JP4479182B2 - Supply and exhaust fan - Google Patents

Description

  The present invention relates to a supply / exhaust ventilation fan that performs exhaust of indoor polluted air to the outside of the room and supply air for taking in the outdoor air into the room.

  In a conventional supply / exhaust ventilation fan, a multi-blade type blade is mounted on the rotating shaft of a single motor of both shafts type, and each blade is covered with a fan casing to constitute an exhaust fan and an air supply fan. The exhaust blower and the air supply blower are operated simultaneously, and the ventilation operation by simultaneous supply and exhaust is performed. In some of these, the exhaust flow and the supply air flow are passed through a heat exchanger, and heat exchange is continuously performed between the supply and exhaust flows. In addition, regarding this type of prior art, there is a technique disclosed in Patent Document 1.

JP 05-033979 A

  In a conventional supply / exhaust ventilation fan, since each blade of the exhaust blower and the supply blower is rotated simultaneously by a single motor, it is necessary to select a motor having a capacity suitable for it. Rotating the blades of the exhaust air blower and the air supply blower with individual motors can be inexpensive for each motor, and as a result, the life of each motor can be extended. In addition, in a double-shaft motor, the exhaust part on the exhaust side has a positive pressure, the suction part on the supply side has a negative pressure, and the motor straddles between them. Airtightness is difficult to maintain, and the structure for airtightness is troublesome. In the partition structure that separates the supply air and the exhaust gas, if the heat exchange is not performed, if the temperature difference between the supply and exhaust air flows is large, it is necessary to adopt a heat insulating structure for condensation, and the structure becomes complicated. Moreover, in a highly airtight house, it is installed for the purpose of discharging harmful chemical substances and is always ventilated. However, conventional air supply and exhaust fans have high noise and power consumption, and the main body itself is large.

  The present invention has been made to solve such conventional problems, and the object of the present invention is to promote the reduction of the manufacturing cost by simplifying the structure of the supply / exhaust ventilation fan. It is to obtain an air supply / exhaust ventilation fan suitable for low-noise, power-saving, and continuous ventilation, and to improve the usability and function of the air supply / exhaust ventilation fan.

An air supply / exhaust ventilation fan according to the present invention for achieving the above object is provided with an exhaust outlet provided on the back of a main body connected to one partitioned duct and communicated with one of the partitioned spaces of the duct, An exhaust space having an exhaust blower for exhausting indoor air driven and sucked by one drive motor to one space via an exhaust outlet, and an exhaust blower communicating with the other space partitioned by the duct and air supply inlet port adjacent to the outlet, with partitioned and the exhaust space by a partition wall, viewed from the front body air of the second driven by the driving motor the other space via the air supply inlet horizontal An air supply space portion having an air supply blower that sucks in the direction and supplies air into the room, a main body box having an exhaust space portion, an air supply space portion, and a partition wall and attached to the wall surface of the room, an air supply intake port, Air intake of air supply blower It is inserted and removed from the front surface of the main box body between, characterized by comprising an air filter for filtering air drawn into the air supply fan.

  By adopting the above means, the exhaust space portion and the air supply space portion can ensure airtightness and heat insulation by the structure of the main body box body without providing any special structural member. The exhaust can be performed by a low noise exhaust blower with low static pressure and low power consumption suitable for a large air volume, and the air supply can be performed by a medium static pressure and medium air flow with low power consumption. Can do. For installation, it is connected to a double-layer pipe ventilation duct with a cylindrical shape and a partition in the center so that it can be easily communicated outside.

  This air supply / exhaust ventilation fan is constructed by incorporating functional parts into a main body box made of an integral molded product of resin having an independent exhaust space portion and an air supply space portion separated from each other by a central partition wall. ing. The front surface of the main body box is open, and a front grille made of resin having a rear structure that is individually connected to the exhaust space portion and the air supply space portion is mounted on the front surface of the main body box body.

  The back surface of the main body box is closed by a back structure. In the center of the back structure, a round hole divided into left and right by a partition is opened. One of the round holes communicates with the air supply space and functions as a suction inlet for air supply, and the other of the round holes communicates with the exhaust space and functions as an exhaust outlet for exhaust. A square air supply outlet and a rectangular exhaust inlet are provided side by side at an upper front portion of the front grill so as to be spaced apart from the partition wall. This prevents a short circuit between the supply / exhaust flow as well as the direction of the airflow. An axial flow or mixed flow exhaust blower is incorporated in the exhaust space, and a multi-blade supply blower is incorporated in the supply space.

