JP5531825B2 - Air conditioner - Google Patents

Description

    The present invention relates to an air conditioner, and particularly relates to improvement of static pressure efficiency and noise countermeasures.

    Conventionally, an air conditioner called an air handling unit has been used (see Patent Document 1 below). In the air conditioner, a hot water coil, a cooling coil, a blower fan, and the like are incorporated in a casing in which an air inlet and an outlet are formed. In the above air conditioner, air (outside air or room air) outside the casing is drawn into the inside from the inlet through a duct or the like due to the operation of the blower fan, and hot water in the hot water coil or cold water and heat in the cooling coil. After the replacement, it is supplied into the room from the outlet through a duct or the like. The indoor air is heated or cooled by the supplied air, whereby the temperature of the indoor air is adjusted.

    Incidentally, in the following Patent Document 1, an air conditioner using a plug fan as a blower fan is proposed. The plug fan is a backward fan having an impeller having a plurality of backward blades, and has a higher static pressure efficiency than a sirocco fan that is a multiblade fan. In the air conditioner as described above, the plug fan usually does not have a housing and is installed in the casing with the impeller exposed.

JP-A-11-304181

    However, in the above-described air conditioner using the plug fan, the outlet side space of the plug fan in the casing is in a positive pressure state where the pressure is higher than the outside. As a result, there is a risk that the air in the blow-out side space after temperature adjustment may leak to the outside from between the outer wall panels forming the casing, and it is not possible to improve the static pressure efficiency despite using a plug fan. was there. Moreover, in the said structure, since the blowing air of a plug fan hits the inner surface of a casing, there exists a possibility that a casing may vibrate and a vibration sound will arise and it may become noise.

    This invention is made | formed in view of this point, The objective is to aim at the improvement of the static pressure efficiency of an air conditioning apparatus, and reduction of a noise.

The first invention includes a plug fan (7), a heat exchanger (4, 5) through which air flowing by the plug fan (7) passes, an air inlet (21) and an outlet (22). And an air conditioner having a casing (2) in which the plug fan (7) and the heat exchanger (4, 5) are provided. The plug fan (7) It has a housing (10) in which an inlet (10h) and an outlet (10i) are formed, and is connected to the outlet (10i) and the outlet (22) in the casing (2). And an air flow path (P1) for guiding the air blown from the plug fan (7) to the outlet (22), and a box (16) configured as a silencer having a silencing mechanism (30). The casing (2) has a first panel (2c) and a second panel (2e) connected vertically, and the box (16) is Each has the first panel (2c) and said second panel (2e) parallel pair of which is fixed to the plate-like member (18a, 18b).

    In the first invention, when the plug fan (7) operates, air is sucked into the casing (2) from the inlet (21). The temperature of the air sucked into the casing (2) by the plug fan (7) is adjusted (heated or cooled) when passing through the heat exchanger (4, 5). The air after temperature adjustment is sucked into the housing (10) from the suction port (10h) of the plug fan (7) and supplied to the supply destination such as the room outside the casing (2) through the box (16). To adjust the temperature of the air in the destination space.

    In the first invention, the plug fan (7) is covered by the housing (10), and the housing (10) and the outlet (22) of the casing (2) are connected by the box (16). . Therefore, the air blown from the plug fan (7) is not blown out toward the inner surface of the casing (2), but flows out of the casing (2) through the box (16). Thereby, the inside of a casing (2) will be in the negative pressure state whose pressure is lower than the exterior.

Further, in the first invention, the blowout sound that is generated when the plug fan (7) is blown out and contributes to the noise, the blown air passes through the box (16) and reaches the outlet (22). Until the noise reduction mechanism (30).

In the first invention, the pair of parallel plate-like members (18a, 18b) of the box (16) having the silencing mechanism (30) includes the first panel (2c) constituting the casing (2) and the The first panel (2c) is fixed to the second panel (2e) vertically connected to the first panel (2c). Thereby, a pair of said plate-shaped member (18a, 18b) functions as a bracing spanned over the 1st panel (2c) and the 2nd panel (2e), respectively. That is, when an external force is applied that deforms the corner formed by the first panel (2c) and the second panel (2e), the pair of plate-like members (18a, 18b) are moved to both panels (2c, The deformation of the corners is suppressed by stretching between 2e) or pulling both panels (2c, 2e). Thereby, the corner | angular part of the casing (2) which is easy to deform | transform will be reinforced by a pair of parallel rectangular plate-shaped member (18a, 18b) of a box (16).

