JP2018204829A - Duct type air conditioner - Google Patents

Abstract

To achieve uniform wind speed distribution to a heat exchanger, in particular, wind speed distribution in a vertical direction, in an air conditioner in which air is blown to the heat exchanger from a blower.SOLUTION: In a duct-type air conditioner which includes a rectangular parallelepiped housing 10 having an air suction port 10A at one face side and an air blowout port 10B at the other face side, and in which the inside of the housing 10 is divided into a blower chamber 30 provided with a blower (sirocco fan) 31 at an air suction port 10A side and a heat exchanger chamber 40 provided with a heat exchanger 41 at an air blowout port 10B side by a partitioning plate 20, and a heat exchanger portion 42 inclined upward from an air blowout port 10B side toward a partitioning plate 20 side and having an upper end portion 42a disposed along a top plate 401 of the housing, is included in the heat exchanger 41, a supporting tool 50 supporting an upper end portion 42a of the heat exchange portion 42 and mounted on the top plate 401 is disposed, and the supporting tool 50 is provided with a wind guide portion 54 for making a part of the air blown into the heat exchanger chamber 40 from the blower 31 direct to an upper region of the heat exchange portion 42.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a duct-type air conditioner that includes a heat exchanger room and a fan room and is installed in a ceiling or the like. More specifically, the present invention relates to a technique for improving a wind speed (air volume) distribution in a heat exchanger room. It is.

  As shown in FIG. 5, many of the duct type air conditioners 1 </ b> B include a rectangular parallelepiped casing 10. An air inlet 10A is provided on one surface side (right side in FIG. 5) of the housing 10, and an air outlet 10B is provided on the other surface side (left side in FIG. 5) opposite to the one surface side. .

  The interior of the housing 10 is partitioned by a partition plate 20 into a blower chamber 30 on the air inlet 10A side and a heat exchanger chamber 40 on the air outlet 10B side. A blower 31 is accommodated in the blower chamber 30. A heat exchanger 41 and a drain pan 45 are accommodated in the heat exchanger chamber 40.

  In this conventional example, the heat exchanger 41 connects one end portions 42a, 43a of two flat plate heat exchangers 42, 43 with a predetermined connector on the side of the air outlet 10B, as viewed from the side (FIG. In FIG. 5, it is formed in a U shape.

  With the upper heat exchanger 42 as the upper heat exchanger and the lower heat exchanger 43 as the lower heat exchanger, the upper heat exchanger 42 has the other end 42b approaching the top plate 401 of the heat exchanger chamber 40. The lower heat exchanging portion 43 is inclined downward so that the other end portion 43 b approaches the drain pan 45.

  In the heat exchanger 41 having such a configuration, the connecting portion between the one end portion 42a of the upper heat exchange portion 42 and the one end portion 43a of the lower heat exchange portion 43 is connected to the center portion 41a of the heat exchanger 41 and the upper heat exchange portion 42. The end 42b may be referred to as the upper end of the heat exchanger 41, and the other end 43b of the lower heat exchange 43 may be referred to as the lower end of the heat exchanger 41.

  Although not shown, the duct-type air conditioner 1B is installed in the ceiling (attic), and the air inlet 10A is connected to an air inlet grill provided on the ceiling surface via the inlet duct, and the air outlet 10B. Is connected to an air blowing grill provided on the ceiling surface through a blowing duct.

  Due to the operation of the blower 31, the room air flows from the air suction grille → suction side duct → blower room 30 → heat exchanger room 40 → blowout side duct → air blowout grill to the heat exchanger 41 in the heat exchanger room 40. The conditioned air generated by heat exchange with the refrigerant is returned to the room from the air blowing grill.

  The duct type air conditioner 1B is an air blowing type in which the blower 31 is disposed on the upstream side of the heat exchanger 41 and air is blown from the blower 31 to the heat exchanger 41. In order to increase the exchange efficiency, it is preferable that the wind speed distribution of the air (wind) hitting the entire heat exchanger 41 is uniform.

  As described in Patent Document 1, in a duct type air conditioner, a sirocco fan is usually employed for the blower 31. The sirocco fan is a type of centrifugal blower having a scroll casing, and the wind is concentrated and blown out toward a part of the heat exchanger 41 from the blower opening of the scroll casing.

  As described above, according to the sirocco fan, the wind is concentrated and blown out toward the part of the heat exchanger 41 from the air outlet of the scroll casing, so the wind speed distribution of the wind hitting the heat exchanger 41 is not uniform. In particular, since the heat exchanger 41 becomes large when it becomes a large duct type air conditioner, as schematically shown in FIG. 5, the central portion 41a, the upper end portion 42b, and the lower end portion 43b of the heat exchanger 41 The wind speed of the central portion 41a is fast, whereas the wind speed of the upper end portion 42b and the lower end portion 43b is extremely slow, resulting in a large difference in the wind speed distribution and deterioration of heat exchange efficiency.