  The exhaust space portion and the air supply space portion are separated by a partition, and airtightness and heat insulation can be secured by the structure of the main body box body without providing a special structural member. Exhaust can be performed by a low noise exhaust fan with low static pressure and low power consumption suitable for large air volume, and air supply can be performed by an air supply fan with medium static pressure and low power consumption . For installation, it can be easily connected to the outside by connecting to a single double-layer pipe ventilation duct with a cylindrical shape and a partition in the center.

Embodiment 1 FIG.
1 is an exploded perspective view of a supply / exhaust ventilation fan according to the present embodiment, FIG. 2 is a partially exploded perspective view of the same, FIG. 3 is a longitudinal front view, and FIG. 4 is a longitudinal side view of the exhaust space portion side shown in an attached state. 5 is a longitudinal sectional side view of the air supply space shown in the state before installation, and FIG. 6 is a perspective view showing the entire supply / exhaust ventilation fan. In this air supply / exhaust ventilation fan, functional parts are incorporated in a main body box 4 made of an integrally molded resin having an independent exhaust space portion 2 and an air supply space portion 3 that are partitioned from each other by a central partition wall 1. (See FIG. 3). The front surface of the main body box 4 is open, and the front grille 5 made of resin having a rear structure that is individually connected to the exhaust space portion 2 and the air supply space portion 3 can be attached to and detached from the front surface of the main body box body 4. It is installed.

  The back surface of the main body box 4 is closed by a back structure 6. In the center of the back structure 6, a round hole divided into right and left by the partition wall 1 is formed. One of the round holes communicates with the air supply space 3 and functions as an intake port 7 for supply of air, and the other of the round holes communicates with the exhaust space 2 and functions as an exhaust outlet 8 for exhaust. A drainage trough 9 is extended to the outside at a lower end of the intake port 7 for supplying air. A rectangular air supply outlet 10 and a rectangular exhaust inlet 11 are provided side by side at a front upper portion of the front grill 5 so as to be separated from the partition wall 1. This prevents a short circuit between the supply / exhaust flow as well as the direction of the airflow. An axial flow type exhaust blower 12 is incorporated in the exhaust space portion 2, and a multi-blade air supply blower 13 is incorporated in the air supply space portion 3.

In the exhaust blower 12 and the supply blower 13, the rotation shafts of the drive motors 14 and 15, which are the first drive motor and the second drive motor, are provided horizontally on substantially the same line. 16 and a multiblade blade 17 are mounted. The axial flow blade 16 of the exhaust blower 12 is located on the suction side, and the drive motor 14 is located on the outlet side. The exhaust fan 12 is provided with a fan casing 18 that covers the axial flow blades 16 and the drive motor 14. The fan casing 18 has a cylindrical structure 19 that covers the outer periphery of the axial flow vane 16 to its rear edge, and a blowout guide that is connected to the cylindrical structure 19 and covers the outer shell of the drive motor 14 and is directed to the outlet 8 in the radial direction. And a cover structure 21 having 20. The cylindrical structure 19 is fitted and attached to the end of the cover structure 21 attached to the partition wall 1 so as to be detachable by an axial operation. The lowermost end surface of the blowout guide 20 is substantially in the same position as the lower end surface of the blowout port 8. Further, a bell mouth 22 having an inner diameter of about 50 to 70% of the outer diameter of the axial flow vane 16 is formed at one end of the cylindrical structure 19 in the fan casing 18 and serves as a suction port of the exhaust blower 12. An arcuate suction guide 23 is provided on the surface of the main body box 4 facing the suction port of the exhaust blower 12 so as to smoothly guide the airflow into the suction port. The drive motor 14 of the exhaust blower 12 can be operated by switching notches by operating a switch, and can be operated / stopped by operating a power switch 24 provided on the lower left surface.

