JP2016223679A - Duct type air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a duct type air conditioner which enhances heat exchange efficiency by improving non-uniform wind speeds attributable to an installation place of a fan motor and thereby curbing generation of abnormal noise.SOLUTION: In a duct type air conditioner, an inside of a housing 10 is separated, by a partition plate, into a heat exchanger chamber HC to store a heat exchanger and a blower chamber FC to store a blower unit. The duct type air conditioner has air guiding means 30 (a first and a second air guiding units 30a and 30b) which guides a portion of air, blown toward a side of the heat exchanger chamber HC through a communication hole 26 communicating the blower chamber FC with the heat exchanger chamber HC, into a space A between a first and a second communication holes 26a and 26b next to the fan motor 161.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a duct type air conditioner housed in a space formed between a ceiling slab and a ceiling panel, and more specifically, a technique for rectifying an air flow blown from a blower toward a heat exchanger. About.

  As one of the air conditioners, there is a duct type air conditioner (see, for example, Patent Document 1). As shown in FIG. 10, the duct type air conditioner 1 </ b> A has an indoor unit 2 in which a heat exchanger 3 and a blower 4 are housed, and the indoor unit 2 includes a ceiling slab S, a ceiling panel P, and Is suspended and held via a suspension bolt B in the space formed between the two.

  When installing the duct type air conditioner 1, an air suction grille 5 and an air outlet grille 7 are provided at predetermined locations on the ceiling panel P, and an air suction port (on the right side in FIG. The air suction grille 5 is connected to the surface side) via the suction duct 6, and the air blowout is performed via the air duct 8 and the blowout chamber device 9 at the air blowout port on the heat exchanger 3 side (left side surface side in FIG. 10). A grill 7 is connected.

  Accompanying the operation of the blower 4, room air is sucked from the air suction grille 5, led to the indoor unit 2 through the suction duct 6, and heat exchanged with the refrigerant in the heat exchanger 3, and the heat exchange is performed. Air (cold air or warm air) is blown out from the air blowing grill 7 into the room through the air duct 8 and the blowing chamber device 9.

  According to this duct type air conditioner 1, the ceiling panel P is provided only with the air suction grille 5 and the air blowout grille 7, and the ducts such as the indoor unit 2, the suction duct 6, and the air duct 8 are provided on the ceiling panel. Since it is hidden by P, the beauty of the ceiling surface can be improved.

JP 2010-117110 A

  Referring also to FIG. 11, in this type of duct-type air conditioner 1, the inside of the housing of the indoor unit 2 includes a heat exchanger chamber 3 </ b> A in which the heat exchanger 3 is accommodated by a partition plate 2 </ b> A, and a blower 4. The fan 4 is divided into a fan chamber 41 having two output shafts 41a and 41b drawn in opposite directions and connected to the output shafts 41a and 41b. The sirocco fan 42 is provided.

  In the illustrated example, there are four sirocco fans 42a to 42d, one of which is connected to one output shaft (right side in FIG. 11) 41a of the fan motor 41, and the remaining three units 42b to 42d are connected. The other output shaft (left side in FIG. 11) 41b is connected coaxially.

  Each sirocco fan 42 (42a to 42d) is disposed along the partition plate 2A, and although not shown in detail, the partition plate 2A is provided with a communication hole for each sirocco fan 42, Air blown out by each sirocco fan 42 is supplied from the communication holes toward the heat exchanger chamber 3 </ b> A, and heat exchange with the refrigerant is performed in the heat exchanger 3.

  By the way, of the communication holes provided in the partition plate 2A, two communication holes (communication holes for the sirocco fan 42a and communication holes for the sirocco fan 42b in the example of FIG. 11) disposed on both sides of the fan motor 41 are provided. The interval is wider than the interval between the other communication holes by the installation space of the fan motor 41.

  Therefore, as shown in FIG. 11, when the heat exchanger 3 is disposed near the partition plate 2A, the air blown into the heat exchanger chamber 3A from each communication hole hits the heat exchanger 3 before spreading. Therefore, the air flowing through the space A (portion indicated by hatching in FIG. 11) corresponding to the fan motor 41 with the partition plate 2A interposed therebetween is less than other portions, and the wind speed is nonuniform.

  Moreover, a part of the blown air cannot pass through the heat exchanger 3 and may flow along the surface of the heat exchanger 3 as indicated by an arrow F in FIG. When such a phenomenon occurs, not only the heat exchange efficiency is lowered, but also a wind noise (for example, an abnormal noise similar to a whistle blowing sound such as “Hülhur”) may occur.

