a noise means that can reduce the fan noise.

More specifically, the cost of the noise means is low, characterized in that it provides a blower comprising a noise means for specialized in the fan noise removal to reduce the fan noise efficiently.

An embodiment of the present invention, to solve the problems as described above, the air supply unit is formed in a hollow structure and a hollow structure, the discharge port is in communication with the outside in one surface; A plurality of blades formed radially, the plurality of blades being integrally rotated by a motor so as to induce an air flow so that air flows into the air supply portion; And noise means installed in the air supply unit to cancel sound waves propagating in the air supply unit. It provides a blower comprising a.

In addition, the present invention is formed in the shape of a housing so that one surface is in contact with the air supply unit, the outdoor air hole communicating with the outdoor and the air supply hole communicating with the air supply is formed so that the outdoor air flows into the room, the outdoor air and the indoor A heat exchanger including an electrothermal exchange element provided to exchange heat by crossing air; Further, wherein the air supply fan is installed in the heat exchange unit, characterized in that arranged to flow the air from the heat exchange unit to the air supply unit through the outdoor air, the heat exchange element and the air supply hole. It is done.

The noise means may include an active controller for canceling the sound wave by generating a half wave opposite to the sound wave, wherein the active controller determines a frequency of the half wave by a control signal of the motor. .

In addition, the frequency of the half wave, characterized in that the value of the rotation speed of the air supply fan multiplied by the number of blades formed in the air supply fan.

In addition, the active controller, the frequency and delay time of the half-wave is input, the operation unit is provided to adjust the delay time; A first control unit which forms the half-wave generation signal by the signal input by the operation unit; An output unit configured to output the half wave according to the half wave generation signal of the first controller; Includes, the frequency of the half-wave, characterized in that it is provided to be adjustable based on the value multiplied by the rotational speed of the air supply fan and the number of blades formed in the air supply fan.

In addition, the operation unit, the amplitude of the half-wave is input, characterized in that the amplitude is provided to be adjustable.

In addition, the waveform of the half-wave is characterized in that it is determined by the degree that the current and power consumption of the motor changes with time.

In addition, the active controller, the sensing unit for measuring the current or power consumption of the motor; A second controller configured to calculate a frequency and a delay time of the half wave according to the change cycle of the current or the consumed current, and calculate the amplitude of the half wave according to the change amount of the current or the consumed current to form the half wave generation signal; And an output unit configured to output the half wave according to the half wave generation signal of the second control unit. Characterized in that it comprises a.

The active controller may include a feedback input unit configured to receive a synthesized wave of the sound wave and the half wave and transmit the received wave to the second control unit; The second control unit may further include feedback control by correcting the half-wave generation signal according to the waveform of the synthesized wave.

In addition, the active controller is characterized in that for generating the half-wave so that the traveling direction of the half-wave is the same direction as the direction through which the outdoor air passes through the discharge port.

The noise means may include a sound absorbing member installed to contact the inner wall of the air supply unit to absorb energy of sound waves traveling through the air supply hole, and the sound absorbing member may have a continuous pattern or a plurality of protrusions. It is disposed so as to protrude from the air supply portion.

In addition, the inner wall surface of the air supply unit is divided into a plurality of zones, the sound absorbing member is characterized in that the pattern is formed different for each of the plurality of zones.

In addition, the sound absorbing member is characterized in that the elastically deformable rubber material or porous synthetic resin material.

According to the problem solving means of the present invention as described above it can be expected a variety of effects including the following matters. However, the present invention is not achieved by exerting all of the following effects.

According to the present invention is provided with a noise means in the ventilating portion of the blower, to provide a structure that can reduce the fan noise even with an active controller. Furthermore, the present invention reduces the noise in the pure and low frequency region due to the cause frequency of the fan noise by the active controller, and by providing a double noise means to reduce the noise in the high frequency region by the sound absorbing member effectively eliminates the fan noise. Can be. Therefore, a comfortable indoor environment can be created.

In addition, since the active controller does not have a microphone and performs active noise control according to the control signal of the motor, the cost is reduced by 1/5 compared with the conventional active noise controller, which is very economical. Furthermore, there is an advantage that the user can operate the active controller individually by considering the use of the installation environment and the installation space of the blower by providing an operation unit so that the user can directly manipulate the waveform of the half wave.