  The drive motor 15 of the air supply blower 13 is disposed on the back side of the motor fixing plate 25 provided in the air supply space 3 by integral molding, that is, in a portion not located in the air supply air passage, and its outer shell is disposed in the main body box. It is attached to the body 4 by screwing. The driving motor 15 of the air supply blower 13 can also be operated by notch switching, and only the air supply blower 13 can be operated / stopped by operating the air supply switch 26 provided alongside the power switch 24. . The multiblade blade 17 mounted on the rotation shaft of the drive motor 15 is housed in a fan casing 27 made of foamed polystyrene. The lowermost end surface of the fan casing 27 of the air supply blower 13 is substantially in the same position as the lower end surface of the air supply inlet 7 provided on the back surface of the main body box 4.

  A frame element forming a part of a holder 30 for mounting the air filter 28 is formed on the suction port surface of one end of the fan casing 27, and a sound absorbing material 29 is pasted on the inner surface of the air outlet portion. Another frame element is coupled to this frame element to form a square holder 30 that fits tightly in a space portion facing the partition wall 1 of the air supply space 3. The holder 30 can be inserted into and removed from the front side of the filter mounting port 31 that is vertically long on the front surface of the main body box 4, and the air sucked from the suction port 7 is supplied by the air filter 28 that is detachably fitted to the holder 30. It filters in the front | former stage of the air blower 13 (refer FIG. 3). The width dimension of the filter mounting port 31 on the main body box 4 side for housing the air filter 28 of the holder 30 is larger than the dimension of the width direction in which the air filter 28 is accommodated. It is configured to be blocked by the flange portion 32. With such a configuration, even when insects or dust adhering to the air filter 28 enter the holder 30, the filter mounting port 31 has a large width dimension, so that the cleaning property is good.

  The lowermost end surface of the holder 30 is substantially in the same position as the lower end surface of the suction port 7, and a drain hole leading to the holder 30 is provided in the portion of the suction port surface of the fan casing 27. The air filter 28 housed in the holder 30 can be maintained and replaced while the front grille 5 is attached by opening and closing an open / close lid 33 provided on the front surface of the front grille 5. And the air leak of the fitting part with the holder 30 is prevented by the double structure with the packing material provided in the flange part 32 of the holder 30 by the opening / closing lid 33. For the air filter 28, for example, a high-performance material is used for the purpose of removing pollen, and if the invasion of insects or the like is prevented, the non-woven fabric or the saran net has a relatively small pressure loss and is not easily clogged. Use things. Further, a heat insulating material is affixed to the inside of the fan casing 27 of the motor fixing plate 25 or the opposite side thereof, and the air supply space 3 is substantially in a form combined with the fan casing 27 and the holder 30 integrally formed of foamed polystyrene. It has a completely insulated structure.

  For the heat insulation of the portion of the motor fixing plate 25 facing the inner surface of the fan casing 27, a heat insulating material may be applied as described above. However, in order to improve workability, for example, a heat insulating member made of foamed polystyrene having a thickness of about 10 mm is used. The drive motor 15 may be fixed to the motor fixing plate 25 after the motor fixing plate 25 is fitted from the side where the motor is located. In addition, although the cushion material for preventing an air leak as needed is stuck to these connection parts, it is because an air leak leads to generation | occurrence | production of dew condensation and a malfunction arises.

  The holder 30 configured as a combined body of two frame elements is designed to improve workability and quality by adopting a configuration in which condensed water does not leak at the connecting portion, such as a fitting connection by concaves and convexes or a seal stamping connection. be able to. Further, by providing a space S by a protrusion at a position where the lower surface of the holder 30 of the filter mounting port 31 contacts, for example, a phenomenon in which condensed water adhering to the air filter 28 oozes out from a coupling portion of the holder 30 during operation when fog is generated. Can be reduced.

  As shown in FIG. 4, the upper part of the back side of the exhaust space 2 of the main body box 4 is composed of two parts in the space surrounded by the fan casing 18 of the exhaust blower 12 and the upper inner wall of the main body box 4. An electrical component storage case 34 is provided. In the electrical component storage case 34, electrical components such as a quick connection terminal and a strength switching switch 35 are stored. As shown in FIG. 5, the electrical component storage case 34 is fitted in a space portion surrounded by the fan casing 27 of the air supply blower 13 and the upper inner wall of the main body box 4 at the upper rear side of the air supply space 3. ing. The electrical component storage case 34 is provided with a connecting piece 37 that engages with a locking hole 36 provided at the upper back of the main body box 4, and is connected by coupling the connecting piece 37 and the locking hole 36 together with fitting. The rigidity of the upper part of the back surface of the main body box 4 is increased by the supporting action of the piece 37.