  Accordingly, an object of the present invention is to provide a duct type air conditioner that improves the nonuniformity of the wind speed due to the installation space of the fan motor and increases the heat exchange efficiency. Furthermore, it is providing the duct type air conditioner which suppressed generation | occurrence | production of unusual noise.

  In order to solve the problems described above, the present invention includes a rectangular parallelepiped housing having an air outlet on the front surface and an air suction port on the rear surface, and the inside of the housing includes a heat exchanger by a partition plate. It is partitioned into a heat exchanger chamber on the air outlet side to be housed and a fan chamber on the air inlet side in which the air blower unit is housed. The fan unit has a fan motor having an output shaft and the fan. A blower fan connected to the output shaft of the motor and disposed along the partition plate, and the partition plate communicates with the blower fan in communication with the blower chamber and the heat exchanger chamber. In the duct type air conditioner provided with holes, a part of the air flow blown from the blower fan toward the heat exchanger is passed through the communication hole located next to the fan motor. Above the board Air guide means for the branched airflow blown toward the Anmota facing the space is characterized by is provided.

  As a more preferable aspect, the fan motor has output shafts at both ends, the blower fans are attached to the output shafts, and the communication plate is provided with a plurality of communication holes for each of the blower fans.

  As a more preferred aspect, the air guide means includes a base plate having an opening communicating with a part of the communication hole, and guide fins erected in parallel from both sides of the opening of the base plate. The flow path of the branched air flow is formed by the guide fins.

  According to the present invention, a part of the air flow blown from the blower fan toward the heat exchanger is guided as a branched air flow that blows out toward the space facing the fan motor with the partition plate interposed therebetween. By providing the wind means, it is possible to improve the nonuniformity of the wind speed due to the installation space of the fan motor and increase the heat exchange efficiency, and to suppress the generation of abnormal noise such as whistling noise.

The bottom side perspective view showing the indoor unit with which the duct type air conditioner concerning a 1st embodiment of the present invention is provided. The bottom side perspective view which shows the state which removed the heat exchanger chamber bottom plate and the air blower chamber bottom plate from the said indoor unit. The disassembled perspective view which shows the state which looked at the air blower room side from the heat exchanger room side. The partial expansion perspective view which expanded the circumference | surroundings of the 1st communicating hole and 2nd communicating hole of FIG. The (a) front view, (b) back view, and (c) AA sectional view of a 1st wind guide unit. The (a) front view, (b) rear view, and (c) BB line sectional view of the 2nd wind guide unit. The bottom view which shows the state which removed the top plate from the said indoor unit. The schematic diagram which shows the preferable blowing angle of the branched airflow by a wind guide unit. The schematic diagram explaining the structure of the duct type air conditioner which concerns on 2nd Embodiment of this invention. The schematic diagram explaining the structure of the conventional duct type air conditioner. The top view which shows the state which removed the top plate in the said conventional duct type air conditioner.

  Next, a first embodiment of the present invention will be described with reference to FIGS. 1 to 8, but the present invention is not limited to this.

  As shown in FIG. 1, an indoor unit 2 of a duct type air conditioner according to a first embodiment of the present invention includes a rectangular parallelepiped housing 10. The casing 10 is opposite to the rectangular top plate 11, side plates 12 a and 12 b provided so as to be substantially perpendicular to both sides of the top plate 11, and the top plates 11 of the side plates 12 a and 12 b. The heat exchanger chamber bottom plate 13 and the blower chamber bottom plate 14 are provided between the side ends, and the front side and the rear side are open. In addition, the assembly of the housing | casing 10 makes the top plate 11 the bottom, assembles each component mentioned later, and finally assembles the heat exchanger chamber bottom plate 13 and the fan chamber bottom plate 14. When installing, the top plate 11 is turned upside down so that the top plate 11 faces up. Therefore, for convenience of explanation, the casing 10 is shown upside down in FIG. 1 (the same applies to FIG. 2).

  Referring also to FIG. 2, the housing 10 is partitioned into a heat exchanger chamber HC that houses the heat exchanger 15 and a blower chamber FC that houses the blower unit 16 by the partition plate 20. An air outlet 17 for blowing out conditioned air is formed on the front surface 10a of the housing 10 on the heat exchanger chamber HC side, and room air is taken into the housing 10 on the rear surface 10b on the fan chamber FC side. An air inlet 18 is formed.