In addition, since the active controller can control feedback using only one microphone, it is very economical compared to the conventional active noise controller using two microphones for feedback control.

Furthermore, the sound absorbing member has a different pattern is formed according to the zone to form a composite pattern as a whole, there is an effect that can effectively reduce the noise of the high frequency region band according to the location and installation environment of the specific noise source.

1 is a view showing the configuration and operation principle of a general active noise controller;
2 is a front view of the blower of the present invention;
Figure 3 is a side view of the air supply fan in Figure 2,
4 is a graph showing the amount of noise generated in the air supply fan,
5 is a longitudinal sectional view showing the inside of the air supply unit in FIG. 2;
6 is a schematic diagram of a first embodiment of an active noise controller in FIG. 5;
7 is a schematic diagram of a second embodiment of an active noise controller in FIG. 5;
8 is a perspective view of the sound absorbing member in FIG. 6.

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

2 is a front view of the blower of the present invention, FIG. 3 is a side view of the air supply fan in FIG. 2, FIG. 4 is a graph showing the magnitude of noise generated in the air supply fan, and FIG. 5 is an inner side of the air supply unit in FIG. 6 is a schematic diagram of a first embodiment of an active noise controller in FIG. 5, FIG. 7 is a schematic diagram of a second embodiment of an active noise controller in FIG. 5, and FIG. 8 is a perspective view of a sound absorbing member in FIG. 6.

The present invention is directed to a blower having an air supply space connected to the blower fan. However, for the sake of clarity, hereinafter, the electrothermal exchanger will be described as an example of a blower. The electrothermal heat exchanger described below includes an air supply fan 126 and an air supply unit 130 of the hollow 130a.

Referring to these drawings, the present invention is a heat exchanger (10) having a silencer in a portion where air is discharged into the room, hereinafter, the configuration and the noise means of the heat exchanger (10) will be described sequentially. do.

First, the configuration of the total heat exchanger 10 will be described with reference to FIG. 2. The total heat exchanger 10 of the present invention includes a body 100 having an enclosure shape. The body 100 serves as a flow path while being a housing for accommodating necessary parts. The front of the body 100 faces the interior space, the rear of the body 100 is installed in contact with the wall to communicate with the outdoors.

The body 100 includes a ventilation unit 110 through which indoor air is introduced, a heat exchange unit 120 through which heat is exchanged between indoor air and outdoor air, and an air supply unit 130 through which outdoor air is discharged to the room. The ventilation unit 110, the heat exchanger 120, and the air supply unit 130 are sequentially disposed along the longitudinal direction of the body 100, and the body 100 may be formed in the horizontal direction, but may be formed in the vertical direction. It is more advantageous in that the installation area is narrow. More preferably, the ventilation unit 110, the heat exchanger 120, and the air supply unit 130 may be sequentially disposed from the lower side in order to supply air to the outdoor air. Furthermore, the heat exchanger 120 is divided into a ventilation room 121, an exhaust room 122, an outside air room 123, and an air supply room 124, and the ventilation unit 110 is integrally formed with the ventilation room 121. The air supply unit 130 may be integrally formed with the air supply room 124.

Next, the ventilation unit 110, the heat exchanger 120, and the air supply unit 130 will be described in order.

The ventilator 110 is disposed below the body 100, and the filter net 111 is installed on the front and side surfaces thereof to prevent foreign substances from entering the interior of the heat exchanger 10. In addition, a plurality of pedestals 114 may be installed on the bottom surface. The ventilation unit 110 is in contact with the outside air chamber 123 and the ventilation room 121 of the heat exchange unit 120. An opening 112 is disposed between the ventilation unit 110 and the ventilation room 121, so that indoor air may enter the ventilation room 121 through the ventilation unit 110, and the ventilation unit 110 and the outside air chamber 123. ) Is closed 113 to prevent mixing of indoor and outdoor air.