  The shape of the electrical component storage case 34 is elongated, and electrical components such as capacitors are stored on the side located in the space. By adopting such a configuration, even if rainwater enters from the suction port 7 or the outlet 8 on the back of the main body box 4 and leaks into the air supply space 3 or the exhaust space 2, the suction port 7 or Since there is an electrical component storage case 34 above the air outlet 8, water is not splashed on the electrical component. The electrical component storage case 34 provided in the exhaust space 2 has a larger volume because the exhaust blower 12 is a more compact axial flow type than the supply air blower 13, and more important, such as a quick connection terminal. The electrical parts which need to be stored. Further, since there is no condensation due to the exhaust space 2, electrical components that are vulnerable to condensation are also stored in the electrical component storage case 34.

The suction opening 7 and the air outlet 8 on the back surface of the main body box 4 are a second opening / closing shutter and a first opening / closing shutter, and a sliding door type air supply shutter that opens and closes each of the air inlet 7 and the air outlet 8. 38 and an exhaust shutter 39 are provided. An air supply shutter 38 that opens and closes the inlet 7 and an exhaust shutter 39 that opens and closes the outlet 8 are housed in the space on the back of the main body box 4, and the back provided at the portion of the outlet 8 and the inlet 7. It is pressed from the back side by the face plate 40. A heat insulating material is attached to the entire back surface of the back plate 40 to prevent condensation at this portion. The air supply shutter 38 is provided with a notch 41 for maintaining contact with the outside of the flange 9 of the suction port 7 even in the closed state, and water generated on the air supply space 3 side regardless of whether the air supply shutter 38 is opened or closed. Can be drained. The air supply shutter 38 and the exhaust shutter 39 are provided with operation knobs 42 and 43 at their lower ends, respectively, and are drawn out from a slit formed on the lower surface of the main body box 4.

  7 and 8 are rear views showing the state in which the back plate 40 is removed. FIG. 7 shows the supply shutter 38 and the exhaust shutter 39 in the open state, and FIG. 8 shows the supply shutter 38 and the exhaust shutter 39. Represents a closed state. Since the operation knobs 42 and 43 are arranged on the left and right sides of the main body box 4, it is possible to see which state the air supply shutter 38 and the exhaust shutter 39 are in when viewed from the lower surface of the main body. For example, even if the air supply shutter 38 is temporarily closed due to a typhoon or the like, it is possible to avoid being unaware that it is in that state. The gap between the operation knobs 42 and 43 of the air supply shutter 38 and the exhaust shutter 39 and the slit of the arm portion drawn out from the slit of the main body box 4 is a packing material attached to the main body box 4 side or the back plate 40 side. It is blocked by. Due to the function of the packing material, warm air on the indoor side and cold air on the air supply side are mixed from this gap portion in winter, and condensation water can be prevented from dripping from this portion into the indoor side. In consideration of the case where the packing material does not function, the operation knobs 42 and 43 are provided so that the gap portion of the slit is closed regardless of whether the supply shutter 38 and the exhaust shutter 39 are open or closed. The ribs 4A, 4B, 4C and 4D are provided at the lower part of the main body box 4 which is provided at the approximate center of the width of the air supply shutter 38 and the exhaust shutter 39 and is located at the bottom of the air supply shutter 38 and the exhaust shutter 39. Is formed.

  As shown in FIG. 4, the main body box 4 is mounted by a steel plate mounting bracket 44 that is screwed to the wall surface W of the room. The mounting bracket 44 has a round hole in the center, and has a hook 46 that can be hooked in the upper locking hole 45 on the back side of the main body box 4 at the upper part. A projecting portion that fits into the lower back of the main body box 4 is provided at the lower portion, a hook 46 is hooked on the locking hole 45, and a screw 47 is tightened from the lower surface of the main body box 4 into the screw hole of the projecting portion. Thus, the main body box 4 is attached to the wall surface W of the room. A connecting flange 48 is inserted through the round hole of the mounting bracket 44, and the mounting bracket 44 is hooked by a flange portion of the connecting flange 48 with a packing material interposed therebetween. The connection flange 48 has a partition wall in the center, and has an air supply path and an exhaust path communicating with the suction port 7 and the air outlet 8 on the back surface of the main body box 4. This connection flange 48 is connected to a double-layered pipe ventilation duct 49 having a cylindrical shape and a partition in the center embedded in a circular ventilation hole provided through the wall with a downward slope.

