JP2015175557A - duct type air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a duct type air conditioner which makes wind speed distribution of the air blowing against a heat exchanger uniform and which improves heat exchange efficiency.SOLUTION: A duct type air conditioner includes: a housing 10 in which an air outlet 12 is provided on a front surface and an air suction port 11 is provided on a back surface; a heat exchanger 20A which is arranged inside of the air outlet of the housing in a manner inclined with respect to a ventilation direction ; a turbo fan 50A arranged inside the air suction port of the housing; and a wind direction guide plate 60A for guiding inflow/outflow of the air to the turbo fan. In the wind direction guide plate, an opening 65A for blowing is formed which is expanded in a lateral direction on a tip side located on the side of the heat exchanger. The heat exchanger is inclined in such a manner that the side facing the opening for blowing of the wind direction guide plate becomes the side of the air outlet, and the side facing a motor 30 becomes the wind direction guide plate side.

Description

  The present invention relates to a duct type air conditioner with improved heat exchange efficiency.

  Some duct-type air conditioners use a sirocco fan as a blower fan. Duct-type air conditioners that use sirocco fans have been under various efforts to make the wind speed distribution on the heat exchanger uniform, depending on the size and number of sirocco fans, the shape of the corresponding heat exchanger, etc. It was.

  However, since the sirocco fan has a spiral casing, sucks air from both sides, and blows out air from the front, the wind speed distribution is unevenly distributed, so in a duct type air conditioner using a sirocco fan, The wind speed distribution has not improved dramatically. Patent Document 1 describes an indoor unit using a sirocco fan.

  It may be possible to solve the problem of uniforming the wind speed distribution of the wind hitting the heat exchanger by installing a turbo fan in the duct type air conditioner. As a device using this turbo fan, there is a blower device as described in Patent Document 2, but this is only a blower device, and heat exchange cannot be performed, and the wind speed distribution hitting the heat exchanger should be made uniform. Is not described.

JP 09-273801 A JP 2010-84701 A

  An object of the present invention is to provide a duct-type air conditioner in which the wind speed distribution of a wind hitting a heat exchanger is made uniform, heat exchange efficiency is improved, and further downsizing and thinning are realized.

  In order to achieve the above-mentioned object, the invention according to claim 1 includes a housing provided with an air outlet on the front surface and an air inlet on the back surface, and the air inlet and the air outlet in the housing. A heat exchanger disposed in an air flow path connecting the air flow path with an inclination with respect to a ventilation direction, a turbo fan disposed between the air suction port of the air flow path and the heat exchanger, and the turbo fan In a duct type air conditioner comprising a motor for driving air and a wind direction guide plate for guiding the flow of wind into and out of the turbofan, the wind direction guide plate is on the tip side located on the heat exchanger side. A blowout opening that is expanded in the lateral direction corresponding to the lateral width of the heat exchanger is formed, and a suction opening is formed in one of the upper surface and the lower surface of the wind direction guide plate, and the heat exchanger The back on the opposite side is closed, The side surface is closed and either the upper surface or the lower surface of the wind direction guide plate is closed, and the heat exchanger is either above or below the heat exchanger corresponding to the outlet opening of the wind direction guide plate. One of them is away from the wind direction guide plate, and either the upper side or the lower side of the heat exchanger corresponding to the motor is inclined so as to approach the wind direction guide plate.

  According to a second aspect of the present invention, in the duct type air conditioner according to the first aspect, the opening width of the blowing direction guide plate is set to a size corresponding to the width of the heat exchanger. It is characterized by being.

  According to a third aspect of the present invention, in the duct type air conditioner according to the first or second aspect, the wind direction guide plate is configured such that one of the upper surface and the lower surface is a closed part of the housing. It is shared.

  According to a fourth aspect of the present invention, in the duct type air conditioner according to the first, second, or third aspect, the suction opening of the wind direction guide plate causes the air sucked from the suction port to rotate the rotating shaft of the turbofan. It guides to the said turbo fan from the direction along.

  According to the present invention, since the heat exchanger is disposed at an inclination, the air blown out by the turbofan can be applied almost uniformly to the heat exchanger, and the heat exchange efficiency is improved. In addition, by arranging the heat exchanger at an angle, the turbo fan can be made thinner and smaller, and the motor that drives the turbo fan can be made smaller, and the indoor unit casing can also be made thinner. be able to.

It is a longitudinal cross-sectional view of the duct type air conditioner of one Example of this invention. It is a top view of the state which removed the upper surface part of the housing | casing of the duct type air conditioner of FIG. It is a top view of the state which removed the upper surface part of the box of the duct type air conditioner of FIG. 1, and also removed the 1st, 2nd turbo fan, the motor, and the wind direction guide plate.