The heat exchanger 120 is divided into a ventilation room 121, an exhaust room 122, an outside air room 123, and an air supply room 124. At this time, the ventilation room 121 and the exhaust room 122 are disposed at diagonal positions with each other, and the outside air chamber 123 and the air supply room 124 are also disposed at diagonal positions with each other. Furthermore, the total heat exchange element 400 is installed between the ventilation room 121 and the exhaust room 122, and between the outside air room 123 and the air supply room 124, that is, the central portion of the heat exchange unit 120.

The arrangement of the ventilation room 121, the exhaust room 122, the outdoor air room 123, the air supply room 124, and the heat exchange element 400 is partitioned by a plurality of partitions 127. Each room is separated by room partitions 127a, b, c and d, and an element rail for fixing and slidingly moving the heat exchange element 400 to an end of each room partition 127a, b, c, d. 127e). The room partition walls 127a, b, c, and d and the element rails 127e are formed across the inside of the body 100 to connect the front and rear surfaces of the body 100. The room partition wall 127a has a flat panel shape, and the element rail 127e is formed to partially cover the side edges of the heat exchange element 400 having a polygonal column shape so as to not only fix the position of the heat exchange element 400 but also insert and It guides the direction of movement during withdrawal.

As shown in the figure, the total heat exchange element 400 is formed in the shape of a hexagonal column and disposed so that two vertices facing each other on the bottom of the hexagonal shape are positioned at the top and bottom, respectively. The room partitions 127a, b, c, and d are disposed based on vertices of the total heat exchange element 400.

First, the room partition wall 127a that divides the outside air room 123 and the ventilation room 121 is installed in a shape extending downward from a vertex located at the lowermost end of the heat exchange element 400, thereby lowering the lower portion of the heat exchange unit 120. Partition vertically. In addition, the room partition wall 127b that divides the ventilation room 121 and the air supply room 124 is installed in a shape extending laterally from a vertex located at an upper side of the heat exchange element 400, thereby Partition one side horizontally. In addition, the room partition wall 127c that divides the air supply room 124 and the exhaust room 122 is installed in a shape extending upward from a vertex located at the top of the heat exchange element 400, thereby providing an upper portion of the heat exchange unit 120. Partition vertically. Finally, the room partition wall 127d that divides the exhaust room 122 and the outside air chamber 123 is installed in a shape extending laterally from a vertex located at the lower side of the heat exchange element 400, and the heat exchange part 120 The other side of the compartment is divided horizontally. Therefore, when the total heat exchange element 400 is inserted between the plurality of element rails 127e, each room is spatially separated and forms a flow path together with the total heat exchange element 400.

First, the ventilation room 121 is provided to communicate with the ventilation unit 110 as described above. In the ventilation room 121, a power supply 128 for supplying electricity to the heat exchanger 10 may be installed. The power supply unit 128 includes a power cord and various kinds of fans, dampers, and power lines of heat lines that may be installed in the heat exchanger 10, and may further include a bracket for arranging the power cords and power lines.

In addition, the exhaust chamber 122 is in communication with the outdoors by the exhaust hole 122a formed through the back of the body (100). Ventilation fan 125 may be installed in the exhaust chamber 122 to forcibly form an air flow through which indoor air may be exhausted, and may further include a damper and a motor for opening and closing the exhaust hole 122a. have.

In addition, the outside air room 123 is in communication with the outside by the outside air hole 123a formed through the back of the body (100). It is preferable that an outside air filter 129 is installed in the outside air 123 to filter the foreign matter contained in the outdoor air. The air filter 129 may be inserted and fixed by a rail (not shown) to be withdrawn from the front surface of the body 100, similarly to the heat exchange element 400. In addition, the air filter 129 is preferably formed as a plurality of filters including a prefilter for pretreatment, a medium filter for treating fine dust, and the like as a primary filter.

Moreover, the air supply room 124 communicates with the air supply part 130 by the air supply hole 124a formed through the upper surface. The air supply fan 126 may be installed in the air supply room 124 in order to forcibly form an air flow in which outdoor air may flow into the room, and further include a damper and a motor for opening and closing the air supply hole 124a. can do.