  The upper part of the back surface of the main body box 4 having the locking holes 45 to be hooked on the hooks 46 has a large concave shape into which the electric component storage case 34 fits in the rear view, so that the strength tends to decrease. Even at the time of molding 4, the upper part of the back surface is deformed into a concave shape. This deformation is corrected by fitting the electric component storage case 34, and the strength around the locking hole 45 of the main body box 4 is complemented by the coupling of the connecting pieces 37 of the electric component storage case 34.

  This supply / exhaust ventilation fan can perform only simultaneous supply / exhaust operation and exhaust operation, and the processing air volume of supply / exhaust can also be changed by opening / closing the supply shutter 38 and the exhaust shutter 39. However, operation with only air supply is disabled. That is, since no filter is provided on the exhaust side, invasion of insects cannot be prevented when the operation is stopped and the exhaust shutter 39 is not closed. In addition, since the circuit configuration is complicated as will be described later, an operation pattern that is not normally required cannot be used to prevent the above-described problems.

  On the other hand, when the air supply side air supply shutter 38 opens the suction port 7, the air supply blower 13 operates to suck outdoor air from the suction port 7 and is provided on the upper right side of the front grill 5. The air is blown out slightly upward from the air supply outlet 10. At this time, the air sucked from the suction port 7 is sucked into the fan casing 27 through the air filter 28 held by the holder 30. Accordingly, the dirt is less likely to adhere to the multi-blade blades 17 which are easily adhered and difficult to clean, and the supply air blower 13 can be easily maintained. Although the blowing side noise of the air supply blower 13 is larger than the suction side noise, since the sound absorbing material 29 is pasted in the vicinity of the blowing portion of the fan casing 27, not only a quiet air supply is performed, but also the fan It is also possible to prevent the condensed water that has entered the casing 27 from being blown out as large particles.

  When the operation knob 43 of the exhaust exhaust shutter 39 is operated in the state shown in FIG. 3 to move the exhaust shutter 39 leftward in FIG. 3 to the position of the broken line, the exhaust outlet 8 is fully opened. However, the exhaust blower 12 is operated even when the exhaust shutter 39 is fully closed. When the exhaust fan 12 is operated, indoor air is sucked into the suction guide 23 from the suction port 11 on one side of the front grill 5 and sucked into the fan casing 18 by the rotation of the axial flow vane 16 from the bell mouth 22. Be turned. Then, the blowing direction is bent at a substantially right angle by the blowing guide 20 of the cover structure 21 on the drive motor 14 side, and the air is exhausted from the outlet 8 on the back surface of the main body box 4 to the outside through the two-layer pipe ventilation duct 49.

  As shown in FIG. 4, the fan casing 18 of the exhaust blower 12 has a shape similar to the fan casing of a multi-blade blower when viewed from the suction side of the axial flow vane 16, so Unlike the elbow fan casing, the air flow can be bent smoothly and the noise is reduced. Further, since the bell mouth 22 having an inner diameter of about 50 to 70% of the outer diameter of the axial flow vane 16 is provided on the suction side of the fan casing 18, the open air volume is lower than that without the bell mouth 22. The static pressure of things increases.

  Here, the size of the inner diameter of the bell mouth 22 is usually about 70% of the outer diameter of the axial vane 16, but for example, in the case of ventilation with a very small air volume, when the power of the motor is excessively reduced. In this case, the inner diameter is reduced to 50% of the outer diameter of the axial flow blade 16 to reduce the blade load. Can be adjusted. And since it was set as the shape which guides the flow of suction air to the back side of the main body box 4 which faces the suction inlet of a blade | wing, even if the suction inlet 11 of the front grille 5 is not located in the suction inlet of the fan casing 18, the characteristic of There is little deterioration, and the exhaust side can sufficiently ventilate even if the exhaust outlet 8 is small because it is connected to the two-layer pipe ventilation duct 49. Since the air supply blower 13 is a multi-blade type and has a high blown air speed, a short circuit is hardly caused by the airflow blown from the air supply outlet 10 and the airflow sucked from the exhaust inlet 11. Specifically, if the distance between the air outlet 10 and the air inlet 11 is 60 mm or more, the short circuit is 1% or less and can be ignored.