  1 to 3 show a duct type air conditioner according to an embodiment of the present invention. Reference numeral 10 denotes a housing, which is provided with an air suction port 11 having a duct connection frame 70 to which a suction side duct (not shown) is connected on the back side (right side), and a blowout side duct (not shown) on the front side (left side). 1) is provided with an air outlet 12 having a duct connection frame body 80 to which is connected.

  Reference numerals 20A and 20B denote first and second heat exchangers, which are arranged in a horizontal V shape when viewed from the side.

  Reference numeral 30 denotes a double-shaft type motor, in which the first output shaft 31 and the second output shaft 32 are provided so as to protrude in opposite directions so as to face the vertical direction, and are horizontally positioned between both side walls of the housing 10. Is mounted with a screw or the like (not shown) in the central opening 41 of the motor mount 40 spanned by

  Reference numerals 50A and 50B denote thin first and second turbofans. The first turbofan 50A is attached to the first output shaft 31 of the motor 30, and the second turbofan 50B is the second turbofan 50B. It is attached to the output shaft 32.

  Reference numerals 60A and 60B denote wind direction guide plates which individually guide the wind sucked from the air suction port 11 to the turbo fans 50A and 50B. The wind direction guide plates 60A, 60B are curved back plates 61A, 61B, side plates 62A, 63A, 62B, 63B linearly continuous to the back plates 61A, 61B (however, 62B, 63B are not shown), Plate members 64A and 64B having suction openings 64Aa and 64Ba, and blowout openings 65A and 65B that are widened in the lateral direction are provided facing the heat exchangers 20A and 20B. The plate material 64A constitutes the lower surface of the wind direction guide plate 60A, and the plate material 64B constitutes the upper surface of the wind direction guide plate 60B. The opening widths of the blowing openings 65A and 65B correspond to the width W of the heat exchangers 20A and 20B. A part of the upper surface wall 10a of the housing 10 is shared by the upper surface plate that closes the upper surface side of the wind direction guide plate 60A and forms the upper surface, and the lower surface plate that closes the lower surface side of the wind direction guide plate 60B and forms the lower surface. A part of the lower wall 10b of the housing 11 is shared. Reference numeral 66 denotes a partition plate, which constitutes a part of the back wall of the wind direction guide plates 60A and 60B and prevents the air sucked from the air suction port 11 from passing directly in the direction of the heat exchangers 20A and 20B. The air is guided to the turbo fans 50A and 50B. The partition plate 66 has a vertical orientation between the side walls 10c and 10d on both sides of the housing 10 so as to partition the heat exchangers 20A and 20B and the turbofans 50A and 50B (see FIG. 1 in a direction perpendicular to the paper surface).

  In the heat exchanger 20A, the upper side facing the blowing opening 65A of the airflow direction guide plate 60A is the air outlet 12 side, and the lower side facing the motor 30 is the airflow direction guide plate 60A side with respect to the airflow direction. Is inclined. That is, the upper surface 20Aa is inclined and arranged so that the airflow direction guide plate 60A faces and the lower surface 20Ab faces the air outlet 12.

  Further, in the heat exchanger 20B, the airflow direction is such that the lower side facing the blowout opening 65 of the airflow direction guide plate 60B is the air outlet 12 side and the upper side facing the motor 30 is the airflow direction guide plate 60B side. It is inclined with respect to. That is, the lower surface 20Bb is inclined and arranged so that the airflow direction guide plate 60B faces and the upper surface 20Ba faces the air outlet 12.

  Thereby, heat exchanger 20A, 20B is arrange | positioned at the horizontal V shape opened to the side of the air blower outlet 12 seeing from a side surface as mentioned above.

  Reference numeral 90 denotes a refrigerant pipe connection nut connected to an outdoor unit (not shown).

  Now, the air sucked from the air suction port 11 is sucked into the first turbofan 50A from the suction opening 64Aa of the wind direction guide plate 60A by the rotation of the first turbofan 50A, and heat exchange is performed from the blowout opening 65A. The air is blown to the container 20 </ b> A, and heat is exchanged with the refrigerant there.

  At this time, the heat exchanger 20A is arranged so as to be inclined so that the upper surface 20Aa faces the wind direction guide plate 60A and the lower surface 20Ab faces the air outlet 12, and the blowout opening 65A of the wind direction guide plate 60A is in the lateral direction. Therefore, almost all of the air blown from the first turbofan 50A hits the entire upper surface 20Aa of the heat exchanger 20A. Moreover, although the upper wind force of the first turbofan 50A is stronger than the lower wind force, since the heat exchanger 20A is inclined, the upper side of the upper surface 20Aa of the heat exchanger 20A extends from the first turbofan 50A. Since the distance increases, the wind pressure over the entire upper surface 20Aa of the heat exchanger 20A is substantially averaged.