Next, the air supply unit 130 will be described. The air supply unit 130 is a housing structure of the hollow 130a disposed above the heat exchange unit 120, and the discharge hole 132 is provided on the front surface 131 of the air supply unit 130 so that outdoor air can be supplied to the room. Penetrating. The discharge holes 132 may be formed in plural and preferably formed in the center portion of the front surface 131. Further, the front surface 131 of the air supply unit 130 has inclined surfaces 131b formed at both sides such that the surface 131a formed at the center thereof protrudes from the surface formed at both sides thereof. The inclined surface 131b provides a structure in which air can be collected toward the discharge port. In addition, the air supply unit 130 is provided with a noise means for reducing the noise transmitted to the room through the discharge port 132. Noise means are described below. The present invention includes an air supply unit 130, it is possible to ensure a sufficient space for the installation space of the noise means and the noise can be removed.

Referring to the path of the indoor air and outdoor air when the ventilation using the present invention as follows. In this case, each path is represented by a solid line in FIG. 2 and a dotted line in the outdoor part.

Outdoor air is supplied indoors via the A-A 'path. Looking at the AA 'path, the outdoor air is introduced into the outside air chamber 123 through the outside air hole 123a, the heat exchange element 400, the air supply room 124, the air supply hole 124a, the air supply unit 130, It passes through the discharge port 132 sequentially and is supplied to the room.

Indoor air is vented to the outside via the B-B 'path. Looking at the BB 'path, the indoor air is introduced into the ventilation unit 110 through the filter network 111, the ventilation room 121, the heat exchange element 400, the exhaust chamber 122, the exhaust hole 122a It is discharged to the outdoors through.

Hereinafter, the noise means installed in the air supply unit 130 will be described. The noise means includes an active controller and a sound absorbing member 600. The active controller generates a half wave of the waveform opposite to the waveform constituting the fan noise by the control signal of the motor to remove the noise by offset interference, the sound absorbing member 600 is changed to the heat energy sound absorbing member 600 Noise is eliminated by allowing the

Referring to Figure 3 (a), the air supply fan 126 of the present invention includes a motor for driving. The center of the air supply fan 126 is the motor shaft 126a, and a plurality of vanes 126b are disposed radially with respect to the motor shaft 126a. When the motor is driven, air is sucked into the central portion of the air supply fan 126, discharged through the outlet 126c, and introduced into the air supply unit 130.

3 (b) shows visually where the fan noise occurs in the fan. As illustrated, when the air supply fan 126 is driven, a high air pressure is formed on the front surface of the wing 126b based on the rotational direction of the wing 126b, and a low air pressure is formed on the rear surface of the wing 126b. Therefore, a difference in density of the air is generated, and while the air having different densities is discharged to the outlet 126c, fan noise is generated while hitting the inner wall of the air supply fan 126 adjacent to the outlet 126c.

FIG. 4 is a graph illustrating a sound pressure level (SPL) measured for each frequency of noise constituting the fan noise. The sound pressure level is expressed in relative units (dBA) by applying a weighted filter for frequency to the loudness of the human ear. In particular, since the acoustic energy it will follow an exponential function, looking at the transformed graph to the index value, the first peak negative (Peak ₁₎ occurs at the frequency F _1, and the second peak negative (Peak ₂₎ twice the frequency F ₂ generation I can see that.

Here, the peak sound determines the main loudness and sound of the fan noise. As described above, since the fan noise is formed by the pressure difference formed before and after the blade 126b of the air supply fan 126, F ₁ is the number of the blades 126b of the air supply fan 126 and the rotation of the air supply fan 126. Cause frequency related to speed. In addition, F ₂ is twice the frequency of the cause frequency F ₁ , and has a smaller intensity than the first peak (Peak ₁ ). Although not shown on the graph, the peak sound gradually decreases for each frequency that is a multiple of the cause frequency F ₁ .

On the other hand, there is a noise having a wider frequency bandwidth and less energy than the peak sound in addition to the frequency forming the peak sound, which can be described as turbulent noise due to turbulence in the exhaust fan.