In a second aspect based on the first aspect , the box (16) is formed such that the flow path cross-sectional area of the air flow path (P1) gradually increases toward the downstream side.

In the second invention, the air channel (P1) formed by the box (16) has a channel cross-sectional area that gradually expands toward the downstream side.

    According to the first invention, the plug fan (7) with high static pressure efficiency is covered with the housing (10), and the blown air is guided to the outlet (22) of the casing (2) through the box (16). Therefore, the inside of the casing (2) can be in a negative pressure state where the pressure is lower than the outside. Thereby, internal air can be prevented from leaking outside through the gap between the outer wall panels of the casing (2). As a result, in the heat exchanger (4, 5), the temperature-adjusted air can be supplied from the outlet (22) to a supply destination such as a room without leaking outside the casing (2). Therefore, the static pressure efficiency of the air conditioner can be improved.

    Moreover, according to 1st invention, the noise which generate | occur | produces in an air conditioning apparatus can be reduced. Specifically, by covering the plug fan (7) with the housing (10), it is possible to suppress the noise of the fan itself from leaking outside the casing (2) due to the transmission loss of the housing (10). Further, by providing the housing (10), it is possible to prevent the casing (2) from vibrating due to the blown air of the plug fan (7) hitting the inner surface of the casing (2). Therefore, generation of vibration noise can be prevented.

Moreover, according to 1st invention, in the box (16) which has a silencing mechanism (30), the noise which generate | occur | produces in an air conditioning apparatus (1) is reduced by reducing the blowing sound by a plug fan (7). Can be reduced.

According to the first invention, the pair of parallel plate-like members (18a, 18b) of the box (16) having the silencing mechanism (30) is used as the first panel (2c) constituting the casing (2). And the second panel (2e) vertically connected to the first panel (2c), the pair of plate members (18a, 18b) are respectively connected to the first panel (2c) and the second panel (2c). It can function as a brace that spans two panels (2e). That is, when an external force is applied that deforms the corner formed by the first panel (2c) and the second panel (2e), the pair of plate-like members (18a, 18b) are moved to both panels (2c, By stretching between 2e) or pulling both panels (2c, 2e), the corners can be reinforced and deformation of the corners can be suppressed. Thereby, a deformation | transformation of a casing (2) can be suppressed.

    In addition, in the casing (2) assembled in a box shape as a structural member rather than being fixed to the frame as a plurality of outer wall panels, corner portions are particularly easily deformed. Therefore, in such a casing (2), the above effect becomes more remarkable.

    Further, the reinforcing member of the casing (2) as described above is constituted by a silencer having a silencing mechanism (30) without providing a separate structural member, thereby suppressing an increase in the size of the casing (2). Can be prevented from being deformed.

Further, according to the second invention, the box (16) is formed such that the flow passage cross-sectional area of the air flow passage (P1) gradually increases toward the downstream side. Can be reduced. Therefore, the static pressure efficiency of the air conditioner (1) can be further improved.

FIG. 1 is a perspective view of an air-conditioning apparatus according to Embodiment 1 of the present invention. FIG. 2 is a diagram showing an internal structure of the air conditioner of FIG. FIG. 3 is a front view showing the periphery of the blower fan with the front panel of the air conditioner of FIG. 1 removed. FIG. 4 is an enlarged longitudinal sectional view showing the vicinity of the blowing chamber. FIG. 5 is an enlarged longitudinal sectional view showing the vicinity of the blowing chamber of the air conditioner according to the second embodiment. FIG. 6 is a front view showing the periphery of the blower fan with the front panel of the air-conditioning apparatus according to Embodiment 3 removed.

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

Embodiment 1 of the Invention
As shown in FIGS. 1 and 2, an air conditioner (1) according to the present invention includes an air filter (3), a cold water coil (4), a hot water coil (5), and a humidifier inside a casing (2). This constitutes a so-called air handling unit provided with (6) and a blower fan (7).