  In Patent Document 2, a rectifying plate is provided in a blower opening of a scroll casing of a sirocco fan so that air is distributed over the entire upstream side (air inflow side) surface of the heat exchanger to improve heat exchange efficiency. Has been proposed.

  However, since the rectifying plate is provided so as to deflect (diffuse) the air blown out from the air blowing port in the left-right direction, the center portion 41a, the upper end portion 42b, and the lower end portion 43b of the heat exchanger 41 still remain. A difference occurs in the wind speed distribution.

Japanese Patent Laid-Open No. 2006-8730 Japanese Patent Laid-Open No. 2006-160780

  Accordingly, an object of the present invention is to provide a duct-type air conditioner in which air is blown from a blower in a blower chamber to a heat exchanger in a heat exchanger chamber, and a uniform wind speed distribution in the vertical direction, particularly in the vertical direction. It is to measure.

In order to solve the above problems, the present invention includes a rectangular parallelepiped housing having an air suction port on one surface side and an air outlet on the other surface side, and the inside of the housing is separated by a partition plate. It is divided into a blower chamber on the air inlet side and a heat exchanger chamber on the air outlet side, a blower is disposed in the blower chamber, a heat exchanger is disposed in the heat exchanger chamber, The partition plate is formed with a blowing window into which the blower outlet of the blower is fitted, and the heat exchanger is inclined upward from the air outlet side toward the partition plate side, and the upper end portion is the heat exchanger. In a duct-type air conditioner having a heat exchange part arranged along the top plate provided in the chamber,
A support member that supports the upper end of the heat exchange unit and is attached to the top plate; and the support member includes a part of air blown from the blower into the heat exchanger chamber through the blower window. It is characterized in that an air guide part is provided to direct the air toward the upper part of the heat exchange part.

  According to a preferred aspect of the present invention, the air guide portion is disposed at a position facing the air blowing window.

  Moreover, the said air guide part is provided with the opening part for ventilation, and the airflow guide plate which orient | assigns the air which passes the said opening part to the said heat exchange part side.

  In the present invention, the heat exchanging portion is an upper heat exchanging portion, and the heat exchanger is inclined downward from the air outlet side toward the partition plate side and is seen in a side view along with the upper heat exchanging portion. A sirocco fan having a scroll casing is used for the blower, and in this aspect, the air blowing direction of the sirocco fan is directed to the lower heat exchange part side. Good.

  According to the present invention, the air guide part that supports the upper end of the heat exchanging part and is attached to the top plate, and directs a part of the air blown from the blower into the heat exchanger room toward the upper part of the heat exchanging part. Is provided, it is possible to equalize the wind speed distribution with respect to the heat exchanger, particularly the wind speed distribution in the vertical direction.

The sectional view showing typically the internal structure of the duct type air conditioner concerning one embodiment of the present invention. (A) The perspective view seen from the front upper direction of the support tool with which the said duct type air conditioner is equipped, (b) The perspective view seen from the back upper surface. Sectional drawing along the AA line of Fig.2 (a) of the said support tool. The exploded perspective view of FIG. Typical sectional drawing which shows the internal structure of the duct type air conditioner as a prior art example.

  Next, an embodiment of the present invention will be described with reference to FIGS. 1 to 4, but the present invention is not limited to this.

  First, referring to FIG. 1, a duct type air conditioner 1A according to this embodiment is an indoor unit installed behind a ceiling, and is the same as the duct type air conditioner 1B described in FIG. 5 as a conventional example. A rectangular parallelepiped casing 10 is provided.

  The housing 10 is provided with an air inlet 10 on one side (right side in FIG. 1) of the opposing surfaces, and an air outlet 10B on the other side (left side in FIG. 1). . 10A of air suction inlets are connected with the air suction grille provided in the ceiling surface via the suction side duct which is not shown in figure, and the air blower outlet 10B is similarly provided in the ceiling surface via the ventilation side duct which is not shown in figure. Connected with air blowing grille.

  The interior of the housing 10 is partitioned by a partition plate 20 into a blower chamber 30 on the air inlet 10A side and a heat exchanger chamber 40 on the air outlet 10B side.

  A sirocco fan 31 is disposed in the blower chamber 30 as a blower. The sirocco fan 31 is a kind of centrifugal blower having a multi-blade cylinder (multi-blade fan) 33, and the multi-blade cylinder 33 is accommodated in a scroll casing 32.

  Referring also to FIG. 4, an air suction port 32 a is provided on the side surface of the scroll casing 32, and air is sucked from the air suction port 32 a by the rotation of the multi-blade cylindrical body 33, and the air blowing port of the scroll casing 32. From 32b, the air is concentrated and blown toward a part of the heat exchanger 41 disposed in the heat exchanger chamber 40.