  In this state, when the operation knob 42 of the air supply shutter 38 is operated to move the air supply shutter 38 to the position of the broken line in the left direction in FIG. 3, the air supply inlet 7 is blocked and the air supply shutter 38 is closed. The supply air volume of the air blower 13 gradually decreases, but the noise increases accordingly. The degree of the increase in noise generally increases by about 2 dB when the air supply shutter 38 is in a half-open state and increases by about 5 dB when the air supply shutter 38 is in a fully closed state, but in the fully closed state, the air supply provided on the lower surface of the main body box 4 is increased. The operation of the supply air blower 13 can be stopped by turning off the switch 26.

  As described above, the supply / exhaust ventilation fan can be ventilated only by supply / exhaust and exhaust according to the needs of the user or according to the outdoor conditions, and can also change the processing air volume related to supply / exhaust. So it is easy to use and suitable for constant ventilation.

  In the ventilation operation by simultaneous supply and exhaust, for example, in winter, when the room temperature is about 20 ° C. and the outdoor temperature is about 0 ° C., condensation tends to occur at the boundary between the indoor air and the outdoor air, Exhaust air and air supply are easy to mix, but in the air supply / exhaust ventilation fan of the present embodiment, the fan casing 27 of the air supply blower 13 and the holder 30 of the air filter 28 have a heat insulating structure, so there is no risk of condensation. Since the air supply space portion 3 and the exhaust space portion 2 are integrally formed with the main body box 4, there is no fear of air leakage, manufacturing is easy, and manufacturing cost is reduced.

  In general, an axial-flow type blower is suitable for specifications with a low static pressure and a large air volume, and dust hardly adheres to the axial flow blade. A small axial flow type blower is driven by a drive motor called a condenser run induction motor, and since the blade load is low, it is driven to rotate around the synchronous speed of the motor, and is operated at a high efficiency point. And it is characterized by very low noise, low power consumption, and long drive motor life.

  In addition, the multi-blade type blower is suitable for the specifications of medium static pressure and medium air volume, and dust tends to adhere to the multi-blade blades, but the air volume is not reduced by static pressure application and the change in noise is small. A small multi-blade type blower is driven by a drive motor called a condenser run induction motor. The blade load is larger than that of the axial flow type and is driven to rotate at a point lower than the synchronous speed of the motor, resulting in low efficiency. Since operating at a point, the maximum blade efficiency is higher than that of the axial flow type, but the power consumption is also higher. Although it is low noise, there is a feature that the blower body is also large.

  Since the starting capacitors of the drive motors 14 and 15 are built in the motors and do not have auxiliary coil windings as means for changing the motor power, the lead wires are two as shown in FIG. ing. For this reason, the weak notch for reducing the power is performed by switching to a circuit in which a voltage dividing capacitor 50 is connected in series with the drive motors 14 and 15 by the changeover switch 35. The switch can be switched by a relay that is wired outside the main unit. However, in order to switch the strength without requiring a switch operation outside the main unit, a common terminal is required, and the electrical wiring is three-wired, making wiring work cumbersome. And misconnections are also likely to occur.

  In a supply / exhaust ventilation fan used in a room, an air filter 28 that cleans the outside air taken into the room is also important. The exhaust blower 12 is configured with an axial flow vane 16 that is not easily dusty and does not require an air filter, the air supply blower 13 is a multi-blade type, an air filter 28 is disposed in front of the multi-blade blade 17, and the multi-blade It prevents dust from adhering to the blades 17.

  By making the axial directions of both the supply air blower 13 and the exhaust blower 12 substantially horizontal, the air path of the supply air space portion 3 and the exhaust space portion 2 becomes very simple and has a compact configuration. A ventilation fan that rotates two blades with a single motor is expensive because it uses an expensive double-axis motor with a small number of units. The use of two drive motors that are used in large numbers and at low manufacturing costs makes it easier to take measures against air leakage, lowers manufacturing costs, and achieves low noise, power saving, and long life. And since the supply air blower 13 can be stopped, for example, when fog is generated or when wind and rain are strong, the supply air can be stopped and ventilation can be performed only by exhaust, which is easy to use.