    The casing (2) has a plurality of outer wall panels (2a, 2b, 2c, 2d, 2e, 2f) assembled in a box shape. In the present embodiment, the front surface (vertical surface on the near side in FIG. 1) is configured by three front panels (2a), and the rear surface (vertical surface on the rear side in FIG. 2) is configured by three back panels (2b). ing. Further, the left side surface (left vertical surface in FIG. 1) is constituted by one left side panel (2c), and the right side surface (right vertical surface in FIG. 2) is constituted by one right side panel (2d). Further, the upper surface is constituted by one upper panel (2e), and the lower surface is constituted by one base (2f). The casing (2) is composed of two struts (2g, 2h) extending vertically from the base (2f) toward the top panel (2e), the struts (2g, 2h), and the left panel (2c). It has beam members (2i, 2j) spanned between them, a partition plate (2l) to be described later, and a column (2k) fixed to the front surface of the partition plate (2l).

    In the present embodiment, the back panel (2b), the left panel (2c), the right panel (2d), and the top panel (2e) are fixed by screws. On the other hand, each of the three front panels (2a) is configured as a door that can rotate around a vertical axis, and maintenance of the internal devices is performed by opening the front panel (2a). Of the three front panels (2a) configured as a door, the left front panel (2a) in FIG. 1 is supported on the left panel (2c) by a hinge so as to be opened and closed. On the other hand, in FIG. 1, the middle and right front panels (2a) are supported by hinges (2k) so as to be freely opened and closed.

    In addition, an air inlet (21) and an outlet (22) are formed in the top panel (2e). The inflow port (21) is provided on the right panel (2d) side, and a duct (not shown) communicating with the outside or the room is connected to the inflow port (21). On the other hand, the outflow port (22) is provided on the left panel (2c) side, and a duct communicating with a room (not shown) is connected to the outflow port (22). As a result, outside air or indoor air flows into the casing (2) through the duct and inflow port (21), and after the temperature and humidity are adjusted, the air enters the room through the outflow port (22) and the duct. Supplied.

    As described above, the air filter (3), cold water is placed inside the casing (2) from the right side panel (2d) on the inlet (21) side toward the left side panel (2c) on the outlet (22) side. The coil (4), the hot water coil (5), the humidifier (6) and the blower fan (7) are installed in this order. A partition plate (2l) made of a vertical plate is provided between the air filter (3) and the cold water coil (4). The partition plate (2l) divides the internal space into an inflow side space (S1) on the inflow port (21) side and an outflow side space (S2) on the outflow port (22) side.

    Although not shown, the partition plate (2l) has an air circulation port, which is sandwiched between the air filter (3) and the cold water coil (4). With such a configuration, air that has flowed into the inflow side space (S1) from the inflow port (21) passes through the air filter (3), and then flows into the cold water coil (4) through the distribution port of the partition plate (2l). Will be. The air filter (3) has a pre-filter and a main filter, and purifies the air by removing dust in the air in two stages.

    In addition, the cold water coil (4), hot water coil (5), and humidifier (6) are designed so that the air that has passed through the air filter (3) does not diffuse into the outflow side space (S2), and the cold water coil (4) The coil (5) and the humidifier (6) are connected so as to pass through in this order. That is, the outflow end of the air passage of the cold water coil (4) and the inflow end of the air passage of the hot water coil (5) are connected so that no air flows out to the outflow side space (S2), and the air of the hot water coil (5) The outflow end of the passage and the inflow end of the air passage of the humidifier (6) are connected so that air does not flow out to the outflow side space (S2).

    The cold water coil (4) and the hot water coil (5) are each constituted by a water-cooled heat exchanger. And cold water is supplied to a cold water coil (4) from the heat source machine outside the apparatus, and air is cooled by this cold water. On the other hand, hot water is supplied to the hot water coil (5) from an external heat source machine, and air is heated by the hot water. Thus, the temperature of the air that has passed through the air filter (3) is adjusted by the cold water flowing through the cold water coil (4) or the hot water flowing through the hot water coil (5), and the humidity is adjusted (humidified) in the humidifier (6). ) And discharged into the outflow space (S2).

    The blower fan (7) is an outflow side space (S2) of the internal space of the casing (2), and is provided directly under the outflow port (22). The blower fan (7) includes a fan body (8) and a motor (9). The fan body (8) is fixed to the base (12), and the motor (9) is fixed to the base (12) via the motor support base (13). The base (12) is fixed to a support base (15) fixed to the base (2f) via a vibration absorbing mechanism (14) that absorbs vibrations such as laminated rubber and springs.