  As shown in FIG. 10, the casing 10 has a ceiling slab S and a ceiling panel P, with the top plate 11 as the upper side and the heat exchanger chamber bottom plate 13 and the blower chamber bottom plate 14 as the lower side (bottom side). The air suction port 18 and the air suction grille 5 are connected via the intake duct 6, and the air blowout port 17 and the air blowout grille 7 are connected to the blower duct 8. And a blow-out chamber device 9. Although not shown, the indoor unit 2 is connected to the outdoor unit through a refrigerant pipe.

  An electrical component box 19 is provided on the side surface (right side surface in FIG. 1) of the blower chamber FC of the housing 10. The electrical component box 19 accommodates a power supply unit and a circuit board (both not shown) inside, and is sealed with a waterproof seal so that water does not enter inside. The electrical component box 19 is screwed to the top plate 11 together with the fixed frame 40.

  The top plate 11 is made of sheet metal and covers the top surface of the housing 10. On both sides of the top plate 11, there are two left and right suspension fittings 111 for hanging the indoor unit 2 on a ceiling slab via suspension bolts (not shown). (4 places in total) are provided.

  The side plates 12 a and 12 b are made of sheet metal, cover the side surface of the housing 10, and are screwed to the side surfaces of the top plate 11 and the partition plate 20.

  The heat exchanger chamber bottom plate 13 and the blower chamber bottom plate 14 are disposed on the bottom surface of the housing 10 and are removed during maintenance. A drain pan 50 is disposed between the heat exchanger chamber bottom plate 13 and the heat exchanger 15.

  In this embodiment, the heat exchanger 15 is connected to each end of two fin-type heat exchangers formed in a plate shape, and the other end side is separated by a predetermined distance to form a “laterally V-shaped”. The heat exchanger is used and is arranged so that the connecting portion (the top of the V-shaped portion) faces the air outlet 17 (see FIG. 10).

  Referring to FIGS. 3, 4, and 7, the blower unit 16 is driven by the fan motor 161 of both shafts having two output shafts 162 (162 a and 162 b) drawn in opposite directions, and the fan motor 161. And a plurality of blower fans arranged along the partition plate 20. In this embodiment, the blower fans are sirocco fans 163, and the sirocco fans 163 are four units 163a to 163d, one of which is connected to one output shaft 162a of the fan motor 161, and the remaining three units 163b to 163b 163d is coaxially connected to the other output shaft 162b, and the sirocco fan 163a and the sirocco fan 163b are located next to the left and right of the fan motor 161.

  The fan motor 161 is supported from the partition plate 20 to the top plate 11 via an L-shaped motor mounter 27.

  The sirocco fan 163 (163a to 163d) includes a cylindrical fan body 164 having a rotating shaft connected to the output shaft 162 of the fan motor 161 at the center and a large number of fan blades along the circumferential direction. A fan casing 165 is provided on the outer periphery of the fan body 164.

  The fan casing 165 includes a casing body 166 that surrounds the outer peripheral surface of the sirocco fan 163, and an air blowing part 167 that extends from a part of the casing body 166 along the tangential direction of the fan body 164. Air suction ports 168 are opened on both side surfaces of the casing body 166.

  The partition plate 20 is provided with a communication hole 26 for communicating the heat exchanger chamber HC and the blower chamber FC in correspondence with the sirocco fan 163. In this embodiment, since there are four sirocco fans 163, four communicating holes 26 (26 a to 26 d) are provided in the partition plate 20 according to this number.

  Each communication hole 26 is formed by cutting a part of the partition plate 20 into, for example, a rectangular shape, and is arranged so that the air blowing portion 167 of the casing body 165 is matched therewith. In this embodiment, a locking claw 167 a for the partition plate 20 is provided at the upper end of the air blowing portion 167, and the fan casing 165 is a fan for the partition plate 20 in a state where the locking claw 167 a is hooked on the partition plate 20. Screwed to the side of the chamber FC. The air blown into the heat exchanger chamber HC from the communication hole 26 spreads as it approaches the heat exchanger 15 and hits the entire heat exchanger 15.

  However, the communication holes 26 are not arranged at equal intervals, but as shown in FIG. 3, two communication holes arranged on both sides of the fan motor 161 (in FIG. 3, the first communication hole 26a for the sirocco fan 163a and Since the interval between the second communication holes 26b) for the sirocco fan 163b is larger than the interval between the other communication holes 26 by the installation space of the fan motor 161, the communication holes 26a and 26b are connected to the inside of the heat exchanger chamber HC. Since the air blown to the air hits the heat exchanger 15 before spreading, it flows through the space A (portion indicated by hatching in FIG. 7) corresponding to the fan motor 161 with the partition plate 20 interposed therebetween, and enters the heat exchanger 15. Reaching air is less than other parts. As a result, the wind speed of the air hitting the heat exchanger 15 becomes non-uniform and the heat exchange efficiency is lowered.