The present invention mainly cancels the peak noise of the cause frequency and the noise of the low frequency region by the active controller 500, and the noise of the high frequency region by the sound absorbing member 600. The active controller 500 is excellent in reducing noise in the low frequency range, but the resolution for processing high frequency is limited. In addition, in the case of the sound absorbing member 600, the noise in the low frequency range is long in the low frequency range, so a large space is required to confine the wavelength, and thus there is a limit in reducing the noise in the low frequency range. It is advantageous to reduce noise. The present invention can effectively remove noise in a wide frequency band by providing both the active controller 500 and the sound absorbing member 600.

Referring to FIG. 5, noise is greatly generated in the air supply holes 124a and P _{1 to} which the outlet 126c of the air supply fan 126 is connected, and the sound wave W ₁ proceeds. The active controller 500 generates a half wave W ₂ which may be combined with the sound wave W ₁ to cause a destructive interference. Therefore, the sound wave W ₁ and the half wave W ₂ are synthesized, and the attenuated synthesized wave W ′ progresses in the discharge holes 132 and P ₂ , thereby reducing noise.

The active controller 500 may be installed anywhere inside the heat exchanger 10, but may be installed on the rear surface 133 of the air supply unit 130 to provide a desired direction of half wave travel. More preferably, the active controller may be installed at the same distance as the discharge ports 132 provided in plurality.

Referring to FIG. 6 as a first embodiment of the active controller 500, the active controller 500 includes a first controller 510, an operation unit 520, and an output unit 530. The first embodiment uses a control signal of a motor related to the rotational speed of the air supply fan 126 and forms a half wave through open loop control.

The operation unit 520 allows the user to input the half wave by adjusting the frequency, delay time, amplitude, and transmits the input signal to the first control unit 510. The operation unit 520 may include an operation button 521 and a sign 522 that is an operation standard as an exemplary configuration for receiving an input. The user may operate the active controller together with the setting of the heat exchanger 10 in consideration of the installation space at the beginning of the heat exchanger 10 installation. During operation, after confirming that the noise is reduced by adjusting the frequency and delay time, the active controller can be effectively operated by adjusting the amplitude.

The first control unit 510 forms a half-wave generation signal by the signal input by the operation unit 520. The first controller 510 may arbitrarily calculate the frequency of the half wave using the rotational speed of the motor measured by the hall sensor or the set rotational speed according to the type of the motor. That is, multiplying the rotational speed of the motor by the number of the blades 126b of the air supply fan 126 allows the above-described cause frequency to be obtained, and thus, calculates the frequency as a reference for control. Therefore, the frequency range input through the operation unit 520 is preferably provided to be adjusted based on the frequency calculated by the first control unit 510. In addition, the delay time is related to the radius of the fan, and the delay time may be arbitrarily calculated through experiments using the same points in the structure of the air supply fan 126 and the heat exchanger 10. This may be a delay time that is a reference of the control, and therefore, the range of the delay time input through the operation unit 520 may be provided to be adjusted based on the delay time calculated by the first control unit 510. .

The output unit 530 outputs a half wave according to a half wave generation signal formed by the first controller 510 including a speaker. Therefore, the direction of the active controller described above becomes more precisely the direction of the output unit 530.

Referring to FIG. 7 as a second embodiment of the active controller 1500, the active controller 1500 includes a second controller 1510, a sensing unit 1520, an output unit 1530, and a feedback input unit 1540. . Parts not described below may be configured in the same manner as in the first embodiment. The second embodiment uses the control signal of the motor related to the current or power consumption flowing through the air supply fan 126 motor, and forms a half wave through close loop control.

The sensing unit 1520 measures the magnitude of the motor current or power consumption of the air supply fan 126 over time and transmits the magnitude to the controller.

The second controller 1510 calculates a half-wave waveform according to a change in current or power consumption of the motor measured by the sensing unit 1520, and transmits the waveform to the output unit. Since the rotational energy of the motor is converted into sound energy while forming noise, fan noise acts as a resistance element of the motor. Therefore, the second control unit 1510 uses the point that the current and power consumption of the motor change according to the configuration of the fan noise. Given that the rotational speed of the motor is kept constant, the louder the noise, the higher the current and the power consumption will be. Accordingly, the second controller 1510 may calculate the frequency of the half wave using the period in which the current and the power consumption increase by using the reverse. In addition, the delay time of the half wave may be calculated using the increase and decrease of the current and the power consumption, and the amplitude of the half wave may be calculated using the amount of change of the current and the power consumption per hour. In addition, the second controller 1510 may calculate the frequency, delay time, and amplitude of the half wave by comparing the current or power consumption value of the motor when the half wave is accurately formed.