    As shown in FIGS. 3 and 4, the fan main body (8) is a rearward fan including an impeller (8a) having a plurality of rearward blades, and in this embodiment, the plug is configured by a flat plate. A fan is used. The fan body (8) has a housing (10) that is formed with a suction port (10h) and a blowout port (10i) and covers the impeller (8a). The fan body (8) is formed in a so-called single suction type that sucks air only from one axial side of the impeller (8a). The fan body (8) has an air inlet (10h) of the housing (10) facing the air outflow end of the humidifier (6), while the air outlet (10i) of the housing (10) opens upward. It is provided to do.

    Specifically, the housing (10) has a box-shaped main body (10a) whose upper end surface is open, and a cylindrical rectifying section (10b) connected to the upper end of the main body (10a). ing. The main body (10a) surrounds the periphery of the impeller (8a), and the suction port (10h) is formed on one side in the axial direction of the impeller (8a), while the motor (9 ) Is rotatably supported. The rectifying unit (10b) is provided with a rectifying member such as a plate piece inside and adjusts so that the flow of air passing through the rectifying member does not spiral. Thereby, the pressure loss of the air flow by the said impeller (8a) can be reduced. Note that the opening at the upper end of the rectifying section (10b) constitutes an air outlet (10i) of the housing (10). Further, a part of the rectification unit (10b) is made of canvas cloth, and the part absorbs the vibration of the main body (10a) so as not to be transmitted to the box (16) described later. Is configured.

    The motor (9) is configured to directly connect the motor shaft to the impeller (8a) of the fan body (8) and to rotate the impeller (8a) without using a transmission mechanism such as a belt. ing. Therefore, the loss due to friction or the like is reduced as compared with the case of belt transmission, and the efficiency is improved.

    A box (16) is provided above the blower fan (7). The box (16) has an air flow path (P1) formed therein, an air inlet (16a) formed on the bottom surface, and an air outlet (16b) formed on the top surface. The inlet (16a) is connected to the outlet (10i) of the housing (10) (the top opening of the rectifying unit (10b)), while the outlet (16b) is connected to the outlet (22) of the casing (2) It is connected to the.

    As shown in FIGS. 2 to 4, the box (16) includes a front plate (18a) and a rear plate (18b) which are a pair of parallel rectangular plate-like members. The box (16) includes a left plate (18c) and a right plate (18d) which are rectangular plate-like members vertically spanned between the front plate (18a) and the rear plate (18b). Yes. Thus, the side surface of the box (16) is constituted by four rectangular plate members (18a, 18b, 18c, 18d). The bottom surface of the box (16) is constituted by a bottom plate (18e) which is a rectangular plate-like member formed with an introduction port (16a), and the top surface is opened to constitute a lead-out port (16b). .

    Further, the front plate (18a) and the rear plate (18b) of the box (16) are fixed to the upper panel (2e) and the left panel (2c), respectively.

    In this embodiment, the front plate (18a) is fitted in a rectangular frame constituted by the upper panel (2e), the left panel (2c), the support column (2g), and the beam member (2i). And fixed to these frame members. That is, the front plate (18a) has the upper surface (41) fixed to the upper panel (2e), the left side surface (42) fixed to the left side panel (2c), and the lower surface (43) fixed to the beam member (2i). The right side surface (44) is fixed to the column (2g).

    Similarly, the rear plate (18b) is fitted into a rectangular frame composed of a top panel (2e), a left panel (2c), a column (2h), and a beam (2j). Each is fixed to the frame material. In other words, the rear plate (18b) has the upper surface (41) fixed to the upper panel (2e), the left side surface (42) fixed to the left panel (2c), and the lower surface (43) fixed to the beam (2j). The right side surface (44) is fixed to the column (2h).

    As described above, the front plate (18a) and the rear plate (18b), which are a pair of parallel plate-like members of the box (16), have their upper surfaces (41) fixed to the upper panel (2e), respectively, By fixing (42) to the left panel (2c), the corner portion (51) formed therebetween is reinforced so as not to be deformed.