  Necessary ventilation airflow is closely related to room temperature as well as the difference in the materials used in the building. For example, since harmful substances generated from building materials, furniture, etc. are generated in large amounts in summer when the temperature is high, a large amount of ventilation air is required. For this reason, changing the processing air volume according to the opening / closing state of the air supply shutter 38 and the exhaust shutter 39 is highly effective from the viewpoint of usability. In the present embodiment, for both supply and exhaust, static pressure application is increased by reducing the opening area of the inlet port 7 and the opening area of the outlet port 8 by opening / closing the supply shutter 38 and the exhaust shutter 39. There is little increase in noise. Especially on the exhaust side, the noise rather decreases due to the characteristics of the exhaust blower 12. Changing the processing air volume according to the opening / closing state of the air supply shutter 38 is also effective in eliminating the feeling of cold air due to the intake of outside air in winter. When the outside air temperature rapidly decreases, the supply air blower 13 is turned off by turning off the supply air switch 26 provided on the lower surface of the main body box 4, and the supply air shutter 38 is further closed. This can be done primarily.

  The purpose of this supply / exhaust ventilation fan is to perform ventilation by simultaneous supply / exhaust at all times. Therefore, it is not necessary to wire a switch for switching the ventilation air volume to the outside of the main body, and the supply shutter 38 and the exhaust shutter 39 are opened and closed. Since it can be adjusted according to the degree, it has been devised not to require time-consuming electric wiring work. That is, the electrical wiring is a two-wire wiring with a quick connection terminal, and the motor power adjustment is a selection of 0.5 ventilation and 0.7 ventilation according to the type of building material, and a changeover switch provided near the quick connection terminal 35. Further, since the power switch 24 and the air supply switch 26 are provided on the exhaust space 2 side of the lower surface of the main body box 4, the electrical wiring connects the two wires to the quick connection terminal, and the selector switch 35 in the vicinity thereof. Can be switched. As for the ventilation air volume, since most cases are 0.5 times ventilation, the changeover switch 35 may be set to the ventilation side 0.5 times in advance. In this embodiment, two changeover switches 35 are provided. However, if a switch having four contacts is used, one switch is sufficient.

  And since the suction inlet 11 for exhaust and the blower outlet 10 for air supply are arrange | positioned at the front upper part right and left of the main body box 4, the blower outlet 10 of the air supply by the dirt of the wall surface by exhaust air, a curtain, etc. Problems such as being blocked and not being installed can also be resolved. The fan casing 18 of the exhaust blower 12 is composed of two parts, a cylindrical structure 19 and a cover structure 21, and the cylindrical structure 19 is fitted and attached to the cover structure 21, so that the cylindrical structure 19 and the front grill 5 are removed. The axial flow vane 16 can be cleaned. By forming the cover structure 21 of the fan casing 18 as an integrally molded product of resin and attaching the drive motor 14 thereto, the cover structure 21 can be fitted into the exhaust space 2 of the main body box 4 as it is. Is good and it is excellent in assemblability.

It is a disassembled perspective view of a supply / exhaust ventilation fan. (Embodiment 1) It is a partial exploded perspective view of a supply / exhaust ventilation fan. (Embodiment 1) It is a longitudinal front view of the same supply / exhaust ventilation fan. (Embodiment 1) It is the vertical side view by the side of the exhaust space similarly shown in the attachment state. (Embodiment 1) It is the vertical side view by the side of the air supply space part similarly shown in the state before attachment. (Embodiment 1) It is the perspective view which showed the whole supply / exhaust ventilation fan. (Embodiment 1) FIG. 6 is a rear view showing an open state of an air supply shutter and an exhaust shutter. (Embodiment 1) FIG. 6 is a rear view illustrating a closed state of an air supply shutter and an exhaust shutter. (Embodiment 1) It is the circuit block diagram which showed the electric circuit of the supply / exhaust ventilation fan. (Embodiment 1)

Explanation of symbols

  2 exhaust space, 3 air supply space, 4 body box, 7 air inlet, 8 air outlet, 9 樋, 10 air outlet, 11 air inlet, 12 exhaust air blower, 13 air supply fan, 16 axial flow blade, 17 Multi-blade blade, 18 Fan casing, 19 Cylindrical structure, 20 Blowout guide, 21 Cover structure, 22 Bell mouth, 23 Suction guide, 27 Fan casing, 28 Air filter, 30 Holder, 32 Flange, 34 Electrical component storage case, 37 Connecting piece, 38 Air supply shutter, 39 Exhaust shutter, 41 Notch.