  In this embodiment, two sirocco fans 31 are provided. Each sirocco fan 31 is juxtaposed along the partition plate 20 so that the rotation axis of the multi-blade cylindrical body 33 exists on the same straight line.

  The partition plate 20 is formed with an air blowing window 21 into which the air blowing port 32b of the sirocco fan 31 is fitted. In this embodiment, since there are two sirocco fans 31, correspondingly, the blowing windows 21 are also provided at two locations.

  A heat exchanger 41 and a drain pan 45 are arranged in the heat exchanger chamber 40. The heat exchanger chamber 40 is provided with a top plate 401 on the upper surface, and the drain pan 45 is disposed on the bottom 402 facing the top plate 401 of the heat exchanger chamber 40.

  Also in this embodiment, the heat exchanger 41 includes two flat plate heat exchangers 42 and 43, and the one end 42a of the heat exchanger 42 and the one end 43a of the heat exchanger 43 are connected to the air outlet 10B side. Are connected to each other with a predetermined connecting tool, and are formed in a letter-like shape when viewed from the side.

  The upper heat exchanger 42 is the upper heat exchanging part, the lower heat exchanger 43 is the lower heat exchanging part, and the height direction of the upper surface and the bottom surface of the heat exchanger chamber 40 is the upper and lower direction. Is inclined upward so that the other end portion 42 b approaches the top plate 401 of the heat exchanger chamber 40, and the lower heat exchange portion 43 is inclined downward so that the other end portion 43 b approaches the drain pan 45.

  Also in the description here, the connecting portion of the one end portion 42a of the upper heat exchanging portion 42 and the one end portion 43a of the lower heat exchanging portion 43 is connected to the central portion 41a of the heat exchanger 41 and the other end portion 42b of the upper heat exchanging portion 42 is used. The upper end portion of the heat exchanger 41 and the other end portion 43b of the lower heat exchange portion 43 may be referred to as the lower end portion of the heat exchanger 41.

  Referring also to FIG. 4, the heat exchanger 41 includes support brackets 410 and 410 at both left and right ends thereof, and is housed in the heat exchanger chamber 40 while being supported by the support brackets 410 and 410. The heat exchanger 41 includes a pipe connector 420 on one end side thereof, and is connected to an outdoor unit (not shown) via the pipe connector 420.

  Due to the operation of the sirocco fan 31, the indoor air flows from the air suction grille → the suction side duct → the blower room 30 → the heat exchanger room 40 → the blowout side duct → the air blowout grill, and the heat exchanger 41 in the heat exchanger room 40. The conditioned air heat-exchanged at is returned to the room from the air blowing grill.

  In the sirocco fan 31, the air is concentrated and blown out from the air blowing port 32 b of the scroll casing 32 toward a part of the heat exchanger 41. For this reason, a big difference arises in wind speed distribution by the center part 41a and the upper end part 42b of the heat exchanger 41, and heat exchange efficiency deteriorates.

  Further, since the heat exchanger 41 becomes large in particular when it becomes a large duct type air conditioner, the upper end portion (the other end portion of the upper heat exchange portion 42) 42b of the heat exchanger 41 due to, for example, a drop impact at the time of transportation or the like. The central portion of the heat exchanger may be greatly bent, and a gap may be formed between the heat exchanger chamber 40 and the top plate 401, and air leakage that does not pass through the heat exchanger 41 may occur from the gap.

  Therefore, in the present invention, a support 50 that supports the upper end portion 42 b of the heat exchanger 41 and is attached to the top plate 401 is provided.

  Referring to FIGS. 2 and 3, mounting member 51 having screw insertion hole 511 and screwed to top plate 401 and upper end portion 42 b of heat exchanger 41 are placed on support 50. A receiving part 52 and an air guide part 54 for directing a part of the air blown from the sirocco fan 31 into the heat exchanger chamber 40 toward the upper end part 42 b of the heat exchanger 41 are provided.

  In this embodiment, the support tool 50 is made of sheet metal, and integrally includes a mounting substrate portion 51, a receiving portion 52, and an air guide portion 54. The air guide portion 54 is an opening for ventilation formed by punching a metal plate. 541 and a cut-and-raised tongue-shaped airflow guide plate 542 formed in accordance with the punching of the opening 541.

  According to this support 50, since the upper end portion 42b of the heat exchanger 41 is supported by the receiving portion 52, the upper end portion 42b of the heat exchanger 41 is bent and the top plate is bent even if, for example, it receives a drop impact during transportation. There is no gap between the terminal 401 and the terminal 401. The upper end portion 42b of the heat exchanger 41 may be fixed to the receiving portion 52 with screws or the like. In addition, the lower end part 43a of the lower heat exchange part 43 is mounted on it using the drain pan 45 as a support tool.