    In the present embodiment, similarly, the front plate (18a) has a left side surface (42) fixed to the left side panel (2c) and a lower surface (43) fixed to the beam member (2i). The corners (52) formed in the are reinforced so as not to be deformed. The front plate (18a) has a lower surface (43) fixed to the beam material (2i) and a right side surface (44) fixed to the column (2g). Is reinforced to prevent deformation. Further, the front plate (18a) has a right side surface (44) fixed to the support column (2g) and an upper surface (41) fixed to the upper surface panel (2e), thereby forming a corner (54) therebetween. Is reinforced to prevent deformation.

    Similarly, the rear plate (18b) has a left side surface (42) fixed to the left surface panel (2c) and a lower surface (43) fixed to the beam member (2j), thereby forming an angle between them. The part (52) is reinforced to prevent deformation. The rear plate (18b) has a lower surface (43) fixed to the beam material (2j) and a right side surface (44) fixed to the column (2h). Is reinforced to prevent deformation. Further, the rear plate (18b) has a right side surface (44) fixed to the support column (2h) and an upper surface (41) fixed to the upper surface panel (2e). Is reinforced to prevent deformation.

    Moreover, as shown in FIG. 4, the silencer mechanism (30) is provided in the inside of the box (16). The silencer mechanism (30) includes a plurality of baffle plates (31) and a silencer member (32) such as glass wool. The plurality of baffle plates (31) are arranged so as to allow the air flowing in from the introduction port (16a) to pass therethrough and prevent the sound waves generated when blown out from the blower fan (7) from being reflected. . Specifically, in the present embodiment, the plurality of baffle plates (31) are arranged at an interval from the inlet (16a) to the outlet (16b) of the box (16) and are adjacent to each other. Of the baffle plate (31), the baffle plate (31) on the outlet port (16b) side is arranged so as to shift to the left. Moreover, the muffling member (32) is attached to the inner wall surface of the box (16). With such a configuration, the air flowing into the box (16) flows along the baffle plate (31) to the outlet (16b), while the sound waves entering the box (16) It is reflected by 31) and absorbed by the silencer (32).

-Driving action-
Cold water cooled in the heat source machine outside the machine is circulated through the cold water coil (4), and hot water heated in the heat source machine outside the machine is circulated through the hot water coil (5). At the same time, the motor (9) of the blower fan (7) is energized to rotate the impeller (8a) of the fan body (8). The rotation of the impeller (8a) of the fan body (8) causes the air in the outflow side space (S2) of the casing (2) to be sucked into the housing (10), and the outflow side space (S2) and the outflow side space The inflow side space (S1) communicating with (S2) is in a negative pressure state where the pressure is lower than the outside of the casing (2). Thereby, external air flows into the inflow side space (S1) inside the casing (2) through the inflow port (21).

    The air flowing into the inflow side space (S1) passes through the air filter (3), and dust contained therein is removed by the air filter (3). The air that has passed through the air filter (3) passes through the circulation port formed in the partition plate (2l) and flows into the air passages of the cold water coil (4) and the hot water coil (5). In the air passages of the cold water coil (4) and the hot water coil (5), the temperature of the air is adjusted by exchanging heat with cold / hot water flowing in the coil. The temperature-adjusted air passes through the air passage of the hot water coil (5) and flows into the air passage of the humidifier (6). The air that has flowed into the air passage of the humidifier (6) is discharged to the outflow side space (S2) after the humidity is adjusted.

    As described above, the temperature adjusted in the cold water coil (4) / hot water coil (5) and the humidity adjusted in the humidifier (6) and released into the outflow side space (S2) is sent to the blower fan (7). Inhaled. Specifically, the air is sucked into the main body (10a) from the suction port (10h) facing the outflow end of the air passage of the humidifier (6) formed in the main body (10a) of the housing (10). And the air inhaled by the main-body part (10a) is sent out in a rectification | straightening part (10b) by the several backward blade | wing of the impeller (8a) rotating in a main-body part (10a).

    The air sent out by the impeller (8a) flows into the rectification unit (10b) and is rectified in the rectification unit (10b) so as not to be swirled by the rectification member provided therein. Thus, by rectifying the air flow sent out by the impeller (8a), the pressure loss of the air in the downstream air passage can be reduced. The rectified air flows into the inside from the inlet (16a) on the bottom surface of the box (16).