  Therefore, in this embodiment, as shown in FIG. 7, the first communication hole 26a and the second communication hole 26b are disposed on the fan motor 161 side, and the first and second communication holes 26a and 26b are connected to the heat exchanger 15. There is provided air guide means 30 for guiding a part of the blown air as a branched air flow toward the space A between the first communication hole 26a and the second communication hole 26b.

  That is, on one side of the first communication hole 26a, a part of the air blown out from the first communication hole 26a by the sirocco fan 163a is provided as one air guide means 30 that guides the air flow Fa to the fan motor 161 side. A first air guide unit 30a is provided.

  Similarly, on the other second communication hole 26b side, as the other air guiding means 30 for guiding a part of the air blown from the second communication hole 26b by the sirocco fan 163b to the fan motor 161 side as a branched air flow Fb. The second air guide unit 30b is provided.

  Note that the first air guide unit 30a and the second air guide unit 30b are disposed at the fan motor 161 side edges of the first and second communication holes 26a and 26b, respectively. That is, in FIG. 4, the first air guide unit 30a is arranged at the left end of the first communication hole 26a, and the second air guide unit 30b is arranged at the right end of the second communication hole 26b.

  Referring to FIG. 5, the first air guide unit 30a performs heat exchange from the base plate 31 disposed along the edge of the first communication hole 26a and one end of the base plate 31 (the right end in FIG. 5A). And an air guide portion 32 projecting into the chamber HC.

  The base plate 31 is provided with two screwing holes 311 and 311 for screwing the first air guide unit 30a to the partition plate 20 in this example. As shown in FIG. 5B, the back surface of the base plate 31 is provided with a recess 312 for preventing the locking claw 167 a from interfering with the base plate 31.

  The air guide portion 32 has a vertically long rectangular opening 33 that communicates with the first communication hole 26a, and the first guide fin 34 and the second guide fin 35 form a pair on the long sides of the opening 33 that face each other. Is provided. Thereby, a branch air flow path is formed in the space between the first guide fin 34 and the second guide fin 35.

  The first and second guide fins 34 and 35 have base end portions 34a and 35a formed in a flat plate shape parallel to the flow direction of the blown air flow, and a predetermined angle from the base end portions 34a and 35a toward the downstream side. Inclined portions 34b and 35b which are inclined at the angle.

  The inclined portions 34b and 35b of the first and second guide fins 34 and 35 have a part of the air blown out from the first communication hole 26a as a branch air flow (in the center direction of the space A in FIG. 5C). The predetermined angle is set so as to be directed diagonally downward to the left.

  Next, referring to FIG. 6, the second air guide unit 30b includes a base plate 31 disposed along the edge of the second communication hole 26b and one end of the base plate 31 (the left end in FIG. 6A). To the heat exchanger chamber HC. In addition, the same referential mark is attached | subjected to the location considered the same as or the same as the 1st wind guide unit 30a mentioned above.

  The base plate 31 is provided with two screwing holes 311 and 311 for screwing the second air guide unit 30b to the partition plate 20 in this example. As shown in FIG. 6B, a recess 312 is provided on the back surface of the base plate 31 so that the locking claw 167 a does not interfere with the base plate 31.

  The air guide portion 32 has a vertically-long rectangular opening 33 that communicates with the second communication hole 26 b, and the first guide fin 34 and the second guide fin 35 are paired on the opposite long sides of the opening 33. Is provided. Thereby, a branch air flow path is formed in the space between the first guide fin 34 and the second guide fin 35.

  The first and second guide fins 34 and 35 have base end portions 34a and 35a formed in a flat plate shape parallel to the flow direction of the blown air flow, and a predetermined angle from the base end portions 34a and 35a toward the downstream side. Inclined portions 34b and 35b which are inclined at the angle.

  Each of the inclined portions 34b and 35b of the first and second guide fins 34 and 35 has a part of the air blown out from the second communication hole 26b as a branch air flow Fa and Fb in the center direction of the space A (FIG. 6 ( In c), the predetermined angle is set so as to be directed diagonally downward to the right.