The output unit 1530 outputs a half wave according to a half wave generation signal formed by the second controller 1510 including a speaker. Therefore, the direction of the active controller described above becomes more precisely the direction of the output unit 1530.

The feedback input unit 1540 is a configuration for feedback control of the second controller and may be provided selectively. The feedback input unit 1540 receives a synthesized wave of a sound wave W ₁ and a half wave W ₂ including a microphone. The feedback input unit 1540 is preferably installed between the front center of the air supply unit 130, that is, the discharge port 132 based on FIG. 5. The synthesized wave input by the feedback input unit 1540 may be received by the second controller 1510, and the half wave waveform may be subjected to feedback correction to calculate the wave. In this case, compared with the conventional two microphones (noise measurement and synthesized sound measurement), the present invention is much more economical because feedback control is possible using one microphone.

Furthermore, in the second embodiment, when the fan noise is reduced by the half wave, the current and the consumption current of the motor continuously change, and the sensing unit 1520 continuously measures the current or the power consumption of the motor, so that feedback control is possible. There is this.

Hereinafter, the sound absorbing member 600 will be described with reference to FIGS. 5 and 8. The sound absorbing member 600 is installed on the inner wall surface of the air supply unit 130 to absorb the energy of the sound waves traveling in the air supply hole 124a. The sound absorbing member 600 is preferably formed of an elastically deformable rubber material, and may be formed of a porous synthetic resin or the like. The sound absorbing member 600 of the present invention is disposed in such a way that a continuous pattern or a plurality of protrusions are formed to form a predetermined pattern and protrude from an inner wall of the air supply unit 130. Furthermore, the inner wall surface of the air supply unit 130 is divided into a plurality of zones (S ₁ to S ₁₁ ), the pattern of the sound absorbing member 600 may be formed differently depending on the position where the sound absorbing member 600 is installed. The plurality of zones shown in the drawing are partitioned by way of example, and are formed differently according to the shape of the air supply unit 130, the shape and location of the air supply hole 124a, the shape and location of the discharge port 132, the frequency configuration of the fan noise, and the like. Of course it can be.

8 shows the pattern of the sound absorbing member 600 in the zones S ₉ to S ₁₁ as an example. Each pattern may also be formed differently according to the shape of the air supply unit 130, the shape and location of the air supply hole 124a, the shape and location of the discharge port 132, the frequency configuration of the fan noise, and the pattern is formed at the boundary of the adjacent zone. It is also possible to be formed to change naturally.

That is, the present invention is characterized in that the pattern of the sound-absorbing member 600 is formed differently according to the zone, which is generally arranged to form a glass fiber in the same thickness, or to form a soundproof pad in an egg plate shape in a simple pattern Compared with the prior art. The present invention has the advantage that the sound absorption can be considered in consideration of the specific location of the noise source, unlike the prior art.

In this specification, each embodiment has been divided and described, but embodiments that can be derived by combining each embodiment also fall within the scope of the present invention.

The above description is merely illustrative of the technical spirit of the present invention, and those skilled in the art to which the present invention pertains various modifications and variations without departing from the essential characteristics of the present invention. The scope of protection should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

10: total heat exchanger 100: body
110: ventilator 111: sieve
114: pedestal 120: heat exchanger
121: ventilation room 122: exhaust room
122a: exhaust hole 123: outdoor room
123a: Outside hole 124: Air supply room
124a: air supply hole 125: ventilation fan
126: air supply fan 126a: motor shaft
126b: wing 126c: exit
127: bulkhead 127a, b, c, d: room bulkhead
127e: Element rail 128: Power supply
129: air filter 130: air supply unit
131: front 131b: slope
132 discharge port 400 heat exchange element
500, 1500: active controller 510: first control unit
520: operation unit 530, 1530: output unit
1510: second control unit 1520: sensing unit
1540: feedback input unit 600: sound absorbing member