    The air flowing into the box (16) flows in the upper left direction in FIG. 4 along the baffle plate by the four baffle plates (31). A part of the air flow abuts on the baffle plate (31), then bends to the right, passes through a gap between the adjacent baffle plates (31), and then heads to the outlet (16b).

    Note that, when air is blown out from the blower fan (7), a blowing sound that contributes to noise is generated. However, since the box (16) has the silencing mechanism (30), the blowing sound can be reduced by the silencing mechanism (30). Specifically, the sound wave incident on the inside of the box (16) is reflected by the baffle plate (31) and absorbed by the silencer member (32) attached to the inner surface of the box (16). In addition, the sound wave incident on the inside of the box (16) is reflected by the baffle plate (31), interferes and attenuates. In the box (16), the air blown out from the blower fan (7) can be smoothly guided to the outlet (22) and the blowing sound can be reduced.

    The air reaching the outlet (16b) is supplied into the room through a duct (not shown) from the outlet (22) of the top panel (2e) of the casing (2) to which the outlet (16b) is connected.

-Effect of Embodiment 1-
As described above, in the air conditioner (1), a plug fan having high static pressure efficiency is used as the blower fan (7), the impeller (8a) is covered with the housing (10), and the blown air is supplied to the box (16 ) Through the outlet (22) of the casing (2). Therefore, the inside (inflow side space (S1) and outflow side space (S2)) of the casing (2) can be in a negative pressure state in which the pressure is lower than the outside. Thereby, internal air can be prevented from leaking outside through the gap between the outer wall panels of the casing (2). As a result, air after temperature adjustment in the cold water coil (4) or hot water coil (5) can be sent out from the outlet (22) toward the supply destination such as the room without leaking outside the casing (2). . Therefore, the static pressure efficiency of the air conditioner (1) can be improved.

    In addition, as described above, since the inside of the casing (2) is in a negative pressure state, there is no possibility that the temperature-adjusted air leaks to the outside of the casing (2), so the three front panels ( 2a) can be constituted by a door that can be rotated around a vertical axis without being fixed with screws or the like. Therefore, maintenance of the internal device can be easily performed by opening the front panel (2a) formed on the door.

    Furthermore, according to the air conditioner (1), noise can be reduced. Specifically, since the impeller (8a) of the blower fan (7) is covered by the housing (10), the noise of the fan itself leaks outside the casing (2) due to the transmission loss of the housing (10). Can be suppressed. Further, by providing the housing (10), it is possible to prevent the casing (2) from vibrating due to the blown air of the blower fan (7) hitting the inner surface of the casing (2). Therefore, noise can be reduced by preventing generation of vibration noise.

    Moreover, according to the said air conditioning apparatus (1), when a box (16) is comprised in the silencer which has a silencing mechanism (30), when it blows off from an air blower fan (7), it produces noise. The blowing sound that contributes to the noise can be reduced by the silencing mechanism (30). Therefore, noise generated in the air conditioner (1) can be further reduced.

    In the air conditioner (1), a pair of parallel plate-like members (front plate (18a), rear plate (18b)) of the box (16) having the silencing mechanism (30) are connected to the upper panel (2e). The pair of plate-like members (18a, 18b) are respectively fixed to the upper panel (2e) and the left panel (2c) because they are fixed to the left panel (2c) vertically connected to the upper panel (2e). It can function as a brace that is stretched over. That is, when an external force is applied that deforms the corner (51) formed by the top panel (2e) and the left panel (2c), the pair of plate members (18a, 18b) are connected to both panels (2c). , 2e) or by pulling the two panels (2c, 2e), the corner (51) can be reinforced to suppress deformation of the corner (51). Thereby, a deformation | transformation of a casing (2) can be suppressed.

    In the casing (2) which is assembled and used as a structural member in a box shape rather than being fixed to the frame as a simple exterior material as in the first embodiment, the corners are particularly deformed. It becomes easy to do. Therefore, in such a casing (2), the above effect becomes more remarkable.

    In addition, the reinforcement member of the casing (2) as described above is configured by the box (16) having the silencer mechanism (30) without providing a separate structural member, thereby suppressing an increase in the size of the apparatus. it can.