  According to this, as shown in FIG. 7, a part of the air blown out from the one first communication hole 26a toward the heat exchanger chamber HC is left as a branched air flow Fa by the first air guide unit 30a. Part of the air blown toward the space A obliquely below and blown toward the heat exchanger 15 from the other second communication hole 26b is right as a branched air flow Fb by the second air guide unit 30b. It blows off toward the space A diagonally below. As a result, the air flows through the entire heat exchanger 15, and the nonuniformity of the wind speed is improved, so that the heat exchange efficiency is improved. Moreover, since most of the air blown toward the space A passes through the heat exchanger 15, abnormal noise generated by the air flowing along the surface of the heat exchanger 15 is also suppressed.

  In order to direct each part of the blown air from the first and second communication holes 26a, 26b to the space A as a branched air flow by the first air guiding unit 30a and the second air guiding unit 30b, FIG. As shown in FIG. 8, each branch air flow Fa so that the branch air flow Fa from the first communication hole 26 a side and the branch air flow Fb from the second communication hole 26 b side reach the vicinity of the connection portion J of the heat exchanger 3. It is preferable to adjust the flow direction.

  In the first embodiment, the fan motor 161 is a double-axis fan motor. However, the present invention can be applied to an embodiment using a single-axis fan motor. That is, as shown in FIG. 9, the duct type air conditioner 1B according to the second embodiment of the present invention uses a single-axis fan motor having one output shaft 162c as the fan motor 161c. A sirocco fan 163e is attached to 162c. In this embodiment, one sirocco fan 163e is connected to the output shaft 162c, but a plurality of sirocco fans 163e may be provided.

  The partition plate 20 is provided with a third communication hole 26c corresponding to the sirocco fan 163e, and the third air guide unit 30c is attached to the edge of the third communication hole 26c on the fan motor 161c side. Since the 3rd wind guide unit 30c is the same shape as the 2nd wind guide unit 30b of 1st Embodiment mentioned above, the description is abbreviate | omitted.

  According to this, a part of the air blown out from the third communication hole 26e toward the heat exchanger 15 is blown out toward the space A obliquely lower right as a branched air flow Fc by the third air guide unit 30c. The As a result, the air flows through the entire heat exchanger 15 and the nonuniformity of the wind speed is improved, so that the heat exchange efficiency is improved as in the first embodiment, and the generation of abnormal noise is also suppressed. Such an embodiment is also included in the present invention.

DESCRIPTION OF SYMBOLS 1,1B Duct type air conditioner 2 Indoor unit 10 Case 11 Top plate 12a, 12b Side plate 13 Heat exchanger room bottom plate 14 Blower room bottom plate 15 Heat exchanger 16 Blower unit 17 Air outlet 18 Air inlet 19 Electrical equipment Product box 20 Partition plate 22 Receiving plate portion 23 First screwing portion 24 Second screwing portion 25 Recessed portion 26 Communication hole 26a First communication hole 26b Second communication hole 30 Air guide means 30a First air guide unit 30b Second guide Wind unit 30c Third wind guide unit 31 Mounting frame 32 Wind guide portion 33 Opening portion 34 First guide fin 35 Second guide fin 40 Fixed frame 50 Drain pan FC Blower chamber HC Heat exchanger chamber

Claims (3)

A heat exchanger chamber on the air outlet side that includes a rectangular parallelepiped housing having an air outlet on the front surface and an air suction port on the rear surface, and in which the heat exchanger is housed by a partition plate And a fan chamber on the air suction port side that houses the blower unit. The fan unit has a fan motor having an output shaft, and is connected to the output shaft of the fan motor, and the partition plate A duct-type air conditioner in which the partition plate is provided with a communication hole that communicates the blower chamber and the heat exchanger chamber in accordance with the blower fan. ,
In the communication hole located next to the fan motor, a part of the air flow blown from the blower fan toward the heat exchanger is directed to a space facing the fan motor with the partition plate interposed therebetween. A duct type air conditioner characterized in that it is provided with a wind guide means for making a branched air flow to be blown out.   The fan motor has output shafts at both ends, the blower fans are attached to the output shafts, and the partition plate is provided with a plurality of communication holes for each of the blower fans. Item 2. A duct-type air conditioner according to Item 1.   The air guide means includes a base plate having an opening communicating with a part of the communication hole, and guide fins erected in parallel from both sides of the opening of the base plate, and the guide fins The duct type air conditioner according to claim 1 or 2, wherein a flow path for the branched air flow is formed.

Images