  The air sucked from the air suction port 11 is sucked into the second turbofan 50B from the suction opening 64Ba of the wind direction guide plate 60B by the rotation of the second turbofan 50B, and heat exchange is performed from the blowout opening 65B. The air is blown to the container 20 </ b> B, where heat is exchanged with the refrigerant, and then blown out from the air outlet 12.

  At this time, the heat exchanger 20B is arranged so as to be inclined such that the lower surface 20Bb faces the wind direction guide plate 60B and the upper surface 20Ba faces the air outlet 12, and the blowout opening 65B of the wind direction guide plate 60B is in the lateral direction. Therefore, almost all of the air blown from the second turbofan 50B hits the entire lower surface 20Bb of the heat exchanger 20B. In addition, although the lower wind force of the second turbofan 50B is stronger than the upper wind force, since the heat exchanger 20B is inclined, the lower side of the lower surface 20Bb of the heat exchanger 20B is from the second turbofan 50B. Since it becomes far, the wind pressure to the whole lower surface 20Bb of the heat exchanger 20B is almost averaged.

  From the above, in the duct type air conditioner of the present embodiment, the wind pressure from the first turbofan 50A to the entire surface of the heat exchanger 20A and the wind pressure from the second turbofan 50B to the entire surface of the heat exchanger 20B are respectively Since averaging is performed, the heat exchange efficiency can be improved and the heat exchange capacity can be increased. At this time, since the air volume is small, the motor 30 that drives the turbofans 50A and 50B can be downsized.

  Further, the turbofans 50A and 50B are thin and are arranged so as to overlap with the vertical direction of the motor 30, and the heat exchangers 20A and 20B are arranged in a V shape when viewed from the side, so that the casing 10 can be reduced in thickness and size.

  Further, since the heat exchangers 20A and 20B are inclined and arranged in a V shape when viewed from the side, the heat exchangers 20A and 20B can have a larger area compared to the case where the heat exchangers 20A and 20B are arranged vertically.

  Note that the wind direction guide plate 60A shares a part of the upper surface wall 10a of the housing 10 with its upper surface plate, and the wind direction guide plate 60B has a lower surface plate with a lower surface of the housing 10 and a part of the lower surface wall 10b of the housing 10 as its lower surface plate. However, it is also possible to provide a box shape that surrounds the turbofans 50A and 50B by providing an upper surface plate and a lower surface plate independently of each other.

10: Housing, 10a: Upper wall, 10b: Lower wall, 10c, 10d: Side wall, 11: Air inlet, 12: Air outlet 20A: First heat exchanger, 20Aa: Upper surface, 20Ab: Lower surface, 20B: Second heat exchanger, 20Ba: Upper surface, 20Bb: Lower surface 30: Motor, 31: First output shaft, 32: Second output shaft 40: Motor mount 50A: First turbo fan, 50B: First 2 turbo fan 60A, 60B: wind direction guide plate, 61A, 61B: back plate, 62A, 63A, 62B, 63B (however, 62B, 63B are not shown): side plate, 64A, 64B: plate material, 64Aa, 64Ba : Suction opening, 65A, 65B: Blowing opening, 66: Partition plate 70, 80: Duct connection frame 90: Refrigerant pipe connection nut

Claims (4)

A casing provided with an air outlet on the front and an air inlet on the back, and an air flow passage connecting the air inlet and the air outlet in the casing are arranged to be inclined with respect to the ventilation direction. A heat exchanger, a turbo fan disposed between the air inlet of the air flow passage and the heat exchanger, a motor for driving the turbo fan, and a wind flow into and out of the turbo fan. In a duct type air conditioner equipped with a wind direction guide plate for guiding,
The airflow direction guide plate is formed with a blowout opening that expands in a lateral direction corresponding to a lateral width of the heat exchanger on a front end side located on the heat exchanger side, and is formed on an upper surface and a lower surface of the airflow direction guide plate. A suction opening is formed in any one of them, a back surface located on the side opposite to the heat exchanger side is closed, both side surfaces are closed, and one of the upper surface and the lower surface of the wind direction guide plate is Close,
In the heat exchanger, either the upper side or the lower side of the heat exchanger corresponding to the blowing opening of the wind direction guide plate is moved away from the wind direction guide plate, and the upper side of the heat exchanger corresponding to the motor Or, the lower side is inclined so that the other side approaches the wind direction guide plate,
This is a duct type air conditioner. In the duct type air conditioner according to claim 1,
The duct-type air conditioner characterized in that the blowout opening of the wind direction guide plate is set to have a width corresponding to the width of the heat exchanger. In the duct type air conditioner according to claim 1 or 2,
The duct type air conditioner characterized in that one of the upper and lower surfaces of the wind direction guide plate is shared by a part of the casing. In the duct type air conditioner according to claim 1, 2, or 3,
The duct type air conditioner, wherein the suction opening of the wind direction guide plate guides the wind sucked from the suction port to the turbo fan from a direction along a rotation axis of the turbo fan.

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