<< Embodiment 2 of the Invention >>
As shown in FIG. 5, in the second embodiment, the structure of the box (16) of the first embodiment is partially changed, and the silencer mechanism (30) is configured on the so-called resonance side.

    Specifically, as in the first embodiment, the box (16) includes a front plate (18a) and a rear plate (18b) that are a pair of parallel rectangular plate members, and the front plate (18a) and It has a left plate (18c) and a right plate (18d), which are rectangular plate-like members that extend vertically to the rear plate (18b). In the second embodiment, the box (16) does not have a bottom plate. On the other hand, the box (16) has an inner left plate (18f) and an inner right plate (18g) which are rectangular plate-like members vertically spanned by the front plate (18a) and the rear plate (18b). ing.

    The inner left plate (18f) and the inner right plate (18g) are a space surrounded by the front plate (18a), the rear plate (18b), the left plate (18c), and the right plate (18d). It is partitioned into three spaces, (P1) and two outer spaces (33) that sandwich the air flow path (P1). At the inlet end of the air flow path (P1), the front plate (18a), the rear plate (18b), the inner left plate (18f) and the inner right plate (18g) are connected to the outlet (10i). A mouth (16a) is formed. On the other hand, the outflow end of the air flow path (P1) is connected to the outlet (22) by the front plate (18a), the rear plate (18b), the inner left plate (18f), and the inner right plate (18g). And a lead-out port (16b).

    The inner left plate (18f) and the inner right plate (18g) are both inclined from the vertical direction so that the flow passage cross-sectional area of the air flow passage (P1) gradually increases toward the downstream side. Also, a large number of small holes (34) of about 100 to 200 are formed in the inner left plate (18f) and the inner right plate (18g), respectively. In the present embodiment, the small hole (34) is formed to have a diameter of about 10 mm.

    Further, a silencing member (32) such as glass wool is attached to the inner surfaces of the front plate (18a) and the rear plate (18b). In the second embodiment, the silencing member (32), the outer space (33), and the small hole (34) constitute the silencing mechanism (30) according to the present invention.

    Further, also in the second embodiment, the front plate (18a) and the rear plate (18b) of the box (16) are the same as in the first embodiment, and the upper panel (2e) and the left panel (2c) of the casing (2). It is fixed to.

    With the configuration as described above, the second embodiment can achieve the same effects as those of the first embodiment.

    In the second embodiment, the box (16) is formed so that the cross-sectional area of the air flow path (P1) gradually increases toward the downstream side. The air blown out from 7) can be prevented from swirling, and the pressure loss can be reduced.

    Also in Embodiment 2, since the box (16) has the silencing mechanism (30), the blowing sound generated when air is blown from the blower fan (7) is caused by the silencing mechanism (30). Can be reduced. Specifically, the blowing sound can be reduced by absorbing the sound generation member (32) attached to the inner surfaces of the front plate (18a) and the rear plate (18b). In addition, a large number of small holes (34) are formed in each of the inner left plate (18f) and the inner right plate (18g) forming the air channel (P1), and the outer space ( By forming 33), the outer space (33) becomes a resonance space, and sound waves incident on the air flow path (P1) of the box (16) interfere with each other and attenuate. Also by this, the blowing sound can be reduced.

<< Embodiment 3 of the Invention >>
As shown in FIG. 6, in Embodiment 3, the structure of the blower fan (7) and the box (16) of Embodiment 1 is partially changed, and the blower fan (7) is configured as a so-called lower blower fan. It is.

    Specifically, the box-shaped main body (10a) of the housing (10) is formed so that the lower end surface is opened, and the cylindrical rectifying section (10b) is connected to the lower end of the main body (10a). Yes.

    A box (16) is provided below the blower fan (7), an air inlet (16a) is formed on the upper surface, and an air outlet (16b) is formed on the lower surface. The introduction port (16a) is connected to the air outlet of the housing (10) (the lower surface opening of the rectification unit (10b)), while the outlet port (16b) is formed in the base (2f) of the casing (2) Connected to the outlet (22).