Claims (13)

An air supply unit having an enclosure shape and a hollow structure, through which a discharge hole communicating with the outside is formed on one surface, and an air supply hole penetrating through the other surface not facing the one surface;
Electrothermal exchange is formed in the shape of the enclosure so that one surface is in contact with the outside of the air supply portion, the outdoor air hole is formed in communication with the outdoors so that the outdoor air flows into the room, and the outdoor air and the indoor air cross to exchange heat A heat exchanger including an element;
It is installed inside the heat exchange unit, a plurality of blades are formed radially, so that the plurality of wings are integrally rotated by a motor, the outdoor air is exchanged through the outside air hole, the total heat exchange element and the air supply hole An air supply fan arranged to flow air from the air supply unit into the air supply unit; And
A noise means installed in the air supply unit and canceling sound waves traveling in the air supply unit;
Including,
The noise means,
An active controller disposed on a surface of the air supply unit facing a surface on which the discharge hole is formed and disposed in a direction toward the discharge hole, and generating a half wave opposite to the sound wave to cancel the sound wave; And
A sound absorbing member installed to be in contact with the inner wall of the air supply unit to absorb energy of sound waves propagated in the air supply unit;
Including,
The frequency of the half wave is a value multiplied by the rotational speed of the air supply fan and the number of blades formed in the air supply fan as a reference value,
The active controller,
An operation unit provided to adjust the frequency, amplitude, and delay time of the half wave, and input the frequency, amplitude, and delay time of the half wave;
A first control unit which forms the half-wave generation signal by the signal input by the operation unit;
An output unit for outputting the half wave in accordance with the generated signal of the half wave of the first control unit;
Blower comprising a.
delete delete delete delete delete An air supply unit having an enclosure shape and a hollow structure, through which a discharge hole communicating with the outside is formed on one surface, and an air supply hole penetrating through the other surface not facing the one surface;
Electrothermal exchange is formed in the shape of the enclosure so that one surface is in contact with the outside of the air supply portion, the outdoor air hole is formed in communication with the outdoors so that the outdoor air flows into the room, and the outdoor air and the indoor air cross to exchange heat A heat exchanger including an element;
It is installed inside the heat exchange unit, a plurality of blades are formed radially, so that the plurality of wings are integrally rotated by a motor, the outdoor air is exchanged through the outside air hole, the total heat exchange element and the air supply hole An air supply fan arranged to flow air from the air supply unit into the air supply unit; And
A noise means installed in the air supply unit and canceling sound waves traveling in the air supply unit;
Including,
The noise means,
An active controller disposed on a surface of the air supply unit facing a surface on which the discharge hole is formed and disposed in a direction toward the discharge hole, and generating a half wave opposite to the sound wave to cancel the sound wave; And
A sound absorbing member installed to be in contact with the inner wall of the air supply unit to absorb energy of sound waves propagated in the air supply unit;
Including,
The active controller,
Sensing unit for measuring the current or power consumption of the motor;
A second controller configured to calculate a waveform of the half wave according to the change of the current or power consumption, and to calculate a frequency of the half wave according to a change cycle of the current or power consumption to form a generation signal of the half wave;
An output unit for outputting the half wave in accordance with the half wave generated signal of the second control unit; And
An operation unit configured to input the delay time of the half wave and to adjust the delay time;
Blowing apparatus comprising a.
delete The method of claim 7, wherein
The active controller,
A feedback input unit which receives the synthesized wave of the sound wave and the half wave and delivers the synthesized wave to the second controller;
More,
And the second control unit corrects the half-wave generation signal according to the waveform of the synthesized wave.
delete The method according to any one of claims 1, 7, and 9,
The sound absorbing member is a blower, characterized in that the continuous pattern or a plurality of projections are arranged to form a predetermined pattern to protrude from the air supply.
The method of claim 11,
The inner wall surface of the air supply portion is divided into a plurality of zones,
The sound absorbing member is a blower, characterized in that the pattern is formed different for each of the plurality of zones.
The method of claim 11,
The sound absorbing member is a blower, characterized in that the elastically deformable rubber or porous synthetic resin material.

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