  In addition, since a part of the air blown from the sirocco fan 31 into the heat exchanger chamber 40 is directed toward the upper end portion 42b of the heat exchanger 41 by the airflow guide plate 542, the central portion 41a and the upper end of the heat exchanger 41 are moved. There is no significant difference in the wind speed distribution between the portion 42b.

  In order to make the air velocity distribution in the vertical direction of the heat exchanger 41 more uniform, the air blowing direction of the sirocco fan 31 may be directed toward the lower heat exchange unit 43 side. For this purpose, for example, the sirocco fan 31 may be rotated counterclockwise in FIG.

  According to this, while the wind speed on the lower heat exchanging portion 43 side, which has been assumed to have been lowered until now, is increased, the wind speed on the upper heat exchanging portion 42 side is relatively lowered, but on the upper heat exchanging portion 42 side. Since the airflow guide plate 542 compensates for the drop in the wind speed, the wind speed distribution in the vertical direction of the heat exchanger 41 is made uniform as a whole.

  As shown in FIG. 4, in this embodiment, the support tool 50 is disposed at two locations corresponding to the ventilation window 21 formed in the partition plate 20, but the support tool 50 is arranged at the full width of the heat exchanger 41. The entire upper end portion 42a of the heat exchanger 41 may be supported as a length extending over. On the contrary, only the center part of the upper end part 42b of the heat exchanger 41 may be supported by the support 50.

  In any case, when the support tool 50 is disposed at a location with a high wind speed facing the ventilation window 21, the support tool 50 is separated from the partition plate 20 toward the air outlet 10B in order to easily change the wind direction. It is preferable to provide at a position where the wind speed gradually decreases at a certain position.

  In the said embodiment, the heat exchanger 41 is formed in the shape of the character which looks at the side view by connecting each one end part 42a, 43a of two flat heat exchangers 42, 43 with a predetermined | prescribed connection tool. However, only the upper heat exchanger (upper heat exchanging portion) 42 is used as the heat exchanger 41, and the upper end portion of the heat exchanger 42 leans obliquely from the air outlet 10B toward the partition plate 20 side. The aspect arrange | positioned along the top plate 401 of the heat exchanger chamber 40 may be sufficient as 42b.

DESCRIPTION OF SYMBOLS 1A Duct type air conditioner 10 Case 10A Air inlet 10B Air outlet 20 Partition plate 21 Ventilation window 30 Blower chamber 31 Blower 31 Sirocco fan 32 Scroll casing 32a Air inlet 32b Air outlet 33 Multi-blade cylinder 40 Heat exchanger Chamber 401 Top plate 41 Heat exchanger 41a Central part 42 Upper heat exchange part 42a One end part of upper heat exchange part 42b The other end part of the upper heat exchange part (upper end part of heat exchanger)
43 lower heat exchange part 43a one end part of lower heat exchange part 43b other end part of lower heat exchange part (lower end part of heat exchanger)
45 Drain pan 50 Support 51 Mounting board part 52 Receiving part 54 Air guide part 541 Opening part 542 Airflow guide plate

Claims (4)

A rectangular parallelepiped housing having an air suction port on one surface side and an air outlet on the other surface side, and the inside of the housing is separated from the fan chamber on the air suction port side and the air by a partition plate It is divided into a heat exchanger chamber on the outlet side, a blower is disposed in the blower chamber, a heat exchanger is disposed in the heat exchanger chamber, and a blower opening of the blower is fitted in the partition plate. A blower window is formed, the heat exchanger is inclined upward from the air outlet side toward the partition plate side, and an upper end portion is arranged along a top plate provided in the heat exchanger chamber. In a duct type air conditioner having a heat exchange part
A support member that supports the upper end of the heat exchange unit and is attached to the top plate; and the support member includes a part of air blown from the blower into the heat exchanger chamber through the blower window. A duct type air conditioner characterized in that an air guide part is provided for directing air toward the upper part of the heat exchange part.   The duct type air conditioner according to claim 1, wherein the air guide portion is disposed at a position facing the air blowing window.   The duct type air according to claim 1 or 2, wherein the air guide section includes an opening for ventilation and an airflow guide plate for directing air passing through the opening toward the heat exchange section. Harmony machine.   The heat exchanger is an upper heat exchange part, and the heat exchanger is inclined downward from the air outlet side toward the partition plate side and exhibits a letter shape in a side view with the upper heat exchange part. The sirocco fan which has a scroll casing is used for the said air blower, The air blowing direction of the said sirocco fan is orient | assigned to the said lower heat exchange part side, The any one of Claim 1 thru | or 3 characterized by the above-mentioned. A duct type air conditioner according to claim 1.

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