    Similarly to the first embodiment, the box (16) includes a front plate (18a) and a rear plate (18b) which are a pair of parallel rectangular plate-like members, and the front plate (18a) and the rear plate (18b). A left plate (18c) and a right plate (18d), which are rectangular plate-like members that are vertically stretched between the two. In the third embodiment, the box (16) does not have a bottom plate. On the other hand, the box (16) has an upper plate (18h), and the introduction port (16a) is formed in the upper plate (18h). Further, in Embodiment 3, the left plate (18c) is viewed from the vertical direction so that the cross-sectional area of the air flow path (P1) formed by the box (16) is gradually enlarged toward the downstream side. Inclined.

    The front plate (18a) and the rear plate (18b) of the box (16) are fixed to the left panel (2c) and the base (2f), respectively.

    In this embodiment, the front plate (18a) has the left side surface (42) fixed to the left side panel (2c), the lower surface (43) fixed to the base (2f), and the right side surface (44) fixed to the column ( 2g). Similarly, the rear plate (18b) has the left side (42) fixed to the left side panel (2c), the lower surface (43) fixed to the base (2f), and the right side (44) fixed to the column (2h). Has been.

    As described above, the front plate (18a) and the rear plate (18b), which are a pair of parallel plate-like members of the box (16), have the left side surface (42) fixed to the left side panel (2c) and the bottom surface. By fixing (43) to the base (2f), the corner portion (62) formed therebetween is reinforced so as not to be deformed.

    In this embodiment, the front plate (18a) has a lower surface (43) fixed to the base (2f) and the right side surface (44) fixed to the support column (2g). The part (63) is reinforced to prevent deformation. Similarly, the rear plate (18b) has a lower surface (43) fixed to the base (2f) and a right side surface (44) fixed to the support column (2h). 63) is reinforced to prevent deformation.

    Moreover, although illustration is abbreviate | omitted, the silencer mechanism (30) similar to Embodiment 1 is provided in the inside of the box (16).

    In the third embodiment, the cooling operation and the heating operation are performed in the same manner as in the first embodiment, and the air blown out from the blower fan (7) passes through the box (16), and the base (2f) of the casing (2). ) Is blown into an air passage (not shown) formed in the floor where the air conditioner (1) is installed, and is supplied to a supply destination such as a room through the air passage. .

    Even with such a configuration, the same effects as those of the first embodiment can be obtained. Also in the third embodiment, the box (16) is formed so that the flow path cross-sectional area of the internal air flow path (P1) gradually increases, so that the air blown from the blower fan (7) swirls. This can be suppressed and pressure loss can be reduced.

<< Other Embodiments >>
About the said embodiment, it is good also as the following structures.

    In the air conditioner (1) having the so-called top blow type blower fan (7) of the first embodiment, as in the third embodiment, the box (16) is disconnected from the internal air flow path (P1). Of course, the area may be gradually increased.

    In the first and third embodiments, the same effect can be obtained even if the muffler mechanism (30) is configured in a splitter type or a cell type.

    In addition, the above embodiment is an essentially preferable illustration, Comprising: It does not intend restrict | limiting the range of this invention, its application thing, or its use.

    As described above, the present invention is useful for an air conditioner.

1 Air conditioner
2 Casing
2c Left panel (first panel)
2d Top panel (second panel)
4 Cold water coil (heat exchanger)
5 Hot water coil (heat exchanger)
7 Blower fan (plug fan)
10 Housing
10h inlet
10i outlet
16 box
18a Front plate
18b rear plate
21 Inlet
22 Outlet
30 Silencer mechanism
P1 Air channel

Claims (2)

A plug fan (7), a heat exchanger (4, 5) through which air flowing by the plug fan (7) passes, an air inlet (21) and an outlet (22) are formed, and the interior An air conditioner having a casing (2) provided with the plug fan (7) and the heat exchanger (4, 5).
The plug fan (7) has a housing (10) in which an inlet (10h) and an outlet (10i) are formed,
In the casing (2), an air flow path (P1) connected to the outlet (10i) and the outlet (22) to guide the outlet air of the plug fan (7) to the outlet (22). ) And a box (16) configured in a silencer having a silencer mechanism (30) ,
The casing (2) has a first panel (2c) and a second panel (2e) connected vertically,
The box (16) includes a pair of parallel plate members (18a, 18b) fixed to the first panel (2c) and the second panel (2e), respectively. > An air conditioner characterized by that. In claim 1 ,
The air conditioner characterized in that the box (16) is formed such that the cross-sectional area of the air flow path (P1) gradually increases toward the downstream side.

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