Claims (15)

Connected to one partitioned duct,
The exhaust outlet provided on the back of the main body communicating with one of the spaces partitioned by the duct, and the one of the spaces through the exhaust outlet, the indoor air driven and sucked by the first drive motor. An exhaust space having an exhaust blower for exhausting to
A second intake air port that is communicated with the other partitioned space of the duct and is adjacent to the exhaust outlet and is separated from the exhaust space portion by a partition wall , and a blade is attached to the rotating shaft. air supply space and a supply air blower supplying air to the chamber is sucked in a horizontal direction as viewed from the front body through the air supply inlet to be driven by the drive motor air in the other space,
A main body box that has the exhaust space, the air supply space, and the partition and is attached to the wall of the room;
An air supply / exhaust ventilation fan provided with an air filter that filters air that is inserted into and removed from the front surface of the main body box between the air supply inlet and the air inlet of the air supply fan. Air filter is mounted while being inserted into or removed from storage section provided in the main body box body, the supply and exhaust ventilation fan according to claim 1, further comprising a holder having a flange for closing the housing section. The supply / exhaust ventilation fan according to claim 1, wherein the exhaust blower is an axial flow type or a mixed flow type. The supply / exhaust ventilation fan according to claim 3 , wherein the supply air blower is a multi-blade type. The supply / exhaust ventilation fan according to claim 3 , further comprising an electrical component storage case in the exhaust space. A vane is attached to the rotating shaft of the first drive motor, and an outer peripheral direction is the outer peripheral direction of the vane, and a blowout guide that covers the vane and the outer shell of the first drive motor and guides air to the duct. The fan casing for exhaust air blowers which has and the supply of Claim 3 provided with the bell mouth which has an internal diameter about 50 to 70% of the said blade outer diameter provided in the end of the cylindrical axial direction of the fan casing for said exhaust air blowers. Exhaust ventilation fan. The supply / exhaust ventilation fan according to claim 1, further comprising a switch connected between a second drive motor and a power source to operate or stop the supply air blower. The supply / exhaust ventilation fan according to any one of claims 1 and 7 , further comprising a switch connected between the first drive motor and a power source to operate or stop the exhaust blower. The supply / exhaust ventilation fan according to claim 1, further comprising a changeover switch for adjusting a motor power of the first drive motor. The supply / exhaust ventilation fan according to claim 9 , wherein the changeover switch connects a power source and the first drive motor, or connects the power source and a capacitor connected to the first drive motor. The supply / exhaust ventilation fan according to claim 1, further comprising a changeover switch for adjusting a motor power of the second drive motor. The supply / exhaust ventilation fan according to claim 11 , wherein the changeover switch connects a power source and a second drive motor, or connects the power source and a capacitor connected to the second drive motor. The supply / exhaust ventilation fan according to claim 1, wherein the rotation shaft of the first drive motor and the rotation shaft of the second drive motor are horizontal. Connected to one partitioned duct,
The exhaust air outlet provided on the back of the main body communicating with one of the spaces partitioned by the duct and the indoor air driven by the first drive motor are opened and closed by a sliding door type first opening / closing shutter. An exhaust space part having an exhaust blower for exhausting to the one space through the exhaust outlet;
And air supply inlet adjacent said exhaust outlet in communication with the other space partitioned with the duct, with partitioned and the exhaust space by the partition, the other being driven by a second drive motor air supply space and a supply air blower supplying air to the chamber is sucked in a horizontal direction as viewed from the front body through the air supply inlet to the air space is opened and closed by the second opening and closing shutter sliding door Part,
A main body box that has the exhaust space, the air supply space, and the partition and is attached to the wall of the room ;
A supply device comprising an air filter that is inserted into and removed from the front surface of the main body box between the air supply inlet and the air inlet of the air supply blower, and filters the air sucked into the air supply blower. Exhaust ventilation fan. 15. The supply / exhaust ventilation fan according to claim 14 , wherein the first opening / closing shutter and the second opening / closing shutter include an operation knob operated outside the main